全文获取类型
收费全文 | 4407篇 |
免费 | 278篇 |
国内免费 | 34篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 134篇 |
妇产科学 | 100篇 |
基础医学 | 414篇 |
口腔科学 | 67篇 |
临床医学 | 250篇 |
内科学 | 1381篇 |
皮肤病学 | 142篇 |
神经病学 | 283篇 |
特种医学 | 78篇 |
外科学 | 654篇 |
综合类 | 76篇 |
现状与发展 | 2篇 |
一般理论 | 3篇 |
预防医学 | 573篇 |
眼科学 | 93篇 |
药学 | 175篇 |
中国医学 | 22篇 |
肿瘤学 | 239篇 |
出版年
2023年 | 64篇 |
2022年 | 69篇 |
2021年 | 173篇 |
2020年 | 160篇 |
2019年 | 395篇 |
2018年 | 297篇 |
2017年 | 180篇 |
2016年 | 145篇 |
2015年 | 145篇 |
2014年 | 194篇 |
2013年 | 245篇 |
2012年 | 108篇 |
2011年 | 143篇 |
2010年 | 114篇 |
2009年 | 102篇 |
2008年 | 124篇 |
2007年 | 107篇 |
2006年 | 88篇 |
2005年 | 74篇 |
2004年 | 64篇 |
2003年 | 43篇 |
2002年 | 38篇 |
2001年 | 47篇 |
2000年 | 28篇 |
1999年 | 36篇 |
1998年 | 18篇 |
1997年 | 16篇 |
1996年 | 12篇 |
1995年 | 10篇 |
1994年 | 17篇 |
1993年 | 8篇 |
1992年 | 8篇 |
1991年 | 7篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 80篇 |
1984年 | 170篇 |
1983年 | 134篇 |
1982年 | 139篇 |
1981年 | 145篇 |
1980年 | 102篇 |
1979年 | 125篇 |
1978年 | 118篇 |
1977年 | 75篇 |
1976年 | 103篇 |
1975年 | 83篇 |
1974年 | 78篇 |
1973年 | 73篇 |
排序方式: 共有4719条查询结果,搜索用时 62 毫秒
61.
Wan Beom Park Ranawaka A.P.M. Perera Pyoeng Gyun Choe Eric H.Y. Lau Seong Jin Choi June Young Chun Hong Sang Oh Kyoung-Ho Song Ji Hwan Bang Eu Suk Kim Hong Bin Kim Sang Won Park Nam Joong Kim Leo Lit Man Poon Malik Peiris Myoung-don Oh 《Emerging infectious diseases》2015,21(12):2186-2189
We investigated the kinetics of serologic responses to Middle East respiratory syndrome coronavirus (MERS-CoV) infection by using virus neutralization and MERS-CoV S1 IgG ELISA tests. In most patients, robust antibody responses developed by the third week of illness. Delayed antibody responses with the neutralization test were associated with more severe disease. 相似文献
62.
Jila Yavarian Farshid Rezaei Azadeh Shadab Mahmood Soroush Mohammad Mehdi Gooya Talat Mokhtari Azad 《Emerging infectious diseases》2015,21(2):362-364
During January 2013–August 2014, a total of 1,800 patients in Iran who had respiratory illness were tested for Middle East respiratory syndrome coronavirus. A cluster of 5 cases occurred in Kerman Province during May–July 2014, but virus transmission routes for some infections were unclear. 相似文献
63.
Eileen Schneider Christina Chommanard Jessica Rudd Brett Whitaker Luis Lowe Susan I. Gerber 《Emerging infectious diseases》2015,21(7):1220-1223
Middle East respiratory syndrome (MERS) cases continue to be reported from the Middle East. Evaluation and testing of patients under investigation (PUIs) for MERS are recommended. In 2013–2014, two imported cases were detected among 490 US PUIs. Continued awareness is needed for early case detection and implementation of infection control measures. 相似文献
64.
Shamsudeen F. Fagbo Leila Skakni Daniel K.W. Chu Musa A. Garbati Mercy Joseph Malik Peiris Ahmed M. Hakawi 《Emerging infectious diseases》2015,21(11):1981-1988
We investigated an outbreak of Middle East respiratory syndrome (MERS) at King
Fahad Medical City (KFMC), Riyadh, Saudi Arabia, during March 29–May 21,
2014. This outbreak involved 45 patients: 8 infected outside KFMC, 13 long-term
patients at KFMC, 23 health care workers, and 1 who had an indeterminate source
of infection. Sequences of full-length MERS coronavirus (MERS-CoV) from 10
patients and a partial sequence of MERS-CoV from another patient, when compared
with other MERS-CoV sequences, demonstrated that this outbreak was part of a
larger outbreak that affected multiple health care facilities in Riyadh and
possibly arose from a single zoonotic transmission event that occurred in
December 2013 (95% highest posterior density interval November 8,
2013–February 10, 2014). This finding suggested continued health
care–associated transmission for 5 months. Molecular epidemiology
documented multiple external introductions in a seemingly contiguous outbreak
and helped support or refute transmission pathways suspected through
epidemiologic investigation. 相似文献
65.
