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Fungicide evaluation for the protection of wet blue hides / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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Titre : Fungicide evaluation for the protection of wet blue hides Type de document : texte imprimé Auteurs : Alan E. Russell, Auteur ; S. Pinchuck, Auteur ; Desmond R. Cooper, Auteur Année de publication : 1985 Article en page(s) : p. 135-143 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Details are given of various laboratory methods for assessing fungicides for the protection of wet blue hides and evaluating storage margins in production wet blue leathers. Using these methods, a survey of nine commercial fungicide formulations applied to wet blue cuttings has been carried out. Products examined included a number previously found to fall into the low, medium and higher dosage levels (concentrations extending from 0.01 to 0.5 % m/v in 100 % float) to ensure four-month, residual protection. Experimental factors varied including fungicide addition point (pickle or rinse addition) and post-treatment wet blue handling (draining, rinsing, sammying and splitting). The treatment variations examined were aimed at gaining insight into uptake and penetration of the fungicide was found to give markedly improved prediction of field performance. Pickle additionof fungicide was found to give markedly improved storage protection in a number of cases. Post-treatment handling tended to reduce storage protection in effective products only at higher application levels in pickle addition. Decreases due to rinsing and sammying were comparable but tended to be greater after splitting, depending on the degree of fungicide penetration. Post-treatment effects were less marked in rinse application. The results indicate that more detailed assessment of fungicide effectiveness under various conditions in laboratory surveys can provide a better basis for prediction of field performance. Note de contenu : - METHOD : 1. Preparation of the fungal suspension used to inoculate wet blue cuttings - 2. Fungicide treatment method - 3. Testing of treated wet blue leathers - 4. Minimum inhibiting concentration of nutrient agar (MIC).
- EXPERIMENTAL : 1. Factors varied - 2. Preparation of wet blue leathers - 3. Fungal growth assessment.
- RESULTS AND DISCUSSION : 1. Order of fungicide effectiveness - 2. Concentration effectiveness - 3. Fungicide addition point - 4. Effect of post-treatment wet blue handling.En ligne : https://drive.google.com/file/d/1VbuynA9MCiqx05UYIB6B-24YmxBh3l4_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9410
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 69 (Année 1985) . - p. 135-143[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007132 - Périodique Bibliothèque principale Documentaires Disponible The influence of compensatory growth on certain hide and leather characteristics. Part II. Hide and leather yield and leather physical characteristics / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)
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Titre : The influence of compensatory growth on certain hide and leather characteristics. Part II. Hide and leather yield and leather physical characteristics Type de document : texte imprimé Auteurs : Alan E. Russell, Auteur ; S. Pinchuck, Auteur ; J. E. Bruyn, Auteur ; R. T. Naudé, Auteur Année de publication : 1988 Article en page(s) : p. 193-209 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Three groups of nine-month-old beef-type steers were fed on a high (treatment I), medium (treatment II) and low (treatment III) nutritional plane for a period of 21 weeks. At the end of this period, five cattle of each treatment were slaughtered. The remaining cattle of treatments II and III (the restricted groups) were then also fed on a high nutritional plane as for those from treatment I and allowed to grow to a final slaughter mass of 440 kg. Treatments were compared on an equal stage (0 week, control ; 23 and 39 weeks) and mass basis (210 kg, control ; 370 and 440 kg live mass) throughout the trial with respect to hide and leather yield and leather physical characteristics.
High yield (hide mass/carcase mass) was not influenced by nutritional restriction and/or a subsequent period of compensatory growth nor did the hide yield change over the entire trial period.
Leather yield (leather area/green hide mass) was higher for nutritionally restricted animals than for unrestricted animals after the initial 23 week period. This treatment difference was eliminated when treatments were compared on an equal mass basis (370 and 440 kg live mass). Leather yield decreased with growth of the animal.
Full-grain upper leather obtained from the hides of nutritionally restricted animals, particularly in treatment III, were stronger (higher tensile and tear strength and lastometer response at grain crack) and more extensible than upper leathers from the hides of unrestricted animals at 23 weeks and 370 kg live mass. These nutritional difference disappeared after the subsequent period of compensatory growth and treatment comparison at 39 weeks and at 370 kg live mass showed no significant differences in upper leather physical properties.
Leathers of greatest strength and extensibility were obtained from the weaner group of aniamsl and all leather physical characteristics (tensile properties, slit tear force and lastometer response) declined with animal growth. Microscopic examination of cross-sectional fibre structure indicated that features contributing to a decrease in leather strength were the development of coarser corium major fibre bundles with less interweaving, a higher angle of weave and an increase in grain-to-corium major ratio in the full-grain leather.
These results indicate that weaner steers subjected to a winter or drought nutritional restriction will produce hides and leathers of the same yield and physical characteristics as nutritionally unrestricted animals provided restricted animals are subsequently exposed to high nutritional veld or feedlot conditions and slaughtered at an equivalent stage of growth or at equivalent live mass.En ligne : https://drive.google.com/file/d/1YHss08GC5a0eZArZ7TVwQNfOQaVkb0tN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9111
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 72 (Année 1988) . - p. 193-209[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007134 - Périodique Bibliothèque principale Documentaires Disponible