全文获取类型
收费全文 | 1533篇 |
免费 | 113篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 66篇 |
妇产科学 | 10篇 |
基础医学 | 201篇 |
口腔科学 | 14篇 |
临床医学 | 92篇 |
内科学 | 481篇 |
皮肤病学 | 45篇 |
神经病学 | 196篇 |
特种医学 | 27篇 |
外科学 | 185篇 |
综合类 | 14篇 |
预防医学 | 51篇 |
眼科学 | 17篇 |
药学 | 109篇 |
中国医学 | 16篇 |
肿瘤学 | 78篇 |
出版年
2023年 | 27篇 |
2022年 | 31篇 |
2021年 | 63篇 |
2020年 | 33篇 |
2019年 | 53篇 |
2018年 | 57篇 |
2017年 | 38篇 |
2016年 | 43篇 |
2015年 | 41篇 |
2014年 | 58篇 |
2013年 | 46篇 |
2012年 | 97篇 |
2011年 | 81篇 |
2010年 | 54篇 |
2009年 | 28篇 |
2008年 | 74篇 |
2007年 | 60篇 |
2006年 | 67篇 |
2005年 | 56篇 |
2004年 | 40篇 |
2003年 | 56篇 |
2002年 | 57篇 |
2001年 | 59篇 |
2000年 | 55篇 |
1999年 | 39篇 |
1998年 | 15篇 |
1997年 | 16篇 |
1996年 | 7篇 |
1995年 | 7篇 |
1993年 | 7篇 |
1992年 | 25篇 |
1991年 | 36篇 |
1990年 | 21篇 |
1989年 | 25篇 |
1988年 | 19篇 |
1987年 | 17篇 |
1986年 | 18篇 |
1985年 | 17篇 |
1984年 | 8篇 |
1983年 | 6篇 |
1979年 | 11篇 |
1973年 | 4篇 |
1972年 | 6篇 |
1971年 | 6篇 |
1970年 | 9篇 |
1969年 | 6篇 |
1968年 | 6篇 |
1967年 | 4篇 |
1966年 | 6篇 |
1965年 | 4篇 |
排序方式: 共有1648条查询结果,搜索用时 0 毫秒
1.
Nagai Masahiro Nishikawa Noriko Yabe Hayato Moritoyo Hiroyoko Moritoyo Takashi Shigematsu Yuji Nomoto Masahiro 《Journal of neurology》2007,254(4):IV54-IV57
Journal of Neurology - A high incidence of valvular heart disease in Parkinson's disease (PD) patients treated with ergot-derived dopamine agonists, such as cabergoline and pergolide, has been... 相似文献
2.
Tsuyoshi Takeda Hiroyuki Ishida Yukio Horiuchi Yasushi Nakao Yutaka Yabe 《Journal of orthopaedic science》1997,2(6):372-377
We examined radiographs of the elbows of the pitching arms of 79 professional baseball pitchers (mean age, 25.1 years; mean
duration of professional career, 4.7 years) and noted the frequency and size of spurs, bone fragments, and intra-articular
loose bodies according to site. The influence of duration of professional baseball career on these osteoarthritic changes
was also investigated. The olecranon tip was the most frequent site of spurs (62/79; 78.5%), and fragmentation of the spur
was detected in 17 joints. The frequency of spurs was also high at the medial margin of the olecranon, the tip of the coronoid
process, the medial margin of the sigmoid notch, the medial margin of the trochlea and the olecranon fossa. In 38 subjects,
spurs were observed at the distal portion of the radial notch of the ulna. However, few pitchers had osteoarthritic changes
in the humeral capitellum or radial head. Intra-articular loose bodies were detected in 4 of 79 joints (5.1%), and bone fragments
were present below the medial humeral epicondyle in 25 of 79 joints (31.6%). Osteoarthritic changes in the elbow joint appeared
to be attributable mainly to traction stress and impingement associated with extension and valgus strain. Significant osteoarthritic
changes were often found in professional pitchers whose careers exceeded 5 years. 相似文献
3.
4.
Hironari Takaishi Osamu Nemoto Masanobu Shiota Toshiyuki Kikuchi Harumoto Yamada Masaaki Yamagishi Yutaka Yabe 《Journal of orthopaedic research》1997,15(4):528-538
To clarify phenotypic alterations of intervertebral disc cells during the repair process, we cloned partial type-II collagen cDNA from rabbits and analyzed the level of expression of type-II collagen mRNA in disc degeneration. An animal model was created by surgical denucleation of rabbit intervertebral discs through, an extraperitoneal approach. Eight animals each from an experimental and a control group were killed at 2, 4, 8, or 16 weeks postoperatively, and the disc samples were used for this study. Round chondrorcyte-like cells that filled the herniated space showed intense signal of type-II collagen mRNA and significant pericellular immunostaining of type-II collagen but no clear staining of type-I collagen. Northern. blot analysis revealed that the expression of type-II collagen mRNA of the repair disc cells was transiently increased at 4 weeks postoperatively. The cells were able to change their morphology in response to mechanical stimulation by surgical denucleation and to induce a significant increase in the gene expression of type-II collagen at an early phase of disc degeneration. The present results indicate the transient enhancement of repair activity in the degenerative process of injured fibrocartilage. 相似文献
5.
