全文获取类型
收费全文 | 1404篇 |
免费 | 100篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 24篇 |
妇产科学 | 19篇 |
基础医学 | 199篇 |
口腔科学 | 9篇 |
临床医学 | 171篇 |
内科学 | 175篇 |
皮肤病学 | 45篇 |
神经病学 | 538篇 |
特种医学 | 24篇 |
外科学 | 75篇 |
综合类 | 9篇 |
一般理论 | 4篇 |
预防医学 | 109篇 |
眼科学 | 9篇 |
药学 | 58篇 |
肿瘤学 | 27篇 |
出版年
2023年 | 8篇 |
2022年 | 10篇 |
2021年 | 16篇 |
2020年 | 19篇 |
2019年 | 31篇 |
2018年 | 28篇 |
2017年 | 25篇 |
2016年 | 30篇 |
2015年 | 34篇 |
2014年 | 25篇 |
2013年 | 54篇 |
2012年 | 47篇 |
2011年 | 77篇 |
2010年 | 39篇 |
2009年 | 37篇 |
2008年 | 68篇 |
2007年 | 97篇 |
2006年 | 79篇 |
2005年 | 70篇 |
2004年 | 83篇 |
2003年 | 76篇 |
2002年 | 78篇 |
2001年 | 37篇 |
2000年 | 52篇 |
1999年 | 47篇 |
1998年 | 32篇 |
1997年 | 16篇 |
1996年 | 18篇 |
1995年 | 13篇 |
1994年 | 17篇 |
1993年 | 12篇 |
1992年 | 17篇 |
1991年 | 16篇 |
1990年 | 15篇 |
1989年 | 24篇 |
1988年 | 7篇 |
1987年 | 15篇 |
1985年 | 8篇 |
1984年 | 11篇 |
1983年 | 10篇 |
1982年 | 14篇 |
1981年 | 12篇 |
1980年 | 6篇 |
1979年 | 6篇 |
1978年 | 4篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 6篇 |
1967年 | 5篇 |
1966年 | 8篇 |
排序方式: 共有1504条查询结果,搜索用时 15 毫秒
1.
Dongbing Lai Emma C. Johnson Sarah Colbert Gayathri Pandey Grace Chan Lance Bauer Meredith W. Francis Victor Hesselbrock Chella Kamarajan John Kramer Weipeng Kuang Sally Kuo Samuel Kuperman Yunlong Liu Vivia McCutcheon Zhiping Pang Martin H. Plawecki Marc Schuckit Jay Tischfield Leah Wetherill Yong Zang Howard J. Edenberg Bernice Porjesz Arpana Agrawal Tatiana Foroud 《Alcoholism, clinical and experimental research》2022,46(3):374-383
2.
PNPLA3 gene polymorphism and response to lifestyle modification in patients with nonalcoholic fatty liver disease
下载免费PDF全文
![点击此处可从《Journal of gastroenterology and hepatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
3.
C. G. Bien C. E. Elger Y. Leitner M. Gomori B. Ran H. Urbach B. Wilken I. Korn-Lubetzki 《European journal of neurology》2007,14(4):387-390
Five young children developed slowly progressive hemiparesis as the initial manifestation of Rasmussen encephalitis (RE). Three have remained seizure free over an observational period of 1.3–1.9 years. In the remaining two patients, seizures occurred after 0.5 and 0.6 years respectively. We suggest that RE might be presently underdiagnosed and should be suspected in cases of new onset hemiparesis. In this series, three out of five patients showed oligoclonal bands on examination of cerebrospinal fluid (CSF) which represented additional diagnostic hints towards an immune-mediated condition. According to recently published formal diagnostic criteria, evidence of progressive cerebral hemiatrophy or bioptic identification of RE-typical inflammation confirms the diagnosis in such cases. Long-term immunotherapy is recommended in order to prevent further tissue loss and functional decline. 相似文献
4.
Selenium content and glutathione peroxidase activity in the testis of the maturing rat 总被引:2,自引:0,他引:2
In rats fed a diet with 0.25 mg Se/kg the testis selenium content rose during maturation. The value in 4-mo-old animals (7.0 mg Se/kg dry mass; 0.9 mg Se/kg wet mass) was six times higher than that in 20-d-old weanling rats. By comparison, the selenium content in the main selenium pools, muscle and liver, remained unchanged and rose by half, respectively. Due to the increased selenium requirement of the testis during its pubertal maturation the amount of selenium taken up by the male gonads was 50% of the amount deposited in muscle and liver, whereas before and after that period it was about 10%. Feeding animals a low vitamin E diet had no effect on the rise in testis selenium. Glutathione peroxidase activity was twice as high in 4-mo-old animals as in weanling rats. Because only a small percentage of the element in the male gonads was bound to the enzyme, the rise in testis selenium must have been due to other selenium compounds. The selenium content of the spermatozoa was about 21 mg Se/kg dry mass, which by far exceeded the level of this element in other compartments of the rat. The increase in testis selenium content coincided with the beginning of spermatogenesis, and it may therefore ensure the supply of adequate amounts of the element for the spermatozoa. 相似文献
5.
