全文获取类型
收费全文 | 35197篇 |
免费 | 3747篇 |
国内免费 | 2315篇 |
专业分类
耳鼻咽喉 | 385篇 |
儿科学 | 419篇 |
妇产科学 | 293篇 |
基础医学 | 4288篇 |
口腔科学 | 468篇 |
临床医学 | 3991篇 |
内科学 | 5698篇 |
皮肤病学 | 808篇 |
神经病学 | 2085篇 |
特种医学 | 1761篇 |
外国民族医学 | 7篇 |
外科学 | 3505篇 |
综合类 | 5161篇 |
现状与发展 | 4篇 |
一般理论 | 3篇 |
预防医学 | 2237篇 |
眼科学 | 927篇 |
药学 | 3949篇 |
18篇 | |
中国医学 | 2403篇 |
肿瘤学 | 2849篇 |
出版年
2024年 | 198篇 |
2023年 | 662篇 |
2022年 | 1489篇 |
2021年 | 1852篇 |
2020年 | 1244篇 |
2019年 | 1289篇 |
2018年 | 1340篇 |
2017年 | 1224篇 |
2016年 | 1364篇 |
2015年 | 1868篇 |
2014年 | 2146篇 |
2013年 | 2114篇 |
2012年 | 2881篇 |
2011年 | 2943篇 |
2010年 | 1971篇 |
2009年 | 1539篇 |
2008年 | 1776篇 |
2007年 | 1751篇 |
2006年 | 1615篇 |
2005年 | 1548篇 |
2004年 | 1151篇 |
2003年 | 1256篇 |
2002年 | 1082篇 |
2001年 | 881篇 |
2000年 | 692篇 |
1999年 | 566篇 |
1998年 | 371篇 |
1997年 | 362篇 |
1996年 | 284篇 |
1995年 | 232篇 |
1994年 | 217篇 |
1993年 | 147篇 |
1992年 | 141篇 |
1991年 | 155篇 |
1990年 | 136篇 |
1989年 | 127篇 |
1988年 | 106篇 |
1987年 | 92篇 |
1986年 | 84篇 |
1985年 | 62篇 |
1984年 | 35篇 |
1983年 | 13篇 |
1982年 | 23篇 |
1981年 | 29篇 |
1980年 | 26篇 |
1979年 | 24篇 |
1978年 | 14篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1974年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
目的:介绍气功对顽固性失眠的治疗措施。方法:从失眠的病因病机、周天功及六字诀治疗失眠的功理等入手详细分析了治疗的原理和原则。结果:将周天功与六字诀相配合可以有效地取长补短,达到心火下降,肾水上滋,心肾相交的效果。结论:气功对于顽固性失眠具有良好的治疗效果。 相似文献
103.
Saier Wang Ying Shi Huiming Xiang Ru Liu Lianghu Su Longjiang Zhang Rongting Ji 《RSC advances》2022,12(35):22760
Biochar has attracted great interest in both CO2 capture and supercapacitor applications due to its unique physicochemical properties and low cost. Fabrication of eco-friendly and cost-effective biochar from high potential biomass Tenebrio molitor feces can not only realize the functional application of waste, but also a potential way of future carbon capture and energy storage technology. In this study, a novel KOH activation waste-fed Tenebrio molitor feces biochar (TMFB) was developed and investigated in terms of CO2 capture and electrochemical performance. When activated at 700 °C for 1 h, the specific surface area of the feces biochar (TMFB-700A) increased significantly from 232.1 to 2081.8 m2 g−1. In addition, well-developed pore distribution facilitates CO2 capture and electrolyte diffusion. TMFB-700A can quickly adsorb a large amount of CO2 (3.05 mol kg−1) with excellent recycling performance. TMFB-700A also exhibited promising electrochemical performance (335.8 F g−1 at 0.5 A g−1) and was used as electrode material in a symmetrical supercapacitor. It provided a high energy density of 33.97 W h kg−1 at a power density of 0.25 kW kg−1 with 90.47% capacitance retention after 10 000 charge–discharge cycles. All the results demonstrated that TMFB could be a potential bifunctional material and provided valuable new insights for Tenebrio molitor feces high-value utilization.Biochar has attracted great interest in both CO2 capture and supercapacitor applications due to its unique physicochemical properties and low cost. 相似文献
104.
