全文获取类型
收费全文 | 5314篇 |
免费 | 291篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 51篇 |
儿科学 | 108篇 |
妇产科学 | 137篇 |
基础医学 | 728篇 |
口腔科学 | 90篇 |
临床医学 | 420篇 |
内科学 | 1141篇 |
皮肤病学 | 119篇 |
神经病学 | 612篇 |
特种医学 | 100篇 |
外科学 | 465篇 |
综合类 | 11篇 |
一般理论 | 1篇 |
预防医学 | 414篇 |
眼科学 | 64篇 |
药学 | 456篇 |
中国医学 | 18篇 |
肿瘤学 | 701篇 |
出版年
2024年 | 11篇 |
2023年 | 44篇 |
2022年 | 114篇 |
2021年 | 179篇 |
2020年 | 118篇 |
2019年 | 138篇 |
2018年 | 150篇 |
2017年 | 132篇 |
2016年 | 136篇 |
2015年 | 171篇 |
2014年 | 206篇 |
2013年 | 255篇 |
2012年 | 466篇 |
2011年 | 379篇 |
2010年 | 216篇 |
2009年 | 186篇 |
2008年 | 333篇 |
2007年 | 344篇 |
2006年 | 362篇 |
2005年 | 363篇 |
2004年 | 328篇 |
2003年 | 299篇 |
2002年 | 254篇 |
2001年 | 32篇 |
2000年 | 23篇 |
1999年 | 33篇 |
1998年 | 48篇 |
1997年 | 32篇 |
1996年 | 38篇 |
1995年 | 38篇 |
1994年 | 28篇 |
1993年 | 27篇 |
1992年 | 15篇 |
1991年 | 17篇 |
1990年 | 5篇 |
1989年 | 8篇 |
1988年 | 14篇 |
1987年 | 8篇 |
1986年 | 9篇 |
1985年 | 5篇 |
1984年 | 10篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1979年 | 7篇 |
1978年 | 8篇 |
1977年 | 3篇 |
1976年 | 5篇 |
1975年 | 3篇 |
1974年 | 6篇 |
排序方式: 共有5636条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
Nicole M. Fava Mariana Sanchez Gabriella Wuyke Stephanie Diez-Morel Vicky Vazquez Gira J. Ravelo Karina Villalba Patria Rojas 《Journal of traumatic stress》2020,33(6):1093-1101
Sexual trauma is a national public health concern due to the alarming rates at which it occurs and decades of research supporting its long-term deleterious effects on health outcomes. We assessed the impact of gender norms and sexual trauma on power within sexual relationships among Latina immigrant farmworkers. At baseline, participants (N = 175) completed a survey examining demographic information, sexual trauma history, and gender norms; a follow-up was administered 6 months later. Past sexual trauma was associated with less power in sexual relationships, r = −.25, p < .001, as was endorsement of traditional Latina gender norms (i.e., marianismo): sexual relationship control, r = −.38, p < .001; sexual decision-making dominance, r = −.21, p = .005. In contrast, egalitarian gender norm endorsement was associated with higher levels of sexual relationship control, r = .37, p < .001, and sexual decision-making dominance, r = .17, p = .023. Gender norms moderated the association between sexual trauma and sexual relationship power. Specifically, women who subscribed more to marianismo and reported sexual trauma had less decision-making dominance in sexual relationships, whereas those with lower ratings of marianismo reported higher levels of decision-making dominance despite sexual trauma, R2 = .03, p = .022. Sexual trauma history coupled with higher ratings of egalitarian gender norms was associated with higher levels of sexual relationship control, DR2 = .02, p = .023. These results highlight the importance of culturally informed research to increase the sexual and overall health of vulnerable populations (e.g., Latina immigrant farmworkers). 相似文献
105.
106.
