doi:10.6088/ijaser.0020101016 Abstract: Many antioxidants have been investigated as hepato-protectors against ionizing radiation induced injury since they reduce the oxidative effect of the reactive oxygen species on normal cells. Spirulina is a potent scavenger of a variety of free radicals. The aim of this study was to investigate the radio-protective effect of Spirulina algae against oxidative stress and tissue injury caused by gamma radiation. Rats were irradiated at two doses of 2 and 4Gy from cesium-137 source. Ten days prior to irradiation, animals received Spirulina daily (300mg/kg body weight i.p.). In the irradiated animal group, the oxidative stress markers malondialdehyde (MDA) was significantly increased in the liver, while a marked decrease in hepatic contents of DNA, and glutathione (GSH).The level of cholesterol, triglyceride (TG), low density lipoprotein (LDL), as well as activitiy of aspartate aminotransferase (AST), alkaline phosphatase (ALP), and gamma-glutamyl transferase (GGT), were significantly increased in sera of the irradiated rats. This was coupled with a decreased serum level of high-density lipoprotein (HDL) and total serum protein by irradiation. The administration of Spirulina alone daily for 10 days caused a significant decrease in MDA and produced significant elevation of liver GSH. Moreover, a significant decrease occurred in cholesterol, and TG level with no change in serum LDL or HDL levels in serum. Treatment o

Thirteen exetic and advanced peanut breeding genotypes, and two check cultivar (Giza/6 and Ismailia 2) were evaluated for yield and yield component under eighteen divers environments condition i.e. three years (2017, 2018 and 2019), three locations (Ismailia, Shandawell and Toshka) Reasearch station and two sowing dates (1 st April and 1 st June). The components of G x E interaction, phenotypic and genotypic stability parameters were estimated according Eberhart andRussel (1966) and Tai method (1971). The obtained results revealed that Pooled analysis of variance indicated, highly significant differences among genotypes, years, locations and sowing dates as well as all interactions between them for all characters, providing evidence for the necessity of testing studied genotypes in multiple environments. Phenotypic stability parameters indicated that genotypes (4 and 6) were classified as highly adapted to favorable environments for pod yield ard/fed. and oil percentage as well as line (Ismailia/2) for pod yield ard/fed. The most desired and stable lines showed genotypes (2,5 and 10) for pod yield ard/fed. under wide range variable environmental conditions; genotypes (2and 5) for shelling percentage and pod yield ard/fed. as well as genotypes (5 and 8) for 100-seed weight and oil percentage. Genotypic stability estimates showed that, the most average stable genotypes were, genotypes (2 and 10) for pod yield ard/fed., genotype (7) for 100-seed weight, genotypes (11 and 13) for shelling percentage as well as genotypes (9 and 12) for oil percentage. It is worthy to mention that, the phenotypic and genotypic of stability are quite similar for describing stability in peanut genotypes (2 and 10) for pod yield ard/fed. and genotype (13) for shelling percentage. It is therefore suggested that these genotypes may be recommended to be included in any breeding program for improving peanut pod yield stability under different environments.

In this paper, the green synthesis of silver nanoparticles (AgNPs) using Psidium guajava leaf extract at room temperature. The prepared silver nanoparticles were characterized using UV-Vsible Spectroscopy, Transmission Electron Microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Thermal gravimetric analysis (TGA). The effects of extract concentration, extract pH and contact time on the size and shape of silver nanoparticles are studied. The data revealed that the rate of formation of nanosilver increased significantly in the basic medium and with increasing temperature. TEM studies showed that the particles to be of various shapes and sizes. X-ray diffraction (XRD) study confirmed crystalline nature of the synthesized nanoparticles. FTIR measurement showed that the silver nanoparticles having a coating of the extract compounds indicating a possible role of groups of phenolic compounds that act as a capping and stabilizing agents for the formed silver nanoparticles. Thermo gravimetric analysis (TGA) was carried out to determine the amount of capping phytochemicals on the silver nanoparticles. Supposed mechanism for the formation of silver nanoparticles is discussed.