全文获取类型
收费全文 | 55420篇 |
免费 | 4984篇 |
国内免费 | 3118篇 |
专业分类
耳鼻咽喉 | 854篇 |
儿科学 | 693篇 |
妇产科学 | 618篇 |
基础医学 | 7452篇 |
口腔科学 | 1063篇 |
临床医学 | 6618篇 |
内科学 | 9271篇 |
皮肤病学 | 812篇 |
神经病学 | 3299篇 |
特种医学 | 2778篇 |
外国民族医学 | 21篇 |
外科学 | 6040篇 |
综合类 | 6252篇 |
现状与发展 | 13篇 |
一般理论 | 5篇 |
预防医学 | 3215篇 |
眼科学 | 1301篇 |
药学 | 5602篇 |
38篇 | |
中国医学 | 2439篇 |
肿瘤学 | 5138篇 |
出版年
2024年 | 171篇 |
2023年 | 865篇 |
2022年 | 2149篇 |
2021年 | 3021篇 |
2020年 | 2188篇 |
2019年 | 2010篇 |
2018年 | 2051篇 |
2017年 | 1837篇 |
2016年 | 1835篇 |
2015年 | 2663篇 |
2014年 | 3079篇 |
2013年 | 2994篇 |
2012年 | 4286篇 |
2011年 | 4540篇 |
2010年 | 2807篇 |
2009年 | 2240篇 |
2008年 | 2969篇 |
2007年 | 2898篇 |
2006年 | 2710篇 |
2005年 | 2549篇 |
2004年 | 1880篇 |
2003年 | 1720篇 |
2002年 | 1430篇 |
2001年 | 1140篇 |
2000年 | 1124篇 |
1999年 | 1148篇 |
1998年 | 632篇 |
1997年 | 607篇 |
1996年 | 481篇 |
1995年 | 430篇 |
1994年 | 397篇 |
1993年 | 230篇 |
1992年 | 374篇 |
1991年 | 287篇 |
1990年 | 277篇 |
1989年 | 253篇 |
1988年 | 230篇 |
1987年 | 204篇 |
1986年 | 166篇 |
1985年 | 126篇 |
1984年 | 83篇 |
1983年 | 69篇 |
1982年 | 29篇 |
1981年 | 42篇 |
1980年 | 26篇 |
1979年 | 37篇 |
1978年 | 23篇 |
1977年 | 24篇 |
1976年 | 32篇 |
1974年 | 25篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
The results indicated that RSM could significantly inhibit the lipid peroxidation of normal livers and cultured hepatocytes of rats, induce liver microsomal cytochrome P450 in normal rats, increase nucleic acids, proteins, urea and cerolloplasmin of damaged cultured hepatocytes of rats, relieve ultrastructural damage of cultured hepatocytes induced by CCl4. The pharmacological actions mentioned above should be considered as important mechanisms of RSM against liver injury. 相似文献
102.
David A Grimes J David Grimes Lem Racacho Kylie A Scoggan Fabin Han Betty Anne Schwarz John Woulfe Dennise Bulman 《Movement disorders》2002,17(6):1205-1212
The identification of rare, large families with Parkinson's disease (PD) has provided important clues that have contributed to our understanding of this complex disorder. We have identified a large French-Canadian kindred that spans five generations consisting of more than 90 individuals. A total of 65 individuals now have been examined, had venous blood drawn, and DNA extracted. Two-point and multipoint linkage analysis was performed to assess linkage to known PD genes or loci. Within the third and fourth generations of this family there are 10 living, plus 3 deceased members with well-documented levodopa responsive parkinsonism. Autopsy results on 1 member demonstrated the loss of pigmented neurons in the substantia nigra and the presence of alpha-synuclein positive Lewy bodies. Four of the PD patients have prominent postural and kinetic tremors that preceded their parkinsonism by up to 10 years. Two other individuals within the family have prominent isolated postural and kinetic tremors without parkinsonism. The alpha-synuclein(4q21.3-23), Parkin(6q25.2-27), PARK3 (2p13), PARK4, and ubiquitin carboxy terminal hydrolase-L1 (4p14-16.3) and PARK6 and PARK7 (1p35-36) loci were excluded in this kindred using closely linked markers. The clinical and pathological features of this family are consistent with the diagnosis of PD. This family further demonstrates the known genetic heterogeneity in PD and is large enough that a genome-wide screen has been undertaken in an effort to identify a novel PD gene. 相似文献
103.
A case of a paraffinoma in the urinary bladder is presented. Plain radiography and intravenous urography showed a low attenuation filling defect in the urinary bladder, and CT demonstrated a lobulated fat-attenuation mass floating in the urinary bladder. 相似文献
104.
105.
106.
107.
Tang De-ji汤德骥 Xu Ying-han徐英含 Dai Di戴迪 Han Yong-jian韩永坚Wang Bi-chang王必瑺 Lang Ya-min郎亚民and Liang Yi梁毅Department of Hematology Pathology ZhejiangMedical University HangzhouZeng Yi曾毅Institute of Virology Chinese Academy of Preventive Medicine Beijing 《中华医学杂志(英文版)》1989,102(11):819-824
Human immunodeficiency virus (HIV) is now considered as the causative agent of acquired immunodeficiency syndrome (AIDS). A high risk of AIDS has been reported among patients with hemophilia who received lyophilized commercial factor VIII and IX concentrates of American origin. At a prevalent survey from September to December 1985, HIV antibodies were found in all four patients with hemophilia treated with the batch number W87307, 955 I.U. of American commercial factor VIII concentrate supplied by Armour Pharmaceutical Company, USA. One of the sero-positive patients developed AIDS-related complex (ARC) and died of cerebral hemorrhage. The other three sero-positive patients had abnormalities in cell-mediated immunity. Of them two developed left lumbosacral radiculopathy and hemorrhagic herpes zoster and one remained well so far. 相似文献
108.
109.
Byung Hoon Han Myung Hwan Park Yong Nam Han Lin Keun Woo 《Archives of pharmacal research》1986,9(1):21-23
Over twelve alkaloids were delected in the roots ofPanax ginseng C.A. Meyer. Among them three alkaloids were isolated and were identified as N9-formylharman, ethyl β-carboline-1-carboxylate and perlolyrine on the basis of spectroscopic studies. 相似文献
110.
The popularization and application of cold storage red blood cells or whole blood at −80 °C of the Rh(D) negative patients in surgical operation 总被引:2,自引:0,他引:2
Summary The efficiency of cold storage red blood cells (CSRBC) or whole blood at −80 °C used in 27 Rh(D) negative patients during
surgical operation was reported. The Rh(D) negative patients received the transfusion of CSRBC or whole blood stored at −80
°C for 180 to 360 days. The changes in the indexes, such as blood TB, DB, K+, Na+, BUN, Cr, urine protein (URPO), UOB, Hb, HCT, serum total protein, relative to hemolytic reaction and blood volume before
and after transfusion were observed. The results showed that after transfusion of CSRBC or whole blood 27 cases were negative
for urine protein and UOB, and the levels of BUN and Cr were normal (P>0.05). Blood TB, DB, Hb, and HCT were increased, while pH, blood K+ and blood Na+ was normal with the difference being not significant before and after operation (P>0.05). Plasma protein was decreased, but there was no significant difference before and after operation (P>0.05). It was suggested that CSRBC or whole blood at −80 °C could be safely infused to the Rh(D) negative patients without
side effects during the surgical operation.
YU Zhongqing, male, born in 1957, Technician in Charge 相似文献