New Approach for Local Structure Analysis of the Tyrosine Domain in Proteins by Using a Site-Specific and Polarity-Sensitive Fluorescent Probe

ChemBioChem ◽  
2009 ◽  
Vol 10 (7) ◽  
pp. 1200-1207 ◽  
Author(s):  
Suming Chen ◽  
Xiaohua Li ◽  
Huimin Ma
Keyword(s):  
Fluorescent Probe ◽  
Structure Analysis ◽  
Local Structure ◽  
Site Specific ◽  
New Approach ◽  
A Site ◽  
Polarity Sensitive

scholarly journals Selenomethionine, p-cyanophenylalanine pairs provide a convenient, sensitive, non-perturbing fluorescent probe of local helical structure

2016 ◽  
Vol 52 (10) ◽  
pp. 2055-2058 ◽  
Author(s):  
Ivan Peran ◽  
Matthew D. Watson ◽  
Osman Bilsel ◽  
Daniel P. Raleigh
Keyword(s):  
Fluorescent Probe ◽  
Short Range ◽  
Helical Structure ◽  
Specific Probe ◽  
Site Specific ◽  
A Site

Selenomethionine is a short range quencher of p-cyanophenylalanine fluorescence and these residues provide a site-specific probe of protein helical structure.

A site-specific comparative study of Au102 and Au25 nanoclusters using theoretical EXAFS and l-DOS

2015 ◽  
Vol 93 (1) ◽  
pp. 32-36 ◽  
Author(s):  
Stephen L. Christensen ◽  
Peter Cho ◽  
Amares Chatt ◽  
Peng Zhang
Keyword(s):  
Comparative Study ◽  
Photoelectron Spectroscopy ◽  
Local Structure ◽  
Site Effects ◽  
Local Density ◽  
Site Specific ◽  
X Ray ◽  
Significant Difference ◽  
A Site ◽  
Electronic Character

Recent advances in Au–thiolate nanocluster synthesis have allowed the total structural determination of several nanoclusters by X-ray crystallography. The high-precision structural information of these nanoclusters enables atomic site-specific analysis of local structure and electronic character. In this work, a site-specific comparative study of Au102(SR)44 and Au25(SR)18 was conducted to elucidate the size and site effects on the local environment and electronic character of their common surface structural unit, the –SR–Au–SR–Au–SR– “double-staple” motif. Simulation of the pseudo-radial distribution function from extended X-ray absorption fine structure (EXAFS) shows a significant difference in their local environments despite their identical geometric shape. Local density of states (l-DOS) calculations consistently reveal the difference in their electronic characters for gold d-electron density and d-DOS position. These differences are then related to the unique aurophilic interactions and size- or site-dependent electronic character of Au atoms in the double-staple motif. The differing local structure and electronic behaviour of the “double-staple” motif in Au102(SR)44 and Au25(SR)18 highlight the significance of both size and site effects on the surface structure and electronic property of Au–thiolate nanoclusters. The theoretical results may also be useful in the interpretation of future experimental XAFS and X-ray photoelectron spectroscopy (XPS) data of these nanoclusters.

New Approach for Analyzing Collision of Ships

2009 ◽  
Author(s):  
B. S. Yoon ◽  
S. R. Cho ◽  
H. Isshiki
Keyword(s):  
Structure Analysis ◽  
Local Structure ◽  
Present Model ◽  
Simple Calculation ◽  
Hydrodynamic Effect ◽  
New Approach ◽  
Spring System ◽  
Lumped Masses ◽  
Correct Understanding ◽  
Reasonable Model

In order to avoid the loss of human lives due to a collision of ships, it is very important to have a correct understanding on the phenomena of collision of ships and collapse of ships due to collision. A more reasonable model describing collision of ships and whole structure analysis is proposed in the present paper. Present model employs lumped masses with elasto-plastic spring system to represent striking ship considering hydrodynamic effect during collision process. When the responses of the whole structures of a striking ship and a struck one are estimated properly, more exact local structure analysis would be possible. And this makes it possible to design more reliable shock absorbing structures, soft bow for example. Quite good results are shown for behavior and deformation of striking ship by very simple calculation based upon the model proposed in the present paper.

Colonialism and the Highland Clearances

2017 ◽  
Vol 8 (1) ◽  
pp. 22-48 ◽  
Author(s):  
Iain Mackinnon
Keyword(s):  
Industrial Development ◽  
Comparative Approach ◽  
Indigenous Research ◽  
Internal Colonialism ◽  
New Approach ◽  
A Site ◽  
Relationship Of ◽  
The Relationship ◽  
Imperial State ◽  
Late Modern

This article employs a new approach to studying internal colonialism in northern Scotland during the 18th and 19th centuries. A common approach to examining internal colonial situations within modern state territories is to compare characteristics of the internal colonial situation with attested attributes of external colonial relations. Although this article does not reject the comparative approach, it seeks to avoid criticisms that this approach can be misleading by demonstrating that promoters and managers of projects involving land use change, territorial dispossession and industrial development in the late modern Gàidhealtachd consistently conceived of their work as projects of colonization. It further argues that the new social, cultural and political structures these projects imposed on the area's indigenous population correspond to those found in other colonial situations, and that racist and racialist attitudes towards Gaels of the time are typical of those in colonial situations during the period. The article concludes that the late modern Gàidhealtachd has been a site of internal colonization where the relationship of domination between colonizer and colonized is complex, longstanding and occurring within the imperial state. In doing so it demonstrates that the history and present of the Gaels of Scotland belongs within the ambit of an emerging indigenous research paradigm.

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