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Tesi sul tema "Small-angle light scattering"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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1

Dahlgren, Eric D. "Small angle light scattering analysis of tissue." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0111102-171921.

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2

Van, Heiningen Jan. "Ultra-small angle light scattering : apparatus design optimization." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84092.

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Abstract (sommario):

Ultra-small angle light scattering (USALS) is a technique used to probe large average spatial and temporal structure of soft condensed matter complementary to microscopy. Limited information is available on the design and features of a multi-speckle CCD-based USALS apparatus. The optics of such a setup are described followed by an optimization scheme involving ray tracing that can be used to choose the optimum lenses by taking into account the finite spot size due to lens aberrations, diffraction, and the CCD pixel size. Results of calculations of the optimization scheme are presented f

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3

Saito, Shin. "Light Scattering and Small-Angle Neutron Scattering Studies on Shear-Induced Structures in Semidilute Polymer Solutions." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150694.

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4

Schmidt, Nico [Verfasser]. "Phase transformation behaviour of polylactide probed by small angle light scattering / Nico Schmidt." Paderborn : Universitätsbibliothek, 2020. http://d-nb.info/1209601370/34.

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5

Mokhtari, Tahereh. "The effect of shear on colloidal aggregation and gelation studied using small-angle light scattering." Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/280.

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6

Kozan, Mehmet. "CHARACTERIZATION OF COLLOIDAL NANOPARTICLE AGGREGATES USING LIGHT SCATTERING TECHNIQUES." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/567.

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Abstract (sommario):

Light scattering is a powerful characterization tool for determining shape, size, and size distribution of fine particles, as well as complex, irregular structures of their aggregates. Small angle static light scattering and elliptically polarized light scattering techniques produce accurate results and provide real time, non-intrusive, and in-situ observations on prevailing process conditions in three-dimensional systems. As such, they complement conventional characterization tools such as SEM and TEM which have their known disadvantages and limitations. In this study, we provide a thorough l

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7

Mokhtari, Tahereh. "Studies of the effects of shear on colloidal aggregation and gelation using small angle light scattering." Diss., Kansas State University, 2007. http://hdl.handle.net/2097/522.

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Doctor of Philosophy<br>Department of Physics<br>Christopher M. Sorensen<br>We investigated the effect of shear on the structure and aggregation kinetics of unstable colloids using small angle light scattering. We used an aqueous suspension of 20 nm polystyrene latex microspheres and MgCl[subscript]2 to induce aggregation. The sample was only sheared once for approximately 33 sec at different times, typically 1 min, 5 min, or 15 min, after the onset of aggregation. The average shear rate was in the range of 0.13 - 3.56 sec[superscript]−1 , which was in a laminar regime. The unsheared samp

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8

Mokhtari, Tahereh Mokhtari Tahereh. "Studies of the effects of shear on colloidal aggregation and gelation using small angle light scattering." Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/522.

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Thesis (Ph. D.)--Kansas State University, 2007.<br>Title from electronic thesis title page. Revision of master's thesis: The effect of shear on colloidal aggregation and gelation studied using small-angle light scattering. 2007. Includes bibliographical references.

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9

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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10

Selomulya, Cordelia Chemical Engineering &amp Industrial Chemistry UNSW. "The Effect of Shear on Flocculation and Floc Size/Structure." Awarded by:University of New South Wales. Chemical Engineering and Industrial Chemistry, 2002. http://handle.unsw.edu.au/1959.4/18226.

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The effect of shear on the evolution of floc properties was investigated to analyse the flocculation mechanisms. Little fundamental attention has been given to the shear influence that often creates compact aggregates, while the floc characteristics might differ in other aggregating conditions. It is thus crucial to understand how flocs evolve to steady state, if their properties are to be 'tailored' to suit subsequent solids-liquid separation processes. In this work, flocculation of monodisperse latex particles of various sizes (60, 380, and 810 nm diameter) via electrolyte addition was carri

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11

Bastardo, Zambrano Luis Alejandro. "Self assembly of surfactants and polyelectrolytes in solution and at interfaces." Doctoral thesis, KTH, Ytkemi, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-425.

