Moisture sorption isotherms of Mesquite seed (Prosopis africana)

Moisture profoundly influences product attributes such as quality and safety. The knowledge of moisture sorption isotherm is essential to determine products stability, and needed for design of storage, packaging and drying systems for extension of shelf lives. This study is to develop sorption isotherms of Prosopis africana.The moisture sorption isotherms of the seed were determined at temperatures of 20ºC, 25ºC and 30ºC, over a relative humidity range of 11%-100% using the static gravimetric technique. A linear regression programme was used to fit five isotherm models; GAB, Oswin, Halsey, Henderson, and Chung Pfost to the experimental data and compared using the root mean standard error, regression coefficient, standard error of estimate, and randomness of residuals.The adsorption and desorption isotherms of the seed followed the type II isotherm which exhibited a sigmoidal curve and also resulted in a hysteresis effect. At 20oC, Chung Pfost gave the best for the Prosopis africana in the adsorptive mode while at 25oC, the GAB, Henderson and Chung Pfost models gave the best fit. At 30oC, the Henderson and Chung Pfost had a good fit. Through all the temperatures for the prosopis Africana in the adsorptive mode, the Chung Pfost model has the best fit all through. In the desorption mode of Prosopis africana at 20oC and 25oC, the r2 for Chung Pfost, Henderson, GAB, Halsey, and Oswin range from 0.854 to 0.956 and 0.896 - 0.966 respectively. All the five models gave a good fit. At 30oC, the Chung Pfost, GAB and Henderson gave the best fit

Pattern of distribution of reactive localised hyperplasia of the oral cavity in patients at a tertiary health institution in Nigeria

Background: Reactive localized hyperplastic lesions of the oral cavity (RHLs) are relatively common peripheral lesions which present as a range of clinically similar lesions at dental centers. Diagnosis can be challenging if dentists are unfamiliar with their clinicopathological across various populations.Objective: This study reviews the pattern of distribution of RHLs of the oral mucosa in a hospital- the Obafemi Awolowo University Teaching Hospital Complex (OAUTHC), Ile-Ife.Materials and methods: We reviewed 10 years data from the archives of the Department of Oral Maxillofacial Surgery and Oral Pathology, Obafemi Awolowo University, Nigeria. Information on RHLs were extracted and recorded on standardized data forms and analyzed using STATA.Results: The most common lesions were pyogenic granuloma (43.7%) and focal fibrous hyperplasia (39.7%), respectively. RHLs were found to be more frequent in women (66.7%) than men (33.3%). The most common locations of involvement was the gingivae (84.6%), and lesions were more common in the 9–29 year age group and the mean age was 37.7 (±21.1) years. The relationship between age group and reactive lesions was however not statistically significant.Conclusion:  The major benefit of this study is an improved knowledge of the frequency and distribution of oral reactive le- sions in sub-Saharan Africa which may be highly beneficial when establishing a diagnosis and treatment plan in clinical practice.Keywords: Focal fibrous hyperplasia, oral mucosa, peripheral giant cell granuloma, peripheral ossifying fibroma, pyogenic gran- uloma, reactive hyperplasia

Biological and Non-Biological Methods for Lignocellulosic Biomass Deconstruction

Owing to their abundance and cost-effectiveness, lignocellulosic materials have attracted increasing attention in clean energy technologies over the last decade. However, the complex polymer structure in these residues makes it difficult to extract the fermentable sugars. Therefore, various pretreatment regimes have been used resulting in the breaking of lignocelluloses’ physical and chemical structures, thereby enhancing the availability of the polysaccharides which are subsequently hydrolysed into different biocommodities. This chapter provides an evaluation of some of the latest exploited methodologies that are used in the pretreatment of lignocellulosic materials. Moreover, the chapter discusses the advantages and disadvantages of each method

Pattern of distribution of reactive localised hyperplasia of the oral cavity in patients at a tertiary health institution in Nigeria

