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Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
[article]
Titre : Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 Type de document : texte imprimé Auteurs : H. A. Birkin, Auteur ; P. Elliott, Auteur ; C. Postles, Auteur ; A.-G. Marriott, Auteur ; R. L. Sykes, Auteur Année de publication : 1978 Article en page(s) : p. 55-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Archéologie
Bateaux -- Conception et construction
Coques (architecture navale)
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 -- Effets de la température
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de bovins
Essais de résilience
Evaluation
Immersion
Matériaux -- Imprégnation
Résistance à l'eau salée
Résistance à l'humidité:Résistance à l'eau
Résistance à la traction
Tanins végétaux
Technologie -- Moyen âgeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The paper is a descriptive account of work undertaken to re-create medieval leathers for use in an exercise in experimental archaeology—namely the Brendan voyage 1976-77. Leather for the boat's hull was made from oak-tanned ox hide impregnated with wool grease; it contained 35% dichloromethane extractables (IUC/4), had a water absorbtion (IUP/7) of 14% after 72 h, and resisted penetration by 3.5 % saline for more than 2000 h (IUP/1 1). The wooden frame was lashed together with alum tanned laces, which had a wet-breaking load of 45 kg. The transatlantic voyage of 4500 miles was completed in two stages and took 111 days (85 days at open sea), the hull leather retained its structural stability and initial water resistance. Note de contenu : - Developmment of the hull leather : Materials - Test programme - Results
- Verification of performance
- Table 1 : Performance of various dressed industrial leathers
- Table 2 : Effects of different impregnants on the dimensional stability and water resistance of various crust leathers
- Table 3 : Effect of drying sammed leagther under 10% linear extension on physical properties
- Table 4 : Range of test data obtained froom leathers used construction of the hull
- Table 5 : Performance of lace leathers
- Table 6 : Evaluation of hull leather which had endured the transatlantic crossing
- Fig. 1 : Projected route of Brendan voyage
- Fig. 2 : Schematic diagram of Brendan
- Fig. 3 : Effect of immersion time and temperature on apparent uptake of wool grease during static immersion. Dashed line shows fall in tensile strength with extended impregnation at 50°C
- Fig. 4 : Partly constructed hull, leather laces holding the frame are in the foreground ; a line of handstitching on the hull leather can be seen top left
- Fig. 5 : Brendan and crew shortly after launchingEn ligne : https://drive.google.com/file/d/1cgOTZjDf-45dcfFZvNyucyKSUuwzOvNo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35220
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 55-62[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008597 - Périodique Archives Documentaires Exclu du prêt Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 3 (05-06/1978)
[article]
Titre : Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 Type de document : texte imprimé Auteurs : H. A. Birkin, Auteur ; P. Elliott, Auteur ; C. Postles, Auteur ; A.-G. Marriott, Auteur ; R. L. Sykes, Auteur Année de publication : 1978 Article en page(s) : p. 55-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Archéologie
Bateaux -- Conception et construction
Coques (architecture navale)
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 -- Effets de la température
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de bovins
Essais de résilience
Evaluation
Immersion
Matériaux -- Imprégnation
Résistance à l'eau salée
Résistance à la traction
Tanins végétaux
Technologie -- Moyen âgeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The paper is a descriptive account of work undertaken to re-create medieval leathers for use in an exercise in experimental archaeology—namely the Brendan voyage 1976-77. Leather for the boat's hull was made from oak-tanned ox hide impregnated with wool grease; it contained 35% dichloromethane extractables (IUC/4), had a water absorbtion (IUP/7) of 14% after 72 h, and resisted penetration by 3.5 % saline for more than 2000 h (IUP/1 1). The wooden frame was lashed together with alum tanned laces, which had a wet-breaking load of 45 kg. The transatlantic voyage of 4500 miles was completed in two stages and took 111 days (85 days at open sea), the hull leather retained its structural stability and initial water resistance. Note de contenu : - Developmment of the hull leather : Materials - Test programme - Results
- Verification of performance
- Table 1 : Performance of various dressed industrial leathers
- Table 2 : Effects of different impregnants on the dimensional stability and water resistance of various crust leathers
- Table 3 : Effect of drying sammed leagther under 10% linear extension on physical properties
