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Gene/Protein
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Drug
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Target Concepts:
Gene/Protein
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Query: UMLS:C0276640 (
TEM
)
20,729
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Nanocomposites of Ethylene Vinyl Acetate (
EVA
260) with Cloisite 20A organo clay and Cloisite 20A organo clay impregnated with Fe(CO)(5) were produced in a twin-screw extruder. Dynamic mechanical analysis (DMA) measurements indicated that the moduli increased monotonically for the Cloisite, up to a concentration of 10%, after which the modulus decreased. Adult human dermal fibroblasts (AHDF) were plated on these surfaces and the cell growth was found to be maximal on the nanocomposites containing 10% Cloisite. AHDFs cultured on substrates with higher Cloisite content had low surface area, poor growth curves, and misshaped actin fibers. Compounding
EVA
with Fe(CO)(5) soaked Cloisite did not enhance the modulus even at a loading of 10%.
TEM
images indicate nanoparticles form and coat the Cloisite platelet surfaces, possibly interfering with the exfoliation process. On the other hand, cell culture of MC3T3 osteoblasts proliferated on the Fe containing nanocomposites, the largest effect being observed when cultured in a constant magnetic field. These results indicate how the chemical nature of the Cloisite 20A organo clay can also play a major role. Finally, since natural ECM is fibrillar, these
EVA
nanocomposites were also electrospun into micron thick fibers. MC3T3s proliferated well on these fibers and the MC3T3 proliferation was maximized by culture on electrospun aligned fibers in a constant magnetic field.
...
PMID:The effect of organo clay and adsorbed FeO(3) nanoparticles on cells cultured on Ethylene Vinyl Acetate substrates and fibers. 1883 63
The BCNs were chemically modified using acetic anhydride with the aim of improving its dispersion and interfacial adhesion. Acetylation of BCNs was confirmed by FT-IR spectroscopy. Morphology studies using
TEM
and SEM revealed that a reasonable dispersion of the modified BCNs in the
EVA
matrix was accomplished. The DSC data displayed a little shift in the T
g
to higher temperatures with the incorporation of both modified and unmodified BCNs. Increased thermal stability of the nanocomposites consisting acetylated BCNs was confirmed by TGA technique. DMA measurements highlighted that the storage modulus increased and the damping properties decreased for the nanocomposites with regard to the neat
EVA
.
...
PMID:Influences of modified bacterial cellulose nanofibers (BCNs) on structural, thermophysical, optical, and barrier properties of poly ethylene-co-vinyl acetate (EVA) nanocomposite. 2966 Apr 60
