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Preprint ARTICLE | doi:10.20944/preprints202404.2017.v1

The Annealing Kinetics of Defects in CVD Diamond Irradiated by Xe Ions

Eugene Kotomin, Vladimir Kuzovkov, Aleksandr Lushchik, A. I. Popov, Evgeni Shablonin, Theo Scherer, Evgeni Vasil’chenko

Subject: Inorganic And Nuclear Chemistry, Chemistry And Materials Science Keywords: CVD diamond; swift heavy ions; irradiation; Xe; optical absorption; Frenkel defects; interstitial ions; thermal annealing; diffusion-controlled reactions

Online: 1 May 2024 (04:05:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1996.v1

Validation of modified electrode surfaces as Sensitive Analytical Tools in Soil Analysis; Detection of Total Concentration of Zn (II), Cd(II), Pb(II), Cu(II)/Cu (I) along with Handling Complicated Sample Matrices

Vasiliki Keramari, Sotiria Papadimou, Evangelia E. Golia, Stella Girousi

Subject: Analytical Chemistry, Chemistry And Materials Science Keywords: Heavy metals; anodic stripping voltammetry; Bismuth film electrode; atomic absorption spectroscopy; speciation analysis; urban and agricultural soils; natural and spiked samples

Online: 30 April 2024 (11:47:02 CEST)

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Heavy metals constitute pollutants particularly common in air, water, and soil. They are present in both urban and rural environments, on land and in marine ecosystems, causing serious environmental problems since they do not degrade easily, remain almost unchanged for long periods, and bioaccumulate. Detection, though especially quantification, is a systematic process as monitoring of their levels needs to be carried out at regular intervals since there is often seasonal variation. The need for rapid and low-cost determination of metals is therefore considerable. In the present study atomic absorption spectroscopy (AAS), using a flame or graphite furnace, and square wave anodic stripping voltammetry (SWASV), using a bismuth thin film electrode, a sensitive voltammetric method is being compared and analytically validated. Atomic absorption spectroscopy (AAS) represents a well-established analytical technique while anodic stripping voltammetry is being criticized for its applicability in complicated sample matrices such as soil samples. This sample-handling challenge is being investigated in the present study. The results show that both methods AAS and ASV were satisfactorily correlated and showed that the concentration of metals is lower than the limit values, but with increasing trend. Therefore, continuous monitoring of metal levels in the urban complex of the city is necessary and a matter of great importance. Regarding Cd, the detection limits of Cd are lower compared to those of AAS when using the graphite furnace, while an overestimation was noted when using flame-AAS in comparison with those found with SWASV. The SWASV method has the advantage of being cheaper and faster, enabling the simultaneous determination of heavy elements across the range of concentrations that these elements can occur in Mediterranean soils. Additionally, we applied a dsDNA-modified electrode which can be used in the speciation analysis of Cu(I) and Cu(II). The changes in the characteristic peaks of guanine and adenine can be applied in the redox speciation analysis of copper in soil which represents an issue of great importance.

Preprint ARTICLE | doi:10.20944/preprints202404.1927.v1

Design of a New Supersonic Shock Wave Generator and Application in Power Generation

Ming-Sen Hu, Uzu-Kuei Hsu

Subject: Energy And Fuel Technology, Engineering Keywords: renewable energy; high-pressure gas; supersonic shock wave; shock wave monitoring system; power generation system; automatic control process; power efficiency analysis.

Online: 29 April 2024 (15:23:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1893.v1

Disturbance Observer-Based Anti-shock Controller for Laser Beam Steering Systems

Jung-Gon Kim

Subject: Control And Systems Engineering, Engineering Keywords: laser beam steering; fast-steering mirror; tip-tilt control system; anti-shock controller; disturbance observer

Online: 29 April 2024 (09:56:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1506.v1

Validity of LiPON Conductivity Determined by Impedance Spectroscopy

Alexander Rudy, Alena Novozhilova, Julia Egorova

Subject: Electrochemistry, Chemistry And Materials Science Keywords: ; solid electrolyte; impedance spectroscopy; absorption current; electric double layer; Debye length; drift conductivity ;

Online: 23 April 2024 (09:47:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1208.v1

Cellulose, Rice Husk and Polyvinyl Acetate-Based Composite: Flame Retardancy and Fungi Growth Experimental Study

Sergio González-Serrud, Nacarí Marín-Calvo

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: recycled cellulose; rice husk waste; fire resistance; fungal growth; water absorption; density; natural fibers; resource sustainability; building sustainability

Online: 18 April 2024 (07:51:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1147.v1

Polarization and Incident Angle Independent Multifunctional and Multiband Tunable THz Metasurface Based on VO₂

Rehmat Iqbal, Cao Jie, Ubaid ur Rahman Qureshi, Zia Ur Rehman, Naveed Jafar

Subject: Engineering, Other Keywords: Metasurface; Terahertz (THz); Polarization Conversion; Absorption; Polarization angle; vanadium dioxide (VO₂)

Online: 17 April 2024 (13:33:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0550.v1

Techno-Economic Evaluation on Solar-Assisted Post-Combustion CO₂ Capture in Hollow Fiber Membrane Contactors

Junkun Mu, Jinpeng Bi, Yuexia Lv, Yancai Su, Wei Zhao, Hui Zhang, Tingting Du, Fuzhao Li, Hongyang Zhou

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: solar thermal energy; membrane gas absorption; hollow fiber membrane contactor; technical feasibility; economic assessment

Online: 9 April 2024 (07:19:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0221.v1

Solar Wind Charge-Exchange X-ray Emissions from the O⁵⁺ Ions in the Earth’s Magnetosheath

Zhicheng Zhang, Fei He, Xiao-Xin Zhang, Guiyun Liang, Xueyi Wang, Yong Wei

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: solar wind charge-exchange (SWCX); earth magnetosheath; X-Ray spectrum; interplanetary shock; bow shock; Magnetopause

Online: 2 April 2024 (15:13:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0192.v1

Explicit Numerical Study on Dynamic Behavior of Threadbar under Impact Loading

L.Y. Marulanda, J.A. Vallejos, J.I. Velásquez

Subject: Engineering, Mining And Mineral Processing Keywords: Rockbursts; Threadbar; Dynamic testing; Numerical modelling; energy absorption

Online: 2 April 2024 (10:26:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1863.v1

Adjoint Solver-Based Analysis of Mouth-Tongue Morphologies on Vapor Deposition in the Upper Airway

Mohamed Talaat, Xiuhua Si, Jinxiang Xi

Subject: Engineering, Bioengineering Keywords: morphological effect; adjoint solver; shape sensitivity; computational fluid dynamics (CFD); mu-cus-tissue layer; vapor transport; wall absorption; Acetaldehyde; Benzene

Online: 29 March 2024 (13:16:42 CET)

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Preprint REVIEW | doi:10.20944/preprints202403.1664.v1

Nitric Oxide in the Mechanisms of Cell Death and Cytoprotection

Igor Belenichev, Olena Popazova, Nina Bukhtiyarova, Dmytro Savchenko, Valentyn Oksenych, Oleksandr Kamyshnyi

Subject: Biology And Life Sciences, Cell And Developmental Biology Keywords: Nitric oxide; NO; inducible nitric oxide synthases; iNOS; endothelial nitric oxide synthases; eNOS; heat shock proteins; HSP

Online: 27 March 2024 (10:05:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1593.v1

Comparative Simulation of Plasmonic Nanostructures: Optical Response of Periodic Metal Nanostrip and Nanodisk Arrays on Mirror

Niloofar Ebrahimzadeh Esfahani, Jaroslav Kováč, Jr., Giuseppe Maruccio, Silvia Rizzato, Soňa Kováčová

Subject: Engineering, Electrical And Electronic Engineering Keywords: Nanodisk; nanostrip; plasmonic; field enhancement; absorption; scattering cross section; extinction cross section

Online: 26 March 2024 (11:54:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1429.v1

Shock Wave and Aeroelastic Coupling in Overexpanded Nozzle

Haifeng Hu, Xinni Gao, YuShan Gao, Jianwen Yang

Subject: Engineering, Aerospace Engineering Keywords: shock wave; side load; Aeroelastic; CFD/CSD

Online: 25 March 2024 (06:25:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1003.v1

