全文获取类型
收费全文 | 3886篇 |
免费 | 253篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 143篇 |
妇产科学 | 65篇 |
基础医学 | 505篇 |
口腔科学 | 26篇 |
临床医学 | 281篇 |
内科学 | 979篇 |
皮肤病学 | 114篇 |
神经病学 | 202篇 |
特种医学 | 55篇 |
外科学 | 374篇 |
综合类 | 264篇 |
一般理论 | 3篇 |
预防医学 | 271篇 |
眼科学 | 73篇 |
药学 | 391篇 |
中国医学 | 22篇 |
肿瘤学 | 356篇 |
出版年
2022年 | 41篇 |
2021年 | 132篇 |
2020年 | 47篇 |
2019年 | 68篇 |
2018年 | 87篇 |
2017年 | 64篇 |
2016年 | 80篇 |
2015年 | 110篇 |
2014年 | 125篇 |
2013年 | 131篇 |
2012年 | 188篇 |
2011年 | 241篇 |
2010年 | 143篇 |
2009年 | 105篇 |
2008年 | 143篇 |
2007年 | 161篇 |
2006年 | 148篇 |
2005年 | 175篇 |
2004年 | 182篇 |
2003年 | 118篇 |
2002年 | 93篇 |
2001年 | 99篇 |
2000年 | 86篇 |
1999年 | 79篇 |
1997年 | 32篇 |
1996年 | 21篇 |
1993年 | 20篇 |
1992年 | 69篇 |
1991年 | 63篇 |
1990年 | 42篇 |
1989年 | 52篇 |
1988年 | 54篇 |
1987年 | 43篇 |
1986年 | 54篇 |
1985年 | 58篇 |
1984年 | 53篇 |
1983年 | 37篇 |
1982年 | 35篇 |
1981年 | 22篇 |
1979年 | 47篇 |
1978年 | 47篇 |
1977年 | 34篇 |
1976年 | 35篇 |
1975年 | 24篇 |
1974年 | 31篇 |
1973年 | 39篇 |
1972年 | 30篇 |
1971年 | 40篇 |
1970年 | 42篇 |
1969年 | 30篇 |
排序方式: 共有4150条查询结果,搜索用时 343 毫秒
91.
Goswami Rudra Prosad Sit Hiramanik Chatterjee Moumita Lahiri Debasish Sircar Geetabali Ghosh Parasar 《Clinical rheumatology》2021,40(3):1069-1076
Clinical Rheumatology - (1) Development and validation of a composite ultrasound score (cUSS) for the diagnosis of carpal tunnel syndrome (CTS). (2) To predict treatment response after local... 相似文献
92.
93.
Effect of loading conditions on Doppler-derived transmitral flow indices in normal subjects and patients with coronary artery disease 总被引:3,自引:0,他引:3
Tak T Choudhary RS Chatterjee S Widerhorn J Rahimtoola SH Chandraratna PA 《Echocardiography (Mount Kisco, N.Y.)》1992,9(5):467-474
The influence of alterations in preload and afterload on left ventricular diastolic filling using echocardiography was examined in nine normal volunteers (NLS) and nine patients (PTS) with coronary artery disease. The sequential interventions used were handgrip to increase afterload, nitroglycerin to decrease preload, and nifedipine to decrease afterload. Transmitral flow was measured using pulsed-Doppler echocardiography. Measurements were made pre- and post interventions. With increase in afterload using handgrip, the A and E wave velocities and the A/E ratio increased in both groups: 0.62 +/- 0.14 versus 0.86 +/- 0.17 in NLS; 0.75 +/- 0.45 versus 0.84 +/- 0.50 in PTS (P less than 0.05). Following administration of nitroglycerin to reduce preload, the A wave velocities increased, the E wave velocity decreased in both groups, and the A/E ratio increased 0.57 +/- 0.11 versus 0.67 +/- 0.13 in NLS; 0.78 +/- 0.40 versus 0.91 +/- 0.44 in PTS (P less than 0.05). Following use of nifedipine, the A and E wave velocities decreased in both groups with an increase in the A/E ratio in the patient group 0.83 +/- 0.13 versus 0.89 +/- 0.11 (P = NS). Thus, both normal subjects and patients with coronary artery disease had similar changes in Doppler-derived indices of left ventricular filling following interventions that changed left ventricular preload and afterload. 相似文献
94.
