Дисертації з теми "Single surfactant"
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Bardhan, Soumik. "Physicochemical studies on some self organized assemblies of single and mixed surfactant systems." Thesis, University of North Bengal, 2015. http://hdl.handle.net/123456789/1855.
Повний текст джерелаAyewah, Daniel Osagie Oyinkuro. "Characterization of surfactant dispersed single wall nanotube - polystyrene matrix nanocomposite." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1397.
Повний текст джерелаBarnett, Catherine Margaret Eleanor. "Association of Single Nucleotide Polymorphisms in Surfactant Protein A and D with Otitis Media." The University of Waikato, 2007. http://hdl.handle.net/10289/2338.
Повний текст джерелаSAMPATHKUMAR, SETHURAGHAVAN. "INTERFACIAL CHARACTERISTICS AND EBULLIENCE IN AQUEOUS SURFACTANT SOLUTIONS: DYNAMIC SURFACE TENSION AND SINGLE BUBBLE BEHAVIOR." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109001316.
Повний текст джерелаSampathkumar, Sethuraghavan. "Interfacial characteristics and ebulience in aqueous surfactant solutions dynamic surface tension and single bubble behavior /." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1109001316.
Повний текст джерелаWang, Zhiyong, Gang Wang, Haoyuan Qi, Mao Wang, Mingchao Wang, SangWook Park, Huaping Wang, et al. "Ultrathin Two-Dimensional Conjugated Metal-Organic Framework Single-Crystalline Nanosheets Enabled by Surfactant-Assisted Synthesis." Royal Society of Chemistry, 2020. https://tud.qucosa.de/id/qucosa%3A72508.
Повний текст джерелаPal, Prem, Kazuo Sato, Miguel A. Gosalvez, Yasuo Kimura, Ken-Ichi Ishibashi, Michio Niwano, Hirotaka Hida, Bin Tang, and Shintaro Itoh. "Surfactant Adsorption on Single-Crystal Silicon Surfaces in TMAH Solution: Orientation-Dependent Adsorption Detected by In Situ Infrared Spectroscopy." IEEE, 2009. http://hdl.handle.net/2237/13883.
Повний текст джерелаSpohr, Reimar. "Ion Tracks for Micro- and Nanofabrication : From Single Channels to Superhydrophobic Surfaces." Doctoral thesis, Uppsala universitet, Materialfysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-111247.
Повний текст джерелаFennell, John. "The electrochemistry of surfactants on gold single-crystals and of platinum-gold nanorods." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4168/.
Повний текст джерелаDaful, Asfaw Gezae. "Microscopic modeling of the self assembly of surfactants: shape transitions and critical micelle concentrations." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/33596.
Повний текст джерелаPuvvada, Sudhakar. "Theoretical and experimental studies of micellization and phase behavior of aqueous solutions of single and mixed surfactants." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13105.
Повний текст джерелаOdame-Ankrah, Charles Anim. "Studies of Titanium Dioxide Nanoparticles and Surfactants Effects, Singly and in Combinations, on Luminescence Intensity of Some Aromatic Compounds." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etd/1799.
Повний текст джерелаHsu, Shu-Hao, and 許書豪. "Dynamic Surface Effect on Single-Orifice Bubble Formation in Surfactant Solutions." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/81583140579219045541.
Повний текст джерела國立成功大學
化學工程學系
84
In this paper, bubble formation experiments are studied under the constantflow and the intermediate conditions using 99% pure SDS, 95% pure SDS, andTriton X-100 aqueous solutions. Equilibrium surface tensions and dynamic surfacetensions are also measured by the Wilheimy plate method and the maximum bubblepressure method, respectively, for these aqueous solutions. In addition,mixtures of 99% SDS and Triton X-100 are also studied to compare with previousresults from aqueous solutions using single surfactant. From the results of equilibrium surface tension and dynamic surface tension,we learn that Triton X-100 is the strongest, 99% SDS is the weakest, and 95% SDSis in the middle in the ability of decreasing surface tension. Nevertheless, 99%SDS is the fastest in the rate of decreasing surface tension, Triton X-100 isthe slowest, and 95% SDS is in the middle. Besides, from the experiments ofmixtures of 99% SDS and Triton X-100, we learn that the influence of synergisticeffect is not evident in this case. Under constant flow rate condition, we modified Ruff model (1972) to includedynamic surface tension effect, the predicted results show good agreement withthe experimental observations; however, the predicted results using modifiedTsuge and Hibino model (1978) (also considered the dynamic surface tension)deviates from experimental data under intermediate condition. Nevertheless, theexperimental data of surfactant solutions agree well with the predicted resultsusing the original Tsuge and Hibino model which considered the equilibriumsurface tension only.
