Relevant bibliographies by topics / Bleaching materials

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  2. Dissertations / Theses
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Academic literature on the topic 'Bleaching materials'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 July 2024

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Journal articles on the topic "Bleaching materials"

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Wang, Wu Wen, Ji Hong Lao, and Ya Qin Yang. "The Study of Bleaching Silk Sanitary Materials." Advanced Materials Research 175-176 (January 2011): 765–68. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.765.

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The silk Sanitary Materials in hydrogen peroxide bleaching process, various experimental factors affect on the raw materials’ whiteness and tension. And through the single factor experiments and orthogonal test research and analysis, the significant influencing order of the whiteness of silk fiber is: temperature, concentration of hydrogen peroxide, and bleaching time; the significant influencing order of breaking tension is: bleaching time, temperature, and concentration of hydrogen peroxide. The optimum experimental program is as follows: hydrogen peroxide concentration of 22.5g / L, bleaching temperature of 80 °C, bleaching time, 60min, PH value of 9, sodium silicate concentration of 11.25g / L.
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CASTRO, Camila Maria Lima de, Higor Catta Preta BORGES, Karoline Cardoso Ferro BARROS, Natanael Barbosa dos SANTOS, and Larissa Silveira de Mendonça FRAGOSO. "Spectrophotometric assessment of tooth bleaching under orthodontic braquets bonded with different materials." Revista de Odontologia da UNESP 46, no. 5 (October 19, 2017): 267–72. http://dx.doi.org/10.1590/1807-2577.03617.

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Abstract Introduction patients have been submitted to tooth bleaching during orthodontic treatment for aesthetic purposes or to anticipate the replacement of restorations after completion of the treatment. Objective to evaluate the effectiveness of tooth bleaching under orthodontic brackets bonded with different materials. Material and method a hundred bovine enamel blocks were divided into two groups, at-home and in-office tooth bleaching. In-office bleaching was subdivided into five groups (n = 10): HP (control - without brackets); SA(t) - brackets bonded with Transbond XT, without bleaching; SA(fm) - brackets bonded with Orthodontic Fill Magic, without bleaching; HP(t) - brackets bonded with Transbond XT subjected to bleaching; and HP(fm) - brackets bonded with Orthodontic Fill Magic subjected to bleaching. At-home bleaching followed the same treatments, only replacing the bleaching agent. Spectrophotometric assessment was used for tooth color determination at three moments: 1) before staining (baseline); 2) after staining; 3) after bonding the brackets and bleaching procedures. Data were submitted to ANOVA and analyzed by Tukey's test (p < 0.05). Result For both types of bleaching, the control group had an effective bleaching action. Groups using Transbond XT presented greater bleaching potential among the groups with orthodontic accessory, but the bleaching action differed from the positive control. Groups using Orthodontic Fill Magic presented no bleaching action, resembling the negative control groups (artificial saliva). Conclusion the orthodontic bracket impaired the effectiveness of the at-home and in-office bleaching treatment, regardless of the resin used for bonding.
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Taher, Manal, Nsar Aziz, and Intesar Toma. "Effect of bleaching materials and whitening mouth wash on surface roughness of two types of composite resin materials nanohybrid and nanofill: an In‐vitro Study." Erbil Dental Journal 4, no. 2 (December 25, 2021): 118–26. http://dx.doi.org/10.15218/edj.2021.16.

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Background and objective: Bleaching teeth is one of the effective, comparatively safe, aesthetic treatments in dentistry. Many systems are available now in clinical practice that has a peroxide mechanism. The purpose of this study was to evaluate the effect of three different bleaching system on the surface roughness of two different composite resin materials (nanohybride and nanofilled). Methods: A total of 60 samples of two types of composite resin were used (nanohybrid and nanofill), 30 samples for each material were prepared. The total samples then divided into six groups, ten samples for each group. Each group were analyzed and tested before exposing to bleaching system that considered as control, by using surface roughness (Ra) machine using atomic force microscopy. Three bleaching system then used, hydrogen peroxide 35% with laser and carbamide peroxide 10% three times each time for 15 min‐ utes while whitening mouth wash for 1 minute/ day for one month. After bleaching ended, the surface roughness of all the samples were re‐evaluated. Results:Whiting mouth wash thtcontaing peroxide bleaching agents showed a significant differences for the two composite materials(nano hybrid and nano filled). While for the another bleaching systems(hydrogen peroxide and carbamide peroxide) there is no significant differences Conclusion:Whiting mouth wash showed more surface roughness for the two materials when compared with the another bleaching materials and Increased surface roughness of composites as a result of bleaching appears to be dependent on the bleaching agent used as well as the composite material types.
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Razeen, Hadeer Magdy, Mahmoud A. A. Shakal, and Radwa A. El-dessouky. "Evaluation of color changes produced by different bleaching techniques on stained two different ceramic materials." Tanta Dental Journal 20, no. 4 (2023): 275–80. http://dx.doi.org/10.4103/tdj.tdj_13_23.

