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Varanasi, J.L.,Nayak, A.K.,Sohn, Y.,Pradhan, D.,Das, D. Pergamon Press 2016 ELECTROCHIMICA ACTA Vol.199 No.-
The anode of microbial fuel cell was impregnated with tungsten oxide (WO<SUB>3</SUB>) and platinum-tungsten oxide (Pt/WO<SUB>3</SUB>) nanocomposites to improve its power generation. The amended anodes were tested against pure and mixed culture type of biocatalysts. Improved performance was exhibited by the modified electrodes as compared to the uncatalyzed electrodes using both biocatalysts. However, pure culture showed higher power outputs as compared to the enriched mixed consortia. The maximum power density up to 0.15mWcm<SUP>-2</SUP> (1.46Wm<SUP>-2</SUP>) was obtained using pure culture which was almost 45% higher as compared to uncatalyzed electrodes. The anode modification also helped in lowering the charge transfer resistance and improving the coulombic efficiencies of the MFCs. High capacitance with nanostructure catalysts implied their role in holding an electric charge while SEM and epifluorescent images revealed enhanced bacterial adhesion. The high electrode conductivity, stability, and biocompatibility of the modified anodes make them more attractive for practical microbial fuel cell applications.
Labor supply of married foreign-born women in credit-constrained households
Kim, Seik,Varanasi, Nalina Butterworths 2019 Economic modelling Vol.81 No.-
<P><B>Abstract</B></P> <P>In credit-constrained households, some family members who would otherwise not work participate in the labor market. This particular supply of labor, however, is expected to decrease when their families overcome credit constraints. To examine this family investment hypothesis, we develop a test which exploits the dynamic features of the labor supply of married foreign-born women in the United States. Empirical findings, based on the matched March Current Population Survey, are consistent with the hypothesis. This paper also finds that previous results which refute the hypothesis are reversed when the sample is confined to women working in low-skill jobs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We examine the family investment hypothesis using a dynamic labor supply model. </LI> <LI> Our approach produces implications for the occupations and work hours of married women in credit-constrained households. </LI> <LI> To test the family investment hypothesis, the sample must be confined to women working in low skilled jobs. </LI> <LI> Our results, based on the matched March Current Population Survey, support the family investment hypothesis. </LI> <LI> We find a logic that reconciles the contradicting results found in previous papers. </LI> </UL> </P>