A comparison of electrical methods with chemical methods for the analysis of pickled hides / Helen A. Gruber in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXIX (Année 1974)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXIX (Année 1974) . - p. 396-409 Titre : A comparison of electrical methods with chemical methods for the analysis of pickled hides Type de document : texte imprimé Auteurs : Helen A. Gruber, Auteur ; Edward F. Mellon, Auteur ; Howard W. Jones, Auteur Année de publication : 1974 Article en page(s) : p. 396-409 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acidité Calcium Cendres Chlorures Cuirs et peaux -- Analyse Electrochimie pH Picklage Le 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 d'ammonium Sulfates Le sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Analyses for chloride, sulfate, total acid, calcium, and ammonia were performed on commercially prepared pickled hides and their expressed liquors by chemical and electrochemical methods. Data obtained with well equilibriated hides showed that specific ion electrodes, where available, gave values that reflected accurately the analyses obtained by chemical methods. Electrodialysis measurements gave the total electrolyte content. Note de contenu : - Moisture and ash determination - Determination of pH - Determination of chlorides - Determination of sodium - Determination of ammonium salts - Determination of total sulfates - Determination of acidity - Determination of calcium - Electrodialysis of expressed liquor and hide samples En ligne : https://drive.google.com/file/d/1YRyBWKGlnH50usxqvRM7tfo9v_1ruxvR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41372 [article]

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Examination of moderately halophilic bacteria / Meral Birbir in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 5 (09-10/2021)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 5 (09-10/2021) . - p. 231-241 Titre : Examination of moderately halophilic bacteria Type de document : texte imprimé Auteurs : Meral Birbir, Auteur ; Kubra Kizilkaya, Auteur ; Pinar Caglayan, Auteur Année de publication : 2021 Article en page(s) : p. 231-241 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bactéries -- Comptage Bactéries halophiles Cendres Cuirs et peaux -- Conservation Cuirs et peaux -- Microbiologie Humidité Peaux brutes -- Salage pH Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The salt curing process may cause contamination of skin with micro-organisms found in the salt. Moderately halophilic bacteria are among the dominant halophilic micro-organisms which adversely affect skin quality. Therefore, the study was focused to examine prevalence and total numbers of aerobic bacteria, moderately halophilic bacteria, proteolytic and lipolytic moderately halophilic bacteria in curing salt samples and examine coiony characteristics and biochemical reactions of moderately halophilic bacteria. Twenty-five salt sampies that are used in the preservation of hides and skins were collected from different leather factories in Corlu (20 salt sampies) and Tuzla (5 salt samples) Leather Organized Industrial Zones in Turkey. The pH, ash and moisture values of the salt sampies were respectively determined as between 6.60-7.95, 90%-96%, 2.1%-2.9%. The total numbers of aerobic bacteria, moderately halophilic bacteria, proteolytic and lipolytic moderately halophilic bacteria in the sampies were detected as 2-70 CFU/g, 1-13 CFU/g, 1-13 CFU/g and 1-4 CFU/g, respectively. Ninety-five moderately halophilic bacterial isolates were recovered from the salt sampies. Three, thirteen, seventeen, fifty-six, two, four, five percent of the bacterial colonies were dark yellow, pink, white, cream, beige, dark cream and yellow, respectively. Seventy-nine, sixteen, four and one percent of the bacterial colonies were found as circuiar, punctiform, irregular and rhizoid, respectively. Sixty-six, thirty-four, forty-five and fifty-five percent of the isolates were Gram-positive, Gram-negative, cocci-shaped, and rod-shaped cells. Fifty-four and thirty-eight percent of the isolates were motile and endospore-forming bacteria, respectively. Ail isolates grew on complex agar media containing 3-15% NaCI (w/v) concentration but did not grow on complex agar medium without NaCI and complex agar medium with 30% NaCI. White optimal growth of eighty-two percent of the isolates were observed at Complex agar medium with 10% NaCI, eighteen percent of isolates exhibited optimal growth at Complex agar medium with 10-15% NaCI. All isolates were catalase-positive. Sixty-one, seventy-four, twenty-five, sixty percent of the isolates produced oxidase, protease, lipase, and amylase enzymes, respectively. Thirty-three of percent of the isolates produced ammonia from peptone. ln conclusion, ail salt sampies contained moderately halophilic bacteria, 92% and 48% of salt samples comprised respectively proteolytic and lipolytic moderately halophilic bacteria. Therefore, destructive moderately halophilic bacteria in each salt should be removed using antimicrobial applications before curing process to prevent damage to the salted hides and skins during storage. Note de contenu : - Salt samples - Determination of pH values, moisture and ash contents of salt samples - Determination of numbers of aerobic bacteria, moderately halohilic bacteria, proteolytic moderately halophilic bacteria and lipolytic moderately halophilic bacteria in salt samples - Biochemical ativities of moderately halophilic bacterial isolates - Table 1 : The pH values, ash contents, moisture content, total counts of aerobic bacteria and moderately halophilic bacteria of the salt samples - Table 2 : Bacterial colony characteristics of pure moderately halophilic bacterial isolates - Table 3 : Biochemical test results of moderately halophilic bacterial isolates En ligne : https://drive.google.com/file/d/1fiuvgEaAYneIoA1jwQhL4a7iKewvC3nP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36349 [article]

