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| 1 | A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints显示文摘The origin and petrogenesis of the Cameroon Volcanic Line(CVL),composed of volcanoes that form on both the ocean floor and the continental crust,are difficult to understand because of the diversity,heterogeneity,and nature of available data.Major and trace elements,and Sr-Nd-Pb isotope data of volcanic rocks of the CVL spanning four decades have been compiled to reinterpret their origin and petrogenesis.Volcanic rocks range from nephelinite,basanite and alkali basalts to phonolite,trachyte and rhyolite with the presence of a compositional gap between Si O258e64 wt.%.Similarities in geochemical characteristics,modeled results for two component mixing,and the existence of mantle xenoliths in most mafic rocks argue against significant crustal contamination.Major and trace element evidences indicate that the melting of mantle rocks to generate the CVL magma occurred dominantly in the garnet lherzolite stability field.Melting models suggest small degree(<3%)partial melting of mantle bearing(6e10%)garnet for Mt.Etinde,the Ngaoundere Plateau and the Biu Plateau,and<5%of garnet for the oceanic sector of the CVL,Mt.Cameroon,Mt.Bambouto,Mt.Manengouba and the Oku Volcanic Group.The Sr-Nd-Pb isotope systematics suggest that mixing in various proportions of Depleted MORB Mantle(DMM)with enriched mantle 1 and 2(EM1 and EM2)could account for the complex isotopic characteristics of the CVL lavas.Low Mg number(Mg#100 Mg O/(Mg O t Fe O))and Ni,Cr and Co contents of the CVL mafic lavas reveal their crystallization from fractionated melts.The absence of systematic variation in Nb/Ta and Zr/Hf ratios,and Sr-Nd isotope compositions between the mafic and felsic lavas indicates progressive evolution of magmas by fractional crystallization.Trace element ratios and their plots corroborate mantle heterogeneity and reveal distinct geochemical signatures for individual the CVL volcanoes. | Asobo N.E.Asaah Tetsuya Yokoyama Festus T.Aka Tomohiro Usui Mengnjo J.Wirmvem Boris Chako Tchamabe Takeshi Ohba Gregory Tanyileke J.V.Hell | 2015 | Geoscience Frontiers2015，6，4： | 3 |
| 2 | Phytochemical analysis,hepatoprotective and antioxidant activity of Alchornea cordifolia methanol leaf extract on carbon tetrachloride-induced hepatic damage in rats显示文摘Objective:To investigate the hepatoprotective and antioxidant activities of Alchornea cordifolia (A.cordifolia) leaf extract.Methods:Various solvent fractions of the methanol extract of the leaf of the plant.4.cordifolia Mull.Arg(Fam:Euphorbiaceae) were evaluated for hepatoprotective activity by carbon tetrachloride-induced liver damage in rats.The degree of protection was measured by using biochemical parameters such as serum glutamate oxalate transaminase(SGOT/ AST),serum glutamate pyruvate transaminase(SCPT/ALT),alkaline phosphatase(ALP) and total bilirubin.The in vitro antioxidant activity of the extract was also evaluated by the I,I-diphenyl 2-picrylhydrazyl(DPPH) free radical scavenging assay.The extract was subjected to preliminary phytoehemical screening.Results:The ethyl acetate and chloroform fractions,at a dose of 300 mg/kg,produced significant(P<0.05) hepatoprolection by decreasing the activities of the serum enzymes and bilirubin while there were marked scavenging of the DPPH free radicals by the fractions.The effects were comparable to those of the standard drugs used for the respective experiments,silymarin and ascorbic acid.Alkaloids,flavonoids,saponins and tannins were delected in the phylochemical screening.Conclusion:From this study,it was concluded that the plant of A.cordifolia possesses hepatoprotective as well as antioxidant activities and these activities reside mainly in the ethyl acetate and acetone fractions of methanol leaf extract. | Patience O Osadebe Festus BC Okoye Philip F Uzor Nneka R Nnamani Ijeoma E Adiele Nkemakonam C Obiano | 2012 | Asian Pacific Journal of Tropical Medicine2012，5，4： | 2 |
| 3 | Strength properties of corn cob ash concrete 显示文摘 | OLADIPUPO O S FESTUS O A | 2012 | J Emerg Trends Eng Appl Sci2012，3，： | 1 |
| 4 | Chronic subclinical in flammation as part of the insulin resistance syndrome显示文摘 | Festu A Agostino R Howard G | 2000 | Circulation2000，102，： | 1 |
| 5 | An exploration of reverse logistics practices in three companies显示文摘 | Xiaoming Li Festus Olorunniwo | | 0，，： | 1 |
| 6 | Chronic sub-clinical inflammation as part of the insulin resistance syndrome 显示文摘 | Festu A D' Agostino Rjr Howard G | 2000 | Circulation2000，102，： | 1 |
