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JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) / Union internationale des sociétés de techniciens et chimistes des industries du cuir . Vol. 101, N° 4Mention de date : 07-08/2017Paru le : 17/08/2017 |
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Ajouter le résultat dans votre panierAdvanced approaches in leather research using X-ray probe equipped SEM microscopy / Claudia Florio in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
[article]
Titre : Advanced approaches in leather research using X-ray probe equipped SEM microscopy Type de document : texte imprimé Auteurs : Claudia Florio, Auteur ; Biagio Naviglio, Auteur ; Gianluigi Calvanese, Auteur Année de publication : 2017 Article en page(s) : p. 165-172 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Microanalyse par émission X
Microscopie électronique à balayage
Morphologie (matériaux)
RechercheIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Early microscopy techniques, such as optical, or the former electronic microscopy techniques, were widely utilised in leather research, mainly as an initial approach, or as additional tool to obtain useful information. Throughout the ages, the developments reached in microscopy technologies have allowed their utilisation as the main, determining tool to get results in many research fields.12
The modern scanning electron microscopy (SEM) technique that we have utilized in leather research, was equipped with an X-ray probe for the microanalysis of the samples and has resulted in being the most required, versatile tool in many applications: hair characterisation, characterisation of micro¬organisms involved in leather damage, investigations on leather defects and their causes, finishing characterisation, surface treatment studies, diagnostic investigations of historic leathers for their value and conservation.
ln the majority of these applications a very small portion of sample was available for the analysis. In spite of this, the technique gave.comprehensive results and was able to solve the most problematic cases of leather damage that we investigated. Particularly, SEM rnicroanalysis is considered to be 'non-destructive' indeed, as X-rays generated by electron interactions do not lead to volume loss of the sample, so it is possible to analyze the same materials repeatedly.
The study provided much interesting feedback, reinforcing our knowledge on all the topics dealt with.Note de contenu : - Morphological studies
- MicroanalysisEn ligne : https://drive.google.com/file/d/1CZ_OBeXNuZc34TERI387aNz4Sa-ZdslJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28889
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Application of antimicrobial nano-materials on leather : a review / Meruyert Koizhaiganova in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Application of antimicrobial nano-materials on leather : a review Type de document : texte imprimé Auteurs : Meruyert Koizhaiganova, Auteur Année de publication : 2017 Article en page(s) : p. 173-178 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Conservation
Dioxyde de silicium
Dioxyde de titane
Nanoparticules
ZirconeLe dioxyde de zirconium ou oxyde de zirconium(IV) couramment appelée zircone est un composé inorganique du zirconium de formule ZrO2. Ce matériau est une céramique technique d'aspect opaque. Appelé CZ (Cubic Zirconia) lorsque transparent, il est utilisé pour imiter le diamant. Il ne faut pas le confondre avec le zircon (ZrSiO4). Sous sa forme tétragonale, l'oxyde de zirconium est un matériau a vocation mécanique, cette évolution cristallographique lui confère une dureté très élevée (1200Hv) ainsi qu'une bonne résistance aux sollicitations mécaniques (700Mpa en traction et 2000Mpa en compression). Une fois polie, la zircone tétragonale peut atteindre un Ra de 0,02, ce qui permet de l'utiliser pour des pièces de frottement.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Microbial activity on leather during its storage and use is one of major problems in the leather industry. Micro-organisms cause damage which costs millions of dollars to the global leather industry. Hide and skin suppliers and tanners are aware of the necessity to use antimicrobial products to protect their precious raw material. The control of bacteria and fungi growth is important to prevent and minimize the generation of mal odours and some skin problems as weII. Recently, the leather industry has been exploring the benefits of remarkable properties of nanoparticles with antimicrobial properties.
