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Search Results: 1 - 10 of 9826 matches for " Patrick Amoatey "
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Options for Greenhouse Gas Mitigation Strategies for Road Transportation in Oman  [PDF]
Patrick Amoatey, Hameed Sulaiman
American Journal of Climate Change (AJCC) , 2017, DOI: 10.4236/ajcc.2017.62011
Abstract: Oman is a fast developing country where about 76% of registered vehicles as of 2014 were private cars with approximately one private car per household. The growth of automobile is faster than the growth of human population. From 2000-2009, Omani population has increased by 2% per annum while automobile usage in the country has increased by 4.3%. The leadership of Sultanate of Oman has pledged to cut down greenhouse (GHG) emissions by 2% as a commitment to United Nation Framework Convention on Climate Change (UNFCCC). Due to very limited public transportation system, traffic congestion and emission from vehicles are high during working days since majority of individuals uses private vehicles as only means of transport. This paper seeks to combine mitigation measures adopted in selected Middle East and North Africa (MENA) and UNFCCC to suggest cost-effective measures suitable in reducing GHG emissions from road transportation sector in Oman. These measures will specifically reduce vehicular emissions during working days where car occupancy rates are very low in an economically sustainable way.
Shifting to Renewable Energy to Mitigate Carbon Emissions: Initiatives by the States of Gulf Cooperation Council  [PDF]
Hilal Al Shidi, Hameed Sulaiman, Patrick Amoatey
Low Carbon Economy (LCE) , 2016, DOI: 10.4236/lce.2016.73012
Abstract: The Gulf Cooperation Council (GCC) countries approximately have 40% of world’s proven oil reserves and 21.7% of world’s known gas reserves. Low energy costs compiled with low taxation make it lucrative to foreign energy-intensive companies to operate in the region. Energy consumption in GCC has increased by 74% in the period between 2000 and 2010 and it is projected to increase by approximately 10% to 15% between 2010 and 2020. Embracing the general commitment by GCC states to reduce greenhouse gas emission (GHG) of United Nation Framework Convention on Climate Change (UNFCCC) has started the process of environmental awakening in the GCC countries due to its high vulnerability to the effects of climate change. This paper reviews the trends in shift to renewable energy with reference to GCC and also the co-benefits of investing in renewable energy. Solar plant and Building-Integrated Photo-Voltaic (BIPV) systems are the most invested projects. However in the long run, policies and strategies are needed to ensure the successful and larger implementation of mitigation objectives.
Agronomic, Water Productivity and Economic Analysis of Irrigated Rice under Different Nitrogen and Water Management Methods  [PDF]
Abdulai Yakubu, Joseph Ofori, Christiana Amoatey, Davie M. Kadyampakeni
Agricultural Sciences (AS) , 2019, DOI: 10.4236/as.2019.101008
Abstract: The most limiting factors for irrigated rice farming are water and nitrogen. Efficient water and nitrogen management has remained critical for sustainable rice production in irrigated rice farming system. Due to rapid global population growth and climate change, future rice production will depend heavily on developing strategies and practices that use water and nitrogen efficiently. The study therefore set to evaluate agronomic, water productivity and economic analysis of irrigated rice under various nitrogen and water management methods. To achieve the set objectives, field and pot experiments were carried out at the Soil and Irrigation Research Centre, University of Ghana, Kpong in 2015 and 2016 cropping season. The field experiment was laid in a split plot design with water management treatments as main plots and N fertilizer as subplot treatment. The pot experiment was carried out in a randomized complete block design with five replications. The water management treatments were; continuous submergence (SC), alternate wet and dry soil condition (AWD) and moist soil condition (MC). Nitrogen fertilizer rates were; no N fertilizer (N0), 60 kg N/ha (N1) and 90 kg N/ha (N2). Data such as yield and yield parameters of rice, water use, water productivity, costs and returns were recorded. Results obtained from both pot and field experiments revealed that rice yields were at par in AWD and SC but yields were lower in MC treatment. With N fertilizer, higher yields were observed with 90 kg N/ha. The interaction effect of submerged with 90 kg N/ha gave the highest grain yield. N fertilizer effect on water use and water productivity was ranked as N2 > N1 > N0 while water management effect on water use and water productivity was ranked in this order: SC > AWD > MC and MC > AWD > SC respectively.
