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Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
[article]
Titre : Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather Type de document : texte imprimé Année de publication : 2023 Article en page(s) : p. 148-157 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de Poissons
Essais de résilience
Essais dynamiques
Peau -- Histologie
Retannage
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Mechanical tensile and tear tests are used for qualitatively evaluating leather. The tests express the physical response of the tanned collagen fibre bundles subjected to stretching. Unlike mammals, the collagen fibre bundles in fishskins form overlapping layers, oblique to each other. This arrangement can influence the mechanical behaviour of the material and, therefore, must be taken into account when establishing the specimenʼs directions. Despite this peculiarity and due to the absence of specific technical norms for the position and preparation of specimens for testing, qualitative research with fish leather has used parameters established for mammals. Thus, this study aimed to verify the influence of the collagen fibre bundle arrangement as observed by scanning electron microscopy (SEM), on the qualitative aspects of Nile Tilapia (Oreochromis niloticus) leather. The skins were tanned with chrome, associated with oxazolidine. Tilapia leathers were analysed for their physical-mechanical properties, adopting cut directions of parallel, perpendicular, dorsal-ventral and ventral-dorsal, all with reference to the Tilapia cephalocaudal axis. Skin and leather evaluation through scanning electronic microscopy (SEM) revealed layers with continuous fibres bundles interspersed by layers of continuous fibres arranged in an oblique direction. The data revealed no statistical difference for the side (right and left) from which the specimens were taken. However, different behaviours of tensile strength, percentage elongation, and tear strength were observed. The tensile strength of the orange-brown leather was higher for the perpendicular direction and lower for cutting in the parallel direction. Regarding stretching, the parallel cut presented the highest value, lower for the dorsal-ventral and ventral-dorsal cuts. As for tear strength, higher values, were observed for the perpendicular and ventral-dorsal cuts. Results showed the influence of skin organisation on leather resistance and the need for method standardisation, elaborating specific norms for the qualitative evaluation of fish leather. Note de contenu : - MATERIAL AND METHODS
- RESULTS AND DISCUSSION : Proximate composition of Tilapia skin - Histological Tilapia skin analysis - Scanning Electron Microscopy (SEM) of Tilapia leather - Qualitative properties of Tilapia leather -
- Table 1 : Technical dagta of reagents used in Tilapia skin tanning process
- Table 2 : Pre-tanning process conditions of Tilapia skin
- Table 3 : Tanning process conditions of Tilapia skin
- Table 4 : Retanning process conditions of Tilapia leather
- Table 5 : Proximate composition of Tilapia skin
- Table 6 : Data on tensile strength, percentage of elongation and tear strength of dark brown Tilapia leather
- Table 7 : Data on tensile strength, percentage of elongation and tear strength of orange-brown Tilapia leatherEn ligne : https://drive.google.com/file/d/1j9G655gXEqUbT4gfDS_f3N6YBWNyVNs7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39689
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 148-157[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24155 - Périodique Bibliothèque principale Documentaires Disponible Influencing the cutaneous carotenoid status and skin-physiological parameters by ingesting antioxidants in the form of curly-hale containing food supplements / J. Schleusener in SOFW JOURNAL, Vol. 144, N° 9 (09/2018)
[article]
Titre : Influencing the cutaneous carotenoid status and skin-physiological parameters by ingesting antioxidants in the form of curly-hale containing food supplements Type de document : texte imprimé Auteurs : J. Schleusener, Auteur ; Ceylan K. Nowbary, Auteur ; Maxim E. Darvin ; Silke Barbara Lohan ; Martina C. Meinke Année de publication : 2018 Article en page(s) : p. 2-9 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge
Antioxydants
CaroténoidesLes caroténoïdes sont des pigments plutôt orange et jaune répandus chez de très nombreux organismes vivants. Liposolubles, ils sont en général facilement assimilables par les organismes. Ils appartiennent à la famille chimiques des terpénoïdes, formés à partir de la polymérisation d'unités isoprènes à structure aliphatique ou alicyclique. Il est généralement admis qu'ils suivent des voies métaboliques similaires à celles des lipides. Ils sont synthétisés par toutes les algues, toutes les plantes vertes et par de nombreux champignons et bactéries (dont les cyanobactéries).