Thomas Grunwald Manila Vannucci Nico Pezer Martin Kurthen Johannes Schramm Christian E Elger 《Clinical EEG and neuroscience》2007,38(3):143-147
Eye contact is a powerful social stimulus for human and non-human primates. However, it is unclear whether brain mechanisms that interpret eye contact are sensitive to gender. Here we show that human brain responses to eye contact are indeed gender specific. Recording event-related potentials directly from the medial temporal lobes, we found that eye contact elicited specific responses in men only when they saw female faces. Conversely, women responded specifically to eye contact only when they saw pictures of men. Thus, the human medial temporal lobes subserve specifically the processing of eye contact with persons of the opposite gender. 相似文献
6.
P-fimbriae vaccines 总被引:3,自引:0,他引:3
M. Bernice Kaack Auli Pere Timo K. Korhonen Stefan B. Svenson James A. Roberts 《Pediatric nephrology (Berlin, Germany)》1989,3(4):386-390
To test for cross-protective capacity of two different P-fimbriae vaccines we vaccinated baboons with fimbriae purified from either Escherichia coli strain ER2 or strain JR1. The vaccinated animals showed elevated antibody titers to P-fimbriae from each of the E. coli strains used, suggesting cross-reactivity as was expected from the results of immunoprecipitation of the fimbriae. Enzyme-linked immunosorbent assay inhibition by heterologous P-fimbriae proved this to be true immunologic cross-reactivity. 相似文献
7.
8.
Bernice C. Yates 《Research in nursing & health》1995,18(3):193-203
To determine the extent to which social support from the spouse and a health care provider (HCP) is associated with short- and long-term recovery outcomes in individuals after a cardiac illness, 93 patients were interviewed 2 months (short-term) after their event; 73 (78%) subjects responded to a follow-up questionnaire 1 year later (long-term). Tangible aid from the spouse was associated with better short-term psychological recovery. Satisfaction with and more emotional support from the spouse were associated with better short- and long-term psychological recovery outcomes. Greater satisfaction with HCP support was associated with patients' short- and long-term physical recoveries. These results highlight the value of different sources and types of support as having differential effects on physical and psychological recovery outcomes. ©1995 John Wiley & Sons, Inc. 相似文献
9.
OBJECTIVE: To test whether increasing synchronization of neuronal activity might be causally related to seizure termination. METHODS: Neuronal synchronization was assessed by the relative changes of the eigenvalue spectrum of the equal-time correlation matrix computed from a short window sliding along multi-channel EEGs, recorded with either intracranial or surface electrodes. RESULTS: Synchronization dynamics of six status epilepticus EEG recordings from six patients were assessed. In all six recordings EEG synchronization fluctuated around relatively low levels during ongoing epileptiform activity. Synchronization only persistently increased before, or in one case, at the end of status epilepticus. Ongoing seizure activity stopped without pharmacological intervention in one patient. In four of the five other cases, the persistent increase of synchronization followed administration of anticonvulsant drugs. CONCLUSIONS: Our findings support the hypothesis that increasing synchronization of neuronal activity may be considered as an emergent self-regulatory mechanism for seizure termination. SIGNIFICANCE: The traditional concept is challenged that increasing neuronal synchronization during epileptic seizures is always pathological and should be suppressed. On the contrary, our findings imply that therapeutic interventions to increase synchronization during seizures might be beneficial. 相似文献
10.
Martin J. Lohse Bernice Elger Jutta Lindenborn-Fotinos Karl-Norbert Klotz Ulrich Schwabe 《Naunyn-Schmiedeberg's archives of pharmacology》1988,337(1):64-68
Summary Human platelet membranes were solubilized with the zwitterionic detergent CHAPS (3-[3-(cholamidopropyl)dimethylammonio]-1-propanesulfonate) and the solubilized extract subjected to gel filtration. Binding of the adenosine receptor agonist [3H]NECA (5-N-ethylcarboxamidoadeno-sine) was measured to the eluted fractions. Two [3H]NECA binding peaks were eluted, the first of them with the void volume. This first peak represented between 10% and 25% of the [3H]NECA binding activity eluted from the column. It bound [3H]NECA in a reversible, saturable and GTP-dependent manner with an affinity of 46 nmol/1 and a binding capacity of 510 fmol/mg protein. Various adenosine receptor ligands competed for the binding of [3H]NECA to the first peak with a pharmacological profile characteristic for the A2 adenosine receptor as determined from adenylate cyclase experiments. In contrast, most adenosine receptor ligands did not compete for [3H]NECA binding to the second, major peak. These results suggest that a solubilized A2 receptor-GS protein complex of human platelets can be separated from other [3H]NECA binding sites by gel filtration. This allows reliable radioligand binding studies of the A2 adenosine receptor of human platelets.Abbreviations CHAPS
3-[3-(cholamidopropyl)dimethylammoniol-l-propanesulfonate
- CIA
2-chloroadenosine
- CPA
N6-cyclopentyladenosine
- DPX
1,3-diethyl-8-phenylxanthine
- NECA
5-N-ethylcarboxamidoadenosine
- PAA
2-phenylaminoadenosine
- PIA
N6-phenyhsopropyladenosine
- XAC
8-{4-[([{(2-aminoethyl)amino}carbonyl}methyl)oxy]phenyl]-1,3-dipropylxanthine
Send offprint requests to M. J. Lohse 相似文献