42 résultat(s) recherche sur le tag 'surfactants'

Interaction between lemna minor and anionic surfactants / C. A. Ojeda in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 1/2008 (01-02/2008)  

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 45, N° 1/2008 (01-02/2008) . - p. 17-20 Titre : Interaction between lemna minor and anionic surfactants Type de document : texte imprimé Auteurs : C. A. Ojeda, Auteur ; A. Fernàndez Cirelli ; A. R. Torchinsky ; M. J. L. Castro, Auteur Année de publication : 2008 Article en page(s) : p. 17-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Plantes aquatiques -- Effets de la pollution de l'eau Plantes aquatiques -- Effets des produits chimiques Surfactants Tags : Surfactants  anioniques  Macrophytes Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The aim of this study was to determine the interaction between anionic surfactants and macrophytes. Two different types of surfactants were chosen for the study: SDS (non-aromatic) and LAS (aromatic). Lemna minor was the macrophyte of choice, an aquatic plant, useful for its selective removal of ammonia, its ability to cover the surface of water bodies, and to remove heavy metals from effluents. The experiments with L. minor were performed in the presence and absence of nutrients. The concentrations of surfactants used were similar to those which can be found in wastewater. Under these experimental conditions L. minor was not affected. Because of this, L. minor used in treatment ponds appears not to be affected by the presence of surfactants. Moreover it can diminish their concentration in effluents prior to its disposal in water bodies. En ligne : https://drive.google.com/file/d/1AYDhRiKZa_DPigm4gHC0QL23jbWJk2FL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3051 [article]

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Krafft points and Cloud points of polyoxyethylated nonionic surfactants / H. Schott in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 1/1009 (01-02/2009)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 1/1009 (01-02/2009) . - p. 39-47 Titre : Krafft points and Cloud points of polyoxyethylated nonionic surfactants : part. 3. The effect of hydrotropes and other organic electrolytes Type de document : texte imprimé Auteurs : H. Schott, Auteur Année de publication : 2009 Article en page(s) : p. 39-47 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cations Electrolytes Polyéthylène glycol Surfactants Tags : Polyoxyethylated  nonionic  surfactants  Nonionic  Krafft  point  Effect  short  organic  electrolytes  Clouod  short-chain  of  hydrotropes  Cloud  Kfrafft  mixtures  cationic Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The effect of various organic electrolytes on the Krafft point (KP) of two and the cloud point (CP) of three polyoxyethylated nonionic surfactants is described. Additives that lower the KP or raise the CP salt the surfactants in. The short-chain organic electrolytes acetic acid and propionic acid lower the KP of polyoxyl 10 cetyl ether (C16E10) while sodium acetate, propionate and butyrate leave the KP largely unaffected. Sodium acetate and sodium propionate lower the CP of C16E10 substantially. Sodium butyrate raises the CP, presumably by rendering the C16E10 micelles partly ionic via mixed micelle formation. Hydrotropes (sodium benzoate, salicylate and xylene sulfonate, and the nonelectrolyte nicotinamide) lower the KP of polyoxyl 10 stearyl ether (C18E10) substantially at 3.0 m concentrations and raise the CP substantially even at 0.10 m concentrations. The KPs of mixtures of C18E10 (KP = 48°) and hexadecylamine hydrochloride (HDCl, KP = 44°) were measured at a constant total surfactant concentration of 2.0% based on the weight of water. The plot of KP versus the relative weight-percent HDCl is V-shaped with a eutectic minimum of 32° at 33% HDCl. The left branch is entirely linear. It shows how increasing weight-percentages of HDCl lower the KP of C18E10. The right branch is linear up to ca. 80% HDCl but becomes less steep at higher HDCl concentrations. It shows how decreasing weight-percentages of C18E10 raise the KP of HDCl. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3719 [article]

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A new class of labile surfactants that break down to non-surface active products upon heating or after a pre-set time, without the need for a pH change / M. Andersson in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 6/2007 (12/2007)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 6/2007 (12/2007) . - p. 366-372 Titre : A new class of labile surfactants that break down to non-surface active products upon heating or after a pre-set time, without the need for a pH change Type de document : texte imprimé Auteurs : M. Andersson, Auteur ; A. Hillerström, Auteur ; A. Svensk, Auteur ; S. R. Younesi, Auteur ; E. Sjöström, Auteur ; I. Blute, Auteur ; Mikael Kjellin, Auteur ; J. Kizilng, Auteur ; B. Kronberg, Auteur ; J. Oldgren, Auteur ; A. Hansson, Auteur ; S. Sjöstrand, Auteur Année de publication : 2008 Article en page(s) : p. 366-372 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : Labile  surfactants  Cleavable  Car  washing  degreasing  Alkyl  ketene  dimer  Beta-keto Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A new class of labile surfactants that break down at a controllable rate without the need for a change in pH will be presented. The invention has been patented by YKI Institute for Surface Chemistry, and is based on use of béta-keto acids or their salts as surface-active compounds. These surfactants spontaneously break down through decarboxylation, to form an oil-like ketone and CO2/HCO3–/CO32– depending on pH. The rate of breakdown can be controlled within a wide range by temperature or by certain additives, but, unlike most cleavable surfactants, a change in pH is not needed. Furthermore the surfactants can be conveniently activated from a stabile precursor just before use, and one (of many possible) precursors of this kind is already available on the industrial scale in the form of a well-known chemical that is FDA-approved in other, non-surfactant, applications. The compound in question, alkyl ketene dimer (AKD), is produced in large scale by a number of large chemical producers today, and used for hydrophobization of paper. The present article gives an overview of the surfactant chemistry, with focus on recent studies of the kinetics of activation of the surfactant precursor and breakdown kinetics of the labile surfactant at different conditions. Furthermore, possible industrial applications of the surfactant will be discussed, with one example taken from a recent feasibility Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3199 [article]

