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排序方式: 共有135条查询结果,搜索用时 31 毫秒
1.
Stortelder A Buijs JB Bulthuis J van der Vies SM Gooijer C van der Zwan G 《Journal of photochemistry and photobiology. B, Biology》2005,78(1):53-60
The time-resolved fluorescence properties of the bacteriophage T4 capsid protein gp23 are investigated. The structural characteristics of this protein are largely unknown and can be probed by recording time-resolved and decay-associated fluorescence spectra and intensity decay curves using a 200 ps-gated intensified CCD-camera. Spectral and decay data are recorded simultaneously, which makes data acquisition fast compared to time-correlated single-photon counting. A red-shift of the emission maximum within the first nanosecond of decay is observed, which can be explained by the different decay-associated spectra of fluorescence lifetimes of the protein in combination with dipolar relaxation. In addition, iodide quenching experiments are performed, to study the degree of exposure of the various tryptophan residues. A model for the origin of the observed lifetimes of 0.032 +/- 0.003, 0.39 +/- 0.06, 2.1 +/- 0.1 and 6.8 +/- 0.8 ns is presented: the 32 ps lifetime can be assigned to the emission of a buried tryptophan residue, the 0.4 and 2.1 ns lifetimes to two partly buried residues, and the 6.8 ns lifetime to a single tryptophan outside the bulk of the folded gp23. 相似文献
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Saskia Menzel Konstantinos D. Demadis Christoph Janiak 《Phosphorus, sulfur, and silicon and the related elements》2020,195(10):830-835
AbstractThe fully deprotonated anion of 1,3,5-benzene-triphosphonic acid 1,3,5-C6H3[PO32?]3 gives rise to deceptively simple 1H and 31P NMR spectra due to a corresponding [AX]3 spin system. The 13C{1H} NMR spectrum reveals two 13C isotopomers which are identified via AXX′2 systems. Results from analysis and iteration are described. 相似文献
5.
Advances in wide bandgap SiC for optoelectronics 总被引:1,自引:0,他引:1
Haiyan Ou Yiyu Ou Aikaterini Argyraki Saskia Schimmel Michl Kaiser Peter Wellmann Margareta K. Linnarsson Valdas Jokubavicius Jianwu Sun Rickard Liljedahl Mikael Syväjärvi 《The European Physical Journal B - Condensed Matter and Complex Systems》2014,87(3):1-16
Silicon carbide (SiC) has played a key role in power electronics thanks to its unique physical properties like wide bandgap, high breakdown field, etc. During the past decade, SiC is also becoming more and more active in optoelectronics thanks to the progress in materials growth and nanofabrication. This paper will review the advances in fluorescent SiC for white light-emitting diodes, covering the poly-crystalline doped SiC source material growth, single crystalline epitaxy growth of fluorescent SiC, and nanofabrication of SiC to enhance the extraction efficiency for fluorescent SiC based white LEDs. 相似文献
6.
In examining C-6 modified 4-nitrophenyl beta-D-galactopyranosides as donor structures the beta-galactosidase (Bacillus circulans) revealed an unexpectedly broad substrate specificity which allowed successful syntheses of various disaccharide components. 相似文献
7.
Saskia Biskup Darren J Moore Alexis Rea Bettina Lorenz-Deperieux Candice E Coombes Valina L Dawson Ted M Dawson Andrew B West 《BMC neuroscience》2007,8(1):102
Background
Mutations within the leucine-rich repeat kinase 2 (LRRK2) gene account for a significant proportion of autosomal-dominant and some late-onset sporadic Parkinson's disease. Elucidation of LRRK2 protein function in health and disease provides an opportunity for deciphering molecular pathways important in neurodegeneration. In mammals, LRRK1 and LRRK2 protein comprise a unique family encoding a GTPase domain that controls intrinsic kinase activity. The expression profiles of the murine LRRK proteins have not been fully described and insufficiently characterized antibodies have produced conflicting results in the literature. 相似文献8.
We highlight what seems to be a remaining subtlety in the argument for the cancellation of the total anomaly associated with the M5-brane in M-theory. Then, we prove that this subtlety is resolved under the hypothesis that the C-field flux is charge-quantized in the generalized cohomology theory called J-twisted cohomotopy.
相似文献9.
Noise map validation by continuous noise monitoring 总被引:1,自引:0,他引:1
Piotr Mioduszewski Jerzy A. Ejsmont Jan Grabowski Daniel Karpiński 《Applied Acoustics》2011,72(8):582-589
This paper presents a comparison of two noise assessments in the Gdansk agglomeration in Poland. One is based on the noise map produced by computational method for the city in 2007, the second one is based on real data from continuous measurements acquired by a noise monitoring network operating in the city since 2008. Differences are shown and analyzed. Additionally, seasonal and weekday influence on noise indicators (LDEN, LD, LE and LN) is analyzed and discussed in this paper. 相似文献
10.
Sven Tombrink Saskia Müller Richard Heming Antje Michels Peter Lampen Joachim Franzke 《Analytical and bioanalytical chemistry》2010,397(7):2917-2922
In this study a simple micro-tube-based system for analysis of metal-containing liquids is introduced and its analytical performance
is evaluated. It is based on a miniaturised dielectric barrier discharge driven at atmospheric pressure. The emission lines
of various elements are observed. The system is developed for quantitative measurements and the limits of detection are determined.
Because of very low flow rates of just μL min−1 the approach requires extremely low sample volumes. 相似文献