Five different mutant strains were developed from the wild strain of Saccharomyces cerevisiae (MTCC No.287) using UV irradiation technique by varying the exposure timings. All the mutant cultures were used for ethanol production using banana peel as a substrate in a batch fermenter. The effect of temperature, pH and initial substrate concentration on ethanol production were studied and optimize...

A construction is described of high-rate RS-like convolutional codes, and a lower bound is given on their free distance. These codes can be used to construct asymptotically good binary convolutional codes. 1. Introduetion I~ a preceding report 4), a class of RS-like convolutional codes was introduced. These codes were obtained only for length n, rate R = kln and constraint length 'll related by...

The Hamilton-Jacobi equation for the low energy string effective action is solved using the gradient expansion method. The field equations are also expanded by the number of spatial gradients and the second order solution is found for the three-metric. The second order solution allows us to study the influence of initial inhomogeneities to the duration of pre-big bang superinflation. We conclud...

The transition from eco-harmful chemical processes to bio-based production of organics has been challenged by the complex nature fermentation processes. growth kinetics and modelling oxalic acid cassava whey Aspergillus niger (MW188538) was studied in a batch system. study fitted into Monod, Leudeking-Piret Andrews kinetic models. acid, reducing sugar, cell dry weights were determined according...

A mathematical modeling of microalgae biomass is an essential step to optimize the biomass and lipid production rate and to reduce the cost of microalgal biodiesel production system. In the present study, kinetic studies were carried out to describe the growth and neutral lipid production of two marine microalgae Chlorella salina and Nannochloropsis oculata under the nitrogen-repleted and -depl...

Mangrove sediments host rich assemblages of microorganisms, predominantly mixed bacterial cultures, which can be efficiently used for biohydrogen production through anaerobic dark fermentation. The influence of process parameters such as effect of initial glucose concentration, initial medium pH, and trace metal (Fe(2+)) concentration was investigated in this study. A maximum hydrogen yield of ...

Studies on Simultaneous Saccharification and Fermentation (SSF) of corn flour, a major agricultural product as the substrate using starch digesting glucoamylase enzyme derived from Aspergillus niger and non starch digesting and sugar fermenting Saccharomyces cerevisiae in a batch fermentation. Experiments based on Central Composite Design (CCD) were conducted to study the effect of substrate co...

The field equations derived from the low energy string effective action with a matter tensor describing a perfect fluid with a barotropic equation of state are solved iteratively using the long-wavelength approximation, i.e. the field equations are expanded by the number of spatial gradients. In the zero order, a quasi-isotropic solution is presented and compared with the general solution of th...