全文获取类型
收费全文 | 580篇 |
免费 | 0篇 |
专业分类
综合类 | 1篇 |
化学工业 | 7篇 |
轻工业 | 1篇 |
一般工业技术 | 2篇 |
冶金工业 | 568篇 |
自动化技术 | 1篇 |
出版年
2014年 | 1篇 |
2013年 | 1篇 |
2011年 | 1篇 |
2007年 | 2篇 |
2006年 | 1篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2000年 | 1篇 |
1999年 | 7篇 |
1998年 | 115篇 |
1997年 | 90篇 |
1996年 | 86篇 |
1995年 | 49篇 |
1994年 | 32篇 |
1993年 | 30篇 |
1992年 | 6篇 |
1991年 | 5篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 6篇 |
1985年 | 2篇 |
1983年 | 3篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 6篇 |
1978年 | 1篇 |
1977年 | 27篇 |
1976年 | 77篇 |
1955年 | 1篇 |
1954年 | 1篇 |
排序方式: 共有580条查询结果,搜索用时 0 毫秒
571.
YG Shckorbatov NN Grigoryeva VG Shakhbazov VA Grabina AM Bogoslavsky 《Canadian Metallurgical Quarterly》1998,19(7):414-419
Changes of electrokinetic properties of cell nuclei and the quantity of granules of heterochromatin located near the nuclear envelope in nuclei of human buccal epithelium cells were studied under the influence of electromagnetic fields in vitro. Irradiation of cells was realized by means of a semiconductor generator of millimeter radiation (wavelength 7.1 mm, frequency 42.2 GHz), the Yav-1 apparatus for extremely high frequency therapy. It was shown that irradiation of cells induced a decrease in electric charge of native human buccal epithelium cell nuclei and an increase in chromatin condensation in nuclei. The observed effects depend on irradiation dose and individual peculiarities of donors. 相似文献
572.
573.
574.
575.
576.
577.
578.
The nystagmic reflex, latent period, total and mean number of events, and their duration were measured in the rats flown for 18.5 days aboard the biosatellite Cosmos-936 under the conditions of weightlessness and artificial gravity. The studies demonstrated that prolonged weightlessness did not influence the receptor formations and centers of semi-circular canals. A long exposure to artificial gravity brought about a decrease in reactivity and sensitivity of semi-circular canals. The mechanisms of these phenomena are discussed. 相似文献
579.
VM Subbotin MIa Subbotin SI Kolesnikov VG Paraskun 《Canadian Metallurgical Quarterly》1976,70(5):25-31
Principle possibilities of the complex evaluation of the mother-fetus exchange were studied by means of morphological investigations of the human placenta in normality, in vesicular mole, late toxicoses, hemolytic disease of newborns and malformations of the fetus. The investigation of the ratio of the villi of different size, deposition of fibrinoid on their surface, the change of the amount of cytotrophoblastic elements, cells of Kaschenko-Hofbauer and the polymerity of the basic substance are of diagnostic value. The authors propose the basal lamina of the placenta to be included into the scheme of the examination of placenta. 相似文献
580.
本文就十三个体系研究了色谱斜率法VG公式的适用条件.结果表明,除了该公式本身要求实验柱温在溶质沸点附近外,VLE预测结果还取决于过量自由焓模型的选择.对于使用UNIQUAC方程,在溶质沸点以下0~5.5℃的温度范围内可获得满意的VLE预测结果,对于Wilson方程,如果在求解Wilson参数的过程中不出现多解,则在溶质沸点以下3~5℃的温度范围内可获得满意的VLE预测结果.不论对UNIQUAC方程还是Wilson方程,一旦在求解方程参数的过程中出现多解,则应用本文所提出的“最小解原则”可以很好地进行VLE预测. 相似文献