甘肃产当归的商品规格与其阿魏酸含量的相关性初探

采用高效液相色谱法测定不同商品规格的甘肃产当归中阿魏酸含量,对当归的商品规格与阿魏酸含量的关系进行初步探索.结果表明:当归的商品规格等级高低与阿魏酸含量之间无明显相关性.     

紫外分光光度法测定盐酸川芎嗪氯化钠注射液中盐酸川芎嗪含量

目的:建立盐酸川芎嗪氯化钠注射液中盐酸川芎嗪的含量检测方法.方法:采用紫外分光光度法,检测波长为295nm.结果:盐酸川芎嗪在3.0～15.0μg·ml-1范围内呈良好线性关系(r=1.0000,n=5),回收率为100.3%,RSD为0.65%(n=5).结论:本法操作简便、快捷,结果准确,尤适用于药厂、医院对该制剂半成品的质量控制和快速分析.     

穿心莲内酯微囊的制备及溶出度考察

目的:研究以丙烯酸树脂Ⅳ号为囊材的穿心莲内酯微囊的制备方法及其体外溶出特点.方法:采用液中干燥法制备穿心莲内酯微囊,并按<中国药典>方法测定体外溶出度.结果:该法制备的穿心莲内酯微囊,在水中药物几乎没有溶出,而在酸性溶出介质中则可快速释放.结论:该方法所制备微囊不仅可以有效掩盖穿心莲内酯的苦味,而且在胃液中能够快速释放.     

DHS治疗股骨转子部骨折的临床应用体会

随着社会人口老龄化,股骨转子部骨折的发生率不断增高。虽然股骨转子部血运丰富,骨折容易愈合;但是如果处理不当,仍然可能预后功能不良。笔者回顾了我科自2001年8月至2004年5月期间应用动力髋螺钉(DHS)内固定治疗89例股骨转子部骨折,报道如下。临床资料本组89例,男33例,女56例;     

零售连锁药店在我国发展潜力巨大

我国医药商业领域要建立规范有序的药品流通市场,零售连锁是一种重要的营销方式.由于具有独特优势,目前这种商业运作模式得到了广泛的认同.     

补肾方含药血清促进PC12细胞增殖及其拮抗谷氨酸神经毒作用的研究

目的运用中药血清药理学方法研究补肾复方含药血清(BS)促进体外培养的PC12细胞增殖及其拮抗谷氨酸兴奋性神经毒损伤的作用.方法以MTT法观察BS对体外培养的PC12细胞活力的影响及其拮抗谷氨酸损伤的作用,采用流式细胞仪观察BS对谷氨酸所诱导PC12细胞凋亡的影响.结果 BS含药血清可以增强PC12细胞活力,拮抗谷氨酸的兴奋性神经毒作用且在20%浓度时作用最强,并且能够抑制谷氨酸诱导的PC12细胞早期凋亡.结论补肾方BS可能具有神经保护作用.     

Novel estrogen receptor ligands and their structure–activity relationship evaluated by scintillation proximity assay for high‐throughput screening

The estrogen receptor (ER) is an important drug target with allosteric characteristics that binds orthotopic hormones and other ligands. A recently developed scintillation proximity (SPA)‐based assay for high‐throughput screening (HTS) of compound libraries was used to identify novel estrogen receptor ligands that might have ER subtype selective binding activity. Radioligand binding was determined in a multi‐detector scintillation counter designed for microtitration plates. Equilibrium binding experiments and kinetic competition tests were performed with [³H]‐estradiol and human ERα and ERβ receptors. A library of 6,000 structurally diverse compounds was screened. From this, several novel ligands were identified that showed pronounced subtype‐selective differences in ligand binding for ERα and ERβ. The observed equilibrium dissociation constant (K_d) for the binding of [³H]estradiol to ERα and ERβ receptors were approximately 0.25 and 0.64 nM, respectively. When 17β‐estradiol, raloxifene and daidzein were tested for binding affinity to ERα in a competition assay, the IC₅₀ values were 0.34, 1.31, and 75.6 nM, respectively. When tested for binding affinity to ERβ, the IC₅₀ values were 1.05, 11.4, and 10.6 nM, respectively. The results obtained show that the methodology is valid in comparison to previously published data regarding estradiol and other standard compounds (raloxifene and daidzein) binding characteristics of estrogen receptors. The assay is also well suited to applied research as a tool in HTS of compound libraries in the search of ER ligands. Several novel active compounds were identified and selected as potent ER subtype ligands. Drug Dev Res 64:203–212, 2005. © 2005 Wiley‐Liss, Inc.     

经方医学新论(续)

张仲景的《伤寒论》和《金匮要略》是经方医学的代表性著作，尽管其在中医学的发展历史中，不断地融入了医经医学的思想。前文认为，经方医学的科学性就在于经方医学严格地定义了每一个方剂。近年来，对汉代度量衡的研究取得了重要成果，许多学者对以容器计量和以个数计量的药物进行了实测，这些成果使我们能够对经方在古代的运用有了更明确的认识，也使我们能够准确地描述每一个经方。     

心脑静颗粒剂对血流动力学及心肌缺血的影响

目的:观察心脑静颗粒对血流动力学及心肌缺血的影响.方法:麻醉犬十二指肠给药,用压力换能器经四道生理记录仪进行血压描记,采用冠状窦插管法用电磁流量计测量冠状窦的血流量,同时用玻璃注射器分别抽取股动脉血和冠状窦血在全自动血气分析仪进行血氧含量的测定,并进行冠脉阻力、心肌氧摄取率和心肌耗氧量的计算;麻醉犬十二指肠给药,结扎冠状动脉前降支,通过心外膜电图观察心肌缺血程度(∑-ST)和缺血范围(N-ST);通过左心室插管观察左心室内压(LVP)和最大上升速率(±dp/dt)的变化.结果:心脑静2g/kg、4g/kg对麻醉家犬的血压无明显影响,对冠脉血流量有明显的增加,明显降低冠脉阻力和动、静脉氧之差,明显增加心肌耗氧量,降低心肌氧摄取率;对心肌缺血程度(∑-ST)和缺血范围(N-ST)均有明显的改善.结论:心脑静对麻醉家犬的血流动力学及心肌缺血有一定的改善作用.     

HPLC法同时测定地氯滴眼液中地塞米松磷酸钠及氯霉素含量

目的建立地氯滴眼液中主要成分地塞米松磷酸钠、氯霉素的高效液相色谱含量测定方法.方法色谱柱为Hypersil ODS C18(250 mm×4.6 m,5 μm),流动相为甲醇-0.34%的磷酸二氢钾水溶液(52:48,v/v),柱温25℃,检测波长240nm,内标:0.14 mg·mL-1氢化可的松.结果在0.1004～0.401 6 mg·mL-1范围内,地塞米松磷酸钠线性良好(r=0.999 98),回收率为102.5%,RSD=2.2%(n=9);在1.014 4～4.057 6 mg·mL-1范围内,氯霉素线性良好(r=0.999 98),回收率为101.8%,RSD=1.5%(n=9).结论该实验建立的分析方法灵敏、快速、准确.