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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
03/09/2009 |
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Data da última atualização: |
27/10/2010 |
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Autoria: |
FICKERS, P.; DESTAIN, J.; THONART, P. |
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Afiliação: |
PATRICK FICKERS, Université de Liège; JACQUELINE DESTAIN, FUSAGX; PHILIPPE THONART, FUSAGX. |
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Título: |
Les lipases sont des hydrolases atypiques : principales caractéristiques et applications. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Biotechnologie, Agronomie Société et Environnement, Gembloux, v. 12, n. 2, p. 119-130, 2. trim. 2008. |
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Idioma: |
Francês |
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Conteúdo: |
Les triacylglycérol acyl-hydrolases, ou lipases, sont des enzymes atypiques de par leur mécanisme d'action et leur spécificité de substrats. En fonction du micro-environnement de l'enzyme, elles peuvent agir en tant qu'hydrolases en milieu aqueux ou comme catalyseurs en synthèse organique. En tant qu'hydrolases, elles sont responsables du catabolisme des triglycérides, leurs substrats préférentiels, en acide gras et en glycérol. Chez de nombreux êtres vivants, cette réaction est capitale de par son rôle physiologique majeur dans le métabolisme des graisses et des lipides. De plus, certaines lipases sont capables d'hydrolyser des phospholipides, des esters de cholestérol et même parfois certains esters synthétiques. En milieu solvant, elles peuvent catalyser bon nombre de réactions allant de l'estérification à l'acidolyse ou l'alcoolyse tout en présentant une certaine énantio-, régio- et chimio-sélectivité. Les lipases forment une classe d'enzymes hétérogènes de par leur origine, qu'elles soient animales, végétales ou microbiennes, ce qui augmente encore leurs potentialités. Toutes ces propriétés ont conduit au développement de nombreuses applications aussi bien au point de vue industriel, notamment dans l'industrie agro-alimentaire et dans l'industrie chimique, qu'en médecine humaine. |
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Palavras-Chave: |
Catalisador orgânico; Cinética de hidrólise; EC3.1.1.3; Enzimas atípicas; Especificidade das lipases; Esterificação; Propriedades físico-química das lipases; Triacilglicerol acil-hidrolases. |
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Thesagro: |
Hidrolase; Lípase. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02178naa a2200265 a 4500
001 1257624
005 2010-10-27
008 2008 bl uuuu u00u1 u #d
100 1 $aFICKERS, P.
245 $aLes lipases sont des hydrolases atypiques$bprincipales caractéristiques et applications.
260 $c2008
520 $aLes triacylglycérol acyl-hydrolases, ou lipases, sont des enzymes atypiques de par leur mécanisme d'action et leur spécificité de substrats. En fonction du micro-environnement de l'enzyme, elles peuvent agir en tant qu'hydrolases en milieu aqueux ou comme catalyseurs en synthèse organique. En tant qu'hydrolases, elles sont responsables du catabolisme des triglycérides, leurs substrats préférentiels, en acide gras et en glycérol. Chez de nombreux êtres vivants, cette réaction est capitale de par son rôle physiologique majeur dans le métabolisme des graisses et des lipides. De plus, certaines lipases sont capables d'hydrolyser des phospholipides, des esters de cholestérol et même parfois certains esters synthétiques. En milieu solvant, elles peuvent catalyser bon nombre de réactions allant de l'estérification à l'acidolyse ou l'alcoolyse tout en présentant une certaine énantio-, régio- et chimio-sélectivité. Les lipases forment une classe d'enzymes hétérogènes de par leur origine, qu'elles soient animales, végétales ou microbiennes, ce qui augmente encore leurs potentialités. Toutes ces propriétés ont conduit au développement de nombreuses applications aussi bien au point de vue industriel, notamment dans l'industrie agro-alimentaire et dans l'industrie chimique, qu'en médecine humaine.
650 $aHidrolase
650 $aLípase
653 $aCatalisador orgânico
653 $aCinética de hidrólise
653 $aEC3.1.1.3
653 $aEnzimas atípicas
653 $aEspecificidade das lipases
653 $aEsterificação
653 $aPropriedades físico-química das lipases
653 $aTriacilglicerol acil-hidrolases
700 1 $aDESTAIN, J.
700 1 $aTHONART, P.
