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Inhibitory mechanism of hexavalent chromium formation in chrome-tanned leather with combined inhibitors / Koki Ogata in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Inhibitory mechanism of hexavalent chromium formation in chrome-tanned leather with combined inhibitors Type de document : texte imprimé Auteurs : Koki Ogata, Auteur ; Shunji Hattori, Auteur ; Koji Takahashi, Auteur Année de publication : 2019 Article en page(s) : p. 253-259 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique
Chrome hexavalent
Inhibiteurs (chimie)
Statistique
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The perfect inhibition of Cr6+ formation in Cr-tanned leather has been reported using combined inhibitors consisting 3(2)-t-butyl-4-hydroxyanisole (BHA), ascorbic acid (AsA), and collagen peptide (CP-9). In this study, the inhibitory mechanism of the combined inhibitors was investigated with respect to: (i) Inhibiting the conversion of Cr3' to Cr6+ by scavenging lipid radicals and peroxy radicals in free lipid of Cr-tanned leather; (ii) strengthening the reductivity within Cr-tanned leather; and (iii) stabilising Cr3+ complexes by coordination with CP-9. Electron spin resonance (ESR) of free lipid extracted from the Cr-tanned leather treated with combined inhibitors showed that free radicals considerably reduced with BHA and AsA. AsA markedly depressed peroxide value (POV), indicating strong effectiveness of the reducing action of AsA. The CP-9-added extract with 0.1 mol/L potassium phosphate buffer (pH 5.5) of the Cr-tanned leather before changing from pH5.5 to 8.0 showed that the conversion of Cr3+ to Cr6+ showed concentration-dependent inhibition, suggesting stabilisation through CP-9 coordination. Therefore, perfect inhibition of Cr6+ formation in Cr-tanned leather using combined inhibitors was concluded to be caused by the multiple inhibitory actions of BHA, AsA, and CP-9, such as radical scavenging, radical scavenger regeneration, reducing action, and Cr3+ stabilisation. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of free and bound lipids in Cr leather - ESR - Peroxide value (POV) measurements - Carbonyl value (COV) measurement - Estimation of stabilisation of Cr3+ complex with CP-9 - Analytical methods - Statistical analysis
- RESULTS : Radical scavenging action of inhibitors - Stabilisation of free Cr3+ complexEn ligne : https://drive.google.com/file/d/1LhJTnvaHNvu7PeQaURJOAhIvfRmLXZAv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33000
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 5 (09-10/2019) . - p. 253-259[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Innovative sunscreen with cooling effect for protection in the VIS and NIR regions for Asian skin type / Alexandra Lan in SOFW JOURNAL, Vol. 144, N° 10 (10/2018)
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Titre : Innovative sunscreen with cooling effect for protection in the VIS and NIR regions for Asian skin type Type de document : texte imprimé Auteurs : Alexandra Lan, Auteur ; Bin Chen, Auteur ; Lei Ye, Auteur ; Keesuh Lee, Auteur ; Nan Lu, Auteur ; Dongfang Kang, Auteur ; Jürgen Lademann, Auteur ; Sabine Schanzer, Auteur ; Silke Barbara Lohan, Auteur ; Martina C. Meinke, Auteur Année de publication : 2018 Article en page(s) : p. 54-61 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents rafraichissants
Antiradicalaire
Facteur de protection solaire
Formulation (Génie chimique)
Peau asiatique
Produits antisolaires
Protection contre le rayonnement infrarouge
Protection contre le rayonnement ultraviolet
StatistiqueIndex. décimale : 668.5 Parfums et cosmétiques Résumé : In view of the globally increasing incidence of skin cancer, sun exposure and the application of sunscreens are steadily gaining in importance. Today it is known that skin damage is caused not only by UV-induced erythema but also by increased amounts of free radicals that are formed by solar radiation in the visible and near infrared (NIR) spectral regions and sun protection could be different for the different skin types. The antioxidant capacity and the scattering properties of the formulation were determined as important protection beyond ultraviolet (UV) light. The radical protection in the visible and NIR regions was determined ex vivo using EPR spectroscopy. The cooling effect of the formulation was analyzed on Asian skin in vivo, and the NIR protection was investigated by measuring cutaneous carotenoids before and after NIR radiation. The company Pechoin was the 'first en¬terprise to develop a sunscreen for the skin types III — VI. This product protects efficiently both from UV and NIR solar radiation. Its formulation consists of a well-balanced selection of titanium dioxide pigments, highly efficient antioxidants as used in the traditional Chinese medicine, and coolants. Thanks to all these ingredients the concentration of radicals can be clearly reduced, especially in darker skin types. Note de contenu : - Subjects - Sunscreen
