Impact of Marble Mining on Soil Properties in a Part of Guinea Savanna Zone of Southwestern Nigeria

The effects of marble mining activities on the properties of soils of Igbeti marble area, Oke-Ogun, Southwestern Nigeria were investigated. Sample plots of 10 x 10 m2 were established at 150 m intervals from the factory site up to a distance of 600 m and with a sample plot at 10 km to serve ascontrol in four cardinal directions. A total of 84 composite soil samples from 21 established plots were taken for soil physico-chemical properties. No plot falls under agricultural crops. The results show that there is drastic deterioration in the quality of soil as a result of mining activities. There was increase in total porosity and decrease in bulk density of the soil as you move away from the mining site. The soil pH changed greatly from 5.90 in the control site to 8.20 in highly polluted soils. Soil organic matter,total nitrogen and available phosphorus decreased with increase in dust particulate from the mining sites. Except for Ca2+ and Mg2+ that decreased with distance from the mining site, Na+ and K+ increased slightly. The availability of the extractable micronutrients (Fe2+, Mn2+, Cu2+ and Zn2+) increased as the soil acidity increased, though Cu2+ availability dropped slightly at control site. It is concluded that there is the need for close monitoring of marble mining activities in Nigeria as deposit of marble particulates may result to soil nutrients’ imbalance and hence poor soil health especially in areas polluted with marble particulates.Key words: Mine waste, pollution monitoring, soil deterioration, soil pollution, soil nutrients’ imbalance.

An audit of the uptake of key PMTCT interventions in the pre and post who rapid advice periods at the university college hospital, Ibadan

Prevention of vertical transmission of HIV may require the uptake of the culturally unacceptable options of cesarean delivery and formula feeding. The successful use of HAART, as enumerated by the WHO 2009 rapid advice, has the potential for facilitating the uptake of the more culturally acceptable vaginal delivery and breast feeding. These recommendations became operational at the PMTCT unit, University College Hospital, Ibadan. This retrospective study describes the impact of these recommendations on the uptake of PMTCT interventions at our center. The pre-rapid advice period was June 2009 to April 2011 and the post rapid period May 2011 till December 2012. Pre-rapid advise, antiretrovirals administered was zidovudine or Combivir for women with CD4 >200cells / ml and Combivir/nevirapine for CD4 <200 Cells/ ml. Post-rapid, all were eligible for HAART (mostly efavirenz/ truvada or efavirenz/ Combivir). Six weeks post-natally, the options adopted were documented and are presented here. Information from 1165 women was available. Thirty three (2.8%) did not have adequate information and were excluded. There were 711 women pre-rapid advise and 421 women post rapid. The women's characteristics were not significantly different over both periods, 69.0% had >6 years of education, 97.0% were married and slightly over half (56.9%) were involved with traders. Overall, more women were delivered by the vaginal route than Caesarean Delivery (70.5% vs. 29.5%), while more breastfed compared to formula feeding (67.2% vs. 32.8%). In the post rapid period (compared to the pre- rapid) advise, more women had vaginal delivery (73.5% vs. 64.8%, p = 0.54), more women breast-fed (77.0% vs. 50.1%, p= 0.00) and fewer women used contraception (21.5% vs. 27.3%, p= 0.023). The commonest method was the condom (83.4%). The new WHO guidelines appear to have facilitated a shift in uptake of the more culturally acceptable options of vaginal delivery and breast feeding. A follow-up evaluation of the infant HIV status will ascertain the ultimate impact on MTCT

Prevalence of hypertension in the rural adult population of Osun State, southwestern Nigeria

EO Asekun-Olarinmoye,1 PO Akinwusi,2 WO Adebimpe,1 MA Isawumi,3 MB Hassan,3 OA Olowe,4 OB Makanjuola,4 CO Alebiosu,2 TA Adewole51Department of Community Medicine, 2Department of Medicine, 3Department of Surgery, 4Department of Microbiology, 5Department of Chemical Pathology, College of Health Sciences, Osun State University, Osogbo, Osun State, NigeriaBackground: The purpose of this study was to determine the prevalence of hypertension in two rural communities of Osun State, Nigeria.Methods: A consenting adult population of the Alajue and Obokun rural communities in southwestern Nigeria that presented for the screening exercise participated in this community-based cross-sectional descriptive study. Two hundred and fifty-nine respondents aged older than 18 years completed a standardized, pretested, structured questionnaire as part of activities celebrating World Kidney Day and World Glaucoma Day in 2011. Anthropometric data and blood pressure were recorded, and the data were analyzed using the Statistical Package for Social Sciences version 17.Results: The mean age of the respondents was 49.7 &plusmn; 1.6 years, 100 (38.6%) were males, 84 (32.4%) were farmers, and 111 (42.9%) were traders. The prevalence of hypertension was 13.16% (present in 34 respondents). Seventeen (6.6%) had isolated systolic hypertension, while 11 (4.2%) had isolated diastolic hypertension. Two hundred and thirty-six (91.1%) undertook daily exercise lasting at least 30 minutes and 48 (18.5%) had ever taken antihypertensive drugs on a regular basis. Four respondents (1.6%) claimed a family history of hypertension. The average body mass index (BMI) among respondents was 23.4 &plusmn; 4.9 kg/m2, 51 (19.6%) had a BMI of 25.0&ndash;29.9, and 30 (11.5%) had a BMI &ge; 30. A significant association existed between age older than 40 years and having hypertension (P < 0.05), while no relationship existed between age and BMI or between gender and hypertension (P > 0.05). Rates of older age and high BMI were significantly higher among hypertensives than among normotensives. Respondents with BMI < 25 had at least a three times greater likelihood of developing hypertension than those with BMI < 25 (odds ratio 2.9, 95% confidence interval 0.007&ndash;0.056, P = 0.011).Conclusion: The prevalence of hypertension is high in this study population and we recommend scaling up primary prevention efforts to reduce this in Nigerian communities.Keywords: prevalence, hypertension, anthropometry, body mass index, rural communit

