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咽炎合剂的质量控制 总被引:6,自引:0,他引:6
目的建立咽炎合剂的质量标准。方法采用薄层色谱(TLC)对咽炎合剂中金银花、玄参、甘草进行定性鉴别,以高效液相色谱法(HPLC)对主药金银花中绿原酸进行含量测定。色谱柱为WondasiC18柱,流动相为甲醇-水-冰醋酸(20:80:1),检测波长为327nm;柱温为室温,流速为1.0ml/min。结果咽炎合剂中金银花、玄参、甘草的TLC中,在与对照品色谱相应的位置上,显相同颜色的斑点;绿原酸在0.074~1.184μg间有良好的线性关系(r=0.9999)平均回收率为99.30%,RSD为1.17%。结论本方法简便、快速、准确、灵敏、重复性好,可作为咽炎合剂的质量控制。 相似文献
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高效液相色谱法测定复方金银花颗粒中绿原酸和黄芩苷含量 总被引:2,自引:0,他引:2
目的:采用高效液相色谱法测定复方金银花颗粒中绿原酸和黄芩苷的含量。方法:色谱柱为Zorbax SB—C18(250mm×4.6mm,5μm),流动相为含1%乙酸的水-甲醇梯度洗脱,检测波长为280nm;柱温为25℃。结果:绿原酸在0.0465~0、2324μg范围内线性关系良好(r=0.9998),平均加样回收率为100.6%,RSD为0.6%;黄芩苷在0.2505~1.2525μg范围内线性关系良好(r=0.9995),平均加样回收率为100.1%,RSD为1.1%。结论:该方法简便、准确、重现性好,可作为复方金银花颗粒含量控制方法。 相似文献
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目的:建立一种反相高效液相色谱法(HPLC)测定双黄连口服液中绿原酸含量的方法。方法:十八烷基硅烷健合胶柱:甲醇-水-冰醋酸(22:78:1)为流动相,流速1.0ml/min,检测波长327nm,柱温为室温。结果:线性范围0.0402-0.402μg,r=0.9993(n=6);绿原酸的加样回收率为99.78%(n=-6)(RSD=0.5%)。结论:该法快速、灵敏、准确,适合双黄连口服液中绿原酸含量的质量控制。 相似文献
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气相色谱法测定复方冰片搽剂中冰片、薄荷脑和樟脑的含量 总被引:1,自引:0,他引:1
目的:建立复方冰片搽剂中冰片、薄荷脑和樟脑的含量测定方法。方法:采用气相色谱法,色谱柱:10%PEG-30M石英毛细管色谱柱;柱温:150℃;进样口温度250℃;程序升温;FID检测器。结果:冰片、樟脑和薄荷脑平均回收率分别为:99.6%(RSD为0.8%)、99.8%(RSD为0.9%)、98.5%(RSD为1.0%)。结论:本法简便准确灵敏,可用于本品的质量控制。 相似文献
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秀山金银花、叶、茎中绿原酸的检测及其抑菌作用研究 总被引:1,自引:0,他引:1
目的测定金银花及其叶片、茎中绿原酸的含量,考察其抑菌效果。方法采用高效液相色谱法(HPLC法)和最低抑菌浓度(MIC)测定法。色谱柱为Phenomenex C18柱(250mm×4.6mm,5μm),流动相为乙腈-pH=2.04的0.4%磷酸(13:87,V/V),流速为0.5mL/min,检测波长为327nm。结果金银花及其叶片、茎中绿原酸的含量分别为6.1%,1.8%,0o金银花提取液和金银花叶片提取液对大肠杆菌的MIC分别为18.75mg/mL和150mg/mL,对金黄色葡萄球菌的MIC分别为4.6875mg/mL和37.5mg/mL。结论金银花及其叶片中绿原酸含量高,抑菌作用强。仝银花叶片具有较高的开发价值,药效可代替金银花。 相似文献
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目的 建立反相高效液相色谱法测定复方感冒止咳颗粒中绿原酸含量。方法 采用Shim-pack VP-ODS C18反相色谱柱(4.6mm×250mm,5μm),以乙腈-0.2%磷酸溶液(12:88)为流动相;流速为1.0mL·min^-1;检测波长为327nm;柱温:30℃。结果 绿原酸对照品进样量在0.101-0.805μg范围内线性关系良好(r=0.9999,n=5),平均加样回收率为99.67%,RSD为1.02%(n=6)。结论 方法简便快捷,结果准确可靠,可作于该制剂的含量测定。 相似文献
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Alberto García-Lled Javier Gmez-Pavn Juan Gonzlez del Castillo Teresa Hernndez-Sampelayo Mari Cruz Martín-Delgado Francisco Javier Martín Snchez Manuel Martínez-Sells Jos María Molero García Santiago Moreno Guilln Fernando Rodríguez-Artalejo Julin Ruiz-Galiana Rafael Cantn Pilar De Lucas Ramos Alejandra García-Botella Emilio Bouza 《Rev Esp Quimioter》2022,35(2):115
The precocity and efficacy of the vaccines developed so far against COVID-19 has been the most significant and saving advance against the pandemic. The development of vaccines has not prevented, during the whole period of the pandemic, the constant search for therapeutic medicines, both among existing drugs with different indications and in the development of new drugs. The Scientific Committee of the COVID-19 of the Illustrious College of Physicians of Madrid wanted to offer an early, simplified and critical approach to these new drugs, to new developments in immunotherapy and to what has been learned from the immune response modulators already known and which have proven effective against the virus, in order to help understand the current situation. 相似文献