Background: Reactive localized hyperplastic lesions of the oral cavity (RHLs) are relatively common peripheral lesions which present as a range of clinically similar lesions at dental centers. Diagnosis can be challenging if dentists are unfamiliar with their clinicopathological across various populations. Objective: This study reviews the pattern of distribution of RHLs of the oral mucosa in a hospital- the Obafemi Awolowo University Teaching Hospital Complex (OAUTHC), Ile-Ife. Materials and methods: We reviewed 10 years data from the archives of the Department of Oral Maxillofacial Surgery and Oral Pathology, Obafemi Awolowo University, Nigeria. Information on RHLs were extracted and recorded on standardized data forms and analyzed using STATA. Results: The most common lesions were pyogenic granuloma (43.7%) and focal fibrous hyperplasia (39.7%), respectively. RHLs were found to be more frequent in women (66.7%) than men (33.3%). The most common locations of involvement was the gingivae (84.6%), and lesions were more common in the 9\u201329 year age group and the mean age was 37.7 (\ub121.1) years. The relationship between age group and reactive lesions was however not statistically significant. Conclusion: The major benefit of this study is an improved knowledge of the frequency and distribution of oral reactive lesions in sub-Saharan Africa which may be highly beneficial when establishing a diagnosis and treatment plan in clinical practice. DOI: https://dx.doi.org/10.4314/ahs.v19i1.45 Cite as: Soyele OO, Ladeji AM, Adebiyi KE, Adesina OM, Aborisade AO, Olatunji AS, et al. Pattern of distribution of reactive localised hyperplasia of the oral cavity in patients at a tertiary health institution in Nigeria. Afri Health Sci. 2019;19(1). 1687-1694. https://dx.doi. org/10.4314/ ahs. v19i1.4

SOCIAL ENTREPRENEURSHIP AND ORGANIZATIONAL COMMITMENT IN THE HOSPITALITY INDUSTRY

This study tested the influence of social orientation of hospitality industry in Abeokuta, Ogun State capital on the organizational commitment of their employees. Using a descriptive design of survey, we analyzed the effect of social entrepreneurship on the common three dimensions of organizational commitment (normative, affective, and continuance). Data for the study were obtained from 315 employees from the industry using an instrument that was well validated. Our analysis suggested that social entrepreneurship positively and significantly explains organizational commitment of the surveyed staff from the industry along the three dimensions of commitment with normative commitment showing the greatest effect of social orientations of the industry. The study concluded that social entrepreneurship is a potent organizational variable that can be used to engender commitment of staff especially their normative commitment

Population balance modelling of drum granulation of materials with wide size distribution

A population balance model is developed to describe the drum granulation of feeds with a broad size distribution (e.g. recycled fertiliser granules). Granule growth by coalescence is modelled with a sequential two-stage kernel. The first stage of granulation falls within a non-inertial regime as defined by Ennis et al. (Powder Technol., 65 (1991) 257-272), with growth occurring by random coalescence. The size distribution is observed to narrow and quickly reach an equilibrium size distribution. Further growth then occurs within a second inertial stage of granulation in which the granule size distribution broadens and requires a size-dependent kernel. This stage is much slower and granule deformation is important. Non-linear regression is used to fit the model to the experimental data of Adetayo et al. (Chem Eng. Sci., 48 (1993) 3951-3961) for granulation of ammonium sulfate, mono-ammonium phosphate and di-ammonium phosphate for a range of moisture contents, granulation times and initial size distributions. The model accurately describes the shape of the granule size distributions over the full range of data. The extent of granulation occurring within the first stage is given by kt; the extent of growth kt is proportional to the fractional liquid saturation of the granule, S, and increases with binder viscosity. Here, k represents the rate constant for the first stage of growth and t represents the time required to reach the final equilibrium size distribution for the first stage. Changes to the initial size distribution affect kt by changing granule porosity and, therefore, liquid saturation. A critical saturation, S, is necessary for the second stage of granulation to occur, leading to further growth. For S≤S, a final equilibrium size distribution is reached before 5 min of granulation time. For S>S, granules are sufficiently deformable to continue growing for up to 25 min. S decreases with increasing binder viscosity. This model is suitable for use in dynamic simulation of granulation circuits where both moisture content and recycle size distribution may vary significantly with time

Body composition of Kwara state basketball players - implications for peak performance: Body composition of Kwara state basketball players - implications for peak performance

