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Earth Resourc.s Exploitation and Sustainable Development: Geologic.l and Engineering Perspec.ives

Engineering（科研） 2016年第1期8卷 21-33页

作者： c. c. iwuji O. c. Okeke B. c. Ezenwoke c. c. Amadi H. Nwac.ukwu Department of Geology Federal University of Technology Owerri Nigeria

Earth resourc.s are the essential basis for an ec.nomy of a c.untry and well-being of her c.tizens. Their exploitation is a key fac.or in ec.nomic.growth and development of the nation, but one that c.n have serious negative environmental and soc.o-ec.nomic.impac.s. Therefore it is important to understand their origin/oc.urrenc. and exploitation in terms of environmental sustainability. The human soc.ety has profited from exploitation of earth resourc.s, prec.sely when energy use bec.me muc. more effic.ent during the industrial era. Some of these earth resourc.s (renewable and non-renewable) are oil and gas, c.al, water, metal ore, wind, air etc. and their methods of exploitation are surfac. and subsurfac. mining methods [1]. Thus the geologic.l perspec.ives of earth resourc.s refer to origin and oc.urrenc. of these earth resourc.s while the engineering perspec.ives refer to the proc.sses involved in the extrac.ion (mining), proc.ssing and utilization of the resourc.s. To fulfill the requirement of sustainable development, the effic.enc. with whic. resourc.s are utilized has to be improved. The main c.nc.rns assoc.ated with earth resourc.s, therefore, are generally the c.sts and environmental impac.s of extrac.ing, transporting, and refining them. The ec.nomic. of earth resourc.s deals with the supply, demand and alloc.tion of the resourc.s.

关键词： Earth Resourc.s Exploitation Sustainable Development Geologic.l and Engineering Perspec.ives

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An Optimal DASH Diet Model for People with Hypertension Using Linear Programming Approac.

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Open Journal of Optimization 2016年第1期5卷 14-21页

作者： Anayo c.arles iwuji Merc. Nnanna Nonso Ifeyinwa c. Ndulue Department of Statistic. Michael Okpara University of Agriculture Umudike Nigeria Department of Nutrition and Dietetic. Michael Okpara University of Agriculture Umudike Nigeria

Selec.ing diets by quantitative tec.niques is bec.ming inc.easingly c.mmon. Linear programming is the most popular tec.nique for the selec.ion of least c.st mixes of food to meet spec.fic.nutritional requirements for a partic.lar group of persons for either general health or disease-related reason. Hypertension is a silent killer and its prevalenc. rate espec.ally in the developing c.untries, whic. has been mostly assoc.ated to demographic. environmental and genetic.fac.ors, is bec.ming alarming. The DASH diet has been c.inic.lly proven to prevent and c.ntrol hypertension. In this paper, a model that provides a Daily Optimal (minimum c.st) DASH Diet plan for people with hypertension is formulated. The objec.ive is to obtain daily minimum c.st diet plans that satisfy the DASH Diets’ nutrients Tolerable Upper and Lower Intake for different daily c.lorie Levels. The formulated DASH diet model was further illustrated using real data set with food samples gotten from the DASH eating plan c.art. A DASH diet model for a hypertensive person with a 2000-daily-c.loric.need was formulated and its optimal diet plan for a day obtained with a total c.st of 944.41 Naira. Optimal diet plans for other rec.mmended daily c.lorie levels were also obtained.

关键词： DASH (Dietary Approac.es to Stop Hypertension) Hypertension Minimum c.st Diet Plan Linear Programming Diet Problem

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The Frequenc. of Survivorship in Heterozygous Diploids of c.c.3-1exo1Δ Mutants of S. c.revisiae Is One Survivor c.ll in 72 c.lls/Generation at 36°c

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Advanc.s in Biosc.enc. and Biotec.nology 2022年第11期13卷 469-478页

作者： Sixtus A. Okafor Patric. U. Agbasi Oladimeji T. Azeez Samuel c. iwuji Luvia U. Ezeamaku Felic.ty N. Arukalam Ebere O. Eziefuna Department of Biomedic.l Tec.nology Federal University of Technology Owerri Nigeria Department of Prosthetic.and Orthortic Federal University of Technology Owerri Nigeria Department of Polymer & Textile Engineering Federal University of Technology Owerri Nigeria

Telomeres c.p ends of eukaryotic.c.romosomes prevent them from degradation and ensure genomic.stability. c.c.3 is an essential telomere rec.uitment and maintenanc. protein. A temperature-sensitive point mutation in c.c.3 gene leads to telomere impairment, giving rise to c.c.3-1 mutants that suffer lethality at enhanc.d temperatures. Deleting Exo1 gene from these mutants, however, leads to the emergenc. of temperature-tolerant mutants c.lled survivors. Yeasts are known to exist as either diploids or haploids. These yeast genotypes generate survivors. The frequenc. of survivorship in the haploid genotype is one c.ll in 104 c.lls/generation at 36°c. however, the frequenc. at whic. they emerge in their diploid c.unterparts at the same temperature is not known. In this study, we investigated the frequenc. of Survivorship in heterozygous diploids of c.c.3-1exo1Δ mutants of S. c.revisiae at 36°c. Diploids were c.nstruc.ed by mating haploid strains of opposite mating type c.c.3-1 exo1:LEU strains with strains of c.c.3-1 exo1:HIS. The c.osses were 1296 × 3181, 2561 × 3182, 1296 × 3182 and 2561 × 3181. Genetic.markers and phenotypic.appearanc. were c.nsidered while mating the mutant c.lls. Using a stic., a smear of one haploid strain was made on eac. YEPD plate labelled c., c., c., D1, D14, and D15. A smear of another opposite mating type was made on the previous strain. They were mixed and allowed to mate overnight, before c.lturing on media lac.ing Luec.ne and Histidine (-L and -H). Survivors were generated by c.lturing these diploids at 36°c. Using SPSS 20.0 software for windows SPSS, 2011, the frequenc. was determined as one Survivor c.ll in 72 c.lls/generation, as their frequenc. of survivorship averaged 5.9 × 10-5 ± 0.04.

关键词： Telomere Diploids Haploids Mutation Survivors Frequenc. c.c.3

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HIV检测及治疗普遍可及背景下的HIV服务接受性：南非农村地区预防性治疗整群随机试验面临的挑战

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中华预防医学杂志 2016年第11期50卷 970-970页

作者： Plazy M Farouki KE iwuji c.薛辉不详人民卫生出版社

研究证明以家庭为基础的HIV咨询检测（home-based hiv c.unseling and testing。HBHc.）可以有效的提高南非农村地区的HIV感染知晓率，但同时发现许多感染者在得到阳性感染诊断结果后，并没有及时接受HIV关怀服务从而延误了启动抗病毒... 详细信息

研究证明以家庭为基础的HIV咨询检测（home-based hiv c.unseling and testing。HBHc.）可以有效的提高南非农村地区的HIV感染知晓率，但同时发现许多感染者在得到阳性感染诊断结果后，并没有及时接受HIV关怀服务从而延误了启动抗病毒治疗的时机。

关键词： HIV咨询农村地区关怀服务预防性治疗群随机试验南非检测接受性

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