Search

In the context of the search for alternatives to synthetic fungicides to limit their environmental impact, this study explores the potential of the essential oil of Juniperus communis L. The objective is to characterize this essential oil and to study its antioxidant activity. And antifungal. The essential oil was extracted from the aerial part of the plant by hydrodistillation, providing a yield of 0.41 ± 0.04%. Analysis of the chemical composition by gas chromatography-mass spectrometry showed the predominance of Sabinene (33.55%), Limonene (20.67%), α-Pinene (15.21%) and Terpinen-4 -ol (10.93%). The predominant compounds represent 80.36% of the total composition. The essential oil also showed strong antioxidant activity, largely due to the presence of Terpinen-4-ol. Finally, the antifungal activity of the essential oil was tested in vitro against Ascochyta rabiei, the causative agent of seed-borne chickpea ascochyta blight. The results showed complete inhibition of the radial growth of the pathogen at low minimum inhibitory concentrations (0.25 µL mL-1). However, the essential oil did not show phytotoxic effects at minimum inhibitory concentrations, although it may reduce the percentage of chickpea seed germination at concentrations above the MIC. These results encourage further research on the use of this essential oil and its major compounds in the formulation of natural phytosanitary products to replace synthetic fungicides., Journal of Analytical Sciences and Applied Biotechnology, Vol 4, No 2 (2022): July - December (In progress)

Traditional beers are often assumed to be safe. This study investigated the conservation and quality of this beer using essential oils extracted from four plants. Twenty five samples of local beers were collected from traditional producers. The chemical composition of the essential oils from the barks of Boswellia sacra, the flowers of Jasminum sambac, leaves of Pandanus odoratissimus and Matricaria chamomilla obtained by hydrodistillation were analyzed using gas chromatography. The chemical composition of the essential oil obtained from Boswellia sacra was composed of sesquiterpene hydrocarbons (57.60 %) and oxygenated sesquiterpenes (20.02 %). The essential oil obtained from Matricaria chamomilla contained 95.21 % of oxygenated monoterpenes and 89.98 % of piperitone. Ten components, representing 94.93 % of the total essential oil from the leaves of Pandanus odoratissimus, were found. The ability of the essential oils to preserve and stabilize beer samples was revealed by µmax of bacteria strains tested. Among the plants tested B. sacra presented the more capacity of inhibition on the strains with µmax value as 0.00410 ± 0.00038, 0.00610 ± 0.00011, 0.00990 ± 0.00073, 0.0176 ± 0.0011, 0.0160 ± 0.0010 respectively on E. coli, S. typhi, S. Nigeria, Y. enterocolitica, L. monocytogenes. The low values of µmax showed the potential of essential oils to inhibit the microorganisms found in the local beer and to preserve drink, keeping it safe., Journal of Analytical Sciences and Applied Biotechnology, Vol 4, No 1 (2022): January - June (In progress)

In agriculture, the use of organic amendments allows a better sustainability and productivity of the crop by improving the quality and structure of the soil, due to their richness in organic matter and nutrients such as phosphorus, nitrogen, potassium, etc. This study aims to evaluate the effect of two composts of different compositions on the growth and yield of three types of trees: peach, pear and orange. The experimental design used is a randomized block with three replications. The treatment of trees was carried out by four types of amendments which were composts with olive waste (OW), olive mill wastewater (OMW), manure (M) and NPK fertilizer (F) of type 10-15-12. Their fertilizing power was evaluated by monitoring the morphological parameters of plant growth: height, trunk diameter, number of branches, and those of production including size, weight of fruit and yield. The obtained outcomes reveal that the two composts have a very highly significant effect on the investigated parameters. The production was recorded only in peach trees with a total yield of 31.5 t/ha; 25.5 t/ha; 22.5 t/ha; 18.5 t/ha, respectively for OW, OMW, F and M., Moroccan Journal of Chemistry, مجلد 10, عدد 2 (2022): in progress

This study presents a new diet proposal for type 2 diabetics based on vegetables and fruits of the Cucurbitaceae family such as: cucumber, pickle, zucchini, squash, squash, watermelon and melon. The composition of these foods has a low carbohydrate content, this value which is considered acceptable for type 2 diabetics, also the foods used have very low lipid and protein values which characterizes the disadvantage of this diet, even if they contain acceptable levels of trace elements and vitamins. Sampling according to several criteria was carried out in order to obtain 7 patients out of 33 who participated in the proposal, and among them 3 participants who resisted following the diet for two months, after the 4 patients quit the diet following personal impediments. From a 9-week follow-up of the health status of the participants, the results show the effectiveness of the proposed diet based on the monitoring of fasting blood sugar and the percentages of glycated hemoglobin that decreased during the period of application of the model., Journal of Analytical Sciences and Applied Biotechnology, Vol 3, No 2 (2021): July - December (In progress)

The natural cosmetics industry sector is a booming market globally. Recently, interest in the potential of microalgae in cosmetics stems from the fact that they present an emerging source of active ingredients. The work presented in this thesis is part of the promotion of Moroccan microalgae for cosmetic application, the objective of which is the development of new formulations based on the microalga Isochrysis galbana for the care and treatment of hair. After culturing the algal biomass in the laboratory, a series of biological activities were performed, hence the in vitro antibacterial activity against Cutibacterium acnes (ATCC 6919) and Staphylococcus epidermidis (ATCC14990) and another in vivo biological activity which is to control the growth of rabbit hair. All the experiments show results motivated to develop and formulate new cosmetic products based on microalgae extract for hair care., Journal of Analytical Sciences and Applied Biotechnology, Vol. 3, No 1 (2021): January - June (Call for papers)

