全文获取类型
收费全文 | 165702篇 |
免费 | 6313篇 |
国内免费 | 356篇 |
专业分类
耳鼻咽喉 | 2209篇 |
儿科学 | 4783篇 |
妇产科学 | 3885篇 |
基础医学 | 23941篇 |
口腔科学 | 5403篇 |
临床医学 | 9491篇 |
内科学 | 36544篇 |
皮肤病学 | 4510篇 |
神经病学 | 13311篇 |
特种医学 | 4013篇 |
外国民族医学 | 1篇 |
外科学 | 19012篇 |
综合类 | 795篇 |
一般理论 | 25篇 |
预防医学 | 19816篇 |
眼科学 | 4381篇 |
药学 | 12920篇 |
中国医学 | 663篇 |
肿瘤学 | 6668篇 |
出版年
2023年 | 832篇 |
2022年 | 591篇 |
2021年 | 2527篇 |
2020年 | 1415篇 |
2019年 | 2877篇 |
2018年 | 5012篇 |
2017年 | 3110篇 |
2016年 | 3115篇 |
2015年 | 3485篇 |
2014年 | 3822篇 |
2013年 | 5822篇 |
2012年 | 10186篇 |
2011年 | 10760篇 |
2010年 | 5265篇 |
2009年 | 3819篇 |
2008年 | 8786篇 |
2007年 | 9453篇 |
2006年 | 9079篇 |
2005年 | 8661篇 |
2004年 | 8023篇 |
2003年 | 7543篇 |
2002年 | 7167篇 |
2001年 | 4902篇 |
2000年 | 5496篇 |
1999年 | 4179篇 |
1998年 | 706篇 |
1992年 | 2228篇 |
1991年 | 1998篇 |
1990年 | 1998篇 |
1989年 | 1691篇 |
1988年 | 1616篇 |
1987年 | 1514篇 |
1986年 | 1556篇 |
1985年 | 1455篇 |
1984年 | 1043篇 |
1983年 | 897篇 |
1979年 | 1214篇 |
1978年 | 810篇 |
1977年 | 784篇 |
1976年 | 748篇 |
1975年 | 882篇 |
1974年 | 1126篇 |
1973年 | 1170篇 |
1972年 | 1121篇 |
1971年 | 1083篇 |
1970年 | 1014篇 |
1969年 | 1085篇 |
1968年 | 1111篇 |
1967年 | 983篇 |
1966年 | 883篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
PTH fragments consisting of the C-terminal portion of the molecule may have biologic effects and may modify the actions of PTH. Evidence for the presence of a C-terminal PTH receptor further supports a biologic role for such fragments. Because C-PTH fragments accumulate in patients with renal insufficiency, it is possible that they may contribute to renal bone disease. The precise role of circulating C-PTH fragments in the pathogenesis, diagnosis, and management of renal osteodystrophy, however, remains to be determined. Future studies of the biologic effects and regulation of these fragments may lead to better understanding of skeletal biology and may also improve our approach to the diagnosis and treatment of renal bone disease. 相似文献
102.
Expression of activation molecules in neutrophils, monocytes and lymphocytes from patients with unstable angina treated with stent implantation. 总被引:1,自引:0,他引:1
Víctor Sánchez-Margalet José M Cubero Consuelo Martín-Romero José Cubero José M Cruz-Fernández Raimundo Goberna 《Clinical chemistry and laboratory medicine》2004,42(3):273-278
Coronary angioplasty is known to mediate an inflammatory response. Recently, we have characterized the transient systemic inflammatory response after coronary stent implantation in patients with unstable angina by measuring different soluble protein markers. In the present study we have characterized the expression of various cellular activation markers in neutrophils, monocytes and lymphocytes from the same group of patients. Peripheral blood samples were taken before and 24 h, 48 h and 7 days after successful coronary stenting in 58 patients. Cell surface markers (CD11b/CD18 and CD38) were analyzed by flow cytometry to determine the activation of neutrophils, monocytes and T lymphocytes. We found that coronary angioplasty with stent implantation produces an increase in the cell surface expression of CD11b/CD18 in neutrophils and CD38 in monocytes, following a similar time-course with a peak after 24 h, returning to basal levels after 48 h and a second peak after 7 days. However, T lymphocytes were not found to be activated. These results suggest that coronary stent implantation induces a different pattern inducing soluble and cellular inflammation markers, and therefore, they should be taken into account in patients undergoing stent implantation to study clinical correlations. 相似文献
103.
104.
105.
106.
107.
108.
Carlos Ferrer Albiach Antonio Conde Moreno Marta Rodríguez Cordón Virginia Morillo Macías Ana Bouché Babiloni Inmaculada Beato Tortajada Ángel Sánchez Iglesias Alicia Francés Muñoz 《Clinical & translational oncology》2010,12(1):22-26
Hypoxia is related to poor prognosis because it is associated to chemo-and radioresistance. During recent years the evolution
of imaging methods like PET/CT and MRI has meant the appearance of new perspectives with direct implications in radiation
therapy. We discuss previous experiences in staging, planning and in the follow-up process with these techniques for measuring
tumour hypoxia. 相似文献
109.
110.
Levente Gáspár Zoltán Jónás László Kiss György Vereb Zoltán Csernátony 《European journal of orthopaedic surgery & traumatology : orthopedie traumatologie》2009,19(6):403-407
Background Coccygodynia can cause severe pain and disability in patients. There are contradictions in the literature regarding the final
results of coccygectomy for coccygodynia. We evaluated the long-term effects of coccygectomy on the intensity, characteristics,
and manifestation of pain caused by coccygodynia to determine the adequacy of operation among treatment modalities.
Materials and methods Thirty-four patients with coccygodynia were treated by coccygectomy. In 22 cases, trauma, and in one case childbirth was the
cause. 11 cases were regarded as idiopathic. The intensity, characteristics of pain, and the most painful activities were
evaluated at an average of 7.6 (3–18) years of follow-up time.
Results Before the operation, all 34 patients had pain while sitting, moreover, 26 of them had pain during standing, walking, at night
or a combination of these. 21 patients had intolerable or very intensive, mainly acute, sharp or burning pain. 11 patients
had dyschesia, 2 had dysuria and 6 had dyspareunia. At follow-up, 7 patients were completely free of pain, 15 others had moderate,
11 medium, and only one patient had severe, but none had intolerable pain. Only seven patients had acute, sharp or burning
pain postoperatively. The decrease of average pain score from 8.0 to 3.2 was significant (P < 10−12). The number of the patients with dyschesia and dyspareunia decreased from 11 to 7 and from 6 to 3, respectively. Two patients
had dysuria, but their complaints did not change after the operation. One of the two patients who needed reoperation had an
excellent final result, while the other remained unchanged. 12 and 16 patients (together 82%) regarded the final result of
the operation excellent and good, respectively. The condition of five others did not change, while one became worse. The patients
with younger age, smaller body mass index, and less co-morbidities had better final result. There were no serious complications.
Conclusion Coccygectomy for coccygodynia is a safe method to decrease the intensity of pain and other complaints of the patients. The
operation can be the choice of treatment if conservative measures fail. 相似文献