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Relevant bibliographies by topics / Sulfate(lauryl)

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Academic literature on the topic 'Sulfate(lauryl)'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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Journal articles on the topic "Sulfate(lauryl)"

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Fiume, Monice, Wilma F. Bergfeld, Donald V. Belsito, Curtis D. Klaassen, James G. Marks, Ronald C. Shank, Thomas J. Slaga, Paul W. Snyder, and F. Alan Andersen. "Final Report on the Safety Assessment of Sodium Cetearyl Sulfate and Related Alkyl Sulfates as Used in Cosmetics." International Journal of Toxicology 29, no. 3_suppl (May 2010): 115S—132S. http://dx.doi.org/10.1177/1091581810364665.

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Sodium cetearyl sulfate is the sodium salt of a mixture of cetyl and stearyl sulfate. The other ingredients in this safety assessment are also alkyl salts, including ammonium coco-sulfate, ammonium myristyl sulfate, magnesium coco-sulfate, sodium cetyl sulfate, sodium coco/hydrogenated tallow sulfate, sodium coco-sulfate, sodium decyl sulfate, sodium ethylhexyl sulfate, sodium myristyl sulfate, sodium oleyl sulfate, sodium stearyl sulfate, sodium tallow sulfate, sodium tridecyl sulfate, and zinc coco-sulfate. These ingredients are surfactants used at concentrations from 0.1% to 29%, primarily in soaps and shampoos. Many of these ingredients are not in current use. The Cosmetic Ingredient Review (CIR) Expert Panel previously completed a safety assessment of sodium and ammonium lauryl sulfate. The data available for sodium lauryl sulfate and ammonium lauryl sulfate provide sufficient basis for concluding that sodium cetearyl sulfate and related alkyl sulfates are safe in the practices of use and concentration described in the safety assessment.

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Jeong, Hwa-Young, Sang-Hee Jeong, and Mi-Ae Jeong. "A Study on Variations of Halitosis According to Sodium Lauryl Sulfate Content of Toothpaste." Journal of the Korea Academia-Industrial cooperation Society 11, no. 8 (August 31, 2010): 2935–41. http://dx.doi.org/10.5762/kais.2010.11.8.2935.

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Antonova, Irina Nikolayevna, Vladimir Vladimirovich Grishin, and Yuriy Dmitriyevich Ignatov. "Comparative efficacy of toothpastescontaining sodium lauryl sulfate and lecithin." Reviews on Clinical Pharmacology and Drug Therapy 11, no. 1 (March 15, 2013): 50–54. http://dx.doi.org/10.17816/rcf11150-54.

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In the article the effect of sodium lauryl sulfate, and lecithin on the enamel of the tooth and the comparative analysis of efficiency of use of toothpaste with lecithin and other components similar to toothpaste with sodium lauryl sulfate, which is significantly more efficient pasta with lecithin. In addition to significant improvements in dental index, pasta with lecithin showed bleaching properties of the enamel of the tooth and the ability to gradually remove tartar.

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Yachna, M. G., O. B. Meched, O. P. Tretyak, and B. V. Yakovenko. "ВМІСТ ФОСФОЛІПІДІВ У ТКАНИНАХ КОРОПА ЛУCКАТОГО (CYPRINUS CARPIO L.) ЗА ДІЇ НАТРІЙ ЛАУРИЛСУЛЬФАТВМІСНОГО ТА БЕЗФОСФАТНОГО СИНТЕТИЧНИХ МИЮЧИХ ЗАСОБІВ." Scientific Issue Ternopil Volodymyr Hnatiuk National Pedagogical University. Series: Biology 76, no. 2 (July 26, 2019): 48–52. http://dx.doi.org/10.25128/2078-2357.19.2.8.

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The biological laws of adaptation of fish to the action of surfactants are studied. Changes in the content of phospholipids in the gills, brain, liver and skeletal muscle of the scaly carp (Cyprinus carpio L.) under the influence of sodium lauryl sulfate and nonphosphate synthetic detergent have been studied. Ambiguous mediated changes in indicators were identified under the action of toxicants. Such changes can be caused by both the direct action of surfactants on the body of hydrobionts and the peculiar restructuring of the lipid bichar in the direction of counteracting the influence of toxicants. With the experimental introduction of sodium lauryl sulfate-containing synthetic detergent and non-phosphate synthetic detergent into aquarium water, changes in the activity of phospholipids occur in all test tissues of the carp. When applying lauryl sulfate, we observe almost uniform effect on all investigated fabrics. With the tendency to increase, we observe indicators in the brain and white muscles, but with a tendency to decrease in the liver and gills. As for the effect of lauryl sulfate on the tissue, we observe the greatest importance in the liver tissues and uniform effect on the white muscle, brain and gills of the carp.