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Objective The aim of this in vitro study was to evaluate the color changes produced by different bleaching techniques on two different stained ceramic materials. Material and methods The total 40 specimens of IPS e.max and shofu were stained by immersing in coffee 30 min daily for 14 days and color assessment was done by spectrophotometer, then the specimens were divided into two subgroups according to the bleaching technique home bleaching (white smile) and office bleaching (pola office), the bleaching was done according to manufacturer instruction for pola office: an adequate thickness of the bleaching agent by the brush was applied for 8 min. This procedure was repeated for 3 times. And for home bleaching (white smile): specimens were placed in the mold to receive home bleaching agent by immersion 60 min daily for 6 days. Then the color was assessed after bleaching procedure to determine the changes. The data were statistically analyzed by one-way ANOVA test and Correlation analysis. Results Shofu recorded higher staining affinity with mean value 6.72 ± 2.33 than (IPS) e.max group with mean value 4.92 ± 2.08. For bleaching: Shofu HC group home bleaching group recorded higher bleaching affinity with mean value 7.86 ± 1.93 whereas shofu office bleaching group recorded mean value 6.04 ± 0.65. As for e.max home bleaching group recorded also higher ∆ E with mean value 5.68 ± 0.86 whereas e.max office bleaching group recorded mean value 4.37 ± 1.01. And a strong relation was recorded between ∆E1 and ∆E2 in all groups as r greater than 0.5. Conclusion Shofu HC and IPS e.max showed affinity to staining but Shofu HC showed higher stain ability than IPS e.max, Office and home bleaching techniques affected the color of both ceramics materials and home bleaching showed higher significant difference. And Shofu HC showed higher color change after home and office bleaching than IPS e.max.
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Zanconato-Carvalho, Erica Moreno, João Felipe Bruniera, Natália Spadini de Faria, Vivian Colucci, and Danielle Cristine Messias. "Impact of Intracoronal Dentin Treatment Prior to Bleaching on Bond Strength of Restorative Materials." Brazilian Dental Journal 25, no. 6 (December 2014): 519–23. http://dx.doi.org/10.1590/0103-6440201302441.

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Surface treatment of dentin before the bleaching procedure may affect its permeability and influence the bond strength of restorative materials. This study evaluated the influence of surface treatment before the bleaching on shear bond strength (SBT) of restorative materials to intracoronal dentin. Dentin slabs were subjected to surface treatment: no bleaching (control - CON), no surface treatment + bleaching (HP), 37% phosphoric acid + bleaching (PA) and Er:YAG laser + bleaching (L). After the bleaching procedure, specimens (n=10) were restored with: microhybrid composite resin (MH), flowable composite resin (F), and resin-modified glass-ionomer cement (RMGIC). The shear test was carried out. ANOVA and Tukey's test (α=0.05) showed significant difference for surface treatment and restorative materials (p<0.05). CON presented higher STB and was statistically different from HP (p<0.05). PA and L showed intermediate values and were statistically similar to CON and HP (p>0.05). STB for MH and F were higher than RMGIC (p<0.05), and did not differ from each other (p>0.05). The surface treatments with phosphoric acid and Er:YAG laser before the bleaching procedure provided shear bond strength at the same level of unbleached dentin and the composite resins presented superior bond strength to the intracoronal dentin.
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Goldstein, Ronald E. "Bleaching teeth: new materials—new role." Journal of the American Dental Association 115 (December 1987): 44E—52E. http://dx.doi.org/10.14219/jada.archive.1987.0316.

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Wille, T., E. C. Combe, I. J. Pesun, and D. W. Giles. "Rheological characteristics of tooth bleaching materials." Journal of Oral Rehabilitation 27, no. 12 (December 2000): 1060–63. http://dx.doi.org/10.1046/j.1365-2842.2000.00647.x.

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Wille, T., E. C. Combe, I. J. Pesun, and D. W. Giles. "Rheological characteristics of tooth bleaching materials." Journal of Oral Rehabilitation 27, no. 12 (July 7, 2008): 1060–63. http://dx.doi.org/10.1111/j.1365-2842.2000.00647.x.

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Ozdogan, Alper, and Nihan Kaya. "Effectiveness and safety of bleaching agents on lithium disilicate glass ceramics." Journal of Dental Research, Dental Clinics, Dental Prospects 16, no. 4 (December 30, 2022): 251–57. http://dx.doi.org/10.34172/joddd.2022.040.

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Background. Aesthetic expectations have increased the use of aesthetic materials in dentistry. Lithium disilicates are frequently used materials for these expectations. Bleaching is another method used to provide aesthetics. Bleaching processes on restorative materials are not fully known. This study investigated the effect of at-home and in-office bleaching methods on the color change, surface roughness, and topography of lithium disilicate glass-ceramic materials produced with two different techniques and subjected to different polishing procedures. Methods. A total of 144 disc-shaped pressed and computer-aided design (CAD) lithium disilicate glass-ceramic specimens were randomly divided into four groups. Glazing and three different chair-side polishing procedures were performed. The specimens in each group were randomly divided into two groups and subjected to at-home and in-office bleaching processes (n=9). The home bleaching process was repeated with 16% carbamide peroxide agent for six hours for seven days, while the in-office bleaching process was applied with 40% hydrogen peroxide agent for two sessions of 20 minutes. After the bleaching processes, the final color and surface roughness experiments of the specimens were carried out, and the results were recorded. ANOVA and Tukey multiple comparison tests were used FOR the statistical analysis of the data (α=0.05). Results. The material*polish*bleaching, polish*bleaching, material*bleaching, and material*polishing interactions were not statistically significant regarding color and roughness changes of both specimens (P>0.05). Conclusion. Both bleaching processes can be safely applied to lithium disilicate glass-ceramic materials.
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Dziedzic, Dilcele Silva Moreira, Lucia Helena Ramos da Silva, Bruna Luiza do Nascimento, Marina Samara Baechtold, Gisele Maria Correr, and Carla Castiglia Gonzaga. "Effect of hydrogen peroxide application on color and surface roughness of two restorative materials." Brazilian Journal of Oral Sciences 15, no. 3 (August 11, 2017): 185. http://dx.doi.org/10.20396/bjos.v15i3.8649978.

