Reaction rate maximum specific growth

The two parameters in Eq. (7-92) are the maximum specific growth rate pmax (h-1) and the saturation constant K, (g substrate/L). The value of K. is obtained as the substrate concentration at which p = 1h pm (see Fig. 7-6). The form of Eq. (7-92) is entirely empirical, but it incorporates two important features (1) At high substrate concentration the whole cell machinery is involved in cell synthesis, and the specific growth rate reaches a maximum pmax (2) at low substrate concentration formation of biomass is a first-order rate process (as in any other chemical reaction) and p -> (pmax/Ks)Cs. Note that for many commonly used microorganisms Ks is much... 

Maximum specific growth rate rx,max h meant as a state, where no external substrate is limiting, but a—in most cases not known— intracellular step. The metabolism of the cell consists of physical and enzymatically catalyzed steps, which may differently react to different temperatures. Especially for microalgae, the photosynthetic apparatus down to proton transport through the thylakoid membrane as a transport step could react differently from the anabolic reactions. Explanations and first model approaches for combined temperature/Hght effects are given in Bechet et al (2013), Bernard and Remond (2012), and Yun and Park (2003). 

Also discussed are precipitation specific experimental techniques, such as supersaturation measurements, constant composition (CC) method, instantaneous mixing devices, maximum (critical) growth rate experiments, and sizing. Due to the intrinsic difficulties with the direct supersaturation measurements and the microsecond characteristic time scale of precipitation reaction and nucleation, the CC method is used to study the precipitation kinetics. For the same reasons, the critical growth experiments are used to delineate the domain of the reactant feed rate that assures a renucleation-free process and a unimodal CSD. 

Their data were used to calculate the specific reaction rate constant of the oligomer with molybdate by assuming that the time required to reach maximum color was when 99% had reacted and by taking into account the amount of monomer originally present. It is assumed that at any one time the oligomer molecules are all about the same size, since otherwise spontaneous particle growth... 

Maximum reaction rate = 0.1 moles/L min Michaelis constant = 0.035 M Initial substrate concentration = 0.001 M Microbial specific growth reaction rate = 0.1 (h) ... 

Earlier by us it has been established that oxidation reactions of considered hydrocarbons (ethylbenzene, toluene and cumene) by molecular oxygen, catalyzed with system Ni(II)(L )2+L (L = N-methylpirrolidon-2 (MP)) are characterized with general kinetic regularities. As well as at oxidation of ethylbenzene, synergic effects of growth of initial rates of oxidation of toluene and cumene, and also <5 ooh degree of conversion of oxidation in ROOH in presence of system Ni(II)(L )2+L are observed, and maximum possible values of these parameters are received in the optimal conditions of researched oxidations. However, there are differences, which are connected with specificity of each hydrocarbon [17]. 

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