- Table 4 : Range of test data obtained froom leathers used construction of the hull
- Table 5 : Performance of lace leathers
- Table 6 : Evaluation of hull leather which had endured the transatlantic crossing
- Fig. 1 : Projected route of Brendan voyage
- Fig. 2 : Schematic diagram of Brendan
- Fig. 3 : Effect of immersion time and temperature on apparent uptake of wool grease during static immersion. Dashed line shows fall in tensile strength with extended impregnation at 50°C
- Fig. 4 : Partly constructed hull, leather laces holding the frame are in the foreground ; a line of handstitching on the hull leather can be seen top left
- Fig. 5 : Brendan and crew shortly after launchingEn ligne : https://drive.google.com/file/d/1cgOTZjDf-45dcfFZvNyucyKSUuwzOvNo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40488
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 62, N° 3 (05-06/1978) . - p. 55-62[article]The right solution ? / Deborah Smith in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4499 (04/2006)
[article]
Titre : The right solution ? Type de document : texte imprimé Auteurs : Deborah Smith, Auteur Année de publication : 2006 Article en page(s) : p. 40-43 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eau chaude
Essais d'adhésion
Immersion
Oligomères
Photoréticulation
Polycarbonates
Rayonnement ultraviolet -- Absorption
Réticulation (polymérisation)
StratifiésIndex. décimale : 667.9 Revêtements et enduits Résumé : New Acrylated Oligomers for UV/EB curing could provide effective transparent adhesion for the lamination of flexible and rigid polycarbonate substrates.
New acrylated oligomers have been developed for ultraviolet (UV) or electron beam (EB) curing lamination composed of flexible or rigid polycarbonate substrates. Example formulations using these new oligomers will be discussed along various adhesion test results including boiling water soak. Also UV transmission studies for polycarbonate substrates, adhered samples and samples subjected to boiling water soak will be included.Note de contenu : - A history
- Electromagnetic spectrum and photoinitiator selection
- Absorbance of UV energy through polycarbonatePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27584
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4499 (04/2006) . - p. 40-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004697 - Périodique Bibliothèque principale Documentaires Disponible Unhairing of bovine skin with fungal enzymes by immersion and spread throughout the epidermis / Maria Laura Garro in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 1 (01-02/2019)
[article]
Titre : Unhairing of bovine skin with fungal enzymes by immersion and spread throughout the epidermis Type de document : texte imprimé Auteurs : Maria Laura Garro, Auteur ; Betina Galarza, Auteur ; Carlos Greco, Auteur ; Roque Hours, Auteur Année de publication : 2019 Article en page(s) : p. 28-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Caractérisation
Cuirs et peaux de bovins
Diffusion (physique)
Enzymes fongiques
Epiderme
Epilage enzymatique
Immersion
Microscopie électronique à balayage
Travail de rivière (cuir)Index. décimale : 668.5 Parfums et cosmétiques Résumé : The use of enzymes during unhairing in the leather industry to partially reduce sulfide can decrease H2S emission to almost 50%. However the proteolysis needs to be controlled to prevent collagen damage. In bovine epidermis, the stratum corneum plays a crucial role as a hydrophobic barrier. In order to facilitate the diffusion of enzymes, it is necessary to generate channels through this barrier to allow enzymes pass without damaging the collagen. In an ideal enzymatic unhairing the proteolytic activity should be restricted to the basal lamina and pilosebaceous unit. During this experiment, fungal enzyme extracts (CE) were applied on bovine skin in the soaking and unhairing steps as part of the tanning process. The skin contacted with the solutions in two different ways : in direct contact with the epidermis (Mode I) and immersed in the solution (Mode II). Various keratinolytic fungi, previously isolated and selected from different soil samples were used : Neurospora crassa, Verticillium albo-atrum, Trichophyton ajelloi, Chrysosporium sp, Aspergillus sydowii, Paecilomyces lilacinus and Acremonium murorum. The fungal isolates were cultivated under solid state conditions using hair waste obtained from the hair-saving unhairing process as substrate. Enzyme extracts were characterized according to their keratinolytic and proteolytic activity and protein content. Once the immersion with fungal enzymes was finished, the treatment with N. crassa, T. ajelloi, Chrysosporium sp, A. sydowii and P. lilacinus, showed unhaired skin and epidermis removed. After the contact between the epidermis and fungal enzymatic extract of T. ajelloi empty hair follicles were observed. The morphological changes were studied with SEM (Scanning Electron Microscopy). Note de contenu : - INTRODUCTION : Epidermis - Basal lamina - Dermis - Objectives