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Aim: This study investigated the effect of an in-office bleaching technique on lightness, color and surface roughness of two commercially available materials: a resin-modified glass-ionomer cement and a nanohybrid resin composite. Methods: Twelve disk-shaped specimens were prepared with both materials. The samples were bleached with 35% hydrogen peroxide. Bleaching was tested initially onto a smooth surface and later onto a polished one of the same specimens. The effect of the treatments on lightness and color was verified with a spectrophotometer. Surface roughness was measured with a digital surface roughness tester. The data were statistically analyzed by repeated measures ANOVA and post hoc Tukey’s test (alpha = 0.05). Results: Significant variation in lightness and color was observed on the resin-modified glass-ionomer cement after the first bleaching procedure. Roughness increased significantly only after polishing the resin-modified glass-ionomer cement surface. Composite color variation was evident in the last observation period, but roughness and lightness variation due to bleaching and polishing was not significant. Conclusion: The bleaching treatment caused significant color alterations on the materials tested. This study observed that the application of in-office bleaching onto the glass-ionomer cement promoted clinically observable color alteration, and polishing after bleaching is contraindicated for this material.
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Dissertations / Theses on the topic "Bleaching materials"

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Ren, Xuehong Buschle-Diller Gisela. "Biomimicking of enzymes for textile processing." Auburn, Ala., 2006. http://repo.lib.auburn.edu/Send%2012-15-07/REN_XUEHONG_37.pdf.

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Tataranni, Piergiorgio <1985&gt. "Experimental application of Waste Bleaching Clays in the production of construction materials for Civil Infrastructures." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/8750/1/Experimental%20application%20of%20Waste%20Bleaching%20Clays%20in%20the%20production%20of%20construction%20materials%20for%20Civil%20Infrastructures_P.Tataranni.pdf.

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The respect for the environment and the saving of natural resources are current problems, which affect all the sectors within a modern society. In the civil engineering field, the main action to overcome these issues is related to the research on innovative solutions, able to combine the environmental benefits with the reduction of costs. As a consequence, the recycling and reuse of wastes and industrial-by products for the production of new materials represent the new frontier in the constructions sector. In the light of the above, the present work shows a laboratory study on the application of a waste digested bleaching clay for the production of materials within civil infrastructures field. The final aim of the project is to give scientific evidence of the use of this industrial-by product as construction material. Furthermore, to combine the dual effect of reducing the quantities of material disposed to landfill with the definition of a functional intended use for this waste. The research project was divided in four macro-activities, each of which is focused on a specific sector of the civil infrastructures. In every activity, the validation of the possible experimental application was given through a full laboratory characterization and by the comparison of results with the requirements imposed by the most common technical specifications for building materials.
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Polydorou, Olga. "The effect of two bleaching products on microhardness and surface texture of different dental aesthetic restorative materials." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972521119.

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Berger, Sandrine Bittencourt. "Efeitos de agentes clareadores de alta concentração para tratamento em consultorio na microdureza, morfologia e composição quimica do esmalte humano." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287820.