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Bidevkina, M. V., M. I. Golubeva, A. V. Limantsev, I. N. Razumnaya, T. N. Potapova, and E. A. Fedorova. "ASSESSMENT OF THE TOXICITY AND HAZARD OF SODIUM LAURYL SULFATE AT DIFFERENT EXPOSURE ROUTES." Toxicological Review, no. 4 (August 1, 2020): 56–59. http://dx.doi.org/10.36946/0869-7922-2020-4-56-59.

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Sodium lauryl sulfate is the most common surfactant used in the production of detergents, chloroprene rubber, plastics, artificial furs and in pharmaceutical industry. Sodium lauryl sulfate is a moderately hazardous substance when introduced into the stomach (DL50 for white mice and rats is in the range of 2086-2700 mg/kg), has a pronounced local irritant effect on the skin and mucous membranes of the eyes, has a skin-resorptive, sensitizing and pronounced cumulative effects. The threshold for acute inhalation action is set at 15,3 mg/m3 for changes in the function of the nervous system and irritating effects on the mucous membranes of the upper respiratory tract (an increase in the total number of cells in the nasal flushes).Recommended for approval tentative safe exposure level of sodium lauryl sulfate in the air of the working area is 0.2+ mg/m3 (aerosol).

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Agner, T., and P. Elsner. "Sodium lauryl sulfate: a never ending story?" British Journal of Dermatology 183, no. 1 (December 25, 2019): 13. http://dx.doi.org/10.1111/bjd.18787.

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Huang, Chun-Ming, Chao-Cheng Wang, Mikako Kawai, Stephen Barnes, and Craig A. Elmets. "Surfactant Sodium Lauryl Sulfate Enhances Skin Vaccination." Molecular & Cellular Proteomics 5, no. 3 (November 28, 2005): 523–32. http://dx.doi.org/10.1074/mcp.m500259-mcp200.

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Lee, Cheol Heon, and Howard I. Maibach. "The sodium lauryl sulfate model: an overview." Contact Dermatitis 33, no. 1 (July 1995): 1–7. http://dx.doi.org/10.1111/j.1600-0536.1995.tb00438.x.

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Rucker, James W., and David M. Cates. "2,2î-Bipyridine Catalyzed Bleaching of Cotton Fibers with Peracetic Acid." Textile Research Journal 58, no. 3 (March 1988): 148–60. http://dx.doi.org/10.1177/004051758805800305.

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Peracetic acid can be catalyzed to bleach cotton fibers at temperatures as low as 30°C by incorporating 2,2î-bipyridine in the bleach solution if the appropriate concentration of ferrous ions is present in the cotton fibers. The tris-2,2î-bipyridine ferrous ion complex (trischelate) is the catalytically active species, and sodium lauryl sulfate functions as a stabilizer for the peracid in the presence of the trischelate. The effects of pH, temperature, and concentrations of 2,2î-bipyridine, sodium lauryl sulfate, and ferrous ions on the kinetics and mechanism of peracetic acid decomposition have been investigated. Peracetic acid decomposition in the bleach solution is due mainly to alkaline hydrolysis without added ferrous ions and catalysis by the trischelate complex in solutions containing added ferrous ions. Overall decomposition follows the rate expression where k1 is the specific rate constant for alkaline hydrolysis and k3 is the specific rate constant for catalytic decomposition by the trischelate in the presence of sodium lauryl sulfate.

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Sulek, Marian W., Tomasz Wasilewski, and Krzysztof J. Kurzydłowski. "The Effect of Concentration on Lubricating Properties of Aqueous Solutions of Sodium Lauryl Sulfate and Ethoxylated Sodium Lauryl Sulfate." Tribology Letters 40, no. 3 (July 25, 2010): 337–45. http://dx.doi.org/10.1007/s11249-010-9668-3.

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Dissertations / Theses on the topic "Sulfate(lauryl)"

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Ade-Browne, Chandra. "Understanding Surfactant Skin Irritation by Probing the Relationship between the Structure and the Function of Micelles." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523629545916627.

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Chalamuri, Shanmuka Harish. "The Evaluation of the Effect of Anionic and Cationic Surfactants on the Hindered Settling of Light Calcium Carbonate Suspensions." University of Toledo Health Science Campus / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=mco1418602604.

