Résumé: Jben is a popular traditional cheese in Algeria and North Africa, usually made from raw rumi- nant's milk, especially cow. Artisanal production methods are still used in many regions, espe- cially during the abundant milk production season. This study aimed to evaluate and compare the effect of various coagulants (of animal and plant origin) on physicochemical parameters, fatty acids (FAs) profile and lipid quality indices in the traditional fresh cheese "Jben". These pa- rameters were analyzed in Jben samples made with vegetable rennet (CVR) from Cynara cardun- culus, which were compared with Jben cheeses made using lamb rennet (CLR). The physico- chemical characterization showed that pH, titratable acidity, dry matter, fat, and protein con- tents were 6.19, 92.5 °D, 43.7 g/100 g, 23.4 g/100 g and 15.2 g/100 g cheese, respectively for CVR; and 5.21, 80.3 °D, 50.1 g/100 g, 20.6 g/100 g and 13.8 g/100 g cheese, respectively for CLR. The FAs composition was determined using gas chromatography-mass spectrometry (GC- MS) method. For CLR, FAs comprised 0.09–28.8% saturated fatty acids (SFAs), 0.85–27.68% monounsaturated fatty acids (MUFAs), and 3.22% of polyunsaturated fatty acids (PUFAs); whereas FAs of CVR included 0.22–27.81% SFAs, 1.10–28.16% MUFAs, and 3.07% PUFAs. The predominant FAs identified in all cheeses were C16:0, C18:0 and C18:1(9), with 28.80%, 13.37%, and 27.68% of total FAs, respectively for CLR, and 27.81%, 13.07%, and 28.16%, re- spectively for CVR. The lowest level of SFAs was observed in CVR, which had the most benefi- cial health indices with atherogenicity index (2.19), thrombogenicity index (2.91), desirable fatty acid ratio (49.40%) and high hypocholesterolemic/hypercholesterolemic fatty acid ratio (0.72).

Résumé: Jben is a popular traditional cheese in Algeria and North Africa, usually made from raw rumi- nant's milk, especially cow. Artisanal production methods are still used in many regions, espe- cially during the abundant milk production season. This study aimed to evaluate and compare the effect of various coagulants (of animal and plant origin) on physicochemical parameters, fatty acids (FAs) profile and lipid quality indices in the traditional fresh cheese "Jben". These pa- rameters were analyzed in Jben samples made with vegetable rennet (CVR) from Cynara cardun- culus, which were compared with Jben cheeses made using lamb rennet (CLR). The physico- chemical characterization showed that pH, titratable acidity, dry matter, fat, and protein con- tents were 6.19, 92.5 °D, 43.7 g/100 g, 23.4 g/100 g and 15.2 g/100 g cheese, respectively for CVR; and 5.21, 80.3 °D, 50.1 g/100 g, 20.6 g/100 g and 13.8 g/100 g cheese, respectively for CLR. The FAs composition was determined using gas chromatography-mass spectrometry (GC- MS) method. For CLR, FAs comprised 0.09–28.8% saturated fatty acids (SFAs), 0.85–27.68% monounsaturated fatty acids (MUFAs), and 3.22% of polyunsaturated fatty acids (PUFAs); whereas FAs of CVR included 0.22–27.81% SFAs, 1.10–28.16% MUFAs, and 3.07% PUFAs. The predominant FAs identified in all cheeses were C16:0, C18:0 and C18:1(9), with 28.80%, 13.37%, and 27.68% of total FAs, respectively for CLR, and 27.81%, 13.07%, and 28.16%, re- spectively for CVR. The lowest level of SFAs was observed in CVR, which had the most benefi- cial health indices with atherogenicity index (2.19), thrombogenicity index (2.91), desirable fatty acid ratio (49.40%) and high hypocholesterolemic/hypercholesterolemic fatty acid ratio (0.72).

Résumé: Abamectin is a broad spectrum highly effective acaricide, insecticide, and antiparasitic agent. Studies about the microbial degradation of abamectin are still rare and only three abamectin-degrading bacterial strains were isolated until now. In this paper, we reported the isolation and molecular characterization of bacterial strains isolated from three soils located in eastern Algeria, and the evaluation of their ability to grow in the presence of abamectin. Out of a total of 48 Gram negative and Gram positive bacterial strains identified, seven strains were able to develop on agar in the medium of mineral salt different concentrations of the tested insecticide. The four bacteria showing the best growth capacity were identified as being Pseudomonas mediterranea isolate PSB47, Pseudomonas sp. OX1, Pseudomonas migulae strain OKB3, and Pseudomonas sp. clone 6A4 and were tested for their ability to grow in the presence of abamectin as the only energy and carbon sources. In general way, these strains showed a slow but a significant growth visualized by the monitoring of absorbance at 600 nm, suggesting they could be used for bioremediation of polluted soil with abamectin.

Résumé: Pesticides incorporate a broad spectrum of chemicals, including insecticides, fungicides, molluscicides, rodenticides, nematicides, plant growth regulators, weedicides, etc. (Aktar, Sengupta & Chowdhury, 2009). The increasing exponential growth of the world’s population is generating a huge use of pesticides in the world to fulfill the augmenting needs for food and fibers (Foong et al., 2020). Agricultural yield has been rising due to the application of pesticides, controlling pests, diseases and helping to keep many dreaded diseases away from society (Naik & Prasad, 2006). However, the overuse of pesticides is proving to be one of the major obstacles to sustainable agricultural production (Agarwal & Pandey, 2017). At present, organophosphates (OPs) are the most widely used pesticides in agriculture due to their lower persistence in the environment and higher efficacy compared to organochlorine and carbamate pesticides

Résumé: East coast of Algeria suffers from several types of pollution, mainly hydrocarbons. The hydrocar- bon-based bacteria of the littoral were investigated. 53 indigenous strains were isolated, identified ac- cording to morphological and biochemical nature. Dietzia sp. CNJ898 PLO4 and Vibrio alginolyticus PB-WC 11099 were selected for growth tests in the presence of monoaromatic hydrocarbons as a sole source of carbon and energy and total hydrocarbons at the end of growth. The results showed that both strains used monoaromatics to grow. The total hydrocarbons determined after growth showed that all mon- oaromatics were biodegraded with different rates. The maximum rate was obtained with Dietzia sp. in the presence of xylene with 4.33 mg C/dm3 at the end of the process, followed by toluene with a level of 5.07 mg C/dm3 and 5.60 mg C/dm3 in the presence of Vibrio alginolyticus. The lowest degradation rate was obtained in the presence of benzene with Dietzia sp. with 15 mg C/dm3 compared to the control, which was 27 mg C/dm3 at the beginning of growth. The results obtained showed that both selected strains assimilated the monoaromatics tested and could be used for the bioremediation of the polluted littoral.