COUPLED REACTIONS IN METAMORPHISM: A CORRECTION

1961 ◽  
Vol 72 (1) ◽  
pp. 169
Author(s):  
W. S. FYFE ◽  
F. J. TURNER ◽  
J. VERHOOGEN
Keyword(s):  
Coupled Reactions

Reactions in solution

2018 ◽  
Author(s):  
Dennis Sherwood ◽  
Paul Dalby
Keyword(s):  
Phase Equilibria ◽  
Gas Phase ◽  
First Principles ◽  
Unique Feature ◽  
Life Sciences ◽  
Equilibrium Mixture ◽  
Second Law ◽  
Ideal Solution ◽  
Coupled Reactions ◽  
Definition Of

Another key chapter, examining reactions in solution. Starting with the definition of an ideal solution, and then introducing Raoult’s law and Henry’s law, this chapter then draws on the results of Chapter 14 (gas phase equilibria) to derive the corresponding results for equilibria in an ideal solution. A unique feature of this chapter is the analysis of coupled reactions, once again using first principles to show how the coupling of an endergonic reaction to a suitable exergonic reaction results in an equilibrium mixture in which the products of the endergonic reaction are present in much higher quantity. This demonstrates how coupled reactions can cause entropy-reducing events to take place without breaking the Second Law, so setting the scene for the future chapters on applications of thermodynamics to the life sciences, especially chapter 24 on bioenergetics.

Facilitated proton transfer-electron transfer coupled reactions at thick-film modified electrodes

2017 ◽  
Vol 258 ◽  
pp. 727-734 ◽  
Author(s):  
Franco Martín Zanotto ◽  
Ricardo Ariel Fernández ◽  
Sergio Alberto Dassie
Keyword(s):  
Electron Transfer ◽  
Proton Transfer ◽  
Thick Film ◽  
Modified Electrodes ◽  
Coupled Reactions

The Coupled-Reactions Model

2018 ◽  
pp. 171-174
Author(s):  
Edward K. Yeargers
Keyword(s):  
Coupled Reactions

Coupled Reactions of Condensation and Charge Transfer. 1. Formation of Olefin Dimer Ions in Reactions with Ionized Aromatics. Gas-Phase Studies

1997 ◽  
Vol 119 (35) ◽  
pp. 8332-8341 ◽  
Author(s):  
Michael Meot-Ner (Mautne ◽  
Yezdi B. Pithawalla ◽  
Junling Gao ◽  
M. Samy El-Shall
Keyword(s):  
Charge Transfer ◽  
Gas Phase ◽  
Coupled Reactions

Isopropylidine maltoheptosyl fructofuranoside, doubly blocked substrate for determination of endoamylase activity

1991 ◽  
Vol 37 (8) ◽  
pp. 1323-1328
Author(s):  
Z Ogawa ◽  
Y Matsubayashi ◽  
S Satoh ◽  
N Orita ◽  
H Itoh
Keyword(s):  
Human Serum ◽  
Coefficient Of Variation ◽  
Oxidation Rate ◽  
Amylase Activity ◽  
Mannitol Dehydrogenase ◽  
Coupled Reactions ◽  
Alpha Glucosidase ◽  
Serum And Urine

Abstract We synthesized o-(4,6-o-isopropylidene-alpha-D-glucopyranosyl)-(1----4)- [o-alpha-D-glucopyranosyl-(1----4])5-o-alpha-D-glucopyranosyl-(1----2)- alpha-D-fructofuranoside (IPG7F) and developed an assay for determining the activity of amylase in human serum and urine by using this substrate. Glucoamylase, alpha-glucosidase, and mannitol dehydrogenase are used as coupling enzymes. The coupled reactions are monitored by continuously measuring the oxidation rate of NADH. In this procedure, various substances in the test specimens do not interfere with the detection of amylase activity. Exactly one molecule of NADH is oxidized by one attack of amylase on the substrate, although four products can be produced in the reaction. The within-assay coefficient of variation (CV) ranged from 1.0% to 4.1% and the between-assay CV ranged from 2.6% to 5.3%. The results of our new assay correlate well with those of the amylase assay involving p-nitrophenol maltoheptaoside as substrate (r = 0.978) and with those of the amylase assay involving maltopentaose (r = 0.987).

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