Enhanced Energy Absorption in Bioinspired Combined TPMS-Gyroid and Walled TPMS-Gyroid Lattice Structure Manufactured via Fused Filament Fabrication (FFF)

Dawit Bogale Alemayehu, Masahiro Todoh

Subject: Engineering, Mechanical Engineering Keywords: Keywords; bio-inspired; gyroid lattice, Boolean subtraction; finite element analysis; plastic plateau; densification; energy absorption; relative density; size effect

Online: 18 March 2024 (10:39:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1014.v1

Structural and Optical Characterization of Porous NiV2O6 Films Synthesized by Nebulizer Spray Pyrolysis for Photodetector Applications

Ahmed Kotbi, Islam Radaf, Ilham Hamdi Alaoui, Anna Cantaluppi, Andreas Zeinert, Abdelilah LAHMAR

Subject: Physical Sciences, Applied Physics Keywords: NiV2O6 thin films; Porous microstructure; Absorption coefficient; Energy gap; Photodetector

Online: 18 March 2024 (10:37:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0937.v1

Acoustic properties of surfaces covered by multipole resonators

Nikolay Kanev

Subject: Physical Sciences, Acoustics Keywords: acoustic metasurface; impedance; tangential impedance; monopole; dipole; linear multipole; reflection coefficient; absorption coefficient; high order impedance boundary condition (HOIBC); homogenization

Online: 15 March 2024 (14:41:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0852.v1

Balloon Valvuloplasty In Congenital Critical Aortic Valve Stenosis – A Rescue Procedure For The Left Ventricle

Jochen Pfeifer, Axel Rentzsch, Martin Poryo, Hashim Abdul-Khaliq

Subject: Medicine And Pharmacology, Pediatrics, Perinatology And Child Health Keywords: critical aortic valve stenosis; transcatheter balloon valvuloplasty; retrieval loop; neonate; cardiogenic shock; left ventricular dysfunction

Online: 14 March 2024 (15:16:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1524.v1

Coccomyxa Kj Components Enhance the Expression of Metallothioneins and Th17 Cytokines during Human T Cell Activation

Toshiro Seki, Shino Oshima, Satoko Komatsu, Soga Yamada, Hirofumi Kashiwagi, Yumiko Goto, Banri Tsuda, Akiko Kanno, Atsushi Yasuda, Hitoshi Kuno, Noriko Tsuji, Takashi Shiina, Yoshie Kametani

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: Coccomyxa subellipsoidea KJ; metallothioneins; Th17 cytokines; T cell activation; immunoregulation; transcriptome analysis; peripheral blood mononuclear cells; inflammatory factors; toxic shock syndrome toxin-1; immune regulatory drugs

Online: 27 February 2024 (10:26:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1371.v1

The Influence of Geometry on the Energy Capture of a Point Absorber Wave Energy Converter in the Coast of Mexico

Alejandro Martinez Flores, Ayrton Alfonso Medina Rodríguez, Edgar Mendoza, Rodolfo Silva

Subject: Engineering, Other Keywords: Wave energy converter, heaving buoy, mild slope equation, hydrodynamic response, energy absorption.

Online: 23 February 2024 (11:14:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1171.v1

Influence of Hypovolemia on Cardiac Function Measured by Transpulmonary Thermodilution. A Retrospective Cohort Study

Cecilia Gonzalez, Jesica Rodriguez Louzan, Agustin Traverso, Emanuele Papini, Agostina Giordana, Diana Latasa, Carlos Lovesio, Arnaldo Dubin

Subject: Medicine And Pharmacology, Internal Medicine Keywords: cardiac function; GEF limitation; global ejection fraction; TPTD; transpulmonary thermodilution; hypovolemic shock

Online: 21 February 2024 (08:05:51 CET)

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Background and Objectives Transpulmonary thermodilution has gained interest in recent years. It measures cardiac output (CO), stroke volume (SV), but also calculates global end diastolic indexed volume (GEDVI), and global ejection fraction (GEF). GEDVI is a static variable of cardiac preload. GEF provides information regarding cardiac function. GEF algorithm depends on SV and GEDVI. Therefore, in hypovolemic patients with decreased preload, SV or GEDVI could be decreased, and lead to altered GEF. The aim of our work was to evaluate whether impairment in GEDVI and SV may constitute a limitation for the interpretation of GEF in hypovolemic patients. A secondary objective was to determine factors independently associated with impaired GEF. Materials and Methods A retrospective study was conducted. Statistical analysis was performed by means of Mann Whitney and student t test. To determine correlation between GEF with SV, or GEF with GEDVI Pearson's coefficient was used. To determine factors independently associated with the presence of impaired GEF, binary logistic regression was performed. Results We included 113 patients with shock. Differences in mortality were detected in GEF (21[16-28] survivors versus 18 in non survivors[11-26]; p= 0.01). 38(34%) patients had hypovolemia. 44(39%) of them had depressed GEF values. Hypovolemic patients had lower GEF values than non-hypovolemic patients (16 [12-22] vs 20 [15-27]; p=0.01). Both SV and GEDVI had a statistically significant correlation with GEF (SV (Pearson's r 0.74; (p=0.00)) and GEDVI (Pearson's r -0.25; (p=0.00)). The only factors independently associated with low GEF were low SV and low GEDVI. Conclusion Hypovolemic patients frequently show low GEF values. We found correlation between SV and GEDVI with GEF. Low SV and low GEDVI were associated with low GEF. This could constitute a limitation in the interpretation of GEF and cardiac pump function. Hypovolemic patients could have low GEF without implying disorders in cardiac contractility.

Preprint ARTICLE | doi:10.20944/preprints202402.0803.v1

Use of Alkaline-Activated Energy Waste Raw Materials in Geopolymer Concrete

Marta Nalewajko, Michał Bołtryk

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: lightweight geopolymer concrete; aluminosilicate artificial aggregate; fly ashes; compressive strength of geopolymers; water absorption; bulk density

Online: 16 February 2024 (04:14:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0806.v1

In Vivo Absorption and Lymphatic Bioavailability of DHA from Microalgal Oil according to Its Physical and Chemical Form of Vectorization

Leslie Couëdelo, Stéphanie Lennon, Hélène Abrous, Ikram Chamekh, Corentin Bouju, Hugues Griffon, Carole Vaysse, Lionel Larvol, Gildas Breton

Subject: Biology And Life Sciences, Life Sciences Keywords: fatty acid vectorization; lymph; enterocyte; lipids; microalgal oil; long chain omega-3; bioavailability; PUFA absorption; chylomicrons

Online: 14 February 2024 (11:28:24 CET)

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Preprint REVIEW | doi:10.20944/preprints202402.0386.v1

Integrated Photonic Sensors with Enhanced Evanescent Field: Unveiling the Dynamic Interaction with the Ambient Medium

Muhammad A. Butt

Subject: Physical Sciences, Optics And Photonics Keywords: Evanescent field; photonic sensor; optical waveguide; light-matter interaction; absorption; mid-infrared.

Online: 6 February 2024 (15:36:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.2190.v1

Mechanical Properties of Lattice Structures With a Central Cube: Experiments and Simulations

Shuai Guo, Yuwei Ma, Peng Liu, Yang Chen

Subject: Engineering, Mechanical Engineering Keywords: Lattice structure; Energy absorption; Additive manufacturing; Printing defects; Finite element model

Online: 31 January 2024 (09:25:36 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1669.v1

Shock Absorption Capacity of High-Performance Polymers for Dental Implant Prosthesis: In Vitro Study

Maria Menini, Francesca Delucchi, Francesco Bagnasco, Domenico Baldi, Luigi Canullo, Paolo Setti, Marco Migliorati, Paolo Pesce

Subject: Medicine And Pharmacology, Dentistry And Oral Surgery Keywords: dental implants; shock absorption; high-performance polymers; polyetherketoneketone

Online: 23 January 2024 (10:00:15 CET)

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Preprint BRIEF REPORT | doi:10.20944/preprints202401.1581.v1

Shock-Discharge Interaction Model Extended into the Third Dimension

Anna Markhotok

Subject: Physical Sciences, Fluids And Plasmas Physics Keywords: Hypersonic Plasma Dynamics; Shock Wave Refraction; Shock-Plasma Interaction

Online: 22 January 2024 (10:40:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1519.v1

Shock Index VS Modified Shock Index as a Predictor of Mortality among the COVID-19 Patients

