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Development of an alternative low salt bovine hide preservation using PEG and crude glycerol, Part II / Mila Aldema-Ramos in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 5 (05/2015)
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Titre : Development of an alternative low salt bovine hide preservation using PEG and crude glycerol, Part II : Mechanical properties of leather products Type de document : texte imprimé Auteurs : Mila Aldema-Ramos, Auteur ; Zerlina E. Muir, Auteur ; Joseph Uknalis, Auteur ; Joseph Trusello, Auteur Année de publication : 2015 Article en page(s) : p. 125-129 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure de sodium -- Suppression ou remplacement
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Analyse
Cuirs et peaux -- Conservation
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Séchage
Polyéthylène glycolIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : To obtain good quality leather products, the hides from which they are derived should be preserved properly while in storage and transit to prevent putrefaction. Current practice for hide preservation is salt curing via concentrated NaCl solutions. The objective of the current study is to develop alternative brining processes that require lesser amounts of salt and have no adverse effect on the resulting leather products. By incorporating a dehydrating agent such as polyethylene glycol polymers (PEG), only a fraction of the commonly used amount of salt is necessary (from about 50% to less than a 25% of the weight of raw hide) to generate an efficiently preserved hide. The scanning electron microscopic (SEM) images and mechanical properties of the resulting crust leather products were comparable to the control obtained from traditionally preserved hides. To compensate for the potential over drying and formation of very tight grain, a humectant such as glycerol (with sodium carbonate) was also included. The rehydration of the test preserved hides is completed in a shorter period of time because the amount of salt in the hides is already quite low. Considering the low cost in obtaining the crude glycerol and its positive effects on quality of leather, it is quite desirable as an ingredient in the new alternative less salt hide preservation. Note de contenu : - EXPERIMENTAL : Materials - Laboratory scale protocol for the alternative hide preservation - Chloride content determination - Tanning of cured hide pieces - Mechanical properties of the crust leather product - Scanning electron microscopy
- RESULTS AND DISCUSSION : Dehydration trends - Chloride content - Mechanical properties - Scanning electron microscopy of crust leatherEn ligne : https://drive.google.com/file/d/1p5EJIlK-GBoZiZ1RQkNCpDiVmroe4BCc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24052
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 5 (05/2015) . - p. 125-129[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17216 - Périodique Bibliothèque principale Documentaires Disponible Limiting microbial activity as an alternative approach of bovine hide preservation, Part I : Efficacy of developed formulations / Majher I. Sarker in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 7 (07/2019)
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Titre : Limiting microbial activity as an alternative approach of bovine hide preservation, Part I : Efficacy of developed formulations Type de document : texte imprimé Auteurs : Majher I. Sarker, Auteur ; Wilbert Long, Auteur ; Cheng-Kung Liu, Auteur Année de publication : 2019 Article en page(s) : p. 271-278 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure de sodium -- Suppression ou remplacement
Cuirs et peaux -- Conservation
Cuirs et peaux de bovins
Formulation (Génie chimique)
Hydratation
Microbiologie
Produits de conservation du cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The traditional wet salting technique of bovine hide curing requires 95% or more saturated brine solution which generates a huge amount of pollution and salinity in the form of total dissolved solids (TDS) and chlorides (Cl-) during leather processing. Therefore, much attention is currently placed on tanneries requiring reduction or eliminate the use of sodium chloride as a raw hide/skin preservative. For the preservation of hide it is essential to arrest microbial attack as the collagen-breaking enzymes called collagenase produced by the bacteria can cause serious degradation on hide which leads to the putrefaction of raw hide before converting them into leather. In this research effort, a number of formulas have been developed and evaluated for their efficacy in preserving bovine hide for 30 days or more. This attempt has been made to evolve a least chloride containing curing system for salinity abatement, where 35% saturated brine is used as the base solution. The developed formulations have been evaluated with better efficacy than the conventional technique on limiting bacterial growth, controlling yeast and mold during the storage period of cured hide. The alternative methods also offer quick rehydration of cured hide during leather processing and Airborne Ultrasonic scanning detects no detrimental impact on alternatively cured hides. Therefore, this new development is ideally suited for hide preservation through better protection of hide from microbial degradation and improved conservation of environment in compare to the traditional method. Note de contenu : - EXPERIMENTAL : Materials - Protocol for the alternative hide preservation - Effectiveness of the developed formulations in limiting microbial growth - Measurement of water activity (wa) and moisture content - Determination of bacterial colony count - Yeast and molds determination experiment - Airborne ultrasonic (AU) scanning - Rehydration of cured hides - Degradation assessment of cured hides
