首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   208篇
  免费   8篇
各国政治   24篇
工人农民   18篇
世界政治   10篇
外交国际关系   9篇
法律   115篇
政治理论   40篇
  2020年   3篇
  2019年   8篇
  2018年   7篇
  2017年   9篇
  2016年   3篇
  2015年   6篇
  2014年   3篇
  2013年   22篇
  2012年   4篇
  2011年   5篇
  2010年   2篇
  2009年   5篇
  2008年   17篇
  2007年   11篇
  2006年   10篇
  2005年   7篇
  2004年   8篇
  2003年   6篇
  2002年   6篇
  2001年   10篇
  2000年   3篇
  1999年   2篇
  1998年   2篇
  1997年   3篇
  1996年   3篇
  1995年   4篇
  1994年   1篇
  1993年   3篇
  1992年   2篇
  1991年   1篇
  1990年   2篇
  1989年   4篇
  1988年   1篇
  1987年   2篇
  1986年   2篇
  1985年   1篇
  1984年   3篇
  1983年   2篇
  1982年   2篇
  1981年   2篇
  1980年   4篇
  1979年   2篇
  1978年   3篇
  1977年   2篇
  1976年   3篇
  1972年   2篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
排序方式: 共有216条查询结果,搜索用时 15 毫秒
91.
92.
The concentrations of 3‐beta‐hydroxybutyrate (3HB) in femoral blood, urine, vitreous humor as well as pericardial and cerebrospinal fluids were retrospectively examined in a series of medico‐legal autopsies, which included cases of diabetic ketoacidosis, hypothermia fatalities without ethanol in blood, bodies presenting mild decompositional changes, and sudden deaths in chronic alcoholics. Similar increases in 3HB concentrations were observed in blood, vitreous, and pericardial fluid, irrespective of the cause of death, suggesting that pericardial fluid and vitreous can both be used as alternatives to blood for postmortem 3HB determination. Urine 3HB levels were higher than blood values in most cases. Cerebrospinal fluid 3HB levels were generally lower than concentrations in blood and proved to be diagnostic of underlying metabolic disturbances only when significant increases occurred.  相似文献   
93.
In recent years, scopolamine has become a drug of common use for recreational and predatory purposes and several ways of administration have been devised. A method for the rapid analysis of suspicious samples was developed, using a portable capillary electrophoresis with contactless conductivity detection. The method allows the separation of scopolamine from atropine which has a similar structure and is present along with scopolamine in some samples. The method was demonstrated to be useful for the fast analysis of several types of evidential items which have recently been reported to have been abused with fatal consequences or employed for criminal purposes. An infusion of Datura stramonium L., in which scopolamine and atropine naturally coexist, was analyzed for being frequently consumed for recreational purposes. A spiked moisturizing cream and six spiked alcoholic beverages were also analyzed. In spite of the complexity of the specimens, the sample pre-treatment methods developed were simple and fast.  相似文献   
94.
95.
Within the initial step of the forensic DNA analysis process, the DNA extraction efficiency and especially the removal of potential PCR inhibitors is crucial for subsequent steps, e.g. quantification by real-time PCR and amplification of short tandem repeats (STRs). The protocol of the PrepFiler™ Forensic DNA Extraction Kit was optimized for the application on a Tecan liquid handling workstation Freedom EVO® 150. This modified application of the PrepFiler™ technology was compared with respect to DNA yield, sensitivity and the ability to remove potential PCR inhibitors to an established routine method working on the same liquid handling workstation based on ChargeSwitch® Technology (CST) from Invitrogen.  相似文献   
96.
The abundance of, and reliance upon, human electro‐muscular incapacitation (HEMI) devices, especially in law enforcement, has generated scrutiny and examination of these technologies. The purpose of this study was to examine cardiovascular effects resulting from typical (5 sec) and longer activation (20 sec) HEMI applications studying myocardial function and peripheral vascular system using a combination of invasive cardiovascular catheters and transesophageal echocardiography (TEE). Six healthy swine (Sus scrofa) 3–5 months in age and weighing between 60 and 86 kg were anesthetized and exposed to the TASER Model X26 waveform while transesophageal echocardiography was performed. Stroke volume was shown to statistically decrease during HEMI application indicating an increase in systemic vascular resistance, but HEMI application did not result in myocardial dysfunction (“cardiac stunning”).  相似文献   
97.
98.
99.
Abstract: The present paper analyses, from an economic point of view, the changes in the economic constitution of the European Community since its foundation in 1958. In order to identify the various changes, we start by developing an economic frame of reference. Our proposition is that the constitution of the European Community (EC) came closest to this frame of reference: an economic constitution for a market system. In the subsequent parts, we try to show that the process of European integration was largely based on the introduction of non-market elements. Our final argument will be that as far as the economic constitution is concerned, the Treaty on European Union (TEU) is dominated by traits which are Characteristic of modern welfare states.  相似文献   
100.
Institutional theory of law (ITL) reflects both continuity and change of Kelsen's legal positivism. The main alteration results from the way ITL extends Hart's linguistic turn towards ordinary language philosophy (OLP). Hart holds – like Kelsen – that law cannot be reduced to brute fact nor morality, but because of its attempt to reconstruct social practices his theory is more inclusive. By introducing the notion of law as an extra-linguistic institution ITL takes a next step in legal positivism and accounts for the relationship between action and validity within the legal system. There are, however, some problems yet unresolved by ITL. One of them is its theory of meaning. An other is the way it accounts for change and development. Answers may be based on the pragmatic philosophy of Charles Sanders Peirce, who emphasises the intrinsic relation between the meaning of speech acts and the process of habit formation.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号