Sulphate compound

Sadler II, Smith DW, Shearman MS, Ragan Cl, Tailor VJ, Pollack SJ. Sulphated compounds attenuate beta-amyloid toxicity by inhibiting its association with cells. Neuroreport 1995 7 49-53. 

Schaumberg et al. [58] made a qualitative infrared spectroscopic study of water-soluble compounds extracted from sewage sludge/oil mixtures which were being incubated in the laboratory for 100 weeks at 25°C, and the results are presented. It was found that there was a pattern to the microbial decomposition of anaerobically-digested sewage sludge which involved the disappearance of carbohydrate, protein, sulphonate, and/or sulphate compounds, coupled with the appearance of carboxylates and nitrates. 

Sulphur dioxide dissolves in aqueous solutions of inorganic salts frequently more readily than in pure water. With most salts, excluding sulphates, compounds appear to be formed in solution of the general type MX. SO 2, where M and X stand for univalent metal and negative radical, respectively.2 The solubility curve of sulphur dioxide in sulphuric acid of concentration ranging from 55 to 98-5 per cent, is interesting. A minimum occurs at 85-8 per cent, acid, and from that point the curve inclines sharply upwards for both increase or decrease of sulphuric acid concentration.3... 

By heating the alkali vanadyl sulphates, compounds have been obtained which can be looked upon either as the dehydrated forms of members of this series, or as salts of the acid sulphate, HV(S04)2, mentioned above 5... 

Figure 8.17. Static S NMR spectra of representative sulphide and sulphate compounds. A. Cubic ZnS (upper) and hexagonal ZnS (lower) adapted from Bastow and Stuart (1988). B. CS2SO4, from Eckert and Yesinowski (1986) by permission of the American Chemical Society.

D. Other sulphated compounds (common or commercial names in brackets)... 

Table A-70 Equilibrium constants of reactions involving thorium sulphate compounds and complexes. The valnes are based on the Pitzer model and the values pre-...

As alternatives to aluminium, the salts of iron can make very effective coagulants. The most widely used is the trivalent ferric chloride (FeCl3). This is more effective than the equivalent hydrated sulphate compound Fe2(S04)3-(H20)g. 

Sulphate Compound, B.P.C. Tablets of Ferrous (.d) FeS04 Powder the tablets... 

Just as in the case of N, the source of the sulphur of higher plants is an oxidized form, namely sulphate. And just like nitrate, sulphate must first be reduced. Ultimately, sulphur is present in the doubly negative form as S. The first step in the assimilation of S is the fixation of sulphate. This is brought about by sulphate reacting with ATP to liberate pyrophosphate. An adenosine-phosphate-sulphate compound is formed and to the ribose of this compound another phosphate residue from another ATP molecule is attached. The product thus obtained is 3 -phosphoryl-5 -adenosine-phosphoryl-sulphate or simply active sulphate (Fig. 114). In this way sulphur is fixed and activated. It is this bound form of active sulphate which is subjected to reduction to the level of S. It is likely that 2 electron transitions are also implicated here. The mechanism is still unknown. 

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