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Coelho, Katiuscia da Silva. "Estudos ecotoxicológicos com ênfase na avaliação da toxicidade de surfactantes aniônicos aos cladóceros Daphnia similis, Ceriodaphnia dubia e Ceriodaphnia silvestrii." Universidade Federal de São Carlos, 2008. https://repositorio.ufscar.br/handle/ufscar/1938.

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The main anionic surfactants world widely used are the sodium dodecyl benzene sulfonate (LAS) and sodium dodecyl sulfate (DSS), which are mainly used in the manufacturing of domestic and personal hygiene products. As a consequence of the great and increasing consumption of LAS and DSS there is an increasing wareness regarding the adverse effects of these compounds to the organisms and environment. The present study aimed to evaluate the acute and chronic toxicity of the compounds LAS and DSS to the cladocerans Daphnia similis, Ceriodaphnia dubia and Ceriodaphnia silvestrii. It was also evaluated the toxicity of the water and sediments of four reservoirs and one stream of São Paulo State Analyses of LAS concentrations in the water of these reservoirs were also performed by Liquid chromatography. Acute toxicity tests indicated a value of CE(I)50;48h for LAS of 14.17 mg L-1 to D. similis, 11.84 mg L-1 to C. dubia and 13.51 mg L-1 to C. silvestrii. Significant changes in the viability of the cladoceran offsprings were observed for C. dubia and C. silvestrii exposed to the LAS, with values of CENO equal to 1.0 mg L-1 to C. dubia and 2.5 mg L-1 to C. silvestrii. It was concluded that the maximum permissible concentration of 0.5 mg L-1 surfactants as established by the resolution CONAMA nº. 357/2005 (Brazilian Ministry of Environment) in order to protect aquatic communities is adequate, considering the sensitivity of the native species C. silvestrii. The results of the acute toxicity tests with DSS indicated a CE(I)50;48h value of 12.82; 4.37 and 5.42 mg L-1, for D. similis, C. dubia and C. silvestrii, respectively. A CENO value of 2.0 mg L-1 was obtained in the chronic toxicity tests for C. silvestrii. The surfactant LAS was detected in all the water samples collected in the Lobo (Broa), Lagoa Dourada and Fazzari reservoirs, but at concentrations lower than 5 mg L-1 (the method limit of detection). The toxicity tests with environmental samples revealed that there is no toxicity in the water of the Lobo and Lagoa Dourada sampled, however the water of Monjolinho Reservoir was toxic to D. similis and Fazzari stream was toxic to D. similis and C. dubia. Only the sediment of Monjolinho Reservoir was not toxic to cladocerans.
Os principais surfactantes aniônicos disponíveis no mercado mundial são o dodecil benzeno sulfonato de sódio (LAS) e o dodecil sulfato de sódio (DSS), utilizados principalmente em produtos de limpeza doméstica e de higiene pessoal. Devido ao grande consumo mundial de LAS e de DSS há uma crescente preocupação sobre os efeitos adversos destes compostos no ambiente e aos organismos. Este trabalho teve por objetivo avaliar a toxicidade aguda e crônica do LAS e do DSS aos organismos-teste Daphnia similis, Ceriodaphnia dubia e Ceriodaphnia silvestrii. Foi também avaliada a toxicidade da água e dos sedimentos em quatro reservatórios e um riacho do estado de São Paulo por meio de testes de toxicidade aguda e da análise quantitativa do surfactante LAS. Os testes de toxicidade aguda indicaram uma CE(I)50;48h do LAS de 14,17 mg L-1 para D. similis, 11,84 mg L-1 para C. dubia e 13,51 mg L-1 para C. silvestrii. Nos testes crônicos realizados foi observada significativa alteração viabilidade da progênie de C. dubia e C. silvestrii exposta ao LAS, com valores de CENO igual a 1,0 mg L-1 para C. dubia e 2,5 mg L-1 para C. silvestrii. Pode-se concluir que o valor máximo permissível de surfactantes de 0,5 mg L-1, estabelecido pela Resolução CONAMA nº. 357/2005 em águas destinadas à proteção das comunidades aquáticas, é adequado para a espécie nativa C. silvestrii. Nos testes de toxicidade aguda de DSS foram obtidos valores de CE(I)50;48h de 12,82; 4,37 e 5,42 mg L-1, para D. similis, C. dubia e C. silvestrii, respectivamente. No ensaio de toxicidade crônica obteve-se valor de CENO igual a 2,0 mg L-1 para C. silvestrii. O surfactante LAS foi detectado nas amostras de água dos Reservatórios do Lobo (Broa), Lagoa Dourada e Represa do Monjolinho em concentração inferior a 5 mg L-1. Os testes revelaram que não há toxicidade aguda aos cladóceros da água da Lagoa Dourada e do Reservatório do Lobo, havendo, contudo, toxicidade da água da Represa do Monjolinho para D. similis e da água do Córrego do Fazzari para os cladóceros D. similis e C. dubia. Somente a amostra de sedimento da Represa do Monjolinho não causou toxicidade aos cladóceros.

