Buscar
Mostrando ítems 61-70 de 276
Electric field lines: The implications of students' interpretation on their understanding of the concept of electric field and of the superposition principle
(2019 American Association of Physics Teachers., 2019)
A common way to represent an electric field in a course on electricity and magnetism is with the
electric field line diagram. Some literature claims that students have difficulties understanding this
representation and ...
A kinetic description of the free radical polymerization of vinyl acetate in cationic microemulsions
(AMER CHEMICAL SOC, 2000)
Nano- and macroscale structural and mechanical properties of in situ synthesized bacterial cellulose/PEO-b-PPO-b-PEO biocomposites
(Amer Chemical Soc, 2015-02-25)
Highly transparent biocomposite based on bacterial cellulose (BC) mat modified with poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) block copolymer (EPE) were fabricated in situ during biosynthesis of bacterial ...
Biocellulose-based flexible magnetic paper
(Amer Inst Physics, 2015-05-07)
Biocellulose or bacterial cellulose (BC) is a biocompatible (nano) material produced with a three-dimensional network structure composed of microfibrils having nanometric diameters obtained by the Gluconacetobacter xylinus ...
Optical sensor platform based on cellulose nanocrystals (CNC) – 4′-(hexyloxy)-4-biphenylcarbonitrile (HOBC) bi-phase nematic liquid crystal composite films
(2017-07-15)
The preparation of composite materials has gained tremendous attention due to the potential synergy of the combined materials. Here we fabricate novel thermal/electrical responsive photonic composite films combining cellulose ...
Switchable photoluminescence liquid crystal coated bacterial cellulose films with conductive response
(2016-06-05)
Three different low molecular weight nematic liquid crystals (LCs) were used to impregnate bacterial cellulose (BC) film. This simple fabrication pathway allows to obtain highly transparent BC based films. The coating of ...
Growth of magnetic cobalt hexacyanoferrate nanoparticles onto bacterial cellulose nanofibers
(2019-01-01)
Natural polymers templates capable to maneuver the growth and spatial distribution of functional nanoparticles have been furthering the development of a new generation of sustainable and versatile materials. Pure cellulose ...
Upconversion 3D printed composite with multifunctional applications for tissue engineering and photodynamic therapy
(2020-04-01)
Upconversion nanoparticles (UCNPs) are suitable materials for bioapplications due to their ability to emit visible light under near infrared (NIR) excitation, in the biological transparency range. Polycaprolactone(PCL)-based ...
Hydrothermal synthesis of bacterial cellulose-copper oxide nanocomposites and evaluation of their antimicrobial activity
(Elsevier B.V., 2018-01-01)
In this work, for the first time bacterial cellulose (BC) hydrogel membranes were used for the fabrication of antimicrobial cellulosic nanocomposites by hydrothermal deposition of Cu derivative nanoparticles (i.e. Cu(0) ...
Photoswitchable Layer-by-Layer Coatings Based on Photochromic Polynorbornenes Bearing Spiropyran Side Groups
(2018-04-10)
Herein, we present the synthesis of linear photochromic norbornene polymers bearing spiropyran side groups (poly(SP-R)) and their assembly into layer-by-layer (LbL) films on glass substrates when converted to poly(MC-R) ...