Variety and phosphate fertilizer dose effect on nutrient composition, in vitro digestibility and feeding value of cowpea haulm

Ansah, Terry,Algma, Henry Ayindoh,Dei, Herbert Kwabla Korean Society of Animal Sciences and Technology 2016 한국축산학회지 Vol.58 No.6

Background: Cowpea (Vigna unguiculata [L.]) is a legume cultivated throughout most tropical countries and is valued as food and feed for human and livestock respectively. The search for an improved cowpea variety has been on-going with the aim of improving traits such as grain yield, drought and pest resistance. But no information exist on the feeding value of these improved varieties. Phosphate (P) fertilizer application is recommended to augment grain yield in grain legumes but data on the effect of P fertilizer on haulm quality is limited. Results: Two separate experiments were conducted to determine the effect of P fertilizer dose on the nutritive value of haulms from different cowpea varieties (V). In experiment 1, effect of three P doses (30, 60 and 90 kg $P_2O_5/ha$) on in vitro gas production (IVGP) characteristics, concentrations of digestible organic matter (DOM), crude protein (CP), acid detergent fiber (ADF) and neutral detergent fiber (NDF) of haulms from five cowpea varieties (Zaayura-SARC 4-75, Songotra-IT97K-499-35, Hewale-IT93K-192-4, IT99K 573-1-1 and Asomdwe-IT94K-410-2) were investigated using the $3(P){\times}5(V)$ factorial treatment arrangements in a completely randomized design. In experiment 2, the effects of two P doses (30 and 90 kg $P_2O_5/ha$) and two varieties (Zaayura-SARC 4-75 and Hewale-IT93K-192-4) on the voluntary feed intake, live weight, haematology and carcass characteristics of Djallonke lambs were also assessed using a $2(P){\times}2(V)$ factorial treatment arrangement. The $V{\times}P$ interaction significantly affected CP, NDF and ADF with CP concentration increasing with increase in P doses in Zaayura-SARC 4-75 and Asomdwe-IT94K-410-2. Whilst an increase (P < 0.05) in NDF was observed in Songotra-IT97K-499-35and Asomdwe-IT94K-410-2 as P doses increased, the other V only increased from P dose 30 to 60 kg/ha and declined at P dose 90 kg/ha. The ADF decreased (P < 0.05) with increase in P dose for all V with the exception of Songotra-IT97K-499-35. There was a significant V effect on DOM with the highest reported in Zaayura-SARC 4-75 (43.44 %). Daily DM intake, carcass length and blood urea nitrogen of the lambs were significantly affected by the V x P interaction. There was a significant V effect on globulin and P effect on live weight at slaughter, dressed weight, chuck, leg, loin, rib and flank and liver and lungs. Conclusion: It can be concluded that nutrient concentrations of cowpea haulms were positively influenced by different P dose and varieties with favorable effects on growth, haematology and carcass composition of lambs. Varieties Zaayura-SARC 4-75 and Hewale-IT93K-192-4 at P dose at 90 kg/ha are recommended to enhance growth performance and carcass yield of Djallonke lambs.

가나의 농촌지도사업과 국제협력사업의 현재와 미래

안사아이삭 ( Ansah Isaaca ),조경래 ( Gyoung Rae Cho ) 한국농촌지도학회 2014 농촌지도와 개발 Vol.21 No.2

이 연구의 목적은 가나의 농촌지도사업과 농업기술의 국제협력시스템의 현황과 방향을 탐색하는 것이다. 향후 농촌지도사업의 역할은 지금까지 해 오던 것과는 매우 다를 것이다. 농업기술시스템의 촉진자로서의 농촌지도의 역할은 민간부분의 증가와 함께 증가될 것이다. 공공 농촌지도사업은 민간 부분에서는 농민들의 다양한 요구에 부응할 수 없기 때문에 계속적으로 그 중요성이 증가할 것이다. 향후 이러한 변화와 함께, 가나의 농촌지도시스템에서 내적인 개혁은 도전에직면하게 될 것이다. 국제협력시스템은 외부의 이해당사자와 농촌지도사업의 파트너십을 형성하는데 중요한 역할을 할 것이다. 종자산업으로부터 나타난 혁신은 역동적이고 시스템적인 과정이었다. KAFECI는 그러한 변화가 2-3년안에 일어난다면 이러한 변화를 유연하게 받아들여야 한다. 기술이전과 전파의 도구나 틀은 다양한 사회경제적인 배경속에서 공동의 목적을 향해 도전하는 혁신적인 플렛폼으로서 발전되어져야 한다. The purpose of this study is to explore the present and future agriculturalextension system and international cooperation systems for agriculturaltechnologies in Ghana. The role of agricultural extension in the next decadeshould be quite different from what it was 10 years ago or even now. Its roleas a facilitator of agricultural knowledge system would only increase as moreparticipants from private sector would get involved in extension. The publicsector extension would still continue to be the major extension provider inmost parts of the country as the private sector alone would not be able to meet even partially the varied needs of farmers. Internal reforms are thusgoing to be the greatest challenge for the Ghana Extension System. The cooperation systems work in partnership with other stakeholder toprovide agricultural extension and advisory services to farmers. Innovations(information/knowledge) emerging from the seed industry may be seen asdynamic and systemic process which can emerge from many sources. KAFECI’s interventions must be flexible to accommodate such changes if theneed arises in subsequent years (year 2 & 3). The framework and tools fortechnology transfer and dissemination is developed on “innovation platform”where a group of stakeholders/collaborators with diverse social and economicbackgrounds, work towards a common objective or challenge.

