全文获取类型
收费全文 | 215327篇 |
免费 | 20897篇 |
国内免费 | 14188篇 |
专业分类
耳鼻咽喉 | 2246篇 |
儿科学 | 2849篇 |
妇产科学 | 1817篇 |
基础医学 | 21032篇 |
口腔科学 | 3659篇 |
临床医学 | 26298篇 |
内科学 | 28595篇 |
皮肤病学 | 2583篇 |
神经病学 | 9379篇 |
特种医学 | 8601篇 |
外国民族医学 | 83篇 |
外科学 | 22301篇 |
综合类 | 43810篇 |
现状与发展 | 59篇 |
一般理论 | 17篇 |
预防医学 | 17298篇 |
眼科学 | 4927篇 |
药学 | 22922篇 |
239篇 | |
中国医学 | 15196篇 |
肿瘤学 | 16501篇 |
出版年
2024年 | 767篇 |
2023年 | 2991篇 |
2022年 | 7749篇 |
2021年 | 10137篇 |
2020年 | 7987篇 |
2019年 | 6231篇 |
2018年 | 6762篇 |
2017年 | 6732篇 |
2016年 | 6575篇 |
2015年 | 10169篇 |
2014年 | 12355篇 |
2013年 | 12775篇 |
2012年 | 18410篇 |
2011年 | 19762篇 |
2010年 | 14782篇 |
2009年 | 12140篇 |
2008年 | 13833篇 |
2007年 | 13346篇 |
2006年 | 12413篇 |
2005年 | 10893篇 |
2004年 | 7748篇 |
2003年 | 7463篇 |
2002年 | 6207篇 |
2001年 | 4656篇 |
2000年 | 3603篇 |
1999年 | 2945篇 |
1998年 | 1719篇 |
1997年 | 1646篇 |
1996年 | 1223篇 |
1995年 | 1198篇 |
1994年 | 894篇 |
1993年 | 559篇 |
1992年 | 671篇 |
1991年 | 514篇 |
1990年 | 454篇 |
1989年 | 392篇 |
1988年 | 309篇 |
1987年 | 314篇 |
1986年 | 261篇 |
1985年 | 170篇 |
1984年 | 94篇 |
1983年 | 65篇 |
1982年 | 58篇 |
1981年 | 54篇 |
1980年 | 35篇 |
1979年 | 57篇 |
1977年 | 27篇 |
1976年 | 23篇 |
1974年 | 30篇 |
1973年 | 41篇 |
排序方式: 共有10000条查询结果,搜索用时 19 毫秒
41.
舌癌患者手术及放化疗后会出现构音障碍、吞咽困难、口腔黏膜炎、口干、营养不良等并发症,使患者生存质量下降,甚至导致肿瘤的复发转移,影响生存期,单一方法往往顾此失彼。依托于中国中医科学院西苑医院肿瘤康复基地,杨宇飞教授在国内外调研考察基础上,结合中国国情,构建了一种“门诊多学科肿瘤康复模式”,在舌癌康复方面,以患者为中心,以中医肿瘤内科为主导,多学科共同参与,结合康复科、口腔科、营养科、药剂科等各科优势,形成全程个体化规范序贯康复方案,对患者及早进行康复,在放疗前进行预防性干预尤其重要,使患者能够快速缓解手术和放疗的不良反应,患者获益明显。现取两个典型案例总结其舌癌多学科康复的经验,以期为舌癌的康复提供借鉴。 相似文献
42.
43.
44.
45.
目的 通过阿霉素(Dox)复制大鼠慢性心力衰竭(CHF)模型,观察Liguzinediol对CHF大鼠心功能的影响。方法 通过血流动力学观察Liguzinediol对Dox(腹腔注射,2 mg/kg)诱导的CHF大鼠左心室内压最大上升/下降速率(±dp/dtmax)、左心室内压(LVSP)、动脉收缩压(ASP)、动脉舒张压(ADP)和心率(HR)的变化;观察Liguzinediol对血清一氧化氮(NO)、一氧化氮合成酶(NOS)、超氧化物歧化酶(SOD)、肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)以及血浆中丙二醛(MDA)的影响。结果 Liguzinediol能增加LVSP、+dp/dtmax、ASP、ADP、AP、HR,降低-dp/dtmax(P<0.05~0.01);降低NO、iNOS以及MDA的浓度,同时增强了SOD的活性(P<0.05~0.01);抑制IL-6和TNF-α的生成(P<0.05~0.01)。结论 Liguzinediol可明显改善Dox诱导的CHF大鼠血流动力学指标,减少模型大鼠炎症因子的释放以及抑制氧自由基的生成。 相似文献
46.