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Zhou, Jian Sheng. "Correlation entre tension interfaciale et composition de la couche adsorbee de systemes diphasiques capable de donner des microemulsions : influence de l'alcool comme cotensioactif." Paris 6, 1987. http://www.theses.fr/1987PA066674.

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La composition de la couche adsorbee a l'interface de systemes diphasiques : eau+nacl; dodecane, dodecylsulfate de sodium ou dodecylbenzenesulfonate comme agent de surface et butanol, pentanol ou alcool benzylique comme coagent de surface, est determinee par application de la loi de gibbs

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Popi, Maria da Graça Carraro Busica. "Avaliação da efetividade de arranjos processuais na melhoria do desempenho ambiental da produção de álcool laurílico etoxilado sulfatado." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-15072016-154524/.

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Tensoativo aniônico com amplo espectro de utilização, o álcool laurílico etoxilado sulfatado (SLES) é um dos álcoois graxos mais consumidos nos segmentos de cosméticos e detergentes. Da forma como esse processamento ocorre no Brasil, a cadeia de produção compreende transformações nos segmentos agrícola e industrial, cujos consumos de recursos e geração de rejeitos podem proporcionar impactos ambientais significantes, que devem ser conhecidos e dimensionados. Este estudo realizou uma avaliação do desempenho ambiental da produção de SLES para o arranjo tecnológico médio praticado no país, utilizando, para tanto, a metodologia de Avaliação de Ciclo de Vida (ACV). Os resultados obtidos mostraram que os estágios responsáveis por impactos ambientais mais significativos são: (i) processamento de álcool laurílico a partir de óleo de palmiste produzido na Ásia; (ii) geração de energia térmica a partir de queima de combustíveis fósseis para uso em operações diversas nos processos industriais; e (iii) a produção de óxido de etileno a partir de ativos petroquímicos. A partir desta avaliação foram então concebidas e modeladas alternativas de processo cuja introdução na cadeia de produção resultaria, ao menos em tese, em melhoria do desempenho ambiental global do processamento de SLES. Cada solução foi então organizada dentro de um cenário específico; são eles: Cenário I: obtenção de SLES a partir de óleo de palmiste produzido no Brasil; Cenário II: produção de SLES a partir de álcool laurílico sintético; Cenário III: geração de energia térmica para os estágios industriais de processo a partir de queima de biomassa; e Cenário IV: produção de SLES tendo como ativo de formulação óxido de etileno derivado de cana-de-açúcar. A técnica de ACV foi, mais uma vez aplicada à situação com vistas a examinar os efeitos, em âmbito sistêmico, proporcionados pelas modificações. O estudo conclui que a substituição do óleo de palmiste importado da Ásia por equivalente produzido no Brasil ou mesmo, por forma alternativa derivada de fonte sintética traria melhorias no desempenho ambiental em praticamente todas as categorias de impacto analisadas. Já a alternativa de uso de biomassa para produção de energia térmica apresenta melhores desempenhos em termos de Mudanças Climáticas e Depleção de Recursos Fósseis, mas resultam em efeitos negativos em termos de Ocupação do Solo, Eutrofização e Ecotoxicidade em comparação à situação original. Por fim, a incorporação de óxido de etileno de origem renovável ao processo não se reverteu em vantagens expressivas para o desempenho ambiental global do processo em nenhuma das categorias de impacto avaliadas. Uma análise ampla efetuada em termos de Balanço de CO2 para os cinco cenários avaliados demonstrou que a incorporação de ativos de fonte renovável resulta em alteração do perfil de impactos quanto à categoria de Mudanças Climáticas entre os cenários com relação às estimativas originais. Isso se deve essencialmente à incorporação ao balanço de parcelas referentes à fixação de CO2 do ar via fotossíntese e emissões de CO2 biogênico ocorridas durante o estágio agrícola, que passaram a ser consideradas por conta desta análise.
Sodium lauryl ether sulfate (SLES), a multi-purpose anionic surfactant, is one of the most used fatty alcohols for cleaning and personal care products. The chain of production in Brazil involves transformations in the agricultural and industrial sectors, tapping resources and generating waste, and can lead to significant environmental impact yet to be known and quantified. The present study assessed the environmental performance of the production of SLES for the average technological disposition in Brazil, using the methodology of Life Cycle Assessment (LCA). Results show that the stages responsible for the most significant environmental impact are: (i) processing of lauryl alcohol from palm kernel oil produced in Asia; (ii) generation of thermal energy from burning fossil fuel in various operations of the industrial process; and (iii) production of ethylene oxide from petrochemical sources. From this assessment, we designed alternative processes that if introduced in the chain of production, would in theory result in better global environmental performance of SLES processing. Each solution was then organized within specific scenarios, namely: Scenario I: obtainment of SLES from palm kernel oil produced in Brazil; Scenario II: production of SLES from synthetic lauryl alcohol; Scenario III: generation of thermal energy for the industrial stages of processing from burning biomass; and Scenario IV: production of SLES from ethylene oxide derived from sugarcane. LCA modeling was applied to examine the systemic effects made by these modifications. The study concludes that environmental performance improvements in virtually all impact categories analyzed could be achieved by replacing palm kernel oil imported from Asia by an equivalent produced in Brazil, or even by an alternative form derived from a synthetic source. The use of biomass for thermal energy, on the other hand, has better performance in terms of Climate Change and Fossil Depletion, but negative effects in terms of Agricultural Land Occupation, Eutrophication, and Ecotoxicity when compared to the original scenario. Finally, the incorporation of renewable origin ethylene oxide did not lead to expressive advantages for global environmental performance in any of the categories. A wide analysis of CO2 Balance for the five analyzed scenarios showed that the incorporation of renewable sources would result in improvements in Climatic Change when compared to the original estimations. This is due, essentially, to the incorporation of the balance of percentages of air CO2 fixation through photosynthesis and biogenic CO2 emissions that occur during the agricultural stage, which are taken into account in this analysis.

