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Utilization of agricultural by-products to partially replace gelatin in preparation of products for leather / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 1 (01/2015)
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Titre : Utilization of agricultural by-products to partially replace gelatin in preparation of products for leather Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Lorelei P. Bumanlag, Auteur ; J. Lee, Auteur ; Nicholas P. Latona, Auteur ; Eleanor M. Brown, Auteur ; Cheng-Kung Liu, Auteur Année de publication : 2015 Article en page(s) : p. 13-18 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères -- Synthèse
Gélatine -- Produits de remplacement
Glucides
Polyphénols
Ressources agricoles
Wet-white (tannage)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : When polyphenolic-modified gelatin-products were used as fillers, improvements were seen in the subjective properties of the leather. When the treated samples were compared to control samples, there were no significant changes in mechanical properties. At the present time, gelatin is in short supply, costs are increasing, and there is an urgent need to find a substitute that could be combined with the gelatin, thereby, partially replacing and reducing the amount of gelatin required, with the goal that the new products would retain the desired characteristics of gelatin products. We have evaluated the potential of producing biopolymers from the reaction of polyphenols with gelatin in combination with other proteins (e.g. whey) or with carbohydrates (e.g. chitosan and pectin). Several researchers have recently demonstrated the feasibility of these reactions. These combinations would take advantage of the distinctive properties of both species and at the same time create products with improved functional properties. Recently, the preparation of polyphenolic-modified gelatin/whey biopolymer products was investigated, and the results of product characterization using physicochemical analyses indicated optimal products that could be used as fillers. In this continuing study, these products were applied to wet white, that was then finished, and subjective and mechanical properties were evaluated. At the same time a method was developed to determine the rate of uptake of the product. Results of the studies will be presented. These findings could further add to the knowledge of using renewable resources in production of unique products that may have leather processing application. Note de contenu : - MATERIALS : Application of gelatin/WPC/tara product to wet white stock (area samples)
- ANALYSES : Physical properties, mechanical properties and molecular weight distribution - Subjective evaluation RCF leather - Optical microscopy (with epi-fluorescent attachment) - Scanning Electron Microscopy (SEM) - Protein concentration determination
- TREATMENT OF WET WHITE AND BCA ANALYSIS
- SEM AND EPI-FLUORESCENT IMAGERYEn ligne : https://drive.google.com/file/d/1osGv9Qvyx2UsJkmJJiM0aPJ5INeYQq8_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22792
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 1 (01/2015) . - p. 13-18[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16774 - Périodique Bibliothèque principale Documentaires Disponible Xantham gum - Bio-based raw material for wood adhesive / Ravindra V. Gadhave in PAINTINDIA, Vol. LXXIII, N° 6 (06/2023)
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Titre : Xantham gum - Bio-based raw material for wood adhesive Type de document : texte imprimé Auteurs : Ravindra V. Gadhave, Auteur Année de publication : 2023 Article en page(s) : p. 70-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux
Biopolymères
Bois -- Collage
Colles:Adhésifs
Glucides
Gomme de xanthaneLa gomme xanthane est un polyoside obtenu à partir de l'action d'une bactérie, la Xanthomonas campestris. Elle est soluble à froid et est utilisée comme additif alimentaire sous le code E415 pour ses propriétés épaississantes et gélifiantes afin de modifier la consistance des aliments.
Le xanthane est l'un des exopolysaccharides excrétés par divers microorganismes du sol (bactéries notamment). Il joue un rôle important, à l'échelle moléculaire, dans la formation et la conservation des sols3, tout comme le dextrane, le rhamsane ou les succinoglycanes.Index. décimale : 667.9 Revêtements et enduits Résumé : Due to their lower environmental impact, ease of accessibility, low cost, and biodegradability, bio-renewable sources have been used extensively in the last several decades to synthesize adhesives, substituting petrochemical-based adhesive. Vegetable oils (including palm, castor, jatropha, and soybean oils), lactic acid, potato starch, and other bio¬renewable sources are all excellent sources for the synthesis of adhesives that are being taken into consideration for the synthesis of "eco-friendly" adhesives. Due to their widespread use, accessibility, affordability, and biodegradability, biobased raw materials like carbohydrates used to synthesize wood and wood composite adhesive have gradually replaced petrochemical-based adhesives. Recently, xanthan gum, derived from a naturally occurring polymer, has drawn the interest of scientists as a potentially petroleum source replacement. lt possesses specific rheological characteristics, excellent water solubility, and stability to heat, and can be used as a binder, thickener, suspending agent, and stabilizer. Xanthan gum increases the adhesive strength in addition to increasing the viscosity of water-soluble adhesives. This article discusses xanthan gum as a potential substitute for traditional raw materials derived from petroleum that are used as a raw material for adhesives. Note de contenu : - Xantham gum structure and properties
- Xantham gum-based wood adhesives
- Fig. 1 : Structure of xantham gumEn ligne : https://drive.google.com/file/d/1OHGAMBO1Mk5JLsz02tYR_kGVQKK4li1c/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39935
in PAINTINDIA > Vol. LXXIII, N° 6 (06/2023) . - p. 70-78[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24177 - Périodique Bibliothèque principale Documentaires Disponible Your ally for natural urban skin protection / Stéphanie Alves in PERSONAL CARE EUROPE, Vol. 13, N° 3 (04/2019)
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Titre : Your ally for natural urban skin protection Type de document : texte imprimé Auteurs : Stéphanie Alves, Auteur ; Fayçal Ounnas, Auteur Année de publication : 2019 Article en page(s) : p. 83-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Actifs anti-pollution
Biomolécules actives
Cosmétiques
Extraction (chimie)
Extraits de plantes:Extraits (pharmacie)
Flavonoïdes
Glucides
Peau -- Effets de la pollution atmosphérique
Peau -- Soins et hygiène
Protection cutanéeIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Pollution is present everywhere in urban areas. Indoor, outside, skin is exposed to pollution all day long. How can you protect your skin from this constant stress ? Biolie has figured it out for you! Pollution is composed of pesticides, heavy metals, particles and other harmful chemicals that will disrupt skin barrier function and microbiota. It will produce several intracellular damages by oxidative stress, activation of mitochondrial AhR, ATP production decrease and inflammation. Rich in citroflavonoids and saccharides, Biolime will work in and out of skin to fight against pollution damage. Note de contenu : - The art of enzymatic extraction
- A bio-guiding tool
- Extract of lime co-product
- Urban dust - A standard approved by FDA
- Urban dust and mitochondria dysfunction
- Mitochondria protection
- Polyphenols - the key to the activity ?
- Fig. 1 : Patented enzymatic extraction process
- Fig. 2 : Biorefinery concept
- Fig. 3 : Screenzyme bio-guiding tool
- Fig. 4 : Biolime extraction process
- Fig. 5 : Urban pollution damages by including oxidative stress, mitochondria dysfunction and inflammation
- Fig. 6 : Olive Tail Moment measurement on epidermal keratinocytes. ANOVA, significant test p<0.01 (n=3)
- Fig. 7 : Adenosine triphosphate (ATP) measurement on epidermal keratinocyte ANOVA, significant test p<0.05 (n=3)
- Fig. 8 : Citroflavonoids present in Biolime
- Table 1 : Biolime profile
- Table 2 : CharacteristicsEn ligne : https://drive.google.com/file/d/1HsWITlA3EodlX6uv2tnTZKN3_YXYNfoq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32240
in PERSONAL CARE EUROPE > Vol. 13, N° 3 (04/2019) . - p. 83-86[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20796 - Périodique Bibliothèque principale Documentaires Disponible