全文获取类型
收费全文 | 860篇 |
免费 | 48篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 27篇 |
妇产科学 | 35篇 |
基础医学 | 68篇 |
口腔科学 | 21篇 |
临床医学 | 113篇 |
内科学 | 111篇 |
皮肤病学 | 35篇 |
神经病学 | 97篇 |
特种医学 | 187篇 |
外科学 | 34篇 |
综合类 | 18篇 |
一般理论 | 8篇 |
预防医学 | 95篇 |
药学 | 69篇 |
中国医学 | 1篇 |
肿瘤学 | 25篇 |
出版年
2022年 | 6篇 |
2021年 | 11篇 |
2020年 | 13篇 |
2019年 | 10篇 |
2018年 | 22篇 |
2017年 | 15篇 |
2016年 | 13篇 |
2015年 | 38篇 |
2014年 | 44篇 |
2013年 | 81篇 |
2012年 | 46篇 |
2011年 | 27篇 |
2010年 | 31篇 |
2009年 | 30篇 |
2008年 | 18篇 |
2007年 | 59篇 |
2006年 | 14篇 |
2005年 | 24篇 |
2004年 | 20篇 |
2003年 | 18篇 |
2002年 | 16篇 |
2001年 | 11篇 |
2000年 | 17篇 |
1999年 | 10篇 |
1998年 | 20篇 |
1997年 | 25篇 |
1996年 | 16篇 |
1995年 | 23篇 |
1994年 | 19篇 |
1993年 | 15篇 |
1992年 | 9篇 |
1991年 | 13篇 |
1990年 | 14篇 |
1989年 | 19篇 |
1988年 | 17篇 |
1987年 | 14篇 |
1986年 | 11篇 |
1985年 | 13篇 |
1984年 | 13篇 |
1983年 | 10篇 |
1982年 | 8篇 |
1981年 | 7篇 |
1980年 | 7篇 |
1976年 | 11篇 |
1971年 | 3篇 |
1968年 | 4篇 |
1966年 | 3篇 |
1949年 | 4篇 |
1948年 | 3篇 |
1947年 | 6篇 |
排序方式: 共有956条查询结果,搜索用时 15 毫秒
1.
W J Wijnands J F Trooster P C Teunissen H A Cats T B Vree 《Drug metabolism and disposition》1990,18(6):954-957
The pharmacokinetics of a single iv dose of 10 mg diazepam and the renal excretion of its metabolites resulting from N-demethylation and C-3-hydroxylation were investigated in 10 healthy volunteers when diazepam was administered alone and on day 3 of administration of the fluoroquinolone ciprofloxacin (500 mg twice per day). No significant changes in the diazepam half-life, its volume of distribution, the total body clearance, or the renal clearance were observed. In addition, the renal excretion of the metabolites desmethyldiazepam, 3-hydroxydiazepam (temazepam), and 3-hydroxydesmethyldiazepam (oxazepam) were not altered by ciprofloxacin co-medication. These data demonstrate that in a 500 mg twice per day oral dosage, ciprofloxacin does not influence the metabolic clearance of diazepam in young healthy volunteers. 相似文献
2.
Rechtsanwalt Dr. iur. Matthias Dann LL.M. 《MedR Medizinrecht》2007,25(11):638-643
Ohne Zusammenfassung 相似文献
3.
J. KRØLL 《Scandinavian journal of immunology》1983,17(S10):171-173
4.
J. KRØLL 《Scandinavian journal of immunology》1983,17(S10):165-169
5.
J. KRØLL 《Scandinavian journal of immunology》1983,17(S10):135-139
6.
7.
8.
Mahadevaiah SK; Odorisio T; Elliott DJ; Rattigan A; Szot M; Laval SH; Washburn LL; McCarrey JR; Cattanach BM; Lovell-Badge R; Burgoyne PS 《Human molecular genetics》1998,7(4):715-727
An RNA-binding motif (RBM) gene family has been identified on the human Y
chromosome that maps to the same deletion interval as the 'azoospermia
factor' (AZF). We have identified the homologous gene family (Rbm) on the
mouse Y with a view to investigating the proposal that this gene family
plays a role in spermatogenesis. At least 25 and probably >50 copies of
Rbm are present on the mouse Y chromosome short arm located between Sry and
the centromere. As in the human, a role in spermatogenesis is indicated by
a germ cell-specific pattern of expression in the testis, but there are
distinct differences in the pattern of expression between the two species.
