Characterization of biopolymers prepared from gelatin and sodium caseinate for potential use in leather processing / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 4 (04/2005)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 4 (04/2005) . - p. 149-159 Titre : Characterization of biopolymers prepared from gelatin and sodium caseinate for potential use in leather processing Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Eleanor M. Brown, Auteur ; William N. Marmer, Auteur Année de publication : 2005 Article en page(s) : p. 149-159 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Biopolymers formed from crosslinking of different proteins is an area of growing interest. Much has been reported in the literature on the properties of a variety of biopolymers synthesized by enzymatic treatment. These products have the advantage of possessing the unique properties of each protein and have the potential for generating novel products. Prior research from this laboratory demonstrated that gelatins of varying qualities could be enzymatically modified to give products with superior functional properties. These modified gelatins, when examined by SDS-PAGE, were highly polymerized as demonstrated by an increase in higher molecular weight species. In this study, we examined individually the properties of modified proteins from renewable resources, specifically gelatins and casein, as well as their enzymatically combined products. The physical properties and molecular weight distribution of the gelatin conjugate products show that the degree of crosslinking was enhanced by addition of even small amounts of the secondary protein. These unique reactions have the potential of generating products used in leather processing, more specifically in preparation of coatings or as fillers for the leather. En ligne : https://drive.google.com/file/d/1qt0UDah4PSQ7oQqUpRQfHYfX6B_wfKP5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4071 [article]

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Characterization of products isolated by enzyme treatment of chromium-containing leather waste / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 10 (10/1992)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVII, N° 10 (10/1992) . - p. 380-388 Titre : Characterization of products isolated by enzyme treatment of chromium-containing leather waste Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Edward J. Diefendorf, Auteur ; Eleanor M. Brown, Auteur ; William N. Marmer, Auteur Année de publication : 1992 Article en page(s) : p. 380-388 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Enzymic processing of chrome shavings and trimmings has previously been shown to be a viable treatment of this substantial waste product generated by the tanning industry.Characterization of the chrome cakes ant the protein generated by these treatments was an important next step in this research.Tanneries use different type of processes to tan the leather and these varying processes are dependent on the type of chrome should be present in the effluent.Chrome shavings were obtained from three tanneries.The blue stock had been processed by conventional, albeit different, tannages.For optimal solubility, an individual pretreatment was developed for each type of shavings.They were then treated enzymically and the chrome cake and the protein fraction were isolated.Analyses of the shavings,the chromium-containing cakes and the protein fraction showed that chromium containing leather waste from a variety of sources can be enzymically digested when the appropriate pretreatment is performed.The chemical composition of the isolated products is dependent on the type of treatment and on the composition of the original chromium-containing leather waste product. En ligne : https://drive.google.com/file/d/10VQ5_h8DSqgvmHLdCL5fTyHAm3Cde5px/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8283 [article]

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Chemical modification of protein products isolated from chromium-containing solid tannery waste and resultant influence on physical and functional properties / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LCIV, N° 5 (07/1999)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LCIV, N° 5 (07/1999) . - p. 171-181 Titre : Chemical modification of protein products isolated from chromium-containing solid tannery waste and resultant influence on physical and functional properties Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; William N. Marmer, Auteur ; Eleanor M. Brown, Auteur ; Luisa F. Cabeza, Auteur Année de publication : 1999 Article en page(s) : p. 171-181 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Samples of gelatin extracted from chromium-containing leather waste by different protocols were chemically modified with glutaraldehyde, glyoxal and carbodiimide and compared to similarly modified commercial gelatins. Glutaraldehyde appeared to be a very efficient cross-linker, giving gels that would not melt at 70 oC with the addition of only 2% glutaraldehyde but with a decrease in their rigidity when the amount of glutaraldehyde was increased. Foaming tests on these samples demonstrated that the addition of low amounts of glutaraldehyde increased both the foam capacity and the foam stability of the gelatins. Glyoxal modification did not have such an effect on the gel strength and melting point of the samples. It did not increase foam capacity but did increase foam stability, it gave better adhesive properties to these gelatins and it did increase dramatically their emulsification capacity. Carbodiimide had similar effects on gel strength as glyoxal; it did increase dramatically the melting point of commercial gelatin but had no effect on the melting point of the extracted gelatins. It decreased the foam and adhesive properties of all the samples, but it did increase the emulsification capacity of the extracted gelatins. The study demonstrates that the functional properties of chemically modified gelatin extracted from chromium-containing leather waste were changed, and, as a result, new uses could be identified for these value-added products. Note de contenu : - EXPERIMENTAL : Material - Chemical modification - METHODS : Analyses - Gel strenght - Melting point - Foamability - Adhesive test - Emulsion capacity En ligne : https://drive.google.com/file/d/1lbZ5PcQBffG9si0Z7QXouceREnsJPz67/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4452 [article]