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Matériaux verre à base de déchets pour renforts / Christophe Angelloz in TEXTILES A USAGES TECHNIQUES (TUT), N° 50 (4e trimestre 2003)  

[article]  inTEXTILES A USAGES TECHNIQUES (TUT) > N° 50 (4e trimestre 2003) . - p. 28-30 Titre : Matériaux verre à base de déchets pour renforts Type de document : texte imprimé Auteurs : Christophe Angelloz, Auteur Année de publication : 2003 Article en page(s) : p. 28-30 Langues : Multilingue (mul) Catégories : Cendres Composites à fibres de verre Mélanges (chimie) Nontissés Recyclage (déchets, etc.) Substances dangereuses -- Elimination Textiles et tissus à usages techniques Index. décimale : 677.4 Textiles artificiels Résumé : Les cendres volantes produites par les usines d'incinération de déchets posent un réel problème économique car elles contiennent des métaux lourds. Elles sont généralement stockées en décharges classée, après une coûteuse neutralisation. Une solution consiste à les mélanger à d'autres déchets solides, de les vitrifier et de les extruder sous forme de fibres par le procédé WBRM. Elles sont alors exploitables sous forme de tissés et de nontissés (isolation, renforts de composite, etc.). Note de contenu : - Le procédé WBRM - Avantages économiques - Textiles et nontissés - Matériaux composites renforcés en fibres de verre FIGURES ET TABLEAUX : 1. Fibres WBRM fibres reinforced polyester - 2. Comparison de fibres WBRM et de fibres de verre E - 3. Caractéristiques des échantillons soumis à essai - 4. Tests en flexion selon EN 63 - 5. Nontissé WBRM En ligne : https://drive.google.com/file/d/1IYMLiu8yPTyeIr75d92EyYNCIdCTawWY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29931 [article]

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A novel adsorption method to simulate the dirt pickup performance of organic coatings / Shuxue Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 1 (01/2018) . - p. 175-184 Titre : A novel adsorption method to simulate the dirt pickup performance of organic coatings Type de document : texte imprimé Auteurs : Shuxue Zhou, Auteur ; Yang Yang, Auteur ; Tao Wang, Auteur ; Hongyu Chen, Auteur ; James Bohling, Auteur ; Alvin M. Maurice, Auteur ; Limin Wu, Auteur Année de publication : 2018 Article en page(s) : p. 175-184 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption Cendres Cendres de riz et constituants Essais (technologie) Méthyltriméthoxysilane Résistance à la salissure Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The evaluation of the dirt resistance of organic coatings according to traditional accelerated methods (e.g., the standard method GB/T 9780-2013 in China) usually provides results which deviate from their real-world performance in seriously polluted environments. As an alternative, a novel adsorption method with methyltrimethoxysilane-modified rice-straw ash as the artificial dirt standard was proposed in this paper. With this method, the ash was dispersed into the air in a testing chamber and then allowed to physically adsorb to the coating, which is believed to more accurately simulate the adsorption behavior of floating particulates outdoors. Two groups of latex coatings from Dow Chemical Company were employed to evaluate the adsorption method by monitoring the changes in color, whiteness, and reflectivity. In parallel, outdoor exposure testing of these coatings was conducted. The influences of charging method, of ash type, and panel position on the testing results were carefully investigated. Multicharging of ash (9 g × 3) and parallel panels at different positions in the testing chamber are designed for the generation of repeatable results. It was demonstrated that the adsorption method basically matched the outdoor exposure results and was more predictive of real-world results than GB/T 9780-2013. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of standard dirt - Testing apparatus and method - Outdoor exposure testing - Characterization - RESULTS AND DISCUSSION : Preparation of standard dirt - Influence of the type of dirt - Influence of charging method of ash - Influence of testing panel position - Examination of the repeatibility of adsorption method - The feasibility of adsorption method DOI : 10.1007/s11998-017-9971-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9971-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30110 [article]