O Shinohara S Kato H Yabe M Yabe C Kubota R Mitsuda M Kimura 《The American journal of pediatric hematology/oncology》1991,13(3):263-268
Growth of the patients with hematological malignancies, aplastic anemia, Fanconi's anemia, and Wiscott-Aldrich syndrome who had been treated with bone marrow transplantation (BMT) was studied. Fourteen out of 21 patients showed suppression of linear growth after BMT. Recovery of the growth velocity after 1-2 years tended to occur if BMT was performed at younger age. Six of eight patients with chronic graft-versus-host-disease (CGVHD) had impaired growth after BMT, whereas eight of 13 (61%) without CGVHD did. Provocative tests for growth hormone (GH) performed 5-72 months after BMT revealed three boys who showed poor response to more than two different stimuli. Two of these three boys had prolonged suppression of growth. Neither the age at BMT, difference in disease, nor presence of posttransplant growth retardation gave significant difference in the response of GH to provocative tests. It was concluded that approximately two-thirds of marrow-grafted children experienced transient decrease in growth velocity after BMT. 相似文献
6.
J Yamazaki H Ohsawa T Uchi M Iida M Wakakura K Okamoto H Hosoi T Morishita H Nakano Y Yabe 《呼吸と循環》1992,40(3):275-281
201Tl myocardial SPECT was performed in cases of dilated cardiomyopathy and valvular heart disease with left ventricular eccentric hypertrophy, and the two groups were compared from the standpoint of the mechanism of onset of myocardial disorders. Significant coefficients of correlation were seen between the Tl score and LVDd (r = 0.792, r = 0.785) and Tl score and LVEF (r = -0.634, r = -0.555) in both dilated cardiomyopathy and valvular heart disease. In cases of valvular heart disease, significant correlation coefficients (r = -0.756, r = -0.720) between LVDd and r-WR (relative-washout rate), and Tl score and r-WR were observed, but no such correlation was seen in dilated cardiomyopathy. In valvular heart disease, a decrease in myocardial perfusion associated with enlargement of the left ventricle appeared, while in dilated cardiomyopathy, there was a marked decrease in LVEF in proportion to the thallium defect. Therefore, it was assumed that left ventricular wall disorders occur due to myocardial metabolic disorders and coronary microcirculation disorders. 相似文献
7.
8.
Nakanishi M Yabe S Tanaka N Ito Y Nakamura KT Kitade Y 《Molecular and biochemical parasitology》2005,143(2):146-151
S-adenosylhomocysteine hydrolase is a prospective target for developing new anti-malarial drugs. Inhibition of the hydrolase results in an anti-cellular effect due to the suppression of adenosylmethionine-dependent transmethylations. Based on the crystal structure of Plasmodium falciparum S-adenosylhomocysteine hydrolase which we have determined recently, we performed mutational analyses on P. falciparum and human enzymes. Cys59 and Ala84 of the parasite enzyme, and the equivalent residues on the human enzyme, Thr60 and Gln85, were examined. Mutations of Cys59 and Thr60 caused dramatic impact on inhibition by 2-fluoronoraristeromycin without significant effect both on its kinetic parameters and on inhibition constant against noraristeromycin. In addition, the impact was independent from the electronegativity of the side chain of the substituting residue. These results showed that steric hindrance between a functional group at the 2-position of an adenine nucleoside inhibitor and Thr60 of the human enzyme, not an electrostatic effect, contributed to inhibitor selectivity. 相似文献
9.
10.
Hisashi Aoki Reiko Tsukahara Kyonosuke Yabe 《European journal of applied physiology》1989,58(4):426-432
Summary The effects of pre-motion silent period (PSP) on dynamic force exertion were studied in ten healthy subjects performing ballistic elbow extensions. The experiments were designed to evaluate the significance of mean differences between the averaged dynamic force curves of two groups: PSP-presence groups and PSP-absence groups. The presence of PSP was judged quantitatively and automatically by means of a newly developed method using statistical analysis. The results indicated that there were two effects of PSP on dynamic force exertion: one was a reducing effect, observed prior to the movement; the other was a reinforcing effect, observed in the first part of the ballistic movement. The duration of the reinforcement was significantly correlated with the duration of the reducing effect of PSP. The findings suggested that the reinforcement of dynamic force may be produced by the pre-stretch of agonistic muscles caused by prior force reduction due to PSP occurrence. The fact that PSP plays an important role in dynamic force exertion suggests that PSP may be incorporated in the central motor control system designed to interrupt the background activity, to stretch the agonist and to reinforce the dynamic force. 相似文献