高效液相色谱法测定酚麻美敏片的含量

目的 :建立测定酚麻美敏片含量的方法。方法 :高效液相色谱法。固定相为ODS -C18柱 ,4 .6mm× 2 50mm ,5μm ;流动相为甲醇 -0 .0 5mol/L磷酸二氢钾 -三乙胺 ( 2 0∶80∶0 .0 2 ,用磷酸调至pH5.5) ;检测波长为 2 1 5nm 结果 :4种成分的方法回收率均在 98%～ 1 0 1 % ,n =3。结论 :该方法简便准确 ,结果满意     

反相高效液相色谱法测定风湿骨痛颗粒中甘草酸的含量

目的　研究风湿骨痛颗粒中甘草酸的定量分析方法。方法　采用高效液相色谱法。色谱柱。shim packclc ODS(15 0mm× 4 6mm ) ;流动相 :甲醇 -水 -冰醋酸 -三乙胺(6 0∶38∶1∶0 3) ;检测波长 :2 5 0nm ;柱温 :30℃ ;结果　甘草酸含量测定的线性范围为 16 4 2～ 82 10 μg(r =0 9999,n =5 ) ,平均加样回收率为 98 0 2 % ,RSD为 1 4 2 %。结论　该方法简便、快速准确 ,可作为该制剂的质量控制方法     

HPLC测定人血清中胺碘酮浓度

采用高效液相色谱法测定人血清中胺碘酮的浓度 ,色谱柱为ShimpackC1 8柱 (1 5 0mm× 6mm ,5 μm)。流动相为甲醇 -水 -二乙胺 (75 0∶2 5 0∶5 ) (醋酸调pH值 5 5 )。流速为 1ml·min- 1 ,检测波长为 2 42nm。测得胺碘酮的平均回收率为 1 0 2 3 % ,RSD为 6 7% ,方法快速 ,简便     

高效液相色谱法测定卡托普利片含量

目的　建立卡托普利片含量的高效液相测定法。 方法 　利用高效液相色谱法测定 ,选用 Kromasil C1 8柱 ,( 5μm,2 0 0 mm× 4.6mm) ;流动相 :0 .0 1%磷酸二氢钠溶液 -乙腈 -甲醇 ( 66∶ 17∶ 17)流速 1.0 m L· min- 1 ;检测波长 :2 15 nm;柱温 5 0℃。没食子酸丙脂作内标物质。结果 　线性范围为 2 5μg· m L- 1～ 75μg· m L - 1 ;方法回收率为 10 0 .4%,RSD=0 .83 %( n=9)。 结论 　该方法简便 ,灵敏 ,准确     

HPLC法测定西红花康复液中丹皮酚的含量

目的 :建立西红花康复液中丹皮酚的高效液相色谱分析方法。方法 :以KomasilODS 1(4 .6mm× 2 0 0mm ,5 μm)为色谱柱 ,流动相为甲醇∶水 (5 0∶5 0 ) ,流速为 1ml·min-1,柱温 4 0℃ ,检测波长 2 74nm。结果 :线性范围为 0 .0 6 3～ 0 .378μg(r =0 .9998) ,平均加样回收率为 97.2 4 % ,RSD为 2 6 .3% (n =9)。结论 :本方法快速、简便 ,适用于本制剂的质量控制。     

高效液相色谱法测定复方荔枝草颗粒剂中高车前苷含量

目的 :建立测定复方荔枝草颗粒剂中高车前苷含量的高效液相色谱法。方法 :以KF -C18(2 5 0mm× 4 6mm ,10 μm)为分析柱 ,流动相为甲醇 -水 -pH 3 5的 1 0mol·L-1磷酸盐缓冲液 (4 0∶5 5∶5 ) ;柱温为 45℃ ;检测波长为 335nm ;流速为 1 0mL·min-1,采用面积外标法。结果 :线性范围 3 12× 10 -3 ～ 0 2 0 μg ,平均回收率为 96 96 %～ 10 1 5 % ,RSD <0 6 9% (n =3)。结论 :本法简便、灵敏、重现性好 ,可用于测定该颗粒剂高车前苷的含量和质量标准的控制。     

高效液相色谱法测定接骨增效胶囊中柚皮苷含量

目的 :建立接骨增效胶囊中柚皮苷含量测定方法。方法 :采用高效液相色谱法 ,色谱柱为HyporsilODS柱 (4.6mm×15 0mm ,5 μm) ;流动相为甲醇 水 冰醋酸 (35∶6 5∶0 .3,pH3) ;紫外检测波长 2 83nm ;流速为 1.2ml·min-1。结果 :线性范围是 2～35 μg·ml-1;回收率为 97.0 1% ,RSD =3.11% (n =5 )。结论 :方法简便、快速、准确 ,可作为该制剂的质控方法。     

