A Study of the Synthesis of Siloxyquinolines

Abstract

Sixteen new 8‐siloxyquinolines and 5‐chloro‐8‐siloxyquinolines were synthesized, Structures of all new compounds were determined by IR, NMR, MASS, and elemental analysis. The factors affecting the silylation reactions are disccussed. From the UV absorption pattern, it is shown that the (p→d)π interaction of the Si‐O bond does exist.

Microbial Dynamic Changes under Different Grazing Intensities in Growing Seasons of Desert Steppe

“…1 Dynamics of soil microorganism numbers in soil depth of 0 ~ 20cm under different grazing intensities Grazing influence on the soil microbial quantity. Soil microbial activity are influenced by soil conditions, pasture growth and grazing intensity and other effects [2], and sensitive to the change of soil environment.…”

“…Its life activities can improve the nutritional conditions for the plant, and can transform insoluble inorganic substances into solubility [1]. The number and distribution of soil microbial in the soil not only reflect the effect of grassland use on the microbial and soil, but also reflect the grassland health status [2,3,4]. Soil microbial plays an important and indispensable role in grassland ecosystems.…”