全文获取类型
收费全文 | 518篇 |
免费 | 29篇 |
国内免费 | 37篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 13篇 |
妇产科学 | 29篇 |
基础医学 | 55篇 |
口腔科学 | 8篇 |
临床医学 | 65篇 |
内科学 | 164篇 |
皮肤病学 | 6篇 |
神经病学 | 59篇 |
特种医学 | 15篇 |
外科学 | 71篇 |
综合类 | 15篇 |
预防医学 | 23篇 |
药学 | 45篇 |
肿瘤学 | 15篇 |
出版年
2021年 | 8篇 |
2019年 | 5篇 |
2018年 | 10篇 |
2016年 | 5篇 |
2015年 | 4篇 |
2014年 | 8篇 |
2013年 | 14篇 |
2012年 | 11篇 |
2011年 | 11篇 |
2010年 | 8篇 |
2009年 | 9篇 |
2008年 | 13篇 |
2007年 | 25篇 |
2006年 | 18篇 |
2005年 | 17篇 |
2004年 | 9篇 |
2003年 | 19篇 |
2002年 | 19篇 |
2001年 | 22篇 |
2000年 | 20篇 |
1999年 | 8篇 |
1998年 | 14篇 |
1997年 | 9篇 |
1996年 | 6篇 |
1995年 | 11篇 |
1994年 | 10篇 |
1993年 | 10篇 |
1992年 | 15篇 |
1991年 | 16篇 |
1990年 | 18篇 |
1989年 | 18篇 |
1988年 | 26篇 |
1987年 | 12篇 |
1986年 | 18篇 |
1985年 | 10篇 |
1984年 | 9篇 |
1983年 | 11篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 8篇 |
1978年 | 10篇 |
1977年 | 4篇 |
1976年 | 9篇 |
1975年 | 4篇 |
1974年 | 9篇 |
1973年 | 7篇 |
1972年 | 3篇 |
1971年 | 5篇 |
1970年 | 5篇 |
排序方式: 共有584条查询结果,搜索用时 15 毫秒
81.
ABSTRACT. Révész, T., Szigeti, R. and Schuler, D. (Second Department of Paediatrics, Semmelweis University Medical School, Budapest, Hungary). The role of serum factors in the lymphocyte transformation test of children with acute leukaemia. Acta Paediatr Scand, 63: 715, 1974.—PHA-induced lymphocyte transformation tests were carried out in 14 children who were in full remission of acute lymphoblastic leukaemia and in 12 controls. Stimulation was assessed on the basis of tritiated thymidine uptake. For an adequate testing of lymphocyte reactivity, dose-response curves were established for each child. No significant difference could be observed in either the maximum response, or the shape of the curve, between the leukaemic and the control groups. Supplementation of the culture medium with autologous plasma instead of AB serum did not result in any significant inhibition or stimulation of lymphocyte reactivity to PHA. The lymphocyte response of both leukaemic and control children, however, was greatly reduced when sera from untreated leukaemic children was used. Allogeneic sera drawn from patients in remission exerted little or no inhibitory effect, while that obtained in relapse was again more inhibitory. The observed effect was not due to cytotoxic antibodies, nor due to natural iso-antibodies, but is thought to be a phenomenon closely connected with the active phase of malignant diseases. The exact nature of the agent is still far from being clarified at present. 相似文献
82.
83.
84.
85.
Reversal of renovascular hypertension by antibodies specific for angiotensin-converting enzyme.
下载免费PDF全文
![点击此处可从《Proceedings of the National Academy of Sciences of the United States of America》网站下载免费的PDF全文](/ch/ext_images/free.gif)
R A Markle E H Sonnenblick J M Conroy R L Soffer 《Proceedings of the National Academy of Sciences of the United States of America》1978,75(11):5702-5705
Goat antibodies developed against pure rabbit pulmonary angiotensin-converting enzyme (peptidyl dipeptidase, EC 3.4.15.1) were administered intravenously to rats with two-kidney Goldblatt hypertension and to normotensive animals. In the hypertensive model these antibodies were associated with a sustained, immune-dependent decrease of blood pressure to normal values. A smaller, but also immune-specific, reduction of blood pressure was observed in the normotensive group. The data suggest that heterologous antibody directed against angiotensin-converting enzyme may provide a biologically specific probe for examining the contribution of the renin-angiotensin system to normal and pathologic circulatory states. 相似文献
86.
Summary Subpial and subependymal gliosis with abundant Rosenthal fiber (RF) formation are described in two patients. In one, the process appeared as a narrow band over the entire neuraxis and was not accompanied by neurologic manifestations. In the other, the changes were mostly restricted to the lower medulla and upper cervical cord and displayed invasive features. The glial proliferation with RF in the second patient was associated with an inflammatory component, dense collagen deposition, perivascular Schwannosis and demyelination. Involvement of some of the medullary nuclei and their tracts may explain the patient's vague bulbar symptomatology. The underlying cause which led to astrocytic proliferation with excessive RF in these two patients remains elusive. Possible factors contributing to this phenomenon are discussed in the context of Alexander's disease.This work is supported in part by grant NS-07098 相似文献
87.
88.
89.
Tali Siegal Joshua Shorr Isabelle Lubetzki-Korn Dov Soffer Elizabeth Naparstek Ron Tur-Kaspa Oded Abramsky 《Annals of neurology》1981,10(3):271-273
Two patients had centrl nervous system involvement from plasma cell tumor, onr with leptomeningeal infiltraion and the other with solitary intracranial plasmacytoma. In both, cerebrospinal fluid (CSF) electrophoresis revealed IgG index consistent with local synthesi of the myeloma protein. the CSF findings were helpful in the diagnosis and evaluation of tumor recurrence. 相似文献
90.
Epidemiology of Guillain-Barré syndrome 总被引:1,自引:0,他引:1
From 1969 through 1972, a nationwide search for cases of Guillain-Barré syndrome (GBS) is Israel revealed 89 patients. The average annual age-adjusted incidence was 0.75 per 10(5) persons. Overall incidence of the syndrome was similar in Jewish groups of diverse ethnic backgrounds. Arabs had a lower overall incidence than Jews (0.46 per 10(5) persons), perhaps attributable to fewer Arabs at risk in older age groups. Peaks of incidence occurred among individuals over 60 and under 4 years of age when all cases were combined. No clear seasonal or geographic clustering of GBS was evident in Israel during the 4 years of this study. The incidence of GBS in the present study agrees with previous population-based estimates. 相似文献