Overseas research progress of new process for synthesis glycerol from formaldehyde is introduced. Close relationship of the technology yielding with formose technique is reviewed.
The endemic fluorosis is a kind of endemia widely distributed in Ningxia, and this is strongly related to the special natural geochemical environment of Ningxia.
The volcanogenic deposits hosted in differential yolcanic rock series and cogenetic deposits hosted in undifferential baste volcanic rock series have been divided and studied in this paper.
The biological stability(assessed by AOC), had close relation to tannin value, and was increasing with the tannin value, but it had no velation to the pore size distribution.
The paper analyzes the occurrence regularity of rock burst of about 263 times in Laohutai mine field by database, the osculating relations of rock burst and active faults were summarized.