Xu, Shu-Hao, and 許書豪. "Dynamic Surface Effect on Single-Orifice Bubble Formation in Surfactant Solutions." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/97734415121454658558.
Повний текст джерелаStanislaus, John Bosco [Verfasser]. "Single molecule study of polymer-surfactant interactions / vorgelegt von John Bosco Stanislaus." 2007. http://d-nb.info/985566914/34.
Повний текст джерелаHuffman, Chad B. "Magnetic purification and spectral dependence onpH of surfactant suspended single wall carbon nanotubes." Thesis, 2004. http://hdl.handle.net/1911/18644.
Повний текст джерелаMoore, Valerie C. "Single walled carbon nanotubes: Suspension in aqueous/surfactant media and chirality controlled synthesis on surfaces." Thesis, 2005. http://hdl.handle.net/1911/18785.
Повний текст джерелаRickard, Deborah. "Multiphase, Multicomponent Systems: Divalent Ionic Surfactant Phases and Single-Particle Engineering of Protein and Polymer Glasses." Diss., 2011. http://hdl.handle.net/10161/3934.
Повний текст джерелаThis thesis presents an analysis of the material properties and phase behavior of divalent ionic surfactant salts, and protein and polymer glasses. There has been extensive interest in understanding the phase behavior of divalent ionic surfactants due to the many applications of ionic surfactants in which they come into contact with divalent ions, such as detergency, oil recovery, and surfactant separation processes. One goal of determining the phase boundaries was to explore the option of incorporating a hydrophobic molecule into the solid phase through the micelle-to-crystal bilayer transition, either for drug delivery applications (with a biologically compatible surfactant) or for the purpose of studying the hydrophobic molecule itself. The liquid micellar and solid crystal phases of the alkaline earth metal dodecyl sulfates were investigated using calorimetry, visual inspection, solubilization of a fluorescent probe, and x-ray diffraction. The Krafft temperature and dissolution enthalpy were determined for each surfactant, and partial composition-temperature phase diagrams of magnesium dodecyl sulfate-water, calcium dodecyl sulfate-water, as well as sodium dodecyl sulfate with MgCl2 and CaCl2 are presented. As a proof of concept, fluorescence microscopy images showed that it is, in fact, possible to incorporate a small hydrophobic molecule, diphenylhexatriene, into the solid phase.
