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Thematische Bibliographien / 12-Hydroxystearic acid

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Auswahl der wissenschaftlichen Literatur zum Thema „12-Hydroxystearic acid“

Autor: Grafiati

Veröffentlicht am 8. Februar 2025

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Zeitschriftenartikel zum Thema "12-Hydroxystearic acid"

1

Kuwahara, Tetsuro, Hiromasa Nagase, Tomohiro Endo, Haruhisa Ueda und Masayuki Nakagaki. „Crystal Structure of DL-12-Hydroxystearic Acid“. Chemistry Letters 25, Nr. 6 (Juni 1996): 435–36. http://dx.doi.org/10.1246/cl.1996.435.

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2

Lan, Yaqi, und Michael A. Rogers. „12-Hydroxystearic acid SAFiNs in aliphatic diols – a molecular oddity“. CrystEngComm 17, Nr. 42 (2015): 8031–38. http://dx.doi.org/10.1039/c5ce00652j.

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3

Dari, Carolina, Fabrice Cousin, Clemence Le Coeur, Thomas Dubois, Thierry Benezech, Arnaud Saint-Jalmes und Anne-Laure Fameau. „Ultrastable and Responsive Foams Based on 10-Hydroxystearic Acid Soap for Spore Decontamination“. Molecules 28, Nr. 11 (24.05.2023): 4295. http://dx.doi.org/10.3390/molecules28114295.

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Currently, there is renewed interest in using fatty acid soaps as surfactants. Hydroxylated fatty acids are specific fatty acids with a hydroxyl group in the alkyl chain, giving rise to chirality and specific surfactant properties. The most famous hydroxylated fatty acid is 12-hydroxystearic acid (12-HSA), which is widely used in industry and comes from castor oil. A very similar and new hydroxylated fatty acid, 10-hydroxystearic acid (10-HSA), can be easily obtained from oleic acid by using microorganisms. Here, we studied for the first time the self-assembly and foaming properties of R-10-HSA soap in an aqueous solution. A multiscale approach was used by combining microscopy techniques, small-angle neutron scattering, wide-angle X-ray scattering, rheology experiments, and surface tension measurements as a function of temperature. The behavior of R-10-HSA was systematically compared with that of 12-HSA soap. Although multilamellar micron-sized tubes were observed for both R-10-HSA and 12-HSA, the structure of the self-assemblies at the nanoscale was different, which is probably due to the fact that the 12-HSA solutions were racemic mixtures, while the 10-HSA solutions were obtained from a pure R enantiomer. We also demonstrated that stable foams based on R-10-HSA soap can be used for cleaning applications, by studying spore removal on model surfaces in static conditions via foam imbibition.

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Fameau, Anne-Laure, Brnice Houinsou-Houssou, Bruno Novales, Laurence Navailles, Frdric Nallet und Jean-Paul Douliez. „12-Hydroxystearic acid lipid tubes under various experimental conditions“. Journal of Colloid and Interface Science 341, Nr. 1 (Januar 2010): 38–47. http://dx.doi.org/10.1016/j.jcis.2009.09.034.

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5

Kokotou, Maroula G., Christiana Mantzourani, Asimina Bourboula, Olga G. Mountanea und George Kokotos. „A Liquid Chromatography-High Resolution Mass Spectrometry (LC-HRMS) Method for the Determination of Free Hydroxy Fatty Acids in Cow and Goat Milk“. Molecules 25, Nr. 17 (29.08.2020): 3947. http://dx.doi.org/10.3390/molecules25173947.

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A liquid chromatography–high resolution mass spectrometry (LC-HRMS) method for the direct determination of various saturated hydroxy fatty acids (HFAs) in milk was developed for the first time. The method involves mild sample preparation conditions, avoids time-consuming derivatization procedures, and permits the simultaneous determination of 19 free HFAs in a single 10-min run. This method was validated and applied in 17 cow milk and 12 goat milk samples. This work revealed the existence of various previously unrecognized hydroxylated positional isomers of palmitic acid and stearic acid in both cow and goat milk, expanding our knowledge on the lipidome of milk. The most abundant free HFAs in cow milk were proven to be 7-hydroxystearic acid (7HSA) and 10-hydroxystearic acid (10HSA) (mean content values of 175.1 ± 3.4 µg/mL and 72.4 ± 6.1 µg/mL in fresh milk, respectively). The contents of 7HSA in cow milk seem to be substantially higher than those in goat milk.

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Tamura, T., und M. Ichikawa. „Effect of lecithin on organogel formation of 12-hydroxystearic acid“. Journal of the American Oil Chemists' Society 74, Nr. 5 (Mai 1997): 491–95. http://dx.doi.org/10.1007/s11746-997-0170-5.