Four new 3-methyl-4-ethylideneproline-containing peptides, lucentamycins A-D (1-4), have been isolated from the fermentation broth of a marine-derived actinomycete identified by phylogenetic methods as Nocardiopsis lucentensis (strain CNR-712). The planar structures of the new compounds were assigned on the basis of 1D and 2D NMR spectroscopic techniques, while the absolute configurations of the amino acid residues were determined by application of the advanced Marfey method. Lucentamycins A (1) and B (2) showed significant in vitro cytotoxicity against HCT-116 human colon carcinoma. 相似文献
105.
Xiao-Yun Li Pei-Xuan Ji Xi-Xi Ni Yu-Xin Chen Li Sheng Min Lian Can-Jie Guo Jing Hua 《World journal of hepatology》2022,14(7):1365
BACKGROUNDLipid metabolism disorder and inflammatory-immune activation are vital triggers in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Various studies have shown that PPAR-γ exerts potent anti-inflammatory and immunomodulatory properties. However, little is known about the regulation of PPAR-γ activity in modulating cell crosstalk in NAFLD.AIMTo investigate whether the regulation of PPAR-γ activity in lipid-laden hepatocytes affects macrophage polarization and inflammation.METHODSPrimary hepatocytes were isolated from wild-type C57BL6/J mice or hepatocyte-specific PPAR-γ knockout mice and incubated with free fatty acids (FFAs). Macrophages were incubated with conditioned medium (CM) from lipid-laden hepatocytes with or without a PPAR-γ agonist. Wild-type C57BL/6J mice were fed a high-fat (HF) diet and administered rosiglitazone.RESULTSPrimary hepatocytes exhibited significant lipid deposition and increased ROS production after incubation with FFAs. CM from lipid-laden hepatocytes promoted macrophage polarization to the M1 type and activation of the TLR4/NF-κB pathway. A PPAR-γ agonist ameliorated oxidative stress and NLRP3 inflammasome activation in lipid-laden hepatocytes and subsequently prevented M1 macrophage polarization. Hepatocyte-specific PPAR-γ deficiency aggravated oxidative stress and NLRP3 inflammasome activation in lipid-laden hepatocytes, which further promoted M1 macrophage polarization. Rosiglitazone administration improved oxidative stress and NLRP3 inflammasome activation in HF diet-induced NAFLD mice in vivo.CONCLUSIONUpregulation of PPAR-γ activity in hepatocytes alleviated NAFLD by modulating the crosstalk between hepatocytes and macrophages via the reactive oxygen species-NLRP3-IL-1β pathway. 相似文献
106.
107.
百令胶囊在肾移植术后早中期的应用研究 总被引:4,自引:1,他引:4
为研究百令胶囊在肾移植术后早,中期的免疫抑制作用,将肾移植患者分为3组,A组为百令胶囊+Pred+CsA,B组为百令胶囊+Pred+CsA+AzaC组为Pred+CsA+Aza。结果:1.急性排斥发生情况:A组16.5%(33/200),B组11.79%(33/280),C组16%(16/100),2.肝功能损害情况;A组18.5%,B组为21.07%,C组25%,3.白细胞下降,A组无,B组12 相似文献
108.
Incorporation of high‐dose 131I‐metaiodobenzylguanidine treatment into killer immunoglobulin‐like receptor/HLA‐ligand mismatched haploidentical stem cell transplantation for children with neuroblastoma who failed tandem autologous stem cell transplantation 下载免费PDF全文
109.
非穿透性小梁手术超声生物显微镜检查 总被引:16,自引:2,他引:16
目的:应用超声生物显微镜(UBM)检查技术,探讨非穿透性小梁手术联合透明质酸钠生物胶植入手术区域解剖特点和房水引汉机制。方法:对14例16只眼行非穿透性小梁手术联合透明质酸钠生物胶植入的患者,在术后1~3个月内进行手术区域UBM检查。检查的指标(项目)包括:巩膜瓣下形成液间腔的大小(宽和高)、透明质酸钠生物胶吸收的情况、剩余角膜小梁膜的厚度以及滤过泡的形态,并对结果进行分析。结果:16只眼术前平均 相似文献
110.