In this antimicrobial effects of nano silver, nano silver-doped titanium dioxide and silicon dioxide, nano-size silicon dioxide and zirconium oxide on leather material are presented.Note de contenu : - Nanosilver and its antimicrobial activity on leather
- Nanosilver and its mechanism of action
- Antimicrobial effects of silver-doped materialsEn ligne : https://drive.google.com/file/d/1RKox7aUYD1SDVqk8lKf0ilWnidnx2u0h/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28890
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Determination of volatile aldehyde and ketone in leather shoes with static absorption and high performance liquid chromatography / Dai Hong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Determination of volatile aldehyde and ketone in leather shoes with static absorption and high performance liquid chromatography Type de document : texte imprimé Auteurs : Dai Hong, Auteur ; Wu Jie, Auteur ; Jia Wenrui, Auteur ; Chen Lei, Auteur ; Zhang Zongcai, Auteur Année de publication : 2017 Article en page(s) : p. 179-182 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
AldéhydesUn aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
Cétones
Chaussures
Chromatographie en phase liquide à hautes performances
Composés organiques volatils
Cuirs et peaux -- AnalyseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, volatile low molecular weight aldehydes and ketones in samples of leather shoes were collected by static absorption with water, analyzed and detected by 2,4dinitrophenylhydrazine pre-column derivatization of high performance liquid chromatography (HPLC). Firstly, the sampling temperature and lime of the volatile aldehyde and ketone in leather shoes were optimized and then the volatile aldehyde and ketone in absorption liquid were determined. The experiment result shows that the optimal temperature is 45°C, the sampling time is 24 hours. The collected sample was derivatized by purified sulfuric acid acidulated 2,4dinitrophenylhydrazine. The volatile aldehydes and ketones in absorption liquid of leather shoes were formaldehyde, acetaldehyde, acetone propionaldehyde, butyraldehyde, benzaIdehycle, cyclohexanone and hexanal the average concentrations of which are : 0.252mg/shoe, 0.061mg/shoe, 0.079mg/shoe, 0.053mg/shoe, 0.037mg/shoe, 0.011mg/shoe, 0.09mg/shoe, 0.018mgishoe respectively. This method is suitable for determination of volatile aldehydes and ketones in leather shoes.
Note de contenu : - EXPERIMENTAL PROCEDURE : Main materials and reagents - Laboratory apparatuses and devices - Experimental methods and procedures
- RESULTS AND DISCUSSION : The sampling time of the volatile aldehyde and ketone in leather shoes - Sampling temperature of the volatile aldehyde and ketone in leather shoesEn ligne : https://drive.google.com/file/d/1LMkLPfmap_End_o9fKlCA89GLHW87xkU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28891
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Synthesis, properties and application in leather colouration of novel polymeric dye based on hyperbranched poly(amine-ester) / Yulu Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Synthesis, properties and application in leather colouration of novel polymeric dye based on hyperbranched poly(amine-ester) Type de document : texte imprimé Auteurs : Yulu Wang, Auteur Année de publication : 2017 Article en page(s) : p. 183-189 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Synthèse
Cuirs et peaux -- Teinture
Polyamine ester
Polymères ramifiés
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A novel polymeric dye was constructed by the reaction of hydroxyl-terminated hyperbranched poly(amine-ester) (HPAE) with a reactive dye. Firstly, the 2nd generation of HPAE (HPAE-2) was modified with different amounts of maleic anhydride, and then reacted successively with Reactive Light Yellow K-4G (C.I.13245,CAS:12226-48-1) to obtain a new kind of polymeric dye, identified as HPD-1, HPD-2 and HPD-3, respectivety. The structure of HPD-2 was measured by FTIR, which showed that the dye molecule was grafted successfully on HPAE-2. The grafting rates of K-4G were all above 87%. The stabilities of HPD against AlCI3 were investigated by UV-vis spectrum, and it was shown that the polymeric dye was precipitated against At(III) ions fixation was likely to be improved if Al3+ was used at the end of dyeing. The polymeric dyes were used in the colouration of wet-blue leather, and their exhaustion rates were more than 99%. Leather samples dyed with HPD had good colour saturation and levelness proved by colour differences (DE). Dry and wet rubbing fastness of the leather samples were grades 4-5, and good washing fastness resulted. Note de contenu : - MATERIALS AND METHODS : Materials and instrumentations - Preparation of polymeric dye based on hyperbranched poly(amine-ester) (HPD) - The grafting rate determination of K-4G on hyperbranched poly(amine-ester) - The effect of AICI3 on the stability of the polymeric dye - Dyeing performance of the polymeric dye
- RESULTS : Preparation of polymeric dye based on hyperbranched poly(amine-ester) (HPD) - The effect of AICI3 on the solubility of the polymeric dye - The exhaustion rates of the polymeric dye - The levelling properties of the polymeric dye - The colour fastness of the polymeric dyeEn ligne : https://drive.google.com/file/d/1r9fIIDUw2tg9rNd46ESSqvvK7ajOZIXO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28892
