Communities in DSpace

Select a community to browse its collections.

Recent Submissions

Thumbnail Image
Item
Effect of packaging materials and storage conditions on the physicochemical and chemical properties of ogi powder
(WFL, 2013-10-30) Awoyale Wasiu, Maziya-Dixon Busie, Menkir Abebe,
The effects of packages, storage conditions and the length of storage on the physicochemical and chemical properties of ogi powder produced fromyellow maize grain were investigated. Ogi was produced using the traditional method, dried at 55°C to a powder in a cabinet drier, milled, cooled andpacked in high-density polyethylene bag (HDPE), a polypropylene woven sack (PP), and a polyvinyl chloride container (PVC). The samples werestored under different conditions for 12 weeks and sampled at three-week intervals for analysis. Significant differences were observed for all thephysicochemical and chemical properties of the ogi powder investigated except for the water absorption capacity and the ash content. At the end ofthe storage period, PVC-packed ogi powder stored in the dark compartment of the storage box had the highest degree of yellowness (2632.33) andHDPE bag-packed ogi powder stored in the lighted compartment had the least one(2424.33). Ogi powder packed in PVC stored in the darkcompartment had the highest final viscosity (193 RVU) and that packed in PP woven sack stored in the dark compartment had the lowest one(185RVU). Ogi powder packed in PP woven sack stored in the lighted compartment had the highest setback (89 RVU) while that packed in PP woven sackand stored in the dark compartment had the lowest one (82 RVU). The overall mean of the sugar content at the end of the 12 weeks of storage was1.14%; PP woven sack (2%) and PVC (0.59%) packed ogi powder stored in the lighted compartment of the storage box had the highest and lowestvalue, respectively. The overall mean of the starch content at the end of the 12 weeks storage period was 53.81%; ogi powder packed in PP woven sackand stored in the lighted compartment had the highest (66.1%) and ogi powder packed in PP woven sack stored in the dark compartment had the least(42.86%) value. After 12-weeks of storage, moisture content increased from 5.5% before storage to 10.23% in ogi powder packed in PP woven sacks andstored in the dark compartment. Therefore, HDPE bag could be used to store ogi powder at a temperature of 26.10-27.90°C and relative humidity rangeof 63-75% and ogi powder packed in PVC can be stored at a temperature and relative humidity range of 27.20-30°C and 58-66%, respectively, for goodproduct quality.
Thumbnail Image
Item
Awoyale Wasiu, Maziya-Dixon Busie, Sanni Lateef , Shittu Taofik Akinyemi
(WFL, 2010-11-04)
The effect of distiller’s spent grain supplementation on the nutritional and sensory properties of amala, a popular traditional thick paste of yam (Dioscorea alata or D. rotundata) consumed with preferred soup, was investigated. Pre-treated distiller’s spent grain was used to replace 5%, 10%, 15%, 20%, 25%, 30% and 35% of yam flour as a protein and dietary fibre supplement. Processing of the flour blends to amala significantly (p≤0.05) increased its fat, total sugar, starch and total content of dispensable and indispensable amino acids while the ash content was slightly reduced. Addition of distiller’s spent grain to the flour blends quantitatively and qualitatively increased the protein content of the amala products. Quantitatively, the protein content increased from 6.86% for 100% yam to 14.69% for 65% yam:35% distiller’s spent grain, with a mean of 10.77%. Qualitatively, the tryptophan content increased from 0.08 g/100 g sample for 90% yam:10% distiller’s spent grain to 0.14 g/100 g sample for 65% yam:35% distiller’s spent grain. The methionine content increased from 0.09 g/100 g sample for 95% yam:5% distiller’s spent grain to 0.25 g/100 g sample for 65% yam: 35% distiller’s spent grain. The insoluble dietary fibre content of the amala products increased while the soluble dietary fibre content was reduced as distiller’s spent grain increased in the blends. The mean insoluble dietary fibre content of the amala products was 9.17% with a range from 7.56% (100% yam) to 11.54% (65% yam:35% distiller’s spent grain). The mean soluble dietary fibre content was 0.75% with a range from 0.62% (65% yam:35% distiller’s spent grain) to 0.85% (100% yam). However, sensory evaluation indicated that amala from 5%, 10% and 15% distiller’s spent grain substitution levels was well accepted and compared favourably with that of whole yam flour.
