Mycotoxigenic Fungi in Cereals grains and coffee from the North of Morocco

This contribution gives an overview of the contamination by fungal mycoflora of cereals and coffee consumed in the North of Morocco .Some species belonging to the genus Aspergillus that are known to be a potential producers of ochratoxin A(OTA), this mycotoxin has been shown to be a nephrotoxic, hepatotoxic, teratogenic and possibly carcinogenic for humans. The aim of the present work was to know the fungal distribution in some crops collected in northern Morocco, Tangier city. The species of saprophytic fungal were identified including Aspergillus and Penicillium that contaminate wheat, rice and coffee beans. Studies on fungal DNA detection in 88 fungal samples have been performed. They were identified at the species level, by sequencing the internal transcribed spacer (ITS4, ITS5) of ribosomal DNA (rDNA). This is the first report on the contamination by mycotoxigenic fungi in coffee from Morocco, and also there is no previous work exists on contamination by these fungi in cereals samples from North of Morocco

Optimization and characterization of gelatin and chitosan extracted from fish and shrimp waste

Fish and seafood processing industries generate large quantities of waste which are at the origin of several environmental, economic and social problems. However fish waste could contain high value-added substances such as biopolymers. This work focuses on optimizing the gelatin and chitosan extraction from tilapia fish skins and shrimp shells respectively. The gelatin extraction process was optimized using alkali acid treatment prior to thermal hydrolysis. Three different acids were tested at different concentrations. Chitosan was obtained after acid demineralization followed by simultaneous hydrothermal deproteinization and deacetylation by an alkali treatment with different concentrations of HCl and NaOH. The extracted gelatin and chitosan with the highest yield were characterized by determining their main physicochemical properties (Degree of deacetylation, viscosity, pH, moisture and ash content). Results show a significant influence of the acid type and concentration on the extraction yield of gelatin and chitosan, with an average yield of 12.24% and 3.85% respectively. Furthermore, the obtained physicochemical properties of both extracted gelatin and chitosan were within the recommended standard values of the commercial ones used in the industry

Optimization and characterization of gelatin and chitosan extracted from fish and shrimp waste

Fish and seafood processing industries generate large quantities of waste which are at the origin of several environmental, economic and social problems. However fish waste could contain high value-added substances such as biopolymers. This work focuses on optimizing the gelatin and chitosan extraction from tilapia fish skins and shrimp shells respectively. The gelatin extraction process was optimized using alkali acid treatment prior to thermal hydrolysis. Three different acids were tested at different concentrations. Chitosan was obtained after acid demineralization followed by simultaneous hydrothermal deproteinization and deacetylation by an alkali treatment with different concentrations of HCl and NaOH. The extracted gelatin and chitosan with the highest yield were characterized by determining their main physicochemical properties (Degree of deacetylation, viscosity, pH, moisture and ash content). Results show a significant influence of the acid type and concentration on the extraction yield of gelatin and chitosan, with an average yield of 12.24% and 3.85% respectively. Furthermore, the obtained physicochemical properties of both extracted gelatin and chitosan were within the recommended standard values of the commercial ones used in the industry

Characterization of Bradyrhizobia isolated from root nodules of Cytisus Triflorus in the rif occidental of Morocco

2 pages.Over the last 3 decades, soil in the North of Morocco has been heavily degraded as a result of human activities, In the north of Morocco, particularly the Riff occidental, there is a strong anthropozoogenic pressure, through the practice of clearing the land to profit from the extension of Cannabis culture and an increase in the frequency of forest fires. These factors threaten the survival of the shrubby legume in its ecological niche.Peer reviewe

Draft genome sequence of Pseudomonas fluorescens strain ET76, isolated from rice Rhizosphere in Northwestern Morocco.

Pseudomonas fluorescens ET76 was isolated from rice rhizosphere in northwestern Morocco. Its draft genome was estimated to be 6,681,652 bp with 5,789 coding sequences (CDSs). Genes encoding for type I to VI secretion systems, PvdQ, proteases, siderophores, hydrogen cyanide synthase, ACC-deaminase, among others, highlight its potential use in biological control of plant pathogens.201