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Processing of amazon catfish skins - dourada (brachyplathstoma sp.) and piraiba (brachyplatystoma sp.) / Joao Antonio Pessoa da Silva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Processing of amazon catfish skins - dourada (brachyplathstoma sp.) and piraiba (brachyplatystoma sp.) Type de document : texte imprimé Auteurs : Joao Antonio Pessoa da Silva, Auteur ; Crislaine Fabiana Bertoldi, Auteur ; Aline de Cassia Campos Pena, Auteur ; Manoel Rodrigues da Silva, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 190-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de Poissons
Déchets organiques -- Recyclage
Microscopie
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this work, Piraiba and Daurade skin wastes were used for leather processing. They were initially stripped and characterized by their percentage composition. The results showed that pH, differential pH cipher [SLC13/ WC 111 BS 1309:9 — Determination of pH value and Difference Figure of an Advenus Extract], chromium content and mechanical properties after chromium tanning were in accord with leather specifications. Further results demonstrate that the tensile and tear strength of the leather varied depending on the direction of the collagen fibres. Microscopic analysis allowed us to verify that the fibre structure is interlaced and compact. This work also determined that the shrinkage temperatures, as measured by DSC were 98.24 and 104.06°C for Dourada and Piraiba leather, respectively, In conclusion, the characterization demonstrated the feasibility of using waste skins of Piraiba and Daurade for leather processing, adding value to a sub-product of fish processing. Note de contenu : - Skin preparation and leather processing
- TABLES : 1. Formulation for processing fishkins - 2. Composition of fishskins - 3. Properties of fish leathers - 4. Physical and mechanical properties of fish leathers - 4. Thickness and tear strengthof fish leathers
- FIGURES : 1. Optical microscopy of the Dourada and Piraiba leather surface observed in stereomicroscope (70x) - 2. DSC curves of the fish leathersEn ligne : https://drive.google.com/file/d/1Wu55cCDvpoMitd1qC7tvylOUTsiuAO_v/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28893
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Research on acquisition of leather section images by metallographic sample preparation as a basis for 3-dimensional reconstruction / Miao Changkun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Research on acquisition of leather section images by metallographic sample preparation as a basis for 3-dimensional reconstruction Type de document : texte imprimé Auteurs : Miao Changkun, Auteur ; Huayong Zhang, Auteur ; Jinyong Cheng, Auteur ; Tianduo Li, Auteur Année de publication : 2017 Article en page(s) : p. 195-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Echantillonnage
Imagerie tridimensionnelle
MétallographieLa métallographie est la technique consistant à déterminer la structure d'un métal en l'observant avec un microscope optique. On peut déterminer ainsi, selon les cas : la taille et la forme des cristallites (ou grains) ; la répartition des phases ; la direction des lignes de glissement (intersection des plans de glissement avec la surface), dans le cas d'un échantillon déformé (voir les articles sur la déformation plastique et la dislocation). L'observation simple d'un objet métallique ne donne pas de renseignement particulier hormis l'état de surface (aspérités, fissures).
MicroscopieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper, using goal leather samples, firstly established a suitable quality evaluation method for assessing leather cross section images to be used for three-dimensional reconstruction. We then studied the influence of microscope parameters and metallographic sample preparation conditions on image quality during the process of obtaining images in order to determine the operational parameters of the microscope and to optimize the metallographic sample preparation method and its process conditions. Note de contenu : - EXPERIMENTAL MATERIALS AND INSTRUMENTS
- EXPERIMENTAL METHOD : Metallographic sample preparation steps - Image clarity evaluation indicator and its calculating method - Experimental method and steps
- RESULTS AND DISCUSSIONS : Influence of microscope parameters - Optimization of metallographic samples preparation process parametersEn ligne : https://drive.google.com/file/d/1bf3CADTZLMBAls7xzvSFX1y_Gb8DmTrW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28894
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Preparation of wool keratin and application as formaldehyde scavenger for leather products / Zeng Chunhui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Preparation of wool keratin and application as formaldehyde scavenger for leather products Type de document : texte imprimé Auteurs : Zeng Chunhui, Auteur ; Ma Yue, Auteur ; Qi Lu, Auteur Année de publication : 2017 Article en page(s) : p. 202-207 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Déchets organiques -- Recyclage
Extraction par micro-ondes
Formaldéhyde -- Elimination
Fourier, Spectroscopie infrarouge à transformée de
kératinesLa kératine est une protéine, synthétisée et utilisée par de nombreux êtres vivants comme élément de structure, et également l'exemple-type de protéine fibreuse.
La kératine est insoluble, et peut être retrouvée sur l'épiderme de certains animaux, notamment les mammifères, ce qui leur garantit une peau imperméable. Parfois, lors d'une friction trop importante, la kératine se développe à la surface de la peau formant une callosité. Les cellules qui produisent la kératine meurent et sont remplacées continuellement. Les morceaux de kératine qui restent emprisonnés dans les cheveux sont couramment appelés des pellicules.
