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Effects of some important ectoparasites on the grain quality of cattlehide leather / A. L. Everett in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXII (Année 1977)
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Titre : Effects of some important ectoparasites on the grain quality of cattlehide leather Type de document : texte imprimé Auteurs : A. L. Everett, Auteur ; R. W. Miller, Auteur ; W. J. Gladney, Auteur ; Mary V. Hannigan, Auteur Année de publication : 1977 Article en page(s) : p. 6-24 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acariens
Cuirs et peaux -- Défauts
Cuirs et peaux de bovins
Démodécie
Ectoparasites
Evaluation
Mouches
Parasitoses
Poux
Taons
TiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hides and leather from 23 cattle exposed to massive infestations of bloodsucking external parasites were evaluated for grain damage in a co-operative series of tests over an eight-year period. In tests under controlled conditions, horn flies, and two species of mosquitoes caused no significant damage to leather grain ; four species of hard ticks caused severe damage in every case, with no apparent differences among the species. Damage from the lone star tick is illustrated at different healing stages. In tests of cattle exposed to severe infestations of parasites under natural conditions, the shortnosed cattle louse caused no significant grain damage inleather ; horse flies and deer flies caused slight but consistent, and possibly significant, damage ; and incidentally occuring demodectic mites caused moderate to severe damage to some of the hides. The detailed nature of the damage is illustrated. Investigation of the mite infestations provided useful information on the transmission of demodectic (follicular) mange, or demodicosis. Note de contenu : - EXPERIMENTAL PROCEDURES : Test organisms - Test cattle - Test hides - Fly andmosquito test - Louse test - Tick test
- RESULTS AND DISCUSSION : Effects of flies, mosquitoes, and lice - Effect of demodectic mites - Effects of ticks
- Table 1 : Identification of ectoparasites tested on cattle
- Table 2 : Treatments applied to cattle in four separate tests
- Table 3 : Biting flies counted on test steers
- Table 4 : Deer and horse flies trapped at remote pasture in 1973
- Table 5 : Evaluation of hide and leather damage from ectoparasitesEn ligne : https://drive.google.com/file/d/1cduH7h7Bdt4FIMzI62TxgBqsZrmaRmZz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38254
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXII (Année 1977) . - p. 6-24[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008511 - Périodique Archives Documentaires Exclu du prêt Polymer-leather composites VII. Morphological and mechanical properties of selected acrylate-leather composite materials / Edmund F. Jordan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
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Titre : Polymer-leather composites VII. Morphological and mechanical properties of selected acrylate-leather composite materials Type de document : texte imprimé Auteurs : Edmund F. Jordan, Auteur ; Bohdan Artymyshyn, Auteur ; Alfred E. Everett, Auteur ; Robert J. Caroll, Auteur ; Mary V. Hannigan, Auteur ; Stephen H. Feairheller, Auteur Année de publication : 1982 Article en page(s) : p. 508-532 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Morphological, mechanical, and water absorptive properties were obtained for the same polymer-leather composite materials whose preparation was described in the preceding paper. Light microscopy and scanning electron microscopy (SEM) were used to obtain micrographs of cross-sections of the composites and of their negative replicas. The latter consisted of isolated continuous polymer phase of the methyl methacrylate composites imprinted with the histological features of the parent leather. These replicas were obtained by hydrochloric acid digestion of the collagenous material from the composites, leaving behind the undisturbed polymer phase. Both light and SEM micrographs revealed that polymer was packed mostly in coarse, tight domains around individual fibers in fiber bundles, thus impeding fiber movement on deformation. Some polymer xas found in the vicinity of fibrils in the composites prepared from emulsions. Little protection from static imbibed water was afforded by either method of composite preparation (emulsion or bulk-solution), although rates for the latter were retarded. The relative stiffness of each composite compared to its untreated control, regardless of the modifying polymer introduced, increased with increase in polymer composition level to about 20 percent; thereafter the extent of stiffness depended on the inherent stiffness of the modifying polymer at ambient temperature. Relative stiffness could be decreased between 45 and 65 percent by staking and fatliquoring similarly prepared n-butyl acrylate (BA) + methyl methacrylate (MMA) composite materials containing 18 to 30 percent polymer. Relative tensile stregths declined with polymer increase in the order MMA > BA > BA + MMA. Note de contenu : - EXPERIMENTAL : Materials and procedures - Matching hide study
