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Wyszukujesz frazę "2,4-dinitrophenylhydrazine" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Synthesis and Characterization of New Energetic Plasticizers: Benzoyl-terminated Poly(epichlorohydrin) Modified by Phenylhydrazine and its Derivatives
    Autorzy:
    Atabaki, Fariborz
    Bastam, Naser Noorollahy
    Hafizi-Atabak, Hamid Reza
    Radvar, Mehran
    Jahangiri, Shahrzad
    Powiązania:
    https://bibliotekanauki.pl/articles/1062998.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    poly(epichlorohydrin)
    PECH
    terminal nitrobenzoyl poly(epichlorohydrin-phenylhydrazine)
    terminal nitrobenzoyl poly(epichlorohydrin-4-nitrophenylhydrazine)
    terminal nitrobenzoyl oly(epichlorohydrin-2,4-dinitrophenylhydrazine)
    synthesis
    properties
    Opis:
    Nitrobenzoyl-terminated poly(epichlorohydrin) (NB-PECH) was synthesized through the reaction of poly(epichlorohydrin) (PECH) with 3-nitrobenzoyl chloride. The NB-PECH was then modified by reaction with phenylhydrazine, 4-nitrophenylhydrazine and 2,4-dinitrophenylhydrazine, and these derivatives were evaluated as plasticizers. Poly(epichlorohydrin), poly(epichlorohydrin) with terminal 3-nitrobenzoyl groups (NB-PECH), terminal nitrobenzoyl poly(epichlorohydrin-phenylhydrazine) (NB-PECH-PH), terminal nitrobenzoyl poly(epichlorohydrin-4-nitrophenylhydrazine) (NB-PECH-4-NPH) and terminal nitrobenzoyl poly(epichlorohydrin-2,4-dinitrophenylhydrazine) (NB-PECH-2,4-DNPH) were examined by Ultraviolet-Visible spectroscopy (UV-VIS), Fourier Transform Infrared spectroscopy (FT-IR), Proton Nuclear Magnetic Resonance (1H NMR) spectrometry, elemental analysis of carbon, hydrogen and nitrogen (CHN) an Thermal Analysis methods: Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). In the TGA examination, the highest thermal stability was exhibited by NB-PECH. The glass transition temperature for the potential plasticizers was determined from their DSC curves. The DSC tests indicated that the highest energy of the plasticizers was exhibited by NB-PECH-2,4-DNPH containing two nitro groups. In addition, by comparing the thermograms of the samples heated with poly(tetrahydrofuran) the energy content of the NB-PECH-PH, NB-PECH-4-NPH and NB-PECH-2,4-DNPH plasticizers was clearly demonstrated.
    Źródło:
    Central European Journal of Energetic Materials; 2020, 17, 3; 323-343
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applicability of 2,4-dinitrophenylhydrazine (DNPH) method of protein oxidative damage measurement in the seminal plasma of canine (Canis lupus familiaris) and stallion (Equus caballus)
    Autorzy:
    Mogielnicka-Brzozowska, M.
    Woźniak, M.J.
    Cichowska, A.W.
    Fraser, L.
    Kraziński, B.
    Strzezek, R.
    Zielińska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/16647556.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    2,4-dinitrophenylhydrazine
    canine
    protein carbonylation
    seminal plasma
    stallion
    Opis:
    Seminal plasma (SP) proteins are responsible for sperm functional quality. Developing a reliable method to determine the degree of oxidative damage of these proteins is important for establishing semen fertilizing ability. The main aim of the study was to verify the applicability of protein carbonyl derivatives measurement in the SP of canine and stallion, using a method with 2,4-dinitrophenylhydrazine (DNPH). The research material consisted of ejaculates obtained from eight English Springer Spaniels, and from seven half-blood stallions during the breeding and non-breeding season. The content of carbonyl groups in the SP was measured on the basis of the reactions with DNPH. The following reagent variants were used to dissolve protein precipitates: Variant 1 (V1) – 6M Guanidine solution and Variant 2 (V2) – 0.1M NaOH solution. It has been shown that to obtain reliable results for the measurement of protein carbonylated groups in the dog and horse SP, both 6M Guanidine and 0.1M NaOH may be used. A correlation was also found between the number of carbonyl groups and the total protein content in the canine (V1: r = -0.724; V2: r = -0.847) and stallion (V1: r = -0.336; V2: r = -0.334) SP. Additionally, the study showed a higher content (p≤0.05) of protein carbonyl groups in the stallion SP in the non-breeding season compared to the breeding season. The method based on the reaction with DNPH, due to its simplicity and cost effectiveness, appears to be suitable for large-scale application in the determination of the SP proteins oxidative damage in dog and horse semen.
    Źródło:
    Polish Journal of Veterinary Sciences; 2023, 26, 2; 177-184
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In-house validation method for quantification of formaldehyde in silage and feedingstuffs with the use HPLC-DAD technique
    Autorzy:
    Patyra, E.
    Kwiatek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087267.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    formaldehyde
    feed
    silage
    2,4,-dinitrophenylhydrazine
    validation
    HPLC-DA
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 4; 553-561
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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