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Mention de date : 10/2001
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Degree of opening-up of the leather structure characterized by acoustic emission / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 10 (10/2001)
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Titre : Degree of opening-up of the leather structure characterized by acoustic emission Type de document : texte imprimé Auteurs : Cheng-Kung Liu, Auteur ; Nicholas P. Latona, Auteur ; Gary L. DiMaio, Auteur Année de publication : 2001 Article en page(s) : p. 367-381 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Liming is one of the key steps in the leather-making process - to remove hair and non-collagenous materials from the hide and, more importantly, to open up the fibrous structure for tanning and lubrication. However, the leather industry lacks an effective means to identify proper liming conditions that produce a sufficient degree of opening-up. As part of our effort to investigate the applications of acoustic emission technology to leather manufacture, we have examined the feasibility of using the acoustic emission (AE) technique to measure the degree of opening-up of leather produced with various liming times. Leather samples were stretched and contacted with an acoustic sensor to collect various acoustic quantities. Observations showed that a change in the degree of opening-up of the fiber structure associated with the increase of liming time can be detected by a history plot of acoustic emission counts. The samples with less than 24 hours liming show a relatively smooth history plot, whereas the samples with a liming time greater than 24 hours produce a pronounced saw-shaped pattern, and the longer the liming time, the more erratic the pattern becomes. This behavior mirrors the change in the extent of opening-up of the fibrousstructure engendered by the lime action. We have concluded that a qualitative association exists between the degree of opening-up of leather and the acoustic counts patterns measured by an AE analyzer. The results of this work may provide a route tomonitor the degree of opening-up of leather. En ligne : https://drive.google.com/file/d/1YyFJnJ94vP5CvllhTnob7wyj32PG1tbS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4359
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 10 (10/2001) . - p. 367-381[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001567 - Périodique Bibliothèque principale Documentaires Disponible Electron beam irradiation preservation of cattle hides in a commercial-scale demonstration / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 10 (10/2001)
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Titre : Electron beam irradiation preservation of cattle hides in a commercial-scale demonstration Type de document : texte imprimé Auteurs : David G. Bailey, Auteur ; Gary L. DiMaio, Auteur ; Andrew G. Gehring, Auteur ; Graeme D. Ross, Auteur Année de publication : 2001 Article en page(s) : p. 382-392 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In 1999, the USDA approved the use of electron beam and gamma ray irradiation for the cold pasteurization of red meat including the elimination of E. coli O157-H7 in hamburger. Titan, Incorporated, of San Diego has contracted with a major red meat producer to construct the first electron beam irradiation facility dedicated to this purpose. This opens up the possibility of applying electron beam technology to preserve cattle hides in order to eliminate environmentally hazardous brine curing in these same packing plants. With this in mind, Titan entered into a Memorandum of Understanding with the Agricultural Research Service to conduct an industrial-scale evaluation of the use of electron beam irradiation for cattle hide preservation. We have conducted a one-hundred-and-fifty-hide matched-side experiment to evaluate preservation, leather quality and yield of electron-beam-preserved cattle hides as compared to brine-cured hides. The hides in this study were individually identified immediately after slaughter in Schuyler, NE, trucked to a tannery in St. Joseph, MO, to prepare them for irradiation, trucked to Cranbury, NJ, for irradiation and then returned to St. Joseph to be tanned. A total of three weeks elapsed between hide removal and tanning. After storage at room temperature, all of the hides appeared to be as fresh and clean as they were just after flaying. Weight, area and visual quality were measured at various stages throughout the process. With the exception of draw, which was considerably better on the irradiated sides compared to the brine sides, all of the parameters measured were equivalent for both preservation treatments. An analysis of the results obtained will be presented along with the potential impact of cattle hide irradiation on the tanning and packing industries. En ligne : https://drive.google.com/file/d/1djIQkTZvlO7uOhm9HLdIHqmGFFScmUsA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4360
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVI, N° 10 (10/2001) . - p. 382-392[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001567 - Périodique Bibliothèque principale Documentaires Disponible Leather made from the hides of double-muscled cattle has satisfactory physical characteristics / S. M. Mozersky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 10 (10/2001)
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Titre : Leather made from the hides of double-muscled cattle has satisfactory physical characteristics Type de document : texte imprimé Auteurs : S. M. Mozersky, Auteur ; Susan K. Iandola, Auteur ; William N. Marmer, Auteur Année de publication : 2001 Article en page(s) : p. 393-397 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Because of the relatively high efficiency with which they produce lean meat, two breeds of cattle which exhibit a high frequency of muscle hypertrophy (mh, commonly referred to as "double muscling"), viz., Piedmontese and Belgian Blue, are being considered for commercial breeding as beef animals. Double muscling results from a genetic deficiency of myostatin, the protein which normally regulates, i.e., limits, muscle growth. Since "double-muscled" animals have a somewhat larger than normal physique, and since the effect of myostatin deficiency is reasonably presumed to include hypertrophy of muscle tissue in the hide, it became important to determine whether the hides of such animals are affected by the condition and would yield leather with unusual, e.g., deficient, physical characteristics. To address this question the physical characteristics of leathers made from the hides of homozygous normal (+/+), homozygous myostatin deficient (mh/mh), and heterozygous (+/mh) cattle were compared to each other. No significant differences between the groups were found, except that leather made from mh/mh cattle had a slightly greater stiffness than leather made from +/+ cattle. Double muscling thus poses no threat of harm (or promise of substantial benefit) to the leather manufacturer which would require monitoring hides from animals endowed with this condition. En ligne : https://drive.google.com/file/d/1p0HHdV_-gw0HW4lnANeaJDLuTh-YoN3V/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4361
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Code-barres Cote Support Localisation Section Disponibilité 001567 - Périodique Bibliothèque principale Documentaires Disponible Sheep-pelt bating with acid protease / Li Yongquan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 10 (10/2001)
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Titre : Sheep-pelt bating with acid protease Type de document : texte imprimé Auteurs : Li Yongquan, Auteur Année de publication : 2001 Article en page(s) : p. 398-400 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Acid protease produced by Aspergillus usamii is an ideal bating agent for sheep-pelt. The bating conditions for sheep-pelt have been studied by an orthogonal statistical test. The experimental results showed that the optimum conditions were concentration of acid protease about 45pg/ml, temperature about 38°C, time about 8 hours, and pH 2.5-3.0. The study also showed that acid protease was more effective than neutral protease as a sheep-pelt bating agent. En ligne : https://drive.google.com/file/d/1HZrfyOUOju8_ZMQTpioWTiPTnsh5HAfn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4362
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Code-barres Cote Support Localisation Section Disponibilité 001567 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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001567 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |