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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
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Code-barres Cote Support Localisation Section Disponibilité 16774 - Périodique Bibliothèque principale Documentaires Disponible Utilization of chromium-tanned leather solid wastes in microencapsulation / Bugra Ocak in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 7 (07/2011)
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Titre : Utilization of chromium-tanned leather solid wastes in microencapsulation Type de document : texte imprimé Auteurs : Bugra Ocak, Auteur ; Ahmet Aslan, Auteur ; Gürbüz Gülümser, Auteur Année de publication : 2011 Article en page(s) : p. 232-238 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Collagène
Cuir -- Déchets
Encapsulation
Fourier, Spectroscopie infrarouge à transformée de
Glutaraldéhyde
Huile essentielle de lavande
Hydrolysats de protéines
Microscopie électronique à balayage
Récupération (Déchets, etc.)
Recyclage (déchets, etc.)
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this research, solid collagen-based protein hydrolysate was isolated from chromium-tanned leather wastes and its chemical properties were determined. After that, the use of collagen hydrolysate (CH) was investigated as a polymeric wall material in the microencapsulation process. The effects of variations in concentrations of CH, lavender oil (LO) and glutaraldehyde (GA), which were used during the microencapsulation process, on the oil load of microcapsules, oil content, encapsulation efficiency and release rate of oil were determined. The morphological structure of the microcapsules was investigated using optical and scanning electron microscopes (SEM). It was determined by FTIR studies that there was no evidence for any significant interaction between CH and LO. Note de contenu : MATERIALS AND METHODS : Preparation of collagen hydrolysate - Phase separation behaviour of collagen hydrolysate - Preparation of microcapsules - Determination of some chemical characteristics of collagen hydrolysate - Calibration curve of lavender oil - Determination of the oil load, oil content and encpsulation efficiency - Oil release studies - Optical and scanning electron microscopy studies - FTIR study.
RESULTS AND DISCUSSION : Some chemical characteristics of collagen hydrolysate - The effect on microcapsules of variations in oil concentration - Effects of variation of hydrolysate concentration - The effect of variation in glutaraldehyde concentration - Optical and scanning electron microscopic studies - Fourier Transform Infrared (FTIR) study.En ligne : https://drive.google.com/file/d/1vpL-zU-enBe_sD-OaV0OOevqpaXvpKVM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12033
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 7 (07/2011) . - p. 232-238[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013127 - Périodique Bibliothèque principale Documentaires Disponible Utilization of collagen hydrolysate in keratinase production from bacillus subtilis ATCC 6633 / Ahmet Aslan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 4 (04/2007)
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Titre : Utilization of collagen hydrolysate in keratinase production from bacillus subtilis ATCC 6633 Type de document : texte imprimé Auteurs : Ahmet Aslan, Auteur ; Huseyin Ata Karavana, Auteur ; G. Gulumser, Auteur ; I. Yasa, Auteur ; B. H. Cadirci, Auteur Année de publication : 2007 Article en page(s) : p. 129-134 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this study, chrome shavings from tanning industry were hydrolyzed with a commercial protease in alkali medium. Some chemical analyses were made and amino acid composition of collagen hydrolysate obtained from chrome shavings determined. This collagen hydrolysate was used for the production of keratinase from Bacillus subtilis ATCC 6633 as a carbon and nitrogen source. The culture grew in fermentation medium containing various proportion of collagen hydrolysate (1-5% w/v) at pH 7.0 and pH 10.0 with agitation rate of 200 rpm. The best keratinase production was obtained from the medium containing 1% hydrolysate (w/v) at pH 7.0 for 36 hours and with 3% hydrolysate (w/v) at pH 10.0 for 24 hours. En ligne : https://drive.google.com/file/d/1fF1_2B0896goPd5Blqsss2iwmxQUJdnn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3361
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Code-barres Cote Support Localisation Section Disponibilité 007154 - Périodique Bibliothèque principale Documentaires Disponible Utilization of leather industry pre-fleshings in biodiesel production / Selime Colak in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 4 (04/2005)
