PubMed Health⌕ Search

Biomedical subjects

Chun-shan Zhou

Publications and source records attributed to Chun-shan Zhou.

5 recordsLinked to original sources
PubMed2004

[Pharmacognostic identification of Cryptolepis buchanaii].

OBJECTIVE: To supply basis for the establishment of quality standard of Cryptolepis buchanaii. METHOD: Characters of crude drugs, microscopic characteristic as well as UV spectrum of the herb were studied. RESULT: Laticifers were found in the cortex and pith of the stem; much papillary non-glandular hair was found covering the stomata in the sub-cuticle of the leaf. CONCLUSION: The results can be employed as the basis for identifying the herb.

Cryptolepis↗
PubMed2004

[Study on technology of extracting geniposidic acid from Eucommia ulmiodes and its application].

OBJECTIVE: To study the optimum technology of extracting bioactive component named geniposidic acid in Eucommia Ulmiodes by orthogonal test. METHOD: An orthogonal test table L16(4(5)) was used with the factors of extracting time, temperature, times, ethanol consistency and the ratio of solid to liquid. The content of geniposideic acid was determined by RP-HPLC. RESULT: The optimum technology was: temperature 50 degrees C, time 1 h, once, consistency 80%, and the ratio of solid and liquid 1:12. Under the condition, the best material of Eucommia Ulmiodes for extracting geniposidic acid was chosen. CONCLUSION: The technology can provide some theoretic advice for industry.

Chromatography, High Pressure Liquid↗
PubMed2004

[Study on optimizing the analysis condition for active compound in Eucommia olive].

The absorption spectroscopic determination of aucubin by condensation with p-dimethylaminobenzaldehyde was optimized in this paper. A high sensitive method was established and the linearity range of the method was from 4.5 to 45 microg x mL(-1). The influences of the factors, such as the dosage of coloring agent, reaction time, heating temperature and the dose of acid etc., on the system were studied. And the result indicated that all of the factors had obvious effects on the system. The method has been applied to determining the content of aucubin in the extract of Eucommia olive with satisfactory results.

Catalysis↗
PubMed2003

[Study on adsorption of tea polyphenol and caffine with polyamide resin].

The performance of adsorption of tea polyphenol and caffine with polyamide resin was investigated. The results obtained by spectrophotometry and HPLC show that the ability of adsorption of tea polyphenol with polyamide is stronger than that of caffine, in which hydrogen bond plays a very important role. The adsorption amount of caffine is 2.65 mg.g-1 with 7.5% adsorption ratio when 100 mL of 0.71 g.L-1 caffine is adsorbed on polyamide resine, but the adsorption amount of tea polyphenol is up to 148.13 mg.g-1 with 85% adsorption ratio when 700 mL of 1.98 g.L-1 tea polyphenol is adsorbed on polyamide resine. The dilution ratios of caffine and tea polyphenol are 74% and 90%, respectively, when they are diluted by 85% alcohol. The static adsorptions of caffine and tea polyphenol on polyamide resine reach equilibrium quickly in 80 min, and the plots of adsorption kinetics are nearly linear. Tea polyphenol and caffine are successfully separated on polyamide resine, and the obtained product contains more than 96% of tea polyphenol and 80% of EGCC with caffine less than 2.8%.

Adsorption↗