Abhishek S, Ramakrishnan Venkatakrishnan Trichur, Srihari Cattamanchi, Parthasarathy Vijayan

Subject: Medicine And Pharmacology, Emergency Medicine Keywords: Shock Index; Modified Shock Index; COVID-19; Mortality

Online: 22 January 2024 (08:12:12 CET)

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Introduction: The viral respiratory disorder known as severe acute respiratory syndrome (SARS) is caused by the SARS-associated coronavirus. End of May 2021, there have been over 170 million reported cases and more than 3.53 million deaths worldwide. In the field of cardiovascular performance, the shock index (SI) is a simple and widely used formula that measures the physiological response prior to systemic hypotension. It is obtained by dividing the heart rate by the systolic blood pressure. Another parameter, the modified shock index (MSI), is defined as the ratio of heart rate to mean arterial pressure (MAP). Methods: In this retrospective study, we examined the data of COVID-19 patients who were admitted to the ICU between June 1st, 2020, and January 31st, 2021. The patient details were collected from the Medical Records Department (MRD) in a tertiary care center. A case-recorded proforma was used to record the patient information, which was then analyzed using SPSS software. Results: The mean age of the patients was 67 years, consisting of 64 males (68.9%) and 29 females (31.1%). The standard deviation was calculated as 13.557. Among the patients, the minimum age recorded was 28, while the maximum age was 97. Patients with known CAD (Coronary Artery Disease) had a higher mortality rate among comorbidities. The p-value for Shock Index and Mortality Status was 0.205 (with an alpha value greater than 0.05), indicating no significant association. However, the modified shock index (MSI) showed a significant association with mortality status. The Pearson chi-square value for MSI and Mortality Status was 4.19, with a p-value of 0.041 (with an alpha value less than 0.05). These results suggest that there is a higher risk of mortality for patients with a Modified Shock Index of less than 0.7 or greater than 1.3. The MSI Odds ratio was found to be 4.500, indicating that such patients have a 4.5 times higher risk of mortality compared to others. Conclusion: In conclusion, our study found that there is no significant association between the Shock Index (SI) and mortality, as the p-value was greater than 0.05. However, the Modified Shock Index (MSI) showed a significant association with mortality status, with a p-value less than 0.05. This suggests that patients with a Modified Shock Index less than 0.7 or greater than 1.3 are at a higher risk of mortality. It is important to consider these findings when assessing the prognosis and potential interventions for COVID-19 patients.

Preprint ARTICLE | doi:10.20944/preprints202401.1541.v1

Sound-Absorbing, Thermal-Insulating Material Based on Poly (methylsiloxane) Xerogel and Cellulose Nanofibers

Daiji Katsura, Tetsuya Maeda, Kazuyoshi Kanamori, Takashi Yamamoto, Joji Ohshita

Subject: Engineering, Automotive Engineering Keywords: porous material; sound absorption; thermal insulation; heat insulation; poly(methylsiloxane) xerogel; cellulose nanofiber; microstructure modeling; homogenization method

Online: 22 January 2024 (04:36:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1547.v1

Electrical Conductivity, EMI Absorption Shielding Performance, Curing Process and Mechanical Properties of Rubber Composites

Ján Kruželák, Andrea Kvasničáková, Michaela Džuganová, Rastislav Dosoudil, Ivan Hudec, Henrich Krump

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: rubber; manganese-zinc ferrite; nickel-zinc ferrite; carbon black; carbon fibers; electromagnetic absorption shielding

Online: 22 January 2024 (04:29:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1234.v1

High-Resolution Nitrogen Dioxide Measurements from Airborne Fiber Imaging Spectrometer over Tangshan, China

Xiaoli Zhang, Liang Xi, Haijin Zhou, Wei Wang, Zhen Chang, Fuqi Si, Yu Wang

Subject: Environmental And Earth Sciences, Environmental Science Keywords: airborne; differential optical absorption spectroscopy (DOAS); imaging differential absorption spectrometer; NO2

Online: 16 January 2024 (12:34:10 CET)

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Preprint REVIEW | doi:10.20944/preprints202401.1066.v1

Toxicity Tolerance in the Carcinogenesis of Environmental Cadmium

Aleksandar Cirovic, Soisungwan Satarug

Subject: Public Health And Healthcare, Public, Environmental And Occupational Health Keywords: cadmium; cancer; cell transformation; copper; intestinal absorption; iron store status; zinc transporters

Online: 15 January 2024 (10:27:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0793.v1

Dynamics of Absorption and Concentration of Anthracene in Radishes

Haruki Shimazu

Subject: Environmental And Earth Sciences, Environmental Science Keywords: anthracene; radish; absorption; concentration

Online: 12 January 2024 (06:12:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0857.v1

Etiology Model of Kawasaki Disease and Multisystem Inflammatory Syndromes

Darrell O. Ricke, Nora Smith

Subject: Biology And Life Sciences, Life Sciences Keywords: Kawasaki disease; multisystem inflammatory syndrome; Henoch-Schönlein purpura; MIS-C; MIS-A; MIS-N; MIS-V; Kawasaki Disease Shock Syndrome; vaccines

Online: 11 January 2024 (11:28:02 CET)

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Preprint BRIEF REPORT | doi:10.20944/preprints202401.0889.v1

Impact of Mechanical Circulatory Support Timing on Outcomes in Myocardial Infarction-Related Cardiogenic Shock: Subanalysis of the PREPARE CS Registry

Dan Mihai Prunea, Eva Bachl, Lukas Herold, Sadeek Sidney Kanoun Schnur, Sascha Pätzold, Siegfried Altmanninger-Sock, Gudrun Angelika Sommer, Theresa Glantschnig, Ewald Kolesnik, Markus Wallner, Klemens Ablasser, Heiko Bugger, Eva Buschmann, Andreas Praschk, Friedrich M. Fruhwald, Albrecht Schmidt, Dirk Von Lewinski, Gabor Toth-Gayor

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: cardiogenic shock; mechanical circulatory support; myocardial infarction; mechanical circulatory support timing; in-hospital mortality

Online: 11 January 2024 (08:10:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0597.v1

Detailed Finite Element Models for the Simulation of Laser Shock Wave Response of 3D Woven Composites

Konstantinos Tserpes, Panagiotis Kormpos

Subject: Engineering, Mechanical Engineering Keywords: 3D woven composites; Laser shock; Finite element analysis; Shock wave modeling

Online: 8 January 2024 (10:54:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0448.v1

The Protective Effect of Solidagenone from Solidago chilensis Meyen against Lipopolysaccharide-Induced Shock by Regulating the NF-κB Signaling Pathway

Ivanilson Pimenta Santos, Laís Peres Silva, Dahara Keyse Carvalho Silva, Bruna Padilha Zurita Claro Do Reis, Temistocles Barroso de Oliveira, Andressa Maia Kelly, Edivaldo dos Santos Rodrigues, Claudia Valeria Campos de Souza, José Fernando Oliveira-Costa, Simone Sacramento Valverde, Osvaldo Andrade Santos-Filho, Milena Botelho Pereira Soares, Cássio Santana Meira

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: Solidagenone; Inflammation; Endotoxic shock; NF-κ B

Online: 5 January 2024 (10:37:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0416.v1

Analysis of the Optical Properties and Electronic Structure of Semiconductors of the Cu2NiXS4 (X = Si, GE, Sn) Family as New Promising Materials for Optoelectronic Devices

Dilshod Nematov

Subject: Physical Sciences, Condensed Matter Physics Keywords: bandgap; kesterites; optical properties; solar cells; absorption coefficient; dielectric constant; photoelectric applications

Online: 4 January 2024 (15:15:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0201.v1

Improvement in the Hydrogen Storage Properties of MgH2 by Adding NaAlH4

Young Jun Kwak, Myoung Youp Song, Ki-Tae Lee

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: hydrogen storage; MgH2; NaAlH4; decomposition temperature; hydrogen absorption; release rates

Online: 3 January 2024 (07:45:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.2147.v1

Enhancing the Performance for Chilled Ammonia Carbon Dioxide Capture by Use of Crystallizerconfiguration: Thermodynamic Assessment

Nnadikwe johnson, Akuchie Chukwuma justin, , Onuabuchi Azunna

Subject: Engineering, Energy And Fuel Technology Keywords: CO₂; efficiency; chilled; ammonia; capturing; absorption

