Results 91 to 100 of about 3,577 (170)

Synthesis and morphological characterization of nanocomposite based on anodic TiO2 nanotubes and poly(N-maleoyl Glycine-CO-Acrylic acid) [PDF]

, 2017
Indexación: Scopus.In this study, we examined the synthesis, and characterization of TiO2/poly(N-maleoylglycine-co-acrylic acid) (TiO2/poly(MG-co-AA)) nanocomposite.
Arratia-Perez, R., Asenjo, A., Martin-Trasanco, R., Oyarzún, D.P., Pizarro, G.D.C., Sánchez, J., Tello, A., Zúñiga, C.   +7 more
core   +1 more source

Infrared Spectroscopy Applied to Materials Used as Thermal Insulation and Coatings

Journal of Aerospace Technology and Management, 2013
http://dx.doi.org/10.5028/jatm.v5i4.265 It is very important to control the characteristics of a polymer used in rubber compositions and paints in aerospace applications.
Natália Beck Sanches, Ricardo Pedro, Milton Faria Diniz, Elizabeth da Costa Mattos, Silvana Navarro Cassu, Rita de Cássia Lazzarini Dutra   +5 more
doaj  

Quantification of elastomers in CR/NR/BR blends [PDF]

Polímeros
Using ternary blends is a technological solution to combine the best characteristics of different elastomers. Quantifying rubbers in a blend, in which each content influences the result, is a task complex and usually requires the coupling of techniques ...
Taynara Alves de Carvalho, Alexandra Helena de Barros, Rachel Farias Magalhães, Milton Faria Diniz, Lídia Mattos Silva Murakami, Jorge Carlos Narciso Dutra, Natália Beck Sanches, Rita de Cássia Lazzarini Dutra   +7 more
doaj   +1 more source

Influence of the degree of hydrolysis of poly(vinyl alcohol) on the physical properties of films based on blends of gelatin and poly(vinyl alcohol) plasticized with glycerol [PDF]

, 2008
O objetivo deste trabalho foi o estudo do efeito do Grau de Hidrólise (GH) do poli(vinil álcool) (PVA) nas propriedades dos filmes à base de blendas de gelatina suína e PVA com dois GH.
BERGO, Paulo Victor de Albuquerque, CARVALHO, Rosemary Aparecida de, HABITANTE, Ana Mônica Quinta Barbosa, MORAES, Izabel Cristina, SILVA, Gabriela Ghizi Damasceno da, SOBRAL, Paulo José do Amaral   +5 more
core   +2 more sources

Leveraging Prior Knowledge in Semi-Supervised Learning for Precise Target Recognition

Remote Sensing
Underwater acoustic target recognition (UATR) is challenged by complex marine noise, scarce labeled data, and inadequate multi-scale feature extraction in conventional methods.
Guohao Xie, Zhe Chen, Yaan Li, Mingsong Chen, Feng Chen, Yuxin Zhang, Hongyan Jiang, Hongbing Qiu   +7 more
doaj   +1 more source

Low Temperature Post Radiation Polymerization of Tetrafluoroethylene in the Presence of the Graphene 3D Material [PDF]

, 2013
It was found that irradiation by γ-rays at the liquid nitrogen temperature of a mixture of C2F4 with the grapheme 3D material obtained by explosive exfoliation of graphite oxide gives a composite in which the concentration of polytetrafluoroethylene is ...
Baskakov, S.A., Kichigina, G.A., Kiryukhin, D.P., Kushch, P.P., Michtchenko, A., Shulga, Y.M.   +5 more
core  

Quantification of Aerospace Polymer Blends by Thermogravimetric Analysis and Infrared Spectrometry

Journal of Aerospace Technology and Management, 2019
Ethylene-propylene-diene elastomer (EPDM) is employed as thermal insulation for rocket motors, as well as EPDM blends with ethylene vinyl acetate (EVA) have been used in the aerospace industry.
Paulo Santos Rigoli, Lídia Mattos Silva Murakami, Milton Faria Diniz, Margarete Ferreira Prata Azevedo, Silvana Navarro Cassu, Elizabeth da Costa Mattos, Rita de Cássia Lazzarini Dutra   +6 more
doaj   +3 more sources

Quantificação por NIR/MIR de resina poliuretânica em misturas binárias com nitrocelulose utilizadas em tintas

Polímeros, 2014
Foi elaborada uma nova metodologia nas regiões do infravermelho médio (MIR) e do infravermelho próximo (NIR), usando-se técnicas de Reflexão e/ou Transmissão para a determinação do teor de resina poliuretânica (PU) em misturas binárias com nitrocelulose (
Viviane Cristine Rodrigues, Rita de Cássia Lazzarini Dutra, Milton Faria Diniz, Elizabeth da Costa Mattos   +3 more
doaj   +1 more source

Fucose-Containing Sulfated Polysaccharides from Brown Seaweeds Inhibit Proliferation of Melanoma Cells and Induce Apoptosis by Activation of Caspase-3 in Vitro [PDF]

, 2011
Fucose-containing sulfated polysaccharides (FCSPs) extracted from seaweeds, especially brown macro-algae, are known to possess essential bioactive properties, notably growth inhibitory effects on tumor cells.
Ale, Marcel Tutor, Maruyama, Hiroko, Tamauchi, Hidekazu, Mikkelsen, Jørn Dalgaard, Meyer, Anne S.   +4 more
core   +1 more source

Validation of the Method for Determining Caffeine Content in Green Tea with FTIR UATR

INDONESIAN JOURNAL OF CHEMICAL RESEARCH
The FTIR UATR method for quantifying caffeine in green tea samples was validated. ATR (Attenuated Total Reflectance) , a technique for direct analysis without sample preparation, was employed. Caffeine was determined at peak absorption between 1600 and 1700 cm-1.
openaire   +2 more sources