Bolgatanga, Ghana
Bolgatanga, Ghana

The Bolgatanga Polytechnic is a public tertiary institution in the Upper East Region of Ghana. Wikipedia.

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Boamah P.O.,Jiangsu University | Boamah P.O.,Bolgatanga Polytechnic | Zhang Q.,Jiangsu University | Zhang Q.,Hainan University | And 4 more authors.
Carbohydrate Polymers | Year: 2014

Adsorption capacity of cross-linked low molecular weight chitosan pyruvic acid derivatives CSnPA-GLA (n = 8, 11) were examined by employing 23 factorial design method. Three (3) factors and two (2) levels of adsorbent dose (A) (0.05 and 0.1 g), adsorbent type (B) (CS8PA-GLA and CS11PA-GLA) and concentration of lead solution (C) (1 and 3 mg/L) were considered. From the statistical analysis, all the main parameters (A, B and C) and some interactions of the main parameters (AC and ABC) had influence on the adsorption process at 5% significance level. The adsorption process was greatly influenced by the adsorbent type (B). The adsorption equilibrium results correlated well with the Freundlich isotherm model. The adsorption kinetic data also correlated well with the pseudo second order. The thermodynamic studies also revealed that the nature of lead adsorption was spontaneous and endothermic. The findings suggest that CS8PA-GLA is better than CS11PA-GLA for lead sorption. © 2014 Published by Elsevier Ltd.

Boamah P.O.,Jiangsu University | Boamah P.O.,Bolgatanga Polytechnic | Huang Y.,Jiangsu University | Hua M.,Jiangsu University | And 5 more authors.
Ecotoxicology and Environmental Safety | Year: 2015

Chitosan is of importance for the elimination of heavy metals due to their outstanding characteristics such as the presence of NH2 and -OH functional groups, non-toxicity, low cost and, large available quantities. Modifying a chitosan structure with -COOH group improves it in terms of solubility at pH ≤7 without affecting the aforementioned characteristics. Chitosan modified with a carboxylic group possess carboxyl, amino and hydroxyl multifunctional groups which are good for elimination of metal ions. The focal point of this mini-review will be on the preparation and characterization of some carboxylate chitosan derivatives as a sorbent for heavy metal sorption. © 2015 Elsevier Inc.

Boamah P.O.,Jiangsu University | Boamah P.O.,Bolgatanga Polytechnic | Huang Y.,Jiangsu University | Hua M.,Jiangsu University | And 6 more authors.
Carbohydrate Polymers | Year: 2015

A 23 factorial design was used to examine the sorption of Cd2+ onto cross-linked low molecular weight chitosan pyruvic acid derivative. Three factors and two levels of solution pH (A) (6.0 or 10.0), temperature (B) (45 or 70°C) and Cd(II) concentration (C) (1 or 3 mg/L) were considered. Batch mode system was employed with 0.05 g of the sorbent and 25 mL of Cd(II) solution. The efficiency of cadmium removal during an exposition time of 4 h was then evaluated. The factors and their interaction effect on the cadmium removal efficiency followed the order: Cd(II) concentration > solution pH > interaction between solution pH and Cd(II) concentration > interaction between solution pH, temperature and Cd(II) concentration. Langmuir isotherm model was the best isotherm model. The Pseudo second order fitted well the kinetic data. The thermodynamic studies revealed the nature of the cadmium sorption. © 2015 Published by Elsevier Ltd.

PubMed | Jiangsu University, MMG, Hainan University, University Of Cape Coast and Bolgatanga Polytechnic
Type: | Journal: Ecotoxicology and environmental safety | Year: 2016

In this study, sorption of copper onto low molecular weight chitosan derivative was studied. Experimental parameters such as pH of the solution (A), temperature (B), dose of the sorbent (C), and concentration of solution (D) were considered. The statistical results indicated that the dose of sorbent (C) and Cu (II) concentration (D) influenced removal efficiency at 5% significance level. Also, some interactions such as ABCD, ACD, ABC and AC affected the removal process. The sorbent was characterized with FTIR, SEM and TG/DSC. Freundlich isotherm model was the best isotherm model. The kinetic study results correlated well with the pseudo-second-order model. The thermodynamic studies revealed that the nature of copper sorption was spontaneous and endothermic. Strong affinity of the sorbent for copper (II) was revealed by the Isothermal Titration Calorimetry (ITC) technique.

