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A fluorometric fullerenol sensor for rapid detection of ionic and non-ionic surfactants / H. Härmä in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 1/2010 (01-02/2010)
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Titre : A fluorometric fullerenol sensor for rapid detection of ionic and non-ionic surfactants Type de document : texte imprimé Auteurs : H. Härmä, Auteur ; S. Laakso, Auteur ; S. Pihlasalo, Auteur ; P. Hänninen, Auteur Année de publication : 2010 Article en page(s) : p. 40-42 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Fluorometric fullerenol sensor Rapid detection Buckminsterfullerenes Cationic surfactant Anionic non-ionic Labeled protein Cetyltriammonium bromide (CTAB) Sodium dodecyl sulphate (SDS) Tween 20 Triton X-100 Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A fullerenol sensor utilizing fluorescence quenching of a labeled protein was developed for rapid detection and quantification of ionic (cetyltriammonium bromide (CTAB), sodium dodecyl sulphate, (SDS)) and non-ionic (Tween 20 and Triton X-100) surfactants in solution. The sensor is based on the competitive adsorption of the surfactants and the fluorescently labeled protein to fullerenols – hydroxylated buckminsterfullerenes. The fluorescence quenching between fullerenols and the fluorochrome-labeled protein was detected and related to the replacement of the labeled protein by the surfactants. The non-ionic surfactants could be measured at sub to low micromolar concentrations whereas significantly higher concentration of ionic surfactants was required to efficiently cover the fullerenol surface. The combination of the novel fullerenol sensor with existing micro titer plate fluorometric instrumentation can find use as a versatile and rapid probe for tracing various types of surface active molecules. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8069
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 47, N° 1/2010 (01-02/2010) . - p. 40-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011905 - Périodique Bibliothèque principale Documentaires Disponible Analysis of fluoride in toothpastes on the Belgian market / M. Borremans in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 30, N° 2 (04/2008)
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Titre : Analysis of fluoride in toothpastes on the Belgian market Type de document : texte imprimé Auteurs : M. Borremans, Auteur ; L. Goeyens, Auteur ; E. Vrindts, Auteur ; J. Meunier, Auteur ; P. van Den Meerssche, Auteur ; J. van Loco, Auteur Année de publication : 2008 Article en page(s) : p. 145-152 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Anion Chromatography Conductivity Detection after chemical suppression Fluoride toothpastes Index. décimale : 668.5 Parfums et cosmétiques Résumé : Nous avons développé une méthode pour la détermination quantitative du fluorure de sodium (NaF), du monofluorophosphate (SMFP) de sodium et de fluorure d'amine (AmF) dans les dentifrices du marché Belge. Les échantillons sont mis en suspension dans de l'eau et le dosage est effectué par chromatographie anionique avec une détection conductimétrique après une suppression chimique. La méthode décrite est une méthode HPLC isocratique facile et fiable pour la détermination du contenu de fluorure soluble total dans les dentifrices. La répétabilité analytique et la reproductibilité, les effets de matrices et la limite de décision de 3 différents dentifrices contenant NaF, SMFP et AmF à une concentration proche de la limite de 0.15 g % total F permise sont déterminés. Tous les échantillons analysés sont conformes à la directive 76/768/CE et ne dépassent pas la limite de 0.15 g %. DOI : 10.1111/j.1468-2494.2008.00425.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2008.00425.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4573
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 30, N° 2 (04/2008) . - p. 145-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010014 - Périodique Bibliothèque principale Documentaires Disponible 010057 - Périodique Bibliothèque principale Documentaires Disponible Digital system for detecting, classifying, and fast retrieving corrosion generated defects / S. T Kyvelidis in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 915 (04/2001)
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Titre : Digital system for detecting, classifying, and fast retrieving corrosion generated defects Type de document : texte imprimé Auteurs : S. T Kyvelidis, Auteur ; N. Kouloumbi, Auteur ; L. Lykouropoulos, Auteur Année de publication : 2001 Article en page(s) : p. 67-73 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture Corrosion Défaut Détection défaut Classification Système numérique Analyse image Index. décimale : 667.9 Revêtements et enduits Résumé : The in-situ assessment of the degradation of a coating system is often difficult, especially in cases such as underwater piping systems. Furthermore, the results of the optical inspection are qualitative and subjective. The use of digital image processing and storing of corrosion images in databases can eliminate such problems and enhance the assessment of the coating degradation characteristics.
Digital defect detection systems have been used in the industrial domain for the last 20 years to automatically detect and classify defects on various surfaces, such as wood, steel, and textiles, using image processing techniques and decision-making theory.
