The phytoflagellate Prymnesium parvum has been reported in Europe (Otterstroem et al., 1939, Liebert et al., 1920), where it occurs sporadically and causes mass mortality among fishes. In 1947 Prymnesium parvum first appeared in Israel fish ponds, rapidly spreading through regions where water was brackish. Since then it has caused extensive damage to the fish breeding industry and is now the mo...

The immune bodies of antipneumococcus serum are completely precipitated by 38 to 42 per cent. saturation with ammonium sulphate. They are incompletely precipitated by (a) ammonium sulphate in less than 38 per cent. saturation, (b) saturation with sodium chloride, (c) dilution and saturation with carbon dioxide, (d) removal of crystalloids by dialysis. The immune bodies of antipneumococcus serum...

An extracellular cold active lipase from Pseudomonas sp. VITCLP4 was concentrated by two methods, ammonium sulphate precipitation and ultrafiltration. Ammonium sulphate precipitation with 40% saturation was found to give good results with 125-fold partially purified lipase and yield of 63%. Further purification by DEAE-Sephadex ion exchange chromatography resulted in 4.6-fold purified enzyme wi...

The aim of the present study was to assess the effects of ammonium sulphate exposure on the antioxidant defence system and lipid peroxide concentration in the testes of wistar rats, as well as the examine possible protective role of zinc from the adverse effects of ammonia .The LD50 of Ammonium Sulphate and Zinc Chloride were determined, after toxicity testing evaluation. It is 91.5 mg/kg body ...

Effects of initial ammonium sulphate concentration on growth and glycerol production kinetics of two endogenic wine yeast strains, Saccharomyces cerevisiae Kalecik 1 and Narince 3, were investigated in a batch system. Maximum specific growth rates for Kalecik 1 and Narince 3 were obtained at initial concentrations of 1.0 g/L, and 0.8 g/L ammonium sulphate, respectively. Further, maximum specifi...

IN this paper, 'which is the concluding one of the series, we are concerned with the fractionation, by means of a neutral electrolyte and electrodialysis, of a few sera which have already been investigated in the ultracentrifuge [McFarlane, 1935, 1, 2, 3]. The particular objects in view have been (1) to investigate the composition of the globulin fractions obtained by a single precipitation wit...

A serious problem in cultivation of ornamental plants is a lack scientific and applied program in fertilization, so that the plant nutrition focused on growth medium. A randomized completely design with 8 different fertilization methods with the use of ammonium sulphate, potassium sulphate, di ammonium phosphate, ferrilene and kristalon was conducted in three replications in a greenhouse of Cha...

The technique of three-phase partitioning (TPP) was used to purify the green fluorescent protein (GFP) in a single step. TPP uses a combination of ammonium sulphate and tert-butanol to precipitate proteins from their crude extracts. In the first round of TPP with 20% ammonium sulphate saturation at the ratio of crude to tert-butanol 1:1 (v/v), most of the GFP remains in the lower aqueous phase....