- RESULTS AND DISCUSSION : Efficacy analysis of the developed formulations - Water activity and moisture content - Bacterial colony count on cured hides - Yeasts and molds colony count on cured hides - Airborne ultrasonic testing of cured hides - Rehydration anlaysis - Physical changes of the cured hidesEn ligne : https://drive.google.com/file/d/1X2pm9-1GO3lbEGjTfI_g-3jik5QoP7iS/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32786
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 7 (07/2019) . - p. 271-278[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21086 - Périodique Bibliothèque principale Documentaires Disponible Limiting microbial activity as an alternative approach of bovine hide preservation part II : impact of developed formulations on leather quality and the environment / Majher I. Sarker in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 2 (02/2020)
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Titre : Limiting microbial activity as an alternative approach of bovine hide preservation part II : impact of developed formulations on leather quality and the environment Type de document : texte imprimé Auteurs : Majher I. Sarker, Auteur ; Hailemichael O. Yosief, Auteur ; Cheng-Kung Liu, Auteur ; Nicholas P. Latona, Auteur Année de publication : 2020 Article en page(s) : p. 34-62 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Bactéries -- Comptage
Bains de trempe -- Analyse
Chlorure de sodium -- Suppression ou remplacement
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Analyse
Cuirs et peaux -- Conservation
Cuirs et peaux -- Propriétés mécaniques
Peaux brutes -- SalageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Wet salting of bovine hide commonly utilizes 95% saturated salt solution or 40-50% salt (w/w) on raw hide weight for preservation. The salt used for the hide preservation ends up being in wastewater and generates enormous environmental pollution. To minimize the environmental pollution problem associated with the traditional method of hide preservation, alternative formulations containing antimicrobial agents and less amount of common salt (35% saturated brine) have been developed. The alternative formulations were found to be more effective in deterring microbial growth than the traditional formulation as demonstrated by the total aerobic bacterial count of the preserved hide soaking liquor. The effect of the newly developed formulations on leather quality was assessed by analyzing the mechanical properties, scanning electron microscopic images, grain pattern and organoleptic properties of the finished leather. The quality analysis of the crust leather revealed that, the leather panels produced from the traditionally and alternatively preserved hides were comparable. The environmental impact of the newly developed formulations was also evaluated by monitoring the leather processing effluents for the pollution indicators such as total solids (TS), total dissolved solids (TDS), chloride content, Chemical oxygen demand (COD) and Bio-Chemical oxygen demand (BOD). Overall, the environmental impact of the newly developed hide preserving formulation was less severe than the traditionally used formulation. Since the newly developed formulations did not affect the quality of the leather produced and their impact on the environments is minimum, they could be considered as viable options for combatting pollution problems associated with the traditional salt curing method. Note de contenu : - EXPERIMENTAL : Materials - Laboratory scale hide preservation protocol - Analysis of soaking liquor generated in leather processing - Aerobic bacterial count of the soaking liquor - yeast and molds colony count of soaking liquor - Measurement of TOC and COD in soaking liquor - BOD analysis of soaking liquor - Tanning operation of cured hides - Determination of leather quality - Microscopic leather surface analysis
- RESULTS AND DISCUSSION : Effect of the developed formulations on limiting bacterial growth - Effect of the developed formulations on limiting yeasts and molds - Determination of chloride content - Measurement of TOC and COD in soaking liquor - Determination of BOD in soaking liquors - Determination of solid pollutants in soaking liquors - Quality analysis of crust leather - Grain surface analysis of leather - Surface analysis of crust leather using Scanning Electron Microscope - Determination of mechanical properties of leather - Subjective test analysis of leatherDOI : https://doi.org/10.34314/jalca.v115i2.1485 En ligne : https://drive.google.com/file/d/1EJfqdxzrT-84_y8P0ZCjrYFjq3VPFK1g/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33891
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 2 (02/2020) . - p. 34-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21627 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Lite Hide : une alternative au sel pour le transport des peaux ? Type de document : texte imprimé Auteurs : Maxime Jouineau, Auteur Année de publication : 2022 Article en page(s) : p. 20-21 Langues : Français (fre) Catégories : Chlorure de sodium -- Suppression ou remplacement
Eau -- Consommation -- Réduction
Peaux brutes -- Salage
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
sels -- RéductionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : CTC a testé un nouveau procédé, visant à conserver les peaux sur pickle séché. Nous vous présentons les résultats obtenus. En ligne : https://drive.google.com/file/d/1A4Zssfz2tkNOyzmNfEnCZV3HpP9BUa0W/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38647
in CTC ENTREPRISES > (12/2022 - 01/2023) . - p. 20-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23797 - Périodique Bibliothèque principale Documentaires Disponible Low salt preservation of Australian and New Zealand sheepskins in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 4 (07-08/2019)
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Titre : Low salt preservation of Australian and New Zealand sheepskins Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 191-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Chlorure de sodium -- Suppression ou remplacement
Citrique, AcideL'acide citrique est un acide alpha hydroxylé de formule C6H8O7.