Thumbnail Image
Item
Product Quality Influence on Corporate Reputation:
(UNIZIK Journal of Marketing (UJofM), 2024-10-04) Adebayo Adeyemi Abdulwasiu
In today’s retail business, the quality of a product can significantly impact a company's corporate reputation, as customers often associate product quality with the overall reputation of retail firms. This study examines the influence of product quality on corporate reputation, with evidence from retail firms in Nigeria. A quantitative research design was employed, focusing on customers of selected retail companies in Lagos State, namely Shoprite, Buyrite, and Spar. A survey method using questionnaires was utilized to collect primary data. The sample size was determined to be 246, and multistage sampling techniques were employed. Of the 246 distributed questionnaires, 150 were retrieved and coded for analysis. Standard multiple regression was used to analyze the data. The results indicate that product quality significantly influences corporate reputation in store-based retail outlets in Lagos State. The study concludes that well-designed quality products that satisfy customer needs, serve their intended purpose, and meet industry standards effectively build trust and sustain corporate reputation. It recommends that retail service providers establish a sustainable corporate reputation through high-quality products to enhance customer confidence and trust. The underlying premise is that higher perceived product quality leads to increased customer patronage.
Thumbnail Image
Item
Comparative Study of 2011 and 2015 Presidential Elections in Nigeria
(IOSR Journal Of Humanities And Social Science (IOSR-JHSS), 2015-12) Araba, Akeem Ayanda and Odunayo Joseph Braimah
Presidential, Election, Political Parties, Parliament
Thumbnail Image
Item
Genome of the African cassava whitefly Bemisia tabaci and distribution and genetic diversity of cassava-colonizing whiteflies in Africa.
(2019-05-15) Chen, W., Wosula, E. N., Hasegawa, D. K., Casinga, C., Shirima, R. R., Fiaboe, K. K. M., Hanna, R., Fosto, A., Goergen, G., Tamò, M., Mahuku, G., Murithi, H. M., Tripathi, L., Mware, B., Kumar, L. P., Ntawuruhunga, P., Moyo, C., Yomeni, M., Boahen, S., Edet, M., Awoyale, W., Wintermantel, W. M., Ling, K., Legg, J. P., and Zhangjun Fei, Z.
The whitefy Bemisia tabaci, a species complex consisting of many morphologically indistinguishable species divided into distinct clades, is one of the most globally important agricultural pests and plant virus vectors. Cassava-colonizing B. tabaci transmits viruses that cause cassava mosaic disease (CMD) and cassava brown streak disease (CBSD). Half of all cassava plants in Africa are affected by these viral diseases, resulting in annual production losses of more than US$ 1 billion. Here we report the draft genome of the cassava whitefly B. tabaci Sub-Saharan Africa- East and Central Africa (SSA-ECA), the super-abundant population that has been associated with the rapid spread of viruses causing the pandemics of CMD and CBSD. The SSA-ECA genome assembled from Illumina short reads has a total size of 513.7Mb and a scaffold N50 length of 497kb, and contains 15,084 predicted protein-coding genes. Phylogenetic analysis suggests that SSA-ECA diverged from MEAM1 around 5.26 million years ago. A comprehensive genetic analysis of cassava-colonizing B. tabaci in Africa was also conducted, in which a total of 243 whitefly specimens were collected from 18 countries representing all major cassava growing regions in the continent and genotyped using NextRAD sequencing. Population genomic analyses confirmed the existence of six major populations linked by gene flow and inferred the distribution patterns of these populations across the African continent. The genome of SSA-ECA and the genetic findings provide va luable resources and guidance to facilitate whitefly research and the development of strategies to control cassava viral diseases spread by whiteflies.