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    Wyświetlanie 1-4 z 4
    Tytuł:
    Biodiesel from coconut acid oil using Candida rugosa and Candida antarctica lipases
    Autorzy:
    Nandi, Sumit
    Bhattacharyya, Rupa
    Powiązania:
    https://bibliotekanauki.pl/articles/1031280.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bioesterification
    Biohydrolysis
    Candida Antarctica
    Candida rugosa
    Coconut acid oil
    Opis:
    Coconut acid oil (CAO) is a byproduct from the processing of coconut oil. CAO has a tremendous potential in the preparation of alternative fuel as biodiesel. In the present research investigation, CAO has been utilized for the preparation of biodiesel using Lipase AY Amano 30 (Candida rugosa) and Novozyme 40013 (Candida antarctica) in the presence of methanol using hexane as solvent. Initially, Lipase AY Amano 30 has been used for the biohydrolysis of neutral glycerides present in CAO, under the influence of water at 400C. Henceforth, the hydrolysed CAO was bioesterified with methanol in the presence of non-specific immobilized enzyme NS 40013 for the production of alternative fuel. The characteristics of CAO biodiesel (CAOB) was compared with diesel fuel and good outcome has been revealed. So cheap raw materials like CAO has been selectively utilized for the production of alternative fuel through a novel technology which may be useful for the partial replacement of present non-renewable fuels.
    Źródło:
    World News of Natural Sciences; 2021, 34; 72-81
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neem (Azadirachta indica A. Juss.) oil: A source of alternative fuel through enzyme technology
    Autorzy:
    Nandi, Sumit
    Bhattacharyya, Rupa
    Mitra, Swarnendu
    Powiązania:
    https://bibliotekanauki.pl/articles/1193346.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Azadirachta indica
    Candida antarctica
    Crude Neem oil
    diacylglycerol
    monoacylglycerol
    triacylglycerol
    Opis:
    Production of alternative energy sources from eco-friendly raw materials is supposed to be the most challenging job among researchers and academicians in the present world. Biodiesel has been considered as most useful green energy sources which is produced from Crude Neem (Azadirachta indica) oil (CNO) in the present study. The main advantages of CNO is that it is non-edible and is obtained abundantly in nature from neem seed. Initially, after bleaching of CNO, it is transesterified with methanol in the presence of non-specific enzyme catalyst Novozyme 40013 (Candida antarctica) maintaining certain reaction conditions. The parameters of the transesterification reaction have been identified as 8:1 molar ratio of methanol to CNO, 60 °C temperature in the presence of 6% enzyme Novozyme 40013 and 600 rpm of mixing intensity for 9 hrs of reaction duration. The product obtained, after completion of reaction, has been estimated of 91.24% biodiesel along with minor amounts of triacylglycerol (TAG), diacylglycerol (DAG) and monoacylglycerol (MAG). Finally, the physico-chemical properties of CNO biodiesel have been analysed and it showed good conformity with diesel fuel and biodiesel standard.
    Źródło:
    World Scientific News; 2021, 154; 76-88
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystal and molecular structure of hexagonal form of lipase B from Candida antarctica
    Autorzy:
    Strzelczyk, Paweł
    Bujacz, Grzegorz
    Kiełbasiński, Piotr
    Błaszczyk, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/1038848.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    CAL-B
    lipase B
    Candida antarctica
    apo form
    crystallographic polymorphism
    macromolecular crystallography
    Opis:
    During crystallization screenings of commercially available hydrolytic enzymes, the new, hexagonal crystal form of CAL-B, has been discovered and hereby reported. The NAG molecules, which were closing the glycosylation site in the orthorhombic form, in hexagonal structure make the glycosylation site open. It is unknown whether the opening and closing of the glycosylation site by the 'lid' NAG molecules, could be related to the opening and closing of the active center of the enzyme upon substrate binding and product release.
    Źródło:
    Acta Biochimica Polonica; 2016, 63, 1; 103-109
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practical highly enantioselective synthesis of (R)- and (S)-(E)-4-hydroxynon-2-enal
    Autorzy:
    Komisarski, Marek
    Kaczmarska, Zuzanna
    Kuśmierek, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/1040657.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    asymmetric synthesis
    4-HNE enantiomers
    (E)-4-hydroxynon-2-enal (4-HNE) synthesis
    lipid peroxidation
    Candida antarctica lipase
    Opis:
    Oxidative stress enhances lipid peroxidation (LPO) implicated in cancer promotion and progression. (E)-4-Hydroxynon-2-enal 1 (trans-4-hydroxy-2-nonenal, HNE) is one of the most abundant products of LPO. Reactions of HNE with DNA and proteins are responsible for its mutagenic and toxic effects. On the other hand, HNE is regarded as a key molecule in stress mediated cell cycle signaling. LPO generates racemic HNE (rac-1); however, it is expected that the individual enantiomers will behave differently in their interactions with cell components. The study of HNE stereochemistry in its chemical and biochemical interactions is hindered by the lack of expedient methods for preparation of pure enantiomers. This study presents one step synthesis of HNE in a cross-metathesis reaction between the commercially available oct-1-en-3-ol and acrolein in the presence of 2nd generation Grubbs catalyst. The use in the metathesis reaction of enantiomers of oct-1-en-3-ol obtained via Candida antarctica lipase resolution of the racemate allowed us to prepare of 4-(R)- and 4-(S)-enantiomers of HNE (R-1 and S-1, respectively) with excellent optical purity (97.5 and 98.4% ee, respectively) and good chemical yields (70%).
    Źródło:
    Acta Biochimica Polonica; 2009, 56, 1; 189-193
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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