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[Thin layer chromatography and extractive technology of Panax japonicum C.A. Mey. var. major (Burk.) C. Y. Wu et K. M. Feng growing in Qingba Mountain Area].
  • Q. Chi, J. Guo, Q. Dang
  • Chemistry, Medicine
  • Zhongguo Zhong yao za zhi = Zhongguo zhongyao…
  • 1 August 1992
Chemical components of the root, stem and leaves of Panax japonicum var. major were compared with those of Radix ginseng and Radix notoginseng by TLC. The results showed that the total saponin of theExpand
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Deuterium isotope effect on the intramolecular electron transfer in Pseudomonas aeruginosa azurin
Intramolecular electron transfer in azurin in water and deuterium oxide has been studied over a broad temperature range. The kinetic deuterium isotope effect, kH/kD, is smaller than unity (0.7 at 298Expand
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[Isolation and structure determination of a new saponin of Anemarrhena asphodeloides].
A new saponin, named smilageninoside, mp 265-7 degrees C, was isolated from rhizomes of Anemarrhena asphdeloides by conventional method. The structure of smilageninoside was identified on the basisExpand
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[Ultrafiltration properties in preparing injections of Chinese medicinal herbs using a J-48 ultrafilter].
  • Q. Chi, H. Nie, Q. Dang
  • Chemistry, Medicine
  • Zhongguo Zhong yao za zhi = Zhongguo zhongyao…
  • 1 October 1989
Four injections of single Chinese medicinal herbs and 3 medical solutions of pure substances showing impurities were prepared by J-48 ultrafilter. The retention rate of effective compounds and theExpand
Bifurcation Analysis Of An Epidemic Model With Delay As The Control Variable
A SIS epidemic model proposed by Cooke et al.[2] is investigated. Using time delay as the control parameter, we investigate the stability and Hopf bifurcation of the model by analyzing theExpand
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BANG-BANG CONTROL SYSTEM DESIGN FOR THE IR TRACKING SYSTEM
The operational performances of the bang-bang control system as a tracking system (especially as an IR homing system) are analysed on the basis of the general theory of the bang-bang controlExpand