- MATERIALS AND METHODS : Fungal strains isolates : culture and characterization - Assessment of protein content and proteolytic activity - Assay of proteolytic and keratinolytic activities - Mode I. Permeability assay of bovine skin epidermis with fungal enzyme extracts - Epidermis - Basal lamina - Dermis - Objectives
- MATERIALS AND METHODS : Fungal strains isolates : culture and characterization - Assessment of protein content and proteolytic activity - Assay of proteolytic and keratinolytic activities - Mode I. Permeability assay of bovine skin epidermis with fungal enzyme extracts - Control wells - Mode II. Assay with bovine skin immersed in the solutions - Control tubes - Scanning electronic microscopy (SEM) protocol
- RESULTS AND DISCUSSION : Assay of proteolytic and keratinolytic activities - SEM observationEn ligne : https://drive.google.com/file/d/1ym8R2Zy2q7HOf8f4HNvldFgm04pmesC6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31790
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 1 (01-02/2019) . - p. 28-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20620 - Périodique Bibliothèque principale Documentaires Disponible Wetting metamorphosis of hydrophobic fluoropolymer coatings submerged in water and ultrasonically vibrated / Matthew Trapuzzano in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
[article]
Titre : Wetting metamorphosis of hydrophobic fluoropolymer coatings submerged in water and ultrasonically vibrated Type de document : texte imprimé Auteurs : Matthew Trapuzzano, Auteur ; Nathan B. Crane, Auteur ; Rasim Guldiken, Auteur ; Andrés Tejada-Martinez, Auteur Année de publication : 2020 Article en page(s) : p. 633–642 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Caractérisation
Fluoropolymères
Hydrophobie
HystérésisL'hystérésis (ou hystérèse) et signifiant "après" ou "plus tard", est la propriété d'un système qui tend à demeurer dans un certain état quand la cause extérieure qui a produit le changement d'état a cessé.
Immersion
Mouillage (chimie des surfaces)
Revêtements organiques
Traitement thermique
UltrasonsIndex. décimale : 667.9 Revêtements et enduits Résumé : Many important processes—from the manufacturing of integrated circuit boards to an insect’s ability to walk on water—depend on the wetting of liquids on surfaces. Wetting is commonly controlled through material selection, coatings, and/or surface texture. However, wetting is sensitive to environmental conditions. In particular, some hydrophobic fluoropolymer coatings are sensitive to extended water exposure as evidenced by a declining contact angle and increasing contact angle hysteresis. Understanding “degradation” of these coatings is critical to applications that deploy them. The durability of a series of fluoropolymer coatings was tested by measuring the water contact angle before, during, and after extended submersion of coated glass slides in a deionized water bath. Vibration was introduced as a potential method for expediting the effects of long-term water exposure, so similar measurements were taken before, during, and after the same coatings were subject to ultrasonic vibration while covered in deionized water. Both methods caused changes in advancing and receding contact angles, but degradation rates of vibrated coatings were significantly increased. Prolonged soaking caused significant decreases in the contact angle of most of the samples, though most experienced significant recovery of hydrophobicity when heat-treated at 160°C after submersion. Some coatings appeared noticeably more resistant to degradation by one or both methods. FluoroSyl showed no clear change under submersion, while other coatings experienced significant contact angle change. Degradation of vibrated coatings was also inconsistent among coatings and was not simply an acceleration of the degradation resulting from submerging coatings in water. This was apparent as some coatings were affected by one method but not the other. Atomic force microscopy was utilized to characterize the surface roughness of the coatings and revealed differing surface effects for different coatings after submersion and heat treatment. However, the magnitude of this roughness change was insufficient to fully explain the wetting changes. The rate of contact angle degradation was not altered significantly for coatings that were vibrated with acceleration magnitudes between 700 and 7000 g. Note de contenu : - Submersion of coatings
- Heat treatment of submerged coatings
- Comparison of ultrasonically vibrated wet coatingsDOI : https://doi.org/10.1007/s11998-019-00250-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00250-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34095
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Code-barres Cote Support Localisation Section Disponibilité 21734 - Périodique Bibliothèque principale Documentaires Disponible