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Wyszukujesz frazę "Gouda, M. A." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    LiOO.H2O as a catalyst for Knoevenagel and Gewald reactions
    Autorzy:
    Gouda, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778071.pdf
    Data publikacji:
    2010
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Malononitryl
    Cykloheksan
    Cyclohexanone
    LiOO.H2O
    reakcja Knoevenagel
    reakcja Gewalda
    Malononitrile
    Ethylcyanoacetate
    cyclohexanone
    Knoevenagel reaction
    Gewald reaction
    Opis:
    Commercial available lithium hydroxide monohydrate LiOH.H 2O was found to be a novel 'dual activation' catalyst for tandem cross Knoevenagel condensation between malononitrile or ethylcyanoacetate and aromatic aldehydes leading to an efficient and easy synthesis of the corresponding arylidenes at room temperature in a short reaction time. In the case of salicyaldehyde the reaction lead to the formation of 3-substituted coumarins. The high efficacy, cheapness and easy availability of LiOH.H2O prompted us to investigate its validity as a basic catalyst for Gewald reaction.
    Źródło:
    Polish Journal of Chemical Technology; 2010, 12, 4; 31-35
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An investigation on using the falling mass technique for dynamic force calibrations
    Autorzy:
    Gelany, Shaker A.
    Mahmoud, Gouda M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849008.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calibration
    dynamic calibration
    impact force
    falling weight
    Opis:
    In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 455-463
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An investigation on using the falling mass technique for dynamic force calibrations
    Autorzy:
    Gelany, Shaker A.
    Mahmoud, Gouda M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849097.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calibration
    dynamic calibration
    impact force
    falling weight
    Opis:
    In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 455-463
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An investigation on using the falling mass technique for dynamic force calibrations
    Autorzy:
    Gelany, Shaker A.
    Mahmoud, Gouda M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849140.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calibration
    dynamic calibration
    impact force
    falling weight
    Opis:
    In this paper, we present an experimental setup developed for the calibration of dynamic force transducers which is based on the drop mass method. The traceability to SI units is realized through well-known mass characteristics and a reference shock accelerometer attached to that mass. Two approaches are proposed to analyse dynamic force employing a drop mass system. One approach depends on the inertial force of a falling mass while the other deals with the work-energy principle. Results of both approaches are then compared to the response of a statically calibrated force transducer. It is shown that the obtained maximum relative deviations between the response of force transducer and the first approach results are 1% while those of the second approach are 2%.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 455-463
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design, Synthesis and Biological Evaluation of Novel Benzo[4,5]thiazolo[2,3-c][1,2,4]triazole Derivatives as Potential Anticancer Agents
    Autorzy:
    Abdelazeem, Ahmed H.
    Gouda, Ahmed M.
    Omar, Hany A.
    Alrobaian, Majed
    Powiązania:
    https://bibliotekanauki.pl/articles/895393.pdf
    Data publikacji:
    2018-06-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    apoptosis
    anticancer
    S-benzothiazolotriazole
    Kinase
    caspase3/7
    Opis:
    In the present study, we have designed and synthesized a novel series of benzothiazolotriazole derivatives as potential anticancer agents. The anticancer activity of the newly synthesized compounds was evaluated against three cancerous cell lines; A549 (human lung adenocarcinoma), MCF-7 (human breast carcinoma) and Hep3B (human hepatocellular carcinoma) using MTT assay. Among this series, compounds 15 and 16 showed the most promising anticancer activity with IC50 values between 11.1 to 21.5 μM. Kinase profiling was performed for the most potent compounds 15 and 16 and it revealed weak inhibitory activity against 10 various kinases, where the highest inhibition was against CDK2/Cyclin A1 by compound 15. Furthermore, caspase-3/7 assay also indicated that the same compound 15 has the ability to induce apoptosis through the activation of effector caspase-3/7 family. Therefore, it could be deduced that the S-benzo[4,5]thiazolo[2,3-c][1,2,4]triazole is a promising novel anticancer scaffold with antiproliferative and apoptosis-inducing activities deserves to be taken up as a lead for further structural optimization.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 3
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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