- Determination of the Radical Protection Factor (RPF) of the ingredients and the sunscreen sample
- Determination of the optical properties of the sunscreen sample
- Cooling effect in vivo
- SPF determination in vivo
- NIR protection in vivo
- Statistical analysis
- Table 1 : RPF and scattering coefficient µs' at 800 nm of the investigated formulation compared to previously investigated sunscreen (12) shown
- Fig. 1 : Optical properties absorption µa and scattering effective coefficient µs' of the new sunscreen between 450 and 800 nm
- Fig. 2 : Cumulative radical formation in the skin after irradiation with 71 mW in the VIS/NIR spectral range. Mean ± SEM, *** p ⩽ 0.001 ; statistically significant difference in relation to unprotected skin (untreated)
- Fig. 3 : Box plot of the radical production in the skin after 10 min VIS/NIR irradiation (*** p ⩽ 0.001)
- Fig. 4 : Skin temperature course measured before and during NIR irradiation (60mW/cm2). At treated area 2 mg/cm2 sunscreen was applied, n=10
- Fig. 5 : Relative carotenoid concentration in the skin, before and after NIR irradiation (60m/W/cm2) for untreated and sunscreen treated skin (2 mg/cm2), n=6En ligne : https://drive.google.com/file/d/1OlmTHFwrDGMPYLLEfhTDql9zd4WLTo1j/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31330
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Code-barres Cote Support Localisation Section Disponibilité 20515 - Périodique Bibliothèque principale Documentaires Disponible Integrated life-cycle design of coatings on exterior wood / L. Strömberg in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
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Titre : Integrated life-cycle design of coatings on exterior wood : Part 1: Service life planning Type de document : texte imprimé Auteurs : L. Strömberg, Auteur ; J. Ekstedt, Auteur Année de publication : 2004 Article en page(s) : p. 121-125 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Durée de vie (Ingénierie)
Enrobage (technologie)
Evaluation
Lasures
Polyacryliques
Polyalkydes
Revêtement en phase solvant
Revêtements -- Propriétés physiques
Revêtements en phase aqueuse
StatistiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, the statistical distribution of the reference service life of exterior wood coatings has been calculated for two coating systems: an alkyd oil and a solvent-borne alkyd (stain). The estimated service life has been evaluated, based on exposure tests and on the assessment of experts for another three coating systems (namely a solvent-borne alkyd coating, a water-borne acrylic coating, and a water-borne acrylic stain). It has been shown that the combination of a standard procedure for the measurement of cracking and statistical tools, such as reliability-based methodologies, for predicting the service life of coating systems gives more information regarding reference service life data than purely by a measurement of cracking. Note de contenu : - EXPERIMENTAL : Materials - Methods - Calculations
- RESULTS AND DISCUSSION : Statistical analysis
- Table 1 : Physical properties of coatings
- Table 2 : The coating systems
- Table 3 : Cracking scores for the radial-cut and tangential-cut samples for the alkyd oil and for the alkyd stain
- Table 4 : The calculated reference service life for the alkyd oil and the alkyd stain
- Table 5 : The estimated service life for the water-borne acrylic stain, the water-borne acrylic coating and the solvent-borne alkyd coatingDOI : 10.1007/BF02699606 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699606.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5472
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Code-barres Cote Support Localisation Section Disponibilité 000391 - Périodique Bibliothèque principale Documentaires Disponible Investigation of the effect of waste materials on the properties of the composite polymer prosthetics limbs / Reem Alaa Mohammed in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 23, N° 4 (08/2022)
