Antibacterial, antifungal and antioxidant activity of lavandula angustifolia of the middle atlas central (Morocco)

Le présent travail a été entrepris dans le but de valoriser les plantes aromatiques et médicinales de la région de Dayet Aoua (Moyen Atlas, Maroc), plus particulièrement de ces plantes. ajouté pour la pharmacopée marocaine en général; ce n'est autre que la lavande (Lavandula angustifolia).The chromatographic statistics with the Essential Components. Les monoterpénols sont représentés par une domination du linalol (33,74% à 38,74%), suivis des monoterpénols. Les tests microbiologiques des huiles essentielles de Lavandula angustifolia ont un pouvoir antibactérien important vis-à-vis des bactéries à Gram positif. Il est également important de noter que la lavande a un effet inhibiteur sur la croissance du mycélium contre A. alternata, B. cinerea et F. oxysporum; la souche de B. cinerea semble être la plus sensible à ce qu'il est comparé aux autres souches représentées par F. oxysporum et A. altern.Enfin, il convient également de noter que, selon les résultats obtenus, les huiles fixées de Lavandula présentent une activité anti-radicalaire par l'inhibition du DPPH, cette activité augmentant en fonction de la concentration.Compte tenu de toutes les données importantes qui démontrent les caractéristiques et l’importance de cette plante, confirmées et soutenues par cette étude, il semble nécessaire d’intervenir dans toutes les interventions et jaloux des fonctionnaires et des chercheurs ainsi que des citoyens afin de maintenir cette plante afin de préserver soutenir ce type de plantes d'une part et de, d'autre part, la conservation de la biodiversité au Maroc en général et dans cette région en particulier

Biotechnological recovery of industrial waste: Production of bioethanol from free yeast and immobilized from whey

The lactose in cheese whey is an interesting substrate for the production ofbulk commodities such as bio-ethanol, due to the large amounts of wheysurplus generated globally. In the present context of increasing demand forenergy and biofuel, the microbial synthesis of ethanol using industry wastematerials has gained recent importance. The present study deals with theethanol production from whey-a dairy waste by using potentialthermotolerant immobilized yeasts isolates in free and immobilized state.Two species of thermotolerant yeasts strains, Candida inconspicua,Candida xylopsoci and standard culture of K. marxianus were used forbioethanol production. Of the selected thermotolerant yeast species,Candida inconspicua W16 exhibited the maximum production of ethanol(3,9± 0.02 v/v) on immobilization as well as in free State (1.9 ± 0.08 % v/v)within 72 h using whey as a substrate. The experiment revealed that thethermotolerant yeast Candida inconspicua is efficient in bioethanolproduction from whey, when it is immobilized

Removal of textile dyes from water by the electro-Fenton process

International audienceAn environmentally friendly electrochemical treatment, electro-Fenton process, was applied to the depollution of a synthetic dismissal composed of three dyes, yellow drimaren, congo red and methylene blue, frequently used in textile and dyehouses. Here, we show that those dyes and their mixture are quickly degraded under current controlled electrolysis conditions, leading to an almost complete mineralization. The results show the efficiency of electro-Fenton process to quickly degrade aqueous effluents polluted by synthetic organic dyes

Valorization of the wast descended from the hydrodistillation of Rosmarinus officinalis

The production of essential oils from rosemary (Rosmarinus officinalis)result the formation of lignocellulosic waste, not easily biodegradable andinvolve environmental problems. In this work we developed process toproduce monomeric sugars with high added value from this waste, after thetreatment respectively with the vapour (10min, 205°C under 1 bar) and acidhydrolysis ( sulphuric acid 0.5%).The acid hydrolysis thereafter, improved by pretreatments (explosion bythe steam of water), permits to damage all polymers recalcitrant to theacidic hydrolysis

Field Study and Chemical Analysis of Plant Waste in the Fez-Meknes Region, Morocco

Throughout the entire world, the biomass plant remains an important source of renewable energy. However, in Morocco, the energy recovery of this biomass is little or badly exploited compared to other solar, hydraulic, and wind resources. The aim of this study is to know the extent to which Moroccan companies are involved in the valorization of green waste and to identify among the latter those that have great energy and industrial value. The field investigation was carried out with the use of a questionnaire to different sectors of activity. The chemical analyses of the waste samples were carried out by different methods: Van Soest to investigate the fiber content, dinitrosalicylic acid and phenol-sulfuric acid to determine sugars, while the Folin–Ciocalteu method was employed for the determination of phenolic compounds. These are the ASTM standard methods to determine elemental, proximate composition, and calorific value (CV). The results of this survey showed that solid vegetable waste is diverse and represents 68.4% of the total green waste, of which 98% is not treated. Moreover, the chemical analysis displayed that forestry waste (FW), extracted parts wastes (EPW), and unused parts wastes (UPW) of medicinal and aromatic plants have high contents of cellulose (respectively 34.75, 48.44, and 54.19%) and hemicelluloses (28.44, 27.19 and 28.50%) and containing low amounts of lignin and phenolic compounds compared to olive waste (OW), olive pomace (OP), and household waste (HW). Almost all biomass wastes, except HW, have a low moisture (<12%), ash content less than 5.1%, a significant percentage of C and H, and CV between 14.5 and 21.6 MJ/Kg. The PCA analysis showed a discrepancy in terms of components between the set formed by FW, UPW, and EPW with other solid waste. In conclusion, FW, UPW, and EPW, specially can be potentially energetic biomass and valorized together in the form of a mixture

Electro-oxidation of the dye azure B: kinetics, mechanism, and by-products

International audienc