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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.
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.相似文献
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Petrikovics I McGuinn WD Sylvester D Yuzapavik P Jiang J Way JL Papahadjopoulos D Hong K Yin R Cheng TC DeFrank JJ 《Drug delivery》2000,7(2):83-89
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. 相似文献
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Chang Min Kim Kun Ho Son Sung Hwan Kim Hyun Pyo Kim 《Archives of pharmacal research》1991,14(4):305-310
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. 相似文献
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Elaine S. Coimbra Rafael Carvalhaes Richard M. Grazul Patricia A. Machado Marcos V. N. De Souza Adilson D. Da Silva 《Chemical biology & drug design》2010,75(6):628-631
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. 相似文献
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《Critical reviews in toxicology》2013,43(5-6):327-369
AbstractThe uptake of metals from food and water sources by insects is thought to be additive. For a given metal, the proportions taken up from water and food will depend both on the bioavailable concentration of the metal associated with each source and the mechanism and rate by which the metal enters the insect. Attempts to correlate insect trace metal concentrations with the trophic level of insects should be made with a knowledge of the feeding relationships of the individual taxa concerned. Pathways for the uptake of essential metals, such as copper and zinc, exist at the cellular level, and other nonessential metals, such as cadmium, also appear to enter via these routes. Within cells, trace metals can be bound to proteins or stored in granules. The internal distribution of metals among body tissues is very heterogeneous, and distribution patterns tend to be both metal and taxon specific. Trace metals associated with insects can be both bound on the surface of their chitinous exoskeleton and incorporated into body tissues. The quantities of trace meals accumulated by an individual reflect the net balance between the rate of metal influx from both dissolved and particulate sources and the rate of metal efflux from the organism. The toxicity of metals has been demonstrated at all levels of biological organization: cell, tissue, individual, population, and community. Much of the literature pertaining to the toxic effects of metals on aquatic insects is based on laboratory observations and, as such, it is difficult to extrapolate the data to insects in nature. The few experimental studies in nature suggest that trace metal contaminants can affect both the distribution and the abundance of aquatic insects. Insects have a largely unexploited potential as biomonitors of metal contamination in nature. A better understanding of the physico-chemical and biological mechanisms mediating trace metal bioavailability and exchange will facilitate the development of general predictive models relating trace metal concentrations in insects to those in their environment. Such models will facilitate the use of insects as contaminant biomonitors. 相似文献