全文获取类型
收费全文 | 529篇 |
免费 | 27篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 31篇 |
妇产科学 | 5篇 |
基础医学 | 61篇 |
口腔科学 | 2篇 |
临床医学 | 50篇 |
内科学 | 86篇 |
皮肤病学 | 7篇 |
神经病学 | 35篇 |
特种医学 | 146篇 |
外科学 | 40篇 |
综合类 | 31篇 |
预防医学 | 28篇 |
眼科学 | 2篇 |
药学 | 24篇 |
中国医学 | 3篇 |
肿瘤学 | 15篇 |
出版年
2022年 | 2篇 |
2021年 | 6篇 |
2020年 | 3篇 |
2019年 | 7篇 |
2018年 | 12篇 |
2017年 | 4篇 |
2016年 | 8篇 |
2015年 | 10篇 |
2014年 | 11篇 |
2013年 | 28篇 |
2012年 | 10篇 |
2011年 | 13篇 |
2010年 | 18篇 |
2009年 | 21篇 |
2008年 | 21篇 |
2007年 | 20篇 |
2006年 | 13篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 11篇 |
2002年 | 8篇 |
2001年 | 8篇 |
2000年 | 6篇 |
1999年 | 10篇 |
1998年 | 44篇 |
1997年 | 33篇 |
1996年 | 19篇 |
1995年 | 18篇 |
1994年 | 14篇 |
1993年 | 15篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 12篇 |
1989年 | 12篇 |
1988年 | 11篇 |
1987年 | 12篇 |
1986年 | 15篇 |
1985年 | 19篇 |
1984年 | 7篇 |
1983年 | 7篇 |
1982年 | 11篇 |
1981年 | 7篇 |
1980年 | 9篇 |
1979年 | 2篇 |
1978年 | 9篇 |
1977年 | 7篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1973年 | 1篇 |
排序方式: 共有567条查询结果,搜索用时 0 毫秒
41.
JK Stothers 《Archives of disease in childhood》1981,56(7):530-534
The thermal balance of 13 term infants was measured in a closed-circuit metabolism chamber. Each was studied naked, then with a gamgee-lined hat, and finally with a 'cummerbund' made of a similar material and of similar dimensions. At 27 degrees C the oxygen consumption of the 'hatted' babies was only 85% and the total heat loss 75% of the values measured with the infants naked. The cummerbund offered no detectable benefit. An additional 10 infants were studied while wearing a tubegauze hat at environmental temperatures of 28.5 (+/- 0.5) degrees C. This type of hat gave no measurable thermal protection. It is concluded that a substantial reduction of thermal stress in adverse environments can be achieved simply and clearly by adequately covering the vault of the skull. 相似文献
42.
In 3 infants functional intestinal obstruction, associated with a short small intestine, malrotation, and pyloric hypertrophy, was shown to be due to failure of development of the argyrophil myenteric plexus, with the absence of ongoing peristalsis. 4 infants with similar clinical features have been described previously, and there is evidence for an autosomal recessive mode of inheritance of this syndrome. 相似文献
43.
A history of pet contact and/or apparent clinical sensitivity was obtained in 65 (55%) of 118 unselected asthmatic children. These 65 children were skin tested and their sera examined for specific IgE using the radioallergosorbent test. Those children who had apparent clinical sensitivities had larger skin test reactions and were more likely to have positive specific IgE results than those without apparent sensitivities. Positive skin tests were very common (80%), but the larger the skin test reaction (weal diameter greater than 4 mm diameter) the more likely was there to be a positive history or a positive specific IgE result. Hence a large skin test reaction can provide a helpful pointer to animal allergy of clinical importance. Commercially available animal extracts have limitations for diagnostic tests. A questionnaire survey of 150 day schools emphasized the potential opportunities for contact with animal allergens at school. 相似文献
44.
Two sports-related knee injuries resulted in small fractures at the posteromedial corner of the tibial plateau. Magnetic resonance imaging demonstrated findings consistent with an avulsion injury at the semimembranosus insertion, as well as a similar pattern of internal derangement in both cases. 相似文献
45.
Pasquale Perrone-Filardi MD ; Luigi Corrado MD ; Gregorio Brevetti MD ; Antonio Silvestro MD ; Santo Dellegrottaglie MD ; Maria Cafiero MD ; Gianluca Caiazzo MD ; Andrea Petretta MD ; Antonio Maglione MD ; Cinzia Monda MD ; Giuseppina Guerra MD ; Antonio Marzano MD ; Paolo Cesarano MD ; Paola Gargiulo MD ; Massimo Chiariello MD 《Journal of clinical hypertension (Greenwich, Conn.)》2009,11(5):260-265
Endothelial dysfunction is a major determinant of atherosclerosis and a negative prognostic factor in patients with coronary artery disease and hypertension. Recovery of endothelial dysfunction has been associated with improved prognosis in these patients. The aim of the present study was to verify whether antagonism of angiotensin II AT1 receptors with an angiotensin receptor blocker, candesartan, improved endothelial function in patients with hypertension, stable coronary artery disease, and endothelial dysfunction. We studied 26 patients who were receiving β-blockers with optimal blood pressure control, in a randomized, double blind study. Patients were randomized to placebo (n=13) or to candesartan 16 mg/d (n=13) for 2 months. Endothelial function was assessed by ultrasound using hyperemic flow-mediated dilation of the brachial artery. Mean arterial blood pressure was unchanged in both groups (from 93.3±9.2 to 93.2±17.3 mm Hg in the candesartan group and from 101.3±14.2 to 102.3±13.9 mm Hg in the placebo group; both P =ns). Maximal blood flow was similar between placebo and candesartan groups at baseline and at the end of the study, whereas flow-mediated dilation significantly increased in the candesartan group (from 5.27%±1.69% to 7.15%±2.67%; P =0.01) but remained unchanged in the placebo group (from 4.49%±1.97% to 5.88%±2.30%; P =ns). AT1 receptor antagonism with candesartan, in addition to β-blocker therapy, improves endothelial function in high-risk hypertensive patients. 相似文献
46.
47.
48.
目的:测定炎痛净乳膏中双氯芬酸钠和苯佐卡因的含量。方法:高效液想象以谱法,甲醇为提取溶剂,地西泮为内标,No-va-PakC18色谱柱,甲醇-水-冰醋酸(80:20:0.5)为流动相,检测波长为283nm。结果:双氯芬酸钠和苯佐卡因在5μg/ml-40μg/ml范围内,其浓度与峰面积均呈良好的线性关系(r=0.9999),平均回收率分别为101.0%,RSD=1.21%,99.8%,RSD=0.62%。结论:本法专属性强,操作简便,结果准确。 相似文献
49.
We report two cases of sleep disturbances and perceptual disorder appearing in close temporal relationship with initiation of flunarizine therapy for migraine prophylaxis: these side effects disappeared after therapy interruption; resumption of the drug in one case was associated with symptom recurrence. 相似文献
50.