| 7 | Chronic subclinical in flammation as part of the insulin resistance syndrome显示文摘 | Festu A Agostino R Howard G | 2000 | Circulation2000，102，： | 1 |
| 8 | The Impact of Management and Employees on Cellular Manufacturing Implementation显示文摘 | Festus Olorunniwo Godwin Udo | 2002 | International Journal of Production Economics2002，76，1： | 1 |
| 9 | Calcium and phosphorus contents of body parts of some domestic animals used as meat source in Nigeria显示文摘Objective:To investigate the calcium and phosphorus contents of four domestic animals used as sources of meat in Nigeria.Methods:The calcium contents of the body parts of the animals were determined using atomic absorption spectrometer.Their phosphorus contents were determined colorimetrically using the molybdenum blue method.Results:The calcium and phosphorus contents were significantly higher in the bone samples than in the other animal parts investigated (P<0.05).The calcium contents of all the edible parts were higher in chicken than in the other animals.High calcium and phosphorus contents were detected in the faeces of chicken and goat, and that of cattle and goat,respectively.Low calcium and phosphorus contents were detected in the urine samples.Calcium:phosphorus ratios calculated for the bones of chicken,cattle and goat were satisfactory.Conclusions:In conclusion,calcium and phosphorus contents of the animal parts vary significantly and their relative contents may be related to the animal’s diet.Chicken parts may be the preferred dietary source of these minerals.This study highlights the need for routine investigation of the mineral contents of food,which is necessary for proper nutritional guidelines. | Edith U Ebeledike Godwin IC Nwokedi Okechukwu O Ndu Festus BC Okoye Izuchukwu S Ochiogu | 2010 | Asian Pacific Journal of Tropical Medicine2010，3，5： | 1 |
| 10 | A Sus-tainability Analysis of Namibian Marine Fishery显示文摘 | Twalinohamba AKAWA Festus Panduleni NASHIMA | | 0，，01： | 1 |
| 11 | Anti-viral activity of the extracts of a Kenyan medicinal plant Carissa edulis against herpes simplex virus显示文摘 | Festus MT Geoffrey M Rukungaa F | 2006 | Ethnopharmacology2006，104，1： | 1 |
| 12 | HIV Counseling and Testing of Pregnant Women in Sub-Saharan Africa: Experiences From a Study on Prevention of Mother-to-Child HIV-1 Transmission in Dar Es Salaam, Tanzania显示文摘 | Charles Kilewo Augustine Massawe Eligius Lyamuya Innocent Semali Festus Kalokola Ernest Urassa Maryrose Giattas Florence Temu Katarina Karlsson Fred Mhalu Gunnel Biberfeld | 2001 | JAIDS Journal of Acquired Immune Deficiency Syndromes2001，，5： | 1 |
| 13 | Service quality, customer satisfaction, and behavioral intentions in the service factory显示文摘 | Festus Olorunniwo | 2006 | Journal of Services Marketing2006，20，1： | 1 |
| 14 | Thermodynamic study of the removal of heavy metal ions from heavy oils using tetramethyl ammonium hydroxide pentahydrate ionic liquid显示文摘This study investigated efficiency of tetramethyl ammonium hydroxide pentahydrate(TMAH)in removal of heavy metal ions from heavy oils obtained from Nigerian oil sands by Soxhlet-extraction technique.Metals were removed from the heavy oils at variable temperatures using TMAH.Elemental analysis was done using Atomic absorption spectrophotometry(AAS).Percentage recovery was≥92.85%,confirming reliability of results.Total metal concentrations followed order:Ni>Pb>Mn>Cu>Cr>Cd.Analysis of variance results showed that F | Festus M.Adebiyi Reuben O.Yoade | 2022 | Petroleum Research2022，7，4： | 0 |
| 15 | Profiling the effects of microwave-assisted and soxhlet extraction techniques on the physicochemical attributes of Moringa oleifera seed oil and proteins显示文摘There is a constant search for biomaterials from natural products like plants for food and industrial applications.The work embodied in this report aimed at investigating the effects of microwave-assisted and soxhlet extraction(MAE and SE) techniques on the functional physicochemical quality characteristics of Moringa oleifera seed oil and proteins extracts. M. oleifera seeds were ground to fine powders and oil was extracted by microwave-assisted and soxhlet extraction techniques using petroleum ether. Quality attributes including yield percent, moisture content,iodine, saponification, specific gravity, viscosity, p H, thiobarbituric acid, acid and peroxide values were measured. Mineral and vitamin contents, chemical/functional groups, fatty acid(FA) composition, and reducing