5.Preparation and Application of Naringin Sensor Based on Molecularly Imprinting Technique
Xiuling MA ; Riyao CHEN ; Xi ZHENG ; Xiao CHEN ; Zhen CHEN
Chinese Journal of Analytical Chemistry 2010;38(1):100-104
The sensor of naringin(NG), a non-electroactive substance, was prepared based on the molecular imprinting technique.Using cyclic voltammetry technique (scan rate is 100 mV/s), the naringin imprinting sensitive film, poly-o-aminophenol was coated on the surface of a graphite electrode in the presence of naringin which was considered as the template, and characterized by SEM and X-ray reflective spectrophotometry (XRR).Using K_3Fe(CN)_6 as an electroactive marker, the electrochemical properties of the NG sensor were investigated by CV, electrochemical impedance spectroscopy (EIS), differential pulse voltammmetric and chronoamperometric.The results showed that the imprinted electrode was significantly different from the non imprinted electrode in morphologies and electrochemical properties, and a linear relationship between the peak current and the naringin concentration was found in the range of 6.0 × 10 ~(-5)-1.4 × 10 ~(-4) mol/L with a detec tion limit of 1.6 × 10 ~(-5) mol/L.Moreover, the imprinted electrode exhibited a good selectivity and rapid response to the naringin template molecules, as well as an excellent reproducibility(RSD = 1.8 %, n=5).
6.Preliminary application of voxel-based morphometry technique on brain changes in neuromyelitis optica
Hui XIAO ; Lin MA ; Ziqian CHEN ; Xin LOU ; Zhiye CHEN
Chinese Journal of Radiology 2011;45(4):336-340
Objective To investigate the changes of brain volumes in neuromyelitis optica (NMO)patients using voxel-based morphometry (VBM) method, and preliminarily explore the pattern of cerebral anatomical impairment. Methods Twenty-three clinically defined NMO patients and 15 gender and age matched healthy volunteers underwent 3-dimensional (3D) fast spoiled gradient echo (FSPGR) sequence scanning on 3.0 Tesla MR systen. Raw data was processed and analyzed using statistical parametric mapping (SPM) 5. Whole brain volumes included grey matter volume (GMV), white matter volume (WMV), total intracranial volume (TIV), grey matter fraction (GMF), white matter fraction (WMF),brain tissue fraction (BTF) and regional brain volumes between the two groups were compared by independent samples t-test and an Pearson were performed to compare the regional brain volumes and the ages. Results GMV of NMO group[(610. 2 ± 55.0) ml] was significantly decreased comparing to healthy control group[(657. 2 ± 36. 3) ml] (t = - 2. 915, P < 0. 05). The age of NMO patients [(40 ± 9) years old] showed negative correlation with GMF [(42. 5 ± 2. 6) %] (r = - 0. 673, P < 0. 05). Regional brain volume analysis showed decreased GMV in left insula and bilateral posterior cingutates in NMO patients,while decreased WMV was found in left frontal and left parietal white matter. Conclusion VBM could detect brain volume changes sensitively. Total grey matter volume in NMO patients was decreased comparing to HC group. Regional grey matter atrophy in NMO patients occurred in left insular and bilateral posterior cingutates, regional white matter atrophy occurred in left frontal and left parietal lobe.
7.Changes of physical activity status of residents in Beijing Yayuncun community
Wanxiang XIAO ; Feng XIAO ; Yan LI ; Yanlan XIAO ; Yi SONG ; Ruili LI ; Jun MA ; Bowen CHEN
Chinese Journal of General Practitioners 2010;09(7):457-460
Objective To evaluate the changes of physical activity status of residents in Beijing Yayuncun(Asian Games Village)Community.Methods A total of 1765 permanent residents over 15 from 600 families living in Yayuncun Communities since 2000 were selected in this prospective study.Thebaseline survey was carried out with the Questionnaire for Residents of Beijing Typical Community in 2004 and 2005.From 2006 to 2008,same questionnaire was used for the follow-up survey,and 1412 residents were responded to the questionnaire.Results The knowledge levels related to physical exercise of Yayuncun residents elevated(P<0.01).The source of knowledge gain from Olympics Games promotion,specialized community lectures and intemet increase significantly(P<0.01),that from other media decreased(P<0.01).The exercise rate in community was higher than in other sites(P<0.01)and increased significantly (P<0.05);while doing exercise in charged sites decreased(P<0.05).Logistic regression analysis showed that regular physical exercise was related to age,BMI,exercise-related knowledge,exercise sites,attitude for sport facilities and chronological order.Conclusion During the preparation for the Beijing Olympic Games.the status of physical exercise of residents in Yayuncun Community presented the positive trends.
8.Analysis of the Costs of Various Drugs Consumed in 36 Hospitals of Guangzhou in the Years 1997~ 2000
Qinghuan WU ; Xizhou XIAO ; Lingyan MA ; Caiyun CHEN
China Pharmacy 2001;12(5):285-286
OBJECTIVE: To analyze the trend of costs of various drugs consumed in hospitals of Guangzhou METHODS: The data were derived from the Hospital Purchasing of Drug Information System in Guangzhou from 1997 to 2000 The expense of each drug was calculated at the price of that year RESULTS: The annual increasing rates of drug expenses in 1998, 1999 and 2000 were 17 01% , 24 49% , 23 11% respectively CONCLUSION: It is a matter of great urgency to rationally use drugs, to eliminate the waste of resources and to lighten the patients'burden
9.Exploration of Rational Ethylparaben Contents in Chloramphenicol Eye Drops
Huang XIAO ; Jiheng LIN ; Wansheng CHEN ; Shihong MA ; Changqin HU
China Pharmacist 2014;(5):785-788
Objective: To study whether domestic chloramphenicol eye drops with different ethylparabenin content meet the re-quirements in Chinese Pharmacopoeia. Methods:Antimicrobial effect test was used to examine the antimicrobial effect of the different eye drops. Results:The antimicrobial effect of the eye drops was in compliance with the requirements in the pharmacopoeia. Conclu-sion:The ethylparabenin concentration in the eye drops is higher than necessary. Boric acid and borax not only can adjust pH, but also show antimicrobial effect.
10.Application of endoscope emergency operation in the treatment of gastric variceal bleeding
Weili CHEN ; Yudong MA ; Guangxian XIAO ; Chao LI
Chinese Journal of Primary Medicine and Pharmacy 2013;20(11):1613-1614
Objective To explore the clinical effect of endoscope emergency operation in the treatment of gastric variceal bleeding.Methods According to the digital table,90 patients with acute bleeding gastric varices were randomly divided into the control group and the observation group,each group 45 cases.The control group only received drug treatment,and the observation group was given endoscopic therapy.The clinical effect of the two groups were compared.Results The immediate hemostatic rate,rebleeding rate,varicose veins subsided total efficiency of the observation group were 100.00%,17.78%,86.67%,respectively,which were better than those of the control group (84.44%,44.44%,28.89%) (x2 = 5.72,P < 0.05).Conclusion Endoscope emergency operation combined with oral drug in treatment of gastric variceal bleeding has good effect,can achieve rapid hemostasis,prevent recurrence,and it is worthy of clinical application.