Il joue un rôle central dans le métabolisme de tous les organismes vivants et tient son nom de son origine; le citron.
L'acide citrique est biodégradable et n'est pas toxique pour l'homme ni pour l'environnement. Cependant, comme tout acide, il est irritant et peut provoquer des brûlures s'il entre en contact prolongé avec des muqueuses.
À pH physiologique, il est présent sous forme de sa base conjuguée, le citrate, qui est un chélateur de l'ion calcium dans le sang.
Cuir nappa
Cuirs et peaux -- Conservation
Cuirs et peaux de moutons
Oxalique, AcideL'acide oxalique de structure HOOC-COOH, l'acide éthanedioïque d'après la nomenclature officielle est le plus simple des acides dicarboxyliques aliphatiques. Le produit commercial est un dihydrate, HOOC-COOH,2H2O
Grâce à la liaison entre les deux groupes carboxyles, il est l'un des acides organiques les plus utilisés (pKA1 = 1,27 et pKA2 = 4,27) car il se décompose facilement en gaz (CO2, CO). Les anions de l'acide oxalique ainsi que les sels et esters sont connus sous le nom d'oxalates.
Encore appelé sel d'oseille, on le trouve à l'état naturel sous forme d'oxalate de potassium ou de calcium dans les racines et rhizomes de nombreuses plantes telles que l'oseille, la rhubarbe, la betterave et les plantes de la famille des oxalis. Les oxalates sont également présents dans l'urine animale et humaine. Ils forment aussi des composés minéraux dans les rognons de silex.
Produits de conservation du cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The current and long established methods for preserving skins in Australia and New Zealand are described. These methods use large amounts of sodium chloride plus combinations of up to three biocides which are not registered in the REACH regulations. This paper describes work carried out to develop a method of low salt preservation (LSP) with auxiliaries used widely in the food and beverage industries and this was achieved. Note de contenu : - INTRODUCTION : Background information on methods and science for preserving raw hides and skins - Removal of salt from effluent - Objective of this work
- EXPERIMENTAL PROCEDURES : Chemicals used - Pilot tannery trials in New Zealand - Bulk trials in NZ - Test methods - De-pickle process used for New Zealand processed LSP skins - Washing and bleaching wool removed after fellmongering
- RESULTS AND DISCUSSION : Trials with oxalic acid - Trial using dichlorophen - Pilot tannery trials using citric acid and alternative fungicides - Water contents of skins in New Zealand - On processing of NZ LSP skins into finished leather - Fellmongery and processing for nappa - LSP trials using Australian skinsEn ligne : https://drive.google.com/file/d/1vJedHkpFYQE3NG1UQAhyJC6hNMMsuR1a/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32799
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 4 (07-08/2019) . - p. 191-201[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21085 - Périodique Bibliothèque principale Documentaires Disponible De-oiled karanja cake as potential bio-aditive for low salt raw skin preservation / V. Brinda in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 5 (05/2020)
PermalinkPreservation of bovine hide using less salt with low concentration of antiseptic, Part I : effectiveness of developed formulations / Majher I. Sarker in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 1 (01/2018)
PermalinkSalinity : the elimination of salt from acid pickle / Richard Daniels in WORLD LEATHER, Vol. 18, N° 3 (05/2005)
PermalinkSalt free preservation of raw goat skin using swietenia mahogany (seed) extract / Md. Abdur Razzaq in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 2 (02/2022)
PermalinkSodium chloride substitute for lower salt goat skin preservation : a novel approach / Abul Hashem in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 8 (08/2017)
PermalinkPermalinkSolutions alternatives pour la conservation des peaux / Thierry Poncet in CTC ENTREPRISES, N° 5 (06/2008)
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