773 $tBiotechnologie, Agronomie Société et Environnement, Gembloux$gv. 12, n. 2, p. 119-130, 2. trim. 2008.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
22/04/2020 |
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Data da última atualização: |
03/05/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CLARO, F. C.; JORDÃO, C.; VIVEIROS, B. M. de; ISAKA, L. J. E.; VILLANOVA JUNIOR, J. A.; MAGALHAES, W. L. E. |
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Afiliação: |
Francine Ceccon Claro, Doutoranda da UFPR; Caroline Jordão, Mestranda da UFPR; Bruno Massa de Viveiros, PUC-PR; Luciano Jose ?Eigio Isaka, PUC-PR; José Ademar Villanova Junior, PUC-PR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Low cost membrane of wood nanocellulose obtained by mechanical defibrillation for potential applications as wound dressing. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Cellulose, v. 7, p. 10765-10779, 2020. |
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DOI: |
https://doi.org/10.1007/s10570-020-03129-2 |
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Idioma: |
Inglês |
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Conteúdo: |
Large wounds are characterized by clini-cal and surgical challenges, requiring numeroussearches on demand for inexpensive biocompatiblematerials that produce the best quality of cutaneoushealing. Cellulose is a biopolymer of greatest abun-dance, good biocompatibility and wide applicationdue to its chemical and physical properties. This studywas aimed to develop and characterize low costmembranes of wood cellulose nanofibrils for potentialapplication as a wound dressing in comparison to acommercial porous regenerating membrane. An inex-pensive mechanical method was used to defibrillatecellulose, and later the membranes were obtained fromthe nanofibrils by filtering and drying under mildpressure. The techniques employed for characteriza-tion included scanning electron microscopy, physicaltesting, application in vivo and cost-effectivenessanalysis. The membranes presented promising phys-ical properties for application as cutaneous dressing,with characteristic translucency allowing the evalua-tion of the wound without the need of removal andexchange of the dressing. Wood nanocellulose dress-ing seems to be promising for wound care since itpresented good adhesion to the moist wound surfacesthus promoting the most efficient repitialization in thefirst 4 days. No allergic reaction or inflammatoryresponse to wood nanocellulose dressings wasobserved. The wood nanocellulose membranes standout as a potential wound dressing, as it shows similarefficacy of bacterial cellulose dressing. Besides theefficacy, the membrane developed in this studypresents a simpler, faster and cheaper manufacturingprocess, which may reduce the production cost by99% MenosLarge wounds are characterized by clini-cal and surgical challenges, requiring numeroussearches on demand for inexpensive biocompatiblematerials that produce the best quality of cutaneoushealing. Cellulose is a biopolymer of greatest abun-dance, good biocompatibility and wide applicationdue to its chemical and physical properties. This studywas aimed to develop and characterize low costmembranes of wood cellulose nanofibrils for potentialapplication as a wound dressing in comparison to acommercial porous regenerating membrane. An inex-pensive mechanical method was used to defibrillatecellulose, and later the membranes were obtained fromthe nanofibrils by filtering and drying under mildpressure. The techniques employed for characteriza-tion included scanning electron microscopy, physicaltesting, application in vivo and cost-effectivenessanalysis. The membranes presented promising phys-ical properties for application as cutaneous dressing,with characteristic translucency allowing the evalua-tion of the wound without the need of removal andexchange of the dressing. Wood nanocellulose dress-ing seems to be promising for wound care since itpresented good adhesion to the moist wound surfacesthus promoting the most efficient repitialization in thefirst 4 days. No allergic reaction or inflammatoryresponse to wood nanocellulose dressings wasobserved. The wood nanocellulose membranes standout as a potential wound dressing, as it shows similarefficacy of bacterial cellulose dressing. B... Mostrar Tudo |
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Palavras-Chave: |
Biocompatible; Cost-effectiveness; Healing; Nanofiber; Nanofibra; Nanomaterial. |
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Thesaurus NAL: |
Nanomaterials. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02500naa a2200277 a 4500
001 2121763
005 2024-05-03
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10570-020-03129-2$2DOI
100 1 $aCLARO, F. C.
245 $aLow cost membrane of wood nanocellulose obtained by mechanical defibrillation for potential applications as wound dressing.$h[electronic resource]
260 $c2020
520 $aLarge wounds are characterized by clini-cal and surgical challenges, requiring numeroussearches on demand for inexpensive biocompatiblematerials that produce the best quality of cutaneoushealing. Cellulose is a biopolymer of greatest abun-dance, good biocompatibility and wide applicationdue to its chemical and physical properties. This studywas aimed to develop and characterize low costmembranes of wood cellulose nanofibrils for potentialapplication as a wound dressing in comparison to acommercial porous regenerating membrane. An inex-pensive mechanical method was used to defibrillatecellulose, and later the membranes were obtained fromthe nanofibrils by filtering and drying under mildpressure. The techniques employed for characteriza-tion included scanning electron microscopy, physicaltesting, application in vivo and cost-effectivenessanalysis. The membranes presented promising phys-ical properties for application as cutaneous dressing,with characteristic translucency allowing the evalua-tion of the wound without the need of removal andexchange of the dressing. Wood nanocellulose dress-ing seems to be promising for wound care since itpresented good adhesion to the moist wound surfacesthus promoting the most efficient repitialization in thefirst 4 days. No allergic reaction or inflammatoryresponse to wood nanocellulose dressings wasobserved. The wood nanocellulose membranes standout as a potential wound dressing, as it shows similarefficacy of bacterial cellulose dressing. Besides theefficacy, the membrane developed in this studypresents a simpler, faster and cheaper manufacturingprocess, which may reduce the production cost by99%
650 $aNanomaterials
653 $aBiocompatible
653 $aCost-effectiveness
653 $aHealing
653 $aNanofiber
653 $aNanofibra
653 $aNanomaterial
700 1 $aJORDÃO, C.
700 1 $aVIVEIROS, B. M. de
700 1 $aISAKA, L. J. E.
700 1 $aVILLANOVA JUNIOR, J. A.
700 1 $aMAGALHAES, W. L. E.
773 $tCellulose$gv. 7, p. 10765-10779, 2020.
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