全文获取类型
收费全文 | 23542篇 |
免费 | 1498篇 |
国内免费 | 101篇 |
专业分类
耳鼻咽喉 | 373篇 |
儿科学 | 395篇 |
妇产科学 | 419篇 |
基础医学 | 3488篇 |
口腔科学 | 1994篇 |
临床医学 | 1920篇 |
内科学 | 5361篇 |
皮肤病学 | 518篇 |
神经病学 | 1774篇 |
特种医学 | 507篇 |
外科学 | 2470篇 |
综合类 | 69篇 |
一般理论 | 11篇 |
预防医学 | 2410篇 |
眼科学 | 358篇 |
药学 | 1876篇 |
中国医学 | 247篇 |
肿瘤学 | 951篇 |
出版年
2023年 | 230篇 |
2022年 | 541篇 |
2021年 | 906篇 |
2020年 | 593篇 |
2019年 | 776篇 |
2018年 | 922篇 |
2017年 | 628篇 |
2016年 | 688篇 |
2015年 | 856篇 |
2014年 | 1132篇 |
2013年 | 1332篇 |
2012年 | 1877篇 |
2011年 | 2207篇 |
2010年 | 1058篇 |
2009年 | 884篇 |
2008年 | 1430篇 |
2007年 | 1457篇 |
2006年 | 1231篇 |
2005年 | 1140篇 |
2004年 | 909篇 |
2003年 | 797篇 |
2002年 | 721篇 |
2001年 | 384篇 |
2000年 | 366篇 |
1999年 | 300篇 |
1998年 | 106篇 |
1997年 | 107篇 |
1996年 | 66篇 |
1995年 | 59篇 |
1994年 | 65篇 |
1993年 | 42篇 |
1992年 | 134篇 |
1991年 | 116篇 |
1990年 | 111篇 |
1989年 | 97篇 |
1988年 | 70篇 |
1987年 | 66篇 |
1986年 | 66篇 |
1985年 | 74篇 |
1984年 | 51篇 |
1983年 | 46篇 |
1982年 | 30篇 |
1980年 | 34篇 |
1979年 | 33篇 |
1978年 | 33篇 |
1975年 | 29篇 |
1973年 | 35篇 |
1971年 | 31篇 |
1970年 | 32篇 |
1966年 | 26篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Dongbing Lai Emma C. Johnson Sarah Colbert Gayathri Pandey Grace Chan Lance Bauer Meredith W. Francis Victor Hesselbrock Chella Kamarajan John Kramer Weipeng Kuang Sally Kuo Samuel Kuperman Yunlong Liu Vivia McCutcheon Zhiping Pang Martin H. Plawecki Marc Schuckit Jay Tischfield Leah Wetherill Yong Zang Howard J. Edenberg Bernice Porjesz Arpana Agrawal Tatiana Foroud 《Alcoholism, clinical and experimental research》2022,46(3):374-383
2.
Hannah Lilly Mackenzie Bitzel Tatiana Pejnovic Joanna Schnell 《Physical Therapy Reviews》2019,24(5):195-207
AbstractBackground: Cerebral palsy (CP) is a common childhood disability. However, these individuals are now living longer lives, participating in adult roles, and seeking healthcare services. The transition from pediatric to adult healthcare for adolescents with CP is a challenging yet significant time. Adolescents experience several barriers during transition.Objectives: To utilize the environmental and personal dimensions of the ICF model in order to explore barriers when transitioning to adulthood as well as discuss characteristics and physical therapy implications needed to succeed within transition.Methods: Electronic searching of PubMed, CINAHL, ERIC, Scopus, ProQuest, and the Cochrane Library databases was concluded on January 9, 2019 for studies including transition between pediatric and adult healthcare in individuals diagnosed with CP. Two independent reviewers agreed upon inclusion, eligibility, and quality assessment of each study using the Mixed-Methods Appraisal Tool (MMAT).Results: Seven studies were included in the systematic review. Results for each study were separated based on the personal and environmental contextual factors of the ICF model and solutions to the barriers were then discussed.Conclusions: Research has provided proposed solutions to select barriers, however, other barriers have yet to be addressed. More research is needed to address these barriers and provide a model program that can be implemented within the healthcare systems to promote a successful transition for adolescents with CP from pediatric to adult services. 相似文献
3.
4.
