全文获取类型
收费全文 | 1770篇 |
免费 | 118篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 125篇 |
儿科学 | 51篇 |
妇产科学 | 23篇 |
基础医学 | 212篇 |
口腔科学 | 119篇 |
临床医学 | 129篇 |
内科学 | 426篇 |
皮肤病学 | 26篇 |
神经病学 | 168篇 |
特种医学 | 34篇 |
外科学 | 194篇 |
综合类 | 25篇 |
预防医学 | 83篇 |
眼科学 | 58篇 |
药学 | 116篇 |
中国医学 | 9篇 |
肿瘤学 | 100篇 |
出版年
2023年 | 14篇 |
2022年 | 22篇 |
2021年 | 50篇 |
2020年 | 45篇 |
2019年 | 43篇 |
2018年 | 44篇 |
2017年 | 26篇 |
2016年 | 48篇 |
2015年 | 61篇 |
2014年 | 51篇 |
2013年 | 92篇 |
2012年 | 108篇 |
2011年 | 113篇 |
2010年 | 57篇 |
2009年 | 76篇 |
2008年 | 94篇 |
2007年 | 102篇 |
2006年 | 63篇 |
2005年 | 81篇 |
2004年 | 81篇 |
2003年 | 80篇 |
2002年 | 69篇 |
2001年 | 52篇 |
2000年 | 48篇 |
1999年 | 51篇 |
1998年 | 20篇 |
1997年 | 13篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1994年 | 5篇 |
1993年 | 3篇 |
1992年 | 30篇 |
1991年 | 26篇 |
1990年 | 29篇 |
1989年 | 28篇 |
1988年 | 19篇 |
1987年 | 18篇 |
1986年 | 25篇 |
1985年 | 23篇 |
1984年 | 13篇 |
1983年 | 14篇 |
1982年 | 4篇 |
1980年 | 6篇 |
1979年 | 6篇 |
1978年 | 3篇 |
1974年 | 3篇 |
1973年 | 5篇 |
1972年 | 2篇 |
1969年 | 2篇 |
1968年 | 7篇 |
排序方式: 共有1898条查询结果,搜索用时 15 毫秒
1.
Pregnancy can be complicated with different surgical emergencies which may potentially endanger the mother as well as foetus. In the modern era of advanced diagnostics and treatments, neither of them in response to a surgical emergency in a pregnant woman should be delayed. Appropriate early intervention is essential to decrease the morbidity and mortality. Following article encompasses common surgical emergencies that can arise in a pregnant woman and tries to suggest the approach that may be taken to reduce the burden of morbidity and mortality. 相似文献
2.
3.
4.
5.
I. Udroiu A. Sgura L. Vignoli M.A. Bologna M. D'Amen D. Salvi A. Ruzza A. Antoccia C. Tanzarella 《Environmental and molecular mutagenesis》2015,56(4):412-417
The amphibian micronucleus test has been widely used during the last 30 years to test the genotoxic properties of several chemicals and as a tool for ecogenotoxic monitoring. The vast majority of these studies were performed on peripheral blood of urodelan larvae and anuran tadpoles and to a lesser extent adults were also used. In this study, we developed protocols for measuring micronuclei in adult shed skin cells and larval gill cells of the Italian crested newt (Triturus carnifex). Amphibians were collected from ponds in two protected areas in Italy that differed in their radon content. Twenty‐three adult newts and 31 larvae were captured from the radon‐rich pond, while 20 adults and 27 larvae were taken from the radon‐free site. The animals were brought to the laboratory and the micronucleus test was performed on peripheral blood and shed skins taken from the adults and on larval gills. Samples from the radon‐rich site showed micronucleus frequencies higher than those from the radon‐free site and the difference was statistically significant in gill cells (P < 0.00001). Moreover, the larval gills seem to be more sensitive than the adult tissues. This method represents an easy (and noninvasive in the case of the shed skin) application of the micronucleus assay that can be useful for environmental studies in situ. Environ. Mol. Mutagen. 56:412–417, 2015. © 2014 Wiley Periodicals, Inc. 相似文献
6.
K Samanta B Pal 《International journal for vitamin and nutrition research. Internationale Zeitschrift für Vitamin- und Ern?hrungsforschung. Journal international de vitaminologie et de nutrition》1986,56(1):105-108
Supplementation of the diet of adult male rats with 4,000 ppm zinc as ZnSO4 for 30 to 32 days increased the zinc content in the testis and sperm by 25 and 18 per cent respectively, but did not change the same in accessory reproductive tissues, e.g. epididymis, seminal vesicle and prostate. The incidence of conception from mating between normal females and zinc fed males was lower as compared to mating between normal females and control males. This observation indicated reduced fertility of the males resulting from additional zinc ingestion. Motility of the sperm collected from the epididymis (tail) of the zinc treated rats was found to be inhibited. It has been suggested that excess zinc in the sperm was responsible for their poor motility and hence a reduced fertilising capacity. 相似文献
7.
Enza-Maria Valente Anjum Misbahuddin Francesco Brancati Mark R Placzek Barbara Garavaglia Sergio Salvi Andrea Nemeth Charles Shaw-Smith Nardo Nardocci Anna-Rita Bentivoglio Alfredo Berardelli Roberto Eleopra Bruno Dallapiccola Thomas T Warner 《Movement disorders》2003,18(9):1047-1051
The epsilon-sarcoglycan gene (SGCE) on human chromosome 7q21 has been reported to be a major locus for inherited myoclonus-dystonia. Linkage to the SGCE locus has been detected in the majority of families tested, and mutations in the coding region have been found recently in families with autosomal dominant myoclonus-dystonia. To evaluate the relevance of SGCE in myoclonus-dystonia, we sequenced the entire coding region of the epsilon-sarcoglycan gene in 16 patients with either sporadic or familial myoclonus-dystonia. No mutations were found. This study suggests that epsilon-sarcoglycan does not play an important role in sporadic myoclonus-dystonia and supports genetic heterogeneity in familial cases. 相似文献
8.
9.
10.