1.HPLC Fingerprint of Semen Cassiae
Chinese Traditional and Herbal Drugs 1994;0(03):-
Objective To establish HPLC fingerprint for the identification of Semen Cassiae. MethodsChromatographic fingerprint of Semen Cassiae was investigated by RP-HPLC and the gradient elution mode was applied to chromatographic separation. Data were analysed by fingerprint similarity evaluation software to compare the similarity of the samples. ResultsThe HPLC fingerprint of Semen Cassiae was established preliminarily. ConclusionHPLC Fingerprint method is repeatable and can be used in quality control of Semen Cassiae.
4.Effects of controlling arterial oxygen partial pressure during cardiopulmonary bypass on myocardial protection of chronic hypoxic heart
Ping CHEN ; Jingfang ZHANG ; Xiaohua ZHANG
Chinese Journal of Thoracic and Cardiovascular Surgery 2003;0(03):-
Objective To evaluate the effects of controlling arterial oxygen partial pressure (PaO 2) at the beginning and during cardiopulmonary bypass (CPB) on cyanotic myocardial protection. Methods 40 Children suffering from tetralogy of Fallot(TOF) under 3 years of age with SpO 2
5.Biofeedback therapy for myogenic fecal incontinence
Daqing SUN ; Ping ZHAO ; Yuli CHEN ; Jinliang LI ; Ping ZHANG
Chinese Journal of General Surgery 2001;0(07):-
Objective To evaluate the effect of biofeedback therapy for the treatment of myogenic fecal incontinence. MethodsA general assessment about anorectal function was made on 17 cases receiving biofeedback therapy including muscle power training,sensory training and coordination training. Results The clinical scores before and after biofeedback therapy were 1.66?0.23,3.80?0.42 respectively,with an effective rate of 82%. The anus maximum contracting pressure elevated,(73?20) mm Hg vs. (123?30) mm Hg; myoelectric amplitude increased,(122?32) ?V vs. (230?41) ?V;Contracting time prolonged,(4.1?2.0) s vs. (9.4?3.0) s; The sensory threshold was lowered,(50?12) ml vs. ( 20? 10) ml;The feel-contract time increased,(3.1?0.4) s vs. (1.2?0.3) s. Positive rectal contraction reflex was seen in 41% patients before therapy compared with 82% after therapy. Conclusions Biofeedback therapy increases contractility of sphincter,decreases threshold of rectal sensory,and is a therapy of choice for myogenic fecal incontinence.
6.Clinical experiences of laparoscopic common bile duct exploration (60 cases)
Ping CHEN ; Ping BIE ; Shuguang WANG ; Leida ZHANG ; Jiahong DONG
Chinese Journal of General Surgery 1993;0(02):-
6, 39 cases were with 3~6, 13 cases were with the number less than 3. The diameter of stones was 0.5~1.2 cm. Five cases suffered from bile leakage, 2 cases from peritonitis and 2 cases from remnant stones in the common bile duct. Forty-one patients were followed up and doing well. Conclusions Surgical approach is choosen on the basis individually. Laparoscopic common bile duct exploration for gallstone concomittant with choledocholithiasis is safe.
7.Determination of Clindamycin Phosphate in Compound Sodium Phenytoin Gels by HPLC
Ji ZEWU ; Zhang FANG ; Chen PING
China Pharmacist 2015;(4):690-691
Objective:To establish an HPLC method for the determination of clindamycin phosphate in compound phenytoin sodi-um ge1s. Methods:The HPLC analysis was carried out on a ZORBAX SB-C18 column(250 × 46 mm,5 μm)with 0. 1 mol·L-1 KH2PO4 solution(adjusting pH to 2. 5 with H3PO4 solution)-acetonitrile(75:25)as the mobile phase at the flow rate of 0. 8 ml· min-1 . The detection wavelength was 210 nm,the column temperature was 25℃ and the injection volume was 10μl. Results:The lin-ear range of clindamycin phosphate was 3. 00-18. 00 μg(r=0. 999 5). The average recovery was 101. 11%(RSD=0. 34%,n=6). Conclusion:The method is simple,sensitive and reproducible,and can be used in the determination of clindamycin phosphate in com-pound phenytoin sodium gels.
