Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Onopordum nervosum ssp. platylepis Flowers as a Promising Source of Antioxidant and Clotting Milk Agents: Behavior of Spontaneous and Cultivated Plants under Different Drying Methodologies

Ismahen Essaidi
,
Najla Dhen
ORCID logo ,
Ghada Lassoued
,
Rania Kouki
ORCID logo ,
Faouzi Haouala
* ORCID logo ,
Abdulrahman Mohammed Alhudhaibi
ORCID logo ,
Hassan Ahmed Alrudayni
ORCID logo ,
Bouthaina Dridi Almohandes
Version 1 : Received: 14 September 2023 / Approved: 15 September 2023 / Online: 15 September 2023 (11:22:31 CEST)

A peer-reviewed article of this Preprint also exists.

Essaidi, I.; Dhen, N.; Lassoued, G.; Kouki, R.; Haouala, F.; Alhudhaibi, A.M.; Alrudayni, H.A.; Dridi Almohandes, B. Onopordum nervosum ssp. platylepis Flowers as a Promising Source of Antioxidant and Clotting Milk Agents: Behavior of Spontaneous and Cultivated Plants under Different Drying Methodologies. Processes 2023, 11, 2962. Essaidi, I.; Dhen, N.; Lassoued, G.; Kouki, R.; Haouala, F.; Alhudhaibi, A.M.; Alrudayni, H.A.; Dridi Almohandes, B. Onopordum nervosum ssp. platylepis Flowers as a Promising Source of Antioxidant and Clotting Milk Agents: Behavior of Spontaneous and Cultivated Plants under Different Drying Methodologies. Processes 2023, 11, 2962.

Abstract

This study aims to evaluate the effect of different drying methodologies (room, microwave, convective, oven and freeze-drying) on the chemical composition, the microbiological quality of extracts and the biological activities namely clotting milk and antioxidant activities for both spontaneous and cultivated Onopordum nervosum ssp. platylepis. The results showed that the drying methodology has significantly affected the phenolic composition. Freeze dried flowers showed the best amounts of total phenols, flavonoids and condensed tannins followed by the microwave dried flowers. However, the latest presented the lowest protein content. Finally, the biological activities were significantly dependent on the used drying process. The effective concentration EC50 values let to classify the samples according to their decreasing power to inhibit DPPH free radicals: dryer<oven<room <microwave<freeze-drying. The drying process significantly affected the clotting milk activity, freeze dried flowers showed the highest activity. All the obtained results do not reveal a significant difference between cultivated and spontaneous plants.

Keywords

Onopordum nervosum ssp. platylepis; spontaneous plant; cultivated plant; drying; chemical composition; clotting milk activity; antioxidant activity

Subject

Biology and Life Sciences, Horticulture

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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