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Wyszukujesz frazę "Luffa cylindrica" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Improving Sound Absorption Property of Polyurethane Foams by Adding Tea-Leaf Fibers
    Autorzy:
    Ekici, B.
    Kentli, A.
    Kücük, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/176664.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fibers
    polymer-matrix composites
    sound absorption
    tea-leaf
    luffa-cylindrica
    Opis:
    The sound absorption property of polyurethane (PU) foams loaded with natural tea-leaf fibers and luffa cylindrica (LC) has been studied. The results show a significant improvement in the sound absorption property parallel to an increase in the amount of tea-leaf fibers (TLF). Using luffa-cylindrica as a filler material improves sound absorption properties of soft foam at all frequency ranges. Moreover, an increase in the thickness of the sample resulted in an improvement of the sound absorption property. It is pleasing to see that adding tea-leaf fibers and luffa-cylindrica to the polyurethane foam demonstrate a significant contribution to sound absorption properties of the material and it encourages using environmental friendly products as sound absorption material in further studies.
    Źródło:
    Archives of Acoustics; 2012, 37, 4; 515-520
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First report of powdery mildew caused by Podosphaera xanthii on Luffa cylindrica in Egypt and its control
    Autorzy:
    Elgamal, N.G.
    Khalil, M.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082755.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biocompost
    biocontrol
    essential oil
    Luffa cylindrica
    Podosphaera xanthii
    powdery mildew
    Opis:
    Luffa cylindrica M. Roem, is commonly called sponge gourd or Egyptian cucumber. In September 2018, several plants showing symptoms of powdery mildew were observed in some fields at different locations in Egypt. Identification and pathogenicity tests indicated that the causal fungus of powdery mildew disease of luffa cylindrica was Podosphaera xan thii. Results of surveyed luffa plants grown at different field localities of northern Egypt, for powdery mildew disease incidence revealed that the maximum record (57.33%) of dis- ease occurrence was recorded in some fields belonging to Beheira governorate followed by, Alexandria and Sharqia (53.67% and 48.00%, respectively). Meanwhile, fewer occurrences were observed in Kafer El-Sheekh governorate (45.33%). We applied biocontrol agents as a foliar spray against powdery mildew in vitro and under field conditions. The effects of some essential oils, organic acid and bioproducts were also studied. All treatments sig- nificantly reduced P. xanthii compared to untreated plants. Chaetomium globosum and Sac charomyces cerevisiae alone or grown on rice straw and/or bagas showed highly reduced disease incidence compared to the other treatment. From the present study it could be suggested that the usage of biocontrol formulated on rice straw might be used as an easily applied, safe and cost effective control method against powdery mildew diseases.
    Źródło:
    Journal of Plant Protection Research; 2020, 60, 3; 311-319
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency evaluation of Luffa cylindrica and Mucuna sloanei seeds in dye removal: A news approach
    Autorzy:
    Nnaji, P. C.
    Okoye, C. C.
    Umeuzuegbu, J. U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031647.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Luffa cylindrica
    Mucuna sloanei
    coag-flocculation rate constant
    critical coag-flocculation rate constant
    dye-based wastewater
    Opis:
    The use of Luffa cylindrica (LC) and Mucuna sloanei (MS) seeds as coagulants in the removal of dye by coag-flocculation was evaluated using a new approach. The approach uses the coag-flocculation rate constant K11, calculated using experimental data obtained while using LC and MS as coagulants in coag-flocculation process as a valid indicator to determine the optimum condition. The research also applied criterion for critical coag-flocculation rate constant Kc to satisfy World Health Organization’s minimum allowable level of suspended substance for wastewater discharge. In the criterion K11 ≥ Kc indicates better performance. The results indicated that K11 of 0.00214 L/mg·min for LC and 0.00208 L/mg·min for MS surpassed 0.00016 L/mg·min Kc value. This was observed for LC and MS at pH 2, but 1400 mg/L and 1200 mg/L, respectively. From the above, in accordance with the WHO guideline, the dosage of both coagulants meets the requirement. The solution pH could not meet the standard. Nonetheless, MS satisfied the requirement at pH 6, for dosage and pH. These results correspond to what was obtained experimentally. Therefore, in coag-flocculation kinetic modeling, this novel approach can be considered to track the efficiency of these sensitive factors in water treatment plants to meet the effluent quality requirements.
    Źródło:
    World Scientific News; 2020, 146; 184-201
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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