Open Access Original Research Article

Virtual Water Consumption: A Case Study in a Higher Education Institution in Northeast Brazil

Patrícia da Silva Costa, Rener Luciano de Souza Ferraz, José Dantas Neto, Franklin Alves dos Anjos, Constantino Antônio Cavalcante Júnior, Newcélia Paiva Barreto, Aldair de Souza Medeiros, Marcelo de Andrade Barbosa, Ivomberg Dourado Magalhães, Suely de Lima Santos

Journal of Scientific Research and Reports, Page 1-12
DOI: 10.9734/JSRR/2018/39250

Water limitation has driven punctual global actions in search of efficient management strategies, to calculate the sustainability indices, as the water footprints can guide these efforts. With the aim of estimating the water footprint of the academic community of the Rural Health and Technology Center of the Federal University of Campina Grande, an exploratory study was carried out with sample groups of undergraduate and graduate courses of the unit. The exploratory research consisted of the application of questionnaires, the answers being processed in the calculator of the water footprint. The water footprint of the studied academic community is below the Brazilian average and higher than the global average, except for the degree course of the Masters in Veterinary Medicine, where the water footprint exceeded the national average. It was possible to reduce the twelve original variables into three latent variables, evidencing that the use of multivariate statistics was efficient in analysing the data of the water footprint.

Open Access Original Research Article

Borehole Water Quality Characteristics and Its Potability in Iwo, Osun State, Nigeria

O. T. Akinola, T. O. Ogunbode, E. O. Akintunde

Journal of Scientific Research and Reports, Page 1-8
DOI: 10.9734/JSRR/2018/38045

Human access to quality water is a prerequisite to a healthy living. Thus, a study aimed at assessing the spatial quality of borehole water in 16 different locations in Iwo, Osun State, Nigeria. The borehole water samples were subjected to physico-chemical and bacteriological analyses. The parameters analysed include pH, temperature, Electrical conductivity, Phosphate, Nitrate, Sulphate, Total Hardness, coliform and faecal coliforms. The results showed that the physico-chemical parameters were within the WHO limit, except for temperature and pH values which were above the WHO limits. Also, the bacteriological analyses showed that coliforms were present in 11 boreholes up to levels of 3 to 93 MPN/100 ml while only 5 boreholes showed zero coliform count while correlation analysis generally showed that most of the parameters are independent of one another. Bacteriological analysis results indicated that water from these sources may pose threat to human health by WHO standard if consumed. Hence, simple water treatment method such as boiling, regular disinfection and regular cleaning of borehole water storage tank as well as general education on proper disposal of sewage and location of boreholes are recommended. Further investigation on the quality analysis of borehole water in Iwo is required to ensure adequate monitoring of the quality parameters in the boreholes.

Open Access Original Research Article

Effect of Pretreatment on the Functional, Pasting and Baking Characteristics of Cocoyam Flour

O. Akinlua, S. S. Nupo, J. V. Akinlotan, Nofisat Sunmonu

Journal of Scientific Research and Reports, Page 1-7
DOI: 10.9734/JSRR/2018/26859

Cookies were produced from pretreated cocoyam flour (Xanthosoma sagittoforus). Pretreatment such as fermentation, blanching and soaking in potassium metabisulphite was done. The pretreated flours were used to bake cookies. Functional and pasting properties of the flours were determined. Packed capacity of the flours ranged from 0.95- 0.97 g/cm. The water absorption capacity ranged from 1.98-2.3 g/g. The oil absorption capacity and swelling power ranges from 1.97-2.08 g/g and 5.74 - 8.04 g/cm respectively. Fermented cocoyam flour had the highest peak, trough, breakdown, and final viscosity and setback values. The peak viscosity and setback value ranges from 2278 – 2873 cP and 850 – 1088 cP respectively, the trough and breakdown set point value falls between 1757.5 – 2056 and 476 – 782.5 cP respectively. The panelist preferred cookies made from potassium metabisulphite cocoyam flour (100%), and blanched cocoyam flour (100%). It can therefore be concluded that cookies can be produced from pretreated and untreated cocoyam flour.

Open Access Original Research Article

Determining the Heterotic Group of the Nineteen Open Pollinated Maize Varieties from Their Topcrosses with Inbreed Line Testers in Uganda

Netsanet Abera, Thomas Odong, Lwanga Charles Kasozi

Journal of Scientific Research and Reports, Page 1-7
DOI: 10.9734/JSRR/2018/38177

Knowledge gap on heterotic patterns for yield limits maize breeding program from exploiting genetic potential of open pollinated maize varieties (OPVs) in Uganda. So this study was conducted to determine the heterotic group of the 19 OPVs using the specific combining ability effects of their topcrosses. The toptcrosses were evaluated in 4 Agro-ecologies of Uganda using 5x13 α-lattice design replicated twice per location to test the study hypotheses which was stated as all the 19 OPVs fall under divers heterotic groups. The results of this experiment indicated the presence of low variability for grain yield and thus the possibility of selection among the topcross hybrids that are adapted to the different agro ecologies of Uganda is low. An OPV parent was assigned to group A when its cross with inbred line tester A showed a large negative specific combining ability (SCA) value otherwise it was assigned to opposite heterotic group B. Other parents with lower magnitude of SCA were assigned as heterotic group AB. Based on this criterion, 3 parent OPVs (Longe 4, Longe 5RS and SUWAN) were assigned to the heterotic group A, 2 (SITUKA MI and Ambsyn 5) heterotic group B, and other remaining 14 OPVs were grouped under heterotic group AB. The expressed heterosis between female OPV Ambsyn 5 and SITUKA MI when testcrosses with in bred line tester A (CML536) and Longe 4, Longe 5RS and SUWAN with another tester B (CML202) could be exploited to produce topcrosses and OPV KC2014 as general combiner for yield.

Open Access Original Research Article

Development of Laboratory Hot Compression Mounting Press Machine

Oyetunji Akinlabi, Barnabas Abel Adeiza, Obolo Olupitan Emmanuel

Journal of Scientific Research and Reports, Page 1-12
DOI: 10.9734/JSRR/2018/39372

This research focuses on the design, fabrication and performance evaluation of a laboratory hot mounting press machine for metallography using locally sourced materials and indigenous technology. To achieve this research objective, working drawings were produced which were used to produce the parts of the machine. Mild steel plates were used for the housing and the movable platen while stainless steel and mild steel rods were used for the production of the mold and the sturd respectively. From the design, the temperature of 180°C was used to melt resin by heat supplied from band heater and heating time was 10 minutes. The pressure of 28 MPa was applied by the hydraulic jack for the resin. The need to produce a user friendly and low cost laboratory mounting press machine using indigenous technology and locally sourced materials led to this study and hence, this research is recommended for use in metallurgical sectors, tertiary institutions and research institutes such as The National Agency for Science and Engineering Infrastructure (NASENI), Engineering Materials Development Institute (EMDI), Abuja, and National Board for Technological Incubation (NBTI).