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Chitin oligomers and monomers production by coupling g radiation and enzymatic hydrolysis
M. Dziril,H. Grib,H. Laribi-Habchi,N. Drouiche,N. Abdi,H. Lounici,A. Pauss,N. Mameri 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The main purpose of this study was the chitin enzymatic hydrolysis enhancement by a pretreatment, consisting of chitin exposure to gamma radiation at several doses, ranging from 15 kGy to 210 kGy. The solid chitin molecular weight reduction achieved by Co-60 gamma rays treatment reached a 90% rate at the t used, with a dose of 210 kGy. The partial depolymerization of chitin was realized by irradiation allowing an enzyme affinity increase toward this substrate. The monomers and oligomers obtained from their radiated chitin production rate were almost 100%. It was also demonstrated that the NAG production by enzymatic hydrolysis of irradiated chitin at 210 Gy follows Michaelis–Menton kinetics.
Device characteristics and tight binding based modeling of bilayer graphene field-effect transistor
N. Ghobadi,Y. Abdi 한국물리학회 2013 Current Applied Physics Vol.13 No.6
In this work the device characteristic of bilayer graphene MOSFET is investigated by calculation of transmission coefficient using tight-binding method. The real shape of applied potential on the bilayer graphene was included in the tight binding calculation. As obtained transmission coefficient is used to explore the currentevoltage characteristics of the device in both on and off regimes. Electrical behavior of the device was obtained for different gate and drains voltages and channel length.