نتایج جستجو برای: alkali metal
تعداد نتایج: 210259 فیلتر نتایج به سال:
It was established that at 298 K the molar heat capacity of alkali metal silicates 2 O· nSiO , Rb and Cs changes linearly when changing n from 1 to 4. Based on dependencies C o p,298 =f(n), values capacities O, O have been specified. Keywords: capacity, oxides metals.
Derived from the cyclic secondary amine 2,2,6,6-tetramethylpiperidine [TMP(H)] by removal of its nitrogen-attached hydrogen atom, the TMP anion 1 has had a 40 year career in the business of selective proton abstraction. Possessing attributes of high steric bulk and low nucleophilicity, without any b-hydrogen atoms (the presence of which often disadvantages its diisopropylamido analogue through ...
Nowadays, acid mine drainage (AMD) is one of the most important problems in coal mine contamination. The Karmozd coal mines in Mazandaran Province are one of the largest and oldest coal extractions in Central Alborze Coal Basin. The samples of coals, host rocks, mine drainages and secondary surface minerals have been collected in summer season of 2005. On the basis of hydrogeochemistry studies ...
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