全文获取类型
收费全文 | 174176篇 |
免费 | 10527篇 |
国内免费 | 432篇 |
专业分类
耳鼻咽喉 | 2273篇 |
儿科学 | 5604篇 |
妇产科学 | 3641篇 |
基础医学 | 23664篇 |
口腔科学 | 7869篇 |
临床医学 | 12794篇 |
内科学 | 39148篇 |
皮肤病学 | 4432篇 |
神经病学 | 14520篇 |
特种医学 | 5520篇 |
外国民族医学 | 26篇 |
外科学 | 21501篇 |
综合类 | 1405篇 |
现状与发展 | 1篇 |
一般理论 | 62篇 |
预防医学 | 18118篇 |
眼科学 | 3240篇 |
药学 | 10679篇 |
中国医学 | 732篇 |
肿瘤学 | 9906篇 |
出版年
2023年 | 846篇 |
2022年 | 1682篇 |
2021年 | 3742篇 |
2020年 | 2524篇 |
2019年 | 3552篇 |
2018年 | 4971篇 |
2017年 | 3719篇 |
2016年 | 3478篇 |
2015年 | 4082篇 |
2014年 | 5604篇 |
2013年 | 7057篇 |
2012年 | 10965篇 |
2011年 | 11502篇 |
2010年 | 5817篇 |
2009年 | 5242篇 |
2008年 | 8890篇 |
2007年 | 9499篇 |
2006年 | 8772篇 |
2005年 | 9041篇 |
2004年 | 8485篇 |
2003年 | 7760篇 |
2002年 | 5801篇 |
2001年 | 5059篇 |
2000年 | 5045篇 |
1999年 | 4435篇 |
1998年 | 1572篇 |
1997年 | 1311篇 |
1996年 | 1302篇 |
1995年 | 1090篇 |
1994年 | 1091篇 |
1993年 | 991篇 |
1992年 | 2674篇 |
1991年 | 2610篇 |
1990年 | 2373篇 |
1989年 | 2370篇 |
1988年 | 2135篇 |
1987年 | 1984篇 |
1986年 | 1860篇 |
1985年 | 1780篇 |
1984年 | 1279篇 |
1983年 | 1037篇 |
1982年 | 582篇 |
1981年 | 529篇 |
1980年 | 511篇 |
1979年 | 936篇 |
1978年 | 613篇 |
1977年 | 482篇 |
1975年 | 549篇 |
1974年 | 543篇 |
1973年 | 551篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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
52.
53.
Diego Dias da Silva Ana Helena da Rosa Paz Ciro Paz Portinho Elizabeth Obino Cirne Lima Lúcia Maria Kliemann Marcus Vinicius Martins Collares 《Acta cirúrgica brasileira / Sociedade Brasileira para Desenvolvimento Pesquisa em Cirurgia》2020,35(12)
Purpose:This study assessed the regeneration potential of mesenchymal stem cells (MSC) from adipose tissue associated with platelet-rich plasma (PRP) in bone regeneration.Methods:Thirty Wistar rats (Rattus norvegicus albinos) were divided into five groups (according to the grafting material and time to euthanasia): (1) autograft - 14 days (control), (2) autograft - 28 days (control), (3) MSC + PRP - 14 days, (4) MSC + PRP + papaverine - 14 days and (5) MSC + PRP + papaverine - 28 days. After euthanasia, the graft was removed and histological slides were prepared. They were assessed by a blinded pathologist using a previously published histological scale as parameter.Results:There was some degree of neoformed bone trabeculae (NBT) in 93.3% of the samples, as well as osteoblastic activity (OA). The autograft groups (14 and 28 days) had higher levels in the formation of bone trabeculae. Nonparametric data were analyzed using the Wilcoxon-Mann-Whitney test and proved not to be statistically significant at p < 0.05.Conclusions:Experimental parietal bone reconstruction, combining MSC, PRP and papaverine presented regeneration in all groups with no significant difference among them.Key words: Bone Regeneration, Platelet-Rich Plasma, Tissue Engineering, Rats 相似文献
54.
55.
Camila Padilha Barbosa Rosalie Barreto Belian Cláudia Marina Tavares de Araújo 《Jornal de pediatria》2021,97(1):80-87
ObjectiveTo present, the process of development and evaluation of an educational software on the Child Health Handbook proposed for the continuing education of primary care nurses and physicians.MethodsQuantitative study of methodological development. For software development, the following steps were followed: definition of objectives; determination of the target audience; choice of pedagogical and theoretical reference for content; content selection and structuring; software development and evaluation by experts (five nurses and four physicians). All responded to an instrument that included four domains: pedagogical; content; functionality; system presentation and usability. The evaluation criteria were arranged on a Likert-type scale. The percentage of agreement and Content Validity Index were used for the quantitative analysis of the degree of agreement, considering a Content Validity Index cutoff point equal to 0.80.ResultsThe overall agreement index, calculated by the arithmetic mean of the Contents Validity Index of the evaluated domains, was 0.96, with scores ranging from 0.90 to 1.00. The average percentage of agreement of the experts per domain was 92.86%, with lower agreement in the content (80.95%), presentation, and usability (90.48%) domains. 100% of percentage of agreement was observed in the pedagogical and functionality domains among the evaluated specialists.ConclusionThe percentage of agreement, Content Validity Index and overall agreement index of the Child Health Handbook educational software in the context of primary care disclosed the software adequacy as an educational resource for continuing education of primary care nurses and physicians. Considering the assessed dimensions, it can also be used by other health professionals and undergraduate students. 相似文献
56.
57.
58.
59.
60.
John Lennon Silva Cunha Amanda Almeida Leite Thamiris de Castro Abrantes Lorena Passoni Vervloet Thayn Melo de Lima Morais Gerson de Oliveira Paiva Neto Tatiana Nayara Librio Kimura Snia Maria Soares Ferreira Ricardo Luiz Cavalcanti de Albuquerque‐Júnior Aline Corrêa Abraho Mario Jos Romaach Bruno Augusto Benevenuto de Andrade Oslei Paes de Almeida Ciro Dantas Soares 《Journal of cutaneous pathology》2021,48(1):24-33