RP-HPLC法测定维生素E霜的含量

目的:测定维生素E霜中维生素E的含量。方法:采用反相高效液相色谱法,色谱柱:D iamonsilTM(钻石)C18柱,流动相:甲醇-氯仿(85∶15),流速:1.0 m l.m in-1,检测波长284 nm,柱温40℃。结果:维生素E的平均回收率为99.79%,方法精密度(RSD)为0.20%(n=6)。结论:该法可用于维生素E霜中维生素E的含量测定。     

HPLC法测定银黄含片中绿原酸和黄芩苷的含量

目的测定银黄含片中绿原酸和黄芩苷的含量。方法采用反相高效液相色谱法,D iamonsilTMC18柱,甲醇-水-磷酸(体积比52∶48∶0.1)为流动相,流速为0.9 mL.m in-1;检测波长324 nm;柱温为室温。结果绿原酸在1.50~45.00μg.mL-1浓度范围内呈良好的线性关系,平均回收率为98.1%,方法精密度(RSD)为0.38%(n=5)。黄芩苷在45.00~135.0μg.mL-1浓度范围内呈良好的线性关系,平均回收率为98.9%,方法精密度(RSD)为0.14%(n=5)。结论该法简便、准确,能有效地控制该制剂的质量。     

复方肝浸膏胶囊（片）中维生素 B1、B2的含量及含量均匀度测定

目的:建立复方肝浸膏制剂中维生素B_1、B_2的含量及含量均匀度测定方法。方法:采用HPLC法,色谱柱为C18柱,流动相为甲醇:0.02 mol/L庚烷磺酸钠水溶液(含0.1%三乙胺,用磷酸调节pH至5.5(20∶80)),检测波长为260 nm,流速为1.0 m L/min,柱温为30℃。结果:维生素B11.9~62.0μg/m L线性良好(R~2=0.999 8),平均回收率101.33%,RSD为0.79%(n=6),维生素B20.5~16.0μg/m L线性良好(R~2=0.999 7),平均回收率97.64%,RSD为1.38%(n=6)。结论:本文所建立的HPLC含量测定方法简便、快速、准确,可用于复方肝浸膏制剂中维生素B1、B2的含量测定及含量均匀度测定。     

保健食品中维生素B1、B2、B6和烟酰胺同时测定方法的改进

目的:同时测定保健食品中维生素B₁、维生素B₂、维生素B₆(盐酸吡哆醇)和烟酰胺含量方法的改进。方法:以乙腈-0.005mol/L的癸烷磺酸钠0.1%磷酸为流动相等度洗脱,用ZORBAX SB-C18色谱柱,采用二极管阵列检测器(DAD)同时在260nm、280nm波长处测定维生素B₁、维生素B₂、维生素B₆(盐酸吡哆醇)和烟酰胺含量。结果:各成分在色谱柱上均能有效分离,且线性关系良好,回收率为98.3%～108.9%,相对标准偏差(RSD)为2.08%～2.50%。维生素B₁、维生素B₂、维生素B₆不同国标方法测定结果比较,其中维生素B₁不同结果的RSD为4.3%～5.6%,维生素B₂不同结果的RSD为5.1%～6.1%,维生素B₆不同结果的RSD为1.8%～3.8%。结论:该方法简捷高效,精密度好,可代替其他几种方法同时对...     

HPLC法测定醋酸地塞米松软膏中醋酸地塞米松的含量

目的 :测定醋酸地塞米松软膏中醋酸地塞米松的含量。方法 :采用反相高效液相色谱法 ,KromasilC18色谱柱 ,ψ(甲醇∶水 ) =70 ∶30为流动相 ,流速为 1.0mL·min-1,检测波长 2 4 0nm ,柱温为室温。结果 :醋酸地塞米松在 5 .2～ 5 2 μg·mL-1浓度范围内线性关系良好 (r=0 .9999) ,回收率为 10 0 .4 % ,方法精密度 (RSD)为 0 .96 % (n =6 )。结论 :本法简便、准确 ,能有效地控制该制剂的质量     

