Synthesis, structural characterization, and chemical properties of pentacoordinate model complexes for the active site of [Fe]-hydrogenase

RSC Advances ◽  
2016 ◽  
Vol 6 (87) ◽  
pp. 84139-84148 ◽  
Author(s):  
Shuang Jiang ◽  
Tianyong Zhang ◽  
Xia Zhang ◽  
Guanghui Zhang ◽  
Li Hai ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Active Site ◽  
Chemical Properties ◽  
Steric Effects ◽  
Model Complexes ◽  
Electronic And Steric Effects ◽  
And Chemical Properties

Four pentacoordinate iron dicarbonyl with bulky NHC ligands were synthesised as model of [Fe]-hydrogenase active site, which exhibited different protonation reactivity due to the variable electronic and steric effects of introduced ligands.

Cover Picture:meso-Aryl Substituted Rubyrin and Its Higher Homologues: Structural Characterization and Chemical Properties (Chem. Eur. J. 9/2008)

2008 ◽  
Vol 14 (9) ◽  
pp. 2635-2635
Author(s):  
Soji Shimizu ◽  
Won-Seob Cho ◽  
Jonathan L. Sessler ◽  
Hiroshi Shinokubo ◽  
Atsuhiro Osuka
Keyword(s):  
Structural Characterization ◽  
Chemical Properties ◽  
And Chemical Properties

scholarly journals β-amylase-resistant amylose. Effect of urea on the limited hydrolysis of amylose by β-amylase

1976 ◽  
Vol 153 (2) ◽  
pp. 339-342 ◽  
Author(s):  
N B Patil
Keyword(s):  
Active Site ◽  
Chemical Properties ◽  
Inhibitory Effect ◽  
Physical And Chemical Properties ◽  
Urea Treatment ◽  
Conventional Methods ◽  
Physical And Chemical ◽  
Hydrolysis Of ◽  
And Chemical Properties

Amylose prepared from starch dispersed in 10M-urea, pH6.2, was found to be resistant to the action of β-amylase and phosphorylase, though it was degraded by α-amylase. Amylose isolated by conventional methods was similarly refractory after urea treatment, and was hydrolysed by β-amylase to the extent of 32-35%; it had no inhibitory effect towards β-amylase. The physical and chemical properties of the modified amylose were in general comparable with those of normal amylose with a β-amylolysis limit of 94-98%%. Starch and amylopectin were unaffected by urea treatment, i.e. the presence of amylopectin protected amylose against changes induced in it by urea. It is speculated that urea treatment “freezes” amylose molecules in a conformation that renders non-reducing termini inaccessible to the active site of the exo-enzymes. Such changes may limit the degradative action of β-amylase and phosphorylase.

meso-Aryl Substituted Rubyrin and Its Higher Homologues: Structural Characterization and Chemical Properties

2008 ◽  
Vol 14 (9) ◽  
pp. 2668-2678 ◽  
Author(s):  
Soji Shimizu ◽  
Won-Seob Cho ◽  
Jonathan L. Sessler ◽  
Hiroshi Shinokubo ◽  
Atsuhiro Osuka
Keyword(s):  
Structural Characterization ◽  
Chemical Properties ◽  
And Chemical Properties

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

The microstructure of a TiB2/Ti-47 Al composite material

1989 ◽  
Vol 47 ◽  
pp. 674-675
Author(s):  
O. Popoola ◽  
A.H. Heuer ◽  
P. Pirouz
Keyword(s):  
Composite Material ◽  
Ion Beam ◽  
Chemical Properties ◽  
Intermetallic Alloys ◽  
Transmission Electron ◽  
Diamond Polishing ◽  
Al Composite ◽  
The Matrix ◽  
Argon Ion ◽  
And Chemical Properties

The addition of fibres or particles (TiB2, SiC etc.) into TiAl intermetallic alloys could increase their toughness without compromising their good high temperature mechanical and chemical properties. This paper briefly discribes the microstructure developed by a TiAl/TiB2 composite material fabricated with the XD™ process and forged at 960°C.The specimens for transmission electron microscopy (TEM) were prepared in the usual way (i.e. diamond polishing and argon ion beam thinning) and examined on a JEOL 4000EX for microstucture and on a Philips 400T equipped with a SiLi detector for microanalyses.The matrix was predominantly γ (TiAl with L10 structure) and α2(TisAl with DO 19 structure) phases with various morphologies shown in figure 1.

Tailoring microstructures of materials through biomimetics

1993 ◽  
Vol 51 ◽  
pp. 500-501
Author(s):  
Mehmet Sarikaya ◽  
Ilhan A. Aksay
Keyword(s):  
Chemical Properties ◽  
Design And Synthesis ◽  
Structure Sensitive ◽  
Macro Scale ◽  
Methods Of Synthesis ◽  
Successive Level ◽  
Engineering Materials ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Synthesis Of Materials

Biomimetics involves investigation of structure, function, and methods of synthesis of biological composite materials. The goal is to apply this information to the design and synthesis of materials for engineering applications.Properties of engineering materials are structure sensitive through the whole spectrum of dimensions from nanometer to macro scale. The goal in designing and processing of technological materials, therefore, is to control microstructural evolution at each of these dimensions so as to achieve predictable physical and chemical properties. Control at each successive level of dimension, however, is a major challenge as is the retention of integrity between successive levels. Engineering materials are rarely fabricated to achieve more than a few of the desired properties and the synthesis techniques usually involve high temperature or low pressure conditions that are energy inefficient and environmentally damaging.In contrast to human-made materials, organisms synthesize composites whose intricate structures are more controlled at each scale and hierarchical order.

Sign in / Sign up

Export Citation Format

Share Document