全文获取类型
收费全文 | 1156篇 |
免费 | 47篇 |
国内免费 | 147篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 61篇 |
妇产科学 | 7篇 |
基础医学 | 86篇 |
口腔科学 | 21篇 |
临床医学 | 196篇 |
内科学 | 313篇 |
皮肤病学 | 30篇 |
神经病学 | 17篇 |
特种医学 | 306篇 |
外科学 | 54篇 |
综合类 | 32篇 |
预防医学 | 53篇 |
眼科学 | 13篇 |
药学 | 112篇 |
1篇 | |
肿瘤学 | 47篇 |
出版年
2023年 | 2篇 |
2021年 | 3篇 |
2020年 | 4篇 |
2019年 | 8篇 |
2018年 | 15篇 |
2017年 | 6篇 |
2016年 | 8篇 |
2015年 | 12篇 |
2014年 | 16篇 |
2013年 | 36篇 |
2012年 | 18篇 |
2011年 | 28篇 |
2010年 | 32篇 |
2009年 | 48篇 |
2008年 | 30篇 |
2007年 | 120篇 |
2006年 | 25篇 |
2005年 | 39篇 |
2004年 | 12篇 |
2003年 | 6篇 |
2002年 | 20篇 |
2001年 | 23篇 |
2000年 | 15篇 |
1999年 | 25篇 |
1998年 | 81篇 |
1997年 | 80篇 |
1996年 | 72篇 |
1995年 | 63篇 |
1994年 | 44篇 |
1993年 | 54篇 |
1992年 | 15篇 |
1991年 | 22篇 |
1990年 | 17篇 |
1989年 | 54篇 |
1988年 | 42篇 |
1987年 | 34篇 |
1986年 | 31篇 |
1985年 | 26篇 |
1984年 | 20篇 |
1983年 | 12篇 |
1982年 | 27篇 |
1981年 | 14篇 |
1980年 | 14篇 |
1979年 | 7篇 |
1978年 | 5篇 |
1977年 | 16篇 |
1976年 | 28篇 |
1975年 | 13篇 |
1973年 | 2篇 |
1972年 | 2篇 |
排序方式: 共有1350条查询结果,搜索用时 0 毫秒
61.
HPLC测定益肤霜中红霉素和地塞米松的含量 总被引:5,自引:0,他引:5
采用HPLC测定益肤霜中红霉素和地塞米松的含量,控制制剂的质量。色谱条件:固定相为Kromasil C18柱;流动相为乙腈-0.2mol/L醋酸铵-水,流速0.8ml/min;检测波长215nm。以c对峰面积A作直线回归,红霉素在1.5-24g/L地塞米松在20-300mg/L的范围内,其浓度与峰面积呈直线关系。红霉素回收率为99.69%;地塞米松的回收率为100.28%。本法操作简便,结果准确, 相似文献
62.
63.
Concepts necessary to an understanding of the basics of quality assurance audits are presented. Included are specific examples that bridged theory and practice by applying the protocol to a real-life diagnostic imaging situation. This method meets the present requirements of the Joint Commission of the Accrediation of Hospitals. 相似文献
64.
65.
The State University Downstate Medical Center initiated a Master of Public Health (MPH) degree program in July 2001 following
planning efforts that began in 1995. Twelve Students entered the program in June 2002. Currently, eighty students are enrolled
in the program and eighteen have graduated from it in 2004 and 2005. With an initial focus on urban and immigrant health,
the program aims to train public health professionals who can assist in addressing through population-based interventions
the health issues of Brooklyn’s 2,465,326 people, of whom 38.5% are immigrants to the United States. Starting with four courses
in the summer 2002 semester, the program now offers twenty-four courses over the three semesters of the academic year. The
program is housed in the Department of Preventive Medicine and Community Health of the College of Medicine and is part-time
in nature for most students. In addition to completing required course work, students must also complete a 250-hour practicum
experience in which they apply theoretical knowledge in a public health practice setting. Student practicum experiences play
a vital role in linking the program to communities and serve as conduits for the initiation of further community based collaboratives.
