The accumulation of polyhydroxyalkanoates (PHAs) by microorganisms usually occurs in response to environmental stress conditions. Therefore, it is advantageous choose two-step cultivation. first phase aimed at maximizing biomass production, and only the second phase, after setting suitable conditions, PHA production starts. aim this work was optimize composition minimal propagation medium used ...

Background: Schizophyllum commune, is one of the important medicinal-fungi foods in the world. Due to its important constituents such as extracellular and intracellular polysaccharides, it is widely used in industry and medicine. One of the important polysaccharides of this fungus is chitin-glucan complex (CGC). The aim of this study was to investigate the growth of native fungus Schizophyllum ...

background: bromide is found naturally in groundwater and surface water. the rapid growth of industrial activities, drainage of surface runoff, and use of methyl bromide in pesticides has increased bromide discharge to the environment. disinfection of water-containing bromide causes the creation of additional products of organo-halogenated that are considered cancer-causing agents. in this stud...

10 Global optimization can be used as the main component for reliable decision support systems. In this contribution, we explore numerical solution techniques for nonconvex and nondifferentiable economic optimal growth models. As an illustrative example, we consider the optimal control problem of choosing the optimal greenhouse gas emissions abatement to avoid or delay abrupt and irreversible c...

We consider the finite element discretization of semilinear parabolic optimization problems subject to pointwise in time constraints on mean values of the state variable. In contrast to many results in numerical analysis of optimization problems subject to semilinear parabolic equations, we assume weak second order sufficient conditions. Relying on the resulting quadratic growth condition of th...