The accumulation of rare-earth and heavy metal ions from wastewater is important for industrial technology. However, practical accumulators are expensive with respect procurement raw materials, synthesis, preparation. Therefore, it preferable to accumulate using sustainable resources, such as natural polymers. Fucoidan, a water-soluble polymer, sulfated polysaccharide the cell-wall brown algae....

Dithiocarbamate chitosan, an insoluble derivative obtained from carbon disulfide, and N-(o—carboxybenzyl) chitosan and N—car— boxymethyl chitosan, two water—soluble olyamoholytes obtained from phthalaldehydic acid and glyoxylic acid, can be used for removal of metal ions from dilute solutions. Their characteristic properties are described in terms of infrared, ultraviolet and circular dichroism...

Syntheses of neutral 'buS2'-, 'S /and 'buS4'and of anionic buS: -complexes with various main group and transition metals are described. The complexes were prepared by reacting the neutral sulfur ligands or their alkali salts with the metal halide or alkoxide. The ligands coordinate to metal ions in normal as well as high oxidation states. No redox reactions occur in the latter case. The complex...

It is well-known that some metals/alloys are sensitizing on skin contact, but it is not so well appreciated that sensitization is dependent on the reaction of the metal/alloy with sweat. The first step in skin sensitization by metals/alloys is a corrosion process and the formation of soluble metal ions. The nature of this process has implications with respect to occurrence of metal contact derm...

The oxygen, uptake of lightly heparinized human blood was found to increase markedly upon the addition of bacterial endotoxins, soluble antigen-antibody complexes, or polystyrene latex particles. The effect apparently reflects a transitory stimulation of respiratory activity of the blood leucocytes. The effect did not occur in the presence of anticoagulant amounts of citrate or ethylenediaminet...

The coal mining residues from past activities in the Douro Coalfield are emplaced many dumps near areas, causing substantial environmental impacts. This study aims to contribute investigation of impacts caused by disposal residue through determination geochemical composition waste materials collected at 3 – 15 m depth, and water-leachable fraction produced percolation these inside dump. element...

Recently there have been a number of reports suggesting the possible importance of metals in ribonucleic acid. Wacker and Vallee (1) have reported the presence of chromium, iron, manganese, nickel, zinc, and other metals in various ribonucleic acid preparations, and have suggested that “metals may bear a functional relationship to protein synthesis and the transmission of genetic information.” ...