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Using ashes from incineration of chromium sulphate tanned leather scrap. Part 2 : Tanning liquors, additives in footwear adhesives and fillers in mortars / M. J. Ferreira in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 6 (11-12/2001)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 6 (11-12/2001) . - p. 193-198 Titre : Using ashes from incineration of chromium sulphate tanned leather scrap. Part 2 : Tanning liquors, additives in footwear adhesives and fillers in mortars Type de document : texte imprimé Auteurs : M. J. Ferreira, Auteur ; E. Xara, Auteur ; M. F. Almeida, Auteur ; M. Barla, Auteur ; J. Ferrer, Auteur Année de publication : 2001 Article en page(s) : p. 193-198 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs -- Additifs Caractérisation Cendres Charges (matériaux) Chrome Cuirs et peaux -- Déchets -- Recyclage Mortier -- Additifs Récupération (Déchets, etc.) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chromium is the basis of leather manufacture and its extractable reserves are limited in distribution. mainly in South Africa. Zimbabwe and ex-USSR countries. Almost 20% of the metal is used by the chemical industry where one third of it goes into leather production as chromium sulphate tanning agent. The European Union depends on chromium imports as for most other metals. After burning leather scrap tanned with chromium sulphate. the very rich chromium resulting ashes may contain chromium (VI) in such a concentration that it becomes a hazardous waste and needs careful handling. 23Thus. both economic and environmental reasons suggest the use of these ashes. This paper follows another 4in presenting some of the work carried out under CRAFT project BRST CT96-5085. where leather incineration ashes generated by two different pilot—combustion systems, respect ively a fixed grill incinerator (FGI) and a fluidized bed incinerator (FBI) were characterized and some alternatives for using those ashes were studied. In the previous paper two routes for recovering chromium from leather ashes were considered as well as the influence of some factors on their efficiency. Now, producing chromium sulphate tanning liquors with chromium leached from the ashes is considered, as well as some other alternatives of using those ashes, namely as additives in footwear adhesives and fillers in mortars. Note de contenu : - Characterization of ashes - Application of recovered chromium in the leather industry as tanning agent - Application of ashes in footwear adhesives - Application of ashes as a filler in mortars - Table 1 : Chemical characteristics of leathers tanned using a 50/50 mixture of commercial and FBI ash derived liquor - Table 2 : Physical characteristics of leathers tanned using a 50/50 mixture of commercial and FBI ash derived liquor - Table 3 : Characteristics of leathers tanned using a 50/50 mixture of commercial and FGl ash derived liquor - Table 4 : Characteristics of leathers tanned using a 75/75 mixture of commercial and FGI ash derived liquor - Table 5 : Type of failure of leather adhesive bonding - Table 6 : Heavy metals in the leachates from ashes and mortars DIN 38414-S-4 tests and Photobacterinin Phosphoreum toxicity En ligne : https://drive.google.com/file/d/1g9VcBCydqP4pVFRkAKVhOvYQeHtRAxJg/view?usp=drive [...] Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40213 [article]

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Wear performance of value-addition epoxy/breadfruit seed shell ash particles and functionalized momordica angustisepala fiber hybrid composites / Vincent C. Ezechukwu in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 5-6 (12/2020)  

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