全文获取类型
收费全文 | 704673篇 |
免费 | 49960篇 |
国内免费 | 1297篇 |
专业分类
耳鼻咽喉 | 9170篇 |
儿科学 | 23267篇 |
妇产科学 | 17599篇 |
基础医学 | 110398篇 |
口腔科学 | 19954篇 |
临床医学 | 63687篇 |
内科学 | 134253篇 |
皮肤病学 | 16160篇 |
神经病学 | 49440篇 |
特种医学 | 25755篇 |
外国民族医学 | 76篇 |
外科学 | 104576篇 |
综合类 | 14814篇 |
现状与发展 | 2篇 |
一般理论 | 160篇 |
预防医学 | 51349篇 |
眼科学 | 16315篇 |
药学 | 53939篇 |
3篇 | |
中国医学 | 2356篇 |
肿瘤学 | 42657篇 |
出版年
2019年 | 5435篇 |
2018年 | 7866篇 |
2017年 | 6111篇 |
2016年 | 6822篇 |
2015年 | 7552篇 |
2014年 | 10276篇 |
2013年 | 15387篇 |
2012年 | 20526篇 |
2011年 | 21509篇 |
2010年 | 12728篇 |
2009年 | 11937篇 |
2008年 | 19999篇 |
2007年 | 21529篇 |
2006年 | 21930篇 |
2005年 | 20462篇 |
2004年 | 20012篇 |
2003年 | 18964篇 |
2002年 | 18472篇 |
2001年 | 36346篇 |
2000年 | 36913篇 |
1999年 | 30381篇 |
1998年 | 7876篇 |
1997年 | 6664篇 |
1996年 | 6973篇 |
1995年 | 6628篇 |
1994年 | 6104篇 |
1993年 | 5593篇 |
1992年 | 22969篇 |
1991年 | 22937篇 |
1990年 | 22319篇 |
1989年 | 22087篇 |
1988年 | 20040篇 |
1987年 | 19428篇 |
1986年 | 18474篇 |
1985年 | 17313篇 |
1984年 | 12702篇 |
1983年 | 10745篇 |
1982年 | 5923篇 |
1979年 | 11521篇 |
1978年 | 8130篇 |
1977年 | 6832篇 |
1976年 | 6597篇 |
1975年 | 7271篇 |
1974年 | 8498篇 |
1973年 | 8146篇 |
1972年 | 7661篇 |
1971年 | 7131篇 |
1970年 | 6878篇 |
1969年 | 6306篇 |
1968年 | 5781篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
971.
G N Hortobagyi D Frye F A Holmes V Hug G Fraschini A U Buzdar 《Cancer treatment reports》1987,71(12):1193-1196
Thirty patients with progressive metastatic breast cancer and one prior chemotherapy regimen were treated with iproplatin at a starting dose of 300 mg/m2 iv every 3 weeks. After the first 11 patients, the starting dose was decreased to 270 mg/m2. There were one complete remission, three partial remissions, and two minor responses. Responses were observed in soft tissue and osseous and visceral areas. Grade 3 nausea and vomiting were observed in 38% of patients, and grade 3 diarrhea occurred in 31%. The dose-limiting toxicity was thrombocytopenia, which required dose de-escalation in 15 patients. No nephrotoxicity, neurotoxicity, or ototoxicity was observed. Iproplatin has modest antitumor activity in this group of previously treated patients with metastatic breast cancer. 相似文献
972.
N. I. L. Wilson 《The Journal of hospital infection》1987,9(3):235-242
The current use of methods, in Scotland, to prevent infection following orthopaedic surgery was established by postal questionnaire. Thirty-five per cent of surgeons used antibiotic cement routinely for total hip replacement. Ultraclean air facilities were provided for only 19%. Ninety-one per cent of surgeons used prophylactic parenteral antibiotics during total hip replacement, 75% in the management of open fractures, but only 12% for metal implants. Most chose an appropriate antibiotic. Only one-third of surgeons used an antibiotic regimen of appropriate duration and timing for total hip replacement or when employing metal implants. 相似文献
973.
974.
The rejection of sponge matrix allografts across H-2 barriers has generally been found to contain specifically sensitized cytotoxic T cells to donor alloantigen. There is one exception: sponge matrix allografts that differ only with respect to class II alloantigens do not contain specifically sensitized cytotoxic T cells. We therefore investigated the capacity of infiltrating cells removed from sponge matrix allografts to generate delayed hypersensitivity reactions after exposure to fresh alloantigen in a footpad assay. Cells infiltrating class I and II allografts were equally capable of eliciting delayed footpad reactions when injected with specific donor alloantigen into the footpads of naive responder strain mice. Allosensitized T-lymphocyte clones of helper or cytotoxic type were also capable of initiating delayed-type hypersensitivity (DTH) reactions in vivo. We conclude that rejecting allografts across class I or II alloantigenic barriers are infiltrated by cells capable of effecting DTH reactions, in addition to their capacity to exert specific helper or specific cytotoxic reactions. The results also support that both helper and cytotoxic T cells can participate in allospecific DTH reactions. 相似文献
975.
976.
977.
Since variations in the electric skin impedance delta R depend on an instantaneous value R, parameters of the cutaneogalvanic reaction should be assessed in the scale of the natural logarithm lnR. Such methodology allows an adequate comparison of results obtained in many patients or in a single patient during a long-term period. 相似文献
978.
979.
980.