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Modeling microwave drying kinetics and moisture diffusivity of Mabonde banana variety

international Journal of Agricultural and Biological Engineering 2014年第6期7卷 107-113页

作者： Adewale o.omolola afam i.o.jideani Patrick F.Kapila Department of Food Science and Technology School of AgricultureUniversity of VendaThohoyandou 0950South Africa Department of Agricultural and Rural Engineering School of AgricultureUniversity of VendaThohoyandou 0950South Africa

This study investigates the microwave drying kinetics of thin layer Mabonde banana variety(MBV)at power levels between 100 and 300 *** mathematical drying models:Wang and Singh,Verma,Two-term,Page,Two term exponential,and Logarithmic models were fitted to experimental drying data obtained from the *** statistical consistency of the models was determined using statistical parameters including coefficient of determination,mean bias error,root mean square error,and reduced Chi *** migration from banana slices was described using the Fick’s diffusion *** effective diffusivity was *** results indicated that drying took place largely in the falling rate *** time required to reduce the moisture of banana to a certain level was dependent on the microwave output,being the longest at 100 W and shortest at 300 *** effective moisture diffusivity increased with increasing microwave power with values at 4.89×10^(-10),1.09×10^(-9) and 1.69×10^(-9) m^(2)/s at 100,200,and 300 W,*** Wang and Singh model gave the best results for the description of thin layer drying of MBV.

关键词： Mabonde banana variety microwave drying models drying kinetics effective moisture diffusivity

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oil and Gas Resources Management and Environmental Challenges in Nigeria

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Journal of Environmental Science and Engineering(B) 2012年第4期1卷 535-542页

作者： Chizoba Chinweze Gwen Abiola-oloke Chike jideani Chemtek Associates Lagos 234 Nigeria Continental Bank Cotonou 229 Republic of Benin Starwood Development Limited Abuja 234 Nigeria

Nigeria is richly endowed with crude oil and natural gas deposits, which are the country＇s main source of energy and foreign exchange earnings. These deposits are concentrated at the Niger Delta region which has attracted the presence of multinational oil/gas companies to the area. This paper analyses the impact of oil and gas development on the rich biological diversity of the region and its consequences on the development of the region and the nation at large. The paper further reviews the abject poverty of the oil/gas producing communities whose source of livelihoods, fisheries resources, agricultural soils/farmlands, forests, clean water, fresh air and housing are being destroyed due to poor energy resource management. The magnitude of destruction and frustration is reflected in unending conflict and insecurity in the region leading to many shut-in productions which pose a governance challenge as the country＇s economy and development is heavily dependent on oil and gas production.

关键词： Energy resources management poverty governance challenges conflicts and development.

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