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Orientador: Marcelo Giannini
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Vários estudos têm se preocupado com os efeitos adversos produzidos pelos agentes clareadores de uso caseiro e de consultório. Este estudo tem como objetivo avaliar os efeitos de agentes clareadores de alta concentração (peróxido de hidrogênio a 35%) utilizados em consultório na dureza, composição química e estrutural do esmalte humano. Sessenta e cinco terceiros molares humanos hígidos foram utilizados. Dois fragmentos de esmalte (4x4x3mm) foram removidos das faces vestibular e lingual de cada dente. As amostras foram divididas em 10 grupos (n=10). Antes do clareamento, foram polidas e submetidas ao teste de microdureza Knoop (KHN) e análise em Espectroscopia Raman Transformada de Fourier (ERTF) para determinação da relação de fosfato (PO4) e carbonato (CO3) presente no esmalte não tratado. O grupo controle (GC) não foi submetido ao tratamento clareador. Nos grupos experimentais foram utilizados três diferentes agentes clareadores (Whiteness HP Maxx - W; Pola Office ¿ P e Opalescence Xtra - O) bem como três formas de irradiação (sem irradiação - SI; irradiação com lâmpada halógena ¿ LH, irradiação com LED + Laser Diodo - L). Após os tratamentos, os géis clareadores foram coletados com a solução de enxágüe para avaliação da concentração de cálcio, utilizando espectrofometria de absorção atômica. Em seguida, as amostras foram submetidas à ERTF, ao teste de microdureza superficial e interna, observadas em microscopia eletrônica de varredura para analisar as alterações na superfície e avaliadas em microscopia de luz polarizada para analisar os efeitos das técnicas de clareamento na desmineralização superficial do esmalte. As médias de microdureza superficial variaram de 297,48±16,29 (O-SI) a 317,86±9,62 (P-L) antes do tratamento clareador e 260,94±17,17 (OSI) a 291,68±16,20 (W-LH, pós-clareamento). Para a microdureza interna as médias variaram de 69,55±42,02 (O-L, 20ìm) a 288,13±53,16 (GC, 80ìm). Na determinação da composição química do esmalte através de ERTF, para o fosfato a média da área do pico de fosfato variou entre 14,50± 0,32 (O-SI) a 14,90 ± 0,28 (P-LH) antes do tratamento, sendo que após o tratamento variaram entre 14,24 ± 0,72 (P-L) a 15,03 ± 0,23 (P-LH). Para o carbonato valores de: 3,60 ± 0,52 (W-LH) a 4,41 ± 0,67 (P-SI) antes do tratamento foram encontrados. Após o tratamento variaram entre: 3,69 ± 0,29 (GC) a 4,41 ± 0,13 (P-LH). A concentração de cálcio presente na solução de enxágüe variou entre 0,32 (W-SI) a 1,61 (O-L). Na microscopia eletrônica de varredura, com exceção do grupo controle, todos os grupos apresentaram alterações morfológicas na superfície. Em microscopia de luz polarizada, os grupos Whiteness sem irradiação, com luz halógena e LED/laser, Pola Office com LED/laser e Opalescence com luz halógena e LED/laser apresentaram desmineralização em profundidade. Observamos alterações no conteúdo mineral pela diminuição significativa dos valores de microdureza, perda de cálcio e desmineralização visualizada em microscopia de luz polarizada, além de alterações morfológicas na superfície do esmalte visualizadas em microscopia eletrônica de varredura. Concluímos que a utilização do peróxido de hidrogênio a 35% empregado no tratamento clareador em consultório requer cautela uma vez que, causa alterações na estrutura do esmalte como mostrado no presente estudo
Abstract: Several studies have been concerned with the adverse effects produced by home applied and in-office bleaching treatments. The aim of this study is to evaluate the effects of highconcentrated bleaching agents (35% hydrogen peroxide) on human enamel microhardness, chemical and structural composition. Sixty and five human third molars human were used. Two enamel blocks (4x4x3mm) were obtained from bucal and lingual surfaces of each tooth. The samples were divided in 10 groups (n=10). Before the bleaching treatment, samples were polished and submitted to microhardness test (Knoop) and Fourier Transform Raman Spectroscopy (FTRS) analysis in order to determine the concentration of phosphate (PO4) and carbonate (CO3) present the enamel. Control group (CG) was not submitted to the bleaching treatment. In the remaining experimental groups three different bleaching agents were used (Whiteness HP Maxx - W; Pola Office ¿ P and Opalescence Xtra - O) and three ways of irradiation (no light irradiation - N; irradiation with halogen light - HL and irradiation with LED + Diode Laser - L). After the treatments, the rinsing water solution was to evaluate the concentration of calcium, by means of atomic absorption spectrometry analysis. Afterwards, the samples were re-submitted to FTRS and to surface and cross-sectional microhardness measurement. Samples were observed in scanning electron microscopy to observe surface alterations and in polarized light microscopy to examine the effects of the bleaching techniques in the demineralization of the enamel. The average surface microhardness values microhardness ranged from 297.48±16.29 (O-N) to 317.86±9.62 (P-L) before the bleaching treatment and 260.94±17.17 (O-N) to 291.68±16.20 (W-HL) after bleaching. The mean values obtained after cross-sectional microhardness measurement ranged from 69.55±42.02 (O-L, 20µm) to 288.13±53.16 (CG, 80 µm). The phosphate concentration on enamel determined by means of FTRS ranged from 14.50±0.32 (O-N) to 14.90±0.28 (P-HL) before the treatment. After the treatment the phosphate concentration ranged from 14.24±0.72 (P-L) to 15.03±0.23 (P-HL). The concentration of carbonate present on treated enamel ranged from 3.60±0.52 (WHL) to 4.41±0.67 (P-N) before the treatment and after the treatment, the concentration varied from 3.69±0.29 (CG) to 4.41±0.13 (P-LH). The concentration of calcium in the rinsing water solution ranged from 0.32 (W-N) to 1.61 (O-L). The scanning electron microscopy showed that all groups presented morphologic alterations in the surface, except for the control group. The images obtained after polarized light microscopy showed that Whiteness without irradiation, with halogen light and LED/diode laser, Pola Office with LED/diode laser and Opalescence with halogen light and LED/diode laser presented demineralization. Alterations on enamel mineral content, significant decrease of enamel microhardness and calcium concentration, demineralization observed by means of polarized light microscopy and morphological alterations on enamel observed by means of scanning electron microscopy were observed in the present study. In conclusion, the use of the 35% hydrogen peroxide as a bleaching agent in clinical situations requires caution, since it may cause alterations on enamel structure as observed in the present study
Mestrado
Mestre em Materiais Dentários
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Yui, Karen Cristina Kazue. "Avaliação in vitro da efetividade de associações de agentes clareadores na alteração da cor de dentes manchados por pigmentos sangüineos /." São José dos Campos : [s.n.], 2006. http://hdl.handle.net/11449/101354.

