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91.
目的:考察小分子靶向肽(RGD):C与力达霉素的偶联物的抗肿瘤作用。方法:MTr法观察偶联物和力达霉素在体外对人口腔鳞癌KB细胞、人乳腺癌MCF-7细胞以及人肝癌Bel7402细胞的细胞毒性。克隆形成法观察其对人肝癌Bel7402细胞克隆形成的抑制作用。采用C57BIM6小鼠Lewis肺癌移植瘤模型观察其实验治疗作用。结果:MrlT法结果表明,偶联物对人口腔鳞癌KB细胞、人肝癌Bel7402细胞和人乳腺癌MCF-7细胞的细胞毒性比力达霉素分别下降13倍、46倍和186倍。克隆形成法表明.偶联物对人肝癌Bel7402细胞的克隆形成抑制率比力达霉素下降10倍。0.2,0.1,O.05mg·kg-1偶联物对C57BL/6小鼠Lewis癌皮下原发瘤的生长抑制率分别为35.8%,25.6%和10.3%;0.05mg·kg-1素对肿瘤生长的抑制率为32.4%。0.2,0.1,0.05mg·kg-1偶联物对小鼠Lewis癌肺转移的抑制率分别为69.6%,50.5%和34.2%,0.05mg·kg-1达霉素、0.05mg·kg-1力达霉素+1mg·kg-1(RGD):C肽的抑制率分别为53.3%和54.9%。结论:按等细胞毒性剂量来计算,偶联物体内抗肿瘤活性和抗肿瘤转移活性比力达霉素强,提示小分子靶向肽RGD与力达霉素偶联后发挥了一定的导向作用。 相似文献
92.
翡翠贻贝多糖对荷瘤小鼠的抗肿瘤和免疫功能调节作用 总被引:1,自引:0,他引:1
目的观察翡翠贻贝多糖(PVPS)对荷瘤小鼠肿瘤生长及免疫功能的影响。方法建立小鼠移植性S180实体瘤模型,观察PVPS对荷瘤小鼠的抑瘤率及对T淋巴细胞增殖能力、白介素2(IL-2)等指标的影响。结果PVPS可明显抑制荷瘤小鼠S180实体瘤的生长(P〈0.05orP〈0.01),提高T淋巴细胞增殖能力和IL-2的产生(P〈0.01)。结论PVPS可显著抑制荷瘤小鼠肿瘤的生长,并能增强荷瘤小鼠的免疫功能。 相似文献
93.
熊果酸衍生物可抑制多种肿瘤细胞的生长,并因其细胞低毒性而日益成为抗肿瘤药物领域的研究热点.本文对通过中国专利数据库进行检索获得的熊果酸衍生物在中国的相关专利申请进行了分析,总结了目前国内专利申请中熊果酸衍生物主要结构修饰位置及其活性,并结合目前国内雄果酸衍生物相关专利申请的现状给出了今后专利申请的建议. 相似文献
94.
目的研究真菌植物提取物AMH-D的体内抗肿瘤作用,与环磷酰胺是否具有联合作用以及联合作用的形式和强度,为抗癌药物的开发提供科研基础.方法昆明种小鼠右腋皮下接种S-180肿瘤细胞,随机分组后,第2天开始腹腔注射给药,隔天给药1次,第11天处死小鼠,剥离并称重肿瘤,以肿瘤重量作为分析评价指标.结果提取物AMH-D能显著抑制S-180的生长,在剂量为150 mg/kg时抑瘤率达50.45%,其肿瘤抑制作用呈现剂量-效应关系.AMH-D对小鼠体重增长没有明显的影响.AMH-D与环磷酰胺具有体内协同抗肿瘤作用.结论真菌植物提取物AMH-D具有体内抑制S-180肿瘤作用,并与临床抗癌药物环磷酰胺具有体内联合抗癌作用. 相似文献
95.
褪黑素是一种由脊椎动物脑中松果腺体分泌的吲哚类激素,它可能通过对细胞周期的调节、通过调钙蛋白M与雌激素信号通路发生联系而发挥抑制人类肿瘤生长、扩散的作用.褪黑素已在乳腺癌、前列腺癌的发病及治疗方面取得一定的成果,但对肝癌的研究并不深入,可能与黑色素对肝细胞凋亡诱导、影响肝癌细胞周期以及调节免疫等作用有关,该文就褪黑素抗肝癌作用机制的研究新进展予以综述. 相似文献
96.
97.
从抗肿瘤药物的不良反应和防治措施、掌握药品说明书内容、监护整个用药过程及对患者的用药教育四个方面探讨临床药师对抗肿瘤药物的药学监护,促进抗肿瘤药物的合理使用.临床药师应关注和掌握抗肿瘤药物常见的不良反应及防治措施,掌握抗肿瘤药品说明书的内容,协助医生选择合理的用药方法,监护整个用药过程,做好药品的正确使用、患者的用药教育和健康教育,提高患者的依从性.临床药师只有通过临床实践,真正树立以病人为中心和团队合作共同为病人服务的理念,才能在实践中发现潜在的或实际存在的临床用药问题并正确预防或解决. 相似文献
98.