8.The incidence rate of congenital malformations in Xintai City from 2010 to 2013 and their risk factors
Ping YANG ; Xiaoyun CHEN ; Ming ZHANG
Chinese Journal of Applied Clinical Pediatrics 2015;(14):1072-1075
Objective To analyze the incidence rate of congenital malformations in Xintai City from January 2010 to December 2013,and to investigate the risk factors for neonatal malformations. Methods A total of 21 463 ca-ses of perinatal infants pregnant for 28 weeks later to postpartum 7 d in Xintai city from January 2010 to December 2013 were retrospectively analyzed. The congenital malformations detection data were analyzed. The risk factors were analyzed by univariate and Logistic analysis methods. Results There were 281 cases with congenital malformations were identi-fied out,and the congenital malformation rate was 1. 31%(281 / 21 463 cases). The incidence rates of multi - finger (toe)[0. 24%(52 / 21 463 cases)],cleft lip[0. 23%(49 / 21 463 cases)],and congenital heart disease[0. 22%(47 /21 463 cases)]were the main congenital malformations. Total malformation rates in the year of 2010,2011,2012,and 2013 were similar(1. 26% ,1. 25% ,1. 33% ,1. 26% ,Z = - 1. 826,P = 0. 068). Univariate and Logistic regression analysis results showed that birth weight,parity,births number,gestational age,educational level,residence,income,ill-ness history,exposure to pesticides,hepatitis,influenza,severe vomiting of pregnancy,threatened abortion,threatened premature,contraceptives,smoking history,drinking history,and father's chronic disease were the risk factors for neo-natal congenital malformations( χ2 = 10. 212,4. 299,5. 860,5. 278,10. 422,9. 327,15. 680,127. 395,245. 735, 74. 141,718. 876,96. 414,77. 770,11. 300,9. 126,74. 927,68. 283,5. 450,P = 0. 001,0. 038,0. 015,0. 022, 0. 001,0. 002,0. 000,0. 000,0. 000,0. 000,0. 000,0. 000,0. 001,0. 001,0. 003,0. 000,0. 000,0. 020 ). Conclusions Neonatal congenital malformation is mainly determined by genetic and environmental factors. For childbearing age and pregnant women,targeted health education should be strengthened to reduce the incidence rate of congenital malformations.
10.Soluble expression and characterization of mouse lactate dehydrogenase-C4 in Escherichia coli
Duo ZHANG ; Yongzhong XIONG ; Ping CHEN
Medical Journal of Chinese People's Liberation Army 1983;0(02):-
Objective A prokaryotic expression vector was constructed by inserting the coding sequence of mouse sperm specific lactate dehydrogenase C into pET-28a(+)and the recombinant mLDHC44 protein was purified by Ni+-NTA agrose.Methods The cDNA of mouse sperm specific lactate dehydrogenase C was obtained by RT-PCR,with total RNA of mouse testis tissues as templates.The coding sequence of mouse LDHC4 was amplified by PCR with specific primers.This recombinant vector was transformed into Escherichia coli BL21(DE3).The recombinant mLDHC4 protein was induced by isopropy-?-D-thiogalactoside(IPTG)and identified by sodium dodecyl sulfate polyacrylamide electrophoresis and LDH activity determination.After purified with Ni+-NTA agrose,the mLDHC4 protein was probed with antisera from the pVAX1-mLDHC4 vaccine(the eukaryotic expression vector of mouse sperm specific lactate dehydrogenase C)immunized BALB/c mice by Western blot analysis.Results After digested with BamH I-EcoR I,the recombinant plasmids produced right fragment which was about 1000bp.Sequencing showed that the sequence of the cloned fragment was in agreement with sequence in GenBank.This recombinant vector was named as pET-28a(+)-mLDHC4.With induction of IPTG,The recombinant protein with molecular weight of about 35 kD was expressed and the enzyme activity of this protein was high.After purified with Ni+-NTA agrose,this mLDHC4 protein formed a specific band by sodium dodecyl sulfate polyacrylamide electrophoresis and probed with antisera from immunized BALB/c mice and then formed a specific band in the nitrocellulose membrane.Conclusion The coding sequence of mouse lactate dehydrogenase subunit C had been cloned into the prokaryotic expression vector pET-28a(+)and the mLDHC4 protein could be expressed at a high level,the specificity of this protein was high and the activity was strong.