Design, Synthesis, and Characterization of a Potent Xylose Isomerase Inhibitor, D-Threonohydroxamic Acid, and High-Resolution X-ray Crystallographic Structure of the Enzyme-Inhibitor Complex

Biochemistry ◽  
1995 ◽  
Vol 34 (11) ◽  
pp. 3742-3749 ◽  
Author(s):  
Karen N. Allen ◽  
Arnon Lavie ◽  
Gregory A. Petsko ◽  
Dagmar Ringe
Keyword(s):  
High Resolution ◽  
Enzyme Inhibitor ◽  
Xylose Isomerase ◽  
Synthesis And Characterization ◽  
Crystallographic Structure ◽  
Design Synthesis ◽  
X Ray ◽  
Inhibitor Complex

Synthesis and Characterization of Low Density Bi-2223 Cuprates Superconductor Doped Eu2O3 Nanoparticles

2021 ◽  
Vol 317 ◽  
pp. 131-137
Author(s):  
Suhaimi Nurbaisyatul Ermiza ◽  
Azhan Hashim ◽  
Azman Kasim ◽  
Norazila Ibrahim ◽  
Siti Fatimah Saipuddin
Keyword(s):  
Solid State Reaction Method ◽  
Synthesis And Characterization ◽  
Crystallographic Structure ◽  
Low Density ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Resistivity Measurements

Bi1.6Pb0.4Sr2Ca2-xEuxCu3Oδ cuprates superconductor doped with Eu nanoparticles (x = 0.0000, 0.0025, 0.0200 and 0.0500) were synthesized through conventional solid state reaction method. Crystalline sucrose was added during pelletization and burn at 400°C for two hours to create low density sample. The effect of doping Eu2O3 nanoparticles on the structural and superconducting properties by means of critical temperature (Tc), critical current density (Jc), X-ray diffraction (XRD) together with Field Emission Scanning Electron Microscopy (FESEM) and Alternating Current Susceptibility (ACS) were studied. Based on XRD analyses, the crystallographic structure has shown slightly changed from tetragonal to orthorhombic. The amount of 2223 phase gradually decreased with the increment of Eu concentration which indicates that Eu nanoparticles substitution favours the growth of 2212 phases. The resistivity measurements show that the highest Tcvalue for doped samples found at 90 K for x = 0.0025. The FESEM images showed that the plate-like grains become smaller and distributed randomly without specific alignment due to the increment of Eu concentration.

scholarly journals 1,2-Dicarbonyl Radicals with Exceptional Physiological and Chemical Stability

2020 ◽  
Author(s):  
Youngsuk Kim ◽  
Jung Eun Byeon ◽  
Gu Yoon Jeong ◽  
Seoung Su Kim ◽  
Hayoung Song ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Chemical Stability ◽  
Synthesis And Characterization ◽  
Organic Radical ◽  
Design Synthesis ◽  
X Ray ◽  
Full Characterization ◽  
Redox Reactivity

<div>The present manuscript describes the design, synthesis, and characterization of the most stable organic radical reported up to date.</div><div><br></div><div>Here we report:</div><div>▪ Synthesis and full characterization including X-ray structure of stable 1,2-dicarbonyl radicals</div><div>▪ Proposed mechanism for the formation of the presented radicals</div><div>▪ Redox reactivity of the radicals</div><div>▪ Stability of the radicals under various organic and inorganic conditions</div><div>▪ Demonstration of the radicals as potential organic radical contrast agent candidate</div><div><u></u></div>

scholarly journals 1,2-Dicarbonyl Radicals with Exceptional Physiological and Chemical Stability

2020 ◽  
Author(s):  
Youngsuk Kim ◽  
Jung Eun Byeon ◽  
Gu Yoon Jeong ◽  
Seoung Su Kim ◽  
Hayoung Song ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Chemical Stability ◽  
Synthesis And Characterization ◽  
Organic Radical ◽  
Design Synthesis ◽  
X Ray ◽  
Full Characterization ◽  
Redox Reactivity

<div>The present manuscript describes the design, synthesis, and characterization of the most stable organic radical reported up to date.</div><div><br></div><div>Here we report:</div><div>▪ Synthesis and full characterization including X-ray structure of stable 1,2-dicarbonyl radicals</div><div>▪ Proposed mechanism for the formation of the presented radicals</div><div>▪ Redox reactivity of the radicals</div><div>▪ Stability of the radicals under various organic and inorganic conditions</div><div>▪ Demonstration of the radicals as potential organic radical contrast agent candidate</div><div><u></u></div>

scholarly journals Highly Stable 1,2-Dicarbonyl Radical Cations Derived from N-Heterocyclic Carbenes

2021 ◽  
Author(s):  
Youngsuk Kim ◽  
Jung Eun Byeon ◽  
Gu Yoon Jeong ◽  
Seoung Su Kim ◽  
Hayoung Song ◽  
...  
Keyword(s):  
Radical Cations ◽  
Heterocyclic Carbenes ◽  
Synthesis And Characterization ◽  
Organic Radical ◽  
Design Synthesis ◽  
X Ray ◽  
Full Characterization ◽  
Redox Reactivity

<div>The present manuscript describes the design, synthesis, and characterization of the most stable organic radical reported up to date.</div><div><br></div><div>Here we report:</div><div>▪ Synthesis and full characterization including X-ray structure of stable 1,2-dicarbonyl radicals</div><div>▪ Proposed mechanism for the formation of the presented radicals</div><div>▪ Redox reactivity of the radicals</div><div>▪ Stability of the radicals under various organic and inorganic conditions</div><div><u></u></div>

Synthesis and characterization of TiN / Ti / AISI 410 coatings

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
S Chirino ◽  
Jaime Diaz ◽  
N Monteblanco ◽  
E Valderrama
Keyword(s):  
Synthesis And Characterization ◽  
Photoemission Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Columnar Grains ◽  
Tin Thin Films ◽  
Steel Aisi ◽  
Interacting Surfaces ◽  
Stainless Steel Aisi

The synthesis and characterization of Ti and TiN thin films of different thicknesses was carried out on a martensitic stainless steel AISI 410 substrate used for tool manufacturing. The mechanical parameters between the interacting surfaces such as thickness, adhesion and hardness were measured. By means of the scanning electron microscope (SEM) the superficial morphology of the Ti/TiN interface was observed, finding that the growth was of columnar grains and by means of EDAX the existence of titanium was verified.  Using X-ray diffraction (XRD) it was possible to observe the presence of residual stresses (~ -3.1 GPa) due to the different crystalline phases in the coating. Under X-ray photoemission spectroscopy (XPS) it was possible to observe the molecular chemical composition of the coating surface, being Ti-N, Ti-N-O and Ti-O the predominant ones.

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