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On Plate Resolution and Identification of Three-Component Mixture of Nonionic Surfactants / A. Mohammad in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 2/2009 (02-03/2009)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 46, N° 2/2009 (02-03/2009) . - p. 81-84 Titre : On Plate Resolution and Identification of Three-Component Mixture of Nonionic Surfactants Type de document : texte imprimé Auteurs : A. Mohammad, Auteur ; S. A. Bhawani, Auteur Année de publication : 2009 Article en page(s) : p. 81-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chromatographie sur couches minces Surfactants Tags : Chromatographie  couches  minces  Surfactants  non-ioniques  Triton  X-100  Brij-57  Brij-78 Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Silica gel 60 F254 plates were used with mixed aqueous-organic solvent systems consisting of dioxan and lithium chloride for the chromatography of three nonionic surfactants. The resolution of coexisting Triton X-100, Brij-57 and Brij-78 was achieved with the solvent system 1,4-dioxan : 1% aqueous LiCl (40 : 60, v/v). The effect of concentration of Li+ ions in the solvent system on the mobility of the three surfactants was studied. The interference on the resolution of the mixture of Triton X-100, Brij-57 and Brij-78, due to the presence of metal cations as impurities, is also examined. The limits of detection of Triton X-100, Brij-57 and Brij-78 estimated were 0.075, 0.150 and 0.20 µg/zone respectively. The practical applicability of proposed method was tested for the identification of three coexisting nonionic surfactants after their separation from the spiked aqueous systems. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4575 [article]

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Study of the cloud point of C12EO6 and C12EO8 nonionic surfactants : effect of additives / Moussa Alibrahim in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 4 (07-08/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 4 (07-08/2012) . - p. 330-334 Titre : Study of the cloud point of C12EO6 and C12EO8 nonionic surfactants : effect of additives Type de document : texte imprimé Auteurs : Moussa Alibrahim, Auteur Année de publication : 2012 Article en page(s) : p. 330-334 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : C12E06  C12EO8  Additifs  Micelle  Surfactants  'Point  trouble' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Significant change in the cloud point of the nonionic surfactant solutions is observed by adding foreign substance. The aqueous solutions of these surfactants show complex phase behaviour including liquid-liquid separation at higher temperature. Electrolytes as well as nonelectrolytes have a large effect on the cloud point (CP) of C12EO6and C12EO8nonionic surfactants, because of their effect on water structure and their hydrophilicity. The presence of NaI and KI in the systems leads to a substantial increase in the cloud point of 2 wt% of the C12EO6and C12EO8solutions, but the increase is relatively less with KI than with NaI. Moreover, the cloud point decreases in the presence of NaF, NaCl and NaBr, and also similar identical observation was seen in the cloud point with KF, KCl and KBr, respectively. Furthermore, the results show that the addition of the tetramethyl ammonium bromide (TMABr) decreases the cloud point of the C12EO6and C12EO8, whereas the addition of tetrabutyl ammonium iodide (TBAI) increases the cloud point of the above systems. The clouding phenomenon of the aqueous C12EO6and C12EO8systems in the presence of various additives is discussed. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15553 [article]

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Synthesis and properties of di-n-hexadecyl-a,ω-alkyl bisphosphate surfactants / P. Tyagi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 4/2010 (07-08/2010)

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Thermo-responsive Metal-chelating Surfactants : Properties and Use in Cloud Point Extraction of Uranyl Nitrate / S. Prévost in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 2/2009 (02-03/2009)

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Adsorption and desorption of ionic surfactants / T. Pusic in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 3/2010 (24/05/2010)

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Adsorption of CTAB on Zeolite A Detected by Surfactant Ion-selective Electrode / Y.-Y. Luo in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 3/2009 (05-06/2009)

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Alkyl triphenylphosphonium bromide surfactant mediated reactions of p-nitrophenyl acetate / S. Moore in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 3/2007 (06-07/2007)

