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1.
软胶囊崩解迟缓现象影响因素研究 总被引:14,自引:1,他引:13
目的:研究储存条件以及软胶囊处方对明胶胶片稳定性的影响,探讨软胶囊崩解迟缓的原因。方法:制备明胶胶片模拟软胶囊囊壳,采用溶胀动力学法测定明胶胶片平衡溶胀量(Seq),同时测定软胶囊内容物溶媒PEG400中甲醛含量。以上述结果为指标,考察不同储存条件与胶囊处方对明胶胶片交联程度的影响。结果:空白明胶胶片在40℃条件下Seq与对照组具有极显著性差异,PEG400中甲醛含量增加。含有甘油、山梨醇、二氧化钛等辅料的胶片浸泡在PEG400中后Seq与对照组具有极显著性差异,PEG400中甲醛含量量著增加。加速条件下含有抗氧剂的胶片Seq与PEG400中甲醛含量变化不大。结论:在考察的储存条件中,温度对软胶囊稳定性影响较大。含有一些常用辅料的明胶胶片易受PEG400中外源性醛类杂质的影响,Seq降低。低沮保存、纯化辅料以及添加抗氧剂有助于缓解软胶囊崩解迟缓现象的发生。 相似文献
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A microcapsule form of nitrofurantoin was prepared by a simple coacervation method with carboxymethylcellulose and aluminium sulfate. 33 factorial design was performed for three independent variables, namely, the particle size of the drug, the size of the microcapsules and the pH of the dissolution medium. The dissolution tests with the formulated microcapsules were carried out according to the United States Pharmacopeia XXII rotating basket method at pH 1.2, 5 and 7.5, which represent the pH of gastrointestinal fluids. Release data were examined kinetically and the ideal kinetic models were estimated and t
63.2 values obtained from RRSBW distribution were used in the factorial design experiment. The influence of the independent variables on the dissolution of nitrofurantoin microcapsules could be expressed as the pH of the dissolution medium > particle size of the microcapsule > particle size of nitrofurantoin. The other aim of this study was to evaluate microcapsule formulation in terms of the United States Pharmacopeia criteria with a minimum of experiments. Our findings suggest that dosage forms which comply with the pharmacopoeia criteria for dissolution can be prepared and selected by factorial design. 相似文献
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The dissolution behaviour of a direct compression compact prepared with sodium diclofenac and dibasic calcium phosphate (DCP) in different weight ratios with or without Biosoluble polymer® (acrylic-based resin) was investigated in distilled water and in a medium with changing pH. The results indicate that the amount of sodium diclofenac released from the compact was dependent on the amount of drug and DCP used in the compact, and was also controlled by the amount of Biosoluble polymer® added. A chemical reaction forming diclofenac acid might occur on the surface of the sodium diclofenac compact during exposure to the acidic medium, which was confirmed by diffuse-reflectance spectroscopy. The tablet with a 12 weight ratio of sodium diclofenac to DCP exhibited a sustained-release behaviour, similar to commercial sustained-release products (Voltaren SR-100® and Grofenac Retard®), but a lower release rate was found as compared to the commercial products. The dissolution behaviour of the study tablet and the commercial products was found to be dependent on the dissolution medium and the rotating speeds. Glass beads were added to the dissolution assembly to simulate the influence of food, and the enhanced friction between tablet and glass beads might result in a higher dissolution rate of the tablet and the commercial products. 相似文献
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对乙酰氨基酚栓的溶出度测定 总被引:2,自引:0,他引:2
目的:测定对乙酰氨基酚栓的溶出度,考察不同厂家栓剂的质量。方法:用pH7.4的磷酸盐缓冲液为溶剂,浆法测定,紫外分光光度法涵定溶出度。结果:不同厂家的栓剂溶出度差异很大。结论:应建立溶出度涵定法以有效控制药品的质量。 相似文献
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影响甲硝唑片溶出度的因素 总被引:1,自引:0,他引:1
目的:考察影响甲硝唑片溶出度的因素。方法:压片前分别按5种不同比例加羧甲基淀粉钠(CMS—Na)及硬脂酸镁,混匀,压片,测其溶出度:分别以87℃与50’C的淀粉作粘合剂制软材,压片,测其溶出度;分别以不同大小、不同硬度的颗粒压片,测其溶出度:同批颗粒分别制成直径8,9,10mm三种规格的片剂,测其溶出度。结果:CMS—Na能显著提高甲硝唑片溶出度。 相似文献