Manipulating the Properties of Poly(1,4-Cyclohexylenedimethylene Terephthalate) (PCT) Just by Tuning Steric Configuration of 1.4-Cyclohexanedimethanol (CHDM)

2018 ◽  
Vol 219 (16) ◽  
pp. 1800172 ◽  
Author(s):  
Jinggang Wang ◽  
Xiaoqing Liu ◽  
Jin Zhu
Keyword(s):  
Steric Configuration

A stereospecific synthesis of trisubstituted double bonds

1970 ◽  
Vol 23 (4) ◽  
pp. 813 ◽  
Author(s):  
AJ Birch ◽  
B McKague
Keyword(s):  
Double Bond ◽  
Stereospecific Synthesis ◽  
Considerable Proportion ◽  
Double Bonds ◽  
Steric Configuration

An aspect of the synthesis of sterically defined trisubstituted double bonds is discussed. Metal-ammonia reductions of hydropyridinium salts such as (1 ; R, R' = H or Me) result in allylic fissions, with a considerable proportion of double bond retention in its original situation and complete retention of the original steric configuration in that position.

scholarly journals Steric Configuration of the α,β-Diaminobutyric Acid Isolated from the Antibiotic Glumamycin

1961 ◽  
Vol 34 (5) ◽  
pp. 740-740 ◽  
Author(s):  
Masahiko Fujino ◽  
Michitaka Inoue ◽  
Jisaburo Ueyanagi ◽  
Akira Miyake
Keyword(s):  
Diaminobutyric Acid ◽  
Steric Configuration

Effect of degree of polymerization and steric configuration of poly(2-vinylpyridine) as catalyst in the polymerization of phenylalanine NCA

Biopolymers ◽  
1973 ◽  
Vol 12 (1) ◽  
pp. 181-191 ◽  
Author(s):  
Yukio Imanishi ◽  
Shoji Nagaoka ◽  
Kazuhiro Suzuoki ◽  
Toshinobu Higashimura
Keyword(s):  
Degree Of Polymerization ◽  
Steric Configuration

The Influence of Steric Configuration on the Ultraviolet Absorption of “Fixed” Benzils1,2

1955 ◽  
Vol 77 (19) ◽  
pp. 5078-5083 ◽  
Author(s):  
Nelson J. Leonard ◽  
A. Jerry Kresge ◽  
Michinori Ōki
Keyword(s):  
Ultraviolet Absorption ◽  
Steric Configuration

High selective distinguishable detection GSH and H2S based on steric configuration of molecular in Vivo

2020 ◽  
Vol 172 ◽  
pp. 107826 ◽  
Author(s):  
Jing Li ◽  
Caixia Yin ◽  
Yongbin Zhang ◽  
Yongkang yue ◽  
Jianbin Chao ◽  
...  
Keyword(s):  
Steric Configuration

Insulin and Tissue Distribution of Pentose in Nephrectomized Cats

1957 ◽  
Vol 189 (2) ◽  
pp. 339-342 ◽  
Author(s):  
Jacob Sacks ◽  
Stanley Bakshy
Keyword(s):  
Cell Membrane ◽  
Tissue Distribution ◽  
Insulin Injection ◽  
The Other ◽  
Exogenous Insulin ◽  
Apparent Effect ◽  
Cell Interior ◽  
Intracellular Compartment ◽  
Phosphorylation Reaction ◽  
Steric Configuration

A comparison has been made of the ‘pentose space’ and ‘chloride space’ of various tissues in the nephrectomized cat injected intravenously with various pentoses, and of the effect of insulin injection on the pentose space. The four pentoses tested, d- and l-arabinose and D- and L-xylose, were found to pass readily into the intracellular compartment of liver. With this exception, and the apparent failure to penetrate the blood-brain barrier, d-arabinose and l-xylose, which have steric configurations about carbon atoms 1, 2 and 3 opposite to that of D-glucose, showed purely extracellular distribution which was not affected by insulin. In the absence of exogenous insulin, extracellular distribution of L-arabinose and D-xylose was found in lung, intestine, skin, spleen and muscle; under these conditions brain and heart showed partial penetration of these sugars into the intracellular compartment. The injection of insulin resulted in partial intracellular penetration into muscle, increased penetration intracellularly in brain and heart, and was without apparent effect on the other tissues analyzed. The findings are discussed in terms of the postulate of Levine that insulin acts to facilitate the transfer across the cell membrane of glucose and of those sugars with the same steric configuration as D-gluclose about carbon atoms 1, 2 and 3. It is concluded that if the mechanism of transport of glucose across the cell membrane is the same as that of transport of these pentoses, then the entry of glucose into the cell interior precedes any phosphorylation reaction.

scholarly journals Coordination Chemistry of Ru(II) Complexes of an Asymmetric Bipyridine Analogue: Synergistic Effects of Supporting Ligand and Coordination Geometry on Reactivities

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 27
Author(s):  
Komi Akatsuka ◽  
Ryosuke Abe ◽  
Tsugiko Takase ◽  
Dai Oyama
Keyword(s):  
Coordination Compounds ◽  
Synergistic Effects ◽  
Electrochemical Analysis ◽  
Molecular Structures ◽  
Coordination Geometry ◽  
Polypyridyl Ligands ◽  
X Ray ◽  
Thermal Reactions ◽  
X Ray Crystallography ◽  
Steric Configuration

The reactivities of transition metal coordination compounds are often controlled by the environment around the coordination sphere. For ruthenium(II) complexes, differences in polypyridyl supporting ligands affect some types of reactivity despite identical coordination geometries. To evaluate the synergistic effects of (i) the supporting ligands, and (ii) the coordination geometry, a series of dicarbonyl–ruthenium(II) complexes that contain both asymmetric and symmetric bidentate polypyridyl ligands were synthesized. Molecular structures of the complexes were determined by X-ray crystallography to distinguish their steric configuration. Structural, computational, and electrochemical analysis revealed some differences between the isomers. Photo- and thermal reactions indicated that the reactivities of the complexes were significantly affected by both their structures and the ligands involved.

Effects of Concentration and Steric Configuration of Propranolol on AV Conduction and Ventricular Repolarization in the Dog

1981 ◽  
Vol 3 (4) ◽  
pp. 692-703 ◽  
Author(s):  
Leif Brorson ◽  
Stots Reele ◽  
William Dupont ◽  
Raymond Woosley ◽  
David Shand ◽  
...  
Keyword(s):  
Ventricular Repolarization ◽  
Av Conduction ◽  
Steric Configuration
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