Physical characteristics of students’ residential environment in relation to dietary habits in University of Ilorin, Nigeria

The design of students’ residential environment has implication on their dietary habits. This study, which was conducted through a cross-sectional survey of students’ resident on-campus, describes the physical characteristics of students’ residential environment in relation to dietary habits in University of Ilorin, Nigeria. A multi-stage sampling technique was adopted and twelve (12) residence halls were purposively selected out of the twenty (20) residence halls on campus based on three criteria, namely: ownership, gender and design type. The systematic selection of 12% of students in each of the twelve (12) residence halls gave a total of 430 students that were used in the study. The data for the study were collected through the use of self-administered questionnaire and personal observation. Statistical analysis was done using the Statistical Package for Social Scientists (SPSS) software. The analytical tools used for the study were mainly descriptive statistics such as frequency tables and percentages. The result of the data analysis revealed that most (67%) of the residence halls had kitchen en suite design and most (92%) had butteries and restaurants within them to enhance the cooking and eating habits of students. The result also revealed that most of the food outlets (72%) in the residential environment were mainly butteries and snack shops while few were restaurants (18%). The study recommends that developers and stakeholders in student housing should pay more attention to the provision of facilities such as kitchens and restaurants that would enhance the cooking and eating of students within the residential environment.Keywords: Students’ residential environment, Physical characteristics, University students, Cooking and eatin

Dietary nano-dicalcium phosphate improves immune response and intestinal morphology of broiler chickens

Various levels of substitution of nano-dicalcium phosphate (nCaHPO4) for the calcium and phosphorus supplied by limestone and monocalcium phosphate were evaluated, based on weight change, serum constituents, immune response and intestinal morphology of broiler chickens. The birds were assigned to five dietary treatments containing 0% (control), 40%, 60%, 80%, and 100% substitution levels of nCaHPO4 from days 0 to 42. Data were collected for blood measurement and intestinal morphology and analysed with one-way analysis of variance. Feeds substituted with 40% nCaHPO4 showed a higher mean value of final weight and better feed conversion. The results revealed similar haematological parameters across the treatment groups. At the same time, nCaHPO4 influenced most of the serum biochemical constituents, such as calcium, phosphorus, glucose, albumin, and total protein. High concentrations of total protein were observed for birds fed 60% nCaHPO4 compared with other treatments. The highest comparable means for albumin were observed in birds fed 40% and 60% nCaHPO4. Cholesterol levels were increased when birds were fed 0% and 40% of diets. Elevated serum phosphorus concentration was observed when 0%, 40%, 60% and 100% substitution levels were fed, whereas 80% presented the least mean value. The results also showed that birds fed 40% nano-dicalcium phosphate had the highest villi length, which signified improved absorption of minerals. In conclusion, 40% and 60% levels of nCaHPO4 could be used to boost immune response and functional intestinal morphology of broiler chicken with no negative effect on haematological parameters

Predictive Modelling of a K-Unit Bottling Plants for Reliability Improvement

espective hour of operation. The series network framework consists of a rinser machine, filler machine, capping machine, labeling machine and coding machine. The reliability of each system was evaluated by assuming a failure rate, to each subsystem and the mean time to failure was equally evaluated. Based on the calculation using the predicted model, at a mission hour of 24,168,312 and 456 hours, the respective reliabilities were; 0.3829, 0.0012, 0.0000038 and 0.000000012. The result showed that the reliability of the system decreases drastically with increasing mission time. Based on this result, the productivity of the plants is expected to be very low, hence the need to improve the reliability. The result also showed that the predicted model is good and efficient in predicting and improving plant performance. Further to this results, the reliability of the bottling machines can be improved by applying the developed model