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7

Takeno, Hiroyuki, Noriaki Kikuchi, Shingo Kondo und Toshiaki Dobashi. „Rheological and structural studies on gelation of 12-Hydroxystearic Acid Solution“. Transactions of the Materials Research Society of Japan 32, Nr. 3 (2007): 835–38. http://dx.doi.org/10.14723/tmrsj.32.835.

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8

Uehara, M., Y. Maki und T. Dobashi. „Preparation of 12-hydroxystearic acid microsphere containing oil-based contrast medium“. Transactions of the Materials Research Society of Japan 36, Nr. 3 (2011): 379–82. http://dx.doi.org/10.14723/tmrsj.36.379.

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9

Novoded, R. D., M. E. Krasnokutskaya, A. E. Mysak und S. M. Kisterskaya. „Phase transitions of calcium and lithium soaps of 12-hydroxystearic acid“. Chemistry and Technology of Fuels and Oils 21, Nr. 5 (Mai 1985): 260–62. http://dx.doi.org/10.1007/bf00724256.

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10

Şahan, Nurten, und Halime Paksoy. „Developing microencapsulated 12-hydroxystearic acid (HSA) for phase change material use“. International Journal of Energy Research 42, Nr. 10 (01.05.2018): 3351–60. http://dx.doi.org/10.1002/er.4090.

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Dissertationen zum Thema "12-Hydroxystearic acid"

1

Lipowski, Brian M. „Phase Behavior of 12-Hydroxystearic Acid Gels“. University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1417628844.

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2

Windorf, Martin [Verfasser]. „12-Hydroxystearic acid-based in situ forming organogels : development and characterization / Martin Windorf“. Halle, 2017. http://d-nb.info/1141177978/34.

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3

Duret, Bérénice. „Mise au point de dispersiοns aqueuses de particules d’huiles gélifiées et applications à la prοtectiοn de la peau“. Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMLH39.

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Cette thèse vise à développer des formules cosmétiques éco-responsables à faible nombre d’ingrédients, en lien avec le contexte actuel du « Clean-label » dans ce secteur. Nous nous sommes intéressés à des dispersions de particules d’huile gélifiée, nommées « dispersions de gélosomes », encore inexplorées pour une utilisation cosmétique. Connues pour être stables et capables d’encapsuler des actifs hydrophobe, la question de leur texture et de leur application sur la surface de la peau reste aujourd’hui non renseignée. Elles sont préparées par émulsification à chaud d’un organogel, composé d’huile et de gélifiant lipophile (acide 12-hydroxystéarique), en présence d’un agent stabilisant (alcool polyvinylique hydrolysé à 80%). L’émulsion formée conduit, après refroidissement, à une dispersion de particules d’organogel. Nous avons d’abord démontré la possibilité de réaliser des dispersions de gélosomes avec des huiles cosmétiques et un conservateur. Des textures très variées ont été obtenues allant de liquides fluides à des gels fermes et cassants. L’analyse physico-chimique et l’observation microscopique de ces nouvelles formules ont permis d’identifier leurs microstructures : dans certaines conditions, des connexions se forment entre les gélosomes, et un hydrogel colloïdal est obtenu. L’étude des interactions à l’interface a permis de déterminer les facteurs et les mécanismes menant à des gélosomes individualisés ou connectés. Les dispersions de gélosomes, même les plus fluides, ont montré une grande stabilité. Enfin, de nouvelles dispersions de gélosomes ont pu être formulées à partir de stabilisants de nature et de modes de stabilisation variés. La méthodologie employée au cours de ce travail a permis d’établir un lien entre le stabilisant et les propriétés des dispersions. Des mécanismes différents ont pu être identifiés, induisant des microstructures et des propriétés applicatives intéressantes et variées. Pour la première fois, les propriétés de texture des dispersions, caractéristiques d’une application topique ont été collectées sur l’ensemble des systèmes par une approche combinée d’analyses rhéologiques in vitro et d’analyses sensorielles in vivo ; les perceptions ont été décrites et explicitées en fonction de l’influence de la nature de l’huile, du stabilisant et du type de microstructure
This thesis aims to develop eco-responsible cosmetic formulas with a low number of ingredients, in line with the current context of “Clean-label” in this sector. We focused on dispersions of gelled oil particles, called “gelosome dispersions”, which have not yet been explored for cosmetic use. Known to be stable and capable of encapsulating hydrophobic active ingredients, the question of their texture and their application onto the surface of the skin remains unanswered to date. They are prepared by hot emulsification of an organogel, composed of oil and a lipophilic gelator (12-hydroxystearic acid), in the presence of a stabilizing agent (80% hydrolyzed polyvinyl alcohol). Upon cooling, the emulsion leads to a dispersion of organogel particles. We first demonstrated the possibility of making gelosome dispersions with cosmetic oils and a preservative. A wide variety of textures was obtained, ranging from fluid liquids to firm and brittle gels. Physicochemical analysis and microscopic observation of these new formulas made it possible to identify their microstructures: under certain conditions, connections are formed between the gelosomes, and a colloidal hydrogel is obtained. The factors and mechanisms leading to individualized or connected gelosomes were determined by the study of interactions at the interface. Gelosome dispersions, even the most fluid, showed great stability. Finally, new dispersions of gelosomes were formulated using stabilizers of various types and stabilization modes. The methodology used during this work enabled the establishment of a link between the stabilizer and the properties of the dispersions. Different mechanisms could be identified, inducing interesting and varied microstructures and application properties. For the first time, the texture properties of the dispersions, characteristic of a topical application, were collected across all systems using a combined approach of in vitro rheological analyzes and in vivo sensory analyses; the perceptions were described and explained according to the influence of the nature of the oil, the stabilizer and the type of microstructure

