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Digital Sustainable Marketing and Green Consumer Choices: The Mediating Roles of Green Perceived Value and Green Skepticism in Saudi Arabia
Amr Noureldin
,Fatma Alkhofaily
Posted: 22 December 2025
Consciousness as 4-Manifold Painlevé V Dynamics: From Quantum Topology to Classical Gamma Oscillations
Michel Planat
Posted: 22 December 2025
New SPRi Biosensors for Simultaneous Detection of Tau Protein Isoforms—The Importance of The ptau181/Total Tau Ratio in Alzheimer's Disease
Zuzanna Zielinska
,Ewa Gorodkiewicz
Tau protein is a nonspecific marker of neurodegeneration, and its phosphorylated form, ptau-181, is specifically associated with Alzheimer's disease (AD). Calculating the ratio of the phosphorylated form to total tau protein can help distinguish AD from other tauopathies or neurodegeneration, as well as reduce the impact of individual differences in total tau protein levels. This also allows for monitoring and comparing the dynamics of changes within the same patient. For this purpose, two SPRi biosensors were constructed, sensitive to the proteins described: total tau and ptau-181 for plasma determinations. The use of these biosensors requires prior sensor validation, during which specific parameters of the analytical method are established. A study of the optimal concentration of the receptor layer in which particular antibodies were immobilized found that the optimal concentration for total tau protein determinations was 1000 ng/mL. For ptau-181, it was 90 ng/mL. Biosensor layer formation was confirmed by analysis over a wide angle range, which enabled the generation of SPR curves. The dynamic range of the sensors is 1–50 pg/mL for total tau and 1–100 pg/mL for ptau-181. The limits of detection are 0.18 pg/mL and 0.037 pg/mL, respectively. Low standard deviation (SD) and coefficient of variation (CV) values indicate good precision and accuracy of the results obtained using the SPRi biosensors. Specificity testing confirmed that no interferents influenced the assay. The method is therefore suitable for researching biological materials, such as blood plasma. Proteins were thus measured in the blood plasma of AD patients and controls. Statistical analysis revealed significant differences in the concentrations of tau and ptau-181 protein in both groups. The calculated ptau/total tau ratio for both sample groups also demonstrated high statistical significance. This suggests that a high ratio may be characteristic of AD. However, more extensive analysis is needed to obtain cutoff values. The ROC curves indicate that both biosensors have good diagnostic utility, with lower specificity for total tau.
Tau protein is a nonspecific marker of neurodegeneration, and its phosphorylated form, ptau-181, is specifically associated with Alzheimer's disease (AD). Calculating the ratio of the phosphorylated form to total tau protein can help distinguish AD from other tauopathies or neurodegeneration, as well as reduce the impact of individual differences in total tau protein levels. This also allows for monitoring and comparing the dynamics of changes within the same patient. For this purpose, two SPRi biosensors were constructed, sensitive to the proteins described: total tau and ptau-181 for plasma determinations. The use of these biosensors requires prior sensor validation, during which specific parameters of the analytical method are established. A study of the optimal concentration of the receptor layer in which particular antibodies were immobilized found that the optimal concentration for total tau protein determinations was 1000 ng/mL. For ptau-181, it was 90 ng/mL. Biosensor layer formation was confirmed by analysis over a wide angle range, which enabled the generation of SPR curves. The dynamic range of the sensors is 1–50 pg/mL for total tau and 1–100 pg/mL for ptau-181. The limits of detection are 0.18 pg/mL and 0.037 pg/mL, respectively. Low standard deviation (SD) and coefficient of variation (CV) values indicate good precision and accuracy of the results obtained using the SPRi biosensors. Specificity testing confirmed that no interferents influenced the assay. The method is therefore suitable for researching biological materials, such as blood plasma. Proteins were thus measured in the blood plasma of AD patients and controls. Statistical analysis revealed significant differences in the concentrations of tau and ptau-181 protein in both groups. The calculated ptau/total tau ratio for both sample groups also demonstrated high statistical significance. This suggests that a high ratio may be characteristic of AD. However, more extensive analysis is needed to obtain cutoff values. The ROC curves indicate that both biosensors have good diagnostic utility, with lower specificity for total tau.