A comprehensive parametric study for solid-state lithium-ion battery through finite element simulation

Solomon Ansah,Namsoo Shin,Jong-Sook Lee,Hoon-Hwe Cho 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.6

Solid-state lithium-ion batteries (SSB) have been regarded over recent years as a promising candidate for next-generationenergy storage due to their increased energy density and safety compared to conventional lithium-ion batteries. However,some internal and design parameter eff ects are yet to be fully comprehended. Since numerical modeling gives the opportunityto explore easily the various parameters and their eff ect on the performance of the cell, herein, we present a numericalmodel to study some parameters to optimize the performance of the SSB. The model considers diff usion of lithium-ion inboth the electrode and electrolyte and electrochemical reactions within the SSB. The model prediction agrees with someexperimental discharge profi les, which therefore validates the model. The model is then used to understand the role of theelectrode and electrolyte thickness and maximum concentration of lithium in the solid phase on the performance of thecell. It was observed that increasing cathode thickness increases the cell capacity, whereas reducing electrolyte thicknessimproves the capacity of the cell. Moreover, a direct proportionality is established between the maximum concentration oflithium and the call capacity. Additionally, the role of transport parameter, diff usivity, on the capacity of the SSB at diff erentdischarging rates is also studied. The understanding garnered from the study will improve the cell electrode design tailoredto the desired applications of the SSB.

Effect of fines dissolution on the particle size of ammonium sulfate by evaporation crystallization in semi-batch mode

( Owusu Ernest Ansah ),김광주 한국공업화학회 2013 한국공업화학회 연구논문 초록집 Vol.2013 No.1

Superhydrophobic and Superoleophilic Cu Meshes possessing Filter and Catalysis Functions for Oil/Water Separation and Pollutant Purification

Stephen Boakye Ansah,이하진,최원산 한국고분자학회 2015 한국고분자학회 학술대회 연구논문 초록집 Vol.2015 No.4

The Use of Social Media among First-Year Student Groups: A Uses and Gratifications Perspective

Christopher M. Owusu-Ansah,Beatrice Arthur,Franklina Adjoa Yebowaah,Kwabena Amoako 건국대학교 GLOCAL(글로컬)캠퍼스 지식콘텐츠연구소 2021 International Journal of Knowledge Content Develop Vol.11 No.4

The purpose of the study was to explore the uses and gratification of social media among first-year student groups at a satellite campus of a public university in Ghana. The study employed a descriptive survey design. The study involved all 1061 first-year university students in six academic departments of the College. A total of 680 (64%) participants returned validly completed copies of the questionnaire. Descriptive statistics and thematic analysis were employed for data analysis. The findings indicate that WhatsApp was the most popular application for social media groups, while a need for information-sharing, peer-tutoring and learning, and finding and keeping friends were the primary motivations for joining social media groups. First-year students are involved mainly in reactive activities, as most engage when solving an academic assignment through group discussions. Though challenges persist, such as posting of unwanted images, inadequate participation, and ineffective and irrelevant communication, most are willing to continue their social media groups' membership in the long term. This study provides valuable insight into transitioning students' lived experiences on social media from the group perspective. These insights are valuable conceptually and practically to academic counsellors, librarians and student affairs officers who are expected to provide on-going education on (social) media literacy to first-year students to enhance the adjustment process. The study is the first of its kind in Ghana that investigates social media group participants' exit intentions.

