Biodegradation study on polycaprolactone with bimodal molecular weight distribution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F12%3APU99253" target="_blank" >RIV/00216305:26310/12:PU99253 - isvavai.cz</a>

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1002/app.38078/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/app.38078/abstract</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Biodegradation study on polycaprolactone with bimodal molecular weight distribution

Popis výsledku v původním jazyce

Polycaprolactone (PCL) of bimodal molecular weight distribution was exposed to the action of enzymes-lipases from Aspergillus oryzae in phosphate buffer at pH 7 and 37 degree Celsius, and those produced in situ by Bacillus subtilis in nutrient medium at30 degree Celsius for 42 days. The occurrence of biodegradation is proved on the basis of the weight loss, decrease of molecular weight, carbonyl index, crystallinity, and development of cracks on the PCL surfaces. In the case of Bacillus subtilis, the degradation (10 wt % loss of PCL) proceeds faster in comparison wit lipase from Aspergillus oryzae (2.6 wt % loss of PCL), where the degradation process seems to stop during 14 days of experiment. The gel permeation chromatography results reveal that preferential degradation of lower molecular portion did not occur but it is assumed that PCL chains were cleaved in accordance with particular degradation mechanism that depends significantly on biological agent.

Název v anglickém jazyce

Biodegradation study on polycaprolactone with bimodal molecular weight distribution

Popis výsledku anglicky

Polycaprolactone (PCL) of bimodal molecular weight distribution was exposed to the action of enzymes-lipases from Aspergillus oryzae in phosphate buffer at pH 7 and 37 degree Celsius, and those produced in situ by Bacillus subtilis in nutrient medium at30 degree Celsius for 42 days. The occurrence of biodegradation is proved on the basis of the weight loss, decrease of molecular weight, carbonyl index, crystallinity, and development of cracks on the PCL surfaces. In the case of Bacillus subtilis, the degradation (10 wt % loss of PCL) proceeds faster in comparison wit lipase from Aspergillus oryzae (2.6 wt % loss of PCL), where the degradation process seems to stop during 14 days of experiment. The gel permeation chromatography results reveal that preferential degradation of lower molecular portion did not occur but it is assumed that PCL chains were cleaved in accordance with particular degradation mechanism that depends significantly on biological agent.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Applied Polymer Sciences

ISSN

0021-8995

e-ISSN

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Svazek periodika

2012

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

465-475

Kód UT WoS článku

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EID výsledku v databázi Scopus

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