This study was carried out to evaluate the body composition of Basketball players in Kwara State, Nigeria. Physical characteristics of age, height and weight, the percentage body fat, fat mass, fat free mass and muscle mass were measured using standardized methods. Purposive sampling technique was used to select the participants made up of twelve (12) junior and fifteen (15) senior male basketball players. Portable Bathroom-type Hanson, scale (model B1801) was used to measure weight in kilogrammes, Holtain Stadiometre for height in centimetres and Slim-guide Skinfold callipers (model MI 48170, U.S.A). One-way ANOVA was used to analyse the difference in physical characteristics of the participants; t-test was used to determine difference in the body composition of the senior and junior basketball players. Significant difference was found in the body composition. The senior team had significantly higher fat free muscle mass and less fat and percentage body fat (4.69) that was too low for continuous vigorous intensity workout. However, there were no significant differences in the fat mass and fat free mass; while significant difference was found in percent body fat, BMI and muscle mass of both the senior and junior teams. This implies that the senior team has better musculature than the junior team. It was concluded that there is need for nutritional intervention and carbohydrate loading prior to performance to meet up the energy demand for daily training programme and during performance in order to improve performance ability of the senior basketball players

Wpływ deficytu wody na poziom życia w gospodarstwach domowych na obszarze Iwoye-Ketu w nigeryjskim stanie Ogun

Water is an essential commodity which affects life and livelihoods in the universe. This study examined perceived effect of water scarcity on livelihoods in Iwoye-Ketu, Ogun State. Random sampling was used to select 80 rural households and water samples for the study. Data collected were analysed using descriptive, inferential and laboratory analyses. Findings showed that the mean age of respondents was 38 years with an average household size of four persons. The major sources of water were boreholes (97.5%) and rainwater (90.0%), the average trekking time to the water source was 24 minutes and the households requires an average of 162 litres of water per day. Water analysis’ result showed that the water has pH (6.87), total dissolved solids (0.175 mg∙dm–3), temperature (29.9°C) and turbidity (0.6 FTU). The major causes of water scarcity include insufficient rainfall (97.5%), increased sunlight intensity (97.5%), pollution of water sources (95.0%) and increased population (93.8%). About 60% of them perceived water scarcity to have a negative effect on their livelihoods. Correlation analysis shows that there is a significant relationship between usage of water (r = 0.370, p < 0.01) and perceived effect of water scarcity. It was concluded that water available for household use is not sufficient, although it is safe but contain some elements which are not of World Health Organization standard for good potable water. It is recommended that the community should build a hub for water collection and distribution close to the village centre and the government should provide water infrastructures to increase the supply of potable water.Woda jest podstawowym dobrem, które wpływa na życie i warunki życia na świecie. W przedstawionej pracy badano wpływ deficytu wody na poziom życia w Iwoye-Ketu w stanie Ogun. Do badań losowo wybrano 80 wiejskich gospodarstw i próby wody. Zebrane dane analizowano za pomocą metod opisowych, wnioskowania i metod laboratoryjnych. Średni wiek respondentów wynosił 38 lat, a średnia wielkość gospodarstwa – 4 osoby. Głównym źródłem wody były studnie wiercone (97,5%) i opady deszczu (90,0%). Średni czas dojścia do źródła wody wynosił 24 minuty, a gospodarstwa zużywały średnio 162 dm3 wody na dzień. Woda miała pH 6,87, sumę substancji rozpuszczonych 0,175 g∙dm–3, temperaturę 29,9°C i mętność 0,6 FTU. Do głównych przyczyn niedostatku wody zaliczano niewystarczające opady (97,5%), silne nasłonecznienie (97,5%), zanieczyszczenie źródeł wody (95,0%) i przeludnienie (93,8%). Około 60% respondentów uważało, że niedostatek wody wywiera ujemny wpływ na ich poziom życia. Analiza korelacji wykazała, że istnieje istotna zależność (r = 0,370, p < 0,01) między zużyciem wody a odczuciem negatywnego wpływu jej braku. Stwierdzono, że woda jest dostępna gospodarstwom w niedostatecznej ilości i choć bezpieczna, to zawiera pewne składniki, które nie spełniają norm Światowej Organizacji Zdrowia ustalonych dla wody pitnej. Zaleca się, aby lokalna społeczność zbudowała miejsce gromadzenia i dystrybucji wody blisko centrum wsi, a rząd powinien zapewnić infrastrukturę w celu poprawy zaopatrzenia w wodę pitną