La molécule de kératine est hélicoïdale et fibreuse, elle s'enroule autour d'autres molécules de kératine pour former des filaments intermédiaires. Ces protéines contiennent un haut taux d'acides aminés à base de soufre, principalement la cystéine, qui forment un pont disulfure entre les molécules, conférant sa rigidité à l'ensemble. La chevelure humaine est constituée à 14 % de cystéine.
Il y a deux principales formes de kératines : l'alpha-kératine, ou α-keratin, présente chez les mammifères notamment, dont l'humain, et la bêta-kératine, ou β-keratin, que l'on retrouve chez les reptiles et les oiseaux. Ces deux types de kératines ne présentent clairement pas d'homologie de séquence.
Chez l'être humain, la kératine est fabriquée par les kératinocytes, cellules se trouvant dans la couche profonde de l'épiderme. Les kératinocytes absorbent la mélanine (pigment fabriqué par les mélanocytes), se colorent et ainsi cette pigmentation de l'épiderme permet de protéger les kératinocytes des rayons ultraviolets du Soleil. (Wikipedia)
LaineIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A Na2S/LiBr/SDS dissolution system was used to dissolve waste wool and extract wool keratin by microwave-assisted technology. The optimization of wool keratin preparation was critically investigated via orthogonal experimental design. Experimental results indicated that microwave time had a far greater effect than other parameters on wool dissolving process. Under the optimal conditions (microwave time : 10 minutes, 0.5mol/L Na2S, pH:10, reaction temperature : 80°C, 0.2mol/L LiBr), the wool dissolution rate (WDR) and keratin extraction rate (KER) were 98.8% and 69.6%, respectively. Wool keratin lias a rich amide structure as shown by FTIR analysis and can be used as free formaldehyde scavenger for leather products. Moreover, the application properties of keratin were evaluated by formaldehyde capture experiments. It turned out that the formaldehyde removal rate (FAR) achieved the highest peak at 52.5% by addition of 4% keratin formaldehyde scavenger (KFS) and a capture time of 1.5 hours. Meanwhile, the leather thickening rate (LTR) increased by 6.36%, which testified that KFS possessed a certain filling effect for leather samples at the same time as removing formaldehyde. Wool keratin might have a great potentiel for application in leather products as environment-friendly formaldehyde scavenger. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Process of waste wool dissolution - Dialysis and purification of wool keratin - FTIR detection of wool keratin - Application of wool keratin as formaldehyde scavenger (KFS) in leather samples
- RESULTS AND DISCUSSION : Orthogonal experiment results - FTIR analysis - Application testingEn ligne : https://drive.google.com/file/d/1-b1C_q9kA48B3obdibodmsG2-8knYFj1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28895
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Code-barres Cote Support Localisation Section Disponibilité 19176 - Périodique Bibliothèque principale Documentaires Disponible Cutting edge tanning or - the tanners lot, 100 years ago / Joe Dewhurst in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)
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Titre : Cutting edge tanning or - the tanners lot, 100 years ago Type de document : texte imprimé Auteurs : Joe Dewhurst, Auteur Année de publication : 2017 Article en page(s) : p. 208-211 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie et commerce -- Royaum-Uni -- Histoire Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : One hundred years ago chemists were making rapid progress in the understanding of tanning processes and, over the last fifty years, the machinery developed by those great Victorien engineers was replacing hand operations. In this atmosphere it was hardly surprising that, in 1902 the International Association of Leather Trades Chemists (IALTC) was formed and published Collegium. In the turbulent times of July 1917 the UK Branch of IALTC split off from the rest of the body to create its own SLTC comprising the main UK section, plus the thriving South African and Australien Sections. To complete the schism, splitting from the original European publication of Collegium, the new journal JSLTC (Journal of the Society of Leather Trades Chemists) was formed. H. R, Procter was the iliustrious editor and contribulors for that year included other wellknown names of that time — H. G. Bennet, J. A. Wilson (known for his theory of the chemistry of leather), J. Beauty (enzymes), Seymour-Jones (physiology of the skin) and M. C. Lamb with a paper on recycling. In 1972 the name was updated and it became the Journal of the Society of Leather Technologists and Chemists. Note de contenu : - IALTC, SLTC, ALCA, BBSATRA, BLMRA AND HATIS - INITIAL DEVELOPMENTS : Materials in short supply - Machinery developments - What were chemists doing ? - Chromium comes on to the scene - Labour relations En ligne : https://drive.google.com/file/d/1eFkf8q5Dz4o21Njp1qqpE8_QlbibssXW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28896
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