Forensic Investigation of a Failed Intermediate Starwheel Spur Gear Tooth in a Filler Machine

determine the root cause of failure and how to prevent subsequent failures. Thus, the study focused on the analysis of a failed intermediate star wheel spur gear tooth using metallographic observations. Three (3) different failed gear teeth were selected and prepared as metallographic samples. Each of the samples were observed under the optical microscope at different magnifications, ranging from 10, 40 and 100 μm. Further to this, the samples were subjected to visual observation. The result obtained from the microstructures were further analysed using 3D surface analyser. The result of visual observations revealed the presence of wear debris around the failed teeth, while the optical micrographs depicted the occurrence of pitting corrosion, Also, observed were regions that show zones of high stress raisers. The results from the 3D surface analyser further demonstrates the occurrence of variation in wear distribution with some zones under higher intensity of material erosion. This may be due to the presence of backlash during the meshing of the gears. The pattern of the results is therefore suggestive of the fact that the gear material was not properly matched with the operation environment. The study also looked at the economic effect of the downtime which the gear failure poses on the productivity of the filler machine

SHORT COMMUNICATION: Determination of the minor and trace elements in Biriniwa's tin pyrite and ornamental lead/zinc ore using neutron activation analysis

Preliminary results of analysis of two common decorative/ornamental minerals analysed for minor and trace elements with the neutron activation analysis technique are discussed. The samples of interest were the Biriniwa tin pyrite, which the local indigenous used to paint their huts and the ornamental lead which women use to adorn their eyelashes nation-wide. These samples were irradiated along the certified reference sample, CANMET-BLI, with thermal neutron at the Julich Reactor Centre, Julich, Germany. The prominent elements determined in the ornamental lead included zinc (35.8%), iron (6.15%), Na, Sb, Cd, Hg, Ag and Co at trace level (g g-1). Tin pyrite sample was found to contain traces of Na, K, As, Br, Sb, Fe, La, Nd, Sm and Ce as the prominent impurities. Lead and tin, the major elements, respectively, of the lead/zinc ore and tin pyrite samples were determined by classical methods. (Received November 28, 2001; revised August 19, 2002) (Bulletin of The Chemical Society of Ethiopia: 2002 16 (2): 207-212

Disposition of Secondary Students towards Charcoal Production in Ibarapa North Local Government Area of Oyo State

The study assessed the disposition of secondary school student towards charcoal production. A multistage sampling technique was used to select 225 respondents from six secondary schools in the area. Information was elicited from the respondents with the aid of a questionnaire, information collected was analyzed using descriptive (Frequency, percentages, tables and mean) and inferential (chi-square and T-test) statistical tool. The result of the study shows that there is no gender bias in the involvement in the charcoal activities as 50.7% are males, with mean age of 17 years and household size of 8. The result also revealed that 68% of the students are involved with an average period of 4 years while 35% reported their parents are also involved and make an average of N8, 754 on monthly basis. On the activities they are involved in the findings revealed that they are involved in different activities with transportation being the major one while the need to make more money (49.4%), being common occupation in the community (48%) and the prestige associated with it (41.3%) as the major influencing factors of their involvement. Their disposition was largely indifferent (88%) as revealed by the study as many of them are involved just to get the benefit without considering the effect on them. The result of the T-test (t-value 4.117, p=0.000 at P< 0.005) reveals significant difference in the disposition of those involved and those not involved while the chi-square analysis also showed significant relationship between sex(χ2 = 29.874, p = 0.000), household size(χ2 = 17.472, p = 0.002) and parental involvement (χ2 = 8.855, p = 0.012) at p < 0.05. The study therefore concluded that the students are involved and are indifferent in their disposition to charcoal production and recommend that there is a need for proper orientation of the student in relationship to their involvement while inculcating teaching on environmental sustainability. Keywords: Charcoal, Youth, Disposition, Oyo state, Ibarapa and Involvement

Organisational Support, Knowledge Sharing and Utilisation as Correlates of Social Capital of Insurance Managers in Lagos Metropolis

