2006
DOI: 10.1590/s0101-20612006000200027
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Queratina de penas de frango: extração, caracterização e obtenção de filmes

Abstract: SUMMARYCHiCkEN fEatHER kERatiN: ExtRaCtioN, CHaRaCtERizatioN aND filMS PREPaRatioN. the objective of this study was to extract and to determine the average molecular weight, the amino acids profile, and the thermal stability of feather keratin and the basic properties of the obtained films. the extraction, carried out with an aqueous solution containing urea, 2-mercaptoethanol and surfactant (pH 9.0), allowed the extraction of 94% of the keratin presented in the dry feather. the keratin molecular weights were … Show more

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Cited by 12 publications
(7 citation statements)
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(33 reference statements)
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“…The feather is composed of about 90% of keratin, which has a structure characteristic of materials of high mechanical strength [2,3]. The keratin has α-helix and β-pleated sheet structure (Figure 3 20 amino acids, mainly of cysteine and its structure consists of a central carbon linked to functional groups (amine, -NH 2, and carboxylic acid, -COOH), the hydrogen atoms and the group R (sulfur) [4].…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…The feather is composed of about 90% of keratin, which has a structure characteristic of materials of high mechanical strength [2,3]. The keratin has α-helix and β-pleated sheet structure (Figure 3 20 amino acids, mainly of cysteine and its structure consists of a central carbon linked to functional groups (amine, -NH 2, and carboxylic acid, -COOH), the hydrogen atoms and the group R (sulfur) [4].…”
Section: Introductionmentioning
confidence: 99%
“…They possess high flexibility and are hydrophobic, where their structure has high-carbon content. In addition to all these features, it is fibrous, has good compressibility and resiliency, when used in textile products, films and composites [1,2]. Due the length of the chicken feathers, they cannot be processed in textile machinery; however, the feathers need of suitable process for the manufacture of yarns and cloths, in 100% form or mixed with other materials, whether natural or synthetics [1,3].…”
Section: Introductionmentioning
confidence: 99%
“…A queratina pertence a classe de proteínas fibrosas formada por pontes dissulfeto inter ou intramolecular, proporcionando um uma característica rígida e tenaz por causa da formação tridimensional das fibras de queratina que formam uma rede. Essa substância proteica dispõe de cadeias polipeptídicas fortemente aderidas entre si num arranjo paralelo (MOORE et al, 2006). A queratina possui cadeias proteicas compactadas na forma de estruturas conhecidas como alfa hélice ou folha beta pregueada, possuem um alto nível de enovelamento e apresentam ligações inter e intracadeia, a exemplo das ligações de dissulfeto, pontes de hidrogênio e interações hidrofóbicas, concedendo resistência à degradação proteolítica, insolubilidade e estabilidade (BRANDELLI, 2010).…”
Section: Queratinaunclassified
“…As penas representam 5 a 7% da massa dos frangos (Moore et al, 2005). Em 2011, Brasil tornou-se o maior exportador mundial dessas aves (AVEWORLD, 2012).…”
Section: Figura 1 -Evolução Do Abate De Frangos No Brasil Nos úLtimosunclassified
“…Essa estrutura é formada de alfa-aminoácidos, que são constituídos de uma estrutura helicoidal de materiais de alta resistência. Tem como estrutura um carbono central (carbono alfa) ligado a: grupos funcionais amina (NH 2 ) e ácido carboxílico (COOH); átomos de hidrogênio e alguns aminoácidos podem conter enxofre em sua estrutura (Moore et al, 2005;Campbell, 2006), Figura 2. Estrutura dos aminoácidos.…”
Section: Figura 1 -Evolução Do Abate De Frangos No Brasil Nos úLtimosunclassified