高效液相色谱法测定金骨颗粒剂中仙茅苷的含量

目的 :高效液相色谱法测定金骨颗粒剂中仙茅苷的含量。方法 :本品以甲醇提取 ,提取物加水溶解后用醋酸乙酯萃取 ,萃取液进行高效液相色谱法分析。色谱柱AlltimaC1 8(5 μm ,4 6mm× 2 5 0mm) ,流动相为甲醇 -异丙醇 -水 (2 0∶5∶75 ) ,流速 :0 8mL·min- 1 ;柱温 :30℃ ;检测波长 :2 83nm。结果 :加样平均回收率为 98 6 8% ,RSD为 2 1% (n =5 )。结论 :实验结果表明 ,该法灵敏度高、专属性好、操作简便、重现性好。     

HPLC法测定煤盏花素片含量

目的 　测定灯盏花素片的含量。 方法 　采用高效液相色谱法。色谱柱为 C1 8柱。 (10μm,4.6mm× 2 5 0 mm) ;流动相为甲醇 :水 (80∶ 2 0 ) ;流速 0 .9ml·min- 1 ,检测波长 3 3 5 nm;柱温 :室温。结果 　灯盏花素片在 2 0 μg～ 80 μg·ml- 1范围内 ,线性关系良好 ,平均回收率为 10 0 .2 % ,RSD为 1.5 3 %。 结论 　该法可用于灯盏花素片中灯盏花乙素的含量测定     

高效液相色谱法测定丙谷胺片的含量

目的 　建立高效液相色谱法 (外标法 )测定丙谷胺片的含量。 方法 　采用 Agilient Hypersil ODS柱 (4 .0 mm× 2 5 0 mm,5μm) ,检测波长2 2 5 nm,流动相为甲醇 -水 (60∶ 40 ) ,流速为 1.0 ml·min- 1 ,外标法。结果 　测得线性范围 :12 .3 6～ 12 3 .6μg·m L- 1 ,回收率 99.3 2± 0 .89% (n=6) ,RSD为 1.44 %。 结论 　该方法操作简便、结果准确、重现性好。     

Synthesis,Cytotoxicity and Antileishmanial Activity of Some N-(2-(indol-3-yl)ethyl)-7-chloroquinolin-4-amines

We report herein the condensation of 4,7-dichloroquinoline (1) with tryptamine (2) and D-tryptophan methyl ester (3) . Hydrolysis of the methyl ester adduct (5) yielded the free acid (6) . The compounds were evaluated in vitro for activity against four different species of Leishmania promastigote forms and for cytotoxic activity against Kb and Vero cells. Compound (5) showed good activity against the Leishmania species tested, while all three compounds displayed moderate activity in both Kb and Vero cells.     

Efficacy of gut lavage,hemodialysis, and hemoperfusion in the therapy of paraquat or diquat intoxication

Clinical and in vitro investigations were carried out to test the efficacy of gut lavage, hemodialysis, and hemoperfusion in the treatment of poisoning with paraquat or diquat. In a patient suffering from diquat intoxication 130 times more diquat was removed by gut lavage 30 h after ingestion than was removed by complete aspiration of the gastric contents.Determination of in vitro clearances for paraquat and diquat by hemodialysis showed that, at serum concentrations of 1–2 ppm, such as are frequently encountered in poisoning in man, toxicologically relevant quantities of herbicide cannot be removed from the body. At a concentration of 20 ppm, on the other hand, hemodialysis proved to be effective, the clearance being 70 ml/min at a blood flow rate of 100 ml/min. The efficacy of hemoperfusion with coated activated charcoal was on the whole better. Especially at concentrations around 1–2 ppm, the clearance values for hemoperfusion were some 5–7 times higher than those for hemodialysis.In a patient suffering from paraquat poisoning, both hemodialysis as well as hemoperfusion were carried out. The in vitro results could be confirmed: At serum concentrations of paraquat less than 1 ppm no clearance could be obtained by hemodialysis while by hemoperfusion with activated charcoal quite high clearance values were measured and the serum level dropped down to zero.

