全文获取类型
收费全文 | 573篇 |
免费 | 32篇 |
国内免费 | 70篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 22篇 |
妇产科学 | 4篇 |
基础医学 | 49篇 |
口腔科学 | 51篇 |
临床医学 | 122篇 |
内科学 | 166篇 |
皮肤病学 | 8篇 |
神经病学 | 20篇 |
特种医学 | 21篇 |
外科学 | 55篇 |
综合类 | 25篇 |
一般理论 | 2篇 |
预防医学 | 33篇 |
眼科学 | 1篇 |
药学 | 72篇 |
中国医学 | 1篇 |
肿瘤学 | 22篇 |
出版年
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 5篇 |
2019年 | 10篇 |
2018年 | 7篇 |
2017年 | 9篇 |
2016年 | 10篇 |
2015年 | 13篇 |
2014年 | 18篇 |
2013年 | 10篇 |
2012年 | 18篇 |
2011年 | 31篇 |
2010年 | 27篇 |
2009年 | 18篇 |
2008年 | 22篇 |
2007年 | 56篇 |
2006年 | 24篇 |
2005年 | 34篇 |
2004年 | 28篇 |
2003年 | 34篇 |
2002年 | 26篇 |
2001年 | 33篇 |
2000年 | 23篇 |
1999年 | 21篇 |
1998年 | 13篇 |
1997年 | 17篇 |
1996年 | 20篇 |
1995年 | 13篇 |
1994年 | 12篇 |
1993年 | 10篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 4篇 |
1987年 | 7篇 |
1986年 | 9篇 |
1985年 | 10篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 6篇 |
1981年 | 2篇 |
1979年 | 2篇 |
1978年 | 7篇 |
1973年 | 2篇 |
1972年 | 3篇 |
1971年 | 3篇 |
1968年 | 1篇 |
1966年 | 2篇 |
1965年 | 3篇 |
排序方式: 共有675条查询结果,搜索用时 0 毫秒
1.
2.
YP Zverev J Chisi 《Malawi medical journal : the journal of Medical Association of Malawi》2004,16(1):14-16
Handedness is the most important behavioural asymmetry due to its intimate association with the specialisation of the brain for language. It exists in 3 forms, namely right, left and mixed. Left-handers constitute the biggest minority group in the world and in many aspects they are in a disadvantaged position compared to right-handers. Numerous studies demonstrated association between left-handedness and different health problems ranging from learning disorders to breast cancer and decreased longevity. This paper reviews the relevant literature on the genesis of handedness and connection between handedness and health. Deviations from the “normal” pattern of braininess observed in some left-handers might contribute to developmental, cognitive and some mental disorders. However increased incidence of some of pathological conditions among sinistrals could hardly be explained by the “abnormal” pattern of braininess or by the action of a gene or genes responsible for handedness determination. Review of literature suggests that many of health problems of left-handers develop due to environmental, developmental and other mechanisms related to genesis of handedness. 相似文献
3.
A.M. Vacca-Smith B.C. Van Wuyckhuyse L.A. Tabak W.H. Bowen 《Archives of oral biology》1994,39(12):1063-1069
Experiments sought to determine the nature of the binding of milk proteins to hydroxyapatite (HA) and to saliva-coated hydroxyapatite (sHA), and to determine the effect of milk and casein on the adherence of Streptococcus mutans GS-5 to sHA. The binding of radiolabelled -casein to HA was reduced when incubated simultaneously with parotid saliva, and enhanced in the presence of milk. The binding of β- and κ-casein to HA was unaffected by the presence of parotid saliva and enhanced by the presence of milk. The in vitro bacterial adherence of Strep. mutans GS-5 to sHA beads was reduced when beads were coated with milk instead of buffer, or when bacteria were added to sHA in the presence of milk instead of buffer. Casein proteins (, β, κ) added to sHA simultaneously with bacteria inhibited the adherence of Strep. mutans GS-5 to sHA. κ-Casein, when bound to sHA, inhibited streptococcal adherence to sHA; - and β-casein, when bound to sHA, had no effect on streptococcal adherence. Fractionation of κ-casein by anion-exchange chromatography revealed the anti-adherence activity of κ-casein was mediated primarily by a 40,000 mol. wt. glycoprotein-containing fraction. These data show that milk, particularly κ-casein fractions, can modulate the adherence of Strep. mutans GS-5 to SHA surfaces in vitro. 相似文献
4.
