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Showing 1 to 20 of 69 for “"HEMA"”.
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Vergleichende Untersuchungen der Hämokompatibilität unterschiedlicher Polymere (Polypropylen, Cuprophan, PDLLA, PDLLA/HEMA) im Hinblick auf Thrombozytenadhäsion und -aktivierung
… cuprophane (non-resorbable) and PDLLA, PDLLA/HEMA (resorbable)) are compared with regard to their haemocopatibility and suitability as an intravascular implant. The biomaterials are first incubated with isolated, discoid and non-activated platelets, drawn from fresh human blood. …
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Filmes biocompatíveis obtidos da polimerização a plasma das misturas dos monômeros HEMA/DEAEMA e THFMA/MOx para aplicações em drug delivery
… a polimerização de duas misturas, uma entre HEMA e DEAEMA, outra entre THFMA e MOx, algumas proporções das misturas foram testadas, mas para a mistura THFMA:MOx apenas uma obteve sucesso. O processo de polimerização se deu ao aplicar o APPJ sobre substratos aspergidos com as misturas …
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Analisi morfologica e molecolare di cellule da colture primarie umane esposte a resine biocompatibili
… of materials. 2-Hydroxyethyl methacrylate (HEMA) is one of the major components released from dental adhesives. Cytotoxic effects due to high concentrations of HEMA have already been investigated, but the influence of minor toxic concentrations for long-term exposition on specific proteins …
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Adsorption behaviour of molecularly imprinted-beta-cyclodextrin polymers prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization for selective recognition of benzylparaben
… functionalized β-cyclodextrin polymer; RAFT-MIP(HEMA-β-CD). The RAFT-MIP(HEMA-β-CD) was synthesized based on the hydroxylethyl-methacrylate functionalized β-cyclodextrin (HEMA-β-CD) monomer and was prepared by the RAFT polymerization process in bulk polymerization method. The molecularly …
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Improved swellable polymer microspheres for chemical sensing
… including 2-hydroxyethyl methacrylate (HEMA), methyl methacrylate (MMA) and styrene. Microparticles made of DMAEMA and HEMA did not generate a measurable turbidity with pH changes. When MMA was added as a third monomer in the copolymer, swelling properties improved. Particles of DMAEMA, …
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Entwicklung und Charakterisierung thermotroper Polymerblends
Thema der Arbeit war die Charakterisierung und gezielte Optimierung von thermotropen Schichten. Diese Polymerblends trüben oberhalb einer einstellbaren Temperatur reversibel ein und dienen als Überhitzungs-schutz in Verglasungen oder transparenten Wärmedämmungen. Schwerpunkt bildeten rheologische …
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Development and Evaluation of 3D-Printed Cardiovascular Stents
… A combination of 2-hydroxy ethyl methacrylate (HEMA) and methacrylate graphene oxide (MeGO) was used to enhance the mechanical properties and loaded with resveratrol (RSL) to efficiently recover endothelial cell function. The biocompatibility of the 3D-printed stent was evaluated using in vitro …
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Synthesis of novel cylic monomers for hydrogel polymers
… derivatives with 2-hydroxyethyl methacrylate (HEMA), to give a completely new range of hydrogel materials. It was thought that hydro gels incorporating hydrophilic derivatives of DHCD could have good mechanical properties and good water binding ability. A model compound for cis-DHCD was sought, …
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Synthesis of linear copolymers and of polymer brushes substituted with spiropyran groups : a step towards light driven molecular walkers
… well-defined linear copolymers, like P(MMA-co-HEMA), P(BA-grad-HEMA-TMS), P(BA-co-HEA-TMS) and P(BMA-co-HEMA-TMS), were prepared via ATRP and RAFT polymerization. Even highly complex polymer brush architectures with different grafting densities, a highly dense grafted, a less dense grafted and …
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Entwicklung einer biodegradierbaren Harnleiterschiene : In-vitro-Analytik von Poly(D,L-Lactid) als Homo- und Copolymer, Formgebungs-Technologie, Oberflächenmodifizierung und tierexperimentelle Untersuchung im Schaf-Modell