5.
6.
7.
Iclea Rocha Gama Euclides Marinho Trindade-Filho Suzana Lima Oliveira Nassib Bezerra Bueno Isabelle Tenório Melo Cyro Rego Cabral-Junior Elenita M. Barros Jaqueline A. Galvão Wanessa S. Pereira Raphaela C. Ferreira Bruna R. Domingos Terezinha da Rocha Ataide 《Metabolic brain disease》2015,30(1):93-98
8.
Talita da Silva Mendes de Farias Ariclécio Cunha de Oliveira Sandra Andreotti Fernanda Gaspar do Amaral Patrícia Chimin André Ricardo Alves de Proença Francisco Leonardo Torres Leal Rogério Antonio Laurato Sertié Amanda Baron Campana Andressa Bolsoni Lopes Arnaldo Henrique de Souza José Cipolla‐Neto Fabio Bessa Lima 《Journal of pineal research》2015,58(3):251-261
Melatonin, the main hormone produced by the pineal gland, is secreted in a circadian manner (24‐hr period), and its oscillation influences several circadian biological rhythms, such as the regulation of clock genes expression (chronobiotic effect) and the modulation of several endocrine functions in peripheral tissues. Assuming that the circadian synchronization of clock genes can play a role in the regulation of energy metabolism and it is influenced by melatonin, our study was designed to assess possible alterations as a consequence of melatonin absence on the circadian expression of clock genes in the epididymal adipose tissue of male Wistar rats and the possible metabolic repercussions to this tissue. Our data show that pinealectomy indeed has impacts on molecular events: it abolishes the daily pattern of the expression of Clock, Per2, and Cry1 clock genes and Pparγ expression, significantly increases the amplitude of daily expression of Rev‐erbα, and affects the pattern of and impairs adipokine production, leading to a decrease in leptin levels. However, regarding some metabolic aspects of adipocyte functions, such as its ability to synthesize triacylglycerols from glucose along 24 hr, was not compromised by pinealectomy, although the daily profile of the lipogenic enzymes expression (ATP‐citrate lyase, malic enzyme, fatty acid synthase, and glucose‐6‐phosphate dehydrogenase) was abolished in pinealectomized animals. 相似文献
9.
André Ricardo Adriano Tiago Silveira Lima Maxime Battistella Martine Bagot 《Anais brasileiros de dermatologia》2015,90(6):892-895
Granulomatous slack skin is an indolent T-cell lymphoma, considered to be a
variant of mycosis fungoides. Clinically it is characterized by areas of
redundant skin, wrinkled, inelastic, with variable erythema and
infiltration besides a poikilodermic surface. A differential diagnosis
unknown to most dermatologists is the giant cell tumor of soft tissue,
which is an extremely rare low-grade sarcoma. The authors report a patient
who had undergone extensive surgery because of a primary diagnosis of giant
cell tumor of soft tissue, but which proved to be granulomatous slack skin
after a second interventional procedure with confirmatory
histopathology. 相似文献
10.
Adilson Cunha Ferreira Edward Araujo Júnior Wellington P. Martins João Francisco Jordão Antônio Hélio Oliani Simon E. Meagher 《The journal of maternal-fetal & neonatal medicine》2015,28(14):1706-1710
Objective: To assess the quality of images and video clips of fetal central nervous (CNS) structures obtained by ultrasound and transmitted via tele-ultrasound from Brazil to Australia.Methods: In this cross-sectional study, 15 normal singleton pregnant women between 20 and 26 weeks were selected. Fetal CNS structures were obtained by images and video clips. The exams were transmitted in real-time using a broadband internet and an inexpensive video streaming device. Four blinded examiners evaluated the quality of the exams using the Likert scale. We calculated the mean, standard deviation, mean difference, and p values were obtained from paired t tests.Results: The quality of the original video clips was slightly better than that observed by the transmitted video clips; mean difference considering all observers = 0.23 points. In 47/60 comparisons (78.3%; 95% CI?=?66.4–86.9%) the quality of the video clips were judged to be the same. In 182/240 still images (75.8%; 95% CI?=?70.0–80.8%) the scores of transmitted image were considered the same as the original.Conclusion: We demonstrated that long distance tele-ultrasound transmission of fetal CNS structures using an inexpensive video streaming device provided images of subjective good quality. 相似文献