The proposed system processes digitized images of corroded surfaces by applying similar technologies (digital filters, texture analysis, segmentation techniques, and fuzzy decision algorithms) to automatically identify and classify corrosion generated defects, such as blisters, rust, etc. Furthermore, it employs state-of-the-art database techniques specialized for image content (query by example, content-based retrieval) to effectively store and retrieve these images according to their specific features.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5727
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 915 (04/2001) . - p. 67-73[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001223 - Périodique Bibliothèque principale Documentaires Disponible Development of a prototype for the rubber latex industry to detect dry rubber content of fresh natural rubber latex using a novel measurement system with proton-electron transfer / Sittidet Chooduang in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)
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Titre : Development of a prototype for the rubber latex industry to detect dry rubber content of fresh natural rubber latex using a novel measurement system with proton-electron transfer Type de document : texte imprimé Auteurs : Sittidet Chooduang, Auteur ; Korn Taksapattanakul, Auteur Année de publication : 2023 Article en page(s) : p. 225-232 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc Tags : Détection 'Caoutchouc sec' 'Latex caoutchouc frais' 'Mesure par transfert de protons-électrons' Index. décimale : 668.4 Plastiques, vinyles Résumé : Rubber latex industry has been looking for techniques to rapidly estimate the dry rubber content (DRC) of rubber latex with accuracy, at a low cost, and to be used by non-technical people in the field. The basis of electrical charge in terms of proton-electron transfer (P.E.TF) was used to develop a new prototype. The prototype was created with the P.E.TF system, two electrode probe detectors, and a new code program on Arduino board. The data was collected using the P.E.TF system of fresh natural rubber latex and presented as the P.E.TF number and the percentage of dry rubber content (%DRC). The standard method (ISO126:2005(E)) was used to calculate %DRC. The comparison of the %DRC measurement using the prototype and the standard method was studied. It was found that the new code program on Arduino board could evaluate the data. In real-time, it converted the P.E.TF number into %DRC on the LCD screen. The %DRC measurement using the prototype was close to that calculated using the standard method. The correlation between the two methods is 0.9814 of Rsqr. Therefore, the novel measurement system can replace the standard method for the %DRC measurement of fresh natural rubber latex. The prototype is simple, fast to detect, small, and low-cost without operator training. Note de contenu : - The new device
- Proton-electron transfer (P.E.TF) system
- Code program on Arduino board
- Data collection
- Result and discussion : Data collection with the new code program, the P.E.TF system of the prototype, and the standard method (ISO126:2005(E)) - Conversion of the P.E.TF number into the %DRC with the code program
- Table 1 : The data ranges of the P.E.TF number and the %DRC of fresh natural rubber latex
- Table 2 : The % DRC measurement of fresh natural rubber latex using the prototype with the P.E.TF system
- Table 3 : The % DRC measurement of fresh natural rubber latex using the standard method, ISO126:2005(E)DOI : https://doi.org/10.1515/ipp-2022-4304 En ligne : https://drive.google.com/file/d/1UG3luz9LRDYucNn5kdww0mVKBVNHDwR4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39503
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 2 (2023) . - p. 225-232[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24121 - Périodique Bibliothèque principale Documentaires Disponible Feasibility assessment of injection molding online monitoring based on oil pressure/nozzle pressure/cavity pressure / Hao-Hsuan Tsou in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 3 (2023)
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Titre : Feasibility assessment of injection molding online monitoring based on oil pressure/nozzle pressure/cavity pressure Type de document : texte imprimé Auteurs : Hao-Hsuan Tsou, Auteur ; Chung-Ching Huang, Auteur ; Zhi-Hao Wang, Auteur ; Ting-Wei Zhao, Auteur Année de publication : 2023 Article en page(s) : p. 375-386 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Evaluation
Matières plastiques -- Moulage par injection
Matières plastiques -- Moulage par injection -- Appareils et matériel
Surveillance électroniqueTags : 'Valeur caractéristique de la courbe pression dans cavité du moule' 'Analyse corrélation' 'Signaux machine à injection''Moulage par injection' 'Système détection en ligne' Index. décimale : 668.4 Plastiques, vinyles Résumé : This study produced a box-like product through injection molding, and pressure sensors were installed at the nozzle in the injection molding machine and mold cavity. Injection molding experiments were conducted with various process parameters to understand the correlations between the pressure of the cavity, nozzle, and oil pump. A high correlation (R > 0.95) between oil pressure and nozzle pressure could be found in the study. The oil pressure in the injection molding machine could fully describe the pressure variation of the molten plastic at the nozzle. However, the correlation between nozzle pressure and cavity pressure was slightly reduced due to changes in injection speed, melting temperature, and packing time. Thus, a suitable molding window can improve the correlation between oil pressure, nozzle pressure, and cavity pressure. This study provides a correlation between the three pressures and a reference for the future selection of process variables, an essential pretreatment for online monitoring. Note de contenu : - THEORETICAL ANALYSIS AND EXPERIMENTAL METHODS : Materials and procedures - Equipment and injection mold - Characterization and analysis of the pressure-stime curve
- RESULTS AND DISCUSSION : Effects of the process parameters on the characteristics of the pressure curves - Correlation between injection machine oil pressure and nozzle injection pressure - Correlation between nozzle pressure and cavity pressure - Analytical results for wear evaluation of non-return valves using pressure signals
- Table 1 : Single factors experiment planning
- Table 2 : Non-return valve diameter and corresponding codeDOI : https://doi.org/10.1515/ipp-2022-4281 En ligne : https://drive.google.com/file/d/1sV_2wbIkaCybUGyGv2ykToaVzdvc0wW0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39699
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 3 (2023) . - p. 375-386[article]