启发 发表于 2025-3-23 09:42:13
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Chelating reagents for flotation of sulphide mineralsChelating reagents, because of their metal specificity, can function as effective mineral processing reagents.止痛药 发表于 2025-3-24 04:20:16
Professionals and housing,A number of professional groups are directly or indirectly employed in the provision of housing. In this chapter we discuss architecture, town planning, housing management, housing research and the legal profession. We also take a critical look at the housing pressure group Shelter.formula 发表于 2025-3-24 07:39:55
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The minority tenures,The largest minority tenure, and the only one widely recognised in the government’s statistics, is the privately rented sector. This is a shrinking sector, from around 90 per cent in the early years of this century, to 61 per cent in 1947 and 15 per cent in 1976.考古学 发表于 2025-3-24 14:56:08
Sulfenylium Cation Carriers in Chemistry and Biochemistry,Sulfenylium cations . have often been invoked as intermediates in reactions of sulfenyl derivatives.. Formally they are related to sulfenic acids ., as acylium ions or carbonium ions are related to carboxylic acids or alcohols, respectively.拖网 发表于 2025-3-24 22:26:55
Thermochemistry of Sulfur-Centered Intermediates,Sulfur-centered intermediates play important roles in the chemistry of coal, oil, atmospheric pollution and biological systems. If we are to fully understand this chemistry and to arm ourselves with some predictive power about the behavior of transient sulfur-centered species, we need to have reliable thermochemical data to guide us.epicardium 发表于 2025-3-25 00:58:50
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