Mathilde Horn Stephane Potvin Jean-Fran?ois Allaire Gilles C?té Gabriella Gobbi Karim Benkirane Jeanne Vachon Alexandre Dumais 《Revue canadienne de psychiatrie》2014,59(8):441-449
Objective:
Borderline and antisocial personality disorders (PDs) share common clinical features (impulsivity, aggressiveness, substance use disorders [SUDs], and suicidal behaviours) that are greatly overrepresented in prison populations. These disorders have been associated biologically with testosterone and cortisol levels. However, the associations are ambiguous and the subject of controversy, perhaps because these heterogeneous disorders have been addressed as unitary constructs. A consideration of profiles of people, rather than of exclusive diagnoses, might yield clearer relationships.Methods:
In our study, multiple correspondence analysis and cluster analysis were employed to identify subgroups among 545 newly convicted inmates. The groups were then compared in terms of clinical features and biological markers, including levels of cortisol, testosterone, estradiol, progesterone, and sulfoconjugated dehydroepiandrosterone (DHEA-S).Results:
Four clusters with differing psychiatric, criminal, and biological profiles emerged. Clinically, one group had intermediate scores for each of the tested clinical features. Another group comprised people with little comorbidity. Two others displayed severe impulsivity, PD, and SUD. Biologically, cortisol levels were lowest in the last 2 groups and highest in the group with less comorbidity. In keeping with previous findings reported in the literature, testosterone was higher in a younger population with severe psychiatric symptoms. However, some apparently comparable behavioural outcomes were found to be related to distinct biological profiles. No differences were observed for estradiol, progesterone, or DHEA-S levels.Conclusions:
The results not only confirm the importance of biological markers in the study of personality features but also demonstrate the need to consider the role of comorbidities and steroid coregulation. 相似文献107.
Jane E Sarginson JF William Deakin Ian M Anderson Darragh Downey Emma Thomas Rebecca Elliott Gabriella Juhasz 《Neuropsychopharmacology》2014,39(12):2857-2866
There is increasing evidence that genetic factors have a role in differential susceptibility to depression in response to severe or chronic adversity. Studies in animals suggest that nitric oxide (NO) signalling has a key role in depression-like behavioural responses to stress. This study investigated whether genetic variation in the brain-expressed nitric oxide synthase gene NOS1 modifies the relationship between psychosocial stress and current depression score. We recruited a population sample of 1222 individuals who provided DNA and questionnaire data on symptoms and stress. Scores on the List of Life-Threatening Experiences (LTE) questionnaire for the last year and self-rated current financial hardship were used as measures of recent/ongoing psychosocial stress. Twenty SNPs were genotyped. Significant associations between eight NOS1 SNPs, comprising two regional haplotypes, and current depression score were identified that survived correction for multiple testing when current financial hardship was used as the interaction term. A smaller three-SNP haplotypes (rs10507279, rs1004356 and rs3782218) located in a regulatory region of NOS1 showed one of the strongest effects, with the A-C-T haplotype associating with higher depression scores at low adversity levels but lower depression scores at higher adversity levels (p=2.3E-05). These results suggest that NOS1 SNPs interact with exposure to economic and psychosocial stressors to alter individual''s susceptibility to depression. 相似文献
108.
Cytomegalovirus-specific cell-mediated immunity (CMV-CMI) in actively infected healthy immunocompetent hosts has been poorly investigated. Conversely, correlates of maternal protective immunity for the fetus after primary infection in pregnancy continue to be studied. The kinetics and magnitude of CMV-specific CMI in immunocompetent primary CMV-infected adults are described. A literature review on CMV-CMI in primarily infected pregnant women and its correlation to the risk of vertical virus transmission is included. Immunological measurements after infection were performed by enzyme-linked ImmunoSPOT assay enumerating IFN-γ secreting CMV-specific T cells, at a single cell level, upon in vitro stimulation with viral antigens. Simultaneously, serological and virological profiles of infected patients were investigated. Patients displayed mild-to-moderate clinical and laboratory profiles for infection, and all showed positive EliSpot results in the early stage of infection (<20 days after onset). The virus-CMI was strong in the majority of patients (58.8%) in which the lowest CMV-DNAemia levels (<300 copies/mL) were detected. Significantly higher viral loads were observed in patients with weak CMV-CMI at the same time-point post-infection (up to 15,104 copies/mL; p < 0.001). T cell response magnitudes to IE-1 and pp65-UL83 peptides were overlapping and stable over time. In these case series, the early presence of CMV-CMI was probably pivotal in controlling viral replication and led to spontaneous viral clearance. 相似文献
109.
110.