Accueil
Détail de l'auteur
Auteur Michaela Schröpfer
Commentaire :
FILK - Research Institute of Leather and Plastic Sheeting - Freiberg - Germany
|
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
Influence of elastin degradation on the mechanical properties of leather / Michaela Schröpfer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 9 (09/2014)
[article]
Titre : Influence of elastin degradation on the mechanical properties of leather Type de document : texte imprimé Auteurs : Michaela Schröpfer, Auteur ; Enno Klüver, Auteur ; Michael Meyer, Auteur Année de publication : 2014 Article en page(s) : p. 306-313 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Propriétés mécaniques
Elastine -- Détérioration
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The influence of elastin degradation in leather on important mechanical properties was investigated. The elastin content of pelts and wet blues was determined by chromatographic analysis of desmosine, which is a specific and hydrolytically stable crosslinking. Analysis of pelts was performed directly, while chrome containing samples had to be detanned prior to analysis. It is demonstrated that elastase significantly reduces the elastin content. In contrast to often assured statements on the marked influence of elastase on softness, area yield, tensile strength and elongation of leather, our investigations showed no significant changes in the mechanical properties of leather as well as area yield, grain quality or softness after treatment with elastase. It is concluded that the impact of elastin on leather properties is generally lower than postulated before or that it is not pronounced in the dry state. Note de contenu : - EXPERIMENTAL : Production of leather and enzyme treatment - Elastin analysis - Determination of chrome content - Mechanical tests
- RESULTS AND DISCUSSION : Analysis of elastin - Area measurement - Permanent elongation - Tensile strength - Loose grain and softnessEn ligne : https://drive.google.com/file/d/1fhGNRKKSK0nkup_ByHs7HYqJk7asw4Pp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21868
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 9 (09/2014) . - p. 306-313[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16485 - Périodique Bibliothèque principale Documentaires Disponible Leather stability in alternate climate conditions / Michaela Schröpfer in LEATHER INTERNATIONAL, Vol. 215, N° 4828 (03/2013)
[article]
Titre : Leather stability in alternate climate conditions Type de document : texte imprimé Auteurs : Michaela Schröpfer, Auteur ; Michael Meyer, Auteur Année de publication : 2013 Article en page(s) : p. 44-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Climat
Cuir -- Effets de la chaleur
Cuir -- Effets du climat
Cuirs et peaux -- Détérioration
Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux -- Propriétés mécaniques
Stabilité dimensionnelleIndex. décimale : 675 Technologie du cuir et de la fourrure En ligne : https://drive.google.com/file/d/16H1jWezcmm0Xc50i6M2lBUORgOQ4CWbn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17981
in LEATHER INTERNATIONAL > Vol. 215, N° 4828 (03/2013) . - p. 44-48[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14868 - Périodique Bibliothèque principale Documentaires Disponible The odor of leather / Michaela Schröpfer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 3 (03/2013)
[article]
Titre : The odor of leather Type de document : texte imprimé Auteurs : Michaela Schröpfer, Auteur ; M. Czerny, Auteur ; H. Schulz, Auteur ; P. Schieberle, Auteur Année de publication : 2013 Article en page(s) : p. 94-107 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse sensorielle
Chromatographie en phase gazeuse
Composés aromatiques
Cuir
Cuir -- Odeurs
Dilution
Extraction (chimie)
Olfactométrie
Spectrométrie de masseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather has a typical odor that varies depending on the type of leather. Whereas many other materials should preferably be odorless, a typical leather odor is desired. It is an important quality feature. So far the compounds causing the leather odor could not be clearly defined. For this research work, different leathers from different application areas were chosen. Depending on the manufacturing technology the leathers showed different nuances of leather odor. Published herein are the results from analysis of leathers by Gaschromatography-Odorimetry (GC-O), Aroma-extract-dilution analysis (AEDA), Gas chromatography-Mass-Spectrometry (GC-MS) and Stable-Isotope-Dilution-Analysis (SIDA) for identifying and quantifying substances accountable for certain leather odors. Furthermore, it points out from which stages of leather manufacturing the leather odor originates and if it can be influenced. Alternative methods for identification and quantification of substances relevant to odor are discussed regarding their significance. Note de contenu : EXPERIMENTAL :
- Leather selection
- Isolation of volatile substances : Solvent extraction - Headspace extraction - Aroma-extract-diluaion analysis (AEDA) - Aroma-dilution-analysis (ADA)
- Identification of key odorous substances : Capillary gas chromatography/odorimetry (GC-O) - Capillary gas chromatography/mass spectrometry (GC/MS) - Two-dimensional GC/MS (TDGC/MS) - Identification and structure clarification
- Quantification of key odorous substances (SIDA)
- Sensory examination : Triangle tests
- Aroma profile analysis
- Determination of the odor threshold in gelatin
- Simulation of the leather odor
- Sample preparation - Development of rapid tests : Headspace - External enrichment and thermal desorption of volatile compounds - Capillary gas chromatography/mass spectrometry (GC/MS) development of rapid tests
RESULTS :
- Sensory comparison of the leathers examined
- Identification of the odorous substances in leather and their contribution to the odor
- Simulation of the leather odors
- Influence of production processes on the leather odor
- Examination of the influence of leather additives on leather odorous substances
- Development of emission-analytical rapid methods for assessing the leather odorEn ligne : https://drive.google.com/file/d/1NkYrREPt54OGIZelY_YGABedgRUBooCt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17732
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 3 (03/2013) . - p. 94-107[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14787 - Périodique Bibliothèque principale Documentaires Disponible