The second, and main, part of this thesis expands on work done previously in the lab by using the micropipette technique to study two-phase microsystems. These microsystems consist of a liquid droplet suspended in a second, immiscible liquid medium, and can serve as direct single-particle studies of drug delivery systems that are formed using solvent extraction (e.g., protein encapsulated in a biodegradable polymer), and as model systems with which to study the materials and principles that govern particle formation. The assumptions of the Epstein-Plesset model, which predicts the rate of droplet dissolution, are examined in the context of the micropipette technique. A modification to the model is presented that accounts for the effect a solute has on the dissolution rate. The modification is based on the assumption that the droplet interface is in local thermodynamic equilibrium, and that the water activity in a solution droplet can be used to determine its dissolution (or dehydration) rate. The model successfully predicts the dissolution rates of NaCl solutions into octanol and butyl acetate up to the point of NaCl crystallization. The dehydration of protein solutions (lysozyme or bovine serum albumin) results in glassified microbeads with less than a monolayer of water coverage per protein molecule, which can be controlled by the water activity of the surrounding organic medium. The kinetics of dehydration match the prediction of the activity-based model, and it is shown how the micropipette technique can be used to study the effect of dissolution rate on final particle morphology. By using a stable protein with a simple geometry (lyosyzme), this technique was be used to determine the distance dependence of protein-protein interactions in the range of 2-25 Å, providing the first calculation of the hydration pressure decay length for globular proteins. The distance-dependence of the interaction potential at distances less than 9 Å was found to have a decay length of 1.7 Å, which is consistent with the known decay length of hydration pressure between other biological materials. Biodegradable polyesters, such as poly(lactide-co-glycolide) (PLGA), are some of the most common materials used for the encapsulation of therapeutics in microspheres for long-term drug release. Since they degrade by hydrolysis, release rates depend on water uptake, which can be affected by processing parameters and the material properties of the encapsulated drug. The micropipette technique allows observations not possible on any bulk preparation method. Single-particle observations of microsphere formation (organic solvent extraction into a surrounding aqueous phase) show that as solvent leaves the microsphere and the water concentration in the polymer matrix becomes supersaturated, water phase separates and inclusions initially grow quickly. Once the concentration in the polymer matrix equilibrates with the surrounding aqueous medium, the water inclusions continue to grow due to dissolved impurities, solvent, and/or water-soluble polymer fragments resulting from hydrolysis, all of which locally lower the water activity in the inclusion. Experiments are also presented in which glassified protein microbeads were suspended in PLGA solution prior to forming the single microspheres. This technique allowed the concentration of protein in a single microbead/inclusion to be determined as a function of time.
Dissertation
Steinhausen, Matthias. "Numerical simulation of single rising bubbles influenced by soluble surfactant in the spherical and ellipsoidal regime." Master's thesis, 2018. https://tuprints.ulb.tu-darmstadt.de/8296/1/Matthias_Steinhausen_MT.pdf.
Повний текст джерелаChen, Yong-YI, and 陳勇毅. "Study on the Effet of Surfactant Adding and Ion Implantation Process in the Anisotropic Etching of Single-Crystal Silicon." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/38425154770072719215.
Повний текст джерела國立高雄應用科技大學
光電與通訊研究所
98
The purpose of this dissertation is to study the etching effect of single-crystal silicon in the surfactant-added tetramethyl ammonium hydroxide (TMAH) solutions and the etch stop effect of doped silicon in TMAH solutions. In this study, the V-shaped three-dimensional suspended structures were fabricated in the surfactant-added TMAH. Furthermore, the single-crystal silicon membranes and <111>-oriented single-crystal silicon infrared micro-emitters were completed by using BF2 implantation and anisotropic etching processes. In our work, 0.1% volume ratio Triton X-100 was used as the surfactant in 25wt% TMAH solution, which was employed to restrain the etch rate of <110>-oriented silicon. The etch-stop <110>-oriented surface was observed obviously in this experiment results. The impurities, such as boron, phosphorus, nitrogen, arsenic, argon and boron fluoride, were implanted into single-crystal silicon wafers in order to improve the etching selectivity. The etch experiment shows the etch selectivity of the undoped <100>-oriented silicon to BF2 doped <111>-oriented silicon is 12899:1 in 5wt% dual doped TMAH. Single-crystal silicon membranes with a thickness of 200 nm and <111>-oriented single-crystal silicon infrared micro-emitters were fabricated by using BF2 implantation and anisotropic etching. The sheet resistance and the temperature coefficient of resistance (TCR)of infrared micro-emitter are 69Ω/sq and 0.0639 %/℃ respectively.
Huang, Hsiang-Yun, and 黃湘雲. "The Modeling of Single-Walled Carbon Nanotubes in Ionic Surfactant Aqueous Solutions based on DLVO Theory and Coarse-grained Molecular Dynamic Simulation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/02128067608634297076.