This work proposes the studying of characterization analysis of two natural Moroccan clays (RC and GC) in the same location from Bejaad (Province of Khouribga, Morocco) and to know the relationship dependence between them. The values obtained during the determination of a few parameters (density, pH, conductivity, dry matter - moisture content, organic matter-mineral matter) show that the two materials RC and GC studied have the same physical-chemical properties. The all characterization of the two clays was carried out by XRD, XRF, FTIR, SEM/EDX and TGA. The results obtained show that the two materials have very irregular and microporous structures, a heterogeneity of the pore forms and they are contain a mixture of Kaolinite, Illite, Quartz, Calcite, and Dolomite, with the presence of Hematite only in clay RC. On the other hand, The statistical approach applied to determine the dependence relationship between the two clays was based on two tests: Student's t-test (Comparison of two means for physical-chemical parameters) and Pearson's test (contingency table for XRF analysis) in order to prove that the two materials studied are the same chemical and physical-chemical characteristics., Moroccan Journal of Chemistry, Vol 9, No 2 (2021): In Progress

EnvironmentAsia, 14, 1, 33-40

Globally, SARS-Cov-2 continues to spread, causing widespread panic. Finding a cure to stop its spread has become a top priority. The use of chloroquine has been the subject of much debate in the scientific community around the world. The Scientific Committee of Morocco decided to use it to treat cases infected with covide 19. However, treatment depends on the health of each patient’s immune system. It is necessary to strengthen the immune system to protect itself or prevent possible infections, such as colds, fever, pain, shortness of breath and sore throat, symptoms similar to those of SARS-Cov-2 virus. An infusion, prepared in a traditional way from certain plants such as thyme, lemon, ginger, with a supplement of honey, is used by the Moroccan population to strengthen the immune system during the winter period to fight against colds, fever, pain, shortness of breath and sore throat symptoms similar to those of SARS-Cov-2. Thus, this infusion can be used to naturally strengthen the body’s immunity because it contains a significant amount of vitamin C, zinc, quercetin, bioactive substances called essential for the proper functioning of cellular metabolism against pathogens and possibly the famous SARS-Cov-2., Journal of Analytical Sciences and Applied Biotechnology, Vol 2, No 2 (2020): July - December (CALL FOR PAPERS)

This short communication studies the physicochemical properties of an abundant natural rock from the Sidi Lamine region of Central Morocco, used as a basic product in several building materials. Using X-ray diffraction (XRD) and scanning electron microscopy coupled with Energy–dispersive X–ray analysis (SEM/EDX), we show that the rock is composed mainly of calcite (CaCO3) and and a small amount of quartz (SiO2). From the spectroscopic data, we can ease the work later on this rock for the development of new building products., Journal of Analytical Sciences and Applied Biotechnology, Vol 2, No 1 (2020): January - June

a, Journal of Analytical Sciences and Applied Biotechnology, Vol 2, No 1 (2020): January - June

The accumulation of heavy metals (Cd, Pb, Cr, Li...) in soils, especially agricultural soils, can cause serious problems for the environment and organisms. The accumulation of these Heavy Metals is mainly due to intense human and industrial activities. These soil contamination problems can be partially solved by the application of phytoremediation technologies or phycoremediation using algae to complex and remove pollutants from the environment. In this study we evaluated the role of a macroalgae Corallina officinalis on the mitigation of chromium toxicity in the bean crop (Vicia faba L.). Our results showed that the addition 5% of Corallina officinalis improved growth parameters and chlorophyll content in bean leaves, and that in the presence of chromium, and reduced chromium toxicity on faba bean crop., Journal of Analytical Sciences and Applied Biotechnology, Vol 1, No 2 (2019): July - December

Essential oils are secondary metabolites produced by plants as a defense against phytophagous pests. These extracts contain complex compounds. The essential oils present many previous works, especially in Morocco. The present work is a continuation of chemical study of the essential oils of some mints grown in the Settat Morocco region: Mentha piperita, Mentha pulegium and Mentha spicata, against insects of cereals: Sitophilus Granarius, Sitophilus Oryzae and Sitophilus Zeamais. Experiments were conducted in the laboratory using different doses of these oils to evaluate the mortality they cause on the adults of the insects tested. The results of the sensitivity showed that the three essential oils of mint had important insecticidal properties against the pests studied. And as a result, they were able to destroy all the insects at a concentration of 2 μl/cm3 for a duration of 24 hours of treatment., Journal of Analytical Sciences and Applied Biotechnology, Vol 1, No 1 (2019): January - June

Two analytical methods were used to measure the formaldehyde content (perforator extraction method and gas analysis method) on a particle board sample made from urea formaldehyde resin. The perforator extraction method has a higher formaldehyde content compared to the gas analysis method., Journal of Analytical Sciences and Applied Biotechnology, Vol 1, No 1 (2019): January - June

Extracts of essential oils have various properties in different applications This work focuses on the chemical characterization of the aromatic compositions of two citrus species Citrus Aurantium CA and Citrus Reticulata CR which belongs to the Rutaceae family The essential oils were extracted by hydro distillation of the aerial parts stems leaves and flowers of citrus and analyzed by gas chromatography mass spectrometry GC MS Linalool alpha terpineol gamma Terpinene cis Linalool oxide Nerol Caryophyllene oxide Carvacrol beta Citronellol Spathulenol beta pinene and beta Oplopenone were obtained as majority compounds with a percentage of In essential oil of Citrus Aurantium CA Limonene gamma Terpinene Nerol and alpha pinene were obtained as major compounds with a percentage of The highest yields were recorded with Citrus Aurantium CA and Citrus Reticulata CR