Raman Spectroscopic Observation of a Conformational Change at the Heme-Protein Linkage in Myoglobin at High Pressure

1995 ◽  
Vol 117 (40) ◽  
pp. 10149-10150 ◽  
Author(s):  
A. Schulte ◽  
S. Buchter ◽  
O. Galkin ◽  
C. Williams
Keyword(s):  
High Pressure ◽  
Conformational Change ◽  
Spectroscopic Observation ◽  
Heme Protein ◽  
Raman Spectroscopic

Micro-Raman Spectroscopic Observation of Water Expulsion Induced Destruction of Hydrophobic Clusters in Crystalline Lysozyme

2009 ◽  
Vol 113 (29) ◽  
pp. 9633-9635 ◽  
Author(s):  
Jing-Jing Shou ◽  
Guang Zeng ◽  
Yun-Hong Zhang ◽  
G. Q. (Max) Lu
Keyword(s):  
Spectroscopic Observation ◽  
Raman Spectroscopic

High-Pressure–High Temperature (HP-HT) Stability of Polytetrafluoroethylene: Raman Spectroscopic Study Up to 10 GPa and 600 ℃

2017 ◽  
Vol 71 (8) ◽  
pp. 1842-1848 ◽  
Author(s):  
Anna Yu. Likhacheva ◽  
Artem D. Chanyshev ◽  
Sergey V. Goryainov ◽  
Sergey V. Rashchenko ◽  
Konstantin D. Litasov
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
High Pressure High Temperature

In situ Raman Spectroscopic Observation of Polymer Chains in Semi-Crystalline Polyethylene Solids

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yusuke Hiejima ◽  
Takumitsu Kida ◽  
Koh-hei Nitta
Keyword(s):  
Conformational Changes ◽  
Tensile Elongation ◽  
Spectroscopic Observation ◽  
Polymer Chains ◽  
Trans Conformation ◽  
Raman Spectroscopic ◽  
Higher Temperature ◽  
Microscopic Origin ◽  
Crystalline Polyethylene

AbstractIn situ Raman spectroscopy is applied for polyethylene solid under various environments to elucidate the morphological and conformational changes. The trans conformation retains up to higher temperature for high-density polyethylene, reflecting higher stability of the orthorhombic crystals composed of stacked trans chains. It is suggested that the conversion of the non-crystalline trans chains to the crystalline phase is the microscopic origin of thermal history in the crystallinity, whereas the transformation between the trans and gauche conformers is practically in thermal equilibrium. Microscopic and dynamic mechanism of deformation during uniaxial stretching is investigated for the molecular orientation and the microscopic load sharing on the crystalline and amorphous chains. Lower crystallinity results in smoother and higher orientation toward the stretching direction, as well as higher load on the amorphous chains, during tensile elongation.

High pressure Raman spectroscopic study of structural polymorphismin cyclohexane

2004 ◽  
Vol 84 (26) ◽  
pp. 5452-5454 ◽  
Author(s):  
Michael G. Pravica ◽  
Yongrong Shen ◽  
Malcolm F. Nicol
Keyword(s):  
High Pressure ◽  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study
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