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Orientador: José Roberto Rodrigues
Banca: Marianne Spalding
Banca: Maria Antonio Pereira
Banca: Sérgio Eduardo de Paiva Gonçalves
Banca: Maria Amélia Máximo de Araújo
Resumo: O objetivo deste estudo foi avaliar in vitro a efetividade de três associações de materiais clareadores na técnica mediata de clareamento de dentes tratados endodonticamente. Foram utilizados 48 pré-molares humanos íntegros, pigmentados artificialmente com sangue humano. Após preparo biomecânico, os canais radiculares foram obturados e o tampão cervical foi confeccionado com 3mm de cimento de fosfato de zinco ao nível da junção amelo-cementária. Os dentes foram divididos em quatro grupos (n=12): C (controle, sem material clareador), A1 (perborato de sódio + água destilada), A2 (perborato de sódio + peróxido de carbamida a 10%) e A3 (perborato de sódio + peróxido de carbamida a 35%). Os materiais clareadores foram trocados aos sete e 14 dias. Concluiu-se que o perborato de sódio associado ao peróxido de carbamida (tanto a 10%, como a 35%) foi mais efetivo do que quando associado à água destilada.
Abstract: The aim of this study was to evaluate in vitro the effectiveness of three associations of bleaching agents on artificially stained pulpless teeth. Forty-eight recently extracted intact human premolars were stained by immersing them in human blood, and divided into four groups. All teeth were endodontically treated and 3mm of zinc phosphate cement was placed at the cementoenamel junction. The teeth were divided into one control group and three test groups (n=12): C) control group, without bleaching agent, A1) sodium perborate with water, A2) sodium perborate with 10% carbamide peroxide, A3) sodium perborate with 35% carbamide peroxide. On days 7 and 14, each pulp chamber was refilled with fresh bleaching paste. Color coordinates of CIELAB color system were measured and assessed with the aid of a dental spectrophotometer (EasyShade®, Vita). It was concluded that sodium perborate mixed with carbamide peroxide (10% or 35%) was more effective than mixed with water.
Doutor
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PINHEIRO, LAURA F. M. "Avaliação da resistência a micro-tração da resina composta no esmalte após clareamento dental. Influência da irradiação com o laser de Er:YAG e o tipo do sistema adesivo." reponame:Repositório Institucional do IPEN, 2007. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11647.

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Dissertacao (Mestrado Profissionalizante em Lasers em Odontologia)
IPEN/D-MPLO
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP; Faculdade de Odontologia, Universidade de Sao Paulo, Sao Paulo
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Yui, Karen Cristina Kazue [UNESP]. "Avaliação in vitro da efetividade de associações de agentes clareadores na alteração da cor de dentes manchados por pigmentos sangüineos." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/101354.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste estudo foi avaliar in vitro a efetividade de três associações de materiais clareadores na técnica mediata de clareamento de dentes tratados endodonticamente. Foram utilizados 48 pré-molares humanos íntegros, pigmentados artificialmente com sangue humano. Após preparo biomecânico, os canais radiculares foram obturados e o tampão cervical foi confeccionado com 3mm de cimento de fosfato de zinco ao nível da junção amelo-cementária. Os dentes foram divididos em quatro grupos (n=12): C (controle, sem material clareador), A1 (perborato de sódio + água destilada), A2 (perborato de sódio + peróxido de carbamida a 10%) e A3 (perborato de sódio + peróxido de carbamida a 35%). Os materiais clareadores foram trocados aos sete e 14 dias. Concluiu-se que o perborato de sódio associado ao peróxido de carbamida (tanto a 10%, como a 35%) foi mais efetivo do que quando associado à água destilada.
The aim of this study was to evaluate in vitro the effectiveness of three associations of bleaching agents on artificially stained pulpless teeth. Forty-eight recently extracted intact human premolars were stained by immersing them in human blood, and divided into four groups. All teeth were endodontically treated and 3mm of zinc phosphate cement was placed at the cementoenamel junction. The teeth were divided into one control group and three test groups (n=12): C) control group, without bleaching agent, A1) sodium perborate with water, A2) sodium perborate with 10% carbamide peroxide, A3) sodium perborate with 35% carbamide peroxide. On days 7 and 14, each pulp chamber was refilled with fresh bleaching paste. Color coordinates of CIELAB color system were measured and assessed with the aid of a dental spectrophotometer (EasyShade®, Vita). It was concluded that sodium perborate mixed with carbamide peroxide (10% or 35%) was more effective than mixed with water.
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Finell, Michael. "The use of reed canary-grass (Phalaris arundinacea) as a short fibre raw material for the pulp and paper industry /." Umeå : Unit of Biomass Technology and Chemistry, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a424.pdf.

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Kiklis, Zoe. "Chemical Dental Plaque Control: Chlorhexidine Tooth Staining and Efficacy of Common Whitening Procedures." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/scripps_theses/336.

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Chlorhexidine mouth rinses remove dental plaque from teeth, preventing dental caries, dental decay, and more serious systemic infections. Tooth discoloration due to extrinsic staining is the most prominent side effect of regular chlorhexidine use. Decreasing the concentration of chlorhexidine reduces staining area and severity. Staining can also be prevented and treated by tooth bleaching, a common cosmetic dental procedure that diminishes extrinsic staining by oxidizing chromagens adsorbed onto the tooth surface. In the proposed trial, common bleaching agents will be investigated for their efficacies in preventing chlorhexidine staining. Results of the trial could further the development of a chlorhexidine mouth rinse that is suitable for long term use.
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O'Brien, Simona. "Characterising the deformation behaviour of human tooth enamel at the microscale." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2013. https://ro.ecu.edu.au/theses/566.