- RESULTS AND DISCUSSION : Morphology - Water absorption - Mechanical properties at ambient temperature - The effect of temperature on mechanical properties - the effect of fatliquoring and staking on mechanical propertiesEn ligne : https://drive.google.com/file/d/1WFcOQ6tjccdUL5cKfwbYKbzSsXYPeLl0/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17503
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XXVII (Année 1982) . - p. 508-532[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008515 - Périodique Archives Documentaires Exclu du prêt Solvent preservation of pigskins / Peter R. Buechler in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
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Titre : Solvent preservation of pigskins Type de document : texte imprimé Auteurs : Peter R. Buechler, Auteur ; John S. Fisher, Auteur ; Matthew P. Dahms, Auteur ; Mary V. Hannigan, Auteur Année de publication : 1987 Article en page(s) : p. 200-211 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Some 90 million butcher hogskins per year are potentially available and can be utilized for leather manufacture. For optimum utilization with a minimum waste problem, a beamhouse and processing plant central to the currently concentrated pork packing plants is envisioned. Fresh pigskins brought to this facility would receive beamhouse treatment followed by a preservation process and could then be shipped to pigskin leather manufacturers wherever they are located. Studies of solvent dehydration preservation processes have shown that these processes can be used after bating. Dehydrated bated stock offers a number of advantages: (1) A light-weight product, one-sixth the shipping weight of fleshed raw pigskins is obtained. (2) The stocks keep indefinitely under most ambient conditions, unless contacted by liquid water. (3) The hydrated stock can be graded and sold on the basis of its visible surface defects. (4) Water can be easily added to the stock with no adverse effect on subsequent tanning. (5) Leathers from the dehydrated pigskins subsequently re-wet and tanned have fewer oil spots and better chrome distribution than control leathers. En ligne : https://drive.google.com/file/d/1YK9HdODtCvLnnNWHHL7smomUueSUDSL_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9033
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Code-barres Cote Support Localisation Section Disponibilité 008087 - Périodique Bibliothèque principale Documentaires Disponible Wet process technology II. the effect of process variations on hides and effluents + / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)
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Titre : Wet process technology II. the effect of process variations on hides and effluents + Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Edward J. Diefendorf, Auteur ; John G. Phillips, Auteur ; Mary V. Hannigan, Auteur ; Bohdan Artymyshyn, Auteur ; Stephen H. Feairheller, Auteur ; David G. Bailey, Auteur Année de publication : 1986 Article en page(s) : p. 19-34 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Detailed processes supplied by cooperating tanners describing the conversion of raw hides to the blue were duplicated in the Eastern Regional Research Center pilot scale tannery. Chemical analyses of the hides and the effluents were carried out on sample from each processing stage. In addition, physical testing and histological evaluation were performed on the hide at each stage of processing. This paper discusses some of the effects of process variations on the compositions of the hides and the effluents. En ligne : https://drive.google.com/file/d/1lrs1SnxaDF4-kuSGBj4C-9Iorc4otKFl/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9122
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 19-34[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008086 - Périodique Bibliothèque principale Documentaires Exclu du prêt Wet process technology III. development of a standard process / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)
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Titre : Wet process technology III. development of a standard process Type de document : texte imprimé Auteurs : Maryann M. Taylor, Auteur ; Edward J. Diefendorf, Auteur ; Mary V. Hannigan, Auteur ; Bohdan Artymyshyn, Auteur ; John G. Phillips, Auteur ; Stephen H. Feairheller, Auteur ; David G. Bailey, Auteur Année de publication : 1986 Article en page(s) : p. 43-61 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A standard process which converts rawhide to the blue was developed which was typical of current techniques. A baseline of information was obtained which could be used to evaluate innovative processes. A description will be given of the process, its reproducibility, and the resulting chemical and physical analyses. En ligne : https://drive.google.com/file/d/1QytjRCS70D7OaMSlJBdX2cDizAfMJY-6/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9123
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 43-61[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008086 - Périodique Bibliothèque principale Documentaires Exclu du prêt