全文获取类型
收费全文 | 1893篇 |
免费 | 244篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 24篇 |
儿科学 | 63篇 |
妇产科学 | 24篇 |
基础医学 | 175篇 |
口腔科学 | 63篇 |
临床医学 | 259篇 |
内科学 | 346篇 |
皮肤病学 | 103篇 |
神经病学 | 130篇 |
特种医学 | 167篇 |
外科学 | 245篇 |
综合类 | 102篇 |
现状与发展 | 30篇 |
预防医学 | 157篇 |
眼科学 | 79篇 |
药学 | 76篇 |
中国医学 | 3篇 |
肿瘤学 | 109篇 |
出版年
2024年 | 14篇 |
2023年 | 179篇 |
2022年 | 13篇 |
2021年 | 21篇 |
2020年 | 60篇 |
2019年 | 24篇 |
2018年 | 54篇 |
2017年 | 49篇 |
2016年 | 43篇 |
2015年 | 61篇 |
2014年 | 93篇 |
2013年 | 81篇 |
2012年 | 53篇 |
2011年 | 54篇 |
2010年 | 82篇 |
2009年 | 99篇 |
2008年 | 65篇 |
2007年 | 74篇 |
2006年 | 43篇 |
2005年 | 40篇 |
2004年 | 31篇 |
2003年 | 37篇 |
2002年 | 39篇 |
2001年 | 29篇 |
2000年 | 32篇 |
1999年 | 40篇 |
1998年 | 40篇 |
1997年 | 54篇 |
1996年 | 53篇 |
1995年 | 48篇 |
1994年 | 41篇 |
1993年 | 42篇 |
1992年 | 19篇 |
1991年 | 32篇 |
1990年 | 26篇 |
1989年 | 39篇 |
1988年 | 41篇 |
1987年 | 43篇 |
1986年 | 20篇 |
1985年 | 26篇 |
1984年 | 20篇 |
1983年 | 18篇 |
1982年 | 11篇 |
1981年 | 19篇 |
1980年 | 17篇 |
1978年 | 17篇 |
1977年 | 12篇 |
1976年 | 23篇 |
1975年 | 16篇 |
1972年 | 11篇 |
排序方式: 共有2155条查询结果,搜索用时 15 毫秒
1.
A mixed‐method study of effects of a therapeutic play intervention for children on parental anxiety and parents' perceptions of the intervention
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
2.
M K Sorenson 《Physical therapy》1989,69(12):1059-1064
The purpose of this article is to increase the therapist's awareness of the effects of edema on the hand and the need for early treatment. The physiology of tissue fluid production and the two basic types of edema are discussed. The use of elevation, compression, and active exercise are the primary methods of controlling edema in the hand. Various modalities and commercial compression dressings are helpful for intractable edema; however, early intervention and treatment of the edematous hand can prevent subsequent hand dysfunction and sequelae. 相似文献
3.
Corneal pachymetry performed 3 days after application of a variety of test materials to the rabbit eye was found to be predictive of the eye irritation classification determined by observing the ocular response for 21 days. The test materials included NaOH, methanol, isopropanol, acetone, cyclohexanone, hexane and a shampoo. A 0.1-ml sample of the test material was placed in the conjunctival sac in the left eye of each rabbit. Both the left and the right eye of each rabbit were evaluated for irritation and corneal thickness for up to 21 days using a slit-lamp biomicroscope with a pachymeter attachment. On day 3 of observation the mean corneal thickness ratios (treated/control eye) were predictive of the duration of corneal cloudiness (correlation coefficient = 0.86). In addition, these ratios were predictive of the eye irritation classification as determined by a 21-day test (correlation coefficient = 0.98). Corneal pachymetry for determining eye irritation classification is presented as an alternative to the current 21-day test. It is more objective and requires a shorter observation period. Therefore, this method should lessen the cost of eye irritation testing and decrease the duration of discomfort that may occur among the test animals. The greater objectivity may also reduce the intra- and interlaboratory variation and the number of rabbits required for each testing. 相似文献
4.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
5.
Jennifer M Griffith James R Sorenson J Michael Bowling Tracey Jennings-Grant 《Health education & behavior》2005,32(5):613-626
The Enhancing Patient Prenatal Education study tested the feasibility and educational impact of an interactive program for patient prenatal genetic screening and testing education. Patients at two private practices and one public health clinic participated (N = 207). The program collected knowledge and measures of anxiety before and after use of the tool. Time in various prenatal visit activities was collected prior to and after the introduction of the education tool. Providers completed an assessment of their experiences with patients who had used the program. Results indicate that patient knowledge significantly increased from pre to post (p = .0001) with no increase in anxiety (p = .31). Time in clinic activities, including overall visit time, increased. A majority of providers indicated that the program disrupted clinic flow. This assessment suggests that the program increases patient knowledge and does not increase patient anxiety. However, challenges remain to using this program in a clinic setting. 相似文献
6.
M Roch-Arveiller V Revelant D Pham Huy L Maman J Fontagne J R Sorenson J P Giroud 《Agents and actions》1990,31(1-2):65-71
Interaction between anti-inflammatory drugs and reactive oxygen metabolites must be considered in the course of pharmacological studies intended to develop new compounds. Effects of indomethacin, aspirin, and 3,5-diisopropylsalicylic acid (3,5-DIPS) and their copper complexes on PMNL oxidative metabolism and the evolution of an acute inflammatory reaction were studied in the rat. Experiments were performed in vitro by assessment of superoxide generation and reduction of chemiluminescence by PMNLs incubated or not (control) in medium containing various concentrations of these compounds. A dose-related decrease of these parameters was observed, however, copper complexes were found to be more effective than their parent drugs or Cu gluconate. Copper complexes were also more effective anti-inflammatory agents than their parent ligands or Cu gluconate when the volume of exudate and number of exudate PMNLs were assessed after induction of pleurisy in rats by injection of isologous serum. It is concluded that modulation of the PMNL oxidative burst by copper complexes offers an accounting for the anti-inflammatory activity of these compounds. 相似文献
7.
8.
A general model is developed for segmenting magnetic resonance images using vector decomposition and probabilfty techniques. Each voxel is assigned fractional volumes of q tissues from p differently weighted images (q ≤ p + 1) in the presence of partial-volume mixing, random noise, and other tissues. Compared wtth the eigenimage method, fewer differently weighted images are needed for segmenting the q tissues, and the contrast-to-noise ratio in the calculated fractional volumes is improved. The model can produce com-posrte tissue-type images similar to that of the probability methods, by comparing the fractional volumes assigned to different tissues on each voxel. A three-tissue (p = 2, q = 3) model is illustrated for segmenting three tissues from dual-echo images. M provides statistical analysis to the algebraic method. A three-compartment phantom is segmented for validation. Two clinical examples are presented. 相似文献
9.
10.