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This study examines the development of a new green and eco-friendly formulation derived from Opuntia dillenii seed oil (labeled as FOD) and its application as a corrosion inhibitor to protect iron which is subject to corrosion phenomena that become important especially in acidic environments as acid rain. Physicochemical properties and fatty acid analysis of Opuntia dillenii seed oil were performed and they demonstrated that the oil is a major source of unsaturated fatty acids, in particular linoleic acid, with a percentage of 73.388%. Corrosion inhibition effect of FOD was studied by gravimetric methods, electrochemical measurements, and scanning electron microscopy coupled with elemental analysis (SEM/EDX). Obtained results confirmed that FOD behaves as a good mixed corrosion inhibitor with predominant anodic activity. Inhibition efficiency of FOD is more important when the concentration of FOD and the immersion time increase, reaching values up to 99%. FOD forms a barrier layer on the surface of the iron, and thereby minimizes the contact area between the metal surface and the corrosive solution. The adsorption behavior of FOD on iron surface obeys Langmuir adsorption isotherm with chemisorption and physisorption mechanism.

The aim of this paper is to study the chemical composition of alkaloids present in Haloxylon scoparium Pomel extracts and to evaluate their antioxidant capacity. The alkaloids were isolated from two parts of Haloxylon scoparium plant by two extraction protocols. and The quantitative study made it possible to propose the best protocol for the extraction of the alkaloids. Moreover, GC-MS analysis of alkaloid extracts allowed us to determine their chemical composition. Haloxylon scoparium contains four types of alkaloids: tetraisoquinolines, phenylethylamines, tryptolines and tryptamines. The main compounds are the tetraisoquinolines type, the predominant product of which was N-methylsalsoline. These compounds present a great interest for the researchers due to their various pharmacological and biological activities. The antioxidant effect of the different plant extracts was studied by two methods: the ferric reducing antioxidant power (FRAP) and 1,1-diphenyl-2-picryl hydrazyl free radical (DPPH·) scavenging tests. The results show that extracts of root part are more active than those from aerial part; the acetone/water extract is the most powerful. The interesting results obtained in this study will be supplemented by other analyses and biological tests in order to better valorize this plant.

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The aim of this study is to evaluate the importance of toxicological analysis in acute intoxications by pesticides through the experience of the laboratory of the Poison Control and Pharmacovigilance Center of Morocco (CAPM). This is a retrospective study from January 2014 to September 2020, concerning suspected pesticides poisoning cases. The cholinesterase activity was measured in whole blood and the chromatographic analyzes (GC-MS and LC-MS-MS) were conducted in blood, urine and gastric lavage fluid. In this study, 398 tests were involved. The median age of the patients was 14 with an interquartile range of [4-26 years]. The sex ratio (F / M) was 1.5. The requests were from the region of Rabat-Salé-Kénitra in 82.8% of cases (north-western Morocco). The cholinesterase activity measurement was performed for 295 patients with low values in 3.7% of cases. The toxicological screening by GC-MS and LC-MS-MS detected the pesticide responsible of poisoning in 62 cases as insecticides in 38% of cases, redenticides (33% of cases) and herbicides (5% of cases). Toxicological analysis plays an essential role in the diagnosis and the management of acute pesticides poisoning. Interpretation of results is carried over by analyst with close cooperation with clinical toxicologist.

The objective of this work was to study the chemical composition and antioxidant activity of tannins extract of Aloe saponaria (TEAS). The Aloe saponaria (syn. Aloe maculata) is a succulent plant belonging to the Xanthorrhoeaceae family, this succulent plant native to South Africa was introduced in Morocco as an ornamental plant, rustic and easy to grow. In order to ensure this, morphological and histological study method of the species, phytochemical screening, characterization of TEAS by gas chromatography coupled to mass spectrometry (GC/MS), and the study of antioxidant activity by two methods (2,2-diphenyl-1-picrylhydrazyl (DPPH) and total antioxidant capacity (TAC) assays) were examined. The results of phytochemical screening indicated that the Aloe saponaria leaf was rich of alkaloids, tannins catechics, flavonoids, sterols, triterpenes, oses, holosides, mucilages and reducing sugars. In addition, the main constituents of TEAS identified by GC/MS analysis were Linolenic acid (32.22%), Palmitic acid (17.42%), and Phytol (11.30%). Regarding antioxidant activity, the TEAS showed a significant antioxidant effect.

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