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Wyszukujesz frazę "fatty alcohol" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Biochemical characteristics of AtFAR2, a fatty acid reductase from Arabidopsis thaliana that reduces fatty acyl-CoA and -ACP substrates into fatty alcohols
Autorzy:
Doan, Thuy
Carlsson, Anders
Stymne, Sten
Hofvander, Per
Powiązania:
https://bibliotekanauki.pl/articles/1038782.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Arabidopsis thaliana
chloroplast
fatty acyl-CoA/ACP reductase
fatty alcohol
fatty aldehyde
Opis:
Fatty alcohols and derivatives are important for proper deposition of a functional pollen wall. Mutations in specific genes encoding fatty acid reductases (FAR) responsible for fatty alcohol production cause abnormal development of pollen. A disrupted AtFAR2 (MS2) gene in Arabidopsis thaliana results in pollen developing an abnormal exine layer and a reduced fertility phenotype. AtFAR2 has been shown to be targeted to chloroplasts and in a purified form to be specific for acyl-ACP substrates. Here, we present data on the in vitro and in planta characterizations of AtFAR2 from A. thaliana and show that this enzyme has the ability to use both, C16:0-ACP and C16:0-CoA, as substrates to produce C16:0-alcohol. Our results further show that AtFAR2 is highly similar in properties and substrate specificity to AtFAR6 for which in vitro data has been published, and which is also a chloroplast localized enzyme. This suggests that although AtFAR2 is the major enzyme responsible for exine layer functionality, AtFAR6 might provide functional redundancy to AtFAR2.
Źródło:
Acta Biochimica Polonica; 2016, 63, 3; 565-570
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Płuczka wiertnicza z dodatkiem pochodnych alkoholi tłuszczowych
Drilling mud with the addition of fatty alcohol derivatives
Autorzy:
Zima, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1834231.pdf
Data publikacji:
2020
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
płuczka wiertnicza
poliglikol
uszkodzenie
przepuszczalność
alkohol tłuszczowy
drilling mud
polyglycol
permeability
damage
fatty alcohol
Opis:
The article presents the results of research on the development of drilling muds containing derivatives of fatty alcohols, which will ensure that their optimal inhibitory properties in borehole conditions are achieved. In the mud compositions, alkoxy derivatives of fatty alcohols were used, which are non-ionic agents and their inhibitory properties have been confirmed in earlier studies. Drilling fluids were tested under HPHT conditions as well as under conditions of chemical contamination and increasing solids content. Due to the possibility of using muds containing new types of inhibitors to drill-in, studies on their effect on damage to reservoir rock permeability were also conducted. The use of a new type of inhibitor required the development of a methodology for controlling its content in the mud and a method for treating the mud during drilling. Previously used inhibitors of this type are polyglycols that are polymers of ethylene oxide or copolymers of ethylene oxide and propylene oxide differing in molecular weight. The main test confirming the inhibitory properties of scrubbers is the testing of clay rock dispersion, normally carried out under ambient conditions. This article describes dispersion studies under elevated temperature conditions to confirm the inhibitory properties of test agents under conditions similar to wellbore. Dispersion studies were additionally associated with swelling measurements, i.e. volumetric growth of clay rock in the drilling mud environment. Muds containing new types of polyglycols were also tested in borehole-like conditions: tests on the resistance of these muds to divalent metal ions (Ca2+ and Mg2+), solid phase contamination (ground Miocene shale imitating drill cuttings) and increased temperature. The subject matter presented in the article is the result of industry interest in the use of muds with the addition of this type of inhibitors. These agents have similar properties to the previously used polyglycols, but show greater efficiency under well conditions.
Źródło:
Nafta-Gaz; 2020, 76, 3; 162-174
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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