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This thesis focuses on the study of the interactions between polyelectrolytes and surfactants in aqueous solutions and at interfaces, as well as on the structural changes these molecules undergo due to that interaction. Small–angle neutron scattering, dynamic, and static light scattering were the main techniques used to investigate the interactions in bulk. The first type of polymer studied was a negatively charge glycoprotein (mucin); its interactions with ionic sodium alkyl sulfate surfactants and nonionic surfactants were determined. This system is of great relevance for several application

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12

Ivanov, Ivan Yavorov. "Etude biophysique et structurale du complexe de réplication des virus à ARN négatif." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENV083/document.

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Les rhabdovirus, dont les virus de la stomatite vésiculaire (VSV) et de la rage (RAV) constituent des prototypes, sont des virus enveloppés dont le génome est constitué d'une seule molécule d'ARN simple brin de polarité négative qui font partie de l'ordre des Mononegavirales (MNV). La machinerie de transcription/réplication de ces virus est constituée de l'ARN génomique et de trois protéines qui sont communes à tous les virus de l'ordre des MNV, la (N) qui encapside le génome viral, la grande sous-unité de l'ARN polymérase ARN dépendante (L) et la phosphoprotéine (P) qui est un cofacteur non-c

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13

YOSHIDA, SHUNSUKE. "IN VITRO CHARACTERIZATION OF MESENCHYMAL STEM CELL-SEEDED TENDON IMPLANTS." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1070550904.

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14

Siegemund, Thomas. "Structure and properties of drug-loaded polymeric nanoparticles targeting β-amyloid". Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-70212.

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Abstract (sommario):

Polymere Nanopartikel sind ein vielversprechender Ansatz für die Diagnose und Therapie von Krankheiten. Sie ermöglichen den Einsatz von schwerlöslichen oder instabilen Wirkstoffen. Ein weiterer Vorteil ist die Möglichkeit das Targetings, durch gezielte Modifikationen des Nanopartikels wird der Wirkstoff zum Zielort transportiert und kann dort in der gewünschten Form freigesetzt werden; dadurch könnten bei erhöhter Wirksamkeit die Nebenwirkungen von Medikamenten reduziert werden. Ziel dieser Arbeit war die Untersuchung von physikalischen und biochemischen Eigenschaften von Nanopartikeln besteh

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15

Hubbard, Joshua A. "A study of aerodynamic deaggregation mechanisms and the size control of NanoActive™ aerosol particles." Thesis, Kansas State University, 2006. http://hdl.handle.net/2097/173.

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Master of Science<br>Department of Mechanical and Nuclear Engineering<br>Steven J. Eckels<br>Christopher M. Sorensen<br>Large specific surface areas and high concentrations of reactive edge and defect sites make NanoActive™ metal oxide powders ideal chemical adsorbents. These powders are dispersed in aerosol form to remediate toxic wastes and neutralize chemical and biological warfare agents. In the destructive adsorption of toxic chemicals, effective application requires particles be as small as possible, thus, maximizing surface area and number of edge and defect sites. Other applicatio

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16

Gallois, Charlotte. "Etude des propriétés physico-chimiques de suspensions de boehmite. Application aux supports catalytiques." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066553/document.

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La poudre de boehmite, précurseur de l’alumine utilisée pour la production de supports catalytiques variés, est produite suite à une étape de séchage par atomisation. Cet oxyhydroxyde d’aluminium est composé de particules anisotropes chargées. Ces dernières années, il a été ont montré que les propriétés physico-chimiques des suspensions avaient une influence sur les caractéristiques des poudres. La morphologie des grains (sphère creuse, tore…) ainsi que les propriétés des poudres (dispersibilité, résistance mécanique…) peuvent être modifiées en jouant sur les caractéristiques des suspensions.C

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17

Colard-Itté, Jean-Rémy. "Synthèses et études physico-chimiques de matériaux à base de moteurs moléculaires rotatifs photoactivables." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF044.

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Ce manuscrit décrit la synthèse d’un moteur moléculaire rotatif photoactivable. Il est montré que la molécule cible peut être intégrée dans un réseau de chaînes PEG, et que l’irradiation UV du matériau obtenu mène à sa contraction à macroscopique. Ces mouvements moléculaires collectifs permettent donc de convertir de l’énergie lumineuse pour produire un travail mécanique de huit ordres de grandeur au-delà de leur échelle. Une combinaison d’études de rhéologie et de diffusion de neutron a permis de définir les paramètres de formation de gels pour obtenir une contraction maximale, mais aussi l’o

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18

McNamara, Joseph E. "Monte Carlo, small angle light scattering, and dynamic light scattering studies of dilute polymer solutions." 2005. https://scholarworks.umass.edu/dissertations/AAI3193925.

