全文获取类型
收费全文 | 62篇 |
免费 | 0篇 |
专业分类
化学 | 59篇 |
物理学 | 3篇 |
出版年
2022年 | 4篇 |
2021年 | 2篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2012年 | 2篇 |
2011年 | 2篇 |
2010年 | 4篇 |
2009年 | 1篇 |
2008年 | 2篇 |
2007年 | 2篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 4篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
排序方式: 共有62条查询结果,搜索用时 15 毫秒
61.
A. B. Mirgorodskaya L. A. Kudryavtseva N. N. Vylegzhanina Yu. F. Zuev B. Z. Idiyatullin 《Kinetics and Catalysis》2006,47(1):5-11
The kinetic parameters of the transesterification processes of carboxylic acid esters under the action of alkylphenolates in aqueous micellar solutions of cetyltrimethylammonium bromide (CTAB) are found. The observed catalytic effect is due to a complex mechanism of the solvent effect, which includes a shift of acid-base equilibria in the nucleophile and the formation of mixed CTAB/alkylphenol micelles. The dynamic structure of these aggregates (size, diffusion mobility, and molecular packing density in a surface layer) has been characterized by spin-probe EPR spectroscopy and high-resolution pulsed-field gradient 1H NMR spectroscopy. 相似文献
62.
Quantitation of peptides and proteins by matrix-assisted laser desorption/ionization mass spectrometry using (18)O-labeled internal standards 总被引:2,自引:0,他引:2
Mirgorodskaya OA Kozmin YP Titov MI Körner R Sönksen CP Roepstorff P 《Rapid communications in mass spectrometry : RCM》2000,14(14):1226-1232
A method for quantitating proteins and peptides in the low picomole and sub-picomole range has been developed using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) with internal (18)O-labeled standards. A simple procedure is proposed to produce such internal standards for the tested sample by enzymatic hydrolysis of the same sample (with known concentration) in (18)O-water. A mathematical algorithm was developed which uses the isotopic patterns of the substance, the internal standard, and the substance/internal standard mixture for accurate quantitation of the substance. A great advantages of the proposed method is the absence of molecular weight limitation for the protein quantitation and the possibility of quantitation without previous fractionation of proteins and peptides. Using this strategy, the peptide angiotensinogen and two proteins, RNase and its protein inhibitor, were quantified by MALDI-time-of-flight (TOF) mass spectrometry. 相似文献