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Titre : Investigation of the effect of waste materials on the properties of the composite polymer prosthetics limbs Type de document : texte imprimé Auteurs : Reem Alaa Mohammed, Auteur ; Marwah Subhi Attallah, Auteur ; Aseel B. Al-Zubidi, Auteur ; Layth Al-Gebory, Auteur Année de publication : 2022 Article en page(s) : p. 191-197 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse de variance En statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Composites à fibres -- Propriétés mécaniques
Dureté (matériaux)
Papier -- Recyclage
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
StatistiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Nowadays, the trend to benefit from environmentally friendly waste and recycle it instead of incineration processes that can cause pollution in the environment to have a clean and green environment that is free from pollution and can work for a long time without consumption and damage. This study is designed to manufacture prosthetics limbs from PMMA (polymethyl methacrylate) reinforced with different weight percentages of waste paper layers (0%, 3%, 6%, 9%, and 12%) by the "hand lay" method. The tensile, flexural, impact, compression, and hardness of these composites are tested before and after adding weight percentages waste paper layers to determine the mechanical properties behavior. The average values of all the samples are collected and analyzed by one-way analysis of variance (ANOVA) to interpret the results. When discussing the results of mechanical tests, it is found that the addition (12%-waste paper layers) to (PMMA) increased the average values (tensile, flexural, impact, compression, and hardness) by 142.1%, 532.3%, 146%, 99.2%, and 6.37% ; respectively, compared to the mean values of other samples. It is clear from this work there is an improvement in the properties of PMMA after strengthening with waste paper layers. Note de contenu : - LABORATORY WORK : Prepare materials and samples - Mechanical properties tests
- STATISTICALLY ANALYSING
- RESULTS AND DISCUSSION : Tensile strength - Flexural strength - Impact strength - Compression strength - Hardness (Shore D) - ANOVA analysis
- Table 1 : The characteristics of the waste paper
- Table 2 : Characteristics of PMMA (Poly methyl methacrylate)
- Table 3 : Specimens' composition
- Table 4 : The means tensile strength for samples
- Table 5 : Means, std. flexural strength for sample
- Table 6 : Average values of the maximum impact strength for sample
- Table 7 : Compression strength for sample
- Table 8 : Hardness for sample
- Table 9 : Analysis ANOVA of all testsDOI : https://doi.org/10.18280/rcma.320404 En ligne : https://www.iieta.org/download/file/fid/79473 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38210
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Code-barres Cote Support Localisation Section Disponibilité 23829 - Périodique Bibliothèque principale Documentaires Disponible Is lead dead ? / Alison B. Kaelin in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 5 (05/2013)
[article]
Titre : Is lead dead ? : A look back and a look forward at 20 years of bridge painting under the osha lead in construction interim final rule and other related standards Type de document : texte imprimé Auteurs : Alison B. Kaelin, Auteur Année de publication : 2013 Article en page(s) : p. 44-61 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bâtiments, travaux publics
Infractions
Peinture -- Teneur en plomb
Plomb -- Toxicologie
StatistiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : On May 4, 2013, OSHA's standard for protecting construction workers from lead exposure (29 CFR 1926.62) celebrated its 20th anniversary. Initially titled, "Lead Standard: Interim Final Rule on Lead Exposure in Construction," and now simply titled "Lead," 1926.62 was issued because of what was known at the time about the health risks of overexposure to lead—risks such as neurological disorders and reproductive problems. Despite 20 years of training and education for 1926.62 as well as enforcement of it, Occupational Safety and Health Administration (OSHA) statistical data from October 2011 through September 2012 for citations for the SIC code most commonly used for bridge painters, 1721, Painting/Paper Hanging, indicates that citations under 1926.62 remain the top regulatory finding for painting. Moreover, that finding mirrors the regulatory findings over the past 10 years.