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Zusammenfassung Klinische Untersuchungen und Laboratoriumsversuche wurden durchgeführt, um die Wirksamkeit von Darmspülung, Hämodialyse und Hämoperfusion bei Paraquat- und Deiquat-Vergiftungen zu prüfen.Bei einem Patienten wurde 30 Std nach Deiquat-Aufnahme durch Darmspülung 130mal mehr Deiquat entfernt als durch vollständige Aspiration des Mageninhaltes. In vitro-Versuche ergaben, daß bei Blutserumkonzentrationen von 1–2 ppm, die bei Vergiftungen oft gemessen werden, durch Hämodialyse keine toxikologisch relevanten Paraquat- oder Deiquat-Mengen entfernt werden können. Dagegen erwies sich die Hämodialyse bei 20 ppm und einer Blutumlaufgeschwindigkeit von 100 ml/min mit einer Clearance von 70 ml/min als wirksam. Die Hämoperfusion mit beschicheter Aktivkohle war in diesen Versuchen aber eindeutig überlegen, denn insbesondere bei Konzentrationen um 1–2 ppm waren die Clearance-Werte 5–7mal höher als bei der Hämodialyse.Die in vitro-Ergebnisse wurden bei einem Patienten mit einer Paraquat-Vergiftung bestätigt: Bei Konzentrationen unter 1 ppm war die Hämodialyse wirkungslos, während durch Hämoperfusion relativ hohe Clearance-Werte erreicht wurden, so daß der Serumspiegel rasch unter die Nachweisgrenze abfiel.

     

In vitro studies on sterically stabilized liposomes (SL) as enzyme carriers in organophosphorus (OP) antagonism

This study describes a new approach for organophosphorous (OP) antidotal treatment by encapsulating an OP hydrolyzing enzyme, OPA anhydrolase (OPAA), within sterically stabilized liposomes. The recombinant OPAA enzyme was derived from Alteromonas strain JD6. It has broad substrate specificity to a wide range of OP compounds: DFP and the nerve agents, soman and sarin. Liposomes encapsulating OPAA (SL)* were made by mechanical dispersion method. Hydrolysis of DFP by (SL)* was measured by following an increase of fluoride ion concentration using a fluoride ion selective electrode. OPAA entrapped in the carrier liposomes rapidly hydrolyze DFP, with the rate of DFP hydrolysis directly proportional to the amount of (SL)* added to the solution. Liposomal carriers containing no enzyme did not hydrolyze DFP. The reaction was linear and the rate of hydrolysis was first order in the substrate. This enzyme carrier system serves as a biodegradable protective environment for the recombinant OP-metabolizing enzyme, OPAA, resulting in prolongation of enzymatic concentration in the body. These studies suggest that the protection of OP intoxication can be strikingly enhanced by adding OPAA encapsulated within (SL)* to pralidoxime and atropine.     

Lung disease and PKCs

The lung offers a rich opportunity for development of therapeutic strategies focused on isozymes of protein kinase C (PKCs). PKCs are important in many cellular responses in the lung, and existing therapies for pulmonary disorders are inadequate. The lung poses unique challenges as it interfaces with air and blood, contains a pulmonary and systemic circulation, and consists of many cell types. Key structures are bronchial and pulmonary vessels, branching airways, and distal air sacs defined by alveolar walls containing capillaries and interstitial space. The cellular composition of each vessel, airway, and alveolar wall is heterogeneous. Injurious environmental stimuli signal through PKCs and cause a variety of disorders. Edema formation and pulmonary hypertension (PHTN) result from derangements in endothelial, smooth muscle (SM), and/or adventitial fibroblast cell phenotype. Asthma, chronic obstructive pulmonary disease (COPD), and lung cancer are characterized by distinctive pathological changes in airway epithelial, SM, and mucous-generating cells. Acute and chronic pneumonitis and fibrosis occur in the alveolar space and interstitium with type 2 pneumocytes and interstitial fibroblasts/myofibroblasts playing a prominent role. At each site, inflammatory, immune, and vascular progenitor cells contribute to the injury and repair process. Many strategies have been used to investigate PKCs in lung injury. Isolated organ preparations and whole animal studies are powerful approaches especially when genetically engineered mice are used. More analysis of PKC isozymes in normal and diseased human lung tissue and cells is needed to complement this work. Since opposing or counter-regulatory effects of selected PKCs in the same cell or tissue have been found, it may be desirable to target more than one PKC isozyme and potentially in different directions. Because multiple signaling pathways contribute to the key cellular responses important in lung biology, therapeutic strategies targeting PKCs may be more effective if combined with inhibitors of other pathways for additive or synergistic effect. Mechanisms that regulate PKC activity, including phosphorylation and interaction with isozyme-specific binding proteins, are also potential therapeutic targets. Key isotypes of PKC involved in lung pathophysiology are summarized and current and evolving therapeutic approaches to target them are identified.     

Steroidal sapogenin contents in some domestic plants

In order to find out the values of the steroid resources for the future use. the compositions and contents of steroidal sapogenins from 13 domestic plants have been investigated. As a result,Dioscorea nipponica, D. quinqueloba andSmilax china were found to have large amount of diosgenin. And pennogenin inTrillium kamtschaticum andParis verticillata, yuccagenin inAllium fistulosum, hecogenin inAgave americana and neochlorogenin inSolanum nigum were appeared to be major steroidal sapogenins.