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Jou-TingChiang und 江柔婷. „Studies of Multi-stable, Large Phase-retardation Plate Using 12-Hydroxystearic Acid (HSA) Doped Liquid Crystals“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/32030044050003058789.

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碩士
國立成功大學
物理學系碩博士班
98
Phase retarders have been commonly employed in optical systems. Liquid crystal-based phase retarders attract much attention, because they offer several advantages, such as low cost, light weight, low power consumption and no mechanical moving part. But, majority of liquid crystal-based phase modulators still need an operating voltage ~35 V. This thesis demonstrates a multi-stable, large phase-retardation plate using 12-Hydroxystearic Acid (HSA) doped liquid crystals. The mechanism is that hydrogen-bond forces between HSA molecules make the HSA doped LC material to form a gel compound in room temperature. Therefore, various alignment directions of LCs can be stabilized to achieve the so-called multi-stable characteristics, which can be used to save power consumption. Experimental processes are: firstly, to control the temperature of sample to ~70 ℃, secondly, to apply a voltage to the sample, and then cool the sample from 70 ℃ to room temperature, finally, to turn off the applied voltage. After a specific process, a LC wave plate with designed phase retardations can be obtained by applying various voltage in the process. Experimentally, a maximum phase retardation 4π can be obtained presently. When voltages of 3.5 V and 7.1 V are applied in the process, a 1/2 and 1/4 wave plates are achieved, respectively. Therefore, the phase-retardation plate using HSA doped LCs possesses a large phase retardation, low operating voltage and multi-stable characteristics, and is potential for practicality application.

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Buchteile zum Thema "12-Hydroxystearic acid"

1

Toro-Vazquez, J. F., M. A. Charó-Alonso und F. M. Alvarez-Mitre. „CHAPTER 6. Gelation Properties of Gelator Molecules Derived from 12-Hydroxystearic Acid“. In Food Chemistry, Function and Analysis, 106–32. Cambridge: Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010184-00106.

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2

Mallia, V. Ajay, und Richard G. Weiss. „Structure-Property Comparison and Self-Assembly Studies of Molecular Gels Derived from (R)-12-Hydroxystearic Acid Derivatives as Low Molecular Mass Gelators“. In ACS Symposium Series, 227–43. Washington, DC: American Chemical Society, 2018. http://dx.doi.org/10.1021/bk-2018-1296.ch012.

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3

Takeno, Hiroyuki, Tomomitsu Mochizuki, Kazuto Yoshiba, Shingo Kondo und Toshiaki Dobashi. „Self-assembling Structures and Sol-Gel Transition of Optically Active and Racemic 12-Hydroxystearic Acids in Organic Solvents“. In Gels: Structures, Properties, and Functions, 47–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00865-8_7.

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4

Rogers, Michael A. „12-Hydroxystearic Acid Oleogels“. In Edible Oleogels, 85–102. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-814270-7.00004-6.

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5

Hughes, Naomi, James W. Rush und Alejandro G. Marangoni. „Feeding Study of 12-Hydroxystearic Acid Oleogels“. In Edible Oleogels, 381–99. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-814270-7.00016-2.

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6

Hughes, Naomi, James W. Rush und Alejandro G. Marangoni. „Clinical Study on 12-hydroxystearic Acid Organogel Ingestion“. In Edible Oleogels, 313–30. Elsevier, 2011. http://dx.doi.org/10.1016/b978-0-9830791-1-8.50017-6.

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Konferenzberichte zum Thema "12-Hydroxystearic acid"

1

Gullapalli, Pratap, Jyun-Syung Tsau und John P. Heller. „Gelling Behavior of 12-Hydroxystearic Acid in Organic Fluids and Dense CO₂“. In SPE International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, 1995. http://dx.doi.org/10.2118/28979-ms.

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