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Wyszukujesz frazę "chitin deacetylase" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Kinetics of thermal deactivation of chitin deacetylase
Autorzy:
Jaworska, Małgorzata M.
Powiązania:
https://bibliotekanauki.pl/articles/1035494.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
activity
chitin deacetylase
chitosan
thermal deactivation
Opis:
In the paper the thermal deactivation of chitin deacetylase separated from Absidia orchidis vel coerulea was investigated. Experiments were carried out at a temperature of 50ºC up to 24 hours. Three mechanisms of deactivation were tested: irreversible first-order, reversible firstorder, and three-parameters phenomenological model. It was found that the last one gave the best approximation of the deactivation process. The parameters of the model were evaluated and the model was also confirmed by independent experiments.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 197-204
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation, molecular cloning and characterisation of two genes coding chitin deacetylase from mucor circinelloides ibt-83
Autorzy:
Kaczmarek, Michał
Struszczyk-Świta, Katarzyna
Florczak, Tomasz
Szczęsna-Antczak, Mirosława
Antczak, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/1034731.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitin deacetylase
genes
molecular cloning
sequences analysis
Opis:
Chitosan is a linear N-deacetylated derivative of chitin, soluble in acetic solutions. The deacetylation of chitin can be achieved enzymatically using chitin deacetylase (ChDa) (EC 3.5.1.41), which hydrolyses the N-acetamido groups of N-acetyl-D-glucosamine residues in chitin and chitosan. Complementary DNA (cDNA), which encodes ChDa, was isolated from M. rouxii s well as other fungi. Chitin deacetylase activity was detected in partially purified and concentrated crude extract of the protein from Mucor circinelloides IBT-83. Additionally, two open reading frames (ORF), putatively encoding ChDa, were identified and amplified from cDNA of this strain. Each ORF was molecularly cloned and sequenced. Amino acid sequences of ChDaI and ChDaII were predicted, using nucleotide sequences of these cDNA clones, and analysed by means of bioinformatics tools.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 93-103
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of chitin structure on its enzymatic deacetylation
Autorzy:
Jaworska, M.
Roberts, G.A.F.
Powiązania:
https://bibliotekanauki.pl/articles/952676.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chitin
chitin deacetylase
enzymatic deacetylation
structure
crystallinity
conformation
chityna
krystaliczności
struktura
Opis:
The possibility of producing chitosan by enzymatic deacetylation of chitin has been the subject of numerous investigations over the last twenty years, but to date no satisfactory method has been developed. In this paper the influence of chitin chain conformation and chitin particle crystallinity on the enzymatic deacetylation of chitin is investigated to determine the relative importance of these two factors on the process. It is shown that the high crystallinity of chitin is the main obstacle to converting chitin to chitosan by enzymatic deacetylation.
Źródło:
Chemical and Process Engineering; 2016, 37, 2; 261-267
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelowanie bioreaktora okresowego do enzymatycznej deacetylacji chitozanu
Batch reactor for enzymatic deacetylation of chitosan
Autorzy:
Jaworska, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/2070411.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
deacetylaza chitynowa
chitozan
reaktor okresowy
chitin deacetylase
chitosan
batch reactor
Źródło:
Inżynieria i Aparatura Chemiczna; 2009, 3; 53-54
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of selected ionic liquids on activity of chitin deacetylase
Autorzy:
Aspras, I.
Kamińska, M.
Karzyński, K.
Kawka, M.
Jaworska, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/185154.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
chitin deacetylase
enzyme activity
imidasolium ionic liquids
pyridinium ionic liquids
aktywność enzymu
ciecze jonowe
Opis:
Chitin deacetylase is the only known enzyme which is able to deacetylate N-acetyl-D-glucosamine units in chitin or chitosan chains. As chitin can hardly be dissolved in organic/inorganic solvents, new solvents are still searched. Ionic liquids are promising for that application and for homophase enzymatic deacetylation. The aim of the work was to investigate the influence of selected ionic liquids on activity of chitin deacetylase. It has been shown that [Amim] ionic liquids increase the activity of chitin deacetylase. The highest activity was observed for [Amim][Cl]. Ionic liquids with shorter (ethyl (C2)) and longer side chain (buthyl (C4)) only insignificantly influenced the activity of the enzyme. All tested ionic liquids with [Br] anion increased the activity of chitin deacetylase while the [Emim] and [Bmim] cation in combination with [Cl] anion inhibited the activity of the enzyme.
Źródło:
Chemical and Process Engineering; 2016, 37, 1; 77-82
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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