Posted: 22 December 2025
Twisting Paths: The Paradox of Fiber Branching in Muscle Regeneration
Leonit Kiriaev
,Kathryn N. North
,Stewart I. Head
,Peter J. Houweling
Posted: 22 December 2025
Rapid Phylogenomic Analysis of Thousands Outbreak‐Causing Viral Genomes Using Covary
Marvin I. De los Santos
Rapid phylogenomic analysis is essential for outbreak surveillance and large-scale viral comparative genomics, yet conventional alignment-based workflows remain computationally intensive and difficult to deploy at scale. Covary is a computational framework designed for large-scale biological sequence analysis. It is a translation-aware, alignment-free machine learning framework that encodes genomic information into biologically informed vector representations, enabling efficient genome-scale comparison without multiple sequence alignment (MSA). Here, Covary was applied to thousands-scale analysis of outbreak-causing viral genomes to assess its scalability and biological resolution. A total of 4,000 complete genomes of SARS-CoV-2, dengue virus, measles virus, and alphainfluenza virus were retrieved from the NCBI Viral Genomes Resource, of which 3,831 passed quality filtering and were analyzed using Covary. Results showed that Covary rapidly processed all genomes and consistently grouped sequences according to expected taxonomic assignments and known ingroup structure, including SARS-CoV-2 Pango lineages, dengue virus subtypes, measles virus geographic origin, and alphainfluenza virus clades. Covary completed the analysis in 45 minutes on free-tier Google Colab, inferring genome-wide relationships using modest computational resources. These results demonstrate that Covary enables rapid, alignment-free phylogenomic analysis of thousands of outbreak-causing viral genomes without requiring advanced computational infrastructure. In conclusion, Covary represents a scalable, deploy-ready machine learning pipeline for genome-informed outbreak surveillance and monitoring systems.
Rapid phylogenomic analysis is essential for outbreak surveillance and large-scale viral comparative genomics, yet conventional alignment-based workflows remain computationally intensive and difficult to deploy at scale. Covary is a computational framework designed for large-scale biological sequence analysis. It is a translation-aware, alignment-free machine learning framework that encodes genomic information into biologically informed vector representations, enabling efficient genome-scale comparison without multiple sequence alignment (MSA). Here, Covary was applied to thousands-scale analysis of outbreak-causing viral genomes to assess its scalability and biological resolution. A total of 4,000 complete genomes of SARS-CoV-2, dengue virus, measles virus, and alphainfluenza virus were retrieved from the NCBI Viral Genomes Resource, of which 3,831 passed quality filtering and were analyzed using Covary. Results showed that Covary rapidly processed all genomes and consistently grouped sequences according to expected taxonomic assignments and known ingroup structure, including SARS-CoV-2 Pango lineages, dengue virus subtypes, measles virus geographic origin, and alphainfluenza virus clades. Covary completed the analysis in 45 minutes on free-tier Google Colab, inferring genome-wide relationships using modest computational resources. These results demonstrate that Covary enables rapid, alignment-free phylogenomic analysis of thousands of outbreak-causing viral genomes without requiring advanced computational infrastructure. In conclusion, Covary represents a scalable, deploy-ready machine learning pipeline for genome-informed outbreak surveillance and monitoring systems.
