Development of quantitative estimation of hair follicle patterns for leather surface by point pattern analysis / Satoru Dohshi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 1 (01-02/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 1 (01-02/2013) . - p. 1-4 Titre : Development of quantitative estimation of hair follicle patterns for leather surface by point pattern analysis Type de document : texte imprimé Auteurs : Satoru Dohshi, Auteur ; Akira Okumura, Auteur ; Hisayoshi Shiozaki, Auteur Année de publication : 2013 Article en page(s) : p. 1-4 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Comptage Cuirs et peaux -- Analyse Cuirs et peaux de chèvres Follicule pileux Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The quantitative estimation of hair follicle patterns for a leather surface was investigated by point pattern analysis for use a possible method for correct identification of leather materials. The L-function was used as a point pattern analysis. In the case of goatskins, the L-function correctly indicated the distribution patterns of guard hair follicles. Moreover, it was found that the density of hair follicles and the microscope magnification affect could be estimated quantitatively by point pattern analysis with optimum conditions. This result suggested that leather materials could be identified objectively by this method. Note de contenu : - EXPERIMENTAL PROCEDURE : Leather sample - Observation by microscope - Point pattern analysis - RESULTS AND DISCUSSION : L-function for goatskin - Effect of individual differences - Effect of the microscope observation method - Effect of the microscope magnification En ligne : https://drive.google.com/file/d/12W4HD1IXnSkY3_vxFFt3W5L-o0vYmCR9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17446 [article]

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Effect of the removal method of hide powder on the porous properties of nanoporous silice / Satoru Dohshi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 2 (03-04/2012)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 2 (03-04/2012) . - p. 68-70 Titre : Effect of the removal method of hide powder on the porous properties of nanoporous silice Type de document : texte imprimé Auteurs : Satoru Dohshi, Auteur Année de publication : 2012 Article en page(s) : p. 68-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Extraction (chimie) Granulométrie Particules (matière) -- Synthèse Poudre de peaux Silice poreuse Thermogravimétrie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nanoporous silica has been successfully synthesized using hide powder as a template. We investigated the optimum conditions for the extraction of hide powder with acidic solutions and the effect of the removal method of hide powder from hide powder/silica composite on the porous properties of nanoporous silica. It was found from thermogravimetric (TG) measurements that hide powder could be removed from hide powder/silica composite by extraction with 10vol% HCI aqueous solution at 333K for 24 hours. It was also found from N2 adsorption-desorption isotherm measurements that nanoporous silica synthesized by acid extraction possessed a large specific surface area over 1000m2 g-1. Moreover, micropore volume and micropore size for nanoporous silice synthesized by acid extraction was larger than those for nanoporous silica synthesized by calcination at high temperature. We demonstrated that the acid extraction with 10vol% HCI aqueous solutions was reasonable for the removal of hide powder from hide powder/silica composite. Note de contenu : - Optimum conditions for extraction with HCI aqueous solution - Effect of the removal method of hide powder on the porous properties of nanoporous silica En ligne : https://drive.google.com/file/d/1Bhcxz1YDlSEUXEeLpUCcECkAexOWYbh1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14571 [article]

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Possibility of synthesis of nanoporous silica using hide powder as a template / Satoru Dohshi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 5 (09-10/2011)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 5 (09-10/2011) . - p. 200-203 Titre : Possibility of synthesis of nanoporous silica using hide powder as a template Type de document : texte imprimé Auteurs : Satoru Dohshi, Auteur Année de publication : 2011 Article en page(s) : p. 200-203 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Cuirs et peaux -- Déchets -- Recyclage Désorption Matériaux poreux Microscopie électronique à balayage Nanoparticules -- Synthèse Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nanoporous silica has been successfully synthesized using hide powder as a template. The nanoporous silica possessed micropores and/or mesopores and a large specific surface area of over 900m2-1. It was found from the results of N2 adsorption - desorption isotherm measurements that the pH value of the synthesis mixtures mainly affected the pore structure and the surface area of nanoporous silica. Moreover, from the results of SEM observations, this nanoporous silica, regardless of the synthesis conditions, was composed of fibrous silica, which resembled the collagen fibril structure. These results showed the possibility of novel effective use of leather wastes for the synthesis of functional materials. Note de contenu : - Hide powder - Synthesis - Characterization En ligne : https://drive.google.com/file/d/1o9Jcy1Nyv1iV6J1HaLrPiCsDw-3VIpkQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12219 [article]