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The adsorption of negatively charged polymer, negative/neutral block copolymer and a polyampholyte to patterned surfaces is investigated using off-lattice Monte Carlo simulations. The surface is decorated by stripe and checkerboard patterns of mixed charges. The polymer has periodic charge segments, which potentially match the periodicity of the surface pattern. Results show that the chain entropy of a flexible polymer disrupts and prevents full pattern recognition. Quantities such as average adsorption energy and the radii of gyration of the adsorbed polymer are calculated and found to be dic

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19

tung, Hsiao yu, and 蕭有彤. "Calibration and Applications of Small Angle Light Scattering Measuring System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/11639386475186531918.

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碩士<br>國立中正大學<br>化學工程研究所<br>101<br>Light scattering is widely used in various fields to probe the structural and dynamic properties of a wide range of materials. Light scattering is also a nondestructive testing process. The major advantage of SALS (Small angle light scattering) lies in its ability to provide structural information about disordered systems on micrometer scales. SALS is a particularly useful tool for studying polymer aggregation, biological systems and colloids, etc. This study aims at calibrating a homemade SALS apparatus and applying it to C60 solutions. The calibration was ca

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20

(8775689), Luis Palacio. "SMALL ANGLE SCATTERING OF LARGE PROTEIN UNITS UNDER OSMOTIC STRESS." Thesis, 2020.

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<div>Large protein molecules are abundant in biological cells but are very difficult to study in physiological conditions due to molecular disorder. For large proteins, most structural information is obtained in crystalline states which can be achieved in certain conditions at very low temperature. X-ray and neutron crystallography methods can then be used for determination of crystalline structures at atomic level. However, in solution at room or physiological temperatures such highly resolved descriptions cannot be obtained except in very few cases. Scattering methods that can be used to stu

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21

Liu, Cheng-Ping, and 劉正平. "Dynamic Light Scattering and Small Angle Neutron Scattering from Dilute and semi-dilute Poly(vunyl alcohol)-Borax-D2O Solution." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/83119005031869522727.

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碩士<br>元智大學<br>化學工程研究所<br>88<br>Dynamic Light Scattering and Small Angle Neutron Scattering from Dilute and Semi-dilute Poly(vinyl alcohol)-Borax-D2O Solutions Student：Cheng-Ping Liu Advisor：Dr. T.L. Yu Institute of Chemical Engineering Yuan-Ze Iniversity Abstract Poly (vinyl alcohol) forms di-diol complex with borate ion in aqueous solution. In dilute solution, the di-diol complex is formed through intra-molecular crosslinking reaction. In semidilute or high PVA concentrations where the polymer molecules entangle wi

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22

Doncom, K. E. B., Anaïs Pitto-Barry, H. Willcock, A. Lu, B. E. McKenzie, N. Kirby, and R. K. O'Reilly. "Complementary light scattering and synchrotron small-angle X-ray scattering studies of the micelle-to-unimer transition of polysulfobetaines." 2015. http://hdl.handle.net/10454/15384.

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Yes<br>AB and ABA di- and triblock copolymers where A is the hydrophilic poly(oligoethylene glycol methacrylate) (POEGMA) block and B is a thermo-responsive sulfobetaine block [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (PDMAPS) were synthesised by aqueous RAFT polymerisation with narrow dispersity (ĐM ≤ 1.22), as judged by aqueous SEC analysis. The di- and triblock copolymers self-assembled in salt-free water to form micelles with a PDMAPS core and the self-assembly of these polymers was explored by SLS and TEM analysis. The micelles were shown, by DLS analysis, to

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23

Chou, Che-Min, and 周哲民. "Studies on Structural Formation of Polymer Physical Gels by Time-Resolved Small-Angle Light Scattering." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/37046658366203704939.

