oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 292 )

2018 ( 375 )

2017 ( 365 )

2016 ( 574 )

Custom range...

Search Results: 1 - 10 of 213228 matches for " U.N Ureigho "
All listed articles are free for downloading (OA Articles)
Page 1 /213228
Display every page Item
Nutrient Values of Chrysophyllum Albidum Linn African Star Apple as a Domestic Income Plantation Species
U.N Ureigho, B.A Ekeke
African Research Review , 2010,
Abstract: This study analyzed the nutritive composition of Chrysophyllum albidum Linn. It was necessitated by the need towards creating awareness that this species can provide nutrient supplements for the larger percentage of the population in the rural and peri-urban communities. Chrysophyllum albidum locally called “Udara” is one of the 80 species of Chrysophyllum Linn, a pan-tropical genus. Market Survey was done to collect data from three major markets in Rivers State known for assorted fruits business. Eight to ten of morphologically differing types were characterized and further identified into types. Nine fruit types were morphologically identified and comprehensively analyzed in Food Science and Technology Laboratory, Rivers State University of Science and Technology for nutrient content. The analysis has shown that Chrysophyllum albidum has an approximation of carbohydrate (11%), crude fibre (4%), Lipids (3%), protein (7%), Calcium (17.11ppm), Iron (< Ippm), phosphorus (9.92ppm), vitamin C (25.03ppb), A (10.74ppb), B1 and B2 (< 1ppb). It is recommended that the awareness of the nutritive value of this species be created so as to increase it’s consumption as food supplement to the larger population and expand its utilization.
The Effect of Soil Amendment on the Performance of Gambaya albida (Linn) Seedlings
K. Okunomo,U.N. Ureigho,H.O. Opute
Agricultural Journal , 2013,
Abstract: A study on the effect of soil amendments on the performance of G. albida was conducted at the teaching and research farm of Delta State University, Asaba Campus. A Randomized Complete Block Design (RCBD) with three replicates was employed to assess the effect of these soil amendment options namely cowdung, poultry droppings, Ash and topsoil on growth performance in seedlings of Gambaya albida (Linn). Results showed that there was significant difference between the treatments (p<0.05) from 2-12 Weeks After Transplanting (WAT). As regards the plant height and collar difference between the treatments from the 2-12 WAT. The result indicated that the soil amendment materials had significant effect on leaf number and leaf area of the species (p<0.05) throughout the duration of the study except at 4WAT. The highest mean height valuesof17.17cm was recorded under poultry dropping treatment at 12WAT, while mean leaf number and leaf area values were 8.7 and 55.22 cm2, respectively. The highest leaf dry weight of 1.7 g was obtained undercowdung treatment while poultry dropping sand ash had the highest stem and root dry weights of 1.9and 1.6 g, respectively. It is recommended that poultry droppings should be adopted by our local farmers for the establishment of Gambaya albida seedling.
Nutrient Composition of Palm Oil from Different Varieties of Oil Palm and Health
Ekwenye U.N.
Journal of Food Technology , 2013,
Abstract: Palm oil from different varieties of oil palm were examined for their nutrient composition. Palm oil as found to be rich nutritionally. Palm oil from dura variety was richer in unsaturated fatty acids and carotene as vitamin A than tenera variety.The dura variety also had higher iodine values in both loacations.Thus,palm oil from dura variety can prevent some diseases associated with one deficiency or the other as discussed in the study. This might account for dura variety being preferable and more adequate nutritionally than tenera.
Farmers` Perception on Privatization and Commercialization of Agricultural Extension Services in Oshimili North and South Local Government Areas of Delta State
U.N. Uzokwe,A.U. Ofuoku
Agricultural Journal , 2013,
Abstract: Up to early 1980s in Nigeria, like most developing countries Public Enterprises (PEs) were used for resource mobilization and allocation for many decades. From the 1980s a combination of factors forced government to review their dependence on PEs. These included their inability to perform their expected roles which resulted in huge financial losses, therefore putting a pot of stress on public finances. The government perceived commercialization and privatization as the solution to this problem. One of these government financed enterprise which has steadily declined is the agricultural sub sector. The decline in the agricultural sub sector affected the extension services which used to be effective in the carrying of innovation to farmers to improve their level of agricultural production. There is urgent need to stem this dangerous tide. As a result of this problem this study sought the opinion of farmers in oshimili south and north Local Government Areas (LGA) of Delta State to enable the government determine the best option to adopt to better extension services to farmers. A total of 120 farmers were sampled randomly from each of the 10 wards that make up each of the Local Government Area (LGA). The study showed that the mean age of farmers was 46 years, 97% were married with an average of five children. As regards extension agent contact 60% have had contact but are not being visited. About 83% of farmers got inputs, 49.8% paid for the inputs while 33.2% did not pay. Most of the farmers (80%) are willing to pay for inputs but 90.6% are unwilling to pay for extension service. They are also not in support of privatization of extension services (70%). From the result of the study it is not advisable to privatize or commercialize extension services now since the farmers cannot pay for the services because of their very poor income.
Administration of In-Service Training and Teachers Attitude to Work in Private Secondary Schools in Cross River State of Nigeria
U.I. Udofia,U.N. Ikpe
International Journal of Academic Research in Business and Social Sciences , 2012,
Abstract: The study was designed to investigate the influence of administration of in-service training and teachers attitude to work in private secondary schools in Cross River State of Nigeria. The sample comprised 800 teachers, randomly selected from a population of 2946 teachers. The null hypothesis that guided the study was tested with a set of questionnaire. Independent t-test statistical tool used to analyze the data yielded the finding that administration of in-service training programme significantly influences teachers’ attitude to work in private secondary schools. On the basis of the above finding, it was recommended among other things that systematic and regular in-service training courses should be organized by the proprietors of private secondary schools. These training courses would up-date, motivate and enhance teachers teaching skills for effective performance.
