• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 132
  • 18
  • 17
  • 11
  • 11
  • 5
  • 5
  • 4
  • 3
  • 3
  • 1
  • 1
  • Tagged with
  • 219
  • 48
  • 38
  • 35
  • 30
  • 27
  • 24
  • 16
  • 16
  • 14
  • 14
  • 14
  • 14
  • 14
  • 13
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Spectroscopic investigations of acrylodan dye interactions with poly(amidoamine) and poly(propyleneimine) dendrimers

Rippey, Julie M. January 2008 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2008. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed July 13, 2009). Includes bibliographical references.
52

An analysis of dendritic cooperativity in protein hydrolysis

O'Dell, Jacob Webb. January 2005 (has links) (PDF)
Thesis (M.S.)--Montana State University--Bozeman, 2005. / Typescript. Chairperson, Graduate Committee: Mary J. Cloninger. Includes bibliographical references (leaves 75-77).
53

Characterization of nonlinear optical polymers and dendrimers for electro-optic applications /

Haller, Marnie A. January 2005 (has links)
Thesis (Ph. D.)--University of Washington, 2005. / Vita. Includes bibliographical references (leaves 126-130).
54

The evaluation of dendrimer encapsulated ruthenium nanoparticles, immobilised on silica, as catalysts in various catalytic reactions and the effect of ionic liquids on the catalytic activity

Antonels, Nathan Charles 22 April 2015 (has links)
Ph.D. (Chemistry) / This study discusses the preparation of various sized dendrimer encapsulated ruthenium nanoparticles (RuDEN) with the use of the generation 4 (G4), generation 5 (G5) and generation 6 (G6) hydroxyl-terminated poly(amidoamine) (PAMAM-OH) dendrimers as templating agents. The size of the nanoparticles ranges from 1.1-2.2 nm. The RuDENs were used as nanoparticle solutions in catalytic reactions or immobilised on amorphous silica 60 and silica 100 and subsequently referred to as RuSil catalysts. These catalysts were evaluated in the reduction of 4-nitrophenol, toluene hydrogenation, citral hydrogenation, cinnamaldehyde hydrogenation and styrene oxidation...
55

DEVELOPMENT OF IMMUNOMAGNETIC BEAD ASSAY WITH ELECTROCHEMICAL DETECTION FOR USE IN A MINIATURIZED SENSOR

Purushothama, Shobha 11 October 2001 (has links)
No description available.
56

Dendrimer characterisation and inclusion chemistry with organic substrates and polynucleotides

Garbett, Nichola C. January 2000 (has links)
No description available.
57

Synthesis and catalytic properties of chiral amphiphilic dendritic organocatalysts. / CUHK electronic theses & dissertations collection

January 2008 (has links)
Several series of amphiphilic dendritic organocatalysts 100--112 containing an optically active, polar proline-derived core, bearing [G1]--[G3] nonpolar hydrocarbon dendrons were synthesized by a convergent approach. These compounds were characterized by NMR spectroscopy, mass spectrometry, elemental analysis and size exclusion chromatographic analysis. Such proline-based organocatalysts have been found to give products in high enantioselectivities in asymmetric aldol reactions and Michael additions in emulsion systems. The incorporation of hydrophobic dendrons in our catalyst has the advantages of promoting emulsion formation in water, enhancing the reactivity and selectivity of the asymmetric reactions, and facilitating catalyst recovery after the reactions. / This thesis describes the syntheses of chiral amphiphilic dendritic organocatalysts and their catalytic applications in asymmetric aldol reactions, Michael additions, and Mannich reactions. / Lo, Chui Man. / Adviser: Hak-Fun Chow. / Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3511. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 158-179). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in English and Chinese. / School code: 1307.
58

A library of natural alpha-amino acid-based dendrons synthesis, characterization and self-assembling properties. / Library of natural α-amino acid-based dendrons : synthesis, characterization and self-assembling properties / Library of natural [alpha]-amino acid-based dendrons / CUHK electronic theses & dissertations collection

January 2003 (has links)
"March 2003." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (p. 116-126). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
59

First synthesis and characterization of organoplatinum dendritic necklaces and dendritic networks using an outer sphere-outer sphere connection strategy. / CUHK electronic theses & dissertations collection

January 2003 (has links)
by Leung Cham-fai. / "July, 2003." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (p. 135-150) and index. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.
60

Supramolecular dendronized polymers via quadruple hydrogen bonds.

