Bibliografías temáticas / Double-chain Amphiphiles

Literatura académica sobre el tema "Double-chain Amphiphiles"

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Publicado: 18 de mayo de 2024

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Artículos de revistas sobre el tema "Double-chain Amphiphiles"

1

Brun, Alice y Guita Etemad-Moghadam. "New Double-Chain and Aromatic (α-Hydroxyalkyl)phosphorus Amphiphiles". Synthesis, n.º 10 (2002): 1385–90. http://dx.doi.org/10.1055/s-2002-33111.

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Kimizuka, Nobuo, Takahiro Takasaki y Toyoki Kunitake. "Polymorphism in Bilayer Membranes of Novel Double-Chain Ammonium Amphiphiles". Chemistry Letters 17, n.º 11 (5 de noviembre de 1988): 1911–14. http://dx.doi.org/10.1246/cl.1988.1911.

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Koulov, Atanas V., Lauri Vares, Mahim Jain y Bradley D. Smith. "Cationic triple-chain amphiphiles facilitate vesicle fusion compared to double-chain or single-chain analogues". Biochimica et Biophysica Acta (BBA) - Biomembranes 1564, n.º 2 (agosto de 2002): 459–65. http://dx.doi.org/10.1016/s0005-2736(02)00496-0.

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Cescato, Claudio, Peter Walde y Pier Luigi Luisi. "Supramolecular Transformations of Vesicles from Amino Acid Based Double Chain Amphiphiles". Langmuir 13, n.º 16 (agosto de 1997): 4480–82. http://dx.doi.org/10.1021/la9701900.

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Feast, George C., Thomas Lepitre, Xavier Mulet, Charlotte E. Conn, Oliver E. Hutt, G. Paul Savage y Calum J. Drummond. "The search for new amphiphiles: synthesis of a modular, high-throughput library". Beilstein Journal of Organic Chemistry 10 (10 de julio de 2014): 1578–88. http://dx.doi.org/10.3762/bjoc.10.163.

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Amphiphilic compounds are used in a variety of applications due to their lyotropic liquid-crystalline phase formation, however only a limited number of compounds, in a potentially limitless field, are currently in use. A library of organic amphiphilic compounds was synthesised consisting of glucose, galactose, lactose, xylose and mannose head groups and double and triple-chain hydrophobic tails. A modular, high-throughput approach was developed, whereby head and tail components were conjugated using the copper-catalysed azide–alkyne cycloaddition (CuAAC) reaction. The tails were synthesised from two core alkyne-tethered intermediates, which were subsequently functionalised with hydrocarbon chains varying in length and degree of unsaturation and branching, while the five sugar head groups were selected with ranging substitution patterns and anomeric linkages. A library of 80 amphiphiles was subsequently produced, using a 24-vial array, with the majority formed in very good to excellent yields. A preliminary assessment of the liquid-crystalline phase behaviour is also presented.
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6

Azum, Naved, Malik Abdul Rub, Anish Khan, Maha M. Alotaibi, Abdullah M. Asiri y Mohammed M. Rahman. "Mixed Micellization, Thermodynamic and Adsorption Behavior of Tetracaine Hydrochloride in the Presence of Cationic Gemini/Conventional Surfactants". Gels 8, n.º 2 (17 de febrero de 2022): 128. http://dx.doi.org/10.3390/gels8020128.

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In this approach, tensiometry and UV-visible techniques are used to determine the effect of cationic gemini and conventional surfactants on tetracaine hydrochloride (TCH), an anesthetic drug. We have estimated micellar, interfacial, and energetic constraints. To gain a deep understanding of their mixed association behavior, the outputs were examined using different theoretical models. The critical micelle concentration for single and mixed amphiphiles was estimated. The cmc values of mixed amphiphiles were found between the individual amphiphiles due to strong attractive interaction (synergism) between the components after mixing. The non-ideal behavior of mixtures was confirmed by the larger values of ideal cmc than the experimental cmc values. The negative values of interaction parameter (β) and values of activity coefficients less than unity indicate strong synergistic interaction between drug and surfactant. The stability of the mixed systems is demonstrated by the negative Gibbs free energy of micellization and excess free energy of micellization. In contrast to a single chain surfactant, a double chain surfactant (gemini) exhibits better interactions with the drug. Spectral measurements (UV-visible spectra) were used to monitor the binding of the drug with surfactant (conventional as well as gemini). Studying these mixed aggregates could help to optimize their compositions and find synergistic properties between TCH monomers and surfactants.
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7

Kato, Shinji y Toyoki Kunitake. "Molecular Design of Black Lipid Membranes (BLM) by Polymerized Double-Chain Ammonium Amphiphiles". Chemistry Letters 20, n.º 2 (febrero de 1991): 261–64. http://dx.doi.org/10.1246/cl.1991.261.

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Nakashima, Naotoshi, Norihiro Yamada y Toyoki Kunitake. "A Fourier transform infrared study of bilayer membranes of double-chain ammonium amphiphiles". Journal of Physical Chemistry 90, n.º 15 (julio de 1986): 3374–77. http://dx.doi.org/10.1021/j100406a014.

