全文获取类型
收费全文 | 1506篇 |
免费 | 188篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 28篇 |
妇产科学 | 15篇 |
基础医学 | 186篇 |
口腔科学 | 52篇 |
临床医学 | 142篇 |
内科学 | 499篇 |
皮肤病学 | 20篇 |
神经病学 | 66篇 |
特种医学 | 100篇 |
外科学 | 296篇 |
综合类 | 26篇 |
预防医学 | 60篇 |
眼科学 | 8篇 |
药学 | 53篇 |
中国医学 | 3篇 |
肿瘤学 | 119篇 |
出版年
2023年 | 16篇 |
2022年 | 13篇 |
2021年 | 40篇 |
2020年 | 20篇 |
2019年 | 25篇 |
2018年 | 40篇 |
2017年 | 39篇 |
2016年 | 38篇 |
2015年 | 34篇 |
2014年 | 45篇 |
2013年 | 58篇 |
2012年 | 63篇 |
2011年 | 55篇 |
2010年 | 36篇 |
2009年 | 43篇 |
2008年 | 63篇 |
2007年 | 59篇 |
2006年 | 58篇 |
2005年 | 58篇 |
2004年 | 49篇 |
2003年 | 51篇 |
2002年 | 58篇 |
2001年 | 61篇 |
2000年 | 49篇 |
1999年 | 38篇 |
1998年 | 29篇 |
1997年 | 18篇 |
1996年 | 23篇 |
1995年 | 19篇 |
1994年 | 19篇 |
1993年 | 11篇 |
1992年 | 37篇 |
1991年 | 33篇 |
1990年 | 29篇 |
1989年 | 35篇 |
1988年 | 34篇 |
1987年 | 23篇 |
1986年 | 27篇 |
1985年 | 24篇 |
1984年 | 15篇 |
1983年 | 15篇 |
1982年 | 12篇 |
1981年 | 11篇 |
1980年 | 14篇 |
1979年 | 22篇 |
1978年 | 18篇 |
1977年 | 22篇 |
1976年 | 11篇 |
1975年 | 9篇 |
1974年 | 11篇 |
排序方式: 共有1698条查询结果,搜索用时 15 毫秒
1.
We report a case of dichorionic, diamniotic twins who developed similar erythematous, annular, erosive plaques in the inguinal folds in the first few weeks of life that were refractory to topical antifungals and oral antibiotics. The twins were found to have high transaminase levels, antinuclear antibody positivity, and anti‐SSS/Ro) and anti‐SSB/La autoantibodies. The rash resolved without scarring by 7 months of age with the use of low‐potency topical corticosteroids. We suggest that physicians consider neonatal lupus erythematosus in neonates with atypical eruptions occurring in sun‐protected skin. 相似文献
2.
3.
Similar dose responsiveness of hepatic glycogenolysis and gluconeogenesis to glucagon in vivo 总被引:6,自引:0,他引:6
R W Stevenson K E Steiner M A Davis G K Hendrick P E Williams W W Lacy L Brown P Donahue D B Lacy A D Cherrington 《Diabetes》1987,36(3):382-389
This study was undertaken to determine whether the dose-dependent effect of glucagon on gluconeogenesis parallels its effect on hepatic glycogenolysis in conscious overnight-fasted dogs. Endogenous insulin and glucagon secretion were inhibited by somatostatin (0.8 micrograms X kg-1 X min-1), and intraportal replacement infusions of insulin (213 +/- 28 microU X kg-1 X min-1) and glucagon (0.65 ng X kg-1 X min-1) were given to maintain basal hormone concentrations for 2 h (12 +/- 2 microU/ml and 108 +/- 23 pg/ml, respectively). The glucagon infusion was then increased 2-, 4-, 8-, or 12-fold for 3 h, whereas the rate of insulin infusion was left unchanged. Glucose production (GP) was determined with 3-[3H]glucose, and gluconeogenesis (GNG) was assessed with tracer (U-[14C]alanine conversion to [14C]glucose) and arteriovenous difference (hepatic fractional extraction of alanine, FEA) techniques. Increases in plasma glucagon of 53 +/- 8, 199 +/- 48, 402 +/- 28, and 697 +/- 149 pg/ml resulted in initial (15-30 min) increases in GP of 1.1 +/- 0.4 (N = 4), 4.9 +/- 0.5 (N = 4), 6.5 +/- 0.6 (N = 6), and 7.7 +/- 1.4 (N = 4) mg X kg-1 X min-1, respectively; increases in GNG (approximately 3 h) of 48 +/- 19, 151 +/- 50, 161 +/- 25, and 157 +/- 7%, respectively; and increases in FEA (3 h) of 0.14 +/- 0.07, 0.37 +/- 0.05, 0.42 +/- 0.04, and 0.40 +/- 0.17, respectively. In conclusion, GNG and glycogenolysis were similarly sensitive to stimulation by glucagon in vivo, and the dose-response curves were markedly parallel. 相似文献
4.
5.
6.
7.
8.
9.
10.
In vitro and in vivo precipitation of iodinated contrast agents when ioxaglate and papaverine are given together has been reported. To verify these reports and to investigate other medications not previously tested, the authors analyzed mixtures of contrast agents and medications in vitro with a light spectrophotometer and observed them for visible precipitates for up to 120 minutes. Previously reported incompatibilities between ionic or low-osmolality contrast media and medications were verified, and several new incompatibilities were discovered. No incompatibilities were found when the drugs tested were mixed with the new nonionic contrast media. 相似文献