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Massey, Karen A., Anna M. Snelling, and Anna Nicolaou. "Quantitative analysis of surfactant deposits on human skin by liquid chromatography electrospray ionisation tandem mass spectrometry." Wiley, 2010. http://hdl.handle.net/10454/4574.

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Surfactants are commonly used as cleansing agents and yet there are concerns they may also have a role in skin irritation. Presently, the lack of suitable methods for quantitative and qualitative analysis of surfactant deposition on skin has hindered the in-depth investigation of such effects. Here, we report the application of reverse phase liquid chromatography electrospray ionisation mass spectrometry (LC/ESI-MS/MS) assays for two surfactants commonly used in consumer products, namely sodium lauryl ether sulphate (SLES) and laurylamidopropyl betaine (LAPB), to a baseline study aiming to assess deposition levels on human skin. The linearity of the assays was established at 3-20 ng, with coefficient of variation below 5%. Detection limits were 100 pg for LAPB and 1 ng for SLES; quantitation limits were 500 pg for LAPB and 2.5 ng for SLES. The baseline study was conducted using a panel of 40 healthy volunteers. Skin extract samples were taken in triplicate from forearms, using ethanol. SLES was detected on most volunteers, with 75% of them having SLES deposits in the range of 100-600 ng/cm2. LAPB was detected on the skin of all volunteers with 85% of them having deposit levels within the concentration range of 1-100 ng/cm2. These results demonstrate the extent to which commonly used surfactants remain on the skin during the day. The analytical methods reported here can be applied to the investigation of surfactants in relation to general skin condition and the development and optimisation of new consumer wash products.
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Yaacoubi, Abdelrani. "Etude de l'influence d'ions metalliques et de composes organiques sur l'adsorption du dodecyl sulfate de sodium sur charbon actif." Poitiers, 1988. http://www.theses.fr/1988POIT2286.

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Les resultats experimentaux (cinetique rapide d'adsorption, parametre d'equilibre des isothermes d'adsorption et variation du potentiel zeta des particules de charbon) montrent une augmentation de la capacite d'adsorption du dodecylsulfate de sodium en presence d'ions metalliques et une inhibition mutuelle de l'adsorption en presence d'alcools aliphatiques et de composes organiques

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Molle, Boris. "Etude des propriétés dynamiques de structures cellulaires formées dans un système eau/huile/surfactant/alcool." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10249.

