全文获取类型
收费全文 | 5302篇 |
免费 | 413篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 102篇 |
儿科学 | 232篇 |
妇产科学 | 83篇 |
基础医学 | 722篇 |
口腔科学 | 72篇 |
临床医学 | 433篇 |
内科学 | 1127篇 |
皮肤病学 | 135篇 |
神经病学 | 288篇 |
特种医学 | 153篇 |
外科学 | 615篇 |
综合类 | 317篇 |
一般理论 | 4篇 |
预防医学 | 335篇 |
眼科学 | 83篇 |
药学 | 433篇 |
中国医学 | 30篇 |
肿瘤学 | 565篇 |
出版年
2023年 | 26篇 |
2022年 | 67篇 |
2021年 | 121篇 |
2020年 | 68篇 |
2019年 | 98篇 |
2018年 | 128篇 |
2017年 | 80篇 |
2016年 | 115篇 |
2015年 | 123篇 |
2014年 | 164篇 |
2013年 | 207篇 |
2012年 | 358篇 |
2011年 | 343篇 |
2010年 | 197篇 |
2009年 | 171篇 |
2008年 | 279篇 |
2007年 | 305篇 |
2006年 | 217篇 |
2005年 | 194篇 |
2004年 | 193篇 |
2003年 | 178篇 |
2002年 | 148篇 |
2001年 | 159篇 |
2000年 | 163篇 |
1999年 | 157篇 |
1998年 | 65篇 |
1997年 | 51篇 |
1996年 | 44篇 |
1995年 | 44篇 |
1994年 | 49篇 |
1993年 | 37篇 |
1992年 | 118篇 |
1991年 | 81篇 |
1990年 | 76篇 |
1989年 | 98篇 |
1988年 | 53篇 |
1987年 | 64篇 |
1986年 | 51篇 |
1985年 | 56篇 |
1984年 | 34篇 |
1983年 | 27篇 |
1982年 | 28篇 |
1979年 | 27篇 |
1977年 | 43篇 |
1976年 | 25篇 |
1974年 | 32篇 |
1973年 | 41篇 |
1972年 | 34篇 |
1971年 | 29篇 |
1967年 | 33篇 |
排序方式: 共有5729条查询结果,搜索用时 15 毫秒
1.
Drishty Satpati Ketaki Bapat Archana Mukherjee Sharmila Banerjee Kanchan Kothari Meera Venkatesh 《Applied radiation and isotopes》2006,64(8):888-892
Studies on the development of imaging agents for targeting neuroreceptors is an area of considerable interest owing to the limited availability of specific as well as selective radiolabeled agents. Therefore, with an aim of developing a receptor-specific agent, iminodiacetic acid (IDA) derivative of 5-hydroxy tryptamine viz., HTIDA has been synthesized. HTIDA could be radiolabeled with the synthon [(99m)Tc(CO)(3)(H(2)O)(3)](+) in >98% yield. The biodistribution studies in normal Swiss mice showed that the (99m)Tc(CO)(3)-HTIDA crosses the blood-brain barrier successfully with a brain uptake of 0.5%ID/g at 5min post injection. The other relevant observations from biodistribution studies included no significant uptake in any other organ and fast clearance from blood, lungs and liver. 相似文献
2.
K S Rao N Ananthakrishnan A Banerjee 《The Australian and New Zealand journal of surgery》1988,58(9):723-726
A total of 50 consecutive patients who were treated in JIPMER Hospital between 1970 and 1981 for corrosive injuries of the oesophagus and stomach were analysed. There were 23 males and 27 females. All but seven presented with dysphagia due to an established stricture. In addition seven of them had associated stricture of the stomach. They were treated with either repeated dilatations or, in selected cases, oesophageal replacement. Perforation of the oesophagus is an important complication associated with oesophageal dilatation indicating the need for oesophageal replacement in multiple or long dense strictures. Results are quite satisfactory with both modalities of treatment. However, oesophageal replacement surgery, performed properly in selected cases, offers a permanent solution to these unfortunate victims. 相似文献
3.