Mice carrying the deletion Yd1, that maps to the proximal Y short arm, are
female due to a position effect resulting in non-expression of Sry ;
sex-reversing such mice with an Sry transgene produces males with a high
incidence of abnormal sperm, making this the third deletion interval on the
mouse Y that affects some aspect of spermatogenesis. Most of the copies of
Rbm map to this deletion interval, and the Yd1males have markedly reduced
Rbm expression, suggesting that RBM deficiency may be responsible for, or
contribute to, the abnormal sperm development. In man, deletion of the
functional copies of RBM is associated with meiotic arrest rather than
sperm anomalies; however, the different effects of deletion are consistent
with the differences in expression between the two species.
相似文献
9.
Interchromosomal duplications of the adrenoleukodystrophy locus: a phenomenon of pericentromeric plasticity 总被引:13,自引:5,他引:13
Eichler EE; Budarf ML; Rocchi M; Deaven LL; Doggett NA; Baldini A; Nelson DL; Mohrenweiser HW 《Human molecular genetics》1997,6(7):991-1002
A 9.7 kb segment encompassing exons 7-10 of the adrenoleukodystrophy (ALD)
locus of the X chromosome has duplicated to specific locations near the
pericentromeric regions of human chromosomes 2p11,10p11, 16p11 and 22q11.
Comparative sequence analysis reveals 92-96% nucleotide identity,
indicating that the autosomal ALD paralogs arose relatively recently during
the course of higher primate evolution (5-10 million years ago). Analysis
of sequences flanking the duplication region identifies the presence of an
unusual GCTTTTTGC repeat which may be a sequence-specific integration site
for the process of pericentromeric- directed transposition. The breakpoint
sequence and phylogenetic analysis predict a two-step transposition model,
in which a duplication from Xq28 to pericentromeric 2p11 occurred once,
followed by a rapid distribution of a larger duplicon cassette among the
pericentromeric regions. In addition to facilitating more effective
mutation detection among ALD patients, these findings provide further
insight into the molecular basis underlying a pericentromeric-directed
mechanism for non- homologous interchromosomal exchange.
相似文献
10.
Marijke S. Labots-Vogelesang Doreth A. M. Teunissen Vivianne Kranenburg Antoine L. M. Lagro-Janssen 《The European journal of general practice》2021,27(1):19
BackgroundGeneral practitioners (GPs) encounter women suffering from premenstrual symptoms. Often women with premenstrual problems experience little understanding from GPs. Views of GPs will influence their approach to these women and their care. Insight into these views is lacking but could help in designing educational programmes for GPs.ObjectivesTo explore the views of Dutch GPs towards aetiology, diagnostic process, and preferred treatment of premenstrual symptoms.MethodsIn 2017, we conducted a qualitative, semi-structured, interview survey among 27 GPs, varying in age, gender, and practice setting.ResultsImportant themes emerged from the interviews: ‘no need for a symptom diary,’ ‘PMS defined as illness’ exclusively in case of disruption of normal functioning, and ‘symptomatic treatment’ as preferred approach. Most GPs considered PMS to be a physiological phenomenon, with taking history as an adequate diagnostic tool. Almost all GPs regarded a normal cyclical hormonal cycle as causal; many also mentioned the combination with personal sensitivity. Some pointed to a dividing line between physiological condition and illness if women could not function normally in daily life. Lastly, the approach GPs preferred was focussing on relieving symptoms of individual patients. In addition to explaining the hormonal cycle and lifestyle advice, all GPs advocated oral contraceptives, and if necessary psychological support. GPs expressed negative feelings about prescribing antidepressants.ConclusionGPs considered physiological changes and personal sensitivity as aetiological factors. We recommend more training to improve GPs knowledge and more insight into the burden of women with PMS. A symptom diary is an essential diagnostic tool for GPs. 相似文献