全文获取类型
收费全文 | 2785篇 |
免费 | 135篇 |
国内免费 | 100篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 217篇 |
妇产科学 | 41篇 |
基础医学 | 309篇 |
口腔科学 | 73篇 |
临床医学 | 360篇 |
内科学 | 479篇 |
皮肤病学 | 121篇 |
神经病学 | 186篇 |
特种医学 | 162篇 |
外科学 | 278篇 |
综合类 | 74篇 |
预防医学 | 163篇 |
眼科学 | 194篇 |
药学 | 193篇 |
中国医学 | 4篇 |
肿瘤学 | 154篇 |
出版年
2023年 | 12篇 |
2021年 | 27篇 |
2020年 | 27篇 |
2019年 | 35篇 |
2018年 | 45篇 |
2017年 | 33篇 |
2016年 | 41篇 |
2015年 | 49篇 |
2014年 | 69篇 |
2013年 | 101篇 |
2012年 | 116篇 |
2011年 | 155篇 |
2010年 | 85篇 |
2009年 | 87篇 |
2008年 | 123篇 |
2007年 | 179篇 |
2006年 | 157篇 |
2005年 | 165篇 |
2004年 | 122篇 |
2003年 | 127篇 |
2002年 | 113篇 |
2001年 | 59篇 |
2000年 | 46篇 |
1999年 | 48篇 |
1998年 | 54篇 |
1997年 | 63篇 |
1996年 | 43篇 |
1995年 | 52篇 |
1994年 | 47篇 |
1993年 | 37篇 |
1992年 | 39篇 |
1991年 | 23篇 |
1990年 | 38篇 |
1989年 | 50篇 |
1988年 | 31篇 |
1987年 | 30篇 |
1986年 | 22篇 |
1985年 | 22篇 |
1984年 | 13篇 |
1983年 | 23篇 |
1982年 | 23篇 |
1981年 | 17篇 |
1979年 | 15篇 |
1976年 | 14篇 |
1966年 | 11篇 |
1965年 | 13篇 |
1963年 | 13篇 |
1959年 | 13篇 |
1956年 | 11篇 |
1955年 | 13篇 |
排序方式: 共有3020条查询结果,搜索用时 15 毫秒
1.
Bührer Christoph Ensenauer Regina Jochum Frank Kalhoff Hermann Körner Antje Koletzko Berthold Lawrenz Burkhard Mihatsch Walter Rudloff Silvia Zimmer Klaus-Peter 《Monatsschrift für Kinderheilkunde》2020,168(9):834-841
Monatsschrift Kinderheilkunde - Eine adäquate Energie- und Nährstoffversorgung ist Grundlage für ein gesundes Wachstum und Voraussetzung für die Erhaltung von Gesundheit und... 相似文献
2.
3.
Peak weight velocity in infancy is negatively associated with lung function in adolescence 下载免费PDF全文
4.
Effects of Deletion of ERα in Osteoblast‐Lineage Cells on Bone Mass and Adaptation to Mechanical Loading Differ in Female and Male Mice 下载免费PDF全文
Katherine M Melville Natalie H Kelly Gina Surita Daniel B Buchalter John C Schimenti Russell P Main F Patrick Ross Marjolein CH van der Meulen 《Journal of bone and mineral research》2015,30(8):1468-1480
Estrogen receptor alpha (ERα) has been implicated in bone's response to mechanical loading in both males and females. ERα in osteoblast lineage cells is important for determining bone mass, but results depend on animal sex and the cellular stage at which ERα is deleted. We demonstrated previously that when ERα is deleted from mature osteoblasts and osteocytes in mixed‐background female mice, bone mass and strength are decreased. However, few studies exist examining the skeletal response to loading in bone cell–specific ERαKO mice. Therefore, we crossed ERα floxed (ERαfl/fl) and osteocalcin‐Cre (OC‐Cre) mice to generate animals lacking ERα in mature osteoblasts and osteocytes (pOC‐ERαKO) and littermate controls (LC). At 10 weeks of age, the left tibia was loaded in vivo for 2 weeks. We analyzed bone mass through micro‐CT, bone formation rate by dynamic histomorphometry, bone strength from mechanical testing, and osteoblast and osteoclast activity by serum chemistry and immunohistochemistry. ERα in mature osteoblasts differentially regulated bone mass in males and females. Compared with LC, female pOC‐ERαKO mice had decreased cortical and cancellous bone mass, whereas male pOC‐ERαKO mice had equal or greater bone mass than LC. Bone mass results correlated with decreased compressive strength in pOC‐ERαKO female L5 vertebrae and with increased maximum moment in pOC‐ERαKO male femora. Female pOC‐ERαKO mice responded more to mechanical loading, whereas the response of pOC‐ERαKO male animals was similar to their littermate controls. © 2015 American Society for Bone and Mineral Research. © 2015 American Society for Bone and Mineral Research. 相似文献
5.
Establishing Biomechanical Mechanisms in Mouse Models: Practical Guidelines for Systematically Evaluating Phenotypic Changes in the Diaphyses of Long Bones 下载免费PDF全文
6.
Trauma und Berufskrankheit - Frakturen der Mittelhandknochen verlaufen nicht selten komplikationsbehaftet und zeigen einen durch Delayed Union oder Pseudarthrosenbildung verzögerten... 相似文献
7.
8.
This study was designed to identify reasons underrepresented minority (URM) dental students select a dental school and to determine the factors that contribute to their resolve to complete their programs. A survey questionnaire developed from interviews with URM students was sent to Minority/Admissions Officers or deans of dental schools that enrolled URM students for distribution to their minority students. A total of 198 questionnaires were received from minority students in all levels of dental school. The results were that 74 percent said they selected a school for its reputation, and 49.5 percent chose a dental school even if the financial aid package was less than what was offered in other schools. African American, Hispanic, and Native American students prefer integrated interview days with nonminority applicants and disapprove of "special" days designated for URMs. The presence of other minority students was not an important factor in the selection of a school but is an important source of support while attending dental school. Dental school minority alumni also play a significant role in the selection of a school. Results of the study can be useful in planning recruitment and retention programs. 相似文献
9.
Electron immunoperoxidase stainings in sections of unfixed pure cultures of Streptococcus mutans 总被引:1,自引:0,他引:1
Unfixed as well as glutaraldehyde-fixed pelleted cells from pure cultures of Streptococcus mutans subspecies sobrinus (B13) were embedded in glycolmethacrylate. Ultrathin were sections immunoperoxidase labelled with rabbit anti-S. mutans sobrinus gamma-globulin. It was found that unfixed specimens became labelled as precisely and as distinctly as did the fixed specimens. All controls were negative. 相似文献
10.
The growth of dental plaque on different materials 总被引:1,自引:0,他引:1
C H Berthold P Berthold P O S?der 《Svensk tandl?kare tidskrift. Swedish dental journal》1971,64(12):863-877