Influence of substrate concentration on the stability and yield of continuous biohydrogen production

2006 ◽  
Vol 93 (5) ◽  
pp. 971-979 ◽  
Author(s):  
G. Kyazze ◽  
N. Martinez-Perez ◽  
R. Dinsdale ◽  
G.C. Premier ◽  
F.R. Hawkes ◽  
...  
Keyword(s):  
Substrate Concentration ◽  
Biohydrogen Production ◽  
Influence Of Substrate ◽  
The Stability

Modeling of the enzymatic kinetic synthesis of cephalexin-Influence of substrate concentration and temperature

2001 ◽  
Vol 73 (3) ◽  
pp. 171-178 ◽  
Author(s):  
C. G. P. H. Schroën ◽  
V. A. Nierstrasz ◽  
H. M. Moody ◽  
M. J. Hoogschagen ◽  
P. J. Kroon ◽  
...  
Keyword(s):  
Substrate Concentration ◽  
Influence Of Substrate

Influence of substrate concentration on the activation of transketolase, aspartate aminotransferase, and glutathione reductase by coenzymes.

1984 ◽  
Vol 30 (1) ◽  
pp. 143-144
Author(s):  
J C Hafkenscheid ◽  
C M van Dijk
Keyword(s):  
Catalytic Activity ◽  
Glutathione Reductase ◽  
Aspartate Aminotransferase ◽  
Substrate Concentration ◽  
Activity Concentrations ◽  
Influence Of Substrate ◽  
Underlying Mechanisms ◽  
Substrate Concentrations

Abstract We investigated the mechanism by which the three most commonly measured enzymes in erythrocytes are activated by their respective coenzymes by determining the catalytic activity concentrations of transketolase (EC 2.2.1.1), aspartate aminotransferase (EC 2.6.1.1), and glutathione reductase (EC 1.6.4.2) in relation to various substrate concentrations. We conclude that the underlying mechanisms by which the enzymes are activated are not the same.

scholarly journals Dynamics Analysis and Biomass Productivity Optimisation of a Microbial Cultivation Process through Substrate Regulation

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Kaibiao Sun ◽  
Shan Liu ◽  
Andrzej Kasperski ◽  
Yuan Tian
Keyword(s):  
Periodic Solution ◽  
Substrate Concentration ◽  
Process Model ◽  
Biomass Productivity ◽  
High Yield ◽  
Dynamics Analysis ◽  
State Dependent ◽  
Cultivation Process ◽  
Microbial Cultivation ◽  
The Stability

A microbial cultivation process model with variable biomass yield, control of substrate concentration, and biomass recycle is formulated, where the biochemical kinetics follows an extension of the Monod and Contois models. Control of substrate concentration allows for indirect monitoring of biomass and dissolved oxygen concentrations and consequently obtaining high yield and productivity of biomass. Dynamics analysis of the proposed model is carried out and the existence of order-1 periodic solution is deduced with a formulation of the period, which provides a theoretical possibility to convert the state-dependent control to a periodic one while keeping the dynamics unchanged. Moreover, the stability of the order-1 periodic solution is verified by a geometric method. The stability ensures a certain robustness of the adopted control; that is, even with an inaccurately detected substrate concentration or a deviation, the system will be always stable at the order-1 periodic solution under the control. The simulations are carried out to complement the theoretical results and optimisation of the biomass productivity is presented.

Biohydrogen Production as a Function of pH and Substrate Concentration

2001 ◽  
Vol 35 (24) ◽  
pp. 4726-4730 ◽  
Author(s):  
Steven Van Ginkel ◽  
Shihwu Sung ◽  
Jiunn-Jyi Lay
Keyword(s):  
Substrate Concentration ◽  
Biohydrogen Production
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