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Enamel plays an important role in tooth function. Optimal combinations of composition and structure endow enamel with unique mechanical properties that remain largely unexplored. Specifically, more detailed understanding of the loadbearing ability of enamel is needed to mimic it synthetically and to design next generation biocomposite materials. This research investigates the variables that influence deformation behaviour of tooth enamel in relation to its hierarchical structure. Initially, a new method was developed for preparing flat, finely polished tooth samples that were maintained in their normal hydrated state for nanoindentation testing. In contrast to conventional methods, which commonly utilise either inappropriate or excessive drying and/or chemically based embedding media (i.e., resins, glues), a novel embedding process was developed using an aqueous putty compound. Additionally, a custom-designed holder was manufactured for mounting wet tooth specimens on the nanoindentation stage that eliminated the need for hot wax or glue during testing. Considering that enamel is a functionally graded material that has different values of Young’s modulus (E) and hardness (H) over the enamel thickness, a new approach of data analysis was developed for interpreting the mechanical properties of enamel at a range of fixed constant indentation depths. Resultant functions were used for predictive purposes. The values of E and H obtained from the nanoindentation instrument demonstrated a well-known decreasing gradient from the enamel occlusal surface towards the enamel-dentine junction (EDJ). In contrast to studies using conventional methods, this research showed that both properties also decreased with increasing depths at fixed locations. Furthermore, experimental results showed that resin embedding had detrimental effects on the E and H of enamel (i.e., both properties decreased with increasing depth), but had positive effects on both mild and severe wear resistance parameters (i.e., both parameters increased with increasing depth). When contrasted against the mechanical properties of enamel samples prepared using conventional protocols, this study postulates that the new hydrated method has, for the first time, revealed the genuine E and H properties of this tissue. The effects of sample preparation methods on tooth microstructure, especially along the EDJ, were investigated with optical microscopy and scanning electron microscopy (SEM). The new method of sample preparation combined with a careful dehydration process maintained the integrity of the EDJ interface even after applying multiple Berkovich indents up to maximum load of 400 mN. In contrast, the EDJ and the enamel surface were commonly separated and fractured in teeth that had been resin-embedded. Accordingly, the new method of sample preparation proved to be reliable for investigating the genuine microstructural characteristics of teeth. The behaviour of the elastic region in tooth enamel was investigated with analytical and finite element models. The models were fitted into experimental values of E obtained from nanoindentation tests with a Berkovich indenter to identify a relationship between the mechanical responses of enamel under different loading conditions and microstructure. The decrease in E for enamel with increasing indentation depth was related to its enhanced load-bearing ability. The change of E was directly linked to the microstructural evolution (i.e., the rotation of mineral crystals) of enamel. The effective crystal orientation angle was found to be between 44o and 48o for indentation depths from 0.8 and 2.4 μm below according to the analytical model. The range of angles facilitated the shear sliding of mineral crystals and reduced the stress level as well as the volume of material under higher loads. The behaviour of the plastic region in healthy enamel was investigated with finite element models fitted to nanoindentation data obtained with a Berkovich indenter to determine deformation mechanisms that result in excellent mechanical responses for tooth enamel during loading. When nanoindentation was conducted with increasingly applied loads but at a fixed location, the values of H decreased with increasing indentation depth. The decreasing trend in H was simulated by finite element models and showed a reduction in stress level and yield strength with increasing load. This key mechanism of the loading dependence of mechanical properties resulted in remarkable enamel resilience and was related to the change of effective crystal orientation angle within the enamel microstructure. The mechanical behaviour of enamel with respect to its microstructure was also investigated on teeth exposed to commercially available whitening treatments (tooth bleaching). Enamels exposed to a 6% bleaching treatment exhibited degraded mechanical properties (E and H) compared to unbleached controls. Furthermore, the creep and recovery responses of bleached enamel were also significantly reduced compared to controls. To determine the variables regulating tooth enamel deformation mechanisms during whitening treatments, analytical models were fitted to stress-strain curves. The effective crystal orientation angle of healthy enamel and the protein shear stress, τc, were identified as 50o and 2.5 % of the transverse stiffness of a staggered composite (E2), respectively. After the bleaching treatment, the effective crystal orientation angle of enamel increased to 54o for τc = 1.5 % of E2. Notably, bleaching reduced shear (τc) by 40 % compared to normal readings for unbleached controls. The changes in mechanical responses of bleached enamel were linked to the decrease of the shear bearing ability of protein components in the enamel microstructure. It is envisaged that these findings will provide new perspectives on applications of bleaching treatments and lead to the development of bleaching agents with less damaging effects to healthy enamel. This work should stimulate new interest in understanding the deformation behaviour of tooth enamel at small scales, and offer new methods for the collection and analysis of data from samples prepared close to their native state, upon which novel and biologically relevant high-performance biocomposite materials can be engineered.
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Books on the topic "Bleaching materials"

1

Best, A. K. Dyeing and bleaching natural fly-tying materials. 2nd ed. Guilford, Conn: Lyons Press, 2004.

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Best, A. K. Dyeing and bleaching natural fly-tying materials. New York, N.Y: Lyons & Burford, 1993.

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Koester, Ardis W. Selecting and using laundry aids. Corvallis, Or: Extension Service, Oregon State University, 1989.

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Evans, P. D. Bleaching treatments for blue-stained mountain pine beetle lodgepole pine. Victoria, B.C: Mountain Pine Beetle Initiative, 2005.

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Odendahl, Sandra M. Chlorinated organic material in pulp bleaching effluents. Ottawa: National Library of Canada, 1990.

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Chlorinated isocyanurates from China and Spain: Investigations nos. 731-TA-1082 and 1083 (review). Washington, D.C: U.S. International Trade Commission, 2010.

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J. Merritt (Joseph Merritt) 1 Matthews. Bleaching And Related Processes As Applied To Textile Fibers And Other Materials. Arkose Press, 2015.

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Heermann, Paul. Dyers' Materials; An Introduction to the Examination, Evaluation and Application of the Most Important Substances Used in Dyeing, Printing, Bleaching and Finishing. Franklin Classics Trade Press, 2018.

