Assessment of Pollution-Induced Dissolved Oxygen Variation in River Challawa

The study is aimed at investigating the effect of industrial effluents on the water quality of River Challawa. Chemical analyses of samples of the river water collected at predetermined sampling points along a 10.644 km stretch were undertaken and the observations were subjected to ANOVA and regression analyses.The results obtained indicated that the DO values ranged from 2.4 mg/l to 1.9 mg/l, while the BOD5 ranged from 443 mg/l to 1654 mg/l; the COD ranged from 1296 mg/l to 4565 mg/l. The self-purification factor (f) for the River Challawa varies between 0.40 per day and 0.56 per day which puts the river in the sluggish stream category and as a heavily polluted stream. The predictions indicated significant relationship with the observed values at 95% level of significance.http://dx.doi.org/10.4314/njt.v34i3.2

Socio-Economic Importance of Tree Nursery Enterprises in Lagos State, Nigeria

There is a growing interest to understand the role of tree nursery enterprises in Nigeria and the horn of Africa. Tree nursery enterprises, which are vital economic activities in major cities of Nigeria and particularly in the city of Lagos are not adequately studied and well documented. Therefore, this study seeks to fill a gap in understanding the socioeconomic importance and profitability potential of tree nursery enterprises. Multistage sampling technique with a 3-stage design was adopted in this study using aquantitative data collection techniques through the use of structured questionnaire administered to 120 nursery entrepreneurs. Data were analyzed using descriptive, inferential, and budgetary analysis. The result revealed that tree nursery entrepreneurs are literate, mostly male in their youthful age. Furthermore, the total annual revenue earned by the respondents was \u20a61,712,222.22 with a mean annual net income of \u20a61,458,038.72 while the return per naira invested was \u20a65.71. This shows that tree nursery enterprise is profitable in the study area. However, most entrepreneurs were faced with shortage of land for establishments of tree nursery in the study area. Therefore, appropriate actions in reducing cost of land lease/purchase are recommended to encourage new entrepreneurs and strengthen the sector\u2019s development

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