Повний текст джерела國立交通大學
材料科學與工程學系所
104
The dispersion of the single-walled carbon nanotubes (SWCNTs) in aqueous solutions has been an important issue. However, it is a challenging task since it requires the understanding to both macroscopic properties of the solution and the colloidal mechanism in the molecular level. In this work, a simulation framework which combines the coarse-grained molecular dynamics (MD) simulations and the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, is developed to predict the stability of the SWCNTs in aqueous solutions. The surfactant used here is sodium dodecyl sulfate (SDS). The adsorption of the solutions with different concentration of SDS is simulated. Next, the Langmuir isotherm model is used to find the relationship between the amount of the adsorbed SDS and the bulk SDS concentration. With the increasing number of the SDS covered on SWCNTs, the surface charge density is also enhanced, and thus, greater electrical double layer repulsion is achieved to prevent the aggregation of the SWCNTs. The potential energy barrier as a function of SDS concentration and radius of the SWCNT then can be obtained by using DLVO theory. It can predict the dispersion of the SWCNTs in the solution. The results suggest an optimal surfactant concentration which can stabilize the SWCNTs in the solution. The finding have good agreement with those in experiments. Many features of the solution, such as the relationship between radius of the SWCNTs and surfactant adsorption, are accurately predicted. We not only investigate the structural configuration of SDS ions absorbed on the SWCNT surface, but also discuss the configuration and interface characteristics of SDS self-assembled micelles. In addition, the distribution of SDS ions can affect the distribution of the sodium counterions in the solution. The current framework is expected to provide the guidance for the design of the concentration of SDS surfactants and the radius of SWCNTs in dispersed experiments.
"Solubility, length characterization, and cryo-TEM of pristine and functionalized single-walled carbon nanotubes in surfactant and superacid systems, with application to spinning SWNT fibers." Thesis, 2010. http://hdl.handle.net/1911/62052.
Повний текст джерелаSavva, Kleopatra. "A prospective randomized, double blind, placebo-controlled trial of a single dose of surfactant as rescue therapy for infants less than 1000grams who are not ventilated." Thesis, 2014.
Знайти повний текст джерелаBaker, Michael C. "The effects of surfactants on single droplet vapor explosions." 1991. http://catalog.hathitrust.org/api/volumes/oclc/23960635.html.
Повний текст джерелаTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 39-40).
Krüger, Carsten. "Liquid Crystal Microswimmers - from single entities to collective dynamics." Doctoral thesis, 2016. http://hdl.handle.net/11858/00-1735-0000-002B-7CA4-2.
Повний текст джерела"Studies of Surfactants and Titanium Dioxide Nanoparticles Effects, Singly And in Combinations, on Luminescence Intensity of Some Aromatic Compounds." East Tennessee State University, 2009. http://etd-submit.etsu.edu/etd/theses/available/etd-0708109-131456/.
Повний текст джерелаLiao, Chun-Yen, and 廖俊彥. "Synthesis and Study of Hydrogen-Bonded Bent Core Liquid Crystalline Mixtures Containing C60 Surface-Modified with Single and Double Benzoic Acid Surfactants." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/09027417812510703974.
Повний текст джерела國立交通大學
材料科學與工程學系所
102
In this study we prepared novel composites materials from the hydrogen-bonded bent-core liquid crystal (LC) host and different mole ratios (0–90 mol%) of the surface-modified fullerenes(C60). The chemical structures of these compounds were characterized by 1H-NMR, 13C-NMR, IR spectra, MS as well as elemental analysis, and the liquid crystalline phases and mesomorphic behavior of all the compounds were identified from the results of DSC, POM, electro-optical measurement and XRD. The mesomorphic properties of the composites, including their mesophasic types and ranges, values of Ps, and saturated electric field were adjustable by varying the doping concentrations of fullerenes. By increasing the concentration of fullerenes, the polarity of the SmCP phase in the composite varied sequentially from anti-ferroelectricity to ferroelectricity. Futhermore, adding a little amount of surface-modified fullerenes make the mixtures possesses the best Ps value and saturated electric field.
Chiocchini, Claudia [Verfasser]. "The surfactin biosynthetic complex of Bacillus subtilis : COM domain-mediated biocombinatorial synthesis, and single step purification of native multi-modular NRPSs and multi-enzyme complexes / vorgelegt von Claudia Chiocchini." 2006. http://d-nb.info/982586426/34.
Повний текст джерела