Iron(III) Complexes of Tridentate 3N Ligands as Functional Models for Catechol Dioxygenases:  The Role of LigandN-alkyl Substitution and Solvent on Reaction Rate and Product Selectivity

2007 ◽  
Vol 46 (24) ◽  
pp. 10294-10306 ◽  
Author(s):  
Kusalendiran Visvaganesan ◽  
Ramasamy Mayilmurugan ◽  
Eringathodi Suresh ◽  
Mallayan Palaniandavar
Keyword(s):  
Reaction Rate ◽  
Product Selectivity ◽  
Alkyl Substitution ◽  
Functional Models ◽  
Catechol Dioxygenases

scholarly journals Capital Structure-Firm Value Nexus: Moderating Role of Profitability

2020 ◽  
Vol 11 (2) ◽  
pp. 375-386
Author(s):  
Hamed Ahmad Almahadin ◽  
Yazan Salameh Oroud
Keyword(s):  
Capital Structure ◽  
Firm Value ◽  
Panel Data Analysis ◽  
Policy Implications ◽  
Ample Evidence ◽  
Functional Models ◽  
The Impact ◽  
The Relationship ◽  
Moderating Role

This study aims to investigate the moderating role of profitability in the relationship between capital structure and firm value in Jordan, as an example of an emerging economy. For this purpose, two functional models were formulated to capture the direct relationship as well as the interaction impact of capital structure on firm value. The robust empirical findings of panel data analysis provide strong evidence of an adverse relationship between capital structure and firm value. The findings confirm that the impact of capital structure appears to be complicated in nature and difficult to examine without controlling for the interaction of profitability as one of the major determinants. Therefore, studying the interaction effect provides ample evidence and enhances the understanding of the link between firm value and capital structure. The empirical results of the study may provide important insights and policy implications to decision-makers.

THE ROLE OF ALPHA-KETOLS IN THE LOW-SUGAR REDOX RECIPE FOR LOW TEMPERATURE EMULSION COPOLYMERIZATION

1951 ◽  
Vol 29 (11) ◽  
pp. 949-958
Author(s):  
R. J. Orr ◽  
H. Leverne Williams
Keyword(s):  
Free Radical ◽  
Ferrous Iron ◽  
Reaction Rate ◽  
Catalyst System ◽  
Emulsion Copolymerization ◽  
Peroxy Compounds ◽  
Induced Decomposition ◽  
Amine Compounds ◽  
Better Than

It was found that the induced decomposition of peroxy compounds could lead to faster rates of polymerization or practical rates of polymerization at lower temperatures. In Germany polymerization recipes were developed containing a peroxy compound in the oil phase, a reducer in the aqueous phase and a metal carrier. This idea was transferred to America after the war and became the basis of the present recipes used in the production of cold rubbers. As reducers the most commonly used appear to be digested d-glucose or an excess of ferrous iron but recently the polyamines and other amine compounds have been found to be quite effective. The mixture of amine and sugar was better than either alone. It has been shown that this mixture will function in the presence of reactive monomers such as acrylonitrile. The role of such reducers is of considerable interest so that further studies were undertaken. The results obtained may be illustrated by acetoin. As the amount of acetoin is increased in the recipe the amount of ferrous iron required for maximal conversion in a given time is decreased. This is because at higher than the optimal amounts, although the reaction rate is still increasing, the catalyst system is rapidly exhausted so that the reaction dies at a lower conversion. The data can be explained by assuming formation of free radicals by the induced decomposition of the peroxide either by the acetoin, the ferrous iron, or a complex between the iron and acetoin. This free radical then initiates polymerization. The acetoin free radical residue can induce the further decomposition of the peroxide or possibly can reduce ferric iron to ferrous. Other compounds yield similar results.

THE ROLE OF ADSORPTION IN CONTROLLING THE RATE OF REACTION OF CHLORAMBUCIL WITH PROTEIN

1963 ◽  
Vol 41 (4) ◽  
pp. 931-939 ◽  
Author(s):  
J. H. Linford
Keyword(s):  
Molecular Weight ◽  
Carboxylic Acid ◽  
Bovine Serum Albumin ◽  
Inverse Relationship ◽  
Reaction Rate ◽  
The Other ◽  
Alkylation Reaction ◽  
Rate Of Reaction

Two proteins, haemoglobin and bovine serum albumin, have been studied with respect to their rates of alkylation by chlorambucil in vitro at 37 °C and pH 8.4. The proteins are of nearly the same molecular weight and free carboxylic acid content, but the alkylation reaction is 30 times faster with haemoglobin. On the other hand, the adsorption of chlorambucil by albumin is 20 times greater than that exhibited by haemoglobin. This inverse relationship between extent of adsorption and reaction rate suggests that adsorption protects the chlorambucil from activation in the solvent.

The role of in situ generated morphological motifs and Cu(i) species in C2+ product selectivity during CO2 pulsed electroreduction

Nature Energy ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 317-325 ◽  
Author(s):  
Rosa M. Arán-Ais ◽  
Fabian Scholten ◽  
Sebastian Kunze ◽  
Rubén Rizo ◽  
Beatriz Roldan Cuenya
Keyword(s):  
Product Selectivity

Model Studies of Catechol Dioxygenases. Important Role of Monodentate Catecholate-Iron(III) Intermediate

1993 ◽  
Vol 66 (5) ◽  
pp. 1408-1419 ◽  
Author(s):  
Satoshi Fujii ◽  
Hiroaki Ohya-Nishiguchi ◽  
Noboru Hirota ◽  
Akira Nishinaga
Keyword(s):  
Model Studies ◽  
Catechol Dioxygenases
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