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Dans cette these sont etudiees les proprietes dynamiques d'un systeme eau/toluene/sds/butanol qui forme spontanement des structures de type cellulaire a l'echelle nanoscopique, ou l'huile est confinee dans des cellules polyedriques separees par un film d'eau. A temperature ambiante le systeme est liquide et l'arrangement des cellules est macroscopiquement desordonne. Lorsque la temperature augmente le systeme devient viscoelastique et forme des structures cellulaires cristallines cubiques. La combinaison de differentes techniques experimentales a permis d'explorer la dynamique a differentes echelles d'espace (1 nm a 1 m) et de temps (1 ns a 100 s). Il en resulte une image complete de la dynamique dans ces structures cellulaires. La spectroscopie par echo de spin neutron (nse) a permis de sonder ces systemes a l'echelle locale de la cellule. Elle met en evidence que les cellules sont soumises a des fluctuations de forme. L'analyse des donnees fait de plus apparaitre un processus diffusif qui est attribue a des fluctuations de position des cellules dans la cage formee par leurs voisines. Une augmentation significative de la dynamique des fluctuations des cellules est observee lorsque le reseau cellulaire s'ordonne. Ce comportement nous a permis de preciser le role de ces fluctuations dans la stabilite de ces structures. L'etude par diffusion dynamique de la lumiere (dls) fait apparaitre deux modes diffusifs bien distincts. Le mode rapide correspond a un processus de compression-dilatation du reseau cellulaire. Ce processus a pour origine la nature dynamique de la structure a l'echelle de la cellule (mise en evidence par nse). Le coefficient de diffusion du mode lent et celui du sds mesure par diffusion rmn decrivent un meme processus diffusif qui correspond a une diffusion macroscopique des cellules. L'existence de ce processus diffusif dans le domaine cubique permet de rendre compte des proprietes viscoelastiques des structures cellulaires cubiques.

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Boumezioud, Mohamed. "Complexion de métaux de transition par des hydroxyquinolines en milieux homogènes et microhétérogènes : Influence de l'hydrophobie du ligand sur la cinétique réactionnelle dans des phases microémulsions." Nancy 1, 1987. http://www.theses.fr/1987NAN10276.

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Étude de la complexation de métaux de transition (nickel, cobalt) par des ligands bidentes du type hydroxy-8 quinoline dans des milieux homogènes (eau et méthanol) et des milieux microhétérogènes (solution micellaire, microémulsion), tant du point de vue thermodynamique que cinétique

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Abiyaala, Mohamed. "Etude en microscopie électronique par cryofracture des phases lyotropes du système SDS-Formamide." Rouen, 1993. http://www.theses.fr/1993ROUES048.

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Après une bibliographie concernant la structure des phases lyotropes et leurs défauts ainsi qu'une description des techniques cryogéniques utilisées en microscopie électronique, les résultats concernant les phases H, Q et L du système SDS-Formamide observées en cryofracture sont présentés. En plus des phases H, Q et L détectées en diffraction des rayons X, apparaît une structure à cylindres flexibles caractérisée par des défauts (dislocations, disinclinaisons, domaines focaux, joints de flexions et de torsions). Nous pensons que ces défauts sont une étape vers la transition HQ. Le modèle de structure de la phase à cylindres flexibles que nous proposons est discuté et comparé aux modèles proposés par d'autres auteurs. La nature de la fracture et les transitions de phases sont également discutées

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Book chapters on the topic "Sulfate(lauryl)"

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Bährle-Rapp, Marina. "TEA-Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 547. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_10384.

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Bährle-Rapp, Marina. "Ammonium Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 32. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_546.

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Bährle-Rapp, Marina. "Potassium Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 444. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_8321.

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Bährle-Rapp, Marina. "Sodium Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 513. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_9607.

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Bährle-Rapp, Marina. "MEA-Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 343. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6369.

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Bährle-Rapp, Marina. "MIPA-Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 357. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6635.

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Bährle-Rapp, Marina. "Magnesium Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 335. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6209.

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Bährle-Rapp, Marina. "TIPA-Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 559. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_10563.

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Bährle-Rapp, Marina. "DEA-Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 142. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_2660.

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Bährle-Rapp, Marina. "Mixed Isopropanolamines Lauryl Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 358. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_6652.

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Conference papers on the topic "Sulfate(lauryl)"

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Mawarani, Lizda Johar, Hendrix Abdul Ajiz, Widiyastuti Widiyastuti, and Heru Setyawan. "Effect of nanosilica on foam stabilities of sodium lauryl sulfate and polysorbate mixture." In 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0003006.