Online: 28 December 2023 (05:18:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1710.v1

Clinical Predictors of Cardiac Arrest in COVID 19 Patients with History of Heart Failure

Bharat Marwaha, Indrajeet Mahata, Navneet Kumar, Goldendeep Singh, Amod Amritphale

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: COVID 19; Cardiac Arrest; Septic shock

Online: 22 December 2023 (08:15:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1671.v1

The Solid-Phase Transition of Carbapenem CS-023 Polymorphs and the Change of Helicity Observed in the Transition

Shinji Matsuura, Koichi Igarashi, Masayuki Azuma, Hiroshi Ooshima

Subject: Engineering, Chemical Engineering Keywords: antibiotics; carbapenem; pharmaceutical crystallization; polymorphism of carbapenem crystal; solid phase polymorphic transition; helicity change, over-absorption of water of anhydrous crystal

Online: 21 December 2023 (16:08:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1627.v1

Natural Gas Sweetening via Membrane-Assisted Gas Absorption. Part 1: A Hollow-Fiber Unit with MDEA-Based Absorbent

Anton Petukhov, Artem Atlaskin, Kirill Smorodin, Mariia Atlaskina, Dmitriy Mikhailovich Zarubin, Nikita S. Tsivkovsky, Sergey Kryuchkov, Anna Stepakova, Andrey Vorotyntsev, Olga Kazarina, Sergey Suvorov, Ekaterina Stepanova, Ilya Vorotyntsev

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: membrane-assisted gas absorption; natural gas processing; sweetening; gas separation; hollow fibers

Online: 21 December 2023 (08:37:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1337.v1

Impact of immunopathy and coagulopathy on multi-organ failure and mortality in a lethal porcine model of uncontrolled hemorrhagic shock

Milomir O. Simovic, James A Bynum, Bin Liu, Jurandir J. Dalle Lucca, Yansong Li

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: uncontrolled hemorrhagic shock, immunopathy, coagulopathy, MOF, mortality, swine, damage control resuscitation

Online: 18 December 2023 (13:03:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1193.v1

Theoretical Investigation on Selected 3-amino-5- [(2,4,6-trinitrophenyl)amino]-1H-1,2,4-triazole Salts with Perspective Energetic Anions

Jelena Tamuliene, Jonas Sarlauskas

Subject: Chemistry And Materials Science, Applied Chemistry Keywords: 3-amino-5-[(2,4,6-trinitrophenyl)amino]-1H-1,2,4-triazole; oxidizible salts; energetic properties; oxygen balance; stability; resistance to shock stimuli.

Online: 15 December 2023 (13:38:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0697.v1

Sustainable polypropylene-based composites with agro-waste fillers: thermal, morphological, mechanical properties, and dimensional stability.

Tatiana Zhiltsova, Jéssica Campos, Andreia Costa, Mónica S. A. Oliveira

Subject: Engineering, Mechanical Engineering Keywords: natural fibre-reinforced composites; olive pits; rice husk; non-destructive morphology assessment; polypropylene; short-term water absorption

Online: 11 December 2023 (11:52:34 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202312.0501.v1

Switching from VA-ECMO to a Percutaneous Right Ventricular Assist Device as a Bridge to Recovery in a Case of Right Ventricular Myocardial Infarction

Benjamin Assouline, Damiano Mugnai, Andres Hagerman, Lydia Wuarin, Léonore Schopfer, Karim Bendjelid, Raphaël Giraud

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: VA-ECMO; Short-term mechanical assist device; Right ventricular assist device; ProtekDuo; Cardiogenic shock; Right ventricular myocardial infarction.

Online: 7 December 2023 (16:41:21 CET)

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Preprint REVIEW | doi:10.20944/preprints202312.0352.v1

Recent Trends on Polymeric Foams and Porous Structures for Emi Shielding Applications

Marcelo Antunes

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: polymeric foams; porous structures; microcellular foams; 3D printing; carbon-based nanofillers; nanohybrids; EMI shielding; EM wave absorption

Online: 6 December 2023 (10:17:56 CET)

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Polymer-based (nano)composite foams, especially those having a microcellular structure, containing suitable conductive (nano)fillers, have been shown to act as good shielding materials, hence coming as promising to act as shields in electronic devices, limiting/avoiding electromagnetic interference (EMI) pollution. Nevertheless, due to their high (micro)structural complexity, related to their multiphase nature, there is still a lot of unawareness behind the shielding mechanisms acting in these materials, coming as a necessity to study their microstructure-cellular/porous structure-properties relations, especially in terms of their electrical conductivity and EMI shielding efficiency (EMI SE). To target and control the electrical conductivity through a controlled distribution/dispersion of conductive nanofillers, single or combined (nanohybrids), as there is a direct relation between electrical conductivity and EMI SE, as well as the main EMI shielding mechanisms working on the developed microcellular structure of the foams, which are expected to be absorption-dominated or absorption/multiple reflection-based, are two of the main objectives when combining polymer foaming with the addition of conductive nanofillers. The present review work considers the recent developments and trends on polymer-based foams containing conductive nanofillers, especially carbon-based such as carbon nanotubes or graphene-based materials, as well as similar porous structures created using trending technologies such as 3D printing, for EMI shielding applications. It is divided in different sections, starting with the strategy of microcellular foaming to develop polymer-based foams with enhanced EMI shielding characteristics, especially focusing on technologies and methods using supercritical CO2 (sCO2); continuing with the use of polymer foams as templates to synthesize carbon foams with improved EMI shielding performance for high use temperature applications; the recent strategy of combining different functional (nano)fillers to create hybrid nanofillers/nanohybrids to be used at lower amounts as conductive fillers in polymer foams; the control and selective distribution of the nanofillers in terms of favoring the formation of a more effective conductive network and hence promote the enhancement of the EMI SE; the very recent use of computational approaches to tailor the EMI shielding properties of composite foams; and the very trending possibility of creating cellular components with varied porous structures from these materials using 3D printing; to finish, some future perspectives are discussed.

Preprint ARTICLE | doi:10.20944/preprints202312.0136.v1

Impact of CytoSorb Hemoadsorption Therapy on Fluid Balance in Patients with Septic Shock

Klaus Kogelmann, Tobias Huebner, Matthias Drüner, Dominik Jarczak

Subject: Medicine And Pharmacology, Clinical Medicine Keywords: Inflammation; septic shock; CytoSorb; hemoadsorption; fluid balance; vasopressors; vascular barrier function; endothelial integrity

Online: 5 December 2023 (06:12:45 CET)

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Preprint REVIEW | doi:10.20944/preprints202311.1341.v1

The Breakup of Gas Bubbles by a Shock Wave: Brief Historical Background

Igor V. Minin, Oleg V. Minin

Subject: Physical Sciences, Applied Physics Keywords: shock wave; bubbles; cumulative jet; liquid; gas storage

Online: 22 November 2023 (07:30:25 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0902.v1

Non-symmetry in the Shock Refraction at a Closed Interface as a Recovery Mechanism

Anna Markhotok

Subject: Physical Sciences, Fluids And Plasmas Physics Keywords: Plasma Dynamics; Hypersonic flow; Shock waves; Shock refraction; Shock Recovery

Online: 14 November 2023 (10:40:41 CET)

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Preprint REVIEW | doi:10.20944/preprints202311.0811.v1

Severe Refractory Vasoplegic Shock Syndrome After OPCABG: Our Experience and Review of Literature

Beatrice Bacchi, Francesso Cabrucci, Bruno Chiarello, Aleksander Dokollari, Massimo Bonacchi

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: Vasoplegic Shock Syndrome; Off-pump CABG; Hydroxycobalamin

Online: 14 November 2023 (05:35:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0367.v1

Analysis of the Structure and Durability of Refractory Castables Impregnated with Sodium Silicate Glass

Jurgita Malaiškienė, Valentin Antonovič, Renata Boris, Andrius Kudžma, Rimvydas Stonys

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: refractory castable; impregnation; liquid sodium silicate glass; alkali resistance; physical and mechanical properties, thermal shock resistance

Online: 6 November 2023 (15:10:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0276.v1

Elevated Expression of HSP72 in the Prefrontal Cortex and Hippocampus of Rats Subjected to Chronic Mild Stress and Treated with Imipramine

Adam Bielawski, Agnieszka Zelek-Molik, Katarzyna Rafa-Zabłocka, Marta Kowalska, Piotr Gruca, Mariusz Papp, Irena Nalepa

