全文获取类型
收费全文 | 2138篇 |
免费 | 151篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 42篇 |
妇产科学 | 23篇 |
基础医学 | 319篇 |
口腔科学 | 42篇 |
临床医学 | 273篇 |
内科学 | 406篇 |
皮肤病学 | 22篇 |
神经病学 | 177篇 |
特种医学 | 141篇 |
外国民族医学 | 1篇 |
外科学 | 361篇 |
综合类 | 18篇 |
一般理论 | 3篇 |
预防医学 | 129篇 |
眼科学 | 52篇 |
药学 | 118篇 |
中国医学 | 2篇 |
肿瘤学 | 161篇 |
出版年
2021年 | 20篇 |
2020年 | 17篇 |
2019年 | 21篇 |
2018年 | 28篇 |
2017年 | 37篇 |
2016年 | 30篇 |
2015年 | 32篇 |
2014年 | 44篇 |
2013年 | 65篇 |
2012年 | 81篇 |
2011年 | 93篇 |
2010年 | 60篇 |
2009年 | 54篇 |
2008年 | 67篇 |
2007年 | 65篇 |
2006年 | 71篇 |
2005年 | 83篇 |
2004年 | 51篇 |
2003年 | 69篇 |
2002年 | 61篇 |
2001年 | 78篇 |
2000年 | 63篇 |
1999年 | 61篇 |
1998年 | 33篇 |
1997年 | 36篇 |
1996年 | 30篇 |
1995年 | 26篇 |
1994年 | 31篇 |
1993年 | 31篇 |
1992年 | 52篇 |
1991年 | 53篇 |
1990年 | 64篇 |
1989年 | 55篇 |
1988年 | 58篇 |
1987年 | 43篇 |
1986年 | 47篇 |
1985年 | 57篇 |
1984年 | 46篇 |
1983年 | 53篇 |
1982年 | 30篇 |
1981年 | 25篇 |
1980年 | 30篇 |
1979年 | 37篇 |
1978年 | 15篇 |
1977年 | 14篇 |
1976年 | 14篇 |
1975年 | 25篇 |
1974年 | 26篇 |
1973年 | 17篇 |
1971年 | 14篇 |
排序方式: 共有2302条查询结果,搜索用时 15 毫秒
1.
Ophira Salomon Joseph Moisseiev Tamara Vilganski Rima Dardik Shimon Kurtz Eva Shpringer David M Steinberg Nurit Rosenberg 《Blood coagulation & fibrinolysis》2006,17(6):485-488
To determine whether polymorphisms of platelet surface glycoprotein associated with arterial thrombosis are risk factors for branch retinal vein occlusion. A case-control study in which 69 patients with branch retinal vein occlusion and 147 controls who attended the eye clinic for nonvascular complications participated. DNA was extracted from whole blood and analyzed for genotyping of platelet glycoprotein polymorphisms by polymerase chain reactions and specific restricted enzymes. No relationship was found between the four platelet glycoprotein polymorphisms i.e. GPIa C807T, VNTR and Kozak of glycoprotein Ibalpha, the HPA-1 of glycoprotein IIIa and the occurrence of branch retinal vein occlusion. The HPA-2 polymorphism was found in 18 out 60 (30%) patients with branch retinal vein occlusion in comparison with 27 out 142 (19%) of controls, with an estimated odds ratio of 1.8 (95% confidence interval, 0.91-3.65). The four platelet glycoprotein polymorphisms are not risk factors for branch retinal vein occlusion and therefore it seems unnecessary to screen those patients for it. A larger study is required, however, to determine whether HPA-2 is a novel risk factor for branch retinal vein occlusion. 相似文献
2.
Regulation of erythropoietin production 总被引:6,自引:0,他引:6
3.
4.
Hilde Tobi Paul B. van den Berg Lolkje TW de Jong‐van den Berg 《Pharmacoepidemiology and drug safety》2006,15(3):211-211
The original article to which this Erratum refers was published in Pharmacoepidemiology and Drug Safety 2005; 14: 239–247. 相似文献
5.
6.
7.
Lymphangiomatosis is a rare disorder of the lymphatic system that is known to cause chylothorax. Chyloptysis may occur but chylous bronchial cast formation is rare. A case is reported of lymphangiomatosis in a 34 year old woman whose initial manifestation was cough productive of bronchial casts. Two years later the patient developed a chylothorax. Ligation of the thoracic duct through a low thoracotomy was curative. 相似文献
8.
Mesenteric and retroperitoneal cysts are rare intra-abdominal tumors. Ten new patients are presented as well as 152 other cases reported in the English literature. These 162 cases were then analyzed for significant trends. Patients under 10 years of age were significantly different from the older group with respect to a shorter duration of symptoms, a higher number of patients requiring an emergency operation, a lower number of recurrences and the location of the cyst. Patients with retroperitoneal cysts were more likely to have incomplete excision of the cyst and therefore had a higher incidence of recurrence. They also required marsupialization more often. Retroperitoneal cysts should be considered a different entity from mesenteric cysts even though they present clinically in a similar fashion. The outcome of surgical treatment is less satisfactory in patients with retroperitoneal cysts. 相似文献
9.
R. B. Stewart D. L. Kurtz M. Zweifel T. -K. Li J. C. Froehlich 《Psychopharmacology》1992,106(2):169-174
The duration of retention of tolerance to ethanol was tested in the alcohol-preferring (P) and alcohol-nonpreferring (NP)
rats lines, using ethanol-induced hypothermia as a measure of tolerance. Rats received two injections of ethanol (3.5 g/kg)
body wt, IP) and the time between the injections was 1, 2, or 3 days. When one day separated the two injections, tolerance
to the hypothermic effect of a second “test” injection was found in both lines. When 2 or 3 days separated the two injections,
the P line showed a loss of tolerance and the NP line showed sensitization to ethanol. Sensitization in the NP line grew stronger
when the interval between injections was increased from 2 to 3 days. The duration of retention of tolerance to ethanol-induced
hypothermia in the P line was shorter than has previously been reported for motor impairment in this line. It appears that
the duration of tolerance retention in the P line depends on the test used to measure tolerance. Sensitization to ethanol
in the NP line may be associated with low oral ethanol intake.
This research was supported, in part, by grants AA08312, AA03243, and AA07611 from the PHS 相似文献
10.