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Wyszukujesz frazę "Mohamed, A." wg kryterium: Autor

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Phenobarbital analysis in biological matrix (blood) by high performance liquid chromatography (HPLC)
    Autorzy:
    Hamza, O.
    Mohamed Moktar, B.
    Chohra Mostafa, B.
    Zeghdaoui, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412593.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Phenobarbital
    HPLC
    blood
    extraction
    biological matrix
    Opis:
    In this work, we have tried to contribute to the analysis of phenobarbital in the blood. To do this, we used different analytical techniques such as liquid chromatography (HPLC). The results obtained in the course of our work, we can conclude that: The HPLC method was separate phenobarbital endogenous blood components, and optimizing the conditions of chromatographic separation as the composition of the mobile phase consisting of 20 % acetonitrile + 20 % methanol + 60 % ammonium acetate buffer. The extraction with diethyl ether to pH = 4; The chromatographic column, microbondapack ZORBAX C18. A system of diode-array UV detection at 254 nm.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 1; 31-40
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic noses for monitoring benzene occupational exposure in biological samples of Egyptian workers
    Autorzy:
    Mohamed, Ehab I.
    Khalil, Gihane I.
    Abdel-Mageed, Samir M.
    Bayoumi, Amani M.
    Ramadan, Heba S.
    Kotb, Metwally A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2179801.pdf
    Data publikacji:
    2013-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    phenol
    muconic acid
    exhaled air
    blood
    urine
    principal component analysis
    Opis:
    Objectives: Benzene is commonly emitted in several industries, leading to widespread environmental and occupational exposure hazards. While less toxic solvents have been substituted for benzene, it is still a component of petroleum products and is a trace impurity in industrial products resulting in continued higher occupational exposures in industrial settings in developing countries. Materials and Methods: We investigated the potential use of an electronic nose (e-nose) to monitor the headspace volatiles in biological samples from benzene-exposed Egyptian workers and non-exposed controls. The study population comprised 150 non-smoking male workers exposed to benzene and an equal number of matching non-exposed controls. We determined biomarkers of benzene used to estimate exposure and risk including: benzene in exhaled air and blood; and its urinary metabolites such as phenol and muconic acid using gas chromatography technique and a portable e-nose. Results: The average benzene concentration measured in the ambient air of the workplace of all studied industrial settings in Alexandria, Egypt; was 97.56±88.12 μg/m³ (range: 4.69–260.86 μg/m³). Levels of phenol and muconic acid were signifi cantly (p < 0.001) higher in both blood and urine of benzene-exposed workers as compared to non-exposed controls. Conclusions: The e-nose technology has successfully classifi ed and distinguished benzene-exposed workers from non-exposed controls for all measured samples of blood, urine and the exhaled air with a very high degree of precision. Thus, it will be a very useful tool for the low-cost mass screening and early detection of health hazards associated with the exposure to benzene in the industry.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 165-172
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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