Collagène
Compléments alimentaires
Cosmétiques
Elasticité
Evaluation
Humidité
Mesure
Peau -- Rides
Peau -- Soins et hygiène
Spectroscopie de réflectance
StatistiqueIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Antioxidants are important radical scavengers protecting the body from the consequences of oxidative stress. They have to
be ingested by food rich in fruits and vegetables or by food supplements. The effects of the intake of curly-kale containing food supplements on the skin are described in this paper. For this purpose, verum and placebo groups had been investigated for several months noninvasively in vivo by determining their cutaneous antioxidative status, their collagen-to-elastin index of the dermis, and various age-related skin parameters. While in the verum groups the cutaneous antioxidative status and the skin moisture increased significantly, only small changes were found in the placebo groups. The collagen content in the skin of the verum group showed a tendency towards increasing.
Besides a healthy nutrition, a selected supplementation consisting of low-dosed natural carotenoids at a phyllogical concentration can improve the antioxidative capacity of the skin, thus counteracting an age-related degradation of collagen I in the dermis.Note de contenu : - METHOD : Multiple spatially resolved reflectance spectroscopy (MSRRS) - Collagen-to-elastin index of the dermis (SAAID) - Wrinkle measurement - Elasticity - Skin moisture - Study design - Statistical evaluation
- RESULTS : Spatially resolved reflectance spectroscopy (MSRRS) - Collagen-to-elastin index of the dermis (SAAID) - Measurement of wrinkles - Elasticity - Skin moistureEn ligne : https://drive.google.com/file/d/13kmnwiC8XwELAzVPqsddjrkuyRTQHp-Q/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30951
in SOFW JOURNAL > Vol. 144, N° 9 (09/2018) . - p. 2-9[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20161 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Ingestible beauty Type de document : texte imprimé Auteurs : Sandra Schulze, Auteur Année de publication : 2020 Article en page(s) : p. 12-13 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antioxydants
Astaxanthine
Collagène
Cosmétiques
Elasticité
Hyaluronique, acideL'acide hyaluronique est un type de polysaccharide (plus précisément une glycosaminoglycane) non fixé à une protéine centrale et largement réparti parmi les tissus conjonctifs, épithéliaux et nerveux animaux.
Il se trouve notamment dans l'humeur vitrée et le liquide synovial. Il est l'un des principaux composants de la matrice extracellulaire ainsi que de certaines mucoprotéines lorsqu'il est associé à une fraction protéique.
Depuis les années 1990, il est très utilisé dans divers dispositifs médicaux, médicamenteux et cosmétiques (présenté dans ce dernier cas comme "antistatique, humectant, hydratant, conditionneur cutané, anti-âge, etc."), bénéficiant d'un effet de mode grandement soutenu par une large publicité commerciale.
