全文获取类型
收费全文 | 195篇 |
免费 | 10篇 |
出版年
2022年 | 4篇 |
2021年 | 2篇 |
2020年 | 6篇 |
2019年 | 12篇 |
2018年 | 5篇 |
2017年 | 7篇 |
2016年 | 5篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 9篇 |
2012年 | 15篇 |
2011年 | 8篇 |
2010年 | 11篇 |
2009年 | 4篇 |
2008年 | 7篇 |
2007年 | 8篇 |
2006年 | 3篇 |
2005年 | 7篇 |
2004年 | 9篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1975年 | 3篇 |
1971年 | 2篇 |
1970年 | 1篇 |
排序方式: 共有205条查询结果,搜索用时 0 毫秒
201.
B Habibi J P Allain A M Couroucé 《Revue fran?aise de transfusion et immuno-hématologie》1983,26(5):447-465
This report was presented at the June 1983 meeting of the Blood Transfusion National Consultative Commission at the French Ministry of Health. Clinical and epidemiological data on AIDS as well as problems raised by the lack of specific tests for screening of blood donors were briefly summarized. Out of 49 AIDS patients recorded in France up to April 1983, only one had a history of previous blood transfusion given in Haiti, 4 years before the clinical onset of the disease. Blood donors, all Haitians, had no sign and symptom of AIDS. Retrospective review of 2 300 hemophiliacs followed up in France until April 1983 disclosed no AIDS. However, in 6 patients, the following features, more or less associated, were found to be present: thrombocytopenia, neutropenia, micropolyadenopathy, splenomegaly, hypergammaglobulinemia and low OKT4/OKT8 ratio. No clear correlation could be found between these abnormalities and the origin, commercial or national, of the coagulation factor concentrates used for the treatment. Three main recommendations were proposed: -- information of blood donors and experimental evaluation of some non specific screening tests, in the at risk donor population. -- more cautious use of coagulation factor concentrates -- reduction of importations aiming at complete national self sufficiency concerning factor VIII concentrates. 相似文献
202.
Atousa Moradzadegan Seyed‐Omid Ranaei‐Siadat Azadeh Ebrahim‐Habibi Mohammad Barshan‐Tashnizi Rouhollah Jalili Seyed‐Fakhraddin Torabi Khosro Khajeh 《Engineering in Life Science》2010,10(1):57-64
Electrospinning, a simple and versatile method to fabricate nanofibrous supports, has attracted continuous attention in the field of enzyme immobilization. In this study, acetylcholinesterase (AChE) has been successfully immobilized in PVA nanofibers via electrospinning of a mixture of AChE, BSA as an enzyme stabilizing additive and PVA. The maximum activity recovery of immobilized AChE was about 40%. In comparison with free enzyme, the immobilized AChE showed improved stability while retaining a considerable amount of activity at lower pH values. Moreover, the immobilized AChE retained >34% of its initial activity when stored at 30°C for 100 days and retained 70% of its initial activity after ten consecutive reactor batch cycles. 相似文献
203.
204.
205.
Sajad Hassanzadeh Maryam Jalessi Seyed Behnamedin Jameie Mehdi Khanmohammadi Zohre Bagher Zeinab Namjoo Seyed Mohammad Davachi 《Biochemistry and Biophysics Reports》2021
Functional improvement after spinal cord injury remains an unsolved difficulty. Glial scars, a major component of SCI lesions, are very effective in improving the rate of this recovery. Such scars are a result of complex interaction mechanisms involving three major cells, namely, astrocytes, oligodendrocytes, and microglia. In recent years, scientists have identified two subtypes of reactive astrocytes, namely, A1 astrocytes that induce the rapid death of neurons and oligodendrocytes, and A2 astrocytes that promote neuronal survival. Moreover, recent studies have suggested that the macrophage polarization state is more of a continuum between M1 and M2 macrophages. M1 macrophages that encourage the inflammation process kill their surrounding cells and inhibit cellular proliferation. In contrast, M2 macrophages promote cell proliferation, tissue growth, and regeneration. Furthermore, the ability of oligodendrocyte precursor cells to differentiate into adult oligodendrocytes or even neurons has been reviewed. Here, we first scrutinize recent findings on glial cell subtypes and their beneficial or detrimental effects after spinal cord injury. Second, we discuss how we may be able to help the functional recovery process after injury. 相似文献