synthesis and characterization of two functionalized gold nanoparticles by using of two poly functional amino acids (l-arginine and l-aspartic acid) are reported. the gold nanoparticles were reduced by sodium citrate and functionalized with l-arginine at the ph of 7 and 11 and l-aspartic acid at the ph of 7. transmission electron microscopy, uv-vis spectroscopy, dynamic light scattering, zeta p...

Coffee is the most appreciated beverage in worldwide; Brazil largest producer and exporter of this commodity. Organochlorine endosulfan was banned from country 2013 due to its teratogenic agent-related features. Since then, coffee plantations have experienced increased Hypothenemus hampei infestation rates. The aim current study assess variations rates Coffea arabica fruits brocaded by H. after...

gold preparations are one of the oldest disease modifying drugs in the treatment of rheumatoid arthritis. this are different reports about the effects and complications of these compoumis. these opposite reports may he due to the difference in genetic ami ethnic background of patients. this study was designed to evaluate our results in gold therapy ami compare them with those of western countri...

Several methods have been developed for gold exploration in the past, among which biological base method is known to be the most efficient with least expenses. This method can also be used for latent gold prospects exploration. In the present study, the possibility of applying Bacillus cereus frequency in soil as a biological marker was investigated for the exploration of latent gold prospectin...

Since 1945 there has been considerable regional variation in the problems facing the venereologist. Some figures from an inland industrial area may, therefore, be of general interest. In Birmingham there is a large immigrant population, mainly Carribean, but with a sprinkling of Indians and Pakistanis. The economic situation has been, on the whole, satisfactory, though some patients pay one vis...

This paper studies the influence of process parameters: temperature, the weight of the added precipitant agent, pH and reducing agent on the kinetics of the process of reduction and precipitation of gold of 98.44% purity obtained in the process of electrical and electronic waste recycling. The optimal conditions of reduction and precipitation of colloidal gold particles in the process of re...