in view of the increase in saccharomyces cerevisiae mannan content, the culture condition for s.cerevisiae were optimized in this study. the influence of culture condition such as original ph, inoculum size, and temperature on mannan production were evaluated using response surface methodology. the mathematical model was established by the quadratic rotary combination design. with the order of ...

BACKGROUND The nisin-controlled gene expression system NICE of Lactococcus lactis is one of the most widely used expression systems in Gram-positive bacteria. Despite its widespread use, no optimization of the culture conditions and nisin induction has been carried out to obtain maximum yields. As a model system induced production of lysostaphin, an antibacterial protein (mainly against Staphyl...

Sanitization by pH adjustment of dairy and pig slurries was evaluated for potential use as organic fertilizer in horticulture. This requires absence Salmonella 25 g slurry less than 1000 Escherichi coli colony-forming unit per gram fresh (Regulation (EU) 2019/1009). Additives used the alkalinization acidification treatments, included hydroxide-salts nitrogen-based reactants to increase a basic ...

Abstract A data-based multivariate method such as response surface methods and desirability function is considered advantageous for analysing coagulation treatment optimization. Thus, this study investigated the optimization of coagulation–flocculation using methodology. The parameters were pH, alum dose alkalinity. optimum conditions individual responses: turbidity, colour, residual aluminium ...

In this paper, a control algorithm is proposed for pH sensitive nanorobots to deliver drugs in the tumor area while navigating in the blood stream environment. The nanorobots are able to communicate with their neighbors using the Particle Swarm Optimization algorithm. Furthermore, the obstacle avoidance algorithm allows the nanorobots to avoid collision with the blood cells. Each nanorobot can ...

in this paper we study the concept of ph-biatness ofa banach algebra a, where ph is a continuous homomorphism on a.we prove that if ph is a continuous epimorphism on a and a hasa bounded approximate identity and a is ph- biat, then a is ph-amenable. in the case where ph is an isomorphism on a we showthat the ph- amenability of a implies its ph-biatness.

The several industrial applications of lipases have stimulated interest in isolation of new enzymes from novel sources. In this study, the lipase production from Trichoderma atroviride 676 was optimized by statistical design methods. The response surface methodology based on 3(3-1) fractional factorial, showed that the yeast extract and MgSO4 played a significant role on lipase production, yiel...