复方陈香胃片中非法成分土大黄苷的检测

目的 建立定性检测复方陈香胃片中非法成分土大黄苷的方法.方法 采用TLC法、HPLC法对怀疑含有非法成分土大黄苷的复方陈香胃片进行分离分析,并采用HPLC - DAD法定性鉴别土大黄苷.结果 在复方陈香胃片中检测到含有非法成分土大黄苷.结论 所用方法专属性强、灵敏度高、操作简便,可作为检测非法成分土大黄苷的有效方法.     

UPLC法同时测定复方龙胆碳酸氢钠片中10种大黄蒽醌类成分及土大黄苷的含量

目的 建立同时测定复方龙胆碳酸氢钠片中10种大黄蒽醌类成分和伪品特征成分土大黄苷含量的方法,用于含大黄复方制剂的质量评价。方法 采用超高效液相色谱（UPLC）法对8个生产企业40批次复方龙胆碳酸氢钠片中10种大黄蒽醌类成分（芦荟大黄素-8-O-葡萄糖苷、大黄酸-8-O-β-D-葡萄糖苷、大黄酚-8-O-β-D-葡萄糖苷、大黄素-8-O-葡萄糖苷、大黄素甲醚-8-O-β-D-葡萄糖苷、芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚）和土大黄苷的含量进行测定。色谱柱为Agilent Eclipse Plus C18,流动相为乙腈-0.1%磷酸溶液（梯度洗脱）,流速为0.3 mL/min,柱温为30℃,进样量为5μL。结合主成分分析与聚类分析对含量测定结果进行综合分析,并对不同企业样品进行质量评价。结果 上述11种成分在各自检测质量浓度范围内线性关系均良好（r≥0.999 3）,精密度、重复性、稳定性试验的RSD均小于3%(n均为6),平均加样回收率为96.82%～98.92%(RSD≤1.74%,n=6);含量分别为0.011 7～0.252 0、0～0.323 3、0.131 3～1.2...     

大黄排毒胶囊的制备及质量标准研究

目的:制备大黄排毒胶囊并建立其质量控制标准。方法:采用高效液相色谱(HPLC)法对大黄的主要成分芦荟大黄素、大黄酸、大黄素、大黄酚进行定性、定量分析;采用薄层色谱法(TLC)用土大黄苷对照品进行大黄的真伪检查。结果:TLC中样品在土大黄苷对照品斑点相应位置无持久的亮紫色斑点;HPLC法测定制剂中芦荟大黄素、大黄酸、大黄素、大黄酚4种成分的含量,4种成分与其他成分分离良好;芦荟大黄素、大黄酸、大黄素、大黄酚浓度分别在1.07~21.36μg/m L、3.93~78.50μg/m L、0.85~16.92μg/m L、6.95~69.50μg/m L浓度范围内与峰面积有良好的线性关系,平均回收率分别为102.73%、100.86%、98.16%、100.07%,RSD分别为0.16%、0.14%、0.13%、0.64%。大黄排毒胶囊的质量稳定,其性状、水分、装量差异、崩解时限及芦荟大黄素、大黄酸、大黄素、大黄酚4种成分的总量等检验指标符合质量标准。结论:本制备工艺简单可行,所建立的质量标准可用于该制剂的质量控制。     

HPLC法测定栽培河套大黄中土大黄苷的含量

目的:建立 HPLC 法测定栽培河套大黄中土大黄苷的含量。方法:采用 ZORBAX Eclipse XDB—C_(18)(150 mm×4.6 mm,5μm)色谱柱,以甲醇-乙腈-水(35:5:60)为流动相,流速:1.0 mL·min~(-1),检测波长为320 nm,采用外标法定量测定。结果:土大黄苷进样量在0.206～2.06μg范围内与峰面积呈良好的线性关系(r=0.9998);平均回收率(n=6)为99.31%,RSD 为0.82%。结论:本方法操作简便,结果准确可靠,适用于栽培河套大黄中土大黄苷的含量。     

乙肝解毒胶囊中非法成分土大黄苷的检测

建立乙肝解毒胶囊中非法成分土大黄苷的定性检测方法.方法采用TLC、HPLC法分析怀疑掺有土大黄苷的乙肝解毒胶囊.结果在乙肝解毒胶囊中检测有土大黄苷.结论所建方法专属性强,可作为检测土大黄苷的方法.     

一清颗粒中土大黄苷检查方法的研究

目的对一清颗粒中大黄的质量进行研究。方法建立以土大黄苷为对照的TLC、HPLC和液质联用法检查土大黄苷的方法。结果薄层检查法适用于一清颗粒中土大黄苷的检查,并采用二极管阵列及液质联用法对结果进行验证,能鉴别出样品中所用正伪品大黄药材。结论上述3种方法均可用于控制一清颗粒中大黄的质量。     

对大黄中土大黄苷检测方法的改进

目的土大黄苷为含大黄类中成药中不应存在的成分。本文建立HPLC法定性鉴别及定量测定4种含大黄的中成药中土大黄苷的含量,监测常用中成药中大黄的质量。方法采用Lichrospher C18色谱柱,以乙腈-甲醇-水（7∶30∶63）为流动相,检测波长为320nm,流速为1.0mL·min^-1,外标法定量测定。结果土大黄苷在2.62～261.6μg·mL^-1范围内与峰面积呈良好的线性关系（r=0.9993）;平均回收率（n=9）为96.30%。结论本法简便准确,灵敏度高,通用性好,适用于含大黄的中成药中土大黄苷的定性鉴别及定量测定。     

