全文获取类型
收费全文 | 924篇 |
免费 | 71篇 |
国内免费 | 1篇 |
出版年
2022年 | 7篇 |
2021年 | 17篇 |
2020年 | 7篇 |
2019年 | 11篇 |
2018年 | 7篇 |
2017年 | 9篇 |
2016年 | 24篇 |
2015年 | 45篇 |
2014年 | 45篇 |
2013年 | 51篇 |
2012年 | 74篇 |
2011年 | 95篇 |
2010年 | 31篇 |
2009年 | 34篇 |
2008年 | 40篇 |
2007年 | 44篇 |
2006年 | 50篇 |
2005年 | 49篇 |
2004年 | 30篇 |
2003年 | 34篇 |
2002年 | 28篇 |
2001年 | 20篇 |
2000年 | 22篇 |
1999年 | 21篇 |
1998年 | 4篇 |
1997年 | 9篇 |
1996年 | 8篇 |
1995年 | 10篇 |
1994年 | 4篇 |
1993年 | 6篇 |
1992年 | 14篇 |
1991年 | 17篇 |
1990年 | 23篇 |
1989年 | 6篇 |
1988年 | 17篇 |
1987年 | 11篇 |
1986年 | 5篇 |
1985年 | 7篇 |
1984年 | 4篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 7篇 |
1975年 | 3篇 |
1974年 | 4篇 |
1973年 | 3篇 |
1972年 | 3篇 |
1966年 | 2篇 |
1935年 | 2篇 |
排序方式: 共有996条查询结果,搜索用时 15 毫秒
11.
Summary This paper evaluates and extends the novel method of preparing tissue blocks for paraffin sections within 30 to 60 min, that was proposed in early 1985 in a paper by Boonet al. (1986). More than 2 years' additional experience and testing various microwave ovens has led to new protocols reported in this paper. Results are given of testing (i) an especially designed microwave oven for histoprocessing, (ii) microwavable reagents, (iii) processing larger numbers of specimens simultaneously, (iv) handling different types and sizes of tissue. It is concluded that effective temperature control offers substantial advantages. In addition, the possibilities of performing routine diagnostic pathology omitting formalin altogether are sketched. 相似文献
12.
13.
Protection and deprotection of horse cytochrome c 总被引:1,自引:0,他引:1
The last step in the semisynthesis of horse cytochrome c analogues (formation of the bond 65-66) requires the conformation of the complex between two complementary fragments, (1-65) lactone and (66-104). The fragments can be obtained from a limited degradation with cyanogen bromide. The amino component in this reaction can also be obtained from organo chemical synthesis in which the C-terminal fragment (81-104) is required in a selectively protected form. The latter is available from a cyanogen bromide degradation of ubiquitously protected cytochrome c. The details of the protection/deprotection reaction and the properties of nonadecamethylsulfonylethyloxycarbonyl cytochrome c are described. 相似文献
14.
Occurrence of P503 in microorganisms 总被引:1,自引:0,他引:1
15.
16.
Boon Seng Ooi Beatrice T. M. Chen Charles C. S. Toh Oon Teik Khoo 《BMJ (Clinical research ed.)》1970,3(5725):744-746
Of 127 hypertensive patients aged 12 to 40 investigated by intravenous pyelography, abdominal aortography, and renal biopsy an underlying cause was found in 57%. The proportion with secondary hypertension was higher in young patients and in those with severe hypertension. Primary arteritis of the aorta was an important cause of renovascular hypertension in an Asian population. 相似文献
17.
18.
Amelia K. Kivaisi Huub J. M. Op den Camp Henk J. Lubberding Jaap J. Boon Godfried D. Vogels 《Applied microbiology and biotechnology》1990,33(1):93-98
Summary The supernatants of effluents from an artificial rumen reactor degrading barley straw have been shown to contain lignin-derived compounds by UV spectral characteristics and pyrolysis mass spectrometry (PYMS). Most of these compounds were shown to be released by the action of rumen microorganisms. The compounds were quantified by measuring absorbance at 280 nm using bamboo-milled wood lignin as a standard. The concentration of the compounds rose from 0.5 mg·ml–1 at solid and liquid retention times (SRT and HRT) of 60 and 12 h, respectively, and a loading rate (LR) of 25 g total solids (TS)·l–1 per day to 3.5 mg·ml–1 at a SRT of 144 h, an HRT of 20 days and an LR of 15 g TS·1–1 per day. The highest concentration was below the level known to be toxic to rumen microorganisms in vitro. No indications were found for anaerobic lignin degradation in the rumen reactor.
Offprint requests to: H. J. M. Op den Camp 相似文献
19.
W Musters K Boon C A van der Sande H van Heerikhuizen R J Planta 《The EMBO journal》1990,9(12):3989-3996
20.