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Formation of multilamellar vesicles in the systems of decyltrimethylammonium hydroxides/2-hydroxy 1-carboxynaphthoate and octyltrimethylammonium hydroxides/2-hydroxy 1-carboxynaphthoate / R. Abdel-Rahem in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 3/2007 (06-07/2007)

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Kinetics and mechanism of nucleophilic xubstitution in SnR2Cl2 × 2DMSO by chloride ions in micellar microenvironment / Abdul Moheman in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 4 (07-08/2012)

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Micelles activated planar chromatographic separation of hydrophilic vitamins / A. Mohammad in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 5/2009 (09-10/2009)

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Micellization of alkyl trimethyl ammonium bromides in aqueous solutions – Part 1 : critical micelle concentration (CMC) and ionization degree / Jarmila Oremusovà in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 3 (04-05/2012)

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Ordered ferrocene-containing mesoporous materials with tailor-made pore size / T. Zhang in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 5/2010 (09-10/2010)

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Reversible performance of dodecyl tetramethyl guanidine solution induced by CO2 trigger / Y. Qin in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 5/2009 (09-10/2009)

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Synthesis of dodecyl lauroyl benzene sulfonate and its application in enhanced oil recovery / Zhen-Gang Cui in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 5 (09-10/2011)

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Development of cleavable surfactants / D. Shukla in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 1/2010 (01-02/2010)

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Diffusion and distribution of element-labelled surfactants in human hair / F.-J. Wortmann in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 26, N° 2 (04/2004)  

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Environmentally compatible surfactants for the cosmetic industry / H. Berger in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 19, N° 5 (10/1997)  

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Interaction of mixture of anionic surfactants with collagen / J. Krejci in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 29, N° 2 (04/2007)  

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Microencapsulation of rosmarinic acid using polycaprolactone and various surfactants / H.-J. Kim in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 32, N° 3 (06/2010)  

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Preparation and Performance Properties of a Series of Novel Anionic Gemini Surfactants / D. Shukla in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 2/2008 (03-04/2008)

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Synthesis and Properties Evaluation of Nonionic-Anionic Surfactants Suitable for Enhanced Oil Recovery Using Sea Water / O. Sha in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 2/2008 (03-04/2008)

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CESIO, un exemple de cross-fertilisation / Françoise Basset in PARFUMS COSMETIQUES ACTUALITES, N° 203 (10-11/2008)  

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Nanotechnology & coatings Q & A / Vinayak M. Natu in PAINTINDIA, Vol. LX, N° 2 (02/2010)

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Physico-chemical modifications of liposome structures through interaction with surfactantsy / I. Ribosa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 14, N° 3 (06/1992)  

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Biologically Active Tin Compounds Based on Aziridine and Azepane Derivatives / H. El-sharkawy Ali in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 2/2008 (03-04/2008)

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Phosphorylation of Mono- or Di-octadienyl-D-xylosides. Influence towards Surfactant Properties / S. Pradeau in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 6/2008 (11-12/2008)

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Synthesis of 3-dehydroabietylamino-2-hydroxypropyl trimethylammonium chloride and its antibacterial activity / C. Zhao-Sheng in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 1/2010 (01-02/2010)

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Adaptive response of the skin to UVB damage : role of the p53 protein / L. Verschooten in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 28, N° 1 (02/2006)  

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Change of amphiphilic association structures during evaporation from emulsions in surfactant–fragrance–water systems / Z. Zhang in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 22, N° 3 (06/2000)  

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Changement de fluorescence de la fluoresceine en présence de tensioactifs / A. K. Mathur in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 10, N° 5 (10/1988)  

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Durability of a drag reducing solution / V. Mik in APPLIED RHEOLOGY, Vol. 18, N° 1 (2008)

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Evaluation in vivo chez l'homme par deux méthodes non invasives de la fonction de barrière du stratum corneum après modifications physiques et chimiques / F. Kompaore in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 13, N° 6 (12/1991)  

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fEvaluation of the irritant capacity of decyl polyglucoside / J. M. Vozmediano in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 22, N° 1 (02/2000)  

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L'importance des lipides dans l'absorption d'eau par le stratum corneum / S. E. Friberg in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 12, N° 1 (02/1990)

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Phase diagram and emulsion stability of surfactant–fragrance systems / Z. Zhang in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 22, N° 2 (04/2000)  

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Rheological characterization of hair shampoo in the presence of dead sea salt / B. Abu-Jdayil in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 26, N° 1 (02/2004)  

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Sodium lauryl sulphate/amphoteric surfactant interactions : selective diffusion through a collagen film / X. Domingo in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 13, N° 5 (10/1991)  

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Test oculaire comparatif de tensioactifs lipopeptidiques / M. P. Vinardell in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 12, N° 1 (02/1990)

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The phase behaviour of polyoxyethylene 10 stearyl ether/geraniol/olive oil/H2O system and preliminary evaluation of fragrance evaporation / Jiang Yang in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 18, N° 2 (04/1996)  

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