Direct fermentation of 226 white rose tapioca stem to ethanol by Fusarium oxysporum was studied in a batch reactor. Fermentation of ethanol can be achieved by sequential pretreatment using dilute acid and dilute alkali solutions using 100 mesh tapioca stem particles. The quantitative effects of substrate concentration, pH and temperature on ethanol concentration were optimized using a full fact...

Poly-β-hydroxybutyrate (PHB) is one of the most famous biopolymers that has various applications in production of biodegradable carriers. The most important strategy for enhancing efficiency in production process and reducing the price of PHB, is the accurate expression of kinetic model of products formation and parameters that are effective on it, such as Dry Cell Weight (DCW) and substrate co...

At CHES 2003, Piret and Quisquater published a very efficient DFA on AES which has served as a basis for many variants published afterwards. In this paper, we revisit P&Q’s DFA on AES and we explain how this attack can be much more efficient than originally claimed. In particular, we show that only 2 (resp. 3) faulty ciphertexts allow an attacker to efficiently recover the key in the case of AE...

Plasmonics can enhance solar energy conversion in semiconductors by light trapping, hot electron transfer, and plasmon-induced resonance energy transfer (PIRET). The multifaceted response of the plasmon and multiple interaction pathways with the semiconductor makes optimization challenging, hindering design of efficient plasmonic architectures. Therefore, in this paper we use a density matrix m...

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...