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Titre : Utilization of leather industry pre-fleshings in biodiesel production Type de document : texte imprimé Auteurs : Selime Colak, Auteur ; O. Sari, Auteur ; Hasan Ozgunay, Auteur ; Gökhan Zengin, Auteur Année de publication : 2005 Article en page(s) : p. 137-141 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fleshing wastes from tanneries create major environmental problems. Despite their considerable fat content, these wastes do not find important usage. Their disposal is also troublesome and costly. We have investigated the possible use of this fat in the production of biodiesel (fatty acid methyl esters) by transesterification, for use as a replacement for fossil fuels. The fat was released from the waste by boiling with water under high speed grinding, dried and used without further refining for the production of fatty acid methyl esters. Evaluation of the product indicated that it was suitable for use as a biodiesel fuel. Thus, a contaminating waste can be transformed into an environmentally friendly fuel, providing economical and ecological profits. En ligne : https://drive.google.com/file/d/1BHI7jGyYcZfsCoYJ-pYOJuG4aYyyeRFO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4069
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Code-barres Cote Support Localisation Section Disponibilité 001826 - Périodique Bibliothèque principale Documentaires Disponible Utilization of leather waste - animal feedstuff for chrome shavings : Part 1, pilot plant study / M. Alves dos Reis in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75, N° 1 (01-02/1991)
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Titre : Utilization of leather waste - animal feedstuff for chrome shavings : Part 1, pilot plant study Type de document : texte imprimé Auteurs : M. Alves dos Reis, Auteur ; V. Beleza, Auteur Année de publication : 1991 Article en page(s) : p. 15-19 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper we present experimental results on the hhydrolysis of chrome tanned shavigs.
It was observed that it is possible to remove chromium down to negligible values (less than 0.1 ppm) when hydrolysis is performed by heating the shavings at 80°C in calcium oxide liquors using the following weight proportions : 0.08 to 0.1 parts CaO, 1 part dried chrome shavings (equivalent to 21 parts wet shavings), 10 parts water. A protein concentrate containing about 80 % crude protein and 25 % essential amino acids was obtained.
An animal nutrition program to study the possible uses of this product was initiated. To obtain enough protein concentrate for this program a pilot plant has been designed and built.
Chicken feeding results have shown that the nutritional value of hydrolysed leather meal is nearly one half of thenutritional value of 44 % protein soybean oil meal and, when used in rations up to a level of 5 % has not caused any loss of appetite or visible metabolic problems to the animals.En ligne : https://drive.google.com/file/d/17Sp_Qp3QnmVeT_X_eeMrQWLmVsYqKft2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8653
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Code-barres Cote Support Localisation Section Disponibilité 006983 - Périodique Bibliothèque principale Documentaires Disponible Utilization of leather waste animal feedstuff from chrome shavings : Part 1, pilot plant study / M. Alves dos Reis in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)
PermalinkUtilization of leather waste animal feedstuff from chrome shavings : Part 2, a model for the hydrolysis kinetics / M. Alves dos Reis in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)
PermalinkUtilization of quality assurance techniques in tanneries / Chris R. Ehret in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
PermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkUV oxidation and recovery system for tannery unhairing waste / Imogene. L. Chang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
PermalinkUV protection against photoageing of garment leathers by ZnO nanoparticles : application of nano ZnO in finishing process as photocatalyst / Bekir Yilmaz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 6 (11-12/2016)
PermalinkPermalinkPermalinkPermalinkPermalinkValorization of pomegranate peel waste as retanning agent in leather industry and investigation of its effect on prevention of Cr(VI) formation / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 2 (02/2023)
PermalinkValorization of sustainable vegetable oil deodorizer distillate as a novel fatliquor / El-Shahat H. A. Nashy in COLLAGEN AND LEATHER, Vol. 5 (2023)
PermalinkValue added leather auxiliaries from paper and pulp industry waste / Mohan Vedhanayagam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 9 (09/2015)
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