高效液相色谱法同时测定橘红颗粒中3种黄酮类成分含量

目的 建立同时测定橘红颗粒中芸香柚皮苷、柚皮苷和橙皮苷含量的高效液相色谱法。方法 色谱柱为Agilent 5TC-C₁₈(2)柱(250 mm×4.6 mm,5μm),流动相为乙腈-0.1%醋酸水溶液(梯度洗脱),流速为1.0 mL/min,检测波长为280 nm,柱温为30℃,进样量为10μL。结果 芸香柚皮苷、柚皮苷和橙皮苷进样量分别在0.034 8～0.348μg(r=0.999 5)、1.047～10.47μg(r=0.999 4)、0.185 9～1.859μg(r=0.999 7)范围内与峰面积线性关系良好;精密度、稳定性、重复性试验结果的RSD均不大于2.0%;平均加样回收率分别为98.24%,96.29%,97.83%,RSD分别为1.16%,1.08%,2.34%(n=6)。结论 所建立的方法操作简便、重复性好、结果准确,可用于同时测定橘红颗粒中上述3种黄酮类成分的含量。     

RP—HPLC法测定金甲王颗粒中柚皮苷的含量

目的:建立 HPLC 法测定金甲王颗粒中柚皮苷含量。方法:采用 Dikma Diamonsil~(TM)C_(18)色谱柱(4.6mm×250mm,5μm),以0.05moL·L~(-1)磷酸二氢钾-乙腈-浓氨试液(80:20:0.2)为流动相,流速1mL·min~(-1),检测波长为283nm。结果:柚皮苷进样量在0.28～1.41μg范围内与峰面积具有良好的线性关系(r=0.9999);平均回收率为99.4%,RSD=1.4%(n=6)。结论:本方法操作简便,结果准确,可用于该品种的质量控制。     

HPLC法测定橘红枇杷颗粒中柚皮苷的含量

目的:建立测定橘红枇杷颗粒中柚皮苷含量的方法。方法:采用高效液相色谱法。色谱柱为Nucltosil C18(250mm×4.6mm,10μm),流动相为甲醇-冰醋酸-水(35∶4∶60),检测波长为283nm,流速为1.0mL·min-1。结果:柚皮苷进样量在0.6～1.4μg范围内与峰面积积分值呈良好线性关系(r=0.9998);平均回收率为97.36%,RSD=1.37%(n=6)。结论:本方法简便、准确度高、重复性好,可用于测定橘红枇杷颗粒中柚皮苷的含量。     

HPLC法测定小儿消积止咳颗粒中柚皮苷的含量

目的建立小儿消积止咳颗粒处方药材枳实中药效成分柚皮苷的含量测定方法。方法采用高效液相色谱法,色谱柱为Hypersil C18(4.6 mm×250 mm,5μm),以甲醇-水(35∶65),流速1 mL·min-1;检测波长283nm,柱温25℃。结果柚皮苷在0.254 2～1.271 0μg范围内线性关系良好,相关系数为1.000 0,平均回收率为99.50%(RSD=1.48%,n=6)。结论该方法简便、准确、重现性好,可用于小儿消积止咳颗粒中柚皮苷的含量控制。     

高效液相色谱法测定骨刺宁胶囊中柚皮苷的含量

目的建立骨刺宁胶囊中柚皮苷的含量测定方法。方法采用HPLC法。色谱柱为DiamonsilTMC18柱(250mm×4.6mm,5μm),流动相为甲醇-醋酸-水(30∶10∶60),流速1.0mL/min。柱温:25℃,检测波长283nm。结果柚皮苷进样量在0.24016~0.84056μg范围内与峰面积呈良好线性关系(r=0.9999),平均加样回收率为99.4%(RSD=1.61%,n=6)。结论该方法简便准确,重现性好,可用于骨刺宁胶囊中柚皮苷含量的质量控制。     

高效液相色谱法测定润降利膈颗粒中柚皮苷含量

目的建立测定润降利膈颗粒中柚皮苷含量的高效液相色谱法。方法色谱柱为Kromasil C18柱(200 mm×4.6 mm,5μm),流动相为乙腈-0.1%磷酸溶液(20∶80),流速1.0 mL/min,检测波长283 nm。结果柚皮苷质量浓度在13.23～264.50μg/mL范围内与峰面积积分值线性关系良好,r=0.999 5(n=6),平均回收率为100.61%,RSD=1.94%(n=6)。结论所用方法精密度高、分离度好,可作为润降利膈颗粒的质量控制方法。     

HPLC测定四磨汤口服液中柚皮苷的含量

目的 建立四磨汤口服液中柚皮苷含量测定方法。方法 采用高效液相色谱法,SymmetryC18柱(3.9 mm×150 mm,5μm),流动相为甲醇-1％冰醋酸(38:62,v/v),检测波长283 nm。结果 柚皮苷在0.0153-0.153g·L-1内呈良好的线性关系(r=0.9996),平均加样回收率为101.1％(n=6),RSD=2.7％。结论 本法简单、准确、可靠,可作为该制剂的质量控制方法。     

高效液相色谱法测定平消片中柚皮苷的含量

目的 建立高效液相色谱法(HPLC)对平消片中柚皮苷的含量进行测定.方法 采用Shim-pack ODS柱(250mm×5.0mm,5μm),流动相为甲醇-水-冰醋酸(70: 30: 1V/V),流速为1.0ml/min;紫外检测波长:284nm,柱温35℃.结果 柚皮苷在0.175～1.225μg范围内线性关系良好(r=0.9998,n=7),最低检测质量浓度为0.175μg,平消片中柚皮苷含量为14.718～15.524mg/g.结论 该方法具有操作简便、方法可靠、结果准确、稳定性好的特点,可用于平消片中柚皮苷的含量测定及质量控制.     

高效液相色谱法测定四磨汤糖浆中柚皮苷含量

目的建立测定四磨汤糖浆中柚皮苷含量的高效液相色谱法。方法采用Agilent ZORBAX Eclipse XDB C18(5 μm,4.6 mm×250 mm)色谱柱；检测波长:283 nm；流动相：甲醇 0.1%醋酸(38：62)；流速：1.0 mL·min 1；柱温：25 ℃。结果柚皮苷线性范围为15.25～152.50 μg·mL 1(r=0．999 8)，平均回收率为99.3%，RSD为1.8%。结论该方法简便快捷、精密度高、准确性好，可以作为四磨汤糖浆的含量测定方法。     

高效液相色谱法同时测定痔特佳片中柚皮苷和黄芩苷的含量

目的建立HPLC法同时测定痔特佳片中柚皮苷和黄芩苷的含量。方法采用Hypersil ODS2(4.6mm×250mm,5μm)色谱柱;流动相:乙腈-水(20∶80)(用磷酸调节pH值至3.0);流速:1.0mL.min-1;检测波长:283nm;柱温:35℃。结果柚皮苷进样量在0.0540μg~0.540μg(r=0.9998),黄芩苷进样量在0.0626μg~0.626μg(r=0.9999),与峰面积线性关系良好;柚皮苷平均回收率为99.28%,RSD为1.45%(n=9);黄芩苷平均回收率为100.33%,RSD为1.27%(n=9)。结论该方法简便,快速,结果可靠,可用于痔特佳片的质量控制。     

Pharmacological treatment of COVID-19: an opinion paper

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.     

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.     

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.     

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.