Biosoftening of coir fiber using selected microorganisms.
Identifieur interne : 000851 ( Main/Exploration ); précédent : 000850; suivant : 000852Biosoftening of coir fiber using selected microorganisms.
Auteurs : Akhila Rajan [Inde] ; Resmi C. Senan ; C. Pavithran ; T Emilia AbrahamSource :
- Bioprocess and biosystems engineering [ 1615-7591 ] ; 2005.
Descripteurs français
- KwdFr :
- MESH :
- composition chimique : Cocos, Noix.
- croissance et développement : Phanerochaete, Pseudomonas putida.
- ultrastructure : Cocos, Noix, Phanerochaete, Pseudomonas putida.
English descriptors
- KwdEn :
- MESH :
- chemistry : Cocos, Nuts.
- growth & development : Phanerochaete, Pseudomonas putida.
- ultrastructure : Cocos, Nuts, Phanerochaete, Pseudomonas putida.
Abstract
Coir fiber belongs to the group of hard structural fibers obtained from coconut husk. As lignin is the main constituent of coir responsible for its stiffness, microbes that selectively remove lignin without loss of appreciable amounts of cellulose are extremely attractive in biosoftening. Five isolated strains were compared with known strains of bacteria and fungi. The raw fiber treated with Pseudomonas putida and Phanerocheate chrysosporium produced better softened fiber at 30+/-2 degrees C and neutral pH. FeSO4 and humic acid were found to be the best inducers for P. chrysosporium and P. putida, respectively, while sucrose and dextrose were the best C-sources for both. Biosoftening of unretted coir fibers was more advantageous than the retted fibers. Unlike the weak chemically softened fiber, microbial treatment produced soft, whiter fibers having better tensile strength and elongation (44.6-44.8%) properties. Scanning electron microscopy photos showed the mycelia penetrating the pores of the fiber, removing the tylose plug and degrading lignin.
DOI: 10.1007/s00449-005-0023-2
PubMed: 16220267
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<author><name sortKey="Rajan, Akhila" sort="Rajan, Akhila" uniqKey="Rajan A" first="Akhila" last="Rajan">Akhila Rajan</name>
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<author><name sortKey="Senan, Resmi C" sort="Senan, Resmi C" uniqKey="Senan R" first="Resmi C" last="Senan">Resmi C. Senan</name>
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<author><name sortKey="Pavithran, C" sort="Pavithran, C" uniqKey="Pavithran C" first="C" last="Pavithran">C. Pavithran</name>
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<author><name sortKey="Abraham, T Emilia" sort="Abraham, T Emilia" uniqKey="Abraham T" first="T Emilia" last="Abraham">T Emilia Abraham</name>
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<term>Nuts (ultrastructure)</term>
<term>Phanerochaete (growth & development)</term>
<term>Phanerochaete (ultrastructure)</term>
<term>Pseudomonas putida (growth & development)</term>
<term>Pseudomonas putida (ultrastructure)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Cocos (composition chimique)</term>
<term>Cocos (ultrastructure)</term>
<term>Noix (composition chimique)</term>
<term>Noix (ultrastructure)</term>
<term>Phanerochaete (croissance et développement)</term>
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<term>Pseudomonas putida (croissance et développement)</term>
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<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Cocos</term>
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<term>Noix</term>
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<term>Pseudomonas putida</term>
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<keywords scheme="MESH" qualifier="ultrastructure" xml:lang="fr"><term>Cocos</term>
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<front><div type="abstract" xml:lang="en">Coir fiber belongs to the group of hard structural fibers obtained from coconut husk. As lignin is the main constituent of coir responsible for its stiffness, microbes that selectively remove lignin without loss of appreciable amounts of cellulose are extremely attractive in biosoftening. Five isolated strains were compared with known strains of bacteria and fungi. The raw fiber treated with Pseudomonas putida and Phanerocheate chrysosporium produced better softened fiber at 30+/-2 degrees C and neutral pH. FeSO4 and humic acid were found to be the best inducers for P. chrysosporium and P. putida, respectively, while sucrose and dextrose were the best C-sources for both. Biosoftening of unretted coir fibers was more advantageous than the retted fibers. Unlike the weak chemically softened fiber, microbial treatment produced soft, whiter fibers having better tensile strength and elongation (44.6-44.8%) properties. Scanning electron microscopy photos showed the mycelia penetrating the pores of the fiber, removing the tylose plug and degrading lignin.</div>
</front>
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<Abstract><AbstractText>Coir fiber belongs to the group of hard structural fibers obtained from coconut husk. As lignin is the main constituent of coir responsible for its stiffness, microbes that selectively remove lignin without loss of appreciable amounts of cellulose are extremely attractive in biosoftening. Five isolated strains were compared with known strains of bacteria and fungi. The raw fiber treated with Pseudomonas putida and Phanerocheate chrysosporium produced better softened fiber at 30+/-2 degrees C and neutral pH. FeSO4 and humic acid were found to be the best inducers for P. chrysosporium and P. putida, respectively, while sucrose and dextrose were the best C-sources for both. Biosoftening of unretted coir fibers was more advantageous than the retted fibers. Unlike the weak chemically softened fiber, microbial treatment produced soft, whiter fibers having better tensile strength and elongation (44.6-44.8%) properties. Scanning electron microscopy photos showed the mycelia penetrating the pores of the fiber, removing the tylose plug and degrading lignin.</AbstractText>
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<MeshHeading><DescriptorName UI="D009754" MajorTopicYN="N">Nuts</DescriptorName>
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