background: the development of toxicity tests regarding toxic responses of different fish species could be more effectively used in predictive toxicology and risk assessment. in this study lethal concentrations (lc50-96 h) values of copper sulphate an important toxic industrial pollutant, on capoeta fusca were determined. behavioral changes at different concentrations of cuso4 were determined f...

Liesegang rings were first discovered more than 100 years ago by German chemists R. E. Liesegang and they attracted much attention since then. Liesegang rings are observed as spontaneous evolution of precipitate ring structure during diffusion of certain electrolyte into medium containing other electrolyte. One such example is diffusion of CuSO4 into gelatin containing K2CrO4 that is subject of...

Because of the limitations of standard culture techniques, the development of new recombinant protein expression systems with biotechnological potential is a key challenge. Ideally, such systems should be able to effectively and accurately synthesize a protein of interest with intrinsic metabolic capacity. Here, we describe such a system that was designed based on a plasmid vector containing pr...

Investigations were carried out on the feasibility of using an oral repletion technique in the rat to assess the bioavailability of copper in experimental sources providing no more than 250 micrograms Cu from any one source. Preliminary studies on the response in plasma Cu of partially Cu-depleted rats given repletion doses of 20-50 micrograms Cu as CuSO4/d on four consecutive days indicated th...

In this quantum chemical investigation, NH(3) physisorption onto a model of copper sulfate impregnated silica is compared with pure silica and copper sulfate adsorbents. The physisorption process is modeled as direct binding of the NH(3) molecule to the adsorption site of the dry adsorbents and as displacement of a H(2)O molecule by NH(3) in the hydrated complexes. The surface of silica is repr...