Subject: Medicine And Pharmacology, Neuroscience And Neurology Keywords: chronic mild stress; depression; imipramine; heat shock protein; HSP90; inducible HSP90A; constitutive HSP90B; HSP70; inducible HSP72; constitutive HSC70

Online: 6 November 2023 (11:35:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0252.v1

A Study on the Impact of External Shocks on the Resilience of China’s Grain Supply Chain

Tao Zheng, Guiqian Zhao, Siwei Chu

Subject: Business, Economics And Management, Economics Keywords: resilience; grain supply chain; external supply shock; external cost shock; exchange rate volatility shock

Online: 3 November 2023 (12:56:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1889.v1

Reduction of Shock Wave Severity by Porous Media on a Two-Dimensional Obstacle in an Open Channel

Seyed Ehsan Hosseini, Omid Karimi

Subject: Engineering, Mechanical Engineering Keywords: compressible flow; numerical solution method; porous media; shock control; skin friction

Online: 30 October 2023 (10:12:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1702.v1

Research on the Shock Environment Characteristics of Marine Diesel Engine Based on a Large Floating Impact Platform

Yu Zhang, Jun Li, Chun hui Zhang, Wei Chen, Zhi peng Du, Xiao bin Li

Subject: Engineering, Marine Engineering Keywords: large-scale floating shock platform (LFSP); shock environments; underwater explosion; marine diesel engines; shock spectra

Online: 26 October 2023 (11:40:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1486.v1

Antiviral Efficacy of Heparan Sulfate and Enoxaparin Sodium against SARS-CoV-2: An In-Vitro/in-Silico Model

Virginia Fuochi, Salvatore Furnari, Giuseppe Floresta, Vincenzo Patamia, Chiara Zagni, Filippo Drago, Antonio Rescifina, Pio Maria Furneri

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: heparan sulfate; enoxaparin; coronavirus; SARS-CoV-2; ACE2, absorption inhibition; molecular docking

Online: 24 October 2023 (08:12:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1219.v1

Recycling of Industrial Waste as Soil Binding Additives—Effects on Soil Mechanical and Hydraulic Properties during Its Stabilisation Prior to Road Construction

Ksawery Kuligowski, Witold Waciński, Marek Zając, Włodzimierz Urbaniak, Małgorzata Olejarczyk, Waldemar Cyske, Paweł Kazimierski, Robert Tylingo, Szymon Mania, Adam Cenian

Subject: Environmental And Earth Sciences, Soil Science Keywords: road construction; soil stabilization; soil binders; soil compressive strength; soil capillary forces; frost resistance; waste additives; industrial waste; pyrolytic wax; emulsions; soil water absorption

Online: 20 October 2023 (11:01:31 CEST)

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In road construction, before applying an asphalt or concrete surface, the ground must be compacted and stabilized. There are two basic methods of soil stabilization: in situ and in a stationary node (ex-situ). The method of performing stabilization in place (in-situ) is the most frequently used method due to its convenience and lower price. The most popular type of binder for stabilization is a hydraulic binder (most often cement and various ashes). Such stabilization is performed at a depth of 10-50 cm, achieving the desired load-bearing parameters. In order to improve them, various chemical additives for stabilization are often used, such as ion exchange compounds, additives based on sulfuric acid, additives based on vinyl polymers or even organic additives using lignosulfonates. However, the use of such additives is associated with much greater costs and environmental burden, resulting in seeking for cheaper and equally effective alternatives. The win-win situation would be for instance recycling the problematic waste-based materials that on one hand are landfilled or impossible to recycle and on the other hand cause problems for the waste producers. Therefore, an interesting issue is the production of stabilization additives from various types of waste materials. As a result of the extensive testing of various waste-based materials blends with soil, the mechanical (compressive strength after 7 and 28 days) and hydraulic (capillary rise, water absorption, frost resistance) soil properties were measured. The optimization process led to obtaining additives compositions ensuring the best strengthening and sealing properties. These were for sandy soil: Pure foil (wax emulsion), Pure foil (wax emulsion) + waste sulphuric acid, RDF from waste tires (wax emulsion), Pure foil (wax emulsion) + “by-pass” waste ash + NaOHx2 and for clayey soil: Pure foil (wax emulsion) + NaOH, Pure foil (wax emulsion) + waste sulphuric acid, Tequant, Pure foil (wax emulsion).

Preprint REVIEW | doi:10.20944/preprints202310.1327.v1

HSF1 Inhibition: A Novel Anti-Cancer Strategy with Promise for Precision Oncology

Khanisyah Erza Gumilar, Yeh Chin, Ibrahim H. Ibrahim, Brahmana A. Tjokroprawiro, Jer-Yen Yang, Ming Zhou, Natalie R. Gassman, Ming Tan

Subject: Medicine And Pharmacology, Oncology And Oncogenics Keywords: HSF1; heat shock response; cellular stress; cancer stem cells; tumor microenvironment

Online: 20 October 2023 (10:26:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1287.v1

Innovations in Electrochemical Sensors for Lead Ion Detection: Applications in Wastewater Treatment and Cytotoxicity Assessment

Morris Kamel, Gehad Abd El-Fatah, Mohamed Zaky, Amal Zaher, Ahmed Farghali, Sarah I. Othman, Ahmed Allam, Hassan Ahmed Rudayni, Mohamed E. M. Hassouna, Rehab Mahmoud

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: lead ions (Pb+2); Zn-Fe LDH/PANI; Carbon paste electrode (CPE); differential pulse voltammetry (DPV); Zn/Mg/Fe LDH; Atomic absorption spectrophotometer (ASS); cytotoxicity

Online: 19 October 2023 (13:38:55 CEST)

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The requirement for developing tools capable of detecting and monitoring heavy metals (HMs) has recently taken on more significance due to worries about their toxic effect on human health and aquatic habitats. In this study, a simple electrochemical sensing carbon paste electrode (CPE) based on composite of Zinc/Iron layered double hydroxide (LDH) and polyaniline (PANI) was developed for the determination of lead ions in aquatic solutions. For this purpose, Zn-Fe LDH/PANI was prepared and characterized by Fourier transform infrared (FTIR), X ray diffraction (XRD), and scanning electron microscopy (SEM). Modified carbon electrode based Zn-Fe LDH/PANI was electrochemically characterized compared with unmodified electrode in FCN as a redox probe using cyclic voltammetry (CV). Thus, Zn-Fe LDH/PANI was utilized as sensing material for the electrochemical determination of lead ions using differential pulse voltammetry (DPV). Zn-Fe LDH/PANI/CPE show limits of detection (LOD) and quantification (LOQ) of 167.8 nM and 559.4 nM, respectively. Zn/Mg/Fe LDH was prepared using co-precipitation method and characterized by XRD, FTIR, SEM and BET, used for removal of Pb+2 ions. Removal process was investigated at different conditions as pH, metal ion concentrations, starting adsorbent dose at first and contact time. Zn/Mg/Fe LDH was evaluated as an effective adsorbent material for lead ions elimination in aquatic solutions, with capacity of adsorption 700 mg/g. The elimination of lead ions on Zn/Mg/Fe LDH fitted the pseudo first-order kinetics model and the isotherm was matched with Langmuir model. Studies revealed that the ideal removal conditions were pH = 5.0, an adsorbent mass of 0.05 g, and 20 ml of 50 ppm metal ion concentration at 60 min. The Zn-Fe LDH/PANI composite also showed potential anti-cancer properties against lung cancer cells (A549) while maintaining safety for normal lung fibroblast cells (WI-38). Collectively, advancements in electrochemical sensors offer promising solutions for lead ion detection, with wide-reaching applications in wastewater treatment and cytotoxicity assessment. These innovations have the potential to enhance environmental monitoring and public health safety.