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The 2006-2011 World Outlook for Receipts for Dressing-And-Dyeing and Bleaching Furs Performed In-Plant on Materials Owned by Others. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Receipts for Dressing-And-Dyeing and Bleaching Furs Performed In-Plant on Materials Owned by Others. ICON Group International, Inc., 2006.

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Book chapters on the topic "Bleaching materials"

1

Wang, Xiao Jie, Arndt Klocke, Boriana Mihailova, R. Stosch, B. Güttler, and Ulrich Bismayer. "Effect of Bleaching on Dental Hard Tissues: A Raman and IR Spectroscopic Study." In Key Engineering Materials, 1405–8. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.1405.

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Wijaya, Hastono, Wirabbany Rukmana, Femiana Gapsari, Francisca G. U. Dewi, Putu Hadi Setyarini, Thesya M. Putri, and Clarissa Ratusima Arifi. "Characterization of Muntingia calabura Fiber as a Composite Reinforcement with Bleaching Variation." In Springer Proceedings in Materials, 119–30. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5567-1_9.

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Bastos Andrade, C. G., S. M. Toffoli, and F. R. Valenzuela Diaz. "Adsorption and Surface Area of Modified Bentonite Used as Bleaching Clay." In The Minerals, Metals & Materials Series, 333–41. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72484-3_36.

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de Souza, Marcella Fernandes, Ricardo Sposina Sobral Teixeira, Ayla Sant’Ana da Silva, Viridiana Santana Ferreira-Leitão, and Elba Pinto da Silva Bon. "Chlorine-Free Biomass Processing: Enzymatic Alternatives for Bleaching and Hydrolysis of Lignocellulosic Materials." In Chemistry Beyond Chlorine, 241–68. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30073-3_8.

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Ahmad, Nur Maisarah, Nurul Shafinah Foo, Soh Kheang Loh, Khaliesah Abbas, Siew Kooi Ong, Nazatulshima Hassan, Abbas Fadhl Mubarek Al-Karkhi, Mustapha Mohammed Bello, and Robert Thomas Bachmann. "Nutrient Recovery from Anaerobic Palm Oil Mill Effluent Using Palm Kernel Shell Biochar and Deoiled Spent Bleaching Earth and Their Effect on Oil Palm Growth." In Advanced Structured Materials, 81–104. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-21959-7_7.

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Said, Sarra, Imed Feki, Mohamed Hamdaoui, Sabri Halaoua, and Walid Sahraoui. "Investigation and Optimization of a New Bleaching Process for Sulfur-Dyed Denim Fabric." In Proceedings of the Second International Conference of Innovative Textiles and Developed Materials-ITDM’2; 05-06 May 2023; Tunisia, 37–50. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-7950-9_4.

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Afzan, M., A. M. Ithnin, and W. Jazair. "Combustion Performance and Exhaust Emission Analysis of Spent Bleaching Earth (SBE) Oil as Burner’s Fuel." In Proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials, 713–21. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4481-1_68.

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Sharma, Arvind, Gunjan Dhiman, Priti S. Lal, and M. K. Gupta. "Environmental Impact of Application of Ozone Bleaching for Production of Pulp from Agro Based Fibrous Materials—An Innovative Approach." In Advances in Chemical, Bio and Environmental Engineering, 529–40. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96554-9_35.

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Atar, Musa, Hamza Çınar, and Hakan Keskin. "Impacts of Bleaching and Varnishing Process on the Amount of CO2 in Scotch Pine (Pinus sylvestris Lipsky) Wood Material." In Lecture Notes in Civil Engineering, 455–68. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-63709-9_37.

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"The bleaching materials." In Bleaching Techniques in Restorative Dentistry, 41–70. CRC Press, 2001. http://dx.doi.org/10.3109/9780203417430-8.

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Conference papers on the topic "Bleaching materials"

1

McCall, R. P., J. M. Ginder, J. M. Leng, H. J. Ye, Arthur J. Epstein, W. E. Farneth, E. M. McCarron, and S. I. Shah. "Photoinduced absorption spectroscopy as a probe of electronic states in high Tc material systems." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.ws1.

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Optical and infrared absorption and photoinduced absorption studies of the high T c families of materials give insight into the types of charged excitation existing in these materials, as well as the nature of their ground states and mechanisms for superconductivity. Near steady state photoinduced optical absorption spectra on thin films and pressed KBr pellets of YBa2- CU3O7-δ for δ ~ 0.7 show two absorption peaks below ~1.5 eV and a crossover to photoinduced bleaching at higher energies. Photoinduced infrared spectra reveal several absorption and bleaching modes and a broad electronic transition centered at ~1000 cm-1. The photoinduced bleaching modes correspond to direct absorption modes of the semiconducting YBa2Cu3O6.3 material. The photoinduced absorption modes correspond to direct absorption modes of the superconducting YBa2Cu3O7 material. The presence of the photoinduced IR modes and the higher lying absorptions and bleachings shows that long-lived, stable electronic defect states lying within the energy gap are created.
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Sukirno, Ade Sari Triana, and Muhammad Rifqi. "Biolubricant from spent bleaching earth oil through propylene glycol ester synthesis." In INTERNATIONAL CONFERENCE ON TRENDS IN MATERIAL SCIENCE AND INVENTIVE MATERIALS: ICTMIM 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0014134.

