Abdelkader Ali-Nehari

• PhD
• Professor at Université IBN Khaldoun Tiaret

Plant extracts offer an alternative approach to safeguarding stored food products. Our research is focused on assessing the insecticidal properties of aqueous and ethanolic extracts containing bioactive compounds obtained from two species of Azolla; A. pinnata and A. Microphylla against pests that affect stored food items. Two drying processes were...

Many plants' phytochemical composition and pharmacological activities offer medicinal potential for sci-entific research. This work aims to assess the bioactivities of Azolla pinnata extracts by evaluating their antioxidant, anticancer, antibacterial, and antifungal properties. Ultrasonic pretreatment of the samples was carried out to increase the...

This review provides a comprehensive exploration of factors contributing to sudden death (SD) in ruminants, focusing on cattle, sheep, and goats. The definition of unexpected death varies based on the farming system. In intensive systems, constant surveillance enables rapid detection of diseases, while in extensive systems, irregular checks may res...

Plant extracts offer an alternative approach to safeguarding stored food products. Our research is focused on assessing the insecticidal properties of aqueous and ethanolic extracts containing bioactive compounds obtained from two species of Azolla; A. pinnata and A. Microphylla against pests that affect stored food items. Two drying processes were...

This review provides a comprehensive exploration of factors contributing to sudden death (SD) in ruminants, focusing on cattle, sheep, and goats. The definition of unexpected death varies based on the farming system. In intensive systems, constant surveillance enables rapid detection of diseases, while in extensive systems, irregular checks may res...

The aim of our work is to study the dyeing properties of extracts from natural sources such as Papaver rhoeas by modifying the conditions of the dyeing process, choosing other substrates that could be pretreated by innovative and environmentally friendly processes. The results obtained show a fairly high fixation of the extracts on the natural and...

We investigated the thermal stability of polyphenols and fatty acids from Laminaria japonica powder by subcritical water hydrolysis among the range of the experimental conditions. The experiment was carried out at temperatures and pressures ranging from 200 to 280 °C and 13 to 60 bar, respectively for 28 to 42 min. Polyphenol and fatty acids in hyd...

In this study, Enzyme activities of krill were characterized before and after lipid extraction by supercritical carbon dioxide (SC-CO2) and organic solvent, n-hexane and acetone. Krill SC-CO2 extraction was performed under the conditions of temperature range from 35 to 45 °C and pressure, 150–250 bar for 2.5 h with a constant flow rate of 22 g/min....

Purification of phospholipids (PL) from the Antarctic krill (Euphausia superba) using a two-step extraction process has been investigated. Using supercritical carbon dioxide (SC-CO2) extraction with optimal extractions conditions of 45 °C, 25MPa, and CO2 flow rate of 22 g/min, most of the neutral lipids were extracted. PC, PE and PI were then extra...

The aim of this study was the determination of the best experimental conditions for the production of useful materials such as amino acids by subcritical water hydrolysis from supercritical carbon dioxide extracted krill residues and to compare the results with raw krill. Subcritical water hydrolysis efficiency from raw and de-oiled krill was exami...

Krill oil including astaxanthin was extracted using supercritical CO2 and hexane. The effects of different parameters such as pressure (15 to 25MPa), temperature (35 to 45 °C), and extraction time, were investigated. The flow rate of CO2 (22 gmin−1) was constant for the entire extraction period of 2.5 h. The maximum oil yield was found at higher ex...