Preprint ARTICLE | doi:10.20944/preprints202304.0487.v2

Agro-climatic Analysis for Agricultural Adaptation in Hungary

Kinga Biró, Erik Kovács

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: drought; shock; agro-climate; agriculture; precipitation

Online: 16 October 2023 (10:55:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0245.v1

New Insights into Flow for a Low-Bypass-Ratio Transonic Fan with Optimized Rotor

Mingjun Liu, Zhenjiu Zhang, Zhuoming Liang, Haibing Xiao, Huanlong Chen, Xianqing Yang, Changxiao Shao

Subject: Engineering, Aerospace Engineering Keywords: low-bypass-ratio transonic fan; aerodynamic optimization; vortex dynamics; secondary flow; shock wave

Online: 5 October 2023 (02:12:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0138.v1

Multi-Frequency Differential Absorption LIDAR (DIAL) System for Aerosol and Cloud Retrievals of CO2/H2O and CH4/H2O

Jasper R Stroud, Gerd A Wagner, David F Plusquellic

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: DIAL; differential absorption lidar; IPDA; integrated path differential absorption LIDAR; cloud aerosol retrievals

Online: 3 October 2023 (09:35:01 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.2122.v1

The Use of Spatially Multi-Component Plasma Structures and Combined Energy Deposition for High-Speed Flow Control. A Selective Review

Olga A. Azarova, Oleg V. Kravchenko

Subject: Engineering, Aerospace Engineering Keywords: supersonic/hypersonic flow control; energy source; bow shock wave; drag force; lift force; boundary layer; separation area; filamentary plasma; plasma actuator; Richtmyer–Meshkov instability; pulsing flow mode; damping flow pulsations

Online: 30 September 2023 (10:30:53 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.1583.v1

Host Defense Proteins and Peptides with Lipopolysaccharide-Binding Activity from Marine Invertebrates and their Therapeutic Potential in Gram-Negative Sepsis

Svetlana Ivanovna Bakholdina, Tamara Fedorovna Solov'eva, Gennadii Alexandrovich Naberezhnykh

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: lipopolysaccharide (LPS, endotoxin), LPS-binding proteins/peptides, host defence proteins/peptids, innate immune system, marine invertebrates, Gram-negative sepsis, endotoxic shock.

Online: 26 September 2023 (08:12:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1568.v1

Novel Testing Method for Absorbing Materials with Comparison of Efficiency and Gain

Feng Xu

Subject: Engineering, Electrical And Electronic Engineering Keywords: OTA antenna test; wave absorption; stealth material

Online: 25 September 2023 (05:14:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1544.v1

Graded Triply Periodic Minimal Surface Structures with Lightweight, High-Strength and Sound Absorption Produced by Laser Powder Bed Fusion

Mingkang Zhang, Chang Liu, Mingjian Deng, Yuhao Li, Jinwei Li, Di Wang

Subject: Physical Sciences, Acoustics Keywords: triply periodic minimal surface; porous structure; laser powder bed fusion; graded structure; sound absorption

Online: 25 September 2023 (04:47:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1310.v1

Finite Element Analysis of Cold-Formed Steel Stud Wall Subjected to Blast Loading and Validation Using Artificial Neural Network and Response Surface Methodology

Vengadesh Subramanian S.A., Umamaheswari Nambiappan

Subject: Engineering, Civil Engineering Keywords: cold-formed steel; blast load; stud wall; strain energy; artificial neural network (ANN); energy absorption

Online: 20 September 2023 (04:44:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1265.v1

Predictive Modeling and CIGS Integration for Multi-Junction Solar Cell Efficiency Enhancement

Ziani Zakarya, Mahdad Moustafa Yassine, Baghdadli Tewfik, Sekkal Mohammed Chakib, Bessenouci Mohammed Zakaria, Ghellai Nassera

Subject: Engineering, Other Keywords: Multijunction solar cells; IIIV semiconductors; TCAD simulation; cell optimization; predictive profiling; CIGS absorbers; spectral utilization; currentvoltage characteristics; external quantum efficiency; GaAs replacement; bottom junction; thin films; high efficiency; photovoltaics; epitaxial growth; stacked junctions; light absorption

Online: 19 September 2023 (07:48:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1118.v1

An Increase in HSF1 Expression Directs Human Mammary Epithelial Cells toward a Mesenchymal Phenotype

Natalia Vydra, Agnieszka Toma-Jonik, Patryk Janus, Katarzyna Mrowiec, Tomasz Stokowy, Magdalena Głowala-Kosińska, Damian Robert Sojka, Magdalena Olbryt, Wiesława Widłak

Subject: Biology And Life Sciences, Cell And Developmental Biology Keywords: epithelial-to-mesenchymal transition; heat shock transcription factor 1; HSF1 inhibitor; human mammary epithelial cells

Online: 18 September 2023 (08:51:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1008.v1

Tunable Helmholtz Resonators using Multiple Necks

Nikolaos M. Papadakis, Georgios E. Stavroulakis

Subject: Physical Sciences, Acoustics Keywords: Helmholtz resonator; multi-neck Helmholtz resonator; sound absorber; architectural acoustics; room acoustics; musical acoustics; finite element method; sound absorption; acoustic transmission

Online: 15 September 2023 (03:59:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1007.v1

Flux Growth and Characterization of Bulk InVO4 Crystals

Olesia Voloshyna, Mikhail V. Gorbunov, Daria Mikhailova, Andrey Maljuk, Silvia Seiro, Bernd Büchner

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: flux-growth; indium vanadate; XANES (X-ray absorption near edge spectroscopy); EXAFS (extended X-ray absorption fine structure)

Online: 14 September 2023 (11:43:28 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.0668.v1

Physiological Functions of Carbon Dots and Their Applications in Agriculture Production

Guohui Li, Jiwei Xu, Ke Xu

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: photosynthesis; nutrient and water absorption; abiotic stress resistance; yield; biosensor

Online: 11 September 2023 (10:11:28 CEST)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints202309.0655.v1

Temporary Mechanical Circulatory Support in Cardiogenic Shock Patients after Cardiac Procedures: Selection Algorithm and Weaning Strategies

Gaik Nersesian, Sascha Ott, Alexander Fardman, Pia Lanmueller, Daniel Lewin, Alexander Bernhardt, Fabian Emrich, Gloria Faerber, Gábor Szabó, Mehmet Oezkur, Bernd Panholzer, Sebastian Rojas Hernandez, Diyar Saeed, Bastian Schmack, Gregor Warnecke, Daniel Zimpfer, Herko Grubitzsch, Volkmar Falk, Evgenij Potapov

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: postcardiotomy cardiogenic shock; mechanical circulatory support; extracorporeal life support; microaxial flow pump; Impella

Online: 11 September 2023 (09:58:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.0264.v1

Optimization of the ANN model for Energy Consumption Prediction of Direct Fired Absorption Chiller for a Short-Term

Goopyo Hong, Namchul Seong

Subject: Engineering, Architecture, Building And Construction Keywords: ANN; energy consumption; optimization; direct fired absorption chiller; validation

Online: 5 September 2023 (11:28:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.2097.v1

Multivariate Analysis for Prediction of Splitting Tensile Strength in Concrete Paving Blocks

Vinicio Ramiro Benalcázar-Rojas, Wilman Jenny Yambay-Vallejo, Erick Patricio Herrera-Granda

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: Prediction of tensile splitting strength; quality in concrete paving blocks; density of the fresh paving block; water absorption of concrete paving blocks; weight of the fresh paving blocks

Online: 31 August 2023 (09:33:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.2030.v1

Simulation of Relaxation Processes in Hypersonic Flows with One-Temperature Non-Equilibrium Model

Anton Karpenko, Semen Tolstoguzov, Konstantin Volkov

Subject: Physical Sciences, Fluids And Plasmas Physics Keywords: aerodynamics; hypersonic flow; shock wave; physical and chemical processes; chemical kinetics; relaxation

Online: 30 August 2023 (08:54:09 CEST)

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Preprint REVIEW | doi:10.20944/preprints202308.1784.v1

Growing Evidence for LV Unloading in VA ECMO

Jan Soltes, Daniel Rob, Petra Kavalkova, Jan Bruthans, Jan Belohlavek

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: ecmo; impella; unloading; iabp; cardiogenic shock

Online: 25 August 2023 (07:24:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1593.v1

Cubic Nonlinearity of Graphene-Oxide Monolayer

Tikaram Neupane, Uma Poudyal, Bagher Tabibi, Wan-joong Kim, Felix Jaetae Seo

Subject: Physical Sciences, Optics And Photonics Keywords: One-photon; two-photon transition; Atomic layer; Nonlinear absorption; Nonlinear refraction

Online: 23 August 2023 (09:44:25 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202308.1523.v1

Correct and incorrect reporting of the principles of focused and radial extracorporeal shock wave therapy (fESWT and rESWT)

