Search results for "resin"
showing 10 items of 385 documents
Influence of Polymer Electrospun Nanofibers on Thermal Properties of Epoxy Resins
2019
Electrospinning of polymers has gained surging interest in the last decades due to its wide range of applications in different fields, such as sensors, electronic devices, separation systems, biomedical materials. Still there are only few reports on the use of these nanofibers as reinforcement in polymer composites. In this paper, solution electrospinning was employed to produce nanofibrous mats impregnating two epoxy resins to form “monolayer“ systems, with the aim to study the influence of the nanofibers on both the curing behaviour and the morphology of the resin systems. Three polymers were chosen for producing electrospun mats, a polysulfone (PSF), a polyamide Nylon 6,6 (Ny66) and a po…
EPOXY RESIN SYSTEMS CURABLE BY HIGH ENERGY RADIATION FOR ADVANCED COMPOSITES. STUDY OF THE EFFECTS OF PROCESS TEMPERATURE ON THERMAL PROPERTIES
2006
EPOXY RESIN VS BIOCERAMIC: SYSTEMATIC REVIEW WITH META-ANALYSIS
2021
Molecular insights into shellac film coats from different aqueous shellac salt solutions and effect on disintegration of enteric-coated soft gelatin …
2014
The purpose of this investigation was to study the effect of using different salts of shellac on the disintegration properties of shellac-based enteric coatings. In the last two decades, shellac has been increasingly used as an aqueous solution for enteric coating purposes, with the ammonium salt being the form typically used. Little investigation has been performed on using other salts, and therefore, this was the focus of our work. Enteric coatings, based on different shellac salts (ammonium, sodium, potassium and composite ammonium-sodium), were applied onto soft gelatin capsules. Disintegration testing of the coated soft gelatin capsules showed that alkali metal salts promote faster dis…
Radiation Curing of Thermosetting- Thermoplastic Blends as Matrices for Structural Carbon Fibre Composites
2011
Physicochemical Surface Properties of Various Intraocular Lenses
2001
<i>Purpose:</i> It is of major interest to understand how intraocular lens (IOL) surfaces interact with aqueous humor or tissues after implantation. Important parameters to describe the physicochemical surface properties are the contact angle and critical surface tension. Therefore, we performed measurements of the contact angle and critical surface tension of several commercially available IOLs. <i>Setting:</i> Department of Ophthalmology, Johannes Gutenberg University, Mainz, University Eye Hospital, Tübingen, and Max Planck Institute for Polymer Research, Mainz, Germany. <i>Methods:</i> A total of 17 commercially available standard quality IOL types (6…
Eficacia de la resincronización cardiaca en el tratamiento de la insuficiencia cardiaca sintomática: metaanálisis y análisis económico
2014
La insuficiencia cardiaca es un síndrome clínico crónico, causado por alteraciones funcionales del corazón, generalmente del ventrículo izquierdo (VI). Es un importante problema de salud, con unas elevadas morbilidad y mortalidad. Es una de las enfermedades cardiovasculares que causa más invalidez, más mortalidad y mayor gasto en los países de nuestro entorno, a pesar de los recientes avances en su tratamiento. La terapia de resincronización cardiaca es una opción terapéutica en estos enfermos. Se trata de un marcapasos tricameral, con electrodos localizados en aurícula derecha, ventrículo derecho y en cara lateral de ventrículo izquierdo. Logra corregir la asincronía electromecánica ventri…
Estudio experimental in vitro de la unión de dos compuestos híbridos a distintos cementos de resina compuesta
2019
La actual exigencia de máxima conservación de tejido dental sano ha potenciado el uso de restauraciones prostodóncicas parciales frente a las de recubrimiento total. La ausencia de retención mecánica obliga a un cementado adhesivo de dichas restauraciones sobre los dientes. En los últimos años han surgido nuevos materiales, como los compuestos híbridos con intención de mejorar las propiedades mecánicas y estéticas de los materiales utilizados hasta el momento como son las porcelanas y las resinas compuestas. Se presenta una revisión bibliográfica de los materiales sometidos a este estudio: cerámicas dentales, resinas compuestas, cementos de resina compuesta y materiales híbridos. El objetiv…
Availability of extractives from various Norway spruce (Picea abies) stumps assortments
2022
Stumps and knotwood of Norway spruce (Picea abies) are valuable sources of wood extractives. Although lignans from knotwood have already been utilized in value-added products, the behavior and valorization of stump-derived extractives are less studied. In this study, the composition of lipophilic and hydrophilic extractives, particularly lignans, from various spruce stump samples (stump bottom, stump heart, and crushed stump samples) stored outside were studied. Lipophilic and hydrophilic extracts were separated with an accelerated solvent extraction (ASE) apparatus using n-hexane and hot water, respectively. The detailed extractives content of samples was then determined by gas chromatogra…
Takarazuka teātra ietekme uz krosdresinga attēlojumiem Japānas populārajā kultūrā
2016
Bakalaura darbā „Takarazuka teātra ietekme uz krosdresinga attēlojumiem Japānas populārajā kultūrā” tiek pētīts, kā Takarazuka Revue teātra ietekmes un iespaida rezultātā tiek attēlots krosdresingsJapānas populārajā kultūrā un kā krosdresinga attēlojums ir mainījies laika gaitā. Darba mērķi ir: uzrādīt krosdresinga piemērus Japānā no vēsturiskā skatupunkta un definēt tā nozīmi sabiedrībā, parādīt Takarazuka teātra krosdresinga īpatnības, kā arī noskaidrot, kā Takarazuka teātra darbība ir ietekmējusi krosdresinga tematikas piemērus dažādos Japānas populārās kultūras mēdijos. Tika secināts, ka Takarazuka teātris ir izveidojis Japānas sieviešu pārģērbšanās, jeb krosdresinga klasiku, uz kuras p…