Search results for " resin"

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

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…

Cationic lipide mediated transfer of c-abl and bcr antisense oligonucleotides to immature normal myeloid cells: Uptake, biological effects and modula…

1996

Uptake and biochemical and biological effects of antisense oligodeoxynucleotides (ODN) specific for c-abl and bcr genes were studied in normal immature myeloid cells. CD34-positive cells were purified by positive and negative selection and cultured in liquid culture for 7 days. These cells were then incubated with ODNs, either alone or in combination with cationic lipids. The uptake of ODNs was enhanced by the use of cationic lipids. In addition, very low concentrations of ODNs in combination with cationic lipids were capable of specifically inhibiting the expression of the c-abl gene. In contrast, no effects were seen on the expression of bcr. However, despite the effective blocking of c-a…

Bond strength of cemented fiber posts to teeth with simulated internal root resorption

2020

Made available in DSpace on 2021-06-25T10:58:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-03-01 Background: Teeth with internal root resorption (IRR) have guarded prognosis, considering that IRR defect could influence on the post bond strength. The aim of this study was to evaluate the bond strength and the bond interface between different glass fiber-reinforced posts (FRP) after cementation in teeth with simulated internal root resorption (IRR). Material and Methods: Forty-five (45) human premolar roots with simulated IRR were embedded in acrylic resin blocks and cross-sectioned into two segments, enabling them to be re-approximated by screws. Intracanal medication was inserte…

Effects of saliva and nasal secretion on some physical properties of four different resin materials

2009

WOS: 000284036700028