Leon Jokinen, Tobias Wuerfel, Christoph Schmitz

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: extracorporeal shock wave therapy, focused extracorporeal shock waves, radial extracorporeal shock waves, ESWT, rESWT, fESWT

Online: 22 August 2023 (09:03:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1460.v1

Trade Performance of Bangladesh during Covid-19 Pandemic: An Empirical Study using CGE Model

Farha Fatema, Mohammad Monirul Islam, Tania Rahman

Subject: Business, Economics And Management, Business And Management Keywords: Covid-19; trade performance; Bangladesh; CGE model; demand shock; trade disruptions

Online: 21 August 2023 (11:58:14 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202308.1410.v1

Altered Blood Molecular Markers of Cardiovascular Function in Rats After Intrauterine Hypoxia and Drug Therapy

Olena Popazova, Igor Belenichev, Oleh Yadlovskyi, Valentyn OKsenych, Aleksandr Kamyshnyi

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: prenatal hypoxia; cardioprotective; heat shock proteins; Angioli; L-arginine; Thiotriazoline; Mildronate; HSP70; HIF-1; eNOS

Online: 21 August 2023 (10:05:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1397.v1

Vibrational Effects on the Acoustic Performance of Multi-Layered Micro-Perforated Metamaterials

Cédric Maury, Teresa Bravo

Subject: Engineering, Mechanical Engineering Keywords: sound absorption; micro-perforates; panels vibration; global optimization

Online: 21 August 2023 (09:49:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1352.v1

Oral Iron Absorption of Ferric Citrate Hydrate and Hepcidin-25 in Hemodialysis Patients: A Prospective, Multicenter, Observational Riona-Oral Iron Absorption Trial

Naohisa Tomosugi, Yoshitaka Koshino, Chie Ogawa, Kunimi Maeda, Noriaki Shimada, Kimio Tomita, Shoichiro Daimon, Tsutomu Shikano, Kazuyuki Ryu, Toru Takatani, Kazuya Sakamoto, Satonori Ueyama, Daisuke Nagasaku, Masato Nakamura, Shibun Ra, Masataka Nishimura, Chieko Takagi, Yoji Ishii, Noritoshi Kudo, Shinsuke Takechi, Takashi Ishizu, Takamoto Yanagawa, Masamichi Fukuda, Yutaka Nitta, Takayuki Yamaoka, Taku Saito, Suzuko Imayoshi, Momoyo Omata, Joji Oshima, Akira Onozaki, Hiroaki Ichihashi, Yasuhisa Matsushima, Hisahito Takae, Ryoichi Nakazawa, Koichi Ikeda, Masato Tsuboi, Keiko Konishi, Shouzaburo Kato, Maki Ooura, Masaki Koyama, Tsukasa Naganuma, Makoto Ogi, Shigeyuki Katayama, Toshiaki Okumura, Shigemi Kameda, Sayuri Shirai

Subject: Medicine And Pharmacology, Urology And Nephrology Keywords: oral iron absorption; ferric citrate hydrate; hemodialysis; hepcidin-25; iron shift

Online: 18 August 2023 (11:20:29 CEST)

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Preprint REVIEW | doi:10.20944/preprints202308.0298.v2

Absorption of Light in Vertical III-V Semiconductor Nanowires for Solar Cell and Photodetector Applications

Nicklas Anttu

Subject: Physical Sciences, Applied Physics Keywords: III-V semiconductor; nanowire; absorption; solar cell; photodetector

Online: 17 August 2023 (07:53:02 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202308.1124.v1

An Optical Micro-nano fiber Sensor Monitoring Exhaled Carbon Dioxide Gas

Tuo Chen, Yuxia Song, Xue Wang, Shiya Zhang, Jian-Jun He, Mingyu Li

Subject: Physical Sciences, Optics And Photonics Keywords: respiratory carbon dioxide; absorption theory; micro-nano fiber; optical sensor

Online: 16 August 2023 (08:54:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0920.v1

Agaricus bisporus Extract (H2Oslim^®) Exerts an Anti-obesity Effect in High-Fat Diet-Induced Obese C57BL/6N Mice by Inhibiting Pancreatic Lipase-Mediated Fat Absorption

Hyungkeun Kim, Young Eun Jeon, So Mi Kim, Jae In Jung, Donghyeon Ko, Eun Ji Kim

Subject: Biology And Life Sciences, Food Science And Technology Keywords: agaricus bisporus; chitosan; polysaccharide; lipid absorption; pancreatic lipase; obesity

Online: 11 August 2023 (09:36:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0698.v1

Health Shock, Borrowing, and Rural Household Welfare: Evidence from China

Xinyu ZHANG

Subject: Business, Economics And Management, Economics Keywords: Health Shock, Credit, Rural Household Welfare, Sustainable Rural Devlopment, China Household Finance Survey

Online: 9 August 2023 (08:50:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0656.v1

Nonlinear Optical Absorption of Impurities in Hexagonal Quantum Wires: Electric and Magnetic Field Effects

Anna Sofía Giraldo-Neira, Tomas Sosa-Giraldo, Juan Alejandro Vinascos-Sánchez, Álvaro Luis Morales Aramburo, Carlos Alberto Duque Echeverri, Miguel Eduardo Mora-Ramos, Ricardo León Restrepo Arango

Subject: Physical Sciences, Condensed Matter Physics Keywords: intraband energy transitions; optical absorption coefficients; hexagonal quantum well wires; GaAs/AlGaAs; core/shell structure

Online: 8 August 2023 (11:20:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0325.v1

Breeding Substrate Containing Distillation Residues of Mediterranean Medicinal Aromatic Plants Modulates the Effects of Tenebrio molitor as Fishmeal Substitute on Blood Signal Transduction and WBC Activation of Gilthead Seabream (Sparus aurata)

Efthimia Antonopoulou, Markos Kolygas, Nikolas Panteli, Evangelia Gouva, Panagiota Kontogeorgiou, Konstantinos Feidantsis, Achileas Chatzopoulos, Konstantina Bitchava, Christos Zacharis, Eleftherios Bonos, Ιlias Giannenas, Ioannis Skoufos, Stefanos S. Andreadis, Georgios Skoulakis, Christos G. Athanassiou, Cosmas Nathanailides

Subject: Biology And Life Sciences, Life Sciences Keywords: Tenebrio molitor; gilthead sea bream; differential leukocyte count; MAPK signaling; heat shock proteins

Online: 3 August 2023 (10:48:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0221.v1

Microstructures in Shocked Quartz: Linking Nuclear Airbursts and Meteorite Impacts

Robert E. Hermes, Hans-Rudolf Wenk, James P. Kennett, Ted E. Bunch, Christopher R. Moore, Malcolm A. LeCompte, Gunther Kletetschka, A. Victor Adedeji, Kurt Langworthy, Joshua J. Razink, Valerie Brogden, Brian Van Devener, Jesus Paulo Perez, Randy Polson, Matt Nowell, Allen West

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: nuclear/atomic detonations; impact craters; shocked quartz; shock fractures; planar deformation features; planar fractures; tectonic deformation lamellae; electron backscatter diffraction (EBSD); transmission electron microscopy (TEM); cathodoluminescence (CL)

Online: 3 August 2023 (09:48:12 CEST)

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Preprint REVIEW | doi:10.20944/preprints202308.0090.v1

Graphs Defined on Rings: A Review

S Madhumitha, Sudev Naduvath

Subject: Computer Science And Mathematics, Discrete Mathematics And Combinatorics Keywords: Unitary Cayley Graphs; Euler Totient Cayley Graphs; Unitary Addition Cayley Graphs; Unit Graphs; Absorption Cayley graphs; Nilpotent Cayley Graphs; Zero-divisor Cayley Graphs; Mixed unitary Cayley Graphs; Divisor Cayley Graphs; Involutory Cayley Graphs; Quadratic Residue Cayley Graphs

Online: 2 August 2023 (02:24:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.2010.v1

The Effect of Cluster Nursing in ICU on Treatment Compliance and Intestinal Barrier Function in Patients with Refractory Septic Shock

Yun Chen, Yuefang Pan, Shunbo Xu

Subject: Medicine And Pharmacology, Surgery Keywords: care bundles; ICU; refractory septic shock; treatment compliance; intestinal barrier function

Online: 31 July 2023 (02:34:58 CEST)

