Vitamin D2 in fat emulsion was extracted completely with tert-butylmethylether.

Ergosterol can be inverted into precursor of vitamin D2 under ultraviolet radiation, then it undergoes isom-erization to form vitamin D2 by thermal dehydrogenation.

OBJECTIVE: To establish a HPLC method for the simultaneously determination of Vitamin D2, Vitamin A and Vitamin E in Cernevit-12 for injection.

A method of transforming ergosterol into vitamin D 2 is introduced.

A new method for determining Vitamin D 2 in microdot capsule by RP-HPLC was proposed.

Objective: To prepare the inclusion compound of Vitamin D 2 and to study its stability and solubility.

Application to fault diagnosis of reciprocating compressor based on emprical mode decomposition and correlation dimension;

Application of correlation dimension and EMD-based AR model in the fault diagnosis;

Determination method and diagnosis application of non-scale range of correlation dimension;

Study of the Parameters Used in Calculating Correlative Dimension Based on G. P Algorithm;

Feature Extraction of Surface Electromyography by Introducing Correlative Dimension;

The nonlinear parameters (correlative dimensions, maximum Lyapunov exponents) of the HRV signals extracted from normal and arrhythmia ECG signals were calculated, and the results showed that the nonlinear parameters calculated from the HRV signals were helpful for analyzing human s hea.