全文获取类型
收费全文 | 859篇 |
免费 | 61篇 |
国内免费 | 2篇 |
出版年
2020年 | 8篇 |
2018年 | 10篇 |
2015年 | 19篇 |
2014年 | 22篇 |
2013年 | 34篇 |
2012年 | 56篇 |
2011年 | 31篇 |
2010年 | 22篇 |
2009年 | 32篇 |
2008年 | 46篇 |
2007年 | 32篇 |
2006年 | 32篇 |
2005年 | 29篇 |
2004年 | 24篇 |
2003年 | 23篇 |
2002年 | 27篇 |
2001年 | 26篇 |
2000年 | 14篇 |
1999年 | 14篇 |
1998年 | 8篇 |
1996年 | 7篇 |
1995年 | 10篇 |
1994年 | 7篇 |
1992年 | 6篇 |
1991年 | 16篇 |
1990年 | 14篇 |
1989年 | 7篇 |
1988年 | 8篇 |
1987年 | 12篇 |
1986年 | 7篇 |
1985年 | 13篇 |
1984年 | 17篇 |
1983年 | 16篇 |
1982年 | 14篇 |
1981年 | 10篇 |
1980年 | 10篇 |
1979年 | 20篇 |
1978年 | 14篇 |
1977年 | 8篇 |
1976年 | 9篇 |
1975年 | 10篇 |
1974年 | 13篇 |
1973年 | 15篇 |
1972年 | 5篇 |
1971年 | 6篇 |
1970年 | 5篇 |
1969年 | 5篇 |
1968年 | 10篇 |
1964年 | 6篇 |
1960年 | 5篇 |
排序方式: 共有922条查询结果,搜索用时 15 毫秒
861.
862.
863.
864.
Strudwick Paige Seymour Justin Camp Emma F. Edmondson John Haydon Trent Howlett Lorna Le Reun Nine Siboni Nahcshon Suggett David J. 《Coral reefs (Online)》2022,41(1):95-112
Coral Reefs - Efforts to manage coral reef declines are increasingly turning towards in situ propagation of corals to aid reef recovery. Understanding the factors that influence... 相似文献
865.
866.
Seymour I. Schlager 《Cellular immunology》1982,66(2):300-316
Treatment of P815 tumor cells with adriamycin increased their sensitivity to killing by anti-P815 antibody plus C, but not by allogeneic P815-sensitized spleen cells. Conversely, mitomycin C treatment enhanced the cells' sensitivity to cell-mediated, but not antibody-C, killing. Hydrocortisone, but not epinephrine, was effective in increasing the resistance of the cells to killing by both antibody-C and cell-mediated attack systems. The ability of the tumor cells to resist antibody-C killing correlated with their ability to incorporate fatty acid into complex cellular lipid; no such correlation was found between the cellular lipid synthesis and tumor cell susceptibility to cell-mediated killing. Drug or hormone-treated tumor cells exhibited unique changes in cellular lipid synthesis and composition and in cell surface physical properties that correlated with their susceptibility to antibody-C or cell-mediated attack. Cells increased in their sensitivity to antibody-C killing exhibited a decreased cholesterol:phospholipid mole ratio. In contrast, cells rendered more sensitive to cell-mediated killing exhibited an increase in polar phospholipid content and a measurable decrease in net negative cell surface charge density. These data implicate unique chemical and/or physical properties of tumor cells to be of fundamental importance for their ability to resist either humoral or cell-mediated immunologic attack; modulation of one or another of these cellular properties results in a change in the cells' susceptibility to immune killing by antibody plus C or by cytotoxic T lymphocytes. 相似文献
867.
868.
869.
870.