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Objective: To evaluate the effect of care bundles on treatment compliance and intestinal barrier function in patients with refractory septic shock in the intensive care units (ICUs). Methods: In this retrospective study, the clinical data of 94 patients with refractory septic shock admitted to our hospital between June 2020 and April 2022 were collected. Patients with routine nursing were included in the routine group, and those with care bundles were assigned to the care bundles group, with 47 cases in each group. Outcome measures included nursing efficiency, treatment compliance, sequential organ failure assessment (SOFA) score, acute physiology and chronic health evaluation (APACHE II) score, intestinal barrier function, inflammation factor level, treatment outcome and complications. Results: Care bundles resulted in significantly higher nursing efficiency and treatment compliance versus routine care (P<0.05). Patients receiving care bundles showed significantly higher SOFA scores and APACHE II scores than those receiving routine care (P<0.05). Intestinal fatty-acid binding protein (I-FABP), diamine oxidase (DAO), lactate, endotoxin, and intestinal dysfunction scores in the care bundles group were significantly lower than those in the conventional group after treatment (P<0.05). Care bundles were associated with significantly lower levels of procalcitonin (PCT) and hypersensitive C-reactive protein (hsCRP), shorter time to symptom relief, ICU treatment time, and duration of mechanical ventilation, and lower 28-d morbidity and mortality versus routine care (P<0.05). Patients in the care bundles group had a significantly lower incidence of complications than those in the routine group (P<0.05). Conclusion: Care bundles effectively enhance treatment compliance, improve intestinal barrier function and treatment outcomes, reduce the inflammatory response, and decrease the risk of SOFA score, APACHE II score, and complications in patients with refractory septic shock.

Preprint ARTICLE | doi:10.20944/preprints202307.1799.v1

Polydeoxyribonucleotide and Shock Wave Therapy Sequence Efficacy in Regenerating Immobilized Rabbit Calf Muscles

Yoon-Jin Lee, Yong Suk Moon, Dong Rak Kwon, Sung Cheol Cho, Eun-Ho Kim

Subject: Medicine And Pharmacology, Medicine And Pharmacology Keywords: Muscle atrophy; Polydeoxyribonucleotides; Extracorporeal shock wave therapy; Muscle regeneration; Rabbit models

Online: 26 July 2023 (10:50:58 CEST)

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Objective: The main purpose of the study is to investigate the combined effects of polydeoxyribonucleotide (PDRN) and extracorporeal shock wave therapy (ESWT) sequences on the regenerative processes in atrophied animal muscles. Methods: Thirty male New Zealand rabbits, aged 12 weeks, were divided into five groups: normal saline, PDRN, ESWT, PDRN injection before ESWT, and PDRN injection after ESWT. Following 2 weeks of cast immobilization, the respective treatments were administered to the atrophied calf muscles. Radial ESWT was performed twice weekly. The evaluation included measurements of calf circumference, tibial nerve compound muscle action potential (CMAP), and gastrocnemius (GCM) muscle thickness after 2 weeks of treatment. Histological and immunohistochemical staining, as well as Western blot analysis, were conducted 2 weeks post-treatment. Staining intensity and extent were assessed using semi-quantitative scores. Results: Groups 4 and 5 demonstrated significantly greater calf muscle circumference, GCM muscle thickness, tibial nerve CMAP, and GCM muscle fiber cross-sectional area (types I, II, and total) than in the remaining three groups (p < 0.05), while they did not did not differ significantly in these parameters. Groups 2 and 3 showed the higher values for all the observations compared to group 1 (p < 0.05). Group 4 had the greatest ratio of vascular endothelial growth factor (VEGF) to platelet endothelial cell adhesion molecule-1 (PECAM-1) in the gastrocnemius muscle fibers than in the other four groups (p < 0.05). Western blot analysis revealed significantly higher expression of angiogenesis cytokines in groups 4 and 5 than in the remaining (p < 0.05). Conclusion: The combination of ESWT and PDRN injection demonstrated superior regenerative efficacy for atrophied calf muscle tissue in rabbit models than these techniques alone or saline. Particularly, administering ESWT after PDRN injection yielded the most favorable outcomes in specific parameters.

Preprint ARTICLE | doi:10.20944/preprints202307.1515.v1

Excited-State Dynamics Leading either to Triplet Formation or Coordinative Expansion following Photolysis of Cu(II)-5,10,15,20-meso-tetrakis(phenyl)porphyrin or Cu(II)-5,10,15,20-meso-tetrakis(N-methylpyridium-4-yl)porphyrin: A DFT, TD-DFT, Luminescence and Femtosecond Time-Resolved Absorbance Study

Ross McGarry, Lazaros Varvarezos, Mary T. Pryce, Conor Long

Subject: Chemistry And Materials Science, Inorganic And Nuclear Chemistry Keywords: Porphyrin; Copper; Photophysics; DFT; TD-DFT; Luminescence; Transient Absorption; Femptosecond

Online: 24 July 2023 (10:30:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1594.v1

The Effect of Cluster Nursing in ICU on Treatment Compliance and Intestinal Barrier Function in Patients with Refractory Septic Shock

Yun Chen, Yuefang Pan, Shunbo Xu

Subject: Medicine And Pharmacology, Surgery Keywords: Care bundles; ICU; Refractory septic shock; Treatment compliance; Intestinal barrier function

Online: 24 July 2023 (10:30:31 CEST)

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Objective: To evaluate the effect of care bundles on treatment compliance and intestinal barrier function in patients with refractory septic shock in the intensive care units (ICUs). Methods: In this retrospective study, the clinical data of 94 patients with refractory septic shock admitted to our hospital between June 2020 and April 2022 were collected. Patients with routine nursing were included in the routine group, and those with care bundles were assigned to the care bundles group, with 47 cases in each group. Outcome measures included nursing efficiency, treatment compliance, sequential organ failure assessment (SOFA) score, acute physiology and chronic health evaluation (APACHE II) score, intestinal barrier function, inflammation factor level, treatment outcome and complications. Results: Care bundles resulted in significantly higher nursing efficiency and treatment compliance versus routine care (P<0.05). Patients receiving care bundles showed significantly higher SOFA scores and APACHE II scores than those receiving routine care (P<0.05). Intestinal fatty-acid binding protein (I-FABP), diamine oxidase (DAO), lactate, endotoxin, and intestinal dysfunction scores in the care bundles group were significantly lower than those in the conventional group after treatment (P<0.05). Care bundles were associated with significantly lower levels of procalcitonin (PCT) and hypersensitive C-reactive protein (hsCRP), shorter time to symptom relief, ICU treatment time, and duration of mechanical ventilation, and lower 28-d morbidity and mortality versus routine care (P<0.05). Patients in the care bundles group had a significantly lower incidence of complications than those in the routine group (P<0.05). Conclusion: Care bundles effectively enhance treatment compliance, improve intestinal barrier function and treatment outcomes, reduce the inflammatory response, and decrease the risk of SOFA score, APACHE II score, and complications in patients with refractory septic shock.

Preprint ARTICLE | doi:10.20944/preprints202307.1488.v1

Theoretical Study of Structure and Photophysics of Homologous Series of Bis(arylydene)cycloalkanones

Roman O. Starostin, Alexandra Ya. Freidzon, Sergey P. Gromov

Subject: Chemistry And Materials Science, Theoretical Chemistry Keywords: bis(arylydene)cycloalkanone dyes; photophysical properties; photochemical properties; absorption; luminescence; trans-cis isomerization; quantum chemistry; density functional theory; potential energy surface; conical intersection

Online: 21 July 2023 (08:49:19 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202307.0711.v1

Rare Fatal Case of Purpura Fulminans with Acute Kidney Injury, Due to Pneumococcal Sepsis in Children, Associated with Multiorgan Failure

Maria Madalina Merisescu, Gheorghita Jugulete, Pavelescu Carmen, Monica Luminita Luminos

Subject: Medicine And Pharmacology, Pediatrics, Perinatology And Child Health Keywords: Streptococcus pneumoniae; purpura fulminans; sepsis; shock; children; Acute Kidney Injury; multiple organ and system failures

Online: 11 July 2023 (10:41:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0629.v1

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

George N. Hotos

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: Microalgae culture; Pigments; Absorption spectrum; Dunaliella; Anabaena

Online: 10 July 2023 (12:10:39 CEST)

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