Heavy metals concentration and human health risk assessment in seven commercial fish species from Asafo Market, Ghana

Edward Ebow Kwaansa-Ansah,Samuel Owusu Nti,Francis Opoku 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.2

Health risk assessment and heavy metal accumulationwere evaluated in the muscles of widely consumedTrachurus trachurus, Lutjanus fulgens, Lutjanusgoreensis, Acanthocybium solandri, Pagellus bellottii,Scomber colias and Dentex congoensis fish species inAsafo, Ghana. The fish samples were prepared using a wetdigestion method and the heavy metals analysis was performedwith the flame atomic absorption spectrophotometer(UNICAM 969). The results revealed that Mn, Cu, Zn,Cd, and Pb concentrations were below the permissiblevalues set by several health institutions. The health riskassessment based on non-carcinogenic and cancer factorseffect indicates no adverse health effect of fish intake. Theresults of heavy metal concentrations showed that differentvarieties of fish could be safe for human intake and theresults are anticipated to create alertness among the localpeople.

Governance Perspectives of Human Security in Africa

( Kwesi Aning ),( Ernest Ansah Lartey ) 서울대학교 통일평화연구원 2019 Asian Journal of Peacebuilding Vol.7 No.2

Human security should not be considered as a mere academic rhetoric―it is, in fact, a political tool aimed at transforming individuals from conditions of exploitation and domination to that of political participation and accountability. This paper adopts political governance perspectives to analyze human security in Africa. It argues that without accountable democratic governance, the expressed objectives of human security would be difficult to achieve in Africa. By this focus, the paper adopts a broader view of human security, satisfying both the governance and development prerequisites of the concept, which has underpinned [in] security in Africa. The overall estimation of human security in Africa is that only a marginal improvement has been made in the region, especially over the last decade.

A comprehensive analysis on the microstructure, mechanical and electrochemical properties of a friction stir processed CrMnFeCoNi high entropy alloy

S. Y. Anaman,S. Ansah,M. G. Jo(조민구),J. Y. Suh(서진유),H. N. Han(한흥남),M. J. Kang(강민정),J. S. Lee(이종숙),S. T. Hong(홍성태),H. H. Cho(조훈휘) 한국소성가공학회 2021 한국소성가공학회 학술대회 논문집 Vol.2021 No.5

The electrochemical properties of a friction stir processed (FSPed) equiatomic CrMnFeCoNi high-entropy alloy (HEA) is investigated in an aerated 0.5 M Na₂SO₄ electrolyte solution at room temperature. The microstructural analysis reveals a highly refined stir zone (SZ) with an average grain size that decreases from the top region of the SZ to the bottom region of the SZ (also known as shear processed zone; SPZ). However, the region below the SPZ, (i.e., below the plunge depth) experienced an increase in average grain size and dislocation densities compared to the other regions. There is no secondary phase observed in the FSPed region, however, the microstructural evolution in the FSPed region affects the electrochemical behavior of the HEA. Cr₂O₃ passive layer is observed to form on the FSPed HEA leading to excellent corrosion properties from the polarization corrosion tests. Grain refinement in the SZ enhances the rapid formation of the passive layer, thus, leading to better corrosion properties in the front surface of the FSPed HEA. The localized corrosion behavior of the FSPed HEA is predicted to be caused by the micro-galvanic nature of the HEA, which leads to an increase in polarization at the anodic sites (pits). A numerical model is established using the corrosion parameters from the experiment to simulate the localized corrosion behavior on the surface of the FSPed HEA in a neutral environment. The predicted initial pitting potential and corresponding current density agree well with the experimental results. The model is also capable of tracking the dissolution of the pits over longer periods.

Evaluating the Information Access Skills of Students of a College of Education in Ghana

Yebowaah, Franklina Adjoa,Owusu-Ansah, Christopher M. Korea Institute of Science and Technology Informat 2020 Journal of Information Science Theory and Practice Vol.8 No.2

Access to relevant information determines the quality of life of an individual in society and the academe. Academic institutions have established information literacy programmes to enhance students' access to information. With the elevation of colleges of education to tertiary status in Ghana, pre-service teachers are now required to conduct research to improve their reflective thinking in order to be certified. However, the information access skills of students in colleges of education in Ghana are uncertain. This study draws empirical evidence from students in the Nusrat Jahan Ahmadiyya College of Education, Wa, Ghana on their information access skills. Primary data were collected from 303 respondents from the college using a stratified sampling procedure. The data were collected using a questionnaire and analysed using descriptive statistics. The results indicate that information is available to students through different sources such as the Internet, libraries, and contact with friends and authorities. However, students were limited in respect to access to relevant online resources for their academic activities due to inadequate information access skills. Potential solutions are discussed.