Geochemical characteristics and growth suitability assessment of Georgi in the Earth's critical zone of North China.

Geochemical differentiation of soils has a series of consequences on plant and places pressure on the ecological environment. The quantitative evaluation of element migration in the Earth's critical zone is a challenging task. In this study, two demonstration study areas of Georgi were selected, and multiple chemical weathering indexes, chemical loss fraction, mass migration coefficients and biological enrichment coefficient method were used to assess the ecological and geochemical suitability.

[Synthesis and identification of artificial complete antigen 25-hydroxyvitamin D(3);].

Aim: To synthesize the 25-hydroxyvitamin D(3); artificial complete antigen and to prepare the specific antibody against 25-hydroxyvitamin D(3);.

Methods: The active group carboxyl was introduced into 25-hydroxyvitamin D(3); and formed 25-hydroxyvitamin D(3);-hemisuccinate which possessed the structure of the hapten by chemical modification. The EDC method was applied to conjugate 25-hydroxyvitamin D(3);-hemisuccinate to bovine serum albumin as an artificial immunogen.