This article describes the challenges encountered in initiating an MPH program in an academic medical center, the importance
of both intramural and community support to its success, and the vital role it plays in addressing the health issues of various
communities. The program became a leading priority of the Strategic Plan of the Downstate Medical Center in 2000, and received
the full support of Downstate’s then new president, Dr. John C. LaRosa. This prioritization and support proved essential to
the rapid development of the program. The Downstate MPH program offers a concurrent degree to medical students who are able
to complete both degrees in a four year period. The Alumni Fund of the College of Medicine provides each MD/MPH student with
a one-time scholarship which covers a quarter of the MPH tuition. Concurrent MPH degrees are also offered for graduate students
enrolled in occupational therapy, nursing, and several other health programs. The Council on Education for Public Health (CEPH)
conducted an accreditation site visit of the Downstate MPH program in December 2004. On June 10, 2005, the CEPH Board accredited
the program for 5 years.
Pascal James Imperato, MD, MPH & TM is Distinguished Service Professor and Chair, Department of Preventive Medicine and Community
Health and Director of the Master of Public Health Program, SUNY Downstate Medical Center; Judith H. LaRosa, PhD, RN is Professor
of Preventive Medicine and Community Health and Deputy Director of the Master of Public Health Program, SUNY Downstate Medical
Center; Leslie Schechter, MA is the Administrator for the Department of Preventive Medicine and Community Health and the Master
of Public Health Program, SUNY Downstate Medical
Center. 相似文献
66.
An in vitro is described that attempts to detect patients with a potential for adverse systemic reactions to contrast material. This test involves measuring the rate of conversion of prekallikrein to kallikrein under certain standard conditions. In a preliminary retrospective study, the test could be used to identify such patients with a sensitivity of 88%, a specificity of 82%, and a predictive value of 79%. 相似文献
67.
68.
Excel97在药物分析中的应用 总被引:1,自引:0,他引:1
目的:在药物分析中,电子表格软件MicrosoftExce197for Windows。方法:利用Excel的数据处理功能,进行药物的图表绘制、数据计算和统计处理,回归分析,特别是计算分析,并可建立分析数据库。结果和结论:Excel操作简单,功能强大,数据分析工作直观。 相似文献
69.
目的:比较国产辛伐他汀与进口辛伐他汀治疗原发性高胆固醇血症的疗效及安全性。方法:采用开放区组随机对照、多中心的临床设计。150例高胆 固醇血症病人分为验证组(50例)、对照组(48例)和开放组(52例),剂量均为每晚顿服10mg,服药8周。结果:验证组与对照组服药前后比较,血清总胆 固醇(TC)分别降低26.36%和28.3%,低密度脂蛋白胆固醇(LDL-C)分别降低33.17%和35.51%;验 相似文献
70.
Diet and cancer prevention: the fiber first diet 总被引:3,自引:0,他引:3
Diet can play a major role in cancer prevention. The international
differences in cancer incidence are largely accounted for by lifestyle
practices that include nutrition, exercise, and alcohol and tobacco use.
About 50% of cancer incidence and 35% of cancer mortality in the U.S.,
represented by cancers of the breast, prostate, pancreas, ovary,
endometrium, and colon, are associated with Western dietary habits. Cancer
of the stomach, currently a major disease in the Far East, relates to
distinct, specific nutritional elements such as excessive salt intake. For
these cancers, information is available on possible initiating genotoxic
factors, promoting elements, and prophylactic agents. In general, the
typical diet in the United States contains low levels of the potent
carcinogenic agents, heterocyclic amines, formed during the cooking of
meats. It provides only about half the potent appropriate fiber intake and
is high in calories. About twice as many calories as would be desirable
come from fat, certain kinds of which enhance the development of cancers.
Other foods with functional properties, such as soy products and tea, can
be beneficial. To achieve reduction in risk of certain cancers, diet must
be optimized, primarily to reduce caloric intake and the fat component. The
latter should be 20% or less of total caloric intake and fiber should be
increased to 25- 35 g per day for adults. One approach to achieving these
goals is the Fiber First Diet, a diet designed around adequate fiber intake
from grains, especially cereals, vegetables, legumes, and fruits, which
thereby reduces both calorie and fat intake. Such dietary improvements will
not only reduce cancer and other chronic disease risks, but will contribute
to a healthy life to an advanced age. A corollary benefit is a lower cost
of medical care.
相似文献