全文获取类型
收费全文 | 41336篇 |
免费 | 3973篇 |
国内免费 | 2742篇 |
专业分类
耳鼻咽喉 | 340篇 |
儿科学 | 547篇 |
妇产科学 | 474篇 |
基础医学 | 4856篇 |
口腔科学 | 708篇 |
临床医学 | 5258篇 |
内科学 | 6016篇 |
皮肤病学 | 365篇 |
神经病学 | 1809篇 |
特种医学 | 1480篇 |
外国民族医学 | 31篇 |
外科学 | 4437篇 |
综合类 | 7554篇 |
现状与发展 | 14篇 |
一般理论 | 3篇 |
预防医学 | 2829篇 |
眼科学 | 1119篇 |
药学 | 4378篇 |
48篇 | |
中国医学 | 2417篇 |
肿瘤学 | 3368篇 |
出版年
2024年 | 181篇 |
2023年 | 759篇 |
2022年 | 1857篇 |
2021年 | 2359篇 |
2020年 | 1672篇 |
2019年 | 1397篇 |
2018年 | 1381篇 |
2017年 | 1325篇 |
2016年 | 1175篇 |
2015年 | 1856篇 |
2014年 | 2259篇 |
2013年 | 2055篇 |
2012年 | 2975篇 |
2011年 | 3283篇 |
2010年 | 2052篇 |
2009年 | 1676篇 |
2008年 | 2096篇 |
2007年 | 2244篇 |
2006年 | 2061篇 |
2005年 | 1939篇 |
2004年 | 1374篇 |
2003年 | 1358篇 |
2002年 | 1263篇 |
2001年 | 1000篇 |
2000年 | 960篇 |
1999年 | 1004篇 |
1998年 | 565篇 |
1997年 | 594篇 |
1996年 | 453篇 |
1995年 | 425篇 |
1994年 | 381篇 |
1993年 | 211篇 |
1992年 | 268篇 |
1991年 | 251篇 |
1990年 | 257篇 |
1989年 | 200篇 |
1988年 | 171篇 |
1987年 | 136篇 |
1986年 | 133篇 |
1985年 | 98篇 |
1984年 | 73篇 |
1983年 | 41篇 |
1982年 | 27篇 |
1981年 | 22篇 |
1979年 | 20篇 |
1977年 | 16篇 |
1975年 | 14篇 |
1974年 | 19篇 |
1972年 | 13篇 |
1969年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
目的 分析HBV患者YKL-40、CA19-9、GP73水平差异及与患者病情轻重程度的相关性,探讨HBV患者病情的判定指标。方法 选取2015年5月—2018年5月收治的100例HBV患者,其中慢性HBV感染组40例、慢性乙型肝炎组36例、HBV相关肝硬化组24例,同期选择我院健康体检的健康者50例作为健康对照组;检测患者血中YKL-40、CA19-9、GP73水平;分析HBV感染患者血清YKL-40、CA19-9、GP73水平与病情轻重程度的相关性。结果 慢性HBV感染、慢性乙型肝炎及HBV相关肝硬化患者血中YKL-40水平分别为(36.38±4.19)ng/mL 、(49.02±4.32)ng/mL、(65.14±5.21)ng/mL ,CA19-9分别为(12.03±1.03)KU/L、(13.84±0.98)KU/L、(16.94±0.81)KU/L,GP73分别为(47.22±5.38)ng/mL 、(98.53±10.24)ng/mL 、(229.85±12.19)ng/mL,均明显高于对照组的(28.19±3.27)ng/mL 、(7.34±0.92)KU/L 、(30.93±3.89)ng/mL,均P=0.000 0。随着慢性HBV感染者、慢性乙型肝炎患者和不同HBV相关肝硬化患者肝脏炎症及纤维化程度加重,患者血中YKL-40、CA19-9和GP73也随之显著增加,均P=0.000 0;YKL-40、CA19-9和GP73均是影响HBV感染患者体内炎症坏死及肝脏纤维化的独立性影响因素,差异有统计学意义(P<0.05)。结论 HBV感染患者血清中YKL-40、CA19-9、GP73水平是HBV感染患者病情轻重程度的独立性影响因素。 相似文献
13.
