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Institution

Rivers State University of Science and Technology

EducationPort Harcourt, Rivers, Nigeria
About: Rivers State University of Science and Technology is a education organization based out in Port Harcourt, Rivers, Nigeria. It is known for research contribution in the topics: Population & Threatened species. The organization has 1826 authors who have published 1833 publications receiving 15183 citations.


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Journal ArticleDOI
TL;DR: In general, rats given the various forms of the oil seed lost weight, resulting in a negative PER and FCE and there was a consistent improvement in the performance of rats when samples were heat-treated and better improvement when fermented.
Abstract: A study was made of the protein quality of raw, heat processed and fermented African oil bean seed (Pentaclethra macrophylla). Rats given fermented seeds consumed more food than rats given heat-treated seeds which, in turn, consumed more food than rats given the raw seeds. Fermentation and heat treatment improved apparent digestibility, feed conversion efficiency (FCE) and protein efficiency ratio (PER). In general, rats given the various forms of the oil seed lost weight, resulting in a negative PER and FCE. There was, however, a consistent improvement in the performance of rats when samples were heat-treated and better improvement when fermented. The probable reason for the poor performance is discussed.

25 citations

Journal ArticleDOI
TL;DR: African yam beans were fermented to obtain anowoh-type product and a comparison of unfermented seeds with thefermented product showed that there were decreases in the levels of total nitrogen, crude protein, crudefiber and lipids, and that there was increases in thelevels of carbohydrate and total organic matter.
Abstract: African yam beans were fermented to obtain anowoh-type product. Microorganisms associatedwith the fermentation were Bacilluslicheniformis, B. pumilus, B. subtilis and Staphylococcus sp. Total microbial counts increasedfrom 1.53 × 105cfu/g to 1.51 × 109cfu/g under aerobic conditions, and from 8.0 × 103cfu/g to 1.35 × 107 cfu/g under conditions ofreduced oxygen tension. The pH of the substrateincreased throughout the fermentation, from 6.8 to7.5. A comparison of unfermented seeds with thefermented product showed that there were decreases inthe levels of total nitrogen, crude protein, crudefiber and lipids, and that there were increases in thelevels of carbohydrate and total organic matter.Enzyme activities during fermentation revealed thatamylase production was erratic showing a slightincrease during the first 24 h followed by a steeprise in activity in the next 24 h. By contrast, lipaseactivity increased rapidly throughout the first 72 hwhile proteinase activity followed a type of sigmoidcurve with a steady increase in activity within thefirst 48 h and a relatively high activity until the96th h before plunging downwards.

25 citations

Journal ArticleDOI
TL;DR: In the rainy season after flowering, plantain cultivars developed symptoms of black sigatoka more slowly than in the rainySeason before flowering, suggesting a change in the host susceptibility with age.

25 citations

Journal Article
TL;DR: In this article, a study on periphyton of Crinium plants was conducted in the New Calabar River of the Niger Delta at 4 different locations during the two major seasons (rainy and dry season).
Abstract: Studies on periphyton of Crinium plants were conducted in the estuary (New Calabar River) of the Niger Delta at 4 different locations during the two major seasons (rainy and dry season). Periphyton samples were collected from an area (of 2 cm by 2 cm) in 3 sets of 3 replicates for biomasses (AFDW-ash free dry weight and chlorophyll a) and for numerical abundance. Physicochemical parameters such as temperature, pH, conductivity, hardness and salinity were also collected from the respective stations. Temperature was considerably uniform but conductivity, hardness and salinity showed increasing graduation in concentration down stream. A total of 110 periphyton species were recorded with diatoms constituting 54% of the occurring species followed by Euglenophyta (21%), Chlorophyta (17%), Cyanophyceae (6%) and Rhodophyta (1.8%). There were strong similarities in the values obtained for species richness, periphyton abundance, and chlorophyll a, AFDW (ash free dry weight) for wet and dry season indicating no seasonal influence. However, the periphyton abundance, chlorophyll a and ash free dry weight distribution suggested strongly influence by the salinity gradient. The values for periphyton abundance ranged from 2621 (±168.5) to 3452.8 (±715.9) indiv. cm–2. In addition, the combined mean values for chlorophyll a, and ash free dry weight in the system were 8.443 ± 2.51 mg cm–2 and 0.32 ± 0.07 g cm–2, respectively.

25 citations

Journal ArticleDOI
01 Dec 2021
TL;DR: In this article, the use of wheat straw ash (WSA) as a partial replacement of Portland cement in concrete mixtures was evaluated in terms of its compressive strength, modulus of elasticity, split tensile strength and flexural strength.
Abstract: This paper presents the results from the experimental investigation of the use of wheat straw ash (WSA) as a partial replacement of Portland cement in concrete mixtures. The WSA was used to replace PC up to 20% and the corresponding mechanical performance of the concrete mixtures evaluated. The mechanical performance of the concrete mixtures was evaluated in terms of its compressive strength, modulus of elasticity, split tensile strength and flexural strength. The effect of the WSA on the workability of the mixtures was also evaluated by assessing the slump of each mixture. The findings from this research showed that the use of WSA as a 10% replacement of the PC is optimum. Concrete mixtures made with 10% WSA as replacement of PC is 12%, 10% and 11% higher in the compressive strength, split tensile strength and flexural strength, respectively compared to the control. It was also found out that the high surface area and absorption of WSA resulted in a decrease in the slump of the concrete mixtures with increasing WSA content. Nonetheless, it was recommended that future studies on the durability performance of these concrete mixtures to be carried out in order to understand the performance of these mixtures in different environments.

25 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20235
202210
2021203
2020300
2019220
2018108