power of the oil were evaluated. Metabolomics of protein extracted from the defatted powders were analyzed by nuclear magnetic resonance(NMR). M. oleifera oil from MAE and SE methods had good yield(34.25 ± 0.0%,28.75 ± 0.0%), low moisture content(0.008 ± 0.0%, 0.011 ± 0.0%), non-drying and unsaturated, moderately saponified, less dense(0.91 ± 0.01, 0.92 ± 0.02 g m L^(-1)), had Newtonian flow, were weakly acidic, showed good content of FAs, recorded strong potential for long shelf-life, showed stability against oxidative rancidity and enzymatic hydrolysis, had very rich deposits of micro-and macro-nutrients as well as water-soluble and lipidsoluble vitamins, and functional groups in the oil were reflective of its content of long-and medium-chain triglycerides(LCT and MCT). Monounsaturated and saturated fatty acids(MUFA and SFA) were detected and the oil has excellent ferric ion reducing power. NMR metabolomic assay revealed the presence of nine essential amino acids(EAAs) in the protein extract. MAE technique is a feasible and acceptable alternative for high throughput extraction of M. oleifera oil with high yield and excellent quality attributes. The study revealed that MAE did not impart any remarkable advantage(s) on the physicochemical properties of M. oleifera seed oil and protein compared to SE technique. | Ngozi Maryann Nebolisa Chukwuebuka Emmanuel Umeyor Uchenna Eunice Ekpunobi Immaculeta Chikamnele Umeyor Festus Basden Okoye | 2023 | Oil Crop Science2023，8，1： | 0 |
| 16 | Distribution, health and ecological risk assessments of trace elements in Nigerian oil sands显示文摘The Nigerian oil sands represent the largest oil sand deposit in Africa, yet there is little published information on the distribution and potential health and ecological risks of trace elements in the oil resource. In the present study, we investigated the distribution pattern of 18trace elements(including biophile and chalcophile elements) as well as the estimated risks associated with exposure to these elements. The results of the study indicated that Fe was the most abundant element, with a mean concentration of 22,131 mg/kg while Br had the lowest mean concentration of 48 mg/kg. The high occurrence of Fe and Ti suggested a possible occurrence of ilmenite(Fe TiO_(3)) in the oil sands. Source apportionment using positive matrix factorization showed that the possible sources of detected elements in the oil sands were geogenic, metal production, and crustal. The contamination factor, geo-accumulation index, modified degree of contamination, pollution load index, and Nemerow pollution index indicated that the oil sands are heavily polluted by the elements. Health risk assessment showed that children were relatively more susceptible to the potentially toxic elements in the oil sands principally via ingestion exposure route(HQ > 1E-04). Cancer risks from inhalation are unlikely due to CR < 1E-06 but ingestion and dermal contact pose severe risks(CR > 1E-04). The high concentrations of the elements pose serious threats due to the potential for atmospheric transport, bioaccessibility, and bioavailability. | Odunayo T.Ore Festus M.Adebiyi | 2024 | Acta Geochimica2024，43，1： | 0 |
| 17 | Toward a sustainable growth path in Arab economies:an extension of classical growth model显示文摘Background/Objectives:Many economies are on the trajectory of alternative growth drivers other than conventional capital and labor.Access to credit facilities is a pertinent indicator of economic growth.In line with the United Nations Sustainable Development Goals(UNSDGs-8)agenda,the national goal for sustainable development for most economies and Arab economies is no exception.Therefore,the current study adopts a traditional growth model by exploring the relationship between gross domestic product(GDP)per capita,credit for private sectors,ratio of exports,real GDP,and per labor force participants for selected Arab economies annually from 2001 to 2020.Research design:This study leverages the Fourier Kwiatkowski–Phillips–Schmidt–Shin(KPSS)unit root test and second-generation panel econometrics as estimation techniques,such as Westerlund and Edgerton panel cointegration test,and the use of two estimators,namely the augmented mean group(AMG)and common correlated error mean group(CCEMG),to obtain robust results.Findings:Empirical findings from Westerlund and Edgerton panel cointegration tests validate the long-run equilibrium relationship among the outlined variables.Further empirical results indicate that the