全文获取类型
收费全文 | 2290篇 |
免费 | 148篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 27篇 |
妇产科学 | 74篇 |
基础医学 | 277篇 |
口腔科学 | 26篇 |
临床医学 | 297篇 |
内科学 | 624篇 |
皮肤病学 | 27篇 |
神经病学 | 303篇 |
特种医学 | 70篇 |
外科学 | 332篇 |
综合类 | 7篇 |
预防医学 | 70篇 |
眼科学 | 15篇 |
药学 | 100篇 |
中国医学 | 4篇 |
肿瘤学 | 185篇 |
出版年
2023年 | 20篇 |
2022年 | 40篇 |
2021年 | 59篇 |
2020年 | 33篇 |
2019年 | 59篇 |
2018年 | 55篇 |
2017年 | 55篇 |
2016年 | 54篇 |
2015年 | 49篇 |
2014年 | 86篇 |
2013年 | 101篇 |
2012年 | 149篇 |
2011年 | 145篇 |
2010年 | 96篇 |
2009年 | 89篇 |
2008年 | 163篇 |
2007年 | 141篇 |
2006年 | 114篇 |
2005年 | 124篇 |
2004年 | 114篇 |
2003年 | 112篇 |
2002年 | 106篇 |
2001年 | 51篇 |
2000年 | 58篇 |
1999年 | 45篇 |
1998年 | 27篇 |
1997年 | 16篇 |
1996年 | 18篇 |
1995年 | 16篇 |
1994年 | 11篇 |
1993年 | 11篇 |
1992年 | 23篇 |
1991年 | 23篇 |
1990年 | 17篇 |
1989年 | 11篇 |
1988年 | 22篇 |
1987年 | 14篇 |
1986年 | 7篇 |
1985年 | 8篇 |
1984年 | 13篇 |
1983年 | 8篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 8篇 |
1979年 | 5篇 |
1974年 | 5篇 |
1973年 | 7篇 |
1969年 | 8篇 |
1968年 | 8篇 |
1966年 | 4篇 |
排序方式: 共有2448条查询结果,搜索用时 0 毫秒
1.
F Sebastiano G Di Gennaro V Esposito A Picardi R Morace A Sparano A Mascia C Colonnese G Cantore P P Quarato 《Clinical neurophysiology》2006,117(2):341-347
OBJECTIVES: To evaluate a novel method for localization of subdural electrodes in presurgical assessment of patients with drug-resistant focal epilepsy. METHODS: We studied eight consecutive patients with posterior epilepsy in whom subdural electrodes were implanted for presurgical evaluation. Electrodes were detected on post-implantation brain CT scans through a semiautomated procedure based on a MATLAB routine. Then, post-implantation CT scans were fused with pre-implantation MRI to localize the electrodes in relation to the underlying cortical structures. The reliability of this procedure was tested by comparing 3D-rendered MR images of the electrodes with electrode position as determined by intraoperative digital photography. RESULTS: In each patient, all electrodes could be correctly localized and visualized in a stereotactic space, thus allowing optimal surgery planning. The agreement between the procedure-generated images and the digital photographs was good according to two independent raters. The mean mismatch between the 3D images and the photographs was 2 mm. CONCLUSIONS: While our findings need confirmation on larger samples including patients with anterior epilepsy, this procedure allowed to localize subdural electrodes and to establish the spatial relationship of each electrode to the underlying brain structure, either normal or damaged, on brain convessity, basal and medial cortex. SIGNIFICANCE: Being simple, rapid, unexpensive, and reliable, this procedure holds promise to be useful to optimize epilepsy surgery planning. 相似文献
2.
I Ilardi S C Shiddo H H Mohamed C Mussa A S Hussein C S Mohamed K Bile A Sebastiani C Bianchini S Sanguigni 《Transactions of the Royal Society of Tropical Medicine and Hygiene》1987,81(2):336-338
About 85% of the population of two Somali communities harboured soil-transmitted intestinal nematodes and/or protozoa. The commonest parasite (75% in the Lafoole institution and 59% in the Afgoye institution) was Trichuris trichiura. Mixed infections were common. The source of infection is contaminated fields around dwelling quarters, because of indiscriminate defaecation. One of the factors responsible for the higher incidence of hookworm in Lafoole (45%) compared with Afgoye (1.5%) may be the different soil character of the surrounding fields. 相似文献
3.
Douglas Harrison Gennaro Selvaggi 《Journal of plastic, reconstructive & aesthetic surgery》2007,60(8):922-928
The most common surgical techniques performed for gluteal augmentation employ the use of implants and a combination of liposuction/lipo-injection procedures. We review the major literature concerning this subject with emphasis on gluteal implants, the various indications, surgical techniques and complications are discussed and we present some of our cases. Contour reconstruction, indications such as malformation, asymmetry, trauma and radiotherapy may require custom-made or regular implants, liposuction or lipo-injection procedures and sometimes free flaps. Gluteal implants for aesthetic purposes are widely used, particularly in South America, are easy to perform with a high success rate, whereas lipS200osuction and lipo-injection procedures require considerable experience in Coleman fat injection. 相似文献
4.
