Effect of calcium in delimed hide on leather quality / Chao Lei in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 3 (03/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 3 (03/2023) . - p. 109-116 Titre : Effect of calcium in delimed hide on leather quality Type de document : texte imprimé Auteurs : Chao Lei, Auteur ; Xuyang Chen, Auteur ; Yunhang Zeng, Auteur ; Bi Shi, Auteur Année de publication : 2023 Article en page(s) : p. 109-116 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Confitage Le confitage est une action biochimique effectuée au moyen de produits enzymatiques, qui a pour but de dégrader les fibres élastiques, contribuant ainsi à augmenter la souplesse du cuir. En outre, les enzymes complètent la dégradation des résidus épidermiques, donnant ainsi une fleur plus propre et plus lisse. 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 -- Qualité Cuirs et peaux -- Teneur en calcium Déchaulage Opération consistant à débarrasser les peaux de la chaux et des substances alcalines qui leur ont été appliquées au pelanage. Post-tannage Tannage au chrome Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The efficient removal of calcium from delimed hide is essential to leather quality, but few reports have elaborated on how residual calcium in delimed hide affects leather quality. In this study, four delimed hides containing different calcium content were first prepared by using ammonium sulfate and sodium gluconate. Energy dispersive X-ray spectrometry results showed that the atomic percentages of calcium on the grain surfaces of the four delimed hides were 8.17%, 4.82%, 2.34%, and 0.25%, respectively. The bating, chrome tanning, and post-tanning performances of the four delimed hides were then analyzed to evaluate the effect of calcium in delimed hide on leather quality. Results showed that the removal efficiency of non-collagenous protein from hide in enzymatic bating, the evenness of chromium distribution, the shrinkage temperature of wet blue, and the physical properties of crust leather all increased as the calcium content of delimed hide decreased. Furthermore, efficient calcium removal from the grain surface of delimed hide played a key role in the color brightness and uniformity of wet blue and crust leather. The results draw our attention to the importance of considering the effectual removal of calcium from delimed hide for obtaining high-quality leather. Note de contenu : - EXPERIMENTAL : Materials - Deliming experiments and evaluation of deliming performance - Bating experiments and evaluation of bating performance - Tanning experiments and evaluation of tanning performance - Post-tanning experiments and evaluation of crust leather performance - RESULTS AND DISCUSSION : Preparation of delimed hides with different calcium contents - Effect of calcium in delimed hide on bating performance - Effect of calcium in delimed hide on chrome tanning performance - Effect of calcium in delimed hide properties of crust leather - Table 1 : Color parameters of the wet blue - Table 2 : Color parameters of the crust leathers - Table 3 : Physical properties of the crust leathers DOI : https://doi.org/10.34314/jalca.v118i3.6814 En ligne : https://drive.google.com/file/d/1n_-gOygNCeRyRRHTXA8LSWDtFa7g5kkf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39001 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23921	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Identification of gaps in knowledge and practices affecting the quality of skins/hides on the eve of Eid-ul-Adha in Pakistan / Sadaqat Ali Chattha in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 11 (11/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 11 (11/2023) . - p. 474-477 Titre : Identification of gaps in knowledge and practices affecting the quality of skins/hides on the eve of Eid-ul-Adha in Pakistan Type de document : texte imprimé Auteurs : Sadaqat Ali Chattha, Auteur ; Abdul Rehman, Auteur ; Agha Saiddain, Auteur ; Biyu Peng, Auteur Année de publication : 2023 Article en page(s) : p. 474-477 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Conservation Cuirs et peaux -- Industrie -- Pakistan Cuirs et peaux -- Qualité Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The 2nd largest export-oriented leather industry of Pakistan fulfills its 40% annual raw material demand during the eve of Eid-ul-Adha on which 6.0-8.0 million best-quality animals are being slaughtered within three days. However, a major portion of raw skins and hides (RSH) gets putrefied due to delayed preservation. The aim of this study was to explore the knowledge, attitude, and practices about RSH quality and its preservation in the general public from Punjab, Pakistan. A cross-sectional survey was conducted from February to May 2022 in which 948 individuals from 12 districts participated. Out of six, the overall mean knowledge score of the respondents about RSH preservation was 3.69±1.6 (61.5%). More than half (52.3%) of the respondents answered that salt could be an appropriate option to preserve RSH. However, contrary to their knowledge, only 4.2% (40/948) of respondents applied it correctly. About 56.6% of respondents donated RSH to religious institutes. The mean knowledge and practice scores of the respondents from rural areas were significantly higher (p<0.001) than those from urban areas (knowledge: 4.03 vs. 3.13; practice: 4.9 vs. 3.9). The knowledge and practice of preserving RSH using common salt application significantly increased (p<0.001) with the level of education (ORs: never attended school=0.08; schoollevel education=0.22 & College/University education=1.0). In conclusion, almost half of the respondents had knowledge about RSH preservation; however, only a few (4%) practiced it correctly. These findings will be helpful to design effective and targeted interventions to improve the knowledge and practices of the public for better RSH preservation. Note de contenu : - METHODOLOGY : Study area and data collection - Data analysis - RESULTS : Demographic characteristics of the respondents - Respondents' knowledge - Respondent's attitudes and practices - Association of demographic factors with knowledge and preservation practices - Association of demographic characteristics with identified practices - DISCUSSION : Knowledge related to RSH preservation - Attitude and preactices related to RSH preservation - Table 1 : Description of questions included in KAP survey along with correct and incorrect answers - Table 2 : Demographic characteristics of respondents, general questions, and resopnses to questions related to knowledge, attitude, and practices about raw skins/hides preservation - Table 3 : Linear regression model to find out the association of education and locality with knowledge and practice about RSH preservation - Table 4 : Summary of multivariable logistic regression model to find out the association of education and locality with identified practices - Table 5 : Per annum loss (million PKR) due to RSH wastage on the eve of Eid-ul-Adha - Table 6 : Per annum estimated expense (million PKR) to save RSH on the eve of Eid-ul-Adha DOI : https://doi.org/10.34314/jalca.v118i11.8241 En ligne : https://drive.google.com/file/d/1IR6brwNaC56oATm2OKlUhvR6h5iC3XbB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40046 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24291	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)