薄层扫描法测定血栓心脉宁中脂蟾毒配基的含量

目的测定血栓心脉宁中脂蟾毒配基含量。方法血栓心脉宁用氟仿回流提取后,硅胶GF     

双波长薄层扫描法测定痛得安胶囊中新乌头碱的含量

目的：建立痛得安胶囊中新乌头碱的含量测定方法。方法：采用双波长薄层扫描法,以正己烷－乙酸乙酯－无水乙醇－氨水（１２：８：２．５：０．５）为展开剂,碘化饿钾试液为显色剂,测定该制剂中新乌头碱的含量。结果：线性范围为１～６ｕｇ。平均回收率为９４．８０％,ＲＳＤ为２．０３％。结论：本法操作简便。结果可靠。实用,适合该制剂中新乌头碱的含量测定。     

Bile salt-induced apoptosis involves NADPH oxidase isoform activation

BACKGROUND & AIMS: Hydrophobic bile salts trigger a rapid oxidative stress response as an upstream event of CD95 activation and hepatocyte apoptosis. METHODS: The underlying mechanisms were studied by Western blot, immunocytochemistry, protein knockdown, and fluorescence resonance energy transfer microscopy in rat hepatocytes and human hepatoma cell line 7 (Huh7). RESULTS: The rapid oxidative stress formation in response to taurolithocholate-3-sulfate (TLCS) was inhibited by diphenyleneiodonium, apocynin, and neopterin, suggestive for the involvement of nicotinamide adenine dinucleotide phosphate (NADPH) oxidases. TLCS induced a rapid serine phosphorylation of the regulatory subunit p47phox, which was sensitive to inhibition of sphingomyelinase and protein kinase Czeta (PKCzeta). Inhibitors of p47phox phosphorylation and p47phox protein knockdown abolished the TLCS-induced oxidative stress response and blunted subsequent CD95 activation. Consequences of TLCS-induced oxidative stress were c-Jun-N-terminal kinase activation and Yes-dependent activation of the epidermal growth factor receptor (EGFR), followed by EGFR-catalyzed CD95 tyrosine phosphorylation, formation of the death-inducing signaling complex, and execution of apoptosis. As shown by fluorescence resonance energy transfer experiments in Huh7 cells, TLCS induced a c-Jun-N-terminal kinase-dependent EGFR/CD95 association in the cytosol and trafficking of this protein complex to the plasma membrane. Inhibition of EGFR tyrosine kinase activity by AG1478 allowed for cytosolic EGFR/CD95 association, but prevented targeting of the EGFR/CD95 complex to the plasma membrane. Both processes, and TLCS-induced Yes and EGFR activation, were sensitive to inhibition of sphingomyelinase, PKCzeta, or NADPH oxidases. CONCLUSIONS: The data suggest that hydrophobic bile salts activate NADPH oxidase isoforms with the resulting oxidative stress response triggering activation of the CD95 system and apoptosis.     

薄层扫描法测定首清颗粒中黄芪甲苷的含量

目的建立首清颗粒中黄芪甲苷含量的测定方法。方法采用薄层扫描法,硅胶G薄层预制板,氯仿-甲醇-水（13：6：2）10℃以下放置过夜的下层溶液为展开剂,测定波长530nm,参比波长700nm。结果黄芪甲苷点样量在0．22～0．73μg之间与吸收度积分值呈良好的线性关系,平均回收率为97．72％,RSD=0．69％。结论该法便捷、灵敏、准确,可作为首清颗粒的质量控制方法。     

双波长薄层扫描法测定西灵生白口服液中黄芪甲甙的含量

采用双波长薄层扫描法测定西灵生白口服液中黄芪甲甙的含量,样品直接采用水饱和的正丁醇萃取,进行薄层层析。展开剂:氨仿-甲醇-水(13:6:2);波长λ_s=530nm,λ_R=700nm。黄芪甲甙的平均回收率为95.52％(RSD=2.29％,n=6)。并对方法学的稳定性进行了考察,本法灵敏度高,重现性好,结果满意。     

积雪草提取纯化工艺的研究

目的研究积雪草的提取纯化工艺。方法采用正交试验进行工艺优化,薄层色谱扫描法测定羟基积雪草苷含量。结果提取工艺最佳条件为:水提取2次,第1次加10倍量水提取2h,第2次加8倍量水提取1.5h。纯化工艺最佳条件为壳聚糖用量0.4mL/g,药液浓缩比例1.2:1,絮凝温度70℃。结论本方法可节省原料,缩短工时,降低成本,利于工业化大生产。     

薄层扫描法测定祛浊胶囊中熊果酸的含量

用薄层扫描法测定祛浊胶囊中熊果酸的含量。方法　以氯仿-醋酸乙酯-冰醋酸(5∶3∶0 .1)为展开剂,λS=5 30nm,λR=70 0nm。结果　平均回收率为97 .10 %,RSD =0 . 83%。结论　该方法简便,准确,可用于控制该产品的质量     

薄层扫描法测定坤元通乳口服液中人参皂苷Re的含量

目的研究坤元通乳口服液的质量控制指标.方法采用薄层扫描法对人参中主要有效成分人参皂苷Re的含量进行了测定.结果该方法的线性范围为0.28～2.27 μg,平均回收率为96.90%,RSD为2.37%.结论方法可行,专属性强,重复性好,能有效地控制该制剂的质量.     

薄层扫描法测定抗感冒片中绿原酸的含量

目的：测定抗感冒中绿原酸的含量,方法：用乙醇提取并制成供试品,以薄层扫描法测定,λs＝333nm,λR=220nm,结果：平均回收率98．7％,RSD＝1．87％,三批样品中绿原酸的含量分别为2．455mg/片,2．368mg/片,2．262mg/片。结论：本法简便,准确,灵敏,可作为该制剂的质量控制方法。     

色谱与X射线衍射技术在中成药鉴定中的联合应用

目的:将薄层色谱法与 X 射线衍射法联合用于黄连上清丸中成药的鉴定。方法:依据2000年版中国药典一部的薄层扫描含量测定方法,点于同一硅胶 G 薄层板上,以苯-乙酸乙酯-甲醇-异丙醇-水(20:10:5:5:1)为展开剂,氨蒸气饱和,进行荧光扫描,波长入=366nm,采用外标两点法测定计算;并采用 X 射线 Fourier 指纹图谱分析方法,分别对3个厂家的黄连上清丸样品进行测定,粉末 X-衍射的条件为 CuKα,管压40kV,管流150mA,扫描步长0.02°,扫描速度8°·min~(-1)。结果:获得了黄连上清丸中小檗碱的薄层扫描含量及黄连上清丸的 X 射线 Fourier 指纹图谱。结论:2种谱学方法的联合使用,可以获得中成药整体结构特征与药典指定的部分化学成分分析。