Imputation of missing gas permeability data for polymer membranes using machine learning

Polymer-based membranes have the potential for use in energy efficient gas separations. The successful exploitation of new materials requires accurate knowledge of the transport properties of all gases of interest. Open-source databases of gas permeabilities are of significant potential benefit to the research community. The Membrane Society of Australasia (https://membrane-australasia.org/) hosts a database for experimentally measured and reported polymer gas permeabilities. However, the database is incomplete, limiting its potential use as a research tool. Here, missing values in the database were imputed (filled) using machine learning (ML). The ML model was validated against gas permeability measurements that were not recorded in the database. Through imputing the missing data, it is possible to re-analyse historical polymers and look for potential “missed” candidates with promising gas selectivity. In addition, for systems with limited experimental data, ML using sparse features was performed, and we suggest that once the permeability of CO2 and/or O2 for a polymer has been measured, most other gas permeabilities and selectivities, including those for CO2/CH4 and CO2/N2, can be quantitatively estimated. This early insight into the gas permeability of a new system can be used at an initial stage of experimental measurements to rapidly identify polymer membranes worth further investigation

The use of plants in the traditional management of diabetes in Nigeria: Pharmacological and toxicological considerations

Ethnopharmacological relevance: The prevalence of diabetes is on a steady increase worldwide and it is now identified as one of the main threats to human health in the 21st century. In Nigeria, the use of herbal medicine alone or alongside prescription drugs for its management is quite common. We hereby carry out a review of medicinal plants traditionally used for diabetes management in Nigeria. Based on the available evidence on the species׳ pharmacology and safety, we highlight ways in which their therapeutic potential can be properly harnessed for possible integration into the country׳s healthcare system. Materials and methods: Ethnobotanical information was obtained from a literature search of electronic databases such as Google Scholar, Pubmed and Scopus up to 2013 for publications on medicinal plants used in diabetes management, in which the place of use and/or sample collection was identified as Nigeria. ‘Diabetes’ and ‘Nigeria’ were used as keywords for the primary searches; and then ‘Plant name – accepted or synonyms’, ‘Constituents’, ‘Drug interaction’ and/or ‘Toxicity’ for the secondary searches. Results: The hypoglycemic effect of over a hundred out of the 115 plants reviewed in this paper is backed by preclinical experimental evidence, either in vivo or in vitro. One-third of the plants have been studied for their mechanism of action, while isolation of the bioactive constituent(s) has been accomplished for twenty three plants. Some plants showed specific organ toxicity, mostly nephrotoxic or hepatotoxic, with direct effects on the levels of some liver function enzymes. Twenty eight plants have been identified as in vitro modulators of P-glycoprotein and/or one or more of the cytochrome P450 enzymes, while eleven plants altered the levels of phase 2 metabolic enzymes, chiefly glutathione, with the potential to alter the pharmacokinetics of co-administered drugs. Conclusion: This review, therefore, provides a useful resource to enable a thorough assessment of the profile of plants used in diabetes management so as to ensure a more rational use. By anticipating potential toxicities or possible herb–drug interactions, significant risks which would otherwise represent a burden on the country׳s healthcare system can be avoided

Omics-based molecular techniques in oral pathology centred cancer: Prospect and challenges in Africa

: The completion of the human genome project and the accomplished milestones in the human proteome project; as well as the progress made so far in computational bioinformatics and “big data” processing have contributed immensely to individualized/personalized medicine in the developed world.At the dawn of precision medicine, various omics-based therapies and bioengineering can now be applied accurately for the diagnosis, prognosis, treatment, and risk stratifcation of cancer in a manner that was hitherto not thought possible. The widespread introduction of genomics and other omics-based approaches into the postgraduate training curriculum of diverse medical and dental specialties, including pathology has improved the profciency of practitioners in the use of novel molecular signatures in patient management. In addition, intricate details about disease disparity among diferent human populations are beginning to emerge. This would facilitate the use of tailor-made novel theranostic methods based on emerging molecular evidences