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Cosmetic product safety old friend or new foe ? / Stephen Kirk in PERSONAL CARE EUROPE, Vol. 5, N° 2 (04/2012)
[article]
Titre : Cosmetic product safety old friend or new foe ? Type de document : texte imprimé Auteurs : Stephen Kirk, Auteur Année de publication : 2012 Article en page(s) : p. 81-83 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques -- Toxicologie
Evaluation du risque
Ingrédients cosmétiquesTags : 'Enzymes protéolytiques' 'Facteurs croissance peptidiques' 'Inhibiteurs enzyme' Index. décimale : 668.5 Parfums et cosmétiques Résumé : The introduction of cosmetic ingredients with novel biological activities, such as proteolytic enzymes, peptide growth factors and enzyme inhibitors should be viewed as challenging the established dogma of the toxicological evaluation of cosmetic ingredients and finished products. In the case of peptide growth factors and enzyme inhibitors for example, in the absence of firm evidence to the contrary, perturbing such natural processes must surely be viewed as having potential negative effects on the normal homeostatic mechanisms of the skin. This is great challenge for the safety assessment of cosmetic ingredients and finished products in the 21 st century. Note de contenu : - Epidermal growth factor
- Enzyme 5-α reductase inhibitorsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14533
in PERSONAL CARE EUROPE > Vol. 5, N° 2 (04/2012) . - p. 81-83[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13834 - Périodique Bibliothèque principale Documentaires Disponible Examination of efficiency and sufficiency of salt-pack curing method / Emel Aslan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 3 (05-06/2011)
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Titre : Examination of efficiency and sufficiency of salt-pack curing method Type de document : texte imprimé Auteurs : Emel Aslan, Auteur ; Meral Birbir, Auteur Année de publication : 2011 Article en page(s) : p. 98-103 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Conservation Tags : Peau 'Méthodes conservation' 'Cristaux sel' 'Teneur humidité' cendres' 'Mesure pH' 'Prolifération bactérienne' 'Bactéries lipolytique' mésophiles' protéolytiques' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Conservation defects affect leather quality adversely and cause important economic losses. Therefore, the goal of this study was to evaluate hide quality by comparing important parameters of salt-pack cured hides and determine efficiency and sufficiency of the curing method in the areas both with and without salt crystals present on the hides. The areas with and without salt crystals on the salt-pack cured hide samples, (collected from different tanneries in the leather Organized Tannery Region, Tuzla-Istanbul-Turkey), were examined in terms of pH values, moisture and ash contents, brine saturations, total mesophile, proteolytic and lipolytic mesophile bacterial numbers. The pH values of the both areas of all the hide samples (6.3-7.4) were found to be optimum for bacterial growth. Moisture contents of the areas without salt crystals present on the hide samples (42-57 %). Ash contents and salt saturations of both types of area of all the hide samples (21-36 %) and 100 % respectively) were found to be the same as standard values. Although the hides were salt-pack cured, high numbers of mesophile, proteolytic and lipolytic mesophile bacteria were isolated from both areas of the hides. Mean values of the mesophile (2X10 7 c.f.u/g, 1.5 X 10 7 c.f.u./g). As a conclusion, due to an inadequately applied salt-pack curing process, this method was not a satisfactory method to prevent bacterial proliferation on hides. Hence, the traditional salt-pack curing method should be modified to improve the counter bacterial effect. Note de contenu : - Collection of the salt-pack cured hide samples from different tanneries
- Measurement of pH values of the areas with and without salt crystals of the salt-pack cured hides
- Moisture, ash and salt saturation of the areas with and without salt crystals of the salt-pack cured hides
- Examination of mesophilic, proteolytic and lipolytic mesophilic bacteria at the areas with and without salt crystals of the salt-pack cured hides.En ligne : https://drive.google.com/file/d/1g_fTb0FIPiCrFlfl4DmiG47O4D8ivFD2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11877
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 3 (05-06/2011) . - p. 98-103[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013132 - Périodique Bibliothèque principale Documentaires Disponible A novel system of removing décorin, a minor proteoglycan of bovine hides, to improve the quality of leather / Mila Aldema-Ramos in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 7 (07/2010)
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Titre : A novel system of removing décorin, a minor proteoglycan of bovine hides, to improve the quality of leather Type de document : texte imprimé Auteurs : Mila Aldema-Ramos, Auteur ; Cheng-Kung Liu, Auteur Année de publication : 2010 Article en page(s) : p. 222-228 Note générale : Bibliogr. Langues : Américain (ame) Tags : Décorine Protéoglycane 'Enzymes protéolytiques' 'Dépilage oxydant' 'Hydroxyde de sodium' Percarbonate Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Décorin is a minor proteoglycan (part protein and part carbohydrate) of the skin that is among the key components that undergo changes and removal during conversion of hides to leather. The majority of décorin removal takes place during the dehairing of hides, either traditionally with sodium sulfide or by an alternative oxidative dehairing procedure. The oxidative dehairing method using sodium hydroxide and percarbonate, developed by Marmer and Dudley, was utilized. Further removal of décorin by exposure to proteolytic enzymes during pretanning was explored to study the effects on the quality of leather. Additional removal of décorin was observed when an alkaline protease was added during the reliming stage and pepsin was added during the pickling stage in the pretanning treatments of the hides. More pronounced improvement in leather quality, due to more decorin removed, was observed in oxidatively dehaired hides than those dehaired traditionally with sulfides. As the décorin content decreased, the leather product became softer, more stretchable, and tougher than the control leather tanned without adding proteolytic enzymes. Employing the alternative oxidative dehairing process can solve the problem of sulfide toxicity to the environment while at the same time improving the quality of leather if co-treated with proteolytic enzymes. En ligne : https://drive.google.com/file/d/14VZuMQ8i3iqZCzOoCDlZAS4yC_aiNJQp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9721
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 7 (07/2010) . - p. 222-228[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012329 - Périodique Bibliothèque principale Documentaires Disponible