M Brai G Gennaro M Marrale A Bartolotta M C D'Oca 《Applied radiation and isotopes》2007,65(4):435-439
ESR response to gamma-irradiation (1-50 Gy) of blends containing alanine and either B(OH)(3) or Gd(2)O(3) is reported. The sensitivity of the alanine--B(OH)(3) blend is comparable to the sensitivity of pure alanine, although its lowest detectable dose, LDD, is smaller ( approximately 1.3 Gy) than that of pure alanine ( approximately 2.9 Gy). Alanine with Gd(2)O(3) is about two times more sensitive than pure alanine, and its LDD is 0.8 Gy. The better sensitivity and LDD are probably due to the high atomic number (Z=64) of gadolinium, which enhances the interaction probability with photons and, consequently, the radical yield. This study suggests that other high-Z atoms may be useful for increasing the sensitivity of the response of alanine to gamma-radiation. 相似文献
5.
During the period from March to September 1989, 40 children suffering from primary nocturnal enuresis, aged between 5 and 14 years, were included in a study to assess the comparative therapeutical efficacy of DDAVP and acupuncture. Children were divided into four groups of 10: group A was treated with DDAVP, group B was treated with acupuncture, group C was treated with DDAVP and acupuncture and group D was treated with placebo (control). The trial design included 3 periods: observation (2 weeks), treatment (8 weeks) and follow-up (4 weeks). Nineteen children completed the study. The efficacy of treatment, which was expressed as a percentage of dry nights, was high in both the DDAVP and acupuncture groups, when used separately. The combined treatment of DDAVP and acupuncture appeared to be the most efficacious both in terms of the percentage of dry nights at the end of treatment and in relation to the stability of results, even after the end of the study. The paper gives a detailed analysis of correlations between type of treatment and urinary osmolarity. 相似文献
6.
7.
8.
The Role of Donor Bone Marrow Infusions in Withdrawal of Immunosuppression in Adult Liver Allotransplantation 总被引:3,自引:0,他引:3
Panagiotis Tryphonopoulos reas G. Tzakis Debbie Weppler Rolando Garcia-Morales Tomoaki Kato Juan R. Madariaga David M. Levi Seigo Nishida Jang Moon Gennaro Selvaggi Arie Regev Caio Nery Pablo Bejarano Amr Khaled Gary Kleiner Violet Esquenazi Joshua Miller Philip Ruiz Camillo Ricordi 《American journal of transplantation》2005,5(3):608-613
We investigated the role of donor bone marrow cell (DBMC) infusions in immunosuppression withdrawal in adult liver transplantation. Patients enrolled were at least 3 years post-transplantation, with stable graft function. Forty-five (study group: G1) received DBMC, and 59 (control group: G2) did not. Immunosuppression was reduced by one third upon enrollment, by another third the second year of the study and was completely withdrawn the third year. Patient and graft survival were similar between the two groups. Although rejection episodes were significantly less in G1 the first 2 years of the study (35% vs. 57%, p = 0.016), there was no significant difference overall (74% vs. 81%, p = 0.14). Until February 2004, 20 patients, 10 in each group, were immunosuppression free for 1-3 years. Approximately 20% of long-term survivors of liver transplantation can successfully discontinue their immunosuppression. DBMC infusions, do not increase this likelihood. 相似文献
9.
An outbreak of cholera in a refugee camp in Africa 总被引:1,自引:0,他引:1
C. Djeddah A. Miozzo M. Di Gennaro F. Rosmini P. Martino P. Pasquini 《European journal of epidemiology》1988,4(2):227-230
A total of 541 cases of cholera were observed between May 7 and July 19, 1985 among the 9,929 displaced persons present in a refugee camp in Africa.In spite of malnutrition and other diseases affecting this population, only 12 deaths occurred.Antiepidemic measures consisted of preparation of isolation-wards, treatment of contaminated materials, training of refugees and patient care. Mass prophylaxis, initially considered, was dropped before the end of the epidemic.Corresponding author. 相似文献
10.
The improvements in the motor ability in patients with Parkinson's disease due to antiparkinsonian medication is well-known and widely documented. Recent results, based both on kinematic parameters and standard electromyographic (EMG) signal analysis, clearly indicated that the medication reduced, as expected, the clinical signs of Parkinson's disease, but did not restore agonist burst duration modulation with distance in elbow flexion movements. The main aim of the present work is to shed more light on this medication effect using a wavelet analysis approach on multiple EMG signals recorded both on shoulder and elbow muscles in ballistic or rapid movements. The wavelet cross-correlation information allows us to evidence some important quantitative features of the EMG signals due to medication. 相似文献