全文获取类型
收费全文 | 1006篇 |
免费 | 53篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 34篇 |
儿科学 | 13篇 |
妇产科学 | 22篇 |
基础医学 | 107篇 |
口腔科学 | 22篇 |
临床医学 | 77篇 |
内科学 | 231篇 |
皮肤病学 | 29篇 |
神经病学 | 101篇 |
特种医学 | 34篇 |
外科学 | 200篇 |
综合类 | 13篇 |
预防医学 | 69篇 |
眼科学 | 6篇 |
药学 | 40篇 |
中国医学 | 6篇 |
肿瘤学 | 59篇 |
出版年
2023年 | 3篇 |
2022年 | 16篇 |
2021年 | 31篇 |
2020年 | 21篇 |
2019年 | 22篇 |
2018年 | 27篇 |
2017年 | 20篇 |
2016年 | 22篇 |
2015年 | 20篇 |
2014年 | 26篇 |
2013年 | 36篇 |
2012年 | 50篇 |
2011年 | 60篇 |
2010年 | 32篇 |
2009年 | 40篇 |
2008年 | 55篇 |
2007年 | 71篇 |
2006年 | 68篇 |
2005年 | 60篇 |
2004年 | 47篇 |
2003年 | 46篇 |
2002年 | 60篇 |
2001年 | 38篇 |
2000年 | 44篇 |
1999年 | 25篇 |
1998年 | 2篇 |
1997年 | 8篇 |
1996年 | 5篇 |
1995年 | 8篇 |
1994年 | 7篇 |
1993年 | 4篇 |
1992年 | 8篇 |
1991年 | 19篇 |
1990年 | 11篇 |
1989年 | 7篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1986年 | 9篇 |
1985年 | 4篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1981年 | 1篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1973年 | 3篇 |
1972年 | 2篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1929年 | 1篇 |
排序方式: 共有1063条查询结果,搜索用时 15 毫秒
71.
J M González-Santos E Bastida J L Vallejo R Fortuny K Abukassem O A Ortega R Arcas 《The Annals of thoracic surgery》1990,50(6):995-997
We describe the surgical technique of a localized and adjustable pericardial flap to protect internal mammary artery grafts. This flap allows selective pulmonary retraction, maintains pleural integrity, and saves most of the pericardium for later closure. This technique has proved to be simple and highly effective. We have used it in 80 patients and have not had any related complications. 相似文献
72.
73.
Miguel A Vallejo Javier Rivera Joaquim Esteve-Vives Group ICAF 《Health and quality of life outcomes》2010,8(1):2
Background
Fibromyalgia is a syndrome with heterogeneous symptoms. The evaluation in the clinical setting usually fails to cover the complexity of the syndrome. This study aims to determine how different aspects of fibromyalgia are inter-related when measured by means of a self-reporting tool. The objective is to develop a more complete evaluation model adjusted to the complexity and multi-dimensional nature of the syndrome. 相似文献74.
Eight years' experience with the Medtronic-Hall valve prosthesis 总被引:4,自引:0,他引:4
J L Vallejo J M Gonzalez-Santos J Albertos M J Riesgo M E Bastida M J Rico F Gonzalez-Diego R Arcas 《The Annals of thoracic surgery》1990,50(3):429-436
During the period January 1981 to September 1986, 444 Medtronic-Hall heart valve prostheses were implanted in 351 patients (mean age, 45 +/- 10 years) mainly for rheumatic valve disease (63.2%). Most of the patients were in New York Heart Association functional class III. Concomitant surgical procedures, mainly conservative tricuspid or mitral procedures or coronary artery bypass grafting, were performed in 101 patients (28.7%). Single-valve replacement was performed in 262 patients (74.6%) (aortic in 117 patients, mitral in 143, and tricuspid in 2), double-valve replacement in 85 (24.2%) (mitral and aortic in 83 and mitral and tricuspid in 2), and triple-valve replacement in 4 (1.1%). Hospital mortality was 6.2%. Follow-up was 97.7% complete. The overall actuarial 8-year survival rate was 77.2%. The linearized incidence of valve-related complications was as follows: thromboembolism, 1.5%/patient-year; reoperation, 1.5%/patient-year; endocarditis, 1.25%/patient-year; hemolysis, 0.52%/patient-year; anticoagulant-related hemorrhage, 0.39%/patient-year; and noninfection-related paraprosthetic leak, 0.33%/patient-year. There were no instances of structural failure. We conclude that after 8 years of follow-up, the Medtronic-Hall valve prosthesis has an excellent clinical performance and a low range of valve-related complications. 相似文献
75.