Yuanqing Yao Jun Qian Shunkang Rong Yuwen Huang Bo Xiong Gang Yang Dengqing Zhang Shimin Deng Jie Tan Que Zhu Changming Deng Dichuan Liu Haitao Ran Zhigang Wang Jing Huang 《Ultrasound in medicine & biology》2019,45(2):490-499
Stellate ganglion (SG) modification has been investigated for arrhythmia treatment. In this study, transesophageal SG imaging and intervention were explored using a homemade 30F integrated focused ultrasonic catheter in healthy mongrel canines in vivo. Anatomic details of SGs were ultrasonically imaged and evaluated. SG had a heterogeneous echoic structure and characteristic profiles sketched by hyper-echoic outlines in an ultrasonogram. Left SGs in the experimental group were successfully ablated through the esophagus under ultrasonic guidance provided by the catheter itself. Two weeks after the ablation, the QT and QTc of the experimental group decreased compared with those of the sham group and at baseline (both p values < 0.001). Histologic examination revealed that left SGs were destroyed. No major complications were observed. This approach may be further explored as a method for ganglia remodeling evaluation and as a strategy of ganglia modification for arrhythmia and for other diseases. 相似文献
14.
15.
16.
Xue Yao Yan Zhang Jian Hao Hui-Quan Duan Chen-Xi Zhao Chao Sun Bo Li Bao-You Fan Xu Wang Wen-Xiang Li Xuan-Hao Fu Yong Hu Chang Liu Xiao-Hong Kong Shi-Qing Feng 《中国神经再生研究》2019,(3)
Ferroptosis is an iron-dependent novel cell death pathway. Deferoxamine, a ferroptosis inhibitor, has been reported to promote spinal cord injury repair. It has yet to be clarified whether ferroptosis inhibition represents the mechanism of action of Deferoxamine on spinal cord injury recovery. A rat model of Deferoxamine at thoracic 10 segment was established using a modified Allen's method. Ninety 8-week-old female Wistar rats were used. Rats in the Deferoxamine group were intraperitoneally injected with 100 mg/kg Deferoxamine 30 minutes before injury. Simultaneously, the Sham and Deferoxamine groups served as controls. Drug administration was conducted for 7 consecutive days. The results were as follows:(1) Electron microscopy revealed shrunken mitochondria in the spinal cord injury group.(2) The Basso, Beattie and Bresnahan locomotor rating score showed that recovery of the hindlimb was remarkably better in the Deferoxamine group than in the spinal cord injury group.(3) The iron concentration was lower in the Deferoxamine group than in the spinal cord injury group after injury.(4) Western blot assay revealed that, compared with the spinal cord injury group, GPX4, xCT, and glutathione expression was markedly increased in the Deferoxamine group.(5) Real-time polymerase chain reaction revealed that, compared with the Deferoxamine group, mRNA levels of ferroptosis-related genes Acyl-CoA synthetase family member 2(ACSF2) and iron-responsive element-binding protein 2(IREB2) were up-regulated in the Deferoxamine group.(6) Deferoxamine increased survival of neurons and inhibited gliosis. These findings confirm that Deferoxamine can repair spinal cord injury by inhibiting ferroptosis. Targeting ferroptosis is therefore a promising therapeutic approach for spinal cord injury. 相似文献
17.
18.
19.
Fuying Chen Linting Huang Changcan Li Jia Zhang Weiqin Yang Beibei Zhang Huaguo Li Dan Deng Jianying Liang Jinwen Shen Zhirong Yao Ming Li 《Clinical genetics》2020,98(2):179-184
Epidermolysis bullosa (EB) is a heritable blistering disorder. We performed a next-generation sequencing-based multigene panel test and successfully predicted 100% of the EB types, including, 36 EB simplex (EBS), 13 junctional EB (JEB), 86 dystrophic EB (DEB), and 3 Kindler EB. Chinese JEB and recessive DEB (RDEB) patients have relatively mild phenotypes; for severe type separately accounts for 45.5% and 23.8%, respectively. We identified 96 novel and 49 recurrent pathogenic variants in 11 genes, although we failed to detect the second mutation in one JEB and five RDEB patients. We identified one novel p.E475K mosaic mutation in the clinically normal mother of one out of 13 EBS patients with KRT5 mutations, one recurrent p.G2034R mosaic mutation, and one novel p.G2043R mosaic mutation in the clinically normal relatives of two out of 19 dominant DEB patients. This study shows that next-generation technology could be an effective tool in diagnosing EB. 相似文献
20.