1.Comparison between overthick and overthin X ray film
Liu-Zhen BIAN ; Ting-Guo WEN ;
Chinese Medical Equipment Journal 1993;0(05):-
Many factors can result in X ray film overthick and overthin in medical X-ray radiation.In order to ensure the correctness of diagnosis and the focus can be presented at the proper time,it is very im- portant for the overthick and overthin film to be processed and corrected.It has been proved through the test that the satisfied result can be reached through the proper regulating measure such as making a copy of a film.
7.Urotensin Ⅱ levels of the plasma in obstructive sleep apnea syndrome patients and the pathological significance.
Yong LI ; Wen XU ; Lufei BIAN
Chinese Journal of Practical Internal Medicine 2001;0(05):-
Objective To study the levels of Urotensin Ⅱ(UⅡ)in the different grades of obstructive sleep apnea syndrome(OSAHS)patients and the correlation of UⅡ to OSAHS.Methods Seventy-five OSAHS patients were divided into five groups according to light,medium,serious AHI,simple snorers and normal part;UⅡ levels of the plasma were measured and correlation analysed.Results UⅡ levels:light group(10.44?4.12)ng/L、medium group(38.55?15.8)ng/L、serious group(94.78?19.63)ng/L、simple snorers group(1.37?0.42)ng/L、normal group(1.14?0.65)ng/L.Statistic difference existed among these groups(P
8.Study on Loganin and Morronside Concentrations in Rat Serum Containing Liuwei Dihuang Formula by SPE-HPLC and the Variety of Different Combinations
Lingling JU ; Hongmei WEN ; Xin MA ; Huimin BIAN ;
Traditional Chinese Drug Research & Clinical Pharmacology 1993;0(03):-
Objective To establish a sensitive and specific liquid chromatography method for the determination of loganin and morroniside in rat serum containing Liuwei Dihuang Formula(LDF).Methods Loganin and morroniside were extracted from the rat serum using SPE column,then separated on a C_(18)column.A HPLC method for determining serum concentration of mor- roniside and loganin in rats before and after administration LDF was established.Results A good linear calibration curve of lo- ganin and morroniside was obtained.The recovery of the method was in the range of 95 %~105 %.The extracted recovery was more than 75 % ,and within-day and intra-day precisions were less than 12 %.Conclusion This method is sensitive, simple and rapid for monitoring of drug level in the study on pharmacokinetics and different combination of LDF.
9.Recent Progress in Research on Small Molecule Agonist of Neurotrophic Factor Receptor Trk
Lei-Si BIAN ; Zhen-Guo LIU ; Wen-An WANG ;
International Journal of Cerebrovascular Diseases 2006;0(11):-
Neurotrophic factor activates signal pathways of intracellular phosphoinositide 3-kinase and extracellular signal-regulated kinase after acting on Trk receptor tyrosine kinase.It promotes the survival and differentiation of neurons.The development of small molecule Trk agonists of non-peptides and neurotrophic factor simulants can avoid a number of shortcomings of neurotrophic factors while agitating trk receptor signal transduction.It may provide a novel therapeutic approach for the treatment of nervous system diseases.