Posted: 22 December 2025
Ultra-Low-Power Energy Harvesters for IoT-Based Germination Systems: A Decision Framework Using Multi-Criteria Analysis
Daniel Aguilar-Torres
,Enrique García-Gutiérrez
,Omar Jiménez-Ramírez
,Eliel Carvajal-Quiroz
,Rubén Vázquez-Medina
Posted: 22 December 2025
Long Term Atmospheric Corrosion of Magnesium Alloys: Influence of Aluminium Content
Dominique Thierry
,Dan Persson
,Nathalie LeBozec
Posted: 22 December 2025
Timeless Projection and Counterspace: Why Undecidability Does Not Preclude Simulation
Henry Arellano-Peña
Posted: 22 December 2025
Tuning Optical Absorption and Device Performance in P3HT:PCBM Organic Solar Cells Using Annealed Silver Thin Films
Alaa Y. Mahmoud
Posted: 22 December 2025
Refinement and Validation of an Artificial Intelligence Pipeline for Robust Greater Caribbean Manatee Detection and Acoustic Individual Counting
Fabricio Quirós-Corella
,Athena Rycyk
,Beth Brady
,Priscilla Cubero-Pardo
Posted: 22 December 2025
Towards Scalar-Field Actions in General Relativity from a Maximum-Entropy Displacement Ensemble
Fredrick Michael
Posted: 22 December 2025
Predicting Technological Trends and Effects Enabling Large-Scale Supply Drones
Keirin John Joyce
,Mark Hargreaves
,Jack Amos
,Morris Arnold
,Matthew Austin
,Benjamin Le
,Keith F. Joiner
,Vincent R. Daria
,John Young
Posted: 22 December 2025
Mitochondrial DNA Instability and Neuroinflammation: Connecting the Dots Between Base Excision Repair and Neurodegenerative Disease
Magan N. Pittman
,Mary Beth Nelsen
,Marlo K. Thompson
,Aishwarya Prakash
Posted: 22 December 2025
Effects of Climate Change on the Gametogenic Development of a Population of Grooved Carpet Shell Clam (Ruditapes decussatus, Linnaeus, 1758) in the Baldaio Lagoon (N.W. Spain)
Diana Llamazares
,Susana Nóvoa
,Justa Ojea
,Antonio J. Pazos
,M. Luz Pérez-Parallé
Posted: 22 December 2025
Urban Land Cover Mapping Enhanced with LiDAR Canopy Height Data to Quantify Urbanisation in an Arctic City: A Case Study of the City of Tromsø, Norway, 1984–2024
Liliia Hebryn-Baidy
,Gareth Rees
,Sophie Weeks
,Vadym Belenok
Posted: 22 December 2025
ContextualCLIP: A Context-Aware and Multi-Grained Fusion Framework for Few-Shot Ultrasound Anomaly Analysis
Yao-Tian Chian
,Yuxin Zhai
Posted: 22 December 2025
Therapeutic Potential and Safety of Intravenous ARSA-Overexpressing Mesenchymal Stem Cells in a Porcine Study of Metachromatic Leukodystrophy
Ayupova A.I.
,Fattakhova A.A.
,Solovyeva V.V
,Mukhamedshina Y.O.
,Rizvanov A.A.
Posted: 22 December 2025
Causal Representation Learning for Robust and Interpretable Audit Risk Identification in Financial Systems
Jingjing Li
,Qingmiao Gan
,Ruibo Wu
,Chen Chen
,Ruoyi Fang
,Jianlin Lai
Posted: 22 December 2025
On Lexicographic and Colexicographic Orders and the Mirror (Left-Recursive) Reflected Gray Code for m-ary Vectors
Valentin Penev Bakoev
Posted: 22 December 2025
Dietary Carboxymethyllysine: Short-Term Intake Reduction in Patients with Type 2 Diabetes Mellitus and Coronary Artery Disease
Karen Lika Kuwabara
,Nathalia Ferreira de Oliveira Faria
,Dalila Pinheiro Leal
,Gustavo Henrique Ferreira Gonçalinho
,Rosana Aparecida Manólio Soares Freitas
,Fatima Rodrigues Freitas
,Elizabeth Aparecida Ferraz da Silva Torres
,Celia Maria Cassaro Strunz
,Raul Cavalcante Maranhão
,Luiz Antonio Machado César
+1 authors
Posted: 22 December 2025
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