全文获取类型
收费全文 | 3522篇 |
免费 | 222篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 40篇 |
儿科学 | 86篇 |
妇产科学 | 74篇 |
基础医学 | 446篇 |
口腔科学 | 93篇 |
临床医学 | 259篇 |
内科学 | 902篇 |
皮肤病学 | 67篇 |
神经病学 | 367篇 |
特种医学 | 66篇 |
外科学 | 599篇 |
综合类 | 16篇 |
一般理论 | 4篇 |
预防医学 | 273篇 |
眼科学 | 99篇 |
药学 | 205篇 |
中国医学 | 17篇 |
肿瘤学 | 144篇 |
出版年
2023年 | 34篇 |
2022年 | 26篇 |
2021年 | 143篇 |
2020年 | 67篇 |
2019年 | 141篇 |
2018年 | 139篇 |
2017年 | 83篇 |
2016年 | 93篇 |
2015年 | 123篇 |
2014年 | 152篇 |
2013年 | 168篇 |
2012年 | 301篇 |
2011年 | 276篇 |
2010年 | 160篇 |
2009年 | 146篇 |
2008年 | 247篇 |
2007年 | 273篇 |
2006年 | 221篇 |
2005年 | 192篇 |
2004年 | 174篇 |
2003年 | 140篇 |
2002年 | 112篇 |
2001年 | 36篇 |
2000年 | 39篇 |
1999年 | 32篇 |
1998年 | 19篇 |
1997年 | 19篇 |
1996年 | 16篇 |
1995年 | 18篇 |
1994年 | 12篇 |
1993年 | 9篇 |
1992年 | 24篇 |
1991年 | 27篇 |
1990年 | 15篇 |
1989年 | 10篇 |
1988年 | 8篇 |
1987年 | 9篇 |
1986年 | 8篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1983年 | 5篇 |
1982年 | 6篇 |
1981年 | 6篇 |
1980年 | 2篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1964年 | 1篇 |
1946年 | 1篇 |
1912年 | 1篇 |
1911年 | 1篇 |
排序方式: 共有3757条查询结果,搜索用时 15 毫秒
1.
2.
Rizzo Manglio Miguel Bluthgen Mara Virginia Recondo Gonzalo Naveira Martin Perfetti Aldo Rizzi Florencia Kuzminin Alejandro Faura Victoria Cerini Matas Videla Alejandro Silva Carlos Lupinacci Lorena Minatta Nicols 《International journal of clinical oncology / Japan Society of Clinical Oncology》2021,26(6):1057-1064
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status... 相似文献
3.
Lorena Martin-Morales Sara Manzano Maria Rodrigo-Faus Adrian Vicente-Barrueco Victor Lorca Gonzalo Núñez-Moreno Paloma Bragado Almudena Porras Trinidad Caldes Pilar Garre Alvaro Gutierrez-Uzquiza 《International journal of cancer. Journal international du cancer》2023,152(2):283-297
Matrix metalloproteinase-11 (MMP11) is an enzyme with proteolytic activity against matrix and nonmatrix proteins. Although most MMPs are secreted as inactive proenzymes and are later activated extracellularly, MMP11 is activated intracellularly by furin within the constitutive secretory pathway. It is a key factor in physiological tissue remodeling and its alteration may play an important role in the progression of epithelial malignancies and other diseases. TCGA colon and colorectal adenocarcinoma data showed that upregulation of MMP11 expression correlates with tumorigenesis and malignancy. Here, we provide evidence that a germline variant in the MMP11 gene (NM_005940: c.232C>T; p.(Pro78Ser)), identified by whole exome sequencing, can increase the tumorigenic properties of colorectal cancer (CRC) cells. P78S is located in the prodomain region, which is responsible for blocking MMP11's protease activity. This variant was detected in the proband and all the cancer-affected family members analyzed, while it was not detected in healthy relatives. In silico analyses predict that P78S could have an impact on the activation of the enzyme. Furthermore, our in vitro analyses show that the expression of P78S in HCT116 cells increases tumor cell invasion and proliferation. In summary, our results show that this variant could modify the structure of the MMP11 prodomain, producing a premature or uncontrolled activation of the enzyme that may contribute to an early CRC onset in these patients. The study of this gene in other CRC cases will provide further information about its role in CRC development, which might improve patient treatment in the future. 相似文献
4.
Gonzalo Canche-Escamilla Pamela Colli-Acevedo Rocio Borges-Argaez Patricia Quintana-Owen J. Fernando May-Crespo Mirbella Cáceres-Farfan Jesus Alejandro Yam Puc Pablo Sansores-Peraza Blanca Marina Vera-Ku 《Sustainable Chemistry and Pharmacy》2019
The present work focuses on the use of solid and agricultural residues from Aloe vera crops, as a source of antimicrobial agents and textile dyes. The roots from an A. vera plantation post-harvest were extracted with ethyl acetate, purified and phytochemically characterized to obtain five metabolites: aloesaponarin-I (1), deoxyerythrolaccin (2), lacaic acid D methyl ester (3), aloesaponarin-II (4), and aloesaponol-I (5). Acid hydrolysis of the solid industrial residue gave aloe-emodin (6) as the main product with a good yield. All of the components were tested for the first time against phytopathogenic bacteria strains, and deoxyerythrolaccin and lacaic acid D methyl ester were active against Xanthomonas campestris with MIC values of 46.86 and 93.75 μg/mL, respectively. Aloesaponarin-I and aloe-emodin, the main products, were tested as dyes for polyester fabrics using different mordants and pH bath conditions. The colour of each material was investigated in terms of the CIELAB L*, a* and b* values, and the colour fastness to light and washing was investigated according to the Mexican standard methods (NMX-A-074-INNTEX-2005; NMX-A-105-B02-INNTEX-2010). Aloesaponarin-I dyed polyester bright yellow but the final colour was very sensitive to the pH of the dye bath. Aloe-emodin dyed polyester deep yellow, and the fabrics showed good colour fastness to light and to domestic laundering. This study provides evidence that the phenolic components obtained from agricultural residues of the aloe industry can be useful organic alternatives as antimicrobial agents and textile dyes. 相似文献
5.
6.
7.
Long‐term risk of adult overweight and obesity among achalasia patients who underwent Heller Myotomy
8.
9.
10.