正红花油中血竭掺伪龙血竭检查方法的研究

目的:建立正红花油中血竭掺伪的检测方法。方法:以7,4’-二羟基黄酮为指标建立薄层色谱(TLC)法,快速筛查正红花油中掺伪的龙血竭。TLC筛查出可疑样品,用超高效液相色谱串联质谱(UPLC-MS/MS)法进行确证并定量分析,采用SuperLu C₁₈(2)(100 mm×2.1 mm, 1.8μm)色谱柱,以乙腈-水(25∶75)为流动相,流速0.3 mL·min^-1,柱温25℃,选择m/z 253.1→117.1(定量)和m/z 253.1→91.0(定性)作为7,4’-二羟基黄酮检测离子对。结果:TLC方法专属性、耐用性良好。采用UPLC-MS/MS法,7,4’-二羟基黄酮质量浓度在0.470～37.58 ng·mL^-1范围内线性良好(r=0.999 7),加样平均回收率(n=6)为96.1%,RSD为3.2%。对30批正红花油进行薄层初筛,结果有24批疑似检出7,4’-二羟基黄酮。疑似样品通过UPLC-MS/MS验证,有24批正红花油超出拟定的限度,验证结果与TLC方法一致。结论:本方法快速,结果准确,灵敏度高,可...     

TLC、HPLC、UPLC-MS法联合定性检查厚朴排气合剂中的土大黄苷

目的建立厚朴排气合剂中土大黄苷的检测方法。方法采用薄层色谱（TLC）法鉴别土大黄苷,采用高效液相色谱（HPLC）法和超高效液相色谱．质谱联用（UPLC-MS）法对土大黄苷进行定性分析。结果2批次产品中检出土大黄苷。结论所建立的方法专属性强,灵敏度高,重现性好,可作为该类产品是否含有土大黄苷的检测方法。     

采用TLC和HPLC法检查炎可宁片中的土大黄苷

目的：建立TLC结合HPLC法检查炎可宁中的土大黄苷的检测方法;方法：采用硅胶G板,乙酸乙酯-丁酮-甲酸-水（10：7：1：1）为展开剂,在365nm下检视;采用Lichrospher C18（4．6mm×250mm,5μm）,乙腈-甲醇-水（7：30：63）为流动相,检测波长为320nm。结果：炎可宁片非法掺入的土大黄的指标性成分土大黄苷在365nm下显持久的蓝紫色荧光斑点。通过高效液相色谱法进一步验证。对25批市售的炎可宁片进行筛查,检出土大黄苷的炎可宁片有14批。结论：TLC结合HPLC法简便,快速,专属性强,能有效地检查炎可宁片是否掺入土大黄。     

Degraded and undegraded carrageenans and experimental gastric and duodenal ulceration

The prevention of histamine-induced gastric and duodenal ulceration in the guinea-pig has been examined using a series of undegraded and degraded carrageenans. Undegraded carrageenans were active at lower doses than degraded carrageenans. The high viscosity of the undegraded carrageenans in solution prevented their use in larger doses. Degradation of carrageenan without serious loss of sulphate, gives a product which allows the dose to be increased to an extent that its effect more than offsets the slight loss in activity caused by the degradation. No single feature of carrageenan structure can be related to anti-ulcer activity although degradation, and hence reduction of molecular size, generally reduces activity. Sulphate contents over 30% have little apparent effect on activity; κ-carrageenans were not consistently different in anti-ulcer activity from Λ-carrageenans. This contrasts with the antipeptic activity of carrageenans where κ-carrageenans are less active than their Λ-counter-parts. As with antipeptic activity, the degree of anti-ulcer activity is probably determined by a combination of structural features which includes molecular size and polyanionic properties.     

Affective and Anxiety Disorders and Alcohol and Drug Dependence:

Depression and anxiety frequently coexist in patients with substance use disorders. This clinically-oriented article examiens the relationship between these conditions and emphasizes data showing that substances of abuse can cause signs and symptoms of both depression and anxiety. These substance-related syndromes appear to have a different course and prognosis than uncomplicated, independent anxiety and major depressive disorders, and clinicians should consider the role of alcohol and other drugs in all patients presenting with these complaints. The authors will also outline an approach for diagnosing and managing patients with the combination of a substance use and depressive or anxiety disorder.     

Alcohol and Substance Use and Abuse in Women and Children

No abstract available for this article.     

Glucosidase and fucosidase inhibitors and Advances in nucleosides and nucleotides.

The American Chemical Society Symposium "Glucosidase and fucosidase inhibitors" took place on 1 April 1998 and was organized by Professors Zbigniew J Witczak (UConn, School of Pharmacy, CT, USA), Kuniaki Tatsuta (Waseda University, Tokyo, Japan) and Waldemar Priebe, MD (Anderson Cancer Center, University of Texas, USA). Professor Witczak provided introductory remarks including the status of existing glucosidase inhibitors, and chaired the morning session, which consisted of six lectures. The symposium was well received, and was particularly attractive for those interested in networking, as attendance was about sixty. In addition, some participants and attendees presented posters on the subject during the regular poster session organized by the Division of Carbohydrate Chemistry.