全文获取类型
收费全文 | 363篇 |
免费 | 20篇 |
专业分类
各国政治 | 24篇 |
工人农民 | 25篇 |
世界政治 | 49篇 |
外交国际关系 | 31篇 |
法律 | 157篇 |
中国政治 | 1篇 |
政治理论 | 94篇 |
综合类 | 2篇 |
出版年
2023年 | 5篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 7篇 |
2018年 | 16篇 |
2017年 | 15篇 |
2016年 | 21篇 |
2015年 | 6篇 |
2014年 | 6篇 |
2013年 | 78篇 |
2012年 | 12篇 |
2011年 | 8篇 |
2010年 | 13篇 |
2009年 | 9篇 |
2008年 | 17篇 |
2007年 | 11篇 |
2006年 | 13篇 |
2005年 | 14篇 |
2004年 | 11篇 |
2003年 | 4篇 |
2002年 | 4篇 |
2001年 | 8篇 |
2000年 | 9篇 |
1999年 | 11篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 5篇 |
1993年 | 3篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 7篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1974年 | 5篇 |
1973年 | 3篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有383条查询结果,搜索用时 15 毫秒
41.
The 1H nuclear magnetic resonance (NMR) chemical shifts and coupling constants of heroin's D ring H-15 alpha, H-15 beta, and H-16 alpha, and H-16 beta are presented. These assignments were accessible through the introduction of a double bond (delta 15,16) in heroin. The resulting compound, delta 15,16 didehydroheroin, was subjected to deuterium exchange or stereoselective reduction or both. Reduced products d1-16 alpha heroin d2-15 alpha, 15 beta-heroin, and d3-15 alpha, 15 beta, 16 alpha-heroin are presented. Heroin with deuterated acetyls is also presented for 1H NMR spectral clarity in the D ring area. 相似文献
42.
43.
Nations of the Third World are not developing as quickly as their potential suggests they should. This article posits that one of the major reasons for this lack of development is a scarcity of trained public managers. Teaching citizens of developing countries public administration presents a special challenge. The authors point out that the emphasis in training these individuals should be placed on practical learning. In addition, curriculum should not be based solely on the American model, but should recognize the cultural and economic dissimilarities that exist. The authors close the article by suggesting some possible training approaches for developing nations. 相似文献
44.
45.
T Cooper 《American journal of law & medicine》1976,2(2):257-262
In this Article, Theodore Cooper, M.D., Assistant Secretary for Health at HEW, contends that the crush of lawsuits brought by aggrieved health care consumers against medical professionals and institutions, and drug and medical equipment manufacturers, may be the result, in large part, of a widely held impression--often encouraged by members of the health professions and industries themselves--that medicine has unlimited powers to heal. Dr. Cooper suggests that those involved in providing health care services and products--and members of the legal profession-have a responsibility to inform the public that this expectation is unrealistic and that everyone suffers when the number of such lawsuits and the size of damage awards are excessive. 相似文献
46.
47.
Cooper D 《Journal of law and medicine》2006,14(1):27-44
In 2005 a Legislation Review Committee, known as the Lockhart Review, undertook a review of the Commonwealth legislation regulating human embryo research. The report that emanated from the review was released in December 2005. If the report recommendations are implemented by the Federal Government, Australian scientists will be permitted to create human embryo entities currently known as "human embryo clones" by the process known as somatic cell nuclear transfer to develop stem cell lines for research purposes. Many argue that stem cells have the potential to be developed into valuable medical therapies that could assist with, or cure, serious diseases such as Type 1 diabetes and Parkinson's disease. This article analyses the evidence presented to the Lockhart Review and the report recommendations. It assesses where the Lockhart recommendations would place Australia in terms of worldwide embryo research. It is argued that the Federal Government should fully embrace the recommendations so that Australia can progress stem cell research to its fullest potential. 相似文献
48.
49.
The purpose of this study was to determine the performance characteristics of the Cozart Amphetamine Microplate EIA for detecting amphetamine in oral fluid. Oral fluid samples were collected using the Cozart RapiScan Collection System from 135 volunteer donors from drug treatment clinics. A further 35 oral fluid samples were collected from volunteer donors who were not drug users. The samples were analyzed in the laboratory using the Cozart Amphetamine Microplate EIA and confirmed using gas chromatography-mass spectrometry (GC-MS). The samples were stored frozen until analysis by GC-MS. The intra-assay precision for the Cozart Amphetamine Microplate EIA for amphetamine in oral fluid over forty assays was 2.74-7.1% CV (within assay) and 3.4-7.0% CV (within day). A total of 78 samples were positive for various amphetamines and related designer drugs. The Cozart Amphetamine Microplate EIA, using a cutoff of 45 ng/ml amphetamine equivalents in neat oral fluid, had a sensitivity of 91.7+/-3.3% and a specificity of 95.9+/-1.9% versus GC-MS using a cutoff of 30 ng/ml. A series of potential adulterants of oral fluid were evaluated and shown not to alter the outcome of the test result. 相似文献
50.
Travis AR Johnson LJ Milroy CM 《The American journal of forensic medicine and pathology》2007,28(4):314-318
Homicide-suicide forms a distinct form of homicide. An analysis of cases in the Yorkshire and Humberside region of England between 1991 and 2005 revealed 37 episodes with 42 victims. Previous studies have shown a high rate of use of firearms. Over the last 2 decades firearms legislation has become more restrictive. In this study all assailants were male, mean age 46.8 years. The commonest method of homicide was strangulation (36%) with 16% killed by firearms. This is a reduction compared with a previous study in the same region. All killers who shot their victims killed themselves with firearms. There were no multiple killings with firearms in this study and no stranger killings. Hanging was the commonest method of suicide. During the same period the use of firearms as a method of homicide increased in England and Wales with handguns, the most common weapon. Nationally, suicide after homicide has remained at a similar rate over the half century and is an uncommon phenomenon. Firearms use remains low in both homicide and homicide-suicide episodes in England, and further analysis is required to determine changes in patterns of killing. 相似文献