Yu-Xia Wang Xiang-Xiang Gu Di Geng Hua-Ying Sun Chun-Mei Wang Gui-Xiang Jiang Xin-Nan Hou Chang-Hua Ma 《Journal of ethnopharmacology》2014
Ethnopharmacological relevance
Gecko, a kind of reptile, has been widely used as a traditional Chinese medicine to treat various diseases including cancer in China for thousands of years. The aim of this study was to investigate the anti-tumor effect of AG (aqueous extracts of fresh gecko) on human hepatocellular carcinoma cell Bel-7402 in vitro and mouse H22 hepatocellular in vivo. Further to underlie the molecular mechanism of AG inducing the differentiation of Bel-7402 cells.Materials and methods
AG was obtained by water extracting method and qualitatively analyzed through High Performance Liquid Chromatography. The total protein concentration of AG was measured by BCA (bicinchoninic acid disodium) assay. The anti-tumor activities in vivo were analyzed through H22 (mouse hepatocellular carcinoma cell line H22) tumor xenografts mice. The cytotoxic activity of AG on Bel-7402 cells was evaluated by MTT assays. AFP (alpha fetoprotein) was detected by radioimmunoassay. ALB (albumin), ALP (alkaline phosphatase) and γ-GT (γ-glutamyl transpeptidase) were detected by biochemical methods with commercial kits. While morphological changes were observed through an inverted microscope. Moreover, the expression level of the proteins involved in MAPK (mitogen-activated protein kinase) signal pathway which was closely related to cellular differentiation was assessed by Western blot.Results
AG showed obviously anti-tumor activity in vivo and anti-proliferative activity on Bel-7402 cells in vitro both dose-dependently. The number of clones of Bel-7402 cells treated with AG reduced and the cells were displaying differentiation state such as relatively bigger size and dispersed growth. The biochemical function markers of the cells were significantly changed after being treated with AG. The data showed that AFP secretion of the cells decreased 42.5%, ALB secretion increased 58.9%, the activity of ALP and γ-GT markedly decreased 67.0% and 48.5% separately when the concentration of AG was 10 μl/ml, and those effects were all in a dose-dependent manner. The major original and phosphorylated signal proteins (ERK1/2 (extracellular sigal-regualted kinase 1/2), P38 (p38 MAPK) and JNK1/2 (c-Jun N-terminal kinase 1/2)) involved in MAPK signal pathway were measured and the results showed that AG activated the ERK1/2 of Bel-7402 cells.Conclusions
AG has anti-tumor activity in vivo and inhibits Bel-7402 cell proliferation in vitro through inducing cell differentiation, and the mechanism involves the activation of ERK1/2. 相似文献99.
Nanoparticle and liposome formulations containing doxycycline or doxycycline and sodium taurocholate (NaTC) were developed in this study. The anticancer effects of doxycycline and penetration properties from those formulations through Caco-2 cell monolayers were investigated. Matrix metalloproteinases (MMPs) have been reported to play a role in the negative prognosis of many malignant tumors including glioblastoma multiforme (GBM). This study is presented to demonstrate that these developed nanoparticle and liposome formulations of doxycycline are capable of inhibiting MMP-2 release from cultured Caco-2 cells. In this study, Caco-2 cells were used as model cell cultures. A MTT test was performed to determine the effect of doxycycline on the viability of Caco-2 cells. Doxycycline nanoparticles were prepared using emulsion polymerization and doxycycline liposomes were prepared using the dry film hydration method. Transport studies of doxycycline through Caco-2 cells were investigated. MMP-2 was found to be inhibited more with doxycycline if NaTC is present in the formulation. NaTC was also found to be useful to increase penetration due to the inhibition of efflux by interacting with p-glycoproteins, in addition to the penetration enhancing effect as a result of opening tight junctions. These developed formulations were proposed to use for the treatment of tumors and GBM. 相似文献
100.
目的探讨人肺腺癌细胞总RNA转染的树突状细胞(DCs)诱导抗原特异性的细胞毒T细胞(CTLs)对移植瘤裸鼠的抗肿瘤作用。方法 1)从外周血单个核细胞(PBMCs)中诱导DCs,提取人肺癌细胞A549总RNA,用于电转染DCs,转染后的DCs与自体T细胞混合培养,诱导抗原特异性的CTLs;2)实验分为转染RNA的DCs组、转染PBS的DCs组和未转染DCs组,流式细胞术(FCM)鉴定T细胞表型,3H-TdR掺入检测T细胞增殖能力;3)建立肺癌细胞株A549荷瘤裸鼠模型,过继回输CTLs,比较肿瘤体积,计算抑瘤率,免疫组化法检测移植瘤组织中Bax、Bcl-2、COX-2和VEGF的表达,并用全自动图像分析系统分析其平均光密度值(MOD)。结果 1)转染RNA的DCs和自体T细胞共育诱导的CTLs的CD8+T细胞大幅度上调,表达率(79.29±2.18)%明显高于转染PBS的DCs组CD8+T细胞(26.10±1.76)%和未转染DCs组CD8+T细胞(25.58±2.73)%(P0.05);2)转染RNA的DCs显著刺激了自体T细胞增殖,3H-TdR渗入所得的cpm值:阳性对照组为17 105±130,转染RNA的DCs组为7 759±493,转染PBS的DCs组为2 611±161,未转染DCs组为2 248±332(P0.05);3)成功建立肺癌裸鼠移植瘤模型,实验结束时,转染RNA组裸鼠荷瘤体积(540±99)mm3明显小于转染PBS组(1 572±147)mm3和未转染组(2 043±395)mm3(P0.05);4)转染RNA组和转染PBS组的抑瘤率分别为68.53%和8.62%;5)转染RNA的DCs诱导的CTLs能显著上调Bax的表达(转染RNA组MOD值为335±105),显著下调Bcl-2、COX-2和VEGF的表达(转染RNA组MOD值分别为146±47、122±33和128±58)。结论人肺腺癌细胞总RNA转染DCs诱导的抗原特异性CTLs对肺腺癌裸鼠移植瘤的生长产生抑制作用。 相似文献