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Kasymdzhanov, M. A., Pulat K. Khabibullaev, Saidiislam S. Kurbanov, and Erkin A. Zakhidov. "UV-laser coloration and bleaching of unirradiated and λ-irradiated silica glasses." In Laser-Induced Damage in Optical Materials: 2000, edited by Gregory J. Exarhos, Arthur H. Guenther, Mark R. Kozlowski, Keith L. Lewis, and M. J. Soileau. SPIE, 2001. http://dx.doi.org/10.1117/12.425004.

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Onem, Ersin, and Ali Yorgancioglu. "Decolorization of Chromium and Dyeing Spots on Leather by Bleaching Agents." In The 6th International Conference on Advanced Materials and Systems. INCDTP - Division: Leather and Footwear Research Institute, Bucharest, RO, 2016. http://dx.doi.org/10.24264/icams-2016.iii.12.

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Ma, Shihong, Huiqing Jia, Xingze Lu, and Wencheng Wang. "Photoinduced bleaching and temporal stability of organic nonlinear optical materials in Langmuir-Blodgett films." In Photonics China '98, edited by Chuangtian Chen. SPIE, 1998. http://dx.doi.org/10.1117/12.318266.

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Petrauskas, Mindaugas, Saulius Juodkazis, Magnus Willander, and Aziz Quacha. "Nonequilibrium charge carriers recombination, diffusion peculiarities, and bleaching in InGaAs(P) epitaxial layers." In Physical Concepts of Materials for Novel Optoelectronic Device Applications II, edited by Fabio Beltram and Erich Gornik. SPIE, 1993. http://dx.doi.org/10.1117/12.162765.

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Björklund Jansson, Marianne, Ernst L. Back, and Mats I. Tufvesson. "A Review of Kraft Pulp Deresination and Pitch Problems." In Papermaking Raw Materials, edited by V. Punton. Fundamental Research Committee (FRC), Manchester, 1985. http://dx.doi.org/10.15376/frc.1985.2.729.

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Knowledge on the oleophilic, resinous, extractives of wood with their relevance to pulping, paper making and paper properties is summarized. The main physical and chemical features of the two types of wood resin – the one in resin canals and the one in parenchymatous cells, mainly within the rays – are reviewed in respect to the above mentioned theme. These features are also analyzed with special reference to alkaline deresination and pitch problems. Difficulties in washing out resin after kraft pulping due to the effects of ionic strength and Ca-ions are discussed as well as deresination in bleaching operations. Present pitch problems in paper making and control measures are reviewed. Effects of wood resin on paper properties e.g. deposits in laser printers and smell or taste in board for liquid containers are discussed.
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Sukirno and Luki Farhandika. "Synthesis and characterization of ethylene glycol ester from spent bleaching earth oil and ethylene glycol as hydraulic lubricants." In INTERNATIONAL CONFERENCE ON TRENDS IN MATERIAL SCIENCE AND INVENTIVE MATERIALS: ICTMIM 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0021783.

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Sun, Xianqi, Haizhen Shi, Jianfeng Ji, and Lichun Zhou. "Continuous Chemical Supplement, a Novel Solution to Improve the Efficiency of Peroxide Bleaching." In 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/ifeesm-17.2018.150.

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Page, D. H., R. S. Seth, and F. El-Hosseiny. "Strength and Chemical Composition of Wood Pump Fibres." In Papermaking Raw Materials, edited by V. Punton. Fundamental Research Committee (FRC), Manchester, 1985. http://dx.doi.org/10.15376/frc.1985.1.77.

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An analysis of published work, together with new data, has clarified the effect of chemical composition on the strength of wood pulp fibres. Among fibres of low fibril angle, and in nondegrading pulping processes, strength (expressed as breaking stress) is directly proportional to α-cellulose content over a wide yield range. This implies that the cellulose fibrils are the sole tensile-load-bearing elements; hemicellulose and lignin only serve as a matrix that transfers the stress under shear from fibril to fibril. However, pulping to a yield corresponding to an α-cellulose content higher than 80% tends to reduce fibre strength apparently because of the elimination of this stress-equalizing matrix. In cellulose-degrading processes, fibre strength falls below this expectation to an extent dependent upon the degradation. Thus a tool is provided that permits the degradative effect of new pulping or bleaching processes on fibre strength to be assessed. The value of zero-span strength as an index of fibre strength is confirmed.
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Reports on the topic "Bleaching materials"

1

Berkowitz, Jacob F., Christine M. VanZomeren, Jaybus J. Price, and Anthony M. Priestas. Incorporating Color Change Propensity into Dredged Material Management to Increase Beneficial Use Opportunities. Engineer Research and Development Center (U.S.), December 2020. http://dx.doi.org/10.21079/11681/39261.

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Dredged materials provide a number of beneficial use opportunities, including beach nourishment, habitat creation and restoration, and other activities. In situ sediment color is important for determining aesthetic and habitat suitability, for beach nourishment, and for other projects. However, dredged materials must meet locally established color compatibility requirements (for example, material cannot be too dark). Often, potential sediment sources are close to meeting specified color thresholds, and previous observations suggest that sediments lighten over time. In response to these observations, this study quantified sediment color change potential in a dredged m aterial management context. Results indicate that dredged material sediment color responded to changes in secondary color components, sediment mixing, and photolytic bleaching improving the sediment color for beneficial use application. Findings allowed for development of a conceptual color change capacity framework and supported development of tools for resource managers to incorporate color change dynamic into planning and operations activities.The following report provides a framework for determining the color change capacity of dredged materials using (1) a comprehensive laboratory approach and (2) a semiquantitative index based on source material and placement location conditions. These tools allow practitioners to incorporate dredged-material color change into resource management decisions, thus increasing beneficial use opportunities.
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