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9

Sugimoto, Masakatsu, Kyoko Shibahara, Kenzi Kuroda, Toshikazu Hirao, Hideo Kurosawa y Isao Ikeda. "Bilayer Formation and Its Spectral Behavior of Double-Chain Amphiphiles Having Cinnamate Units". Langmuir 12, n.º 11 (enero de 1996): 2785–90. http://dx.doi.org/10.1021/la9509561.

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Masuyama, Araki, Tomoko Kawano, Yun-Peng Zhu, Toshiyuki Kida y Yohji Nakatsuji. "“Elasticity Index” for the Connecting Groups of Double-Chain Amphiphiles Bearing Two Hydrophilic Groups". Chemistry Letters 22, n.º 12 (diciembre de 1993): 2053–56. http://dx.doi.org/10.1246/cl.1993.2053.

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Tesis sobre el tema "Double-chain Amphiphiles"

1

Paul, Chowdhury Madhurima. "Physicochemical studies on double-chain amphiphiles and their aggregation behavior in different media". Thesis, University of North Bengal, 2018. http://ir.nbu.ac.in/handle/123456789/2692.

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Chia-YaoTseng y 曾珈瑤. "Effects of alkyl chain length on the mixed Langmuir monolayer behavior of ion pair amphiphile/cholesterol with double-chained cationic surfactants". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/88948837921588418301.

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碩士
國立成功大學
化學工程學系碩博士班
98
In this study, mixed Langmuir monolayer behavior of ion pair amphiphile (IPA), hexadecyltrimethylammonium-dodecylsulfate (HTMA-DS), with various additives was investigated by surface pressure-area and surface potential-area isotherms, relaxation curves, and Brewster angle microscopy (BAM) images. The purpose is to understand the effects of alkyl chain length and molar fraction of dialkyldimethylammonium bromide (DXDAB) on the molecular interaction in the HTMA-DS and HTMA-DS/cholesterol monolayers and on the corresponding mixed monolayer stability. The isotherms of the mixed HTMA-DS/DXDAB monolayers indicated that the addition of dihexadecyldimethylammonium bromide (DHDAB) and dioctadecyldimethylammonium bromide (DODAB) led to an apparent condensing effect on the monolayers. However, an unreasonable value of limiting area per molecule was obtained from the isotherm of the mixed monolayer with XHTMA-DS = 0.5. This was because DXDA+ replaced the HTMA+ of HTMA-DS to form a new IPA, DXDA-DS, and the replaced HTMA+ desorbed into the aqueous subphase, resulting in the molecule loss at the interface. In addition, the monolayer relaxation curves suggested that the addition of DHDAB and DODAB could improve the stability of monolayers at condensed states. Nevertheless, with the addition of ditetradecyldimethylammonium bromide (DTDAB), no significant condensing effect was found for the monolayers and no enhancement in the monolayer stability was detected. For the mixed monolayers containing 43 mol% cholesterol, no pronounced effect was found for the alkyl chain length of DXDAB on the monolayer behavior, and the isotherm behavior and morphology of the monolayers seemed dominated by cholesterol. Moreover, the presence of cholesterol in the monolayers could enhance the attractive interaction between the molecules and thus adjust the molecular packing behavior. However, when the monolayers were compressed to reach a surface pressure of 30 mN/m, the added cholesterol could not effectively improve the mixed monolayer stability at the interface, which was probably due to the steric barrier and mismatch occurring between the sterol ring of cholesterol and the hydrophobic parts of HTMA-DS and DXDAB.
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3

Ting-PinChou y 周廷濱. "Effects of alkyl chain length on the molecular packing characteristic of mixed ion pair amphiphile/double-chained cationic surfactant Langmuir monolayers by infrared spectroscopy". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/99250232111337745944.

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碩士
國立成功大學
化學工程學系
102
In this study, infrared reflection-absorption spectroscopy technique is applied to obtain information on the molecular packing properties of mixed IPA/DXDAB monolayers at the air/water interface. The results show that, the HTMA-HS monolayer is stable at the air/water interface while the HTMA-DS monolayer is not. The reason is that the structure of HTMA-DS molecule is asymmetry, and thus the degree of freedom of the carbon tails will be high. For three kinds of DXDAB, the results show that the DODAB monolayer can be stable at the air/water interface and the others can not. It is because DODAB has the longest carbon tails, leading to the strongest molecule interaction. The results of monolayer relaxation experiments show that HTMA-HS and DODAB monolayers can be stable at the air/water interface, while HTMA-DS, DTDAB, and DHDAB monolayers can not. Compared these results with size stability of the vesicles, one can find that vesicles formed of HTMA-HS or DODAB have higher size stability. This suggests that the physical stability of vesicles is controlled by the symmetry structure and number of carbon chains. For the two-component systems, the results show that HTMA+ of IPA will be replaced by DXDA+.This phenomenon will reduce the degree of freedom of the carbon tails, and the mixed IPA/DXDAB monolayers are then stable at the air/water interface. Therefore, adding DXDAB will not only reduce the collision frequency of the vesicles, but also increase the bilayer stability of the vesicles.
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