Water use efficiencies of maize cultivars grown under rain-fed conditions  [PDF]
Daniel Kwasi Asare, Justice Okona Frimpong, Emmanuel Ofori Ayeh, Harry Mensah Amoatey
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.22018
Abstract: Enhancing water use efficiencies of rain-fed maize is a requirement for sustainable maize production, particularly in areas prone to low/drought and erratic rainfall patterns. This study was conducted to assess the relationship between total biomass/grain yield and water use efficiencies of three maize cultivars (Golden Crystal, Mamaba and Obatanpa) grown under rain-fed conditions in a coastal savannah agro-ecological environment of Ghana. Results of the study showed that a unified linear model, WUETDM = 0.03TDM with R2 = 0.765 and P ≤ 0.001, described adequately the relation between wa-ter use efficiency and total biomass (dry matter), which is applicable for the three maize cultivars for both the major and minor cropping seasons. A linear model could only, however, describe adequately well the relation between WUEGY and GY for the major (WUEGY = 0.001GY – 0.67; R2 = 0.996; P ≤ 0.001) and minor (WUEGY = 0.002GY + 0.289; R2 = 0.992; P ≤ 0.001) cropping seasons for all the maize cultivars. The linear models developed for the maize cultivars, re-lating WUEGY to GY, are specific to each of the crop growing seasons, indicating that seasonal rainfall impacts significantly on harvest index of the maize cultivars but differently in each of the crop growing seasons as a results of dif-ferences in seasonal rainfall. However, the models could be used to estimate water use efficiencies of each of the three maize cultivars given the appropriate TDM and GY as inputs for the environment under which the study was conducted.
Field Assessment of Soil Water Storage and Actual Evapotranspiration of Rainfed Maize (Zea mays L.) Genotypes in a Coastal Savannah Environment  [PDF]
Justice Okona Frimpong, Marcus Quaynor Addy, Emmanuel Ofori Ayeh, Harry Mensah Amoatey, Jacob Teye Kutufam, Bertrand Quaye, Joshua Osei Sintim, Daniel Kwasi Asare
Open Journal of Soil Science (OJSS) , 2012, DOI: 10.4236/ojss.2012.23026
Abstract: A field experiment was carried out in a coastal savannah agro-ecological zone of Ghana to assess the dynamics of stored soil water and actual evapotranspiration (AET) of three maize genotypes (Obatanpa, Mamaba, and Golden Crystal) grown under rainfed conditions. Access tubes were installed to a depth of 120 cm for soil water content monitoring using a neutron probe meter. The soil water balance model of plant root zone was used to estimate AET at different crop growth stages. On average, the rate of AET for Obatanpa, Mamaba, and Golden Crystal maize genotypes were estimated as 4.32, 4.46, and 3.72 mm·day–1, respectively, for the major cropping season as against corresponding values of 3.88, 4.00 and 3.72 mm day–1 for the minor cropping season. Mamaba had higher values of AET from 42 DAE (days after emergence) to 84 DAE during the minor cropping season while it had low AET values during the major cropping season. The positive balance in stored soil water in the root zone of Obatanpa was the highest from 42 DAE to 84 DAE followed by Mamaba and Golden Crystal during the major cropping season. Mamaba, on the other hand, had the highest AET from 70 DAE to 84 DAE. Obatanpa used 55.6% of stored soil water for AET, which was the highest among the maize genotypes during the major cropping season. Golden Crystal and Mamaba followed with 53.3% and 51.5%. For the minor cropping season, 48.5% of stored soil water was used by Mamaba for AET, followed by Obatanpa, (46.4%) and Golden Crystal (43.2%). A strong positive significant (p ≤ 0.05) linear correlation existed between AET and precipitation with the coefficient of determination (R2) being 69.2 for Obatanpa, 88.5 for Mamaba and 82.8 for Golden Crystal for the major cropping season. Higher R2 values (98.0, for Obatanpa, 94.1 for Mamaba and 98.9 for Golden Crystal) were, however, obtained for the minor cropping season. Additionally, a strong linear relationship was found between AET and precipitation, suggesting the need to formulate strategies for enhancing effective use of precipitation in sustained rainfed maize production.
Induced Mutations for Improved Lycopene, Total Antioxidant Properties and Other Quality Factors in Wild Tomato (Solanum pimpinellifolium L)
Emmanuel K. Quartey,Harry M. Amoatey,Daniel G. Achel,George Y. P. Klu
Advance Journal of Food Science and Technology , 2012,
Abstract: The objective of the study was to determine biochemical changes in (5) gamma radiation induced variant lines of wild tomato after mutation induction. Five gamma radiation-induced variant lines of wild tomato (Solanum pimpinellifolium L.), selected in the M3 generation following mutagenic treatment of seeds using three doses (150, 300 and 450 Gy, respectively) of gamma radiation from a Co-60 gamma source, were analysed for their lycopene content, total antioxidant properties, total and soluble solids as well as pH. Fruits of variant line BV-21 (deep red fruits) recorded higher lycopene contents of 146.1 mg/kg on fresh weight basis and 156.7 mg/kg on dry weight basis compared to 136 and 152 mg/kg, respectively for the control. They also recorded higher total antioxidant properties compared to the control. Fruits of variant line BV-40 (yellow fruits) recorded higher total solids of 17.9% and the lowest pH value of 4.17 compared to 12.8% and 4.36 for fruits from unirradiated plants. The highest amounts of total soluble solids (7%) were contained in fruits harvested from variant lines BV-27 (light red fruits) and BV-23 (deep red fruits) as against 5.6% for fruits from control plants. The study indicates that wild tomato has immense nutritional properties which can be further improved through mutation breeding.