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博士<br>國立臺灣科技大學<br>高分子工程系<br>92<br>Gelation is the phase transition from a collection of finite clusters to a state with the formation of an infinite network. The essential physical feature of a gel is its geometrical connections, and hence theoretical progress generally emphasizes percolation phenomena to gelation theory. In addition to this, an even more noteworthy subject is the nature and formation of network junctions in physical gels. Thermoreversible physical gel is a three-dimensional network of polymer chains cross-linked by physical junctions, and it can arise either as the result of

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24

Jiang, Ming-Yu, and 江茗妤. "Studies on Network Structure of Agarose Hydrogels by Time-Resolved Small-Angle Light Scattering Analysis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/eu3g3z.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>102<br>Time-resolved small-angle light scattering (TRSALS) is an important technique to study the temporal spatial complexity of soft matter on a mesoscopic length scale. In this thesis, from the Hv scattering and time-trace rheological experiments ,we suggest that the molecules should exhibits a worm-like chain with the single helix conformation in sol state and show that the gelation process of the agarose hydrogel can be divide into three stages: (i) the structural fluid stage (t < tnucl) (ii) the ripening stage(tnucl < t < taging), the fibrillar network is for

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25

Hsu, Di-Yao, and 許迪堯. "Studies on Phase Separation of Poly(ethylene glycol)/Poly(ethylene glycol-ran-propylene glycol) Mixtures by Time-Resolved Small-Angle Light Scattering." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/80688218540134114659.

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博士<br>國立臺灣科技大學<br>材料科學與工程系<br>104<br>During the past decades, many remarkable results have been achieved in the phase separation of polymer mixtures, especially for the spinodal decomposition, while the small-angle light scattering (SALS) plays an important role. In view of the improvement of scattering technique and subsequent data analysis, we have enough ability to study the complex phase separation behavior of PEG/PEG-ran-PPG polymer mixtures by using time-resolved small-angle light scattering apparatus. 　　In this study, since involving different area researches of phase separation, we wil

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26

Saldanha, Oliva. "Tracking Assembly Kinetics of Intermediate Filaments." Doctoral thesis, 2016. http://hdl.handle.net/11858/00-1735-0000-0023-3E14-3.

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27

Bogomolova, Anna. "Samoorganizace ve směsích surfaktantů a polymerů s komplexní strukturou citlivých ke změně vnějšího prostředí." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-334588.

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Title: Self-assembly in mixture of surfactants and stimuli-responsive polymers with complex architecture Author: Anna Bogomolova Department: Physical and Macromolecular Chemistry Supervisor: PhD. Sergey K. Filippov, IMC AS CR, v.v.i. Supervisor's e-mail address: filippov@imc.cas.cz Abstract: The issue of construction of complex multi-block copolymers is currently one of the most researched areas. It became a logic consequence of the continuous development in polymer chemistry. Nowadays, a great interest is attracted to multi- responsive block copolymers. As a rule, they consist of hydrophilic,

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28

Siegemund, Thomas. "Structure and properties of drug-loaded polymeric nanoparticles targeting β-amyloid". Doctoral thesis, 2010. https://ul.qucosa.de/id/qucosa%3A11216.

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Polymere Nanopartikel sind ein vielversprechender Ansatz für die Diagnose und Therapie von Krankheiten. Sie ermöglichen den Einsatz von schwerlöslichen oder instabilen Wirkstoffen. Ein weiterer Vorteil ist die Möglichkeit das Targetings, durch gezielte Modifikationen des Nanopartikels wird der Wirkstoff zum Zielort transportiert und kann dort in der gewünschten Form freigesetzt werden; dadurch könnten bei erhöhter Wirksamkeit die Nebenwirkungen von Medikamenten reduziert werden. Ziel dieser Arbeit war die Untersuchung von physikalischen und biochemischen Eigenschaften von Nanopartikeln besteh

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29

Delisavva, Foteini. "Asociace polymerů s amfifilními sloučeninami (surfaktanty) ve vodných roztocích." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-371354.

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Title: Self-assembly of polymers with amphiphilic compounds (surfactants) in aqueous solutions Abstract: This PhD Thesis is devoted to the co-assembly in systems containing electrically charged polymers (polyelectrolytes and block copolymers containing polyelectrolyte sequences). I studied the interactions between block copolymers and oppositely charged surfactants in aqueous solutions, and the structure and properties of co-assembled nanoparticles by a combination of several experimental methods. I found that the spontaneous formation, solubility and stability of complex nanoparticles depend

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