Results 31 to 40 of about 123,753 (242)

Apolar Annonaceous Acetogenins from the Fruit Pulp of Annona muricata

open access: yesMolecules, 2009
A methylene chloride extract of the pulp of Annona muricata L. was fractionated in search for scarcely functionalized Annonaceous acetogenins (type E).
Pierre Champy   +3 more
doaj   +1 more source

Synergistic effects of zinc borate and aluminiumtrihydroxide on flammability behaviour of aerospaceepoxy system [PDF]

open access: yes, 2009
The flame retardancy of mono-component epoxy resin (RTM6), widely used for aerospace composites, treated with zinc borate (ZB), aluminium trihydroxide (ATH) and their mixtures at different concentrations have been investigated by morphological and ...
Camino, Giovanni   +5 more
core   +1 more source

Benzoquinonas, hidroquinonas e sesquiterpenos de Auxemma glazioviana Benzoquinones, hydroquinones and sesquiterpenes of Auxemma glazioviana

open access: yesQuímica Nova, 2005
Two new compounds, 5 and 8, and an epimeric mixture 4a/4b were isolated from hardwood of Auxemma glazioviana. Their structures and relative configurations were determined by modern spectroscopic analysis to be rel-10alpha,11alpha-epoxy-11beta-ethoxy ...
Jose Galberto M. Costa   +5 more
doaj   +1 more source

Molecular Dynamics Study to Predict Thermo-Mechanical Properties of DGEBF/DETDA Epoxy as a Function of Crosslinking Density [PDF]

open access: yes, 2021
Epoxy resins are used extensively in composite materials for a wide range of engineering applications, including structural components of aircraft and spacecraft. The processing of fiber-reinforced epoxy composite structures requires carefully selected heating and cooling cycles to fully cure the resin and form strong crosslinked networks.
arxiv   +1 more source

Fatty Acid Methyl Esters as Biosolvents of Epoxy Resins: A Physicochemical Study [PDF]

open access: yes, 2007
The C8 to C18 fatty acid methyl esters (FAME) have been compared as solvents for two epoxy resin pre-polymers, bisphenol A diglycidyl ether (DGEBA) and triglycidyl paminophenol ether (TGPA).
A. Barton   +21 more
core   +1 more source

Optimization of components in development of polymeric coatings for restoration of transport vehicles

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2018
It is proved, that for improving the performance characteristics of vehicle parts, including their corrosion resistance and wear resistance, it is advisable to use protective polymeric composite coatings.
А.V. Buketov   +10 more
doaj   +1 more source

Insights into the curing kinetics of epoxy/PLA: Implications of the networking structure

open access: yeseXPRESS Polymer Letters, 2020
The curing kinetics of thermoset-thermoplastic compounds based on diglycidyl ether of bisphenol A (DGEBA), methyl tetrahydrophthalic anhydride (MTHPA) as the hardener, 2,4,6-tris(dimethylaminomethyl)phenol (DEH 35) as a catalyzer, and poly(lactic acid ...
I. D. S. Silva   +5 more
doaj   +1 more source

1H NMR Study of the In Vitro Digestion of Highly Oxidized Soybean Oil and the Effect of the Presence of Ovalbumin

open access: yesFoods, 2021
Oxidized lipids containing a wide variety of potentially toxic compounds can be ingested through diet. However, their transformations during digestion are little known, despite this knowledge being essential in understanding their impact on human health.
Ana S. Martin-Rubio   +3 more
doaj   +1 more source

Microfabricated sensor platform with through-glass vias for bidirectional 3-omega thermal characterization of solid and liquid samples [PDF]

open access: yesSensors and Actuators A: Physical 278, 33-43, 2018, 2018
A novel microfabricated, all-electrical measurement platform is presented for a direct, accurate and rapid determination of the thermal conductivity and diffusivity of liquid and solid materials. The measurement approach is based on the bidirectional 3-omega method. The platform is composed of glass substrates on which sensor structures and a very thin
arxiv   +1 more source

Synthesis and conformations of [2.n]metacyclophan-1-ene epoxides and their conversion to [n.1]metacyclophanes [PDF]

open access: yes, 2017
A series of syn- and anti-[2.n]metacyclophan-1-enes have been prepared in good yields by McMurry cyclizations of 1,n-bis(5-tert-butyl-3-formyl-2-methoxyphenyl)alkanes.
Akther, Thamina   +7 more
core   +1 more source

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