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    Wyświetlanie 1-3 z 3
    Tytuł:
    Geometric Programming in the Design of Standard Laboratory for Students’ Practical Work
    Autorzy:
    Amuji, H. O.
    Olewuezi, N. P.
    Iwuji, J. C.
    Chijioke, I. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1046548.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Design height
    Design length
    Design width
    Geometric programming
    Optimal objective function
    Opis:
    In this paper, we applied Geometric programming in the design of a standard laboratory for students’ practical work in the Federal University of Technology Owerri. The laboratory has a capacity of 1,357 seats thereby containing 1357 students with the following dimensions: design length is 644.3m; design width is 337.8m and design height is 217.7m. The laboratory would cost the university authority a minimum of 915,875.2 naira to construct.
    Źródło:
    World Scientific News; 2019, 138, 2; 285-294
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Safety of honey consumed in Enugu State, Nigeria: a public health risk assessment of lead and polycyclic aromatic hydrocarbons
    Autorzy:
    Ozoani, H.A.
    Ezejiofor, A.N.
    Amadi, C.N.
    Chijioke-Nwauche, I.
    Orisakwe, O.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/874918.pdf
    Data publikacji:
    2020
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Opis:
    Background: Information about lead (Pb) and polycyclic aromatic hydrocarbons (PAHs) concentrations in honey and their dietary intake is very important in human health risk assessment. Currently, there are paucity of data on the risk assessment and concentrations of lead and PAHs in honey in Nigeria. Objective: This study has determined the potential human health risk of lead and PAHs associated with the consumption of honey in Enugu state, Nigeria. Materials and methods: Lead and US EPA 16 priority PAHs in honey harvested from rural and urban communities in March 2016 were determined using Atomic Absorption Spectrometer and Gas Chromatograph respectively. Carcinogenic and non-carcinogenic risk assessments were carried. Results: The mean concentration of Pb in honey ranged from 0.005 mg/kg – 0.08 mg/kg. The mean concentrations of 16 PAHs in honey ranged from 4.71E-03 – 2.72 mg/kg. The dietary intake of the PAHs for adults and children ranged from 0.0021 – 0.0259 mg/kg/day and 0.0011 – 0.0129 mg/kg/day respectively. The levels of BaPeq and their margin of exposure MOE suggest non-significant health risk. The incremental life cancer risk ILCR of Pb were within safe range of <1E-04. Conclusion: Consumption of honey from Enugu State, Nigeria may not pose a significant health risk.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2020, 71, 1
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water quality challenges and impact
    Autorzy:
    Obilonu, A.N.
    Chijioke, C.
    Igwegbe, W.E.
    Ibearugbulem, O.I.
    Abubakar, Y.F.
    Powiązania:
    https://bibliotekanauki.pl/articles/11787.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    water quality
    water body
    environment pollution
    prevention
    treatment
    challenge
    impact
    waste water
    acid rain
    fish
    sediment
    pollutant
    Opis:
    Man’s activities on the environment often results in pollution and degradation of water bodies. Water bodies must therefore be jealously guided and protected from being polluted, which will affect water quality and availability for desired usage. Causes of water quality impairment are urban and rural storm water runoff, inadequate waste water treatment, nutrient entrophication, atmospheric deposition and acid rain, pollutant in sediments and fish, and nuisance aquatic weed growth and invasive species. Other factors include unhygienic disposal and inadequate treatment of human and livestock wastes, indecent management and treatment of industrial residues, inappropriate agricultural practices and unsafe solid waste discharge. Suggested strategies to combat water quality problems which should form the basis of policy solution for improving water quality include: (i) prevention of pollution; (ii) treatment of polluted water; (iii) safe use of waste water; and (iv) restoration and protection of ecosystem. It is recommended that our water bodies and the environment in general should be protected through appropriate legislation guidelines and public literacy campaign and mass education to sensitize, educate and make the people a fully environmentally literate society. Taking these steps internationally, nationally and locally will mean better water quality for our present society and future generation.
    Źródło:
    International Letters of Natural Sciences; 2013, 04
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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