5.
6.
Clinical, electrophysiological and magnetic resonance imaging findings in carpal tunnel syndrome 总被引:1,自引:0,他引:1
Musluoğlu L Celik M Tabak H Forta H 《Electromyography and clinical neurophysiology》2004,44(3):161-165
OBJECTIVE: To assess magnetic resonance imaging (MRI) findings in carpal tunnel syndrome (CTS) and to compare them with electrophysiological findings. METHODS: Routine motor and sensory nerve conduction examinations and needle EMG were performed in 42 hands of 22 patients, who were clinically diagnosed as having CTS in at least one wrist. RESULTS: Of 29 wrists with clinically and electrophysiologically confirmed CTS, MRI could detect abnormality in 18 wrists (62%). Median nerve was found to be abnormal in MRI in 1 of 2 wrists with suspected clinical symptoms and proven CTS by electrophysiological examination. MRI was abnormal in 1 of 4 wrists with normal clinical and electrophysiological examination. MRI was abnormal in 46, 7% of wrists with mild CTS, in 61.6% of moderate CTS and in 100% of severe CTS. Volar bulging of the flexor retinaculum was detected in a single wrist with severe CTS. Enlargement of median nerve was observed in 3 of 5 severe CTS. CONCLUSION: MRI could be useful in the diagnosis of unproven cases in CTS. It also provides anatomical information that correlate well with electrophysiological findings in regard of the severity of median nerve compression. 相似文献
7.
Claudio Gustavo Stefanoff Rocío Hassan Ana Carolina Gonzalez Luiz Ant?nio B Andrade Daniel G Tabak Sérgio Romano Ilana R Zalcberg 《Diagnostic molecular pathology》2003,12(2):79-87
We herein present a technical strategy to optimize DNA isolation from paraffin-embedded tissue (PET). This includes the choice of adequate buffers for proteinase K digestion and multiplex PCR amplifications for assessing the appropriateness of DNA extracts for subsequent PCR assays for detecting clonality. We found that the association of proteinase K digestion in nonionic buffer and subsequent extract dilutions accounted for 79% of successful amplifications. A final efficiency of 88% was achieved by additional organic extractions and/or re-extractions. Comparisons were carried out with control DNA extracts from fresh samples to assess the efficiency of each clonality assay. Immunoglobulin CDRIII rearranged region amplification was more efficient for pregerminal center B-cell lymphomas in contrast to CDRII rearrangement detection, which was more effective for germinal and postgerminal lymphomas. T-cell clonality detection by TCRgamma PCR was less efficient in PET samples than in fresh tissues showing that DNA integrity is more critical for TCR than for IGH amplification. Two inconclusive cases without phenotypic markers and two other atypical lymphoproliferations masked by reactive T cells were diagnosed as plasmablastic lymphomas and as monoclonal B-proliferations, respectively, due to IGH rearrangements. 相似文献
8.
TS RAGHU RAMAN DALJIT SINGH YP JALPOTA PK MENON 《Medical Journal Armed Forces India》1996,52(1):19-22
Of the 253 neonates admitted to a neonate intensive care unit during the period Jan 91 to Sep 93, 43 neonates died. Autopsy was done in 23 of these (53%). The mean duration of stay of the neonates in the intensive care unit prior to death was 5.6 days (range 2 hours to 10 days). Antemortem diagnoses included asphyxia neonatorum (4), meconium aspiration syndrome (2), septicemia (5), prematurity (3), birth trauma (2), congenital anomalies (2), hypoxic ischemic encephalopathy (1), and non-specific diagnosis (4). There were 6 major autopsy findings that, if known prior to death, would have altered clinical management and might have resulted in cure or prolonged survival. There were 8 additional major findings that, if known prior to death, would not have altered management There were 14 minor findings related to major diagnoses but unrelated to the primary cause of death.KEY WORDS: Autopsy, Cause of death, Perinatal mortality 相似文献
9.
10.