Chatterjee T Dixit A Mohapatra M Tyagi S Gupta PK Mishra P Bhattacharya M Karan AS Pati HP Saxena R Choudhry VP 《European journal of haematology》2004,73(2):93-97
Myelodysplastic syndromes (MDS) are clonal haematopoietic stem cell disorders characterised by ineffective and dyspoietic haematopoiesis. The natural history of these disorders is variable and ranges from a chronic to a rapid course towards leukaemic progression. Certain shortcomings have been encountered in the French-American-British (FAB) classification over the years, and therefore there is a need for an alternative method of classification. In 1999, the WHO published a revised classification of MDS. In the present study, we have analysed the clinical, haematological and histomorphological features in 96 cases of primary MDS seen in the department of haematology at the All India Institute of Medical Sciences (AIIMS) over a 6-yr period (1996-2001). Both FAB and WHO classifications have been incorporated and the Bournemouth scoring system applied in each case at presentation. The Bournemouth scoring system, in the absence of a cytogenetic study, offers a good prognostication and long-term survival estimate. 相似文献
95.
96.
Intravenous and oral prenalterol in congestive heart failure. Effects on systemic and coronary hemodynamics and myocardial catecholamine balance 总被引:1,自引:0,他引:1
D W Wahr K Swedberg M Rabbino M J Hoyle D Curran W W Parmley K Chatterjee 《The American journal of medicine》1984,76(6):999-1005
Systemic and coronary hemodynamic effects of prenalterol, a beta-1 receptor agonist, were determined in patients with chronic congestive heart failure, initially after intravenous administration (10 patients) and then after oral administration (eight patients). Cardiac index increased by 33 percent and 30 percent after intravenous and oral prenalterol, respectively. The increase in stroke volume index and stroke work index and decrease in pulmonary capillary wedge pressure and systemic vascular resistance were not significant. Myocardial oxygen consumption and coronary sinus blood flow increased in the majority of patients, although these changes were not statistically significant. There were no significant changes in transmyocardial norepinephrine or epinephrine balance. The systemic and coronary hemodynamic effects of both intravenous and oral prenalterol were similar. Major side effects included sudden death (two patients) and hypotension and bradycardia (three patients) during oral prenalterol treatment. It is concluded that improved left ventricular function following both intravenous and oral prenalterol may be associated with increased myocardial oxygen consumption, and serious adverse effects may occur during prenalterol therapy. 相似文献
97.
98.
Angele Martins Claudia Koch Mitali Joshi Roberta Pinto Paulo Passos 《Anatomical record (Hoboken, N.J. : 2007)》2021,304(10):2149-2182
99.
100.
Snigdha Roy Barman Imran Khan Subhodeep Chatterjee Subhajit Saha Dukhyun Choi Sangmin Lee Zong-Hong Lin 《Yao wu shi pin fen xi = Journal of food and drug analysis.》2020,28(4):595
Digital microfluidic (DMF) platforms have contributed immensely to the development of multifunctional lab-on-chip systems for performing complete sets of biological and analytical assays. Electrowetting-on-dielectric (EWOD) technology, due to its outstanding flexibility and integrability, has emerged as a promising candidate for such lab-on-chip applications. Triggered by an electrical stimulus, EWOD devices allow precise manipulation of single droplets along the designed electrode arrays without employing external pumps and valves, thereby enhancing the miniaturization and portability of the system towards transcending important laboratory assays in resource-limited settings. In recent years, the simple fabrication process and reprogrammable architecture of EWOD chips have led to their widespread applications in food safety analysis. Various EWOD devices have been developed for the quantitative monitoring of analytes such as food-borne pathogens, heavy metal ions, vitamins, and antioxidants, which are significant in food samples. In this paper, we reviewed the advances and developments in the design of EWOD systems for performing versatile functions starting from sample preparation to sample detection, enabling rapid and high-throughput food analysis. 相似文献