全文获取类型
收费全文 | 296篇 |
免费 | 44篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 8篇 |
妇产科学 | 5篇 |
基础医学 | 26篇 |
临床医学 | 31篇 |
内科学 | 46篇 |
皮肤病学 | 17篇 |
神经病学 | 12篇 |
特种医学 | 23篇 |
外科学 | 43篇 |
综合类 | 12篇 |
预防医学 | 43篇 |
眼科学 | 22篇 |
药学 | 31篇 |
中国医学 | 11篇 |
肿瘤学 | 6篇 |
出版年
2023年 | 4篇 |
2022年 | 2篇 |
2021年 | 5篇 |
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 8篇 |
2017年 | 2篇 |
2016年 | 6篇 |
2015年 | 6篇 |
2014年 | 9篇 |
2013年 | 13篇 |
2012年 | 17篇 |
2011年 | 17篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 20篇 |
2007年 | 25篇 |
2006年 | 19篇 |
2005年 | 21篇 |
2004年 | 6篇 |
2003年 | 5篇 |
2002年 | 12篇 |
2001年 | 7篇 |
2000年 | 4篇 |
1999年 | 5篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1991年 | 2篇 |
1990年 | 7篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 5篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1982年 | 6篇 |
1979年 | 4篇 |
1975年 | 6篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1972年 | 10篇 |
1971年 | 4篇 |
1970年 | 6篇 |
1969年 | 5篇 |
1968年 | 4篇 |
1966年 | 2篇 |
1934年 | 1篇 |
排序方式: 共有341条查询结果,搜索用时 15 毫秒
51.
Embryology of testicular descent and maldescent 总被引:1,自引:0,他引:1
K M Backhouse 《The Urologic clinics of North America》1982,9(3):315-325
52.
53.
T W Backhouse 《Clinical radiology》1979,30(3):259-262
An argument is advanced for the use of partial rotational techniques for the treatment of carcinoma of the bladder. One hundred and seventy cases are analysed: the majority were T3 solid transitional cell lesions with an overall (corrected) survival rate of 24.7%. Salvage cystectomy produced a four-year survival rate of 40% when performed within six months of the radiotherapy. 相似文献
54.
55.
Rosa E. Negrete Nadine Backhouse Ivan Cajigal Carla Delporte Bruce K. Cassels Eberhard Breitmaier Gert Eckhardt 《Journal of ethnopharmacology》1993,40(3):149-153
Two previously undescribed elemanolide esters, the 2-methylpropanoate and 2-methyl-2-propenoate of 11,13-dehydromelitensin, were isolated in the course of a bioassay-guided fractionation from the aerial parts of Centaurea chilensis Hook. et Arn., used traditionally to treat ‘gout and rheumatism’. The mixture of both substances exhibits antiinflammatory activity in the carrageenan-induced paw edema assay. 相似文献
56.
Backhouse JL Gidding HF McIntyre PB Gilbert GL 《Clinical and Vaccine Immunology : CVI》2006,13(7):764-767
To determine suitability for national serosurveys, we compared two commercial enzyme-linked immunosorbent assays (ELISAs) for mumps antibody, Enzygnost Anti-Parotitis-Virus/IgG (which uses a whole-virus antigen) and Microimmune Mumps IgG Screen ELISA (which uses a recombinant nucleoprotein antigen), by testing 1,915 opportunistically collected sera submitted to diagnostic laboratories across Australia in 1997 to 1998. The proportion of positive results increased with age in both ELISAs but was significantly higher with the Microimmune than with the Enzygnost ELISA overall (88% versus 63%; P < 0.01) and in all age groups. However, the proportion of equivocal results was significantly higher with the Enzygnost than with the Microimmune ELISA (9% versus 4%; P < 0.01). Of the 572 sera with discrepant or equivocal results, 508 had sufficient sample remaining to perform the neutralization test (NT). A proportion with concordant results in both ELISAs were also tested by the NT. For sera with discrepant results, there was significantly better agreement between the NT and Microimmune than between the NT and Enzygnost (310/444 [70%] versus 135/348 [39%]; P < 0.01). Of 64 sera with equivocal Microimmune results, 45 (70%) were positive in the NT compared with 140 of 160 (88%) equivocal Enzygnost results (P < 0.01). Compared with the NT, the Microimmune ELISA is more sensitive (96% versus 80%) but apparently less specific (36% versus 85%) than the Enzygnost ELISA. However, this is likely to be due to the generally lower sensitivity of the NT, since the Microimmune results reflect expected seroprevalence, based on vaccine uptake in the age groups studied. We conclude that the Microimmune ELISA is a more appropriate assay than the Enzygnost ELISA for estimation of mumps seroprevalence. 相似文献
57.
58.
59.
Caffeine's metabolic and performance effects have been widely reported. However, caffeine's effects on affective states during prolonged exercise are unknown. Therefore, this was examined in the present study. Following an overnight fast and in a randomised, double-blind, counterbalanced design, twelve endurance trained male cyclists performed 90 min of exercise at 70% VO2 max 1 h after ingesting 6 mg kg−1BM of caffeine (CAF) or placebo (PLA). Dimensions of affect and perceived exertion were assessed at regular intervals. During exercise, pleasure ratings were better maintained (F(3,38) = 4.99, P < 0.05) in the CAF trial compared to the PLA trial with significantly higher ratings at 15, 30 and 75 min (all P < 0.05). Perceived exertion increased (F(3,28) = 19.86, P < 0.01) throughout exercise and values, overall, were significantly lower (F(1,11) = 9.26, P < 0.05) in the CAF trial compared to the PLA trial. Perceived arousal was elevated during exercise but did not differ between trials. Overall, the results suggest that a moderate dose of CAF ingested 1 h prior to exercise maintains a more positive subjective experience during prolonged cycling. This observation may partially explain caffeine's ergogenic effects. 相似文献
60.
Howard A Mackenzie S Choksy S Arulampalan T Menzies D Motson R Backhouse C 《The British journal of surgery》2011,98(1):157-8; author reply 158