RP-HPLC法测定密蒙花中毛蕊花苷的含量

目的　测定密蒙花中毛蕊花苷的含量 ,为药材及其制剂的质量控制提供依据。方法　采用 RP- HPL C法测定药材中毛蕊花苷含量。色谱条件 :Inertsil ODS- 3C1 8色谱柱 ( 5μm,2 5 0 m m× 4 .6 m m) ;流动相 :甲醇 -乙腈 - 1%醋酸水溶液 ( 8∶ 16∶ 76 ) ;检测波长 :2 5 4 nm。通过正交实验确定最优提取方案为 :2 0倍量的 70 %乙醇回流提取 1.0h。结果　该分析方法可以使样品达到基线分离 ,毛蕊花苷的保留时间约 14 min。该方法具有良好的精密度、重现性和稳定性 ,平均回收率为 10 0 .71% ,RSD=1.4 1% ;线性关系良好 ,相关系数为 0 .9999。用同样方法测定了 10个不同产地密蒙花药材中毛蕊花苷的含量 ,在 0 .79%～ 2 .30 %。结论　该分析方法快速 ,简单 ,无需对样品进行太多柱前处理 ,即可达到基线分离 ,测量结果准确 ,适用于密蒙花药材中毛蕊花苷的含量测定 ,为密蒙花药材及制剂的质控提供依据     

HPLC-ELSD法测定刺蒺藜中甾体皂苷TTS-12含量

目的:对刺蒺藜全草中的替告皂苷元3-O-β-D-吡喃木糖(1→2)-[β-D-吡喃木糖(1→3)]-β-D-吡喃葡萄糖(1→4)-[α-L-吡喃鼠李糖(1→2)]-β-D-吡喃半乳糖苷(TTS-12)进行含量测定.方法:对刺蒺藜全草70%乙醇提取物经前处理后采用HPLC-ELSD法测定TTS-12含量.测定条件为C18柱(5 mm×250 mm,5 μm),甲醇∶水=90∶10(V/V)为流动相,流速1 ml·min-1;漂移管温度:40℃;气体(N2)压力:2×105 Pa,进样量20 μl.结果:线性范围为0.103 3～1.033 mg·ml-1,回归方程:lnc=0.669 0 lnA-3.058 1(r=0.999 9),精密度、稳定性和重现性试验的RSD分别为0.15%(n=6)、0.24%(n=9)、1.43%(n=6),加样回收率为95.07%,RSD为3.02%.刺蒺藜全草中TTS-12的平均含量为0.068 94%(质量百分数).结论:该法为蒺藜中甾体皂苷TTS-12的含量测定提供了简便、快速的方法.     

浅谈用HPLC法测定复合维生素制剂中维生素C含量的效果

目的:探讨分析用HPLC法检测复合维生素制剂中维C含量的效果。方法:采用Diamonsil C18柱检测复合维生素制剂中的维C含量,同时以甲醇、0.1%磷酸溶液(2:98,V/V)作为流动相,流速为0.8ml.min-1,检测波长为242nm。结果:维生素C在0.17~1.7?g范围内,可呈现良好的线性关系,其平均回收率为100.1%,RSD=0.6%(n=6)。结论:该方法可快速、准确的测定维生素C的含量,值得进一步推广使用。     

HPLC法测定养血补肾口服液中2,3,5,4′-四羟基二苯乙烯-2-O-β-D-葡萄糖苷的含量

目的 :为养血补肾口服液建立专属性含量测定方法。方法 :采用高效液相色谱法对 2 ,3 ,5 ,4′ 四羟基二苯乙烯 2 O β D 葡萄糖苷进行了含量测定 ,采用KromasilC1 8柱 ,流动相为 ψ(乙腈 ∶水 ) =2 5∶75。结果 :线性范围 0 .0 3 3 92～ 2 .713 6μg ,平均回收率为 98 3 7%,RSD =1.0 0 %(n =5 )。结论 :本法操作简便 ,易行 ,具有实用性。     

注射用哌拉西林钠舒巴坦钠HPLC法含量测定

用HPLC法 ,ODS柱 ,0 .0 0 5mol/L四丁基氢氧化铵磷酸缓冲液 (PH =5 .0 ) -乙腈 ( 81∶19)为流动相 ,检测波长 2 30nm ,柱温 30℃ ,测定哌拉西林纳 /舒巴坦钠的含量。哌拉西林在 0 .0 8～ 1.6 0mg/ml范围 (r1=0 .9996 ) ,舒巴坦在 0 .0 4～ 0 .80mg/ml范围 (r2 =0 .9992 ) ,质量浓度与峰面积线性关系良好。日内精密度良好 (哌拉西林RSD =0 .6 6 % ,舒巴坦RSD =0 .73% ,n =6 )。该法简便准确 ,可用于该制剂的含量测定。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

Scientific principles and rigorous processes should be followed in developing clinical guidelines for therapeutic interventions of integrative medicine

A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care（~＇4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.