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Jarupanavet, Pornpimon, and Kowit Piyamongkala. "Chitosan modified with sodium lauryl ether sulfate used as adsorbent of soluble oil." In THE 7TH INTERNATIONAL CONFERENCE ON ENGINEERING, APPLIED SCIENCES AND TECHNOLOGY: (ICEAST2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0064061.

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Arnelli, Laila N. Mastuti, Aulia D. Arini, and Yayuk Astuti. "Activation of carbon from rice husk using chemical activating agents and physical treatments as sodium lauryl sulfate adsorbent." In THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0008302.

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Penkina, Yu A., and D. S. Masterenko. "Binary mixtures of nonionic gemini-surfactants surfynol® 400 series with sodium lauryl sulfate. Wetting of the low-energy surface." In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN MECHANICAL AND MATERIALS ENGINEERING: ICRTMME 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0018256.

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Penkina, Yu A., I. M. Zolnikov, and A. A. Perminova. "Interactions in binary mixtures of nonionic gemini-surfactants surfynol® 400 series with sodium lauryl sulfate. Micellization in the aqueous medium." In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN MECHANICAL AND MATERIALS ENGINEERING: ICRTMME 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0018255.

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Bahl, Manish, Juntao Zhang, and Raj M. Manglik. "Measurement of Dynamic and Equilibrium Surface Tension of Surfactant Solutions by the Maximum Bubble Pressure Method." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47137.

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Surfactant solution systems are encountered in many different applications, including as a method to enhance the nucleate boiling performance of water. Characterizing the attendant interfacial phenomena requires precise predictions of their surface tension relaxation behavior. In this study, both the dynamic and equilibrium surface tension behavior of aqueous surfactant solutions has been investigated using the maximum bubble pressure method. The surface tension is measured as a function of concentration at room (23°C) and elevated (80°C) temperatures. The critical micelle concentration (c.m.c.) of each surfactant is calculated from their respective equilibrium adsorption isotherms. The dynamic surface tension measurements are obtained at a surface age of 50 ms, which simulates conditions typically encountered during nucleate boiling of water. Two anionic surfactants, Sodium Dodecyl Sulfate (SDS) and Sodium Lauryl Ether Sulfate (SLES), two cationic surfactants Dodecyl Trimethyl Ammonium Chloride (DTAC) and Ethoquad O12/PG, and one non-ionic surfactant Triton X-100 have been used. SLES, Ethoquad O12/PG and Triton X-100 have, respectively, 3, 2, and 9–10 degrees of ethoxylation, which tends to alter the interfacial rheology. The σ–C isotherms show marked variation based on the surfactant ionic nature and the number of ethoxy groups present, along with the effects of temperature, with considerably less surface relaxation under dynamic conditions compared to those at equilibrium.

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Dikici, Birce, and Basim Q. A. Al-Sukaini. "Comparisons of Aqueous Surfactant Solutions for Nucleate Pool Boiling." In ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/power2016-59351.

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In this study, nucleate pool boiling of surfactant solutions are investigated. The surfactants chosen for the study are an ionic sodium lauryl sulfate (SLS), nonionic ECOSURF™ EH-14, and nonionic ECOSURF™ SA-9. It is observed that adding a small amount of surfactant alters the water boiling phenomenon considerably. Boiling curves for different concentrations are shifted to the left. The wall temperature dropped with an increase in the concentration of aqueous surfactant solutions. Also, it is found that the boiling heat transfer enhancement of SLS is higher than that of EH-14 and SA-9 compared to water. Boiling heat transfer coefficient (h) enhancements compared to water are 46%, 30%, and 21%. (for SLS, for EH-14 and for SA-9 respectively) Boiling visualization shows that boiling with surfactant solutions compared with that in pure water is more vigorous. Bubbles are smaller, activate continuously, and collapse quickly. Also, the bubble departure frequency is observed to be higher than that of pure water. Results prove that there is an important possibility to enhance the boiling application processes by environmentally friendly EH-14, and SA-9 additives. Experimentation can be extended for searching other surfactants in order to find their most efficient quantity in water for boiling heat transfer.

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Dikici, Birce, Edidiong Eno, and Marc Compere. "Nucleate Pool Boiling Enhancement Experiments for Heat Transfer Laboratory." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63860.

