Evaluation of the antibacterial activity of oily extracts of the grains of two varieties of red onion from Morocco

The aim of the present work is to evaluate the antibacterial activity of the oils extracted from the seeds of two varieties of red onion Doukkala and Amposta using hexane and ethanol. The ethanol extracts are more active than hexane extracts vis-a-vis bacteria gram+ tested (Staphylococcus aureus CIP 53154, Enterococcus faecalis CIP 103214, Bacillus cereus and Streptococcus A IPL141 IPT 5-84) and gram- (Escherichia coli CIP 54127, Entérobactersp, Pseudomonas aeruginosa CIP A 22 and Salmonella typhi CIP 5535). The MICs determined by the well-diffusion method for each extract show that the ethanolic oil extracts are bactericidal towards Staphylococcus aureus (SASM) and Staphylococcus aureus (SARM) strains. This could be explained by the fact that the ethanolic extracts are richer in polyphenols (98.7 ± 0.2 mg EGA / g extract) for Doukkala ethanol extract (EED) and (85.7 ± 0.2 in mg of EGA / g of extract) for the ethanolic extract of Tetouan (EET) (Amposta) which is also bactericidal with respect to the Bacillus cereus strain and this for a MIC of 0.125 mg / mL. The strain Enterobacter is sensitive in all the extracts while the 6-aminopenicillanic acid antibiotic 6-APA is not sensitive.

Composition chimique de l’huile essentielle de Satureja calamintha (L.) Scheele du Maroc

Ce travail vise l’étude de la composition chimique de l’huile essentielle de Satureja calamintha (L.) Scheele du Maroc. Les constituants chimiques principaux de cette huile essentielle sont borneol (34.52%), αcampholenic aldehyde (14.26%), cedren-13-ol (6.45%), et manoyloxide (3.78%).Mots-clés : huile essentielle, Satureja calamintha, composition chimique.Chemical composition of essential oil of Satureja Calamintha (L.) Scheele of MoroccoThis work aims to study the chemical composition of essential oil of Satureja Calamintha (L.) Scheele of Morocco. The main chemical constituents of the essential oil are Borneol (34.52%), α-campholenic aldehyde (14.26%), cedrene-13-ol, 8 - (6.45%), and manoyloxide (3.78%).Keywords : essential oil, Satureja Calamintha, chemical composition

A Convenient Synthesis of 5′-Iodoresiniferatoxin (I-RTX)

Starting from resiniferonol orthophenylacetate (ROPA, 2) and commercial 5-iodovanillin (5a), a convenient synthesis of the ultrapotent vanilloid antagonist 5′-iodoresiniferatoxin (1a) was achieved, overcoming the problems involved in the direct iodination of either resiniferatoxin (1b) or homovanillic acid (3a)

Acorn Oil: Chemistry and Functionality

Acorn oil has been receiving increasing attention due to its nutritional potentials. However, its application as a novel food ingredient has not yet been fully explored. This paper summarizes chemical composition, extraction methods, potential health benefits, and current applications of acorn oil, with the aim of providing suggestions for its exploitation. Acorn oil is an excellent source of essential fatty acids (oleic, linoleic, α-linolenic, and palmitic acids). Acorns are a rich source of tocopherols, with γ-tocopherol being the most abundant. It also contains various bioactive compounds such as polyphenols and sterols (mainly β-sitosterol). Diets enriched with acorn oil can be beneficial in preventing cardiovascular disease (CVD), cancer, and type 2 diabetes as well as offer antioxidant activity. Further studies should focus on producing better quality acorn oil such as the application of more innovative and optimized techniques that can increase its health benefits and hence utilization

Medicinal Uses, Phytochemistry, and Pharmacological Activities of Quercus Species

Quercus species, also known as oak, represent an important genus of the Fagaceae family. It is widely distributed in temperate forests of the northern hemisphere and tropical climatic areas. Many of its members have been used in traditional medicine to treat and prevent various human disorders such as asthma, hemorrhoid, diarrhea, gastric ulcers, and wound healing. The multiple biological activities including anti-inflammatory, antibacterial, hepatoprotective, antidiabetic, anticancer, gastroprotective, antioxidant, and cytotoxic activities have been ascribed to the presence of bioactive compounds such as triterpenoids, phenolic acids, and flavonoids. This paper aimed to provide available information on the medicinal uses, phytochemicals, and pharmacology of species from Quercus. However, further investigation is needed to fully clarify the mode of action of its bioactive compounds and to evaluate in vivo chronic toxicity, before exploring their potential use as a supplement in functional foods and natural pharmaceutics

Synthesis and Investigation of Solar-Cell Photosensitizers Having a Fluorazone Backbone

A synthetic sequence for the preparation of fully conjugated 2,7-disubstituted fluorazone (9H-pyrrolo[1,2--a]indol-9-one) derivatives has been developed comprising an Elming–Clauson–Kaas-type pyrrole formation, POCl3-mediated ring closure, selective halogenation and elongation of the conjugated backbone through cross-coupling reactions. As a proof of principle, this methodology was used to prepare for the first time two organic D–π–A dyes containing the fluorazone moiety. The new compounds display broad absorption bands in the visible-light region when adsorbed on nanocrystalline TiO2 and electrochemical properties compatible with their employment as photosensitizers in dye-sensitized solar cells. Small-scale photovoltaic devices fabricated with the fluorazone dyes yielded power conversion efficiencies in the range of 2.1–2.4 %, which correspond to approximately 70 % of the efficiency obtained with the reference organic dye DF15 under the same conditions