全文获取类型
收费全文 | 123790篇 |
免费 | 1928篇 |
国内免费 | 239篇 |
专业分类
教育 | 85335篇 |
科学研究 | 13666篇 |
各国文化 | 2070篇 |
体育 | 9996篇 |
综合类 | 173篇 |
文化理论 | 1156篇 |
信息传播 | 13561篇 |
出版年
2021年 | 973篇 |
2020年 | 1737篇 |
2019年 | 2691篇 |
2018年 | 3318篇 |
2017年 | 3571篇 |
2016年 | 3593篇 |
2015年 | 2431篇 |
2014年 | 3295篇 |
2013年 | 28078篇 |
2012年 | 2568篇 |
2011年 | 2976篇 |
2010年 | 2481篇 |
2009年 | 2709篇 |
2008年 | 2578篇 |
2007年 | 2294篇 |
2006年 | 2521篇 |
2005年 | 2496篇 |
2004年 | 3148篇 |
2003年 | 2488篇 |
2002年 | 2280篇 |
2001年 | 2207篇 |
2000年 | 1827篇 |
1999年 | 1699篇 |
1998年 | 1421篇 |
1997年 | 1395篇 |
1996年 | 1608篇 |
1995年 | 1420篇 |
1994年 | 1397篇 |
1993年 | 1384篇 |
1992年 | 1451篇 |
1991年 | 1360篇 |
1990年 | 1371篇 |
1989年 | 1282篇 |
1988年 | 1124篇 |
1987年 | 1067篇 |
1986年 | 1084篇 |
1985年 | 1325篇 |
1984年 | 1204篇 |
1983年 | 1120篇 |
1982年 | 1115篇 |
1981年 | 1038篇 |
1980年 | 994篇 |
1979年 | 1119篇 |
1978年 | 1072篇 |
1977年 | 976篇 |
1976年 | 892篇 |
1975年 | 729篇 |
1974年 | 723篇 |
1973年 | 694篇 |
1972年 | 526篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Fadhaa A. Ghafil Bassim I. Mohammad Hussain S. Al-Janabi Najah R. Hadi Hayder A. Al-Aubaidy 《Indian journal of clinical biochemistry : IJCB》2021,36(1):81
Genetic variation in the angiotensin II type 1 receptor (AT1R) has an important effect on the outcome of acute coronary syndrome (ACS) initiated treatment with captopril. This study aims to investigate the impact of genetic polymorphism of AT1R (rs5186 and rs275651) on the ACS outcome in Iraqi patients treated with captopril. A total of 250 Iraqi individuals with ACS were included in this case—control study and they were divided into two study groups; Study group 1 included 125 participants who were prescribed captopril, 25 mg twice daily and study group 2 included 125 participants who received no captopril as part of their ACS treatment (control study). The AT1R gene (rs5186) CC genotype was found to be associated with ST-elevation myocardial infarction (STEMI) (Odd’s ratio (O.R) = 1.2, P = 0.7), while AC was associated with Non-ST-elevation myocardial infarction (NSTEMI) and unstable angina (UA) (O.R = 1.2, P = 0.8). AC genotype is more prone to have Percutaneous coronary intervention (PCI) after ACS attack (O.R = 1.2, P = 0.6). CC genotype had a risk to get less improvement (O.R = 1.6, P = 0.5), so might require higher doses of captopril during acute coronary insult. The AT1R gene (rs275651) AA genotype was associated with UA (O.R = 1.3, P = 0.9). AA and AT genotypes were more prone to have PCI after ACS attack (O.R = 3.9 P = 0.2, O.R = 3.5, P = 0.3 respectively) and thus requiring higher doses of captopril. We conclude that the AT1R rs5186, rs275651 genetic polymorphisms might partially affect the clinical outcome of ACS patients treated with captopril and might have captopril resistance which requires higher doses. 相似文献
22.
Mirjam A. Twigt 《Popular Communication》2019,17(2):171-184
ABSTRACTFor many forcefully displaced people worldwide, notions around one’s sense of “home” and “place” in the world are perpetually unsettled. This article explores how digital technologies interact with embodied, material experiences within the geographical location refugees are residing in. Empirical examples from ethnographic research conducted among Iraqi urban refugees, living in prolonged uncertainty in Jordan, shows how situated experiences of legal, material, and social uncertainty reinforce particular mediated socialities. Pivotal studies have shown how digital connections engender virtual home-making practices and a wide variety of connected presences. This study points to the other side of the same coin: the cultivation of “absent presence.” “Absent presence” refers to feelings—the ambivalence that experiences of prolonged displacement bring about—but also to active disengagement and affective tactics in response. These engender a further separation from the physical world where forced migrants are not deemed welcome. 相似文献
23.
24.
Michael J. Mouat 《Journal of Cultural Economy》2018,11(4):315-329
According to its proponents, animal-free animal food products, such as cultured meat and synthetic cow’s milk, have the potential to overcome various environmental, health and ethical challenges that have emerged around global animal product consumption and the industrial agriculture that is needed to support it. Apart from the myriad of technical problems making animal-free food products, critics have pointed out the blurry ontological status of the food and the ethical challenges therein, and have questioned the veracity of the various promissory narratives being produced. This paper considers animal-free food from a social studies of economies and markets (SSEM) perspective. As a market that currently mostly only exists in potential, an SSEM perspective can reveal the various social and material relations that comprise the (bio)capital formation that will underpin any market-to-be, an aspect of markets that are often invisible once markets are up and running. Moreover, this perspective details the intimate role markets have in establishing the ethical and ontological aspects of animal-free foods in a political economy shaped by neoliberalisation and financialisation. 相似文献
25.
26.
Sally O. Hastings Trudy Milburn 《Journal of International and Intercultural Communication》2019,12(2):190-207
ABSTRACTOlfaction has been described as one of the least studied of the senses. This has certainly proven true in Communication. This project applies Ethnography of Communication and Cultural Discourse Analysis to examine the role that olfaction plays in the cultural meaning systems of two speech communities: residents surrounding the Gowanus Canal and bereaved parents. The cultural hub used to explore the cultural significance of olfaction in both speech communities is feeling. The analyses illustrate how emotions are tied to associated sensations and further become activated through radiants of dwelling, relating and acting. The analysis also shows how olfaction may serve to unify and separate members of a community. The significance of this research encourages stretching the boundaries of communication studies by examining the less studied physical senses and the boundaries of Cultural Discourse Analysis by providing distinctions that others can incorporate when examining feelings. 相似文献
27.
A. Miller 《Journal of Web Librarianship》2019,13(2):127-155
The emerging creative practices of digital collections are increasing in prominence thanks to the access to, and appeal of, data visualizations. Interactive data visualizations, such as a map, timeline, chart, graph, or artist’s rendering of data, enable users to pursue their own research interests within a collection and participate in new areas of research. Use of these data visualizations enhances the scope of the collection and enables a modern and diverse thematic collection to emerge. This article considers the question: Does the addition of data visualizations affect how users participate with a research collection? Impacts on collection development, application of user-centered design, and analysis of users’ exploratory strategies are discussed. Examples of data visualizations used in digital humanities projects and digital collections are presented as case studies. 相似文献
28.
Cultural Studies of Science Education - The retention of underrepresented students remains a significant challenge in the STEM (Science, Technology, Engineering and Math) disciplines. A broad range... 相似文献
29.
30.