Films of pure poly(vinyl alcohol) (PVA) and samples doped with di€erent concentrations of heptahydrated ferrous sulphate were prepared using a casting method. Mechanical and relaxation properties were measured before and after irradiation. The modulus of elasticity, yield strength, tensile strength ductility and relaxation time were produced from true stress±true strain and stress relaxation me...

Ferrous and ferric sulphates and (oxy)hydroxides can grow on pyrite surfaces and slow oxidation rates. However, in northern climates, repeated freeze/thaw cycles can cause cracks, channeling and exposure of new surfaces. In the present study, weathering in a repeated freeze/thaw experiment was compared to a regular humidity cell experiment. Introductory results (after 17 weeks) show very small ...

Polystyrene grafted with acrylonitrile using gamma-irradiation technique was successfully synthesized. This process was carried out at various gamma dose (0.2-1.5 Mrad). The new grafted polymer was characterized and its properties were investigated. The results indicate that best grafting percentage ratio could be revealed when the concentration of the catalyst Ferrous Ammonium Sulphate (FAS) i...

A prospective, randomized, parallel-group, multi-center study was conducted in the Department of Obstetrics and Gynecology at Menoufia University Hospital and central hospitals at Menoufia governorate, Egypt including 300 pregnant women in the second trimester diagnosed with iron deficiency anemia (IDA) who were divided into three groups, the first received lactoferrin capsules, the second rece...

Egg fortification with trace minerals is considered as a route towards the prevention of Micro Nutrient Malnutrition...

FROMAGEOT & DESNUELLE [1935] proposed a method of estimation of pyruvic acid based on the oxidation of x-ketonic acids by ceric sulphate. The value of the method is diminished by the fact that numerous substances commonly encountered in biological material, e.g. lactic and citric acids, also react with ceric sulphate. The interference by lactic acid is not serious so long as the amount of the l...