Contribuant de façon significative à la prolifération et à la migration des cellules, l'acide hyaluronique est aussi impliqué dans la progression de certains cancers. (Wikipedia)
Hydratation
Nutrition
Peau -- Soins et hygiène
PeptidesIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The body’s largest organ, the skin, is one that requires a lot of nourishment and care. Topical skin care applications still have their appeal, but ingestible beauty products are on the fast track. More than ever, the link between nutrition and skin conditions is obvious to consumers. If you provide your body with the right nutrients and create a healthy internal environment, it will show on the outside. Increasing interest from younger consumers keen to preserve their natural youth is a major driver behind the category’s growth. Similarly, the ever-growing ageing population wants to retain a youthful appearance into later life, thus contributing to the demand for high quality beauty ingredients. According to Innova Market Insights, the key trends in new product development are evidence of efficacy, naturality of ingredients and their ability to be multifunctional. Clearly, this creates opportunities for many ingredients. The following article will focus on three main targets for healthy skin: antioxidant protection, elasticity and moisture retention. Note de contenu : - The antioxidant power of astaxanthin
- Protecting underlying structures
- Collagen peptides : the secret - beauty boosters
- Maintaining moisture with hyaluronic acid
- Market domination for science-backed skin care ingredients
- Emerging evidence
- Fig. 1 : Haematococcus pluvialis algae under the microscopy
- Fig. 2 : Influence of collagen in the skin layersEn ligne : https://drive.google.com/file/d/1_gbPVTr08pANBOzFKxt-O9XxG0C5S6vi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34622
in SOFW JOURNAL > Vol. 146, N° 9 (09/2020) . - p. 12-13[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21951 - Périodique Bibliothèque principale Documentaires Disponible Interaction mechanism of collagen peptides with four phenolic compounds in the ethanol-water solution / Xian Liu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)
[article]
Titre : Interaction mechanism of collagen peptides with four phenolic compounds in the ethanol-water solution Type de document : texte imprimé Auteurs : Xian Liu, Auteur ; Xia Li, Auteur ; Zhangjun Huang, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2021 Article en page(s) : 9 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool
Collagène
Composés organiques volatils
Dynamique moléculaire
Eau
Peptides
PhénolsIndex. décimale : 547 Chimie organique : classer la biochimie à 574.192 Résumé : This study demonstrated the interaction mechanism of collagen peptides (CPs) with 4-ethylphenol (4-EP), phenol, guaiacol, and 4-ethylguaiacol (4-EG) in the ethanol-water solution. The ultraviolet visible spectroscopy, zeta potential tests and hydrogen nuclear magnetic spectroscopy manifested that CPs interacted with the phenolic compounds. Meanwhile, Isothermal titration calorimetry determination indicated that the CPs was hydrogen bonded with 4-EP in 52 %(v/v) ethanol-water solution, while the hydrophobic forces played a major role in the interaction of CPs with guaiacol and 4-EG, respectively. Moreover, hydrogen and hydrophobic bonds were involved in the interaction between CPs and phenol. Finally, Head Space-solid Phase Microextraction Gas Chromatography Mass Spectrometry analysis indicated that the content of phenolic compounds in model solution efficiently decreased with the presence of CPs. In the real liquor, it was found that the content of volatile compounds (including phenolic compounds) was obviously decreased after CPs added. Note de contenu : - MATERIALS AND METHODS : Material - UV-Vis measurements - Zeta potential determination - 1H NMR spectroscopy analysis - ITC detection - Solid-phase microextraction (SPME) - Gas chromatography-mass spectrometry (GC-MS) analysis - Statistics
- RESULTS AND DISCUSSION : The Interaction between CPs and phenolic compounds in the ethanol-water solution - 1H NMR analysis - Thermodynamic parameters between CPs and phenolic compounds in the ethanol-water solution by ITC - The content of phenolic compounds in the ethanol-water solution - The content of volatile compounds in light-flavor types baijiu
- Table 1 : Thermal parameters of collagen peptides reacted with phenolic compounds in 52 % ethanol-water solution
- Table 2 : Effect of CPs on the content of phenolic compounds in the volatile components in 52 % ethanol-water solution as determined by HS-SPME-GC-MS
- Table 3 : Effect of CPs on the content of volatile compounds in light-flavor types baijiu as determined by HS-SPME-GC-MSDOI : https://doi.org/10.1186/s42825-021-00065-0 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00065-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37548