PubMed | Jiangsu University, Hainan University and Bolgatanga Polytechnic
Type: | Journal: Carbohydrate polymers | Year: 2016

The fusion of molecular and anatomical modalities facilitates more reliable and accurate detection in clinic. In this work, we prepared gadolinium (III) complex Gd-DTPA-FITC-CS11 with magnetic resonance (MR) and fluorescence dual-modal imaging modalities. Gd-DTPA-FITC-CS11 consisted of fluorescein isothiocyanate and low-molecular-weight chitosan (CS11) units conjugated with gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA). Gd-DTPA-FITC-CS11 exhibited a higher longitudinal relaxivity (14.09 mM(-1)s(-1)) than the clinical Gd-DTPA (3.85 mM(-1)s(-1)). T1-weighted MR contrast enhancement was also demonstrated the comparability to Gd-DTPA at lower dosage. The binding with bovine serum albumin (BSA) was investigated. The fluorescence of BSA in the presence of Gd-DTPA-FITC-CS11 was weakened due to static quenching mechanism. The conformation of BSA was slightly changed but -helix was dominant. The binding was entropy-driven and spontaneous and the main contribution was hydrophobic interaction. Our results suggested the potential of Gd-DTPA-FITC-CS11 as an MR/fluorescence dual-modal imaging contrast agent in improving the diagnostic sensitivity and accuracy.

PubMed | Bolgatanga Polytechnic, Kwame Nkrumah University Of Science And Technology, Swiss Tropical and Public Health Institute, University of Heidelberg and 3 more.
Type: | Journal: Global health action | Year: 2016

Lack of an adequate and well-performing health workforce has emerged as the biggest barrier to scaling up health services provision in sub-Saharan Africa. As the global community commits to the Sustainable Development Goals and universal health coverage, health workforce challenges are critical. In northern Ghana, performance-based incentives (PBIs) were introduced to improve health worker motivation and service quality.The goal of this study was to determine the impact of PBIs on maternal health worker motivation in two districts in northern Ghana.A quasi-experimental study design with pre- and post-intervention measurement was used. PBIs were implemented for 2 years in six health facilities in Kassena-Nankana District with six health facilities in Builsa District serving as comparison sites. Fifty pre- and post-intervention structured interviews and 66 post-intervention in-depth interviews were conducted with health workers. Motivation was assessed using constructs for job satisfaction, pride, intrinsic motivation, timelines/attendance, and organisational commitment. Quantitative data were analysed to determine changes in motivation between intervention and comparison facilities pre- and post-intervention using STATA version 13. Qualitative data were analysed thematically using NVivo 10 to explore possible reasons for quantitative findings.PBIs were associated with slightly improved maternal health worker motivation. Mean values for overall motivation between intervention and comparison health workers were 0.6 versus 0.7 at baseline and 0.8 versus 0.7 at end line, respectively. Differences at baseline and end line were 0.1 (The results contribute evidence on the effects of PBIs on motivational constructs among maternal health workers in primary care facilities in northern Ghana. PBIs appeared to improve motivation, but not dramatically, and the long-term and unintended effects of their introduction require additional study.

Afoakwah A.N.,Bolgatanga Polytechnic | Owusu W.B.,University of Ghana
Asian Journal of Clinical Nutrition | Year: 2011

Unhealthy lifestyle and eating habits have been associated with the increasing prevalence of diet-related non-communicable diseases such as cardiovascular disorders and hypertension. The study was a cross-sectional involving 320 underground male miners in the Obuasi municipality. The research was conducted to generate data on the associations between characteristics of underground miners, their nutrition and blood pressure. Cluster and simple random sampling techniques were used to select the respondents from their residential areas. Independent sample t-test and Spearman's correlation (2 tailed) were used to test the significance of associations between selected continuous variables, while Chi-square test was used to test for significance between categorical variables. Logistic regression was used to determine the extent to which significant variables predicted high blood pressure. Results indicated that apart from vehicle ownership (p = 0.02) and length of working underground (p<0.001). All other socio-economic variables did not indicate any significant association with blood pressure. About 41.6% of the respondents were hypertensive. The prevalence of obesity and overweight cases combined were 62.1%. Potassium intake correlated significantly and positively with systolic (r = 0.11, p = 0.04) and diastolic blood pressure (r = 0.13, p = 0.02). The risk of developing hypertension increased with age, with persons within the age categories of 30-39 years, 40-49 years and 50-59 years had odds ratios of 2.55 (95% CI: 1.12-5.81), 3.34 (95% CI: 1.45-7.68) and 7.56 (95% CI: 2.91-19.84), respectively. Nutrient intake and blood pressure monitoring must be part of the day-to-day programmes of the underground male miners. © 2011 Asian Network for Scientific Information.