This article will report statistics on violations of 1926.62 among painting and other construction trades; summarize findings on blood lead levels and current knowledge about the health risks lead exposure poses; review 1926.62 and related regulations affecting lead exposure; and offer observations, recommendations, and questions for owners and others involved with lead paint removal on bridges and other structures.Note de contenu : - OSHA enforcement of 29 CFR 1926-62
- Blood lead levels
- New studies and health effect data
- Regulations : background (hen and now)
- Definitions of lead in paint
- HUD guidelines
- Worker protection (OSHA)
- Hazard communications standard
- Worker certification and training (HUD/EPA)
- EPA : National ambient air quality standards for lead - Clean water act (CWA) - Waste handling and disposal - Soils
- Health effects and lower exposure
- New sources of lead and exposure pathways
- Challenges with compliancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19142
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Code-barres Cote Support Localisation Section Disponibilité 15229 - Périodique Bibliothèque principale Documentaires Disponible Laminated cervine leather for apparel / C. M. Bruce in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
PermalinkLime free unhairing : sodium aluminate as an alternative towards a cleaner process / Justa Sirvaityte in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 11 (11/2016)
PermalinkLong-term retinol decomposition profile and emulsion chassis & package impact to destabilization / Hoyun Kim in SOFW JOURNAL, Vol. 143, N° 11 (11/2017)
PermalinkMathematical models for water vapour resistance prediction of printed garments / Mladen Stancic in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)
PermalinkMeasurement of hexavalent chromium in chrome-tanned leather : comparative study of acidic condition extraction with alkaline extraction / Koki Ogata in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
PermalinkMeasurements meet perceptions : rheology-texture-sensory relations when using green, bio-derived emollients in cosmetic emulsions / An Huynh in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 1 (02/2021)
PermalinkMécanismes de la formation de films épais de peintures à partir de polymères en dispersion dans l'eau dans des conditions extrêmes de température et d'humidité / André Saldinari / 1982
PermalinkMechanical and water interaction properties of polymeric films produced with starch and gelatin extracted from leather waste as affected by different composition / Bianca Santinon Scopel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 1 (01/2019)
PermalinkMechanical characterization of randomly oriented short Sansevieria Trifasciata natural fibre composites / E. Fantin Irudaya Raj in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 5 (2023)
PermalinkMicroneedle patch based on dissolving, detachable microneedle technology for improved skin quality of the periorbital region. Part 2 : Clinical Evaluation / V. Zvezdin in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 5 (10/2021)
PermalinkModelling the properties of pigment-printed polypropylene nonwoven fabric using the Box–Behnken technique / Tanveer Hussain in COLORATION TECHNOLOGY, Vol. 131, N° 6 (12/2015)
PermalinkMoringa oleifera Lam. leaf extract : Anti-inflammtory and antioxidant cosmetic ingredient for holistic skin and hair care / Luis Apaza in SOFW JOURNAL, Vol. 146, N° 3 (03/2020)
PermalinkNano-cerium dioxide synergistic potential on abrasion resistance and surface properties of polyurethane-nanocomposite coatings for esthetic and decorative applications on wood / Akbar Mastouri Mansourabad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
PermalinkNatural anti-acne extract aids healthy skin microbiota / Carine Boutot in PERSONAL CARE EUROPE, Vol. 14, N° 2 (04/2020)
PermalinkNEOS : An odour-induced affect scale for use in the cosmetic industry / Plinio A. Barbosa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 46, N° 1 (02/2024)
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