Managers in insurance companies in Nigeria went through a difficult period after the recapitalization which was aimed at achieving a consolidation that will produce companies capable of meeting claims obligations, compete at the continental and global levels, increase the industry’s low retention capacity which had stunted its growth among others. This study therefore examined the organisational support, knowledge sharing and utilisation as correlates of social capital of insurance managers in Lagos metropolis. This research adopted the correlation type of descriptive survey design to determine the direction and degree of the relationship or association between variables. Total enumeration technique called census coupled with a self-developed questionnaire was used to collect data on a population size of 280 managers in 23 insurance companies in Lagos metropolis, out of which 211 responded giving a response rate of 75.4 percent.The study found out that organisational support, knowledge sharing and utilisation had significant multiple effect on social capital of the respondent (R = 0.656, p < 0.05). In addition, each of the independent variables, namely, organisational support, knowledge sharing and utilisation significantly predicts the social capital of the respondents respectively.The study recommends among others that knowledge utilisation and information literacy education should be inculcated in the training of managers since they are the critical decision makers in the firm. This may improve the managers’ ability to exploit the sum of the actual and potential resources embedded within, available through, and derived from the their network of relationships. This may also encourage the managers to freely exchange ideas, insight, information and knowledge.. Keywords: Organisational support, knowledge sharing, knowledge utilisation, Insurance companies, Nigeria

Intestinal intussusception due to concurrent infections with Hymenolepis nana and Dentostomella translucida in an African giant rat (cricetomys gambianus). A case report

A rare case of intestinal intussusception due to multiple worm infections (Hymenolepis nana and Dentostomella translucida) was observed in an African giant rat (Cricetomys gambianus, Waterhouse, 1840). The condition was observed as an incidental finding before an experimental dissection of the animals in the Department of Veterinary Anatomy, University of Agriculture Abeokuta, Nigeria. The rat was anorexic and depressed with rough hair coat, and died before the commencement of the experiment. Grossly, the intussusception was 7 cm in length and 27 cm caudal to the stomach and 81cm to the ileo-caecal junction. The affected part of the small intestine was moderately distended with worms and the associated mesenteric blood vessels were engorged. Microscopically, worms (H. nana and D. translucida) were observed in the lumen of the intestine with severe cellular infiltration mostly eosinophils, neutrophils and macrophages. Eggs of both worms, at different stages of development and a focus of attachment of the worms were observed on the intestinal mucosa. The zoonotic implications of these worms were discussed especially H. nana. This report appears to be the first reported case of intestinal intussusception due to multiple helminth infections in an African giant rat. KEYWORDS: Hymenolepis nana, Dentostomella translucida, Intestinal intussusception, African giant rat

STUDIES ON PECTINOLYTIC AND PROTEOLYTIC ENZYMES FROM DETERIORATED GRAPES (Vitis vinifera)

The ability of microorganisms to cause grape (Vitis vinifera) fruit deterioration by production of pectinolytic and proteolytic enzymes to degrade the plant cell was carried out in the Microbiology laboratory of the Department of Biological Sciences, Covenant University, Ota, Ogun State, Nigeria. A bunch of grape fruit was purchased from a local market in Ikeja, Lagos, South West, Nigeria. These samples were allowed to rot for five days in a clear packaging bag. The grape samples were disinfected and cultured on nutrient agar and potato dextrose agar for bacterial and fungal isolates respectively. The morphological and microscopic characteristics of the isolates in combination with a series of biochemical tests were used to identify them. The isolates were tested for their ability to produce pectinolytic and proteolytic enzymes. Aspergillus sp, Mucor sp, Rhizopus sp., Micrococcus sp., and Bacillus sp. were the organisms isolated from this study. The results of this investigation revealed appreciable pectinolytic, and proteolytic enzymes by Aspergillus niger and Bacillus sp. These organisms can be utilized as good sources of industrial enzymes.Keywords: Grape (Vitis vinifera) fruits; Pectinase, Protease, Fungal isolates and Bacterial isolate