Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 56 for “"LCST"”.
-
Syntax of Phase Transition Peptide Polymers with LCST and UCST Behavior
… above a lower critical solution temperature (LCST) or below an upper critical solution temperature (UCST). We show that this syntax ranges from phase transition polymers composed of simple repeats of a few amino acids to polymers whose syntax resembles the complex sequence of peptide drugs and …
-
Entwicklung neuer farbstoffmarkierter Polymere zur Visualisierung des LCST-Phasenübergangs in wässriger Lösung
Ziel der Arbeit war die Entwicklung von farbstoffmarkierten Polymeren, die einen temperaturgetriebenen Knäuel-Kollaps-Phasenübergang in wässriger Lösung ("thermo-responsive Polymere") zeigen und diesen in ein optisches Signal übersetzen können. Solche Polymere unterliegen innerhalb eines kleinen …
-
Numerical methods for frequency dependent line parameters with applications to microstrip lines and pipe-type cables
… include a Linear Current Subconductor Technique (LCST), and an advanced method of subareas (ANS). These methods are derived from the traditional subconductor method and the traditional method of subareas, respectively. LCST combines the simplicity of the traditional subconductor method with the …
-
Introduction of a thermo-sensitive non-polar species into polyelectrolyte multilayer capsules for drug delivery
… that has a Lower Critical Solution Temperature (LCST) around 32oC; above this temperature PNIPAM is insoluble in water and collapses. It is also known that with the addition of salt, the LCST decreases. This work shows Differential Scanning Calorimetry (DSC) and Confocal Laser Scanning Microscopy …
-
PIPOX-PEP : kontrollierte Synthese und Aggregationsverhalten von Blockcopolymeren mit schaltbarer Hydrophilie
… bei langen Zeiten oberhalb der LCST irreversibel sphärische Strukturen bildet, die eine hierarchische Struktur besitzen und bei denen es sich möglicherweise um "large compound micelles" handelt. PIPOX-PEP kann in wässeriger Lösung bei langen Zeiten oberhalb der LCST "cottonball" …
-
Poly(NIPAAm-co-AAm)-gold nanoshell composites for optically-triggered cancer therapeutic delivery
… at their lower critical solution temperature (LCST). When transitioning from below to above the LCST, the hydrogel material expels large amounts of water and absorbed molecules. This phase change can be optically triggered by embedded gold-silica nanoshells, which rapidly transfer near-infrared …
-
Self-assembly behavior in hydrophilic block copolymers
… Above the low critical solution temperature (LCST) of poly(N-isopropylacrylamide), the structure collapsed into micelles with a hydrophobic PNIPAM core and glycosylated exterior. This collapse was found to be reversible. As a result, the structures showed a temperature-dependent interaction …
-
Elastin-Like Peptide Dendrimers: Design, Synthesis, and Applications
… components in biomaterials due to their LCST (lower critical solution temperature) behavior at a characteristic transition temperature (Tt). While linear ELPs have been well investigated, few reports focused on branched ELPs. Using lysine (Lys, with an additional side-chain amine) as …
-
Depositional systems, sequence architecture, and controlling factors of an Eocene stratigraphic sequence at Minfeng steep margin of Dongying depression, eastern China
… contraction (LEECST), and late contraction (LCST). EEST is the thickest and diagnostic by the best-developed marginal and basinal fan systems, displaying a prominent retrogradational stacking pattern. LEEST has the largest basin size with most widespread profundal-sublittoral deposits, but …
-
Synthesis and characterization of tethered poly(n-isopropylacrylamide) for quantitative cell adhesion studies
… below its lower critical solution temperature (LCST ~ 32\uf0b0C). This thesis reports on grafted PNIPAAm brushes, synthesized using a relatively simple and rapid method which allows atom transfer radical polymerization (ATRP) in presence of air. In this study the structure, purity and thermally …
-
Novel Precursors for Polymer-Protein-Conjugate Synthesis via Reversible Addition-Fragmentation Chain Transfer Polymerization
… aggregates at pH 4.5 and temperatures above LCST, whereas micelles formed at pH 5-7 and temperatures above LCST. At pH 5.6 and 50 °C, only micelles were found, whereas, at lower temperatures, larger aggregates and micelles coexist. Formation of larger aggregates by hydrogen bonding …
-
Entwicklung neuer triphiler, fluorkohlenstofffreier Blockcopolymere und Untersuchung ihrer Eigenschaften für Multikompartiment-Mizellen
… dessen Homopolymer eine LCST-Phasenübergang (LCST, engl.: lower critical solution temperature) bei ca. 36°C aufweist. Das Modell-System 2 bestand aus dem permanent hydrophilen Block Poly(2-(Methylsulfinyl)ethylacrylat), dem permanent hydrophoben Block …
-
Polymers as directing agents for motions of chemical and biological species
… Above the lower critical solution temperature (LCST) of 32°C, the collapse of the water swollen chains, determined by ellipsometry, depends on the grafting density and molecular weight. Ellipsometry, radio assay, and fluorescence imaging demonstrated that, below the LCST, the brushes repel …
-
Engineering of poly(2-oxazoline)s for a potential use in biomedical applications
… into micelles when heated above its LCST, for a short period of time (< 1h30). When annealed for a longer time (> 1h30), crystallization-driven self-assembly led to the formation of different morphologies (fiber rods and cross-linked micelles).
-
Ratiometric copper(II) indicators based on poly(n-isoproprylacrylamide) and fluorescence resonance energy transfer
… above the lower critical solution temperature (LCST) of this copolymer brings about a large increase in fluorescence resonance energy transfer (FRET). Addition of Cu(II) to the aggregated copolymer introduces charge onto the backbone, causing the copolymer to deaggregate with a resulting …
-
Structure, Dynamics and Association of Thermosensitive Core-Shell Particles
… particles reversibly aggregate above the LCST. The kinetics of reversibility of the phenomenon was investigated by DLS. The rheological measurements in the semi-dilute and concentrated regime the onset of the attractive interactions above the LCST leads to a strong thickening of the …
-
Synthesis and self-assembly of multiple thermoresponsive amphiphilic block copolymers
… Especially the localization of the low-LCST block (A) had a large influence on the aggregation behavior. Above the first cloud point, aggregates were only observed when the A block was located at one terminus. Once placed in the middle, unimolecular micelles were observed which showed …
-
Factors Affecting Size and Swelling of Poly(ethylene glycol) Hydrogel Microspheres Formed in Aqueous Sodium Sulfate Solutions
The lower critical solution temperature: LCST) behavior of poly(ethylene glycol): PEG) in aqueous sodium sulfate solutions was exploited to fabricate hydrogel microspheres under mild conditions without the use of other monomers, polymers, surfactants or organic solvents. Reactive PEG derivatives …
-
Enhancing microalgal biomass harvesting efficiency using thermoresponsive polymers
… that the lower critical solution temperature (LCST) of PNIPAM decreases with increasing concentration, with the rate of decrease attenuating at higher molecular weights. Notably, amine content did not exert a significant influence on the LCST. The efficacy of these properties on the harvesting …
Page 1 of 3