Álvaro Manzanas García María Concepción López Carrizosa Carmen Vallejo Ocaña Pilar Samper Ots José María Delgado Pérez Emilia Carretero Accame Pilar Gómez-Serranillos Luis de la Morena del Valle 《Clinical & translational oncology》2008,10(3):163-167
Objective The objective of this study is to evaluate the efficiency of SOD applied topically in oncologic patients affected by acute
radiodermatitis.
Materials and method This study includes 57 patients who showed a dermatitis grade 2 or superior; they were administered SOD ointment b.i.d. (40
mg, weekly) and follow-up continued for 12 weeks.
Results At the end of radiotherapy, 77.1% of the patients ameliorated completely or partially, and at the end of the 12-week period
100% of patients were free of toxicity. No acute toxicity relapses were reported. Response time reduced during radiotherapy,
as well as the treatment time at the end of it.
Conclusions The employment of SOD topically is efficient in the treatment of radiodermatitis, which is an acute side effect of radiotherapy. 相似文献
76.
77.
78.
Vanessa Gómez‐Vallejo Mikel González‐Esparza Jordi Llop 《Journal of labelled compounds & radiopharmaceuticals》2012,55(13):470-473
[11C]Me‐QNB is a muscarinic acetylcholinergic receptor antagonist that has been used for the assessment of myocardial muscarinic receptors density in different cardiovascular pathologies. In the current technical note, we report a facile, highly efficient and fully automated method for the preparation of this radiotracer. The radiosynthesis was performed by reaction of [11C]CH3I with the desmethylated precursor (QNB) at room temperature using the captive solvent method. Excellent radiochemical yield (91.1 ± 2.4%, decay‐corrected) and radiochemical purity (>99.5%), and good specific activity (137 ± 5 GBq/µmol) were obtained when the purification was performed by reverse phase HPLC in overall synthesis time <31 min. Purification using solid‐phase extraction offered lower radiochemical yield (27.6 ± 3.1%, decay‐corrected) and radiochemical purity (>95%) but higher specific activity (244 ± 18 GBq/µmol) in shorter reaction times (<21 min). These results, especially concerning radiochemical yield, significantly improve those previously reported in which the reaction was performed in a vial and the purification step was based on ionic chromatography. 相似文献
79.
Schroeder ET Wang Y Castaneda-Sceppa C Cloutier G Vallejo AF Kawakubo M Jensky NE Coomber S Azen SP Sattler FR 《The journals of gerontology. Series A, Biological sciences and medical sciences》2007,62(5):543-549
BACKGROUND: Maximal voluntary muscle strength (MVMS) and leg power are important measures of physical function in older adults. We hypothesized that performing these measures twice within 7-10 days would demonstrate a >5% increase due to learning and familiarization of the testing procedures. METHODS: Data were collected from three studies in older adult men (60-87 years) and were divided into two cohorts defined by study site and type of exercise equipment. MVMS was assessed in 116 participants using the one-repetition maximum method at two separate study visits for the chest press, latissimus pull-down, leg press, leg flexion, and leg extension exercises along with unilateral leg extension power. RESULTS: Test-retest scores were not different and did not exceed 0.8 +/- 9.0% in Cohort 1 or 2.3 +/- 9.8% in Cohort 2, except for leg extension, which improved by 6.6 +/- 14.4% (p <.009) and 3.4 +/- 6.8% (p <.016), respectively. Repeat tests were closely correlated with initial tests (all p <.001). Pearson correlation coefficients ranged from 0.74 for leg extension power to 0.96 for leg press. Coefficients of variation were <10% (4.2%-9.0%) for all exercises except for leg extension power, which was 15.5%. CONCLUSIONS: Our findings demonstrated that test-retest measures of MVMS and power in older adult men do not differ by more than 2.3% except for leg extension, and have relatively low coefficients of variation using data collected from three studies. Moreover, these findings were similar between two study sites using different equipment, which further supports the reliability of MVMS and power testing in older adult men. 相似文献
80.