Dukuh I.G.,Bolgatanga Polytechnic
Asian Journal of Agricultural Research | Year: 2011

Sweet potato (Ipomoea batatas L.) is the seventh most important food crop. In the tropics it is a staple food in many developing countries and it also serves as animal feed and raw material for many industries. The utilization of sweet potato in many countries has declined which can partly be due to pre and post-harvest losses resulting in excessive waste which has increased prices. The study was conducted to determine the effect of time of pre-harvest defoliation of sweet potato vines on yield performance and quality of sweetpotato and tuberpotato in the Coastal savanna of Ghana. To do this the effect of defoliation and variety on the quality of tubers were studied. Two improved varieties; TIS 86-3017 and TIS 8266 and a local variety, Cape Coast, were subjected to pre-harvest defoliation period of 12, 8 and 4 days before harvesting. A fourth treatment was without defoliation and was designated 0 that is no defoliation. The experiment examined the effect of genotypes and defoliation on tuber quality. The experiment revealed that the improved varieties were no better than the local variety in their yields, resistance to fungal decay and extent of rodent attack. The improved varieties were more susceptible to Cylas weevil infestation in the field than the local variety. The improved varieties suffered more damaged during harvesting and sprouted more in the field than the local variety. Defoliation before harvesting reduced weevil infestation, fungal decay and bruising of tubers during harvesting and handling. However, defoliation increased sprouting of tubers from 2.5% for tubers which were not defoliated to 14.2% in tubers which were defoliated 12 days before harvesting. © 2011 Knowledgia Review, Malaysia.

Salifu T.,Bolgatanga Polytechnic | Agyare W.A.,Kwame Nkrumah University Of Science And Technology
ARPN Journal of Engineering and Applied Sciences | Year: 2012

Distinguishing land use types is mostly done through field surveys which does not easily capture the spatial changes in the land use/cover types. In this study, the Surface Energy Balance Algorithm for Land (SEBAL) model was used to estimate surface albedo and NDVI, for different land use/cover types for two sub-catchments (i.e., Atankwidi and Afram) in the Volta Basin of Ghana. The mean coefficient of variation (CV) for individual land use/cover types compared to the mean CV for a given site was then used to distinguish among the land use/cover types. It was found that these parameters derived from the SEBAL model can be used to distinguish among different land use/cover types in the two subcatchments. SEBAL estimates for surface albedo and NDVI across the different land use/cover types varied from 0.05 to 0.22 and -0.41 to 0.38, respectively. The range of CVs for surface albedo and NDVI, were 5-22% and 7-175%, respectively across the different land use/cover types for the two catchments. The results of this study demonstrate that SEBAL's derived surface albedo and NDVI can be used to distinguish land use/cover types in catchments similar to those of the study areas with few ground measurements. © 2006-2012 Asian Research Publishing Network (ARPN).

Laary J.K.,Bolgatanga Polytechnic
Journal of Agricultural, Food, and Environmental Sciences | Year: 2012

This study was conducted in four districts of the Upper East region of Ghana to determine different agrochemical products sold to farmers, and the extent to which farmers use them on their crops, especially during dry season. The results showed that all kinds of highly hazardous, adulterated, and inappropriate chemical products are sold by dealers to farmers. Some of the agrochemicals sold to farmers had their labels scraped off; some were expired, while others had been transferred into different containers. Some of the agrochemical products the farmers currently use on their crops have been banned by the relevant government authorities because of their persistent, toxic, and poisonous nature. A good number of the farmers (74%) who buy the agrochemicals are illiterates, most of who do not protect themselves, and are unaware of dangers of exposure during handling, formulation, and application of agrochemicals. Fruits and vegetables are harvested within days after last agrochemical application, regardless of health implications. Most of the farmers (89%) know only synthetic chemicals and the few who know other alternatives do not see their importance or are not interested. There is therefore the need for farmer education and participatory practices on safe usage of agrochemicals to safeguard humans, other beneficial life-forms, and the environment.

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