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Boiling heat transfer is used in variety of industrial processes and applications, such as refrigeration, vapor cycle power generation, heat exchangers, petroleum refining, and chemical manufacturing. It is also used in cooling of high power electronic components, nuclear reactor cooling and seawater desalination. Enhancements in boiling heat transfer processes are critical for making these applications more energy efficient. The aim of this paper is to demonstrate the water pool boiling phenomena under the influence of surfactant additives. The test setup has multiple benefits. First, the test setup enhances teaching in Heat Transfer, Transport Phenomena, Fluid Mechanics, and Renewable Energy through in class demonstrations and student experiments. Second, the test setup provides a platform for research in boiling enhancement. This apparatus will be used in the classroom for hands-on experiments and also as a diagnostic tool for boiling performance improvement methods like surfactant effects. For determining surfactant effects, different concentrations of sodium lauryl sulfate (SLS) added to pure water were tested and enhancement through surfactant is quantified. With the integration of boiling experiments into coursework, mechanical engineering students will develop laboratory experiences to enhance the learning of basic boiling concepts. Three pool boiling projects that can be integrated into heat transfer laboratory are explained. The suggested test setup is a valuable tool for improving teaching effectiveness in both classroom and laboratory of heat transfer related classes.

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Mane, Nikhil S., and Vadiraj Hemadri. "Effect of Surfactants and Nanoparticle Materials on the Stability and Properties of CuO-Water and Fe3O4-Water Nanofluids." In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-9034.

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Abstract The arguments in favor of using nanofluids in thermal applications have been increasing substantially for the last few decades. Nanofluids provide improved performance in heat transfer processes in comparison to their base fluids as a result of their superior thermal properties. Even though nanofluids exhibit better thermal properties, their usage has been limited due to their stability issues. The stability of the nanofluid greatly affects its thermal properties over a period of time. The stability and thermal properties of nanofluids can be affected by parameters like surfactants used and their concentrations, and also on the nanomaterial used in the nanofluid. In this study, surfactant material and nanoparticle material are selected as process variables and for each variable two levels are selected. For surfactant material, Sodium Lauryl Sulfate (SLS) and Cetyl Trimethyl Ammonium Bromide (CTAB) are selected. Surfactant concentration ratios are taken as 1:2 for CuO and 1:4 for Fe3O4 material. Four nanofluid samples are prepared with 0.1% weight of nanoparticles and their stability and properties are studied. The feasibility of turbidity as an indicator for stability is also explored in this work. The results show that the zeta potential and hydrodynamic characteristics are largely dependent on the surfactant material. Both surfactants show good stability of nanofluids. In-line with earlier observations, it is also observed that the nanoparticle material has a dominant effect on the thermal conductivity of the nanofluids. Comparing the turbidity of the nanofluids to the zeta potential, it is observed that the turbidity measurement gives first-hand information about the stability of nanofluids and can act as an index for stability. But still, more exploration is necessary for this field so a quantitive relation can be established between turbidity and zeta potential of different nanofluid materials and concentrations.

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Dikici, Birce, and Matthew J. Lehman. "Study of Surface Tension and Natural Evaporation of Aqueous Surfactant Solutions." In ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/power2018-7281.

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Surface tension and solution evaporation of aqueous solutions of sodium lauryl sulfate (SLS), ECOSURF™ EH-14, and ECOSURF™ SA-9 under natural convection is examined through experimental methods. SLS is an anionic surfactant while EH-14 and SA-9 are environmentally-friendly nonionic surfactants. Surfactants are known to affect evaporation performance of solutions and are studied in relation to water loss prevention and heat dissipation. Surfactants could be useful under drought conditions which present challenges to water management on a yearly basis in arid areas of the world. Recent water scarcity in the greater Los Angeles area, south eastern Africa nations, eastern Australia and eastern Mediterranean countries has high cost of water loss by evaporation. Surfactants are studied as a potential method of suppressing evaporation in water reservoirs. Surfactants are also studied as performance enhancers for the working fluid of heat dissipation devices, such as pulsating heat pipes used for electronics cooling. Some surfactants have been shown to lower thermal resistances and friction pressure in such devices and thereby increase their efficiency. The static surface tensions of the aqueous-surfactant solutions are measured with surface tensiometer using Wilhelmy plate method. The surfactants are shown to lower surface tension significantly from pure water. The surface tension values found at the Critical Micelle Concentration are 33.8 mN/m for SLS, 30.3 mN/m for EH-14, and 30.0 mN/m for SA-9. All three surfactants reduced natural convection water loss over 5 days with SLS showing the greatest effect on evaporation rates. The maximum evaporation reduction by each surfactant from distilled water with no surfactants after 5 days is 26.1% for SLS, 20.8% for EH-14, and 18.4% for SA-9.

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