全文获取类型
收费全文 | 97篇 |
免费 | 1篇 |
专业分类
教育 | 56篇 |
科学研究 | 36篇 |
各国文化 | 1篇 |
体育 | 2篇 |
综合类 | 1篇 |
信息传播 | 2篇 |
出版年
2021年 | 1篇 |
2019年 | 2篇 |
2018年 | 2篇 |
2017年 | 2篇 |
2016年 | 6篇 |
2015年 | 5篇 |
2014年 | 14篇 |
2013年 | 11篇 |
2012年 | 6篇 |
2011年 | 7篇 |
2010年 | 2篇 |
2009年 | 5篇 |
2008年 | 3篇 |
2007年 | 1篇 |
2006年 | 3篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 4篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1979年 | 1篇 |
1978年 | 2篇 |
排序方式: 共有98条查询结果,搜索用时 31 毫秒
31.
32.
Asma Ahmed Banishree Saha Anand Patwardhan Shwetha Shivaprasad Dipankar Nandi 《Resonance》2009,14(6):610-621
Our immune system, by and large, does a fine job in protecting us from opportunistic and infectious microbes, potential carcinogens and allergens. It is therefore crucial to understand the organization of the immune network. This article focuses on some important features and key players involved in adaptive immune response. The first part of the article dealt with the humoral immune response mediated mainly by immunoglobulins produced by the B cells. The second part deals with T cells, the Major Histocompatibility Complex (MHC)-encoded molecules, and Recombination Activating Genes (RAG) responsible for generating diverse B-cell receptors (BCR) and T-cell receptors (TCR). With the advent of newer and smarter infectious agents, it is important to understand the working of the immune network as more research in this area may facilitate the development of better protective strategies. 相似文献
33.
This paper estimates the impact of private education on the academic achievement of low-income students in Chile. To deal with selection bias, we use propensity score matching to compare the test scores of reduced-fee paying, low-income students in fee-charging private voucher schools to those of similar students in public schools and free private voucher schools. Our results reveal that students in fee-charging private voucher schools score slightly higher than students in public schools. The difference in standardized test scores is approximately 10 points, a test score gain of 0.2 standard deviations. We find no difference in the academic achievement of students in the fee-charging private voucher treatment group relative to their counterparts in free private voucher schools. 相似文献
34.
Wieslaw L. Nowinski Arumugam Thirunavuukarasuu Anand Ananthasubramaniam Beng Choon Chua Guoyu Qian Natalia G. Nowinska Yevgen Marchenko Ihar Volkau 《Anatomical sciences education》2009,2(5):244-252
Preparation of tests and student's assessment by the instructor are time consuming. We address these two tasks in neuroanatomy education by employing a digital media application with a three‐dimensional (3D), interactive, fully segmented, and labeled brain atlas. The anatomical and vascular models in the atlas are linked to Terminologia Anatomica. Because the cerebral models are fully segmented and labeled, our approach enables automatic and random atlas‐derived generation of questions to test location and naming of cerebral structures. This is done in four steps: test individualization by the instructor, test taking by the students at their convenience, automatic student assessment by the application, and communication of the individual assessment to the instructor. A computer‐based application with an interactive 3D atlas and a preliminary mobile‐based application were developed to realize this approach. The application works in two test modes: instructor and student. In the instructor mode, the instructor customizes the test by setting the scope of testing and student performance criteria, which takes a few seconds. In the student mode, the student is tested and automatically assessed. Self‐testing is also feasible at any time and pace. Our approach is automatic both with respect to test generation and student assessment. It is also objective, rapid, and customizable. We believe that this approach is novel from computer‐based, mobile‐based, and atlas‐assisted standpoints. Anat Sci Educ 2:244–252, 2009. © 2009 American Association of Anatomists. 相似文献
35.
B. N. Anand 《Resonance》1998,3(6):52-61
A number of non-heme proteins contain iron-sulfur clusters as their core. The various structural types that have been characterised so far are discussed. Attempts to understand their properties and functions at a molecular level through model systems are described. 相似文献
36.
Anand K. Bachhawat 《Resonance》2006,11(8):22-40
An important hallmark of biological research is the aspect of ‘comparisons’. As the complete genome sequences of numerous
organisms have become available, the emphasis in biology has shifted to comparisons at the genome level. Indeed, the last
few years have witnessed an exponential rise in the number of organisms whose complete genome has been sequenced, and we are
still climbing up the graph. The present article, a primer, explains how one can extract a great deal of information from
such analyses that is of great value in our research. The subject of comparative genomics impinges on evolutionary biology
and phylogenetic reconstructions of the tree of life, drug discovery programs, function predictions of hypothetical proteins
and genes, regulatory motifs and other non-coding DNA motifs, and genome flux and dynamics. Finally the article describes
how the information one can extract from a comparative analysis of genomes depends to a large extent, on the specific aspect
of the genomes that is being compared and the phylogenetic distances of the organisms involved. 相似文献
37.
Subramania Ranganathan 《Resonance》1997,2(2):41-51
A simple procedure for determining whether a pericyclic reaction is thermally allowed is described. The focus is on the potential aromaticity of the transition state of the process, which is inferred from the topological features of the interacting orbitals and the number of electrons involved. 相似文献
38.
39.
40.
S. Ranganathan 《Resonance》1998,3(2):45-52
The modes of action of two enzyme ensembles that perform critical life operations are described. 相似文献