Maimuna S. Majumder Sheryl A. Kluberg Sumiko R. Mekaru John S. Brownstein 《Emerging infectious diseases》2015,21(11):2088-2090
As of July 15, 2015, the South Korean Ministry of Health and Welfare had reported 186 case-patients with Middle East respiratory syndrome in South Korea. For 159 case-patients with known outcomes and complete case histories, we found that older age and preexisting concurrent health conditions were risk factors for death. 相似文献
66.
Ran-hui Cha Joon-Sung Joh Ina Jeong Ji Yeon Lee Hyoung-Shik Shin Gayeon Kim Yeonjae Kim Critical Care Team of National Medical Center 《Journal of Korean medical science》2015,30(12):1807-1814
Some cases of Middle East Respiratory Syndrome-Coronavirus (MERS-CoV) infection presented renal function impairment after the first MERS-CoV patient died of progressive respiratory and renal failure. Thus, MERS-CoV may include kidney tropism. However, reports about the natural courses of MERS-CoV infection in terms of renal complications are scarce. We examined 30 MERS-CoV patients admitted to National Medical Center, Korea. We conducted a retrospective analysis of the serum creatinine (SCr), estimated glomerular filtration rate (eGFR), urine dipstick tests, urinary protein quantitation (ACR or PCR), and other clinical parameters in all patients. Two consecutive results of more than trace (or 1+) of albumin and blood on dipstick test occurred in 18 (60%) (12 [40%]) and 22 (73.3%) (19 [63.3%]) patients, respectively. Fifteen (50.0%) patients showed a random urine ACR or PCR more than 100 mg/g Cr. Eight (26.7%) patients showed acute kidney injury (AKI), and the mean and median durations to the occurrence of AKI from symptom onset were 18 and 16 days, respectively. Old age was associated with a higher occurrence of AKI in the univariate analysis (HR [95% CI]: 1.069 [1.013-1.128], P = 0.016) and remained a significant predictor of the occurrence of AKI after adjustment for comorbidities and the application of a mechanical ventilator. Diabetes, AKI, and the application of a continuous renal replacement therapy (CRRT) were risk factors for mortality in the univariate analysis (HR [95% CI]: diabetes; 10.133 [1.692-60.697], AKI; 12.744 [1.418-114.565], CRRT; 10.254 [1.626-64.666], respectively). Here, we report renal complications and their prognosis in 30 Korean patients with MERS-CoV. 相似文献
67.
Effects of dietary carbohydrate, fat, and protein on norepinephrine turnover in rats 总被引:1,自引:0,他引:1
To investigate effects of diet composition on rates of norepinephrine (NE) turnover in sympathetically innervated organs, weaning rats were fed for 2 to 21/2 weeks diets varying in carbohydrate (74.2% to 7.4% of total metabolizable energy) and fat (5.2% to 72.0%), or diets varying in protein (9.9% to 39.6%) and carbohydrate (77.8% to 48.1%). Changing the proportions of carbohydrate and fat in the diet, while maintaining similar intakes of energy and all other essential nutrients did not affect rates of NE turnover in heart, white adipose tissue (WAT), liver or pancreas and only minimally affected NE turnover in interscapular brown adipose tissue (IBAT). Decreasing the proportion of protein in the diet from 39.6% to 9.9% accelerated rats of NE turnover in heart (52%), IBAT (20%), WAT (42%), and liver (37%). When rats fed a diet containing 19.8% protein were also given a 10%(wt/vol) sucrose solution to drink for three days, their rates of NE turnover increased in heart (45%), IBAT (17%), liver (71%), and pancreas (55%). This response to sucrose depended on the protein content of the diet, since rats fed a 9.9% protein diet in which rates of NE turnover was already accelerated had no further increase in NE turnover when given the sucrose solution to drink. These data demonstrate that diet composition can affect activity of the sympathetic nervous system, as indicated by changes in rates of NE turnover. Changing the proportion of protein in the diet was more effective in altering NE turnover than changing the proportion of carbohydrate or fat. 相似文献
68.
YUKIHIKO KAWASAKI MITSUAKI HOSOYA SEIJI YASUMURA TETSUYA OHIRA HIROAKI SATOH HITOSHI SUZUKI AKIRA SAKAI AKIRA OHTSURU ATSUSHI TAKAHASHI KOTARO OZASA GEN KOBASHI KENJI KAMIYA SHUNICHI YAMASHITA MASAFUMI ABE THE FUKUSHIMA HEALTH MANAGEMENT SURVEY GROUP 《Fukushima journal of medical science》2015,61(2):101-110
69.
70.