share of exports is negatively significant with economic growth in countries such as Kuwait,Lebanon,Tunisia,and Jordan.Additionally,savings and labor force participation have a positive relationship with economic growth in individual countries such as Algeria and Bahrain.As per the panel,there is no significant relationship between labor force participation and economic growth.This indicates that the skilled labor force enhanced economic growth.Conclusions:These findings come with inherent far-reaching policy suggestions for economies and panels.Further details on country-specific policy actions are presented in the concluding section. | Amjad Taha Mucahit Aydin Taiwo Temitope Lasisi Festus Victor Bekun Narayan Sethi | 2023 | Financial Innovation2023，9，1： | 0 |
| 18 | The hits and misses of Namibia’s attempt to implement the Ecosystem Approach to Fisheries(EAF)Management显示文摘Ecosystem Approach to Fisheries(EAF)management is a concept aimed at the conservation and sustainable use of the entire ecosystem.While EAF is a noble approach,its implementation has been challenging.Although Namibia has committed to the implementation of EAF,only limited assessment has been done of Namibian fisheries management processes and instruments concerning EAF.A qualitative assesment was done to ascertain if the Namibian fisheries management processes and instruments conform to the EAF principles.Namibian fisheries management processes and instruments largely conform to the EAF principles,although there are notable areas needing improvements.The conformities were pronounced in the total allowable catch setting,rebuilding depleted stocks,minimizing bycatch,and fishing impact minimization.The polluter pays,and user pays principles were also applied.Areas that were found lacking in this study included setting the indicators for EAF and ecosystem integrity.The assessment also noted the absence of guidelines for the precautionary approach principle and a transparent policy for quota and right allocation processes.The strategies for managing transboundary fish species are also not formulated.Overall,this assessment showed the complexities and challenges that Namibia and other countries need to overcome to implement EAF successfully. | Johannes A.Iitembu Victoria N.Erasmus Uatjavi Uanivi Dietlinde Nakwaya Richard R.Horaeb Ester Nangolo Festus P.Nashima Theopolina K.Iita Osmund Mwandemele | 2021 | Ecosystem Health and Sustainability2021，7，1： | 0 |
| 19 | Studies on the mechanisms of anti-inflammatory activity of the extracts and fractions of Alchornea floribunda leaves显示文摘Objective:Alchornea floribunda leaves are widely used in ethnomedicinal management of inflammatory disorders. The present work is aimed at investigating this folkloric use.Methods:The anti-inflammatory effect of the leaf extracts and fractions was investigated in experimental animal models of acute and chronic inflammation. The possible mechanisms by which the two most active fractions,hexane(HE) and ethyl acetate(EF) exert their effects were also investigated.Results:The crude extract(200 mg/kg) showed moderate inhibition of egg albumen-induced edema in rats(%edema inhibition = 54.69) at 4 h.HE and EF showed very high activity(%edema inhibition of 81.25 and 67.19 respectively at 200 mg/kg) at 4h as compared to the control. Both fractions ameliorated arthritis induced by formaldehyde in rats.At 400 mg/kg,HE evofeed a significant irritation of gastric mucosa in rats.EF(200 mg/kg,p.o.) significantly inhibited leucocytes(%inhibition = 36.79) migration in vivo,but could not stabilize heat and hypotonicity-indueed lysis of human erythrocyte at 200 and 400μg/mL in vitro.Phytochemical investigation revealed the presence of terpenoids and steroids in HE and flavonoids,tannins and saponins in EF.Conclusion:These results suggest that the leaves of Alchornea floribunda possess anti-inflammatory activity in acute and chronic inflammation.The activity may derive from a combination of inhibition of prostaglandin synthesis and leucocytes migration.The phytochemical constituents detected in HE and EF may account for the anti-inflammatory activity. | Festus BC Okoye Patience O.Osadebe | 2009 | Asian Pacific Journal of Tropical Medicine2009，2，3： | 0 |
| 20 | Demographic Variables as Indices of Emotional Adjustment of Widows in Enugu State: Implication for a Suitable Life Adjustment显示文摘 | Omeje Joachim C. Festus A. Ugwu Eskay Michael | 2012 | Psychology Research2012，2，11： | 0 |
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