全文获取类型
收费全文 | 19304篇 |
免费 | 1504篇 |
国内免费 | 54篇 |
专业分类
耳鼻咽喉 | 256篇 |
儿科学 | 625篇 |
妇产科学 | 443篇 |
基础医学 | 2795篇 |
口腔科学 | 284篇 |
临床医学 | 1839篇 |
内科学 | 3619篇 |
皮肤病学 | 302篇 |
神经病学 | 2011篇 |
特种医学 | 647篇 |
外科学 | 2601篇 |
综合类 | 605篇 |
现状与发展 | 1篇 |
一般理论 | 28篇 |
预防医学 | 1548篇 |
眼科学 | 544篇 |
药学 | 1317篇 |
中国医学 | 40篇 |
肿瘤学 | 1357篇 |
出版年
2023年 | 100篇 |
2022年 | 246篇 |
2021年 | 399篇 |
2020年 | 232篇 |
2019年 | 361篇 |
2018年 | 431篇 |
2017年 | 274篇 |
2016年 | 371篇 |
2015年 | 421篇 |
2014年 | 520篇 |
2013年 | 829篇 |
2012年 | 1178篇 |
2011年 | 1098篇 |
2010年 | 671篇 |
2009年 | 645篇 |
2008年 | 1033篇 |
2007年 | 1047篇 |
2006年 | 937篇 |
2005年 | 1026篇 |
2004年 | 1038篇 |
2003年 | 960篇 |
2002年 | 872篇 |
2001年 | 346篇 |
2000年 | 348篇 |
1999年 | 331篇 |
1998年 | 218篇 |
1997年 | 161篇 |
1996年 | 167篇 |
1995年 | 170篇 |
1994年 | 121篇 |
1993年 | 151篇 |
1992年 | 240篇 |
1991年 | 218篇 |
1990年 | 232篇 |
1989年 | 229篇 |
1988年 | 211篇 |
1987年 | 191篇 |
1986年 | 197篇 |
1985年 | 217篇 |
1984年 | 172篇 |
1983年 | 137篇 |
1982年 | 150篇 |
1981年 | 151篇 |
1980年 | 128篇 |
1979年 | 114篇 |
1977年 | 97篇 |
1976年 | 117篇 |
1975年 | 101篇 |
1974年 | 131篇 |
1973年 | 95篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Dinesh Rakheja Payal Kapur Mai P. Hoang Lonnie C. Roy Michael J. Bennett 《Medical hypotheses》2005,65(6):681
Mammalian fatty acid synthase (FASE) overexpression has been shown in a number of human malignancies including colonic adenocarcinoma. Since FASE synthesizes only saturated fatty acids, we hypothesized that cancer cells have a greater proportion of long-chain saturated fatty acids. We studied and found an unequivocal increase in saturated C18 fatty acid (stearic acid) in colonic adenocarcinoma compared to adjacent normal colonic mucosa. The increase is even more striking when measured as a ratio of stearic acid to the unsaturated C18 fatty acids (oleic acid and linoleic acid). This change in fatty acid composition of the cancer cells should significantly alter their physical and biological properties. The increase in relative proportion of saturated fatty acids should make the cancer cells more susceptible to cryodamage and measurement of fatty acid composition of cancer cells may help individualize the temperature for cryotherapy. Also, the lipid alterations may affect the structure and functions of lipid rafts, which may enable the cancer cells to affect signaling mechanisms such as those involved in cell growth and apoptosis. Dietary or therapeutic interventions targeting lipid rafts may thus be an option for cancer treatment. 相似文献
3.
4.
5.
6.
Robert N. Page Lee Dittrich Roy King Fouad Boulos David L. Page 《Journal of cutaneous pathology》2009,36(11):1206-1209
Originally described by Rosen in 1983, syringomatous nipple adenoma (SAN) is a tumor of disputed histogenesis, which can be problematic both diagnostically and therapeutically. 1 It is a benign primary tumor of breast epithelium with histology similar to that of the syringoma. In the current case, we describe a 40-year-old female with this lesion occurring within a supernumerary breast. This case represents, to our knowledge, the first such reported case, and represents a significant finding as its presence could lend some confusion as to whether or not this represents a benign primary process of breast or a potentially infiltrative tumor of the skin. 相似文献
7.
8.
Alemtuzumab (CAMPATH 1H) Induction Therapy in Cadaveric Kidney Transplantation—Efficacy and Safety at Five Years 总被引:2,自引:0,他引:2
Christopher J. E. Watson J. Andrew Bradley Peter J. Friend John Firth Craig J. Taylor John R. Bradley Kenneth G. C. Smith Sathia Thiru Neville V. Jamieson Geoff Hale Herman Waldmann Roy Calne 《American journal of transplantation》2005,5(6):1347-1353
Alemtuzumab is a powerful lymphocyte depleting antibody currently being evaluated in solid organ transplantation. This paper describes 5-year results of a single center study of alemtuzumab as induction in renal transplantation. Thirty-three renal transplant recipients received 20 mg alemtuzumab on day 0 and 1, followed by half-dose cyclosporin monotherapy (trough concentration 75-125 ng/mL) from day 3. They were compared in a retrospective contemporaneous-controlled manner with 66 kidney transplant recipients transplanted in the same period and center who received conventional immunosuppression with cyclosporin, azathioprine and prednisolone. In the alemtuzumab group 12% of recipients died compared to 17% in the control group (p = 0.48); likewise graft loss was similar in both groups (21% vs. 26%, respectively, p = 0.58). Incidence of acute rejection was also comparable at 5 years (31.5% vs. 33.6%), although the pattern of rejection was different with 14% patients in the alemtuzumab group experiencing rejection over 1 year post-transplant compared to none in the control group. There was no significant difference between groups in terms of infection or serious adverse events. While acknowledging the limitations of a relatively small single-center study, results suggest that alemtuzumab induction allowed satisfactory long-term patient and graft survival equivalent to that seen with standard triple immunosuppression, while avoiding steroid therapy. 相似文献
9.
F. Hampton Roy MD 《Annals of Ophthalmology》2006,38(1):35-38
A red eye is a cardinal sign of ocular inflammation. Most cases are benign and can be managed by the primary care provider.
The key is recognizing cases requiring ophthalmological consultation by differentiating between ciliary and conjunctival injection.
Ciliary injection indicates inflammation of the cornea, iris, or ciliary body, whereas conjunctival injection mainly affects
the posterior conjunctival blood vessels.
The author has stated that he does not have a significant financial interest or other relationship with any product manufacturer
or provider of services discussed in this article. The author also does not discuss the use of off-label products, which includes
unlabeled, unapproved, or investigative products or devices. 相似文献
10.
Lidong Zhang James E Littlejohn Yu Cui Xiaobo Cao Chander Peddaboina W Roy Smythe 《Molecular cancer》2010,9(1):110