August 2017
Review on factors affecting the quality and antioxidant properties of tomatoes
Postharvest losses in tomatoes are not only quantitative but also qualitative losses which directly can have a negative impact on consumer’s preference, nutritional quality and income of producers. Therefore, it is important to identify factors that can affect the postharvest quality and antioxidant composition of tomatoes. Tomato quality is an outcome of several factors including cultivar selection, environmental...
August 2017
Quorum sensing signal production by sponge-associated bacteria isolated from the Red Sea, Egypt
Bacteria regulate their social activities and physiological processes through a quorum sensing (QS) mechanism. Many bacteria inhabit the mesohyl matrix of sponges. This symbiotic relationship is believed to contribute to the health and nutrition of sponges by production of protective antibiotics, the acquisition of limiting nutrients and nitrogen fixation. Marine isolates were analysed by bioassays using two different...
August 2017
Antibacterial activity of Aspergillus isolated from different Algerian ecosystems
Thirty two strains of Aspergillus genus were isolated from soil samples obtained from particular ecosystems: Laghouat endowed with a desert climate and Teleghma with a warm and temperate climate. Based on the morphological aspect, this collection was subdivided into ten phenotypic groups. This identification was confirmed by molecular analyzes using a molecular marker of the genu ribosomal 18s. This marker will allow us...
August 2017
Antibacterial and antioxidant activity of silver nanoparticles synthesized using aqueous extract of Moringa stenopetala leaves
Green synthesis of silver nanoparticles (AgNPs) is non-toxic and eco-friendly than commonly used physicochemical methods. The study focuses on synthesis, characterization, antibacterial and antioxidant activity of AgNPs synthesized using aqueous extract of Moringa stenopetala (M. stenopetala) leaves. Optimum heating time required for the preparation of aqueous extract of M. stenopetala leaves was 15 min. It was found...
August 2017
Outbreak investigation of Newcastle disease virus from vaccinated chickens in Eritrea
Newcastle disease (ND) is one of the most important infectious viral diseases of poultry in Eritrea. Diagnosis of ND virus infection in Eritrea has been mainly based on clinical examination and post mortem lesions. This study describes ND diagnosis using reverse transcription polymerase chain reaction PCR (RT-PCR), virus isolation and serological techniques (haemaglutination inhibition test) from two times vaccinated 40...
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