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Quantitative estimation of hair follicle patterns for leather surface using K-function (L-fonction) Method (i): influence of individual and location differences for goatskins on estimation of L-function / Satoru Dohshi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 4 (07-08/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 4 (07-08/2013) . - p. 145-148 Titre : Quantitative estimation of hair follicle patterns for leather surface using K-function (L-fonction) Method (i): influence of individual and location differences for goatskins on estimation of L-function Type de document : texte imprimé Auteurs : Satoru Dohshi, Auteur Année de publication : 2013 Article en page(s) : p. 145-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Comptage Cuirs et peaux -- Analyse Cuirs et peaux de chèvres Follicule pileux Fonctions L Microscopie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The purpose of this work was to investigate the influence of individual and location differences on the quantitative estimation of hair follicle patterns for goatskins using the K-function (L-function) method. Five pieces of chrome-tanned goatskins were used in this study. Hair follicle patterns of butt, shoulder and belly locations for goatskins were observed by a digital microscope and were quantitatively estimated using K-function (L-function) method. As a result, a characteristic L-function for goatskin was observed. No individual differences in hair follicle patterns of goatskins were observed for both observation images and quantitative estimation. On the other hand, since the mean distance betWeen two hair follicles for belly location was longer than those for butt and shoulder locations, small location differences were observed for goatskins. However, for ail samples and locations, the L-function seemed low by comparison with random distribution within the region of the existence of three guard hair follicles. In conclusion, it was found that a characteristic L-function for the hair follicle patterns of goatskin was observed and the K-function (L-function) method becomes a useful tool to quantitatively estimate hair follicle patterns of goatskins. Note de contenu : - Leather sample - Observation by microscope - K(r) (L(r)) method En ligne : https://drive.google.com/file/d/1F5MUEDoL23kRnghySvEOCZeYEKK5wv6P/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19218 [article]

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Quantitative estimation of hair follicte patterns for leather surface using K-function (L-function) method (2) : Influence of individual and location differences for sheepskins on estimation of L-function / Satoru Dohshi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 5 (09-10/2013)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 5 (09-10/2013) . - p. 185-194 Titre : Quantitative estimation of hair follicte patterns for leather surface using K-function (L-function) method (2) : Influence of individual and location differences for sheepskins on estimation of L-function Type de document : texte imprimé Auteurs : Satoru Dohshi, Auteur Année de publication : 2013 Article en page(s) : p. 185-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Comptage Cuirs et peaux -- Analyse Cuirs et peaux de moutons Follicule pileux Fonctions L Microscopie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The purpose of this study was to estimate sheepskin hair follicle patterns quantitatively using the K-function (L-function) method. Especially, the influence of individual and location differences on the estimation of L-function was investigated. Five pieces of chrome-tanned sheepskins were used in this study. Hair follicle patterns of butt, shoulder and belly locations for sheepskins were observed by a digital microscope and were quantitatively estimated using K-function (L-function) method. As a result, it was found that the hair follicle patterns of sheepskins are defined as random distributions for all distances from the chosen sampling point, although they seemed to be regular distributions when observing them using a microscope. No individual and location differences in hair follicle patterns of sheepskins were observed for both observation images and quantitative estimation (L-function). It is concluded that quantitative estimations of hair follicle patterns by K-function (L-function) method is indispensable for the identification of leather materials, because judgments using both observation by a microscope and a statistical K-function (L-function) method give different results for the distribution of hair follicles for sheepskins. In the future, quantitative estimations of hair follicle patterns for a variety of leathers used in leather goods also need to be discussed. Note de contenu : - Leather sample - Observation by microscope - K(r)) (L(r)) method En ligne : https://drive.google.com/file/d/1AzZhD_REu9kjm1YPSv0vWbfp-NoUnaT_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19551 [article]

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