January 2009 (has links)
Chan, Wing Shong Thierry. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 82-88). / Abstract also in Chinese. / Contents --- p.i / Acknowledgments --- p.iii / Abstract --- p.iv / Abbreviations --- p.vi / Chapter Chapter 1 - --- Dendronized Polymers and Supramolecular Polymers --- p.1 / Chapter 1.1 --- Introduction to Dendrons and Dendrimers --- p.1 / Chapter 1.2 --- Dendronized polymers --- p.4 / Chapter 1.2.1 --- Graft-from Method --- p.5 / Chapter 1.2.2 --- Graft-to Method --- p.7 / Chapter 1.2.3 --- Macromonomer Method --- p.8 / Chapter 1.2.3.1 --- Step Growth Polymerization --- p.9 / Chapter 1.2.3.2 --- Chain Growth Polymerization --- p.10 / Chapter 1.2.3.3 --- Living Chain Growth Polymerization --- p.11 / Chapter 1.3 --- Supramolecular Polymers --- p.12 / Chapter 1.4 --- Supramolecular Dendronized Polymers --- p.13 / Chapter Chapter 2 - --- Design of Supramolecular Dendronized Polymers --- p.18 / Chapter 2.1 --- Hydrogen Bonding --- p.19 / Chapter 2.1.1 --- Binary Characters of Hydrogen Bonding --- p.20 / Chapter 2.2 --- 2-Ureido-4[ 1H]-Pyrimidinone (UPy) --- p.22 / Chapter 2.3 --- Effects of Dendrons on Dimerization Constant of UPy --- p.25 / Chapter 2.4 --- Target Supramolecular Dendronized Polymers --- p.26 / Chapter Chapter 3 - --- Synthesis and Characterization of Supramolecular Dendronized Polymers --- p.28 / Chapter 3.1 --- Retro-Synthesis --- p.28 / Chapter 3.2 --- Synthesis of [G1]-[G3] Bifunctional Protected Monomers --- p.28 / Chapter 3.3 --- Characterization of Intermediates --- p.34 / Chapter 3.3.1 --- 1H NMR Spectroscopy --- p.34 / Chapter 3.3.2 --- 13C NMR Spectroscopy --- p.37 / Chapter 3.3.3 --- Mass Spectroscopy --- p.40 / Chapter 3.3.4 --- Size Exclusion Chromatography (SEC) --- p.40 / Chapter 3.4 --- Deprotection of [G1]-[G3] Biflmctional O-benzyl Protected Monomers --- p.41 / Chapter 3.5 --- Characterization of [G1]´ؤ[G3] Bifunctional Dendronized Monomers --- p.44 / Chapter 3.5.1 --- Characterization of [G1] Dendronized Di-UPy Monomer --- p.44 / Chapter 3.5.2 --- Characterization of [G2] Dendronized Di-UPy Monomer --- p.46 / Chapter 3.5.3 --- Characterization of [G3] Supramolecular Dendronized Di-Upy Polymer --- p.47 / Chapter 3.6 --- Conclusion --- p.49 / Chapter Chapter 4 - --- Properties of Supramolecular Dendronized Polymers --- p.50 / Chapter 4.1 --- Viscosity Measurement --- p.50 / Chapter 4.1.1 --- Introduction --- p.51 / Chapter 4.1.2 --- Viscosity Result At Room Temperature --- p.52 / Chapter 4.1.3 --- Viscosity Result At Different Temperatures --- p.53 / Chapter 4.1.4 --- Viscosity Result In Different Solvents --- p.55 / Chapter 4.2 --- Proton NMR --- p.56 / Chapter 4.3 --- Scanning Electron Microscopy --- p.59 / Chapter 4.4 --- Gelation Property --- p.61 / Chapter 4.5 --- Conclusion --- p.63 / Chapter Chapter 5 - --- Experimental Procedures --- p.66 / Chapter 5.1 --- General Information --- p.66 / Chapter 5.2 --- Experimental Procedures --- p.67 / References --- p.82 / NMR spectra --- p.89

Page generated in 0.0592 seconds