
Govt. College of Arts,Science & Commerce, Khandola, Marcela-Goa
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Catalysts for Electro-Oxidation of Methanol
(Goa University, 1999) Samant, Purnakala V.
Experimental validation of vapor-phase direct methanol fuel cell with Pt-Ru/Zeolite electrocatalyst
(Elsevier, 2025) Naik, Arti K.; Samant, Purnakala V.; Mordekar, Rajashri Karmali
This study investigates the performance of a vapor-phase Direct Methanol Fuel Cell (DMFC) utilising a Pt-Ru/Zeolite (Pt-Ru/HY) electrocatalyst. The anode material, loaded with 2 wt% metal supported on zeolite (HY), demonstrates superior output voltage and power density compared to conventional Pt/C catalysts inspite of lower noble metal dosage. A Nafion membrane, operating under humidified conditions, effectively enhances proton conductivity and serves as a solid electrolyte. To comprehensively understand fuel cell behavior, a mathematical model is executed for theoretical calculation of diffusion, conductivity, permeability, and Nafion proton conductivity. Experimental validation is conducted by systematically varying operating conditions such as methanol concentration, flow rate, pre-humidified and dehumidified oxygen pressure, and temperature. The study reveals the significance of humidifying both the anode and cathode compartments for reducing voltage losses and increasing power output without much fuel loss. The obtained polarisation curves closely resemble those of traditional DMFCs, confirming the catalyst's effectiveness. Furthermore, the stability of the Pt-Ru/HY catalyst is consistent with reduced ohmic losses, indicating its durability for long-term operation.
Sant Kabir key sahitya mey samaj sudhar / संत कबीर के साहित्य में समाज सुधार
(Ajanta Prakashan, 2025) Naik, Sachi
Relevance of Maratha and Goan Identity on Politics of Goa
(Kolkata Centre for Contemporary Studies, 2025) Varak, Nawoo
In Goa, the Maratha identity mobilizes the Bahujan castes horizontally, the ‘Goan’ identity maintains the social hierarchies vertically. While the political idea of Bahujan Maratha shapes the electoral politics in Goa, the social identity of ‘Goan’ counters it. The separation of social from the political maintains the hegemony of the dominant classes in Goa. The electoral politics in the post-colonial Goa comforted communal understanding of the identities for electoral gains. The political leadership in the state employs these identities to bargain with the national political parties. This article aims to trace the historical origin of both the identities and reflect on their transition caused by electoral politics. The Marathisation of the Goan identity attempts to democratise the public sphere in Goa by providing the historical background to the political assertion of bahujan castes.
A Strategic Study on Problems Faced by Women Entrepreneurs in Rural Goa: Emerging Needs and Challenges
(Dr. Barals Research Foundation, 2020) Sukthankar, Sitaram V.; Chari, Shravani V.; Singh, Chandra Shekhar; Rath, Ramesh Chandra
A women entrepreneur is any woman or a group of women who begin, organize and operate business enterprises for personal gain. Even though the concept of women entrepreneurs came into existence many years ago, the problems faced by them are rapidly increasing. The paper focuses on the various problems faced by the women entrepreneurs in Goa. The main objective of the paper is to analyse various problems faced by the women entrepreneurs and to find out the association between demographic profile & overall problems faced by them. The research is purely based on primary data i.e. questionnaire Method is used to collect the data from 104 respondents. The Variables used in the research are Personal, financial, human resource, Manpower, natural Resources of raw –Materials, technological, infrastructural & administrative problems & the techniques used are Descriptive Statistics, Chi Squared Test & Regression Analysis.
The findings of the study are that the personal, financial, human resource, raw material, technological, infrastructural & administrative problems show a positive influence on the overall problems faced by the women in rural areas and there is no association of age, qualification, marital status, turnover and monthly income on the location of the women entrepreneurs in rural Goa.