… modifications with hydroxyethylenemethacrylate (HEMA) and oligoethyleneoxidemonomethacrylate (OEOMA) were analyzed with regard to cytotoxicity and cell adhesion. Methacrylates have minimized protein and cell adhesion and degradation of non-toxic products. All polymers exhibited a high degree of …
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Probing Morphology, Transport and Local Intermolecular Interactions in Polymeric Materials via NMR Diffusometry and Spectroscopy
… methacrylate-co-methyl methacrylate (HEMA-co-MMA), which greatly differ in glass transition temperature, in order to understand the fundamental relationships from polymer chain dynamics and small molecule diffusion. From observations of the micron scale diffusion of these materials we …
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Microfluidic cell culture chambers with nanoporous walls for chemical communication
… methacrylateco-ethylene dimethacrylate) (HEMA-EDMA), to fabricate a microwell array with 105 individual culture chambers. Pore size of HEMA-EDMA was confirmed by ESEM imaging to be less than 200 nm, adequate for isolating all identified bacteria. We have video-recorded fluorescence labeled …
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Finite Element Analysis Of A Test Specimen For Strength Of A Co-polymer Layer At A Bone-implant Interface
… of a co-polymer of 2-hydroxyethylmethacrylate (HEMA) and methylmethacrylate (MMA), so that it can be applied as an interfacial layer between bone cement and steel implants to improve their performance and life. Finite element (FE) analysis techniques are used to assess the behavior of the …
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Kontrollierte Darstellung von Blockcopolymeren durch atom transfer radical polymerization (ATRP) und Untersuchungen der Oberflächenmorphologie durch Rasterkraftmikroskopie
… PEO-b-PS and PS-b-PEO-b-PS as well as PEO-b-PHEMA and PHEMA-b-PEO-b-PHEMA block copolymers is presented. The method comprises the preparation of mono- and bifunctional PEO-macroinitiators and their application in the ATRP of styrene and HEMA. Model initiators and monofunctional …
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ADVANCED AAV-MEDIATED LIVER-DIRECTED GENE THERAPIES FOR HAEMOPHILIA A AND MUCOPOLYSACCHARIDOSIS TYPE VI
… manner. I used this approach for haemophilia A (HemA), the most common X-linked bleeding disorder (affecting 1 in 5,000 males), caused by a deficiency of clotting factor 8 (F8, ~7 kb). I first demonstrated the successful full-length reconstitution of the large (~5 kb) and highly active B-domain …
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Rheological Studies of Injectable Thermoresponsive Biodegradable Hydrogels and Porcine Ocular Tissues
… injectable hydrogels [P(NIPAAm-co-DEX-Lactate HEMA) and P(NIPAAm-co-HA-AEMA)], and (ii) biological tissues (porcine ocular tissues). </p> <p>A series of thermoresponsive and biodegradable in situ hydrogel based on N-isopropyacrylamide (NIPAAm) monomer and hydrolytically degradable oligolactate …
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Modification of natural rubber by graft copolymerisation of non-ionogenic hydrophilic monomers in latex
… acrylate (HPA), hydroxyethyl methacrylate (HEMA) and hydroxypropyl methacrylate (HPMA) in NR latex. Initial studies showed that, at low monomer concentrations, the latex stability increased substantially. This was attributed to the rapid adsorption of the monomers on to the surface of …
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After Melancholia: A Reappraisal of Second-Generation Diasporic Subjectivity in the Work of Jhumpa Lahiri
… reading of the three texts constituting the “Hema and Kaushik” trilogy, which also form part 2 of Lahiri’s 2008 collection of short stories, Unaccustomed Earth. Through these three narratives, which all traffic with the dead-mother metaphor, Lahiri can be seen to inscribe the dimension of …
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Hemin Acquisition in Bartonella quintana
… functions as a hemin receptor in <i>E. coli hemA</i> strain EB53. <i>B. quintana hbpA</i> was not able to complement EB53, indicating that it is not a hemin receptor. A functional hemin receptor and coordinate uptake system is encoded by the hemin utilization (<i>hut</i>) locus. <i>B. …
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