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A two-compartment model of patient-artificial kidney system consisting of a cerebrospinalfluid(CSF)and a body liquor compartments have been presented.With the model,the mechanism ofdisequilibrium syndrome occurred in a patient undergoing hemodialysis has been discussed to simulatethe CSF pressure transients.Urea,as an uretic toxin,was injected into dogs and in vivohemodialysis experiments have been performed under clinical conditions.The parameters in the sol-ution,G and K,have been determinde from experiments and are in good agreement with those re-ported under normal physiological conditions and in previous investigations. 相似文献
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以4-三氟甲基苯甲酸甲酯和甲氧基乙酸甲酯为原料,在碱性条件下进行交叉酯缩合反应,然后经水解、脱羧得到产品2-甲氧基-4′-三氟甲基苯乙酮,总收率达85%以上。实验获得了较佳工艺条件:原料配比4-三氟甲基苯甲酸甲酯/甲氧基乙酸甲酯为1/1.5(mol/mol),酯缩合的反应温度为30℃、反应时间为12h,适宜的溶剂为DMSO:水解、脱羧反应时间为15h;并采用^1HNMR及IR对产品进行了表征。 相似文献
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1 INTRODUCTIONHemodialysis with ultrafiltration,also called hemodiafiltration(HDF),is a main methodof treatment for patients with chronic renal failure.The HDF procedure providesadequate removals of both small and middle molecular weight toxic substamces fromuremic blood,which is not possible by dialysis or ultrafiltration alone.According toclinical experience[1],the HDF procedure is well accepied by the patients,and thetreatment time is reduced by using it. 相似文献
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MATHEMATICAL ANALYSIS OF DRUG RELEASE FROM PLANAR MATRIX WHEN DRUG IS LOADED UNDER THE SOLUBILITY 下载免费PDF全文
1 INTRODUCTIONThe release of a drug from a diffusional matrix has been investigated by variousresearchers for different conditions [1-4].The drug loading in the matrix may beabove or below its solubility limit.If it is beyond,the release boundary is generated bythe dissolution of drug,and the concentration in the released region may be propor-tional to the distance and kept at saturation in the unreleased region.Otherwise,the 相似文献
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探索了反应-溶析耦合结晶法提纯抗艾滋病药物利托那韦中间体[(5-噻唑基)甲基]-(4-硝基苯基)碳酸酯的工艺过程。选用甲醇作为主溶剂,碳酸钾水溶液作为反应物和析出剂,测定了物系的溶解度关系,研究了结晶温度、析出剂量和加入方式等操作条件时产品收率和纯度的影响。试验表明,在结晶终点温度为20℃,V[碳酸钾水溶液(质量分数5.0%)],V(甲醇)=3.0的条件下,采用反应-溶析耦合结晶法可从[(5-噻唑基)甲基]-(4-硝基苯基)碳酸酯盐酸盐质量分数为93.42%的原料中,结晶得到纯度为99.81%的[(5-噻唑基)甲基]-(4-硝基苯基)碳酸酯产品,收率可达93.72%。 相似文献
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血液透析(HD)、血液过滤(HF)和血液透析过滤(HDF)是目前临床上治疗慢性
肾功能衰竭最常用的 3种疗法。以往人们对 HD的传质动力学作了较多的研究l’,‘],而对
HF、HDF的研究则较少。虽然PopoviCh等门、Jaffrln等M相继提出了描述HF、HDF
传质动力学的一、二维模型,但文献囚的模型仅适用J” HD和 HDF;而巳,其解的形式 相似文献
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