反相高效液相色谱法测定注射用盐酸米诺环素含量

目的:探讨用反相高效液相色谱法(RP-HPLC法)测定注射用盐酸米诺环素中盐酸米诺环素含量.方法:采用Waters 2690-996高效液相色谱仪,以Nucleodur C18柱(250 mm×4.6 mm,5μm)为色谱柱,流动相为乙腈-水-三氟乙酸(15:85:0.1,V/V),流速为1.4 mL/min,检测波长为350 nm.结果:盐酸米诺环素的浓度在(12.5～800)μg/mL范围内与峰面积线性关系良好(r=0.999 9),平均回收率为103.24%,RSD=0.52%.结论:该方法操作简便、灵敏、快速,适用于盐酸米诺环素的含量测定.     

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.     

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;     

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。     

高效液相色谱法测定脂质体中硝酸益康唑的含量及其理化性质的考察

目的:高效液相色谱法测定硝酸益康唑脂质体中药物的含量并考察其理化性质.方法:建立了用色谱预处理柱除磷脂测定脂质体中药物含量的HPLC法,并用此法测定了硝酸益康唑的溶解度和分配系数.结果:此法可以除去大部分磷脂,具有较好的专属性、回收率和精密度;硝酸益康唑在水,生理盐水,20%PEG生理盐水中的溶解度分别为(879.4±42.9),(361.6±23.8),(3006.5±60.4)mg·L,油/水,表皮/水和真皮/水分配系数为45.4,4.82×105和5.31×105.结论:此法适于测定硝酸益康唑脂质体中药物含量;硝酸益康唑对表皮和真皮有较强的亲和力,适于皮肤给药.     

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.     

藤茶叶的扫描电镜鉴别研究

目的为准确鉴别药用藤茶的来源提供依据.方法对藤茶主要药用部位叶及叶柄进行了扫描电镜研究.结果叶上表面角质层厚、多非腺毛,下表面角质层纹理沿细胞壁方向延伸,叶横切面可见大型分泌腔,叶柄表面有稀疏非腺毛及细纵纹.结论电镜方法快速准确,尤以角质层纹理、表面非腺毛的鉴别特征特异性强.