Wei Zhang Zheng Li Feng-Qing Xu Ya-Shuo Ren Shuang-Wang Xu Tong-Sheng Wang 《Journal of Asian natural products research》2019,21(5):426-434
Two new 11-methoxyl substituted triterpenoids, named as mimengosides J (1) and K (2), along with seven known compounds, were isolated from the fruits of Buddleja lindleyana. Their structures were elucidated on the basis of spectroscopic analysis. In addition, the new ones were evaluated for protective effects against damage of SH-SY5Y cells induced by 1-methyl-4-phenylpyridinium ion (MPP+) and the results indicated that those may be one of the candidate compositions of Buddleja lindleyana for the treatment of neurodegenerative disease.
47.
Matrine,oxymatrine, and compound Kushen injection from the roots of Sophora flavescens: an overview of their anticancer activities
下载免费PDF全文
![点击此处可从《中国药学》网站下载免费的PDF全文](/ch/ext_images/free.gif)
In the present review, we updated current information on the chemistry, contents, and anticancer properties of matrine (MT), oxymatrine (OMT), and compound Kushen injection (CKI). The anticancer properties were focused on lung, breast, and liver cancer cells because they are most susceptible. Sources of information were from Google, Google Scholar, PubMed, PubMed Central, Science Direct, PubChem, J-Stage, Directory of Open Access Journals (DOAJ), and China National Knowledge Infrastructure (CNKI). Reference was also made on botanical websites, such as Flora of China and World Flora Online. MT and OMT are dominant quinolizidine alkaloids from the roots of Sophora flavescens (Kushen) of the family Fabaceae. Against lung, breast, and liver cancer cells, MT and OMT inhibit cell proliferation; induce cell cycle arrest, apoptosis, and autophagy; restrict angiogenesis; and inhibit cell metastasis, invasion, and migration. The processes involve various molecular targets and signaling pathways. CKI is a traditional Chinese medicine (TCM) composed of root extracts of S. flavescens and Smilax glabra (Baituling) of the family Smilacaceae. With MT and OMT as major components, CKI has been approved for the treatment of cancer in China more than 20 years ago. In recent years, systematic reviews and meta-analysis have been undertaken to evaluate the anticancer effects of CKI. When CKI is used alone and in combination with chemotherapy of western medicine, there is much to be learned concerning their interactions besides their individual and integrated efficacy. Some perspectives of MT, OMT, and CKI are discussed, and their suggestions for future research are provided. 相似文献
48.
49.
目的:探讨轴向载荷分担比用于胫腓骨骨干骨折术后指导外固定器轴向动力化促进骨折愈合的有效性。方法:选取外固定器治疗的胫腓骨骨干骨折患者100例,随机分为观察组50例,对照组50例。观察组在轴向载荷分担比指导下行外固定器轴向动力化治疗,对照组未行动力化,随访比较两组的治疗效果。结果:所有患者均获随访,随访时间4~12个月,平均6.5个月,治疗期间所有患者均未出现外固定针断裂、松动及再骨折等并发症,观察组1例骨搬移患者轴向载荷分担比5%,X线片显示骨折断端有连续性骨痂通过,拆除外固定器连接杆后发生移位,恢复原数值行轴向加压再动力化,现已愈合。观察组除外1例骨搬移患者,其余49例患者外固定器固定时间为[(24.4±4.7)周],骨折临床愈合时间为[(22.4±4.7)周],与对照组50例患者外固定器固定时间[(29.3±5.6)周],骨折临床愈合时间[(27.3±5.6)周]比较,显著减少(P0.05)。结论:外固定器轴向载荷分担比指导胫腓骨骨干骨折外固定术后轴向动力化可以加速骨折愈合,但不适合骨搬移截骨端已硬化患者。 相似文献
50.
Discoid lupus erythematosus (DLE) is the most common skin manifestation of lupus; however, the molecular mechanisms underlying DLE remain unknown. Therefore, we aimed to identify key differentially expressed genes (DEGs) in discoid lupus skin and investigate their potential pathways.To identify candidate genes involved in the occurrence and development of the disease, we downloaded the microarray datasets and GSE52471 from the Gene Expression Database (GEO). DEGs between discoid lupus skin and normal controls were selected using the GEO2R tool and Venn diagram software ( GSE72535http://bioinformatics.psb.ugent.be/webtools/Venn/). The Database for Annotation, Visualization, and Integrated Discovery (DAVID), Enrichr, and Cytoscape ClueGo were used to analyze the Kyoto Encyclopedia of Gene and Genome pathways and gene ontology. Protein-protein interactions (PPIs) of these DEGs were further assessed using the Search Tool for the Retrieval Interacting Genes version 10.0.Seventy three DEGs were co-expressed in both datasets. DEGs were predominantly upregulated in receptor signaling pathways of the immune response. In the PPI network, 69 upregulated genes were selected. Furthermore, 4 genes (CXCL10, ISG15, IFIH1, and IRF7) were found to be significantly upregulated in the RIG-I-like receptor signaling pathway, from analysis of Enrichr and Cytoscape ClueGo.The results of this study may provide new insights into the potential molecular mechanisms of DLE. However, further experimentation is required to confirm these findings. 相似文献