全文获取类型
收费全文 | 1955篇 |
免费 | 0篇 |
专业分类
化学工业 | 3篇 |
建筑科学 | 5篇 |
轻工业 | 4篇 |
水利工程 | 1篇 |
无线电 | 2篇 |
一般工业技术 | 3篇 |
冶金工业 | 1935篇 |
自动化技术 | 2篇 |
出版年
2014年 | 1篇 |
2011年 | 2篇 |
2010年 | 1篇 |
2008年 | 1篇 |
2007年 | 2篇 |
2006年 | 1篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 4篇 |
2001年 | 2篇 |
1999年 | 64篇 |
1998年 | 568篇 |
1997年 | 358篇 |
1996年 | 240篇 |
1995年 | 120篇 |
1994年 | 94篇 |
1993年 | 123篇 |
1992年 | 12篇 |
1991年 | 24篇 |
1990年 | 12篇 |
1989年 | 18篇 |
1988年 | 20篇 |
1987年 | 13篇 |
1986年 | 17篇 |
1985年 | 14篇 |
1983年 | 4篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 10篇 |
1979年 | 3篇 |
1978年 | 6篇 |
1977年 | 62篇 |
1976年 | 126篇 |
1975年 | 6篇 |
1972年 | 1篇 |
1965年 | 1篇 |
1963年 | 1篇 |
1955年 | 2篇 |
1954年 | 1篇 |
排序方式: 共有1955条查询结果,搜索用时 31 毫秒
261.
A case of uremia resulting from bilateral Hodgkin's lymphomatous infiltration of kidneys is reported. Uremia was an initial feature in the case and was the eventual cause of death. 相似文献
262.
AE Colás 《Canadian Metallurgical Quarterly》1976,32(11):1487-1488
Accurate estimates of the equilibrium concentrations in the non-interactive reaction of several ligands with several classes of binding sites with univalent stoichiometry can be rapidly obtained by a simple method of successive approximations on a programmable desk calculator. 相似文献
263.
G Burghen WC Duckworth AE Kitabchi SS Solomon PL Poffenbarger 《Canadian Metallurgical Quarterly》1976,57(4):1089-1092
Nonsuppressible insulin-like activity, provided by three sources, was evaluated for its effect on the proteolytic degradation of insulin utilizing insulin protease obtained from rat liver homogenate as well as liver cell membranes. All three preparations of nonsuppressible insulin-like activity were found to be competitive inhibitors of insulin degradation. In addition human plasma was fractionated yielding an acetone precipitate which was found to have nonsuppressible insulin-like activity and to be a competitive inhibitor of insulin protease. 相似文献
264.
265.
The case of a 72-yr-old woman with osteoarthritis of the shoulder, is described. A mixture of crystals of hydroxyapatite and calcium pyrophosphate dihydrate was identified in the joint tissues using analytical electron microscopy and infra-red spectroscopy. 相似文献
266.
Automation of the process of detecting adrenergic nerve structures helped obtain reliable positive results even in cases with low mediator concentration in body tissues. We have elaborated a new method of subsequent staining and microphotographing of biological specimens which permit registration of specific features of adrenergic nerve terminals histologic architecture and their cellular microenvironment. 相似文献
267.
268.
AE Markov 《Canadian Metallurgical Quarterly》1998,(5):80-82
Our objective in this study was to determine effects, if any, of different doses of of prednisone and the inhalant steroid budesonide on the indices for bone formation (osteocalcin, PICP levels) and bone resorption (piridinoline, deoxypiridinoline, and hydroxyproline) in healthy volunteers (n = 78). In the two-week study, budesonide administered in daily doses of 0.8 and 1.2 mg failed to significantly decrease serum osteocalcin; even in excessively high doses of 2.4 and 3.2 mg/a day it was found out to be associated with but insignificant decrease of PICP level. Prednisone in both a 10 mg/a day and 40 mg/a day dose appeared to significantly decrease the above measures. We take it that budesonide has a lesser effect on collagen formation than it has on bone mineralization. 相似文献
269.
YQ Huang JJ Li A Nicolaides WG Zhang AE Friedman-Kien 《Canadian Metallurgical Quarterly》1993,13(4):887-890
Growth factors, such as bFGF, have been shown to exert autocrine and paracrine effects on the growth of Kaposi's Sarcoma (KS)-derived cells, which suggested that the inhibitors of angiogenesis may be promising for KS treatment. However, KS lesions have been found to continue to enlarge after patients had been treated with FGF binding antagonists such as suramin. We investigated the effect of protamine and suramine on the growth of KS derived cells in vitro. Although both of these agents which are FGF binding antagonists were found to inhibit the incorporation of 3H thymidine in KS-derived cultured cells, increased expression of bFGF, FGF5 and the FGF receptor was observed after the KS cells were exposed to these substances. These results might explain the clinical observation that FGF binding antagonists such as suramin caused an apparent stimulation of KS tumor growth when administered systemically to patients with AIDS-related KS. 相似文献
270.