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Computer-assisted method to measure the adhesive properties of hydrolysis products from collagen / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 2 (02-03/1997)

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCII, N° 2 (02-03/1997) . - p. 28-37 Titre : Computer-assisted method to measure the adhesive properties of hydrolysis products from collagen Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Luisa F. Cabeza, Auteur ; William N. Marmer, Auteur ; Eleanor M. Brown, Auteur Année de publication : 1997 Article en page(s) : p. 28-37 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Historically, hydrolysis products from collagen, such as technical gelatin and animal glue, were used as adhesives. With the advent of synthetic adhesives, those products from collagen became less popular. Because of the "green revolution" over environmental concerns, animal glues are again becoming appealing. Characterization of adhesives has, at best, been subjective. The Jellygram and/or the bloom values are presently being adopted by adhesive companies, that utilizes a commercially available computerized texture analyzer. The advantages of this method are that it not only measures the tackiness but also the work of adhesion, and it requires onlya small amount of sample. Subtle differences in the products that cannot be measured by the prevailing technology can be determined by this technology. Furthermore, analysis of the standard eviation and coefficient of variation shows that the method has good precision when relatively simple guidelines are followed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7684 [article]

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Effect of deionization on the physical properties of gelable protein products recovered from solid tannery waste / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXX, N° 12 (12/1995)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXX, N° 12 (12/1995) . - p. 365-374 Titre : Effect of deionization on the physical properties of gelable protein products recovered from solid tannery waste Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Edward J. Diefendorf, Auteur ; William N. Marmer, Auteur ; Eleanor M. Brown, Auteur Année de publication : 1995 Article en page(s) : p. 365-374 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Extraction of gelatin or gelable protein products from solid tannery by-products has been demonstrated previously. During the commercial manufacture of gelatin from limed hides, skins and bones, it is common practice to pass the gelatin through a mixed-bed deionizing column in order to reduce the ash content of the proteinK. In the gelable protein products that we are isolating from chrome-tanned waste, the ash content is relatively high and is a function of both the alkali treatment and the original composition of the chrome waste. We have shown that deionizing the protein will reduce the ash. There is, however, a question as to what effect this treatment will have on the bloom and the viscosity - commonly reported analyses for gel quality. Moreover, we have previously shown that the choice of alkali will affect the physical properties were improved in the deionized samples and this is probably due to the increased protein concentration with a small effect contributed by the removal of the ash. Proteins yields were also calculated and we found that the type and concentration of alkali used to extract the gelable protein will affect the yield. We also demonstrated that these processes are reproducible and that good material balances can be obtained. En ligne : https://drive.google.com/file/d/1b1sA1Pj_vqZsOgvqLMTNDwU3fAm9Qqcr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17838 [article]

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Effect of fillers prepared from enzymatically modified proteins on mechanical properties of leather / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 4 (04/2008)  

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Effect of processing variable on ash content of gelable and hydrolyzed protein products isolated from treatment of chronium leather waste / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 1 (10/1993)  

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Effect of various alkalinity-inducing agents on chemical and physical properties of protein products isolated from chromium-containing leather waste / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 7 (07/1994)  

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Efficiency of enzymic solubilization of chrome shavings as influenced by choice of alkalinity-inducing agents / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 6 (06/1991)  

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Enzymatic dehairing of cattlehide with an alkaline protease isolated from aspergillus tamarii a,b / Daynandan Anandan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 10 (10/2008)  

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Enzymatic modification of hydrolysis products from collagen using a microbial transglutaminase. I. Physical properties / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 9 (09/2001)  

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Enzymatic modification of hydrolysis products from collagen using a microbial transglutaminase. II. Preparation of films / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 6 (06/2002)  

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Enzymatic modification of hydrolysis products from collagen using a microbial transglutaminase. III. Preparation of films with improved mechanical properties / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 11 (11/2003)  

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Estimation of the sulfated glycosaminoglycan content of bovine skin with alcian blue / S. M. Mozersky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 9 (09/2003)  

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Evaluation of degreasers as brine curing additives / Eduard Hernàndez Balada in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 5 (05/2009)  

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Evaluation of polymers prepared from gelatin and casein or whey as potential fillers / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 4 (04/2007)  

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Extraction of value added byproducts from the treatment of chromium containing collagenous leather industry waste / Maryann M. Taylor in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 1 (01-02/1997)  

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Functional properties of hydrolysis products from collagen / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIII, N° 2 (02-03/1998)  

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Immunochemical estimation of the decorin core-protein content of preparations of bovine decorin / S. M. Mozersky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 7 (07/2004)  

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Influence of pepsin and trypsin on chemical and physical properties of isolated gelatin from chrome shavings / Luisa F. Cabeza in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCII, N° 8 (10/1997)  

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