Crossability Studies in Cassava in the Coastal Savanna Zone of Ghana
W. Nunekpeku,H.M. Amoatey,V. Oduro,G.Y.P. Klu
Asian Journal of Agricultural Sciences , 2012,
Abstract: Nine cassava (Manihot esculenta Crantz) accessions were artificially crossed in a pair-wise fashion, in the coastal savanna agro-ecological zone in Ghana, to determine level of crossability and seed set as a guide to future breeding programmer. Crossability among the accessions ranged from 0% (in AN x HO-008, LA x HO-008 and AF x ME crosses) to 88% (in AS x AF crosses). For any pair of parents used, reciprocal crosses exhibited significant (p≤0.05) differences in percent crossability. Seed set and embryo formation among crosses varied from 0 to 100% and 40 to 100% respectively. High crossability did not necessarily translate into high seed set or embryo formation as no direct relationship could be established between these variables. Variations in crossability among the accessions are attributed to inherent genetic differences among the accessions and the effect of reciprocal crosses.
In vitro Regeneration of Ricinus communis L. and Jatropha curcas L. for Biofuel Production
K.E. Danso,N.T. Afful,C. Annor,H.M. Amoatey
Biotechnology , 2011,
Abstract: The growing of oil producing tree crops for biodiesel on large scale to supplement fossil fuel has become lucrative agribusiness for farmers due to high cost of crude oil. In spite of their high economic value and comparative advantage over food crops as energy sources, oil producing tree crops have low seed viability making large scale commercial propagation difficult. Thus alternative mode of propagation via in vitro culture is highly recommended. In this study, attempts were made to regenerate Ricinus communis and Jatropha curcas, oil producing tree crops belonging to the family Euphorbiaceae. The addition of cytokinin (BAP, kinetin or 2iP) in the culture medium significantly increased the viability of zygotic embryos of Ricinus over the controls depending on the stage at which the fruits were collected but conversely in Jatropha the increase was not significantly different. Of the three cytokinins used 2iP enhanced the highest shoot regeneration with the optimal concentration ranging from 0.5 mg L-1 in Ricinus and 1.5 or 2.0 mg L-1 in Jatropha, indicating genotypic difference between the species. However, excessive callus formation and browning in Ricinus led to the loss of regenerants. Plant growth regulators also influenced regeneration from meristem explant with 2iP again being the best. The successful regeneration of plantlets from shoot tip explants of Ricinus and Jatropha augurs well for future genetic transformation of the crop for biofuel production.
Elemental Composition in Fruits of Gamma-Radiation Induced Variant Lines of Solanum pimpinellifolium L
Emmanuel K. Quartey,Nicholas S. Opata,Harry M. Amoatey,George Y.P. Klu
Asian Journal of Agricultural Sciences , 2012,
Abstract: The aim of the study was to determine the nutritional (elemental) potential of fruits of five mutationinduced variant lines of S. pimpinellifolium compared to the parental lines.Wild tomato (Solanum pimpinellifolium L.), has immense nutritional potential which could be tapped for the benefit of man. Fruits of gamma-radiation induced variants lines of wild tomato were analyzed for content of some essential elements using Instrumental Neutron Activation Analysis (INAA). The method used detected the presence of Na, K, Ca, Mg, Cu, Mn and V in varying concentrations in the pericarp and also in the pulp and seeds of five variant lines as well as the parent line of wild tomato (Solanum pimpinellifolium L.). Analysis of the results shows that the concentrations of these elements in the pericarp as well as pulp and seeds of variant lines differed significantly from the parental line. The accuracy of the method was verified by analysis of a compositionally appropriate reference material, IAEA-359 (Tomato leaves).
Ego Depletion and the Humean Theory of Motivation  [PDF]
Patrick Fleming
Open Journal of Philosophy (OJPP) , 2014, DOI: 10.4236/ojpp.2014.43042
Abstract:

By what capacities do human beings engage in intentional action? Humeans about motivation claim that the source of all action is desire. Volitionalists claim that action has two distinct sources, one in the will and one in desire. Recent work suggests that volitionalism has some empirical support. Roy F. Baumeister and colleagues have argued for a phenomenon called “ego depletion”. They argue that some aspect of the self exerts volition in a number of different contexts. The main evidence for this claim is that experimental subjects who engage in acts of self-regulation are less likely to engage in similar actions on later tests. The evidence calls for a reformulation of the Humean theory, not a rejection of it. And the reformulation is one that still has interest for metaethics. Many philosophers are interested in the Humean theory of motivation because they believe that it has implications for the correct theory of normative practical reasons. Here I argue that if the Humean theory of motivation was ever a threat to the objectivity of morality, it still is.

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