Between June and September, 1986, an outbreak of measles occurred in Pilkhi Primary Health Centre area (population 56,000) in Tehri Garhwal district, Uttar Pradesh, India. Overall, 1092 cases were identified and 62 died; case-fatality ratio was 5.7%. Illness was restricted primarily to children below 15 years of age; 38% cases were in children under 5 and 58% between 5-14 years of age. To better characterize the outbreak, a survey was conducted in 13 affected villages. The age of the cases ranged from 5 months to 19 years (median = 7.0 years). The age-specific attack rates were 22.4%, 54.5%, 46.2% and 35.3% for children under 1, 1-4, 5-9, 10-14 years of age respectively. In as many as four villages, the attack rate in children below ten was 80% or more. Secondary attack rate among family members was 70%. Overall, 82% of children with measles developed complications which consisted mainly of pneumonia, diarrhoea and dysentery. The age-specific case-fatality ratios in infants and children 1-4 years of age were 23.1% and 11.5% respectively; thereafter the rates tended to decline with increasing age and was higher in females than in males (less than 0.05). Pneumonia which was a complication in 39% of measles cases contributed to 56% of deaths. Traditional beliefs and customs in the area were strong and did not encourage treatment of measles cases. Although a measles vaccination programme has been launched in India since 1985, only 30 districts could be covered during the first year and another 90 during 1986.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
4.
Effects of periodic weight support in a simulated weightless environment in preventing bone demineralisation. 总被引:1,自引:0,他引:1
P K Jain E M Iyer P K Banerjee N S Baboo 《Indian journal of physiology and pharmacology》2003,47(1):81-86
Anti Orthostatic Hypokinetic posture in rats by tail suspension for 15 days (d) simulates the deconditioning effects of weightlessness on the weight bearing bones. The present study evaluates the effects of daily 4 hour (h) weight support (WS) during simulated weightlessness (S-W) in preventing these changes. Adult male albino rats were divided into three groups as (i) Control (CON, n = 12), (ii) Hind limb unweighing by tail suspension for 15 d (HU, n = 18), (iii) HU with daily 4 h WS (4 HRWS, n = 11). After 15 d tibia from all the animals were removed and subsequently dried, ashed and then calcium content of the bones were determined. HU showed reductions in the water content by 35.8%, organic matrix by 12.2% and calcium content by 33.4% of tibia. 4 h WS during S-W resulted in complete prevention of water loss and organic matrix loss and partial prevention of the loss of calcium content. Calcium content of tibia in 4 HRWS remained 15.2% less as compared to CON. These findings indicate that 4 h WS is partially successful in preventing the demineralisation effects of S-W on weight bearing bone tibia. 相似文献
5.
A case of poisoning with 100 mg of oxybutynin in a 34-year-old female is reported. The main features were anticholinergic effects, including stupor, followed by disorientation and agitation on awakening, dilated pupils, dry skin and retention of urine. She had a sinus tachycardia which resolved 3 h after admission, and in addition ventricular ectopics and bigeminy which continued for a further 30 h. She recovered fully on symptomatic treatment alone. 相似文献
6.
7.
The treatment of neoplasia with interleukin-2 (IL-2) can be complicated by neurological deficits resembling transient Ischemic attack and stroke. We investigated whether interleukin-2 contributes to the natural course of cerebrovascular ischemia and particularly to the pathogenesis of infection-associated stroke. Plasma levels of interleukin-2 were below the level of detectability in almost all measurements. Patients with and without previous infection (n = 11, 805 ±445 U/ml vs n = 19, 824 ± 501 U/ml) did not have significantly higher levels of soluble interleukin-2 receptors than control subjects with (n = 14, 667 ± 229 U/ml) or without vascular risk factors (n = 17, 567 ± 176 U/ml). Receptor levels increased in patients during the first week after stroke (n = 15, 1157 ± 1013, p < 0.02). Levels of soluble T8 antigen (sT8) were higher in patients (n – 26, 320 ± 112 U/ml) than in healthy control subjects (n = 15, 246 ± 92 U/ml; p < 0.05) and sT8 levels increased during the first week after stroke (p < 0.05). These results reflect an immunological response to the cerebral infarct; they do not indicate a general role of the IL-2 system in the pathogenesis of ischemic stroke with or without previous infection. 相似文献
8.
9.
10.