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 9 p.[article]Introduction of intra- and inter-molecular cross-bonds by mono and bifunctional sulphonyl chlorides in soluble collagen / M. S. Olivannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
[article]
Titre : Introduction of intra- and inter-molecular cross-bonds by mono and bifunctional sulphonyl chlorides in soluble collagen Type de document : texte imprimé Auteurs : M. S. Olivannan, Auteur ; Y. Nayudamma, Auteur Année de publication : 1976 Article en page(s) : p. 12-15 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de sulfonyle
Collagène
Dissolution (chimie)
Electrophorèse
Réticulation (polymérisation)
ViscositéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen was treated with different sulphonyl chlorides and some of the physico-chemical properties of the modified collagen such as viscosity, dissolution temperature and polyacrylamide disc electrophoretic pattern were studied. The monofunctional sulphonyl chlorides increased the viscosity of the collagen solution, probably due to aggregation of molecules facilitated by hydrophobic bonds. However, the very high viscosity observed in the case of disulphonyl chlorides with collagen indicates that inter-molecular cross-links are formed with these reagents. From dissolution temperatures and polyacrylamide gel electrophoretic patterns, it is considered that disulphonyl chlorides can introduce intra- and inter-molecular cross-links in collagen under suitable conditions. Note de contenu : - EXPERIMENTAL : Preparation of soluble collagen - Treatment of soluble collagen with various sulphonyl chlorides - Viscosity measurements - Dissolution temperature - Acrylamide gel electrophoresis
- RESULTS AND DISCUSSION : Viscosity - Dissolution temperature - Polyacrylalide gel electrophoresis
- Table 1 : Relative viscosity of collagen treated with sulphonyl chlorides
- Table 2 : Dissolution temperature of collagen treated with sulphonyl chlorides
- Fig. 1 : Disc electrophoresis sub-unit patterns of collagen
- Fig. 2 : Dis electrophoresis and sub-unit patterns of collagen
- Fig. 3 : Disc electrophoresis sub-unit patterns of collagenEn ligne : https://drive.google.com/file/d/1E2O7vmxkPNuTmBItAYrXh0FY7EQJ677n/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35259
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60 (Année 1976) . - p. 12-15[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008596 - Périodique Archives Documentaires Exclu du prêt Investigation of the interaction between epoxides and collagen in epoxy tanning based on BDDGE cross-linked collagen solution / Yuanzhi Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 8 (08/2020)
PermalinkInvestigation of the solubility and dispersion degree of calf skin collagen in ionic liquids / Sicong Liu in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 1 (Année 2019)
PermalinkIsolation and characterization of phosphoric acid-soluble collagen from leather wastes of pig breed bulgarian white / I. Chakarska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)
PermalinkLeather retanning performance of carboxylated collagen fibres containing adsorbed Cr(III) / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
PermalinkLeather solid waste : a review. A low cost adsorption material based on collagen fibre / Qiang Taotao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 3 (05-06/2016)
PermalinkManipulating chemical reactivity of collagen in tannery processing / David Rabinovitch in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 11 (11/2009)
PermalinkMasse moléculaire du collagène / Pierre Manhès / 1966
PermalinkMatrix proteins of the papillary dermis - Primary targets of intrinsic dermal aging ? / David Boudier in IFSCC MAGAZINE, Vol. 11, N° 3 (07-08/2008)
PermalinkMechanism of collagen processed with urea determined by thermal degradation analysis / Keyong Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 10 (10/2020)
PermalinkModelling the solubility of films prepared from collagen hydrolysate / Pavel Mokrejs in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)
PermalinkModification of chrome-tanned leather waste hydrolysate with epichlorhydrin / F. Langmaier in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 1 (01-02/2006)
PermalinkModification of collagen fibre and clean chrome tanning technology using low temperature plasma / Yang Jinwei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 6 (11-12/2012)
PermalinkModification of collagen hydrosylate be edac / Keyong Tang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 1 (01-02/2008)
PermalinkModified smart collagen biomaterials for pharmacy and adhesive applications / Ján Matyasovsky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 10 (10/2016)
PermalinkMolecular interactions between type I collagen and metal complex : from computational modelling to experimental characterisation / Xiao Shiwei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 4 (07-08/2018)
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