Antibacterial Activity of Ginger (Zingiber officinale) Roscoe and Garlic (Allium sativum L.) Extracts on Escherichia coli and Salmonella typhi
U.N. Ekwenye,N.N. Elegalam
International Journal of Molecular Medicine and Advance Sciences , 2011,
Abstract: The antibacterial activity of the ethanolic extracts of garlic and ginger against E.coli and S. typhi were positive. Though the growth inhibitory response varied with thetype of bacterial species tested and the type of extract. Ethanolic extract of ginger inhibited E. coli showing 9.00 mm diameter while S. typhi was inhibited w ith 10.00 mm diameter. The aqueous extract of garlic had no inhibitory effect on the two test organisms, but the aqueous extract of ginger inhibited S. typhi showing 8.0 mm diameter. Only the paper disc diffusion method was used and it gave clear zones of inhibition. In determination of minimum inhibitory concentration (MIC), it was observed that the range was between 75 mg mL 1 and 250 mg mL 1 of the concentrations. At any dilution below 75 mg mL 1 concentration, there was no growth inhibition by any extract. The results indicated that the aqueous extract had little or no inhibition while ethanolic extracts had a higher inhibitory effect in vitro against specific bacteria, E. coli and S. typhi, confirming their use in folk medicine.
A Linear Goal Programming Model for the Linear Absolute Value Regression Problem
U.N. Bassey,E.O. Effanga
Journal of Modern Mathematics and Statistics , 2012,
Abstract: In this study, we reformulate the linear absolute regression problem as a linear goal-programming problem, whose associated dual problem is obtained and exploited computationally to estimate the regression parameters. It is shown that the goal programming method of estimating the regression parameters is better, in terms of the total absolute error, than the least squares method.
CHARACTERIZATION OF X-BAND MICROWAVE COMPONENTS USING VECTOR NETWORK ANALYZER E5071C
U.N.SUBHADRA DEVI,Dr. M.SATYANARAYANA
International Journal of Engineering Science and Technology , 2013,
Abstract: Microwave and RF testing has gained importance with increased number of microwave applications in diversified fields like defense, domestic and space applications. The characteristics of the microwave devices are found by proper examination of S-parameters, which relates power levels at different ports by using sparameter values, auxillary parameters like insertion, isolation, coupling, VSWR ,reflection coefficient etc., can be obtained. Network Analyzer is a sophisticated testing device which is used to characterize active and passive components, such as amplifiers, mixers, duplexers, filters, couplers, and attenuators. These components are used in systems as common and low-cost as pagers, or in systems as complex and expensive as communications or radar systems. Components can have one port (input or output) or many ports. The ability to measure the inputcharacteristics of each port, as well as the transfer characteristics from one port to another, gives designers the knowledge to configure a component as part of a larger system. In this paper we find the different auxiliary parameters for different X-band microwave components like directional coupler, attenuator, isolator and circulator. These components are tested by using vector network analyzer and gives different parameters like magnitude, phase, and group delay over certain frequency range in a single moment. In this work with dynamic frequency range of 300kHZ to 14GHZ is used to test the micro wave X-band devices and the results obtained like VSWR, S-parameters, coupling factor, insertion and the isolation are very accurate.
Effect of Water Hyacinth Infestation on the Physicochemical Characteristics of AWBA Reservoir, Ibadan, South-West, Nigeria
U.N. Uka,K.S. Chukwuka
Journal of Biological Sciences , 2007,
Abstract: Water hyacinth infested and open water areas in AWBA reservoir were sampled fortnightly between July and November 2005. The effect of water hyacinth infestation on the aquatic biota was assessed using physico-chemical parameters. The study showed that conductivity, total suspended solids, free carbon dioxide and turbidity were significantly higher (p<0.05) in water hyacinth infested area than in open water. Dissolved oxygen, pH and nitrate-nitrogen were significantly lower (p<0.05) in the infested areas when compared with open water. Temperature was higher in the infested area than open water but was also not significant (p>0.05). The study suggested that water hyacinth infestation negatively impacted on the reservoir and therefore should be eradicated.
Effect of Water Hyacinth (Eichornia crassippes) Infestation on Zooplankton Populations in Awba Reservoir, Ibadan South-West Nigeria
K.S. Chukwuka,U.N. Uka
Journal of Biological Sciences , 2007,
Abstract: The effects of water hyacinth infestation on the distribution, abundance and species composition of zooplankton in Awba reservoir were investigated. Samples were collected in each of the sampling areas (water hyacinth infested and open water) by vertical zooplankton hauls using 64 um bolting silk net. The samples were immediately fixed in 4% formalin for preservation. The species composition of the zooplankton from the sampled areas consisted of 3 taxa, comprising of 6 species of Cladocera (Moina sp., Ceriodaphnia sp., Pleuroxus sp., Diaphanosoma sp., Chydorus sp. and Leydigia sp.) 6 species of Rotifers (Asplanchna sp., Trichocerca, Filinia sp., Polyarthra sp., Brachionus sp. and Lecane sp.) and 3 species of Copepoda (Cycloid copepods, Copepodite nauphii and Calanoid copepods. However, the study showed that the Rotifers had higher numerical abundance in the study areas. Water hyacinth infested area had a total density of 95 individuals/L while open water had 215 individuals/L. The study showed that the density of zooplanktons were significantly lower (p< 0.05) in the infested area. Biotic indices such as Margalef`s and Simpson`s indices were lower in the infested area while Shannon-wiener diversity index was significantly lower (p< 0.05) in the water hyacinth infested area. The result suggests that water hyacinth dense mats affected the numerical abundance of the zooplanktons.
Page 1 /213228
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.