Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 24
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
Adulterants interference on Fourier Transform Infrared analysis of raw milk Arq. Bras. Med. Vet. Zootec.
Ribeiro,D.C.S.Z.; Tavares,W.L.F.; Leite,M.O.; Cerqueira,M.O.P.; Lima,J.S.; Ferreira,L.F.; Feijó,F.A.C.; Haddad,J.P.; Fonseca,L.M..
RESUMO O objetivo deste trabalho foi analisar as leituras de composição do leite cru por meio de espectrofotometria FTIR, utilizando-se curva de regressão PLS, bem como as contagens de células somáticas e bacteriana total por citometria de fluxo, após adição de amido e sacarose. O leite cru foi adulterado com três concentrações de amido e sacarose (0,1%, 0,5% e 1%), colocado em frascos contendo bronopol ou azidiol, os quais foram armazenados em duas temperaturas (7±2°C e 25±2°C ). As análises foram realizadas após zero, três, 24, 48, 72 e 168 horas de armazenamento. O modelo de regressão linear múltipla foi utilizado para análise estatística. A adição de amido e sacarose resultou em mudança significativa (P<0,05) para todas as variáveis dependentes. O...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Raw milk; FTIR; Startch; Sucrose; Composition analysis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501649
Imagem não selecionada

Imprime registro no formato completo
Fourier Transform Infrared Spectroscopy (FTIR) for MUN analysis in normal and adulterated Milk Arq. Bras. Med. Vet. Zootec.
Oliveira,M.C.P.P.; Silva,N.M.A.; Bastos,L.P.F.; Fonseca,L.M.; Cerqueira,M.M.O.P.; Leite,M.O.; Conrrado,R.S..
The objective of this study was to evaluate the CombiScope FTIR equipment based on Fourier Transform Infrared methodology (FTIR), to assess the content of milk urea nitrogen (MUN) in Brazil. Repeatability and reproducibility of CombiScopeTM FTIR (Delta Instruments), and comparison with an enzymatic automated method (Chemspec® 150; Bentley Instruments) were tested to measure raw milk urea nitrogen (MUN). Additionally, MUN levels stability after storage of raw milk samples at 4ºC, and 20ºC for up to 15 days, and capability and precision to detect extraneous urea added as an adulterant to the milk were evaluated by FTIR equipment. There was a high correlation coefficient for the analysis of MUN by FTIR equipment, when compared with the automated enzymatic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk; Validation; Milk urea nitrogen; Infrared spectroscopy; FTIR.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000500037
Imagem não selecionada

Imprime registro no formato completo
Vibrational and thermal characterization of seeds, pulp, leaves and seed oil of Rosa rubiginosa Boletín de la Sociedad
Ramos,Pablo Martín; Gil,Jesús Martín; Ramos Sánchez,M. Carmen; Navas Gracia,Luis Manuel; Hernández Navarro,Salvador; Martín Gil,Francisco Javier.
Rosa rubiginosa L. seed oil has been studied for its application in skin care products, but the chemical nature of seeds, pulp and even leaves, apart from that of oil, is also relevant with a view to the application of this weed for biodiesel production. All these vegetal materials were studied by infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) for characterisation purposes. FTIR bands at 3005, 2924, 1740, 1654 and 1456 cm-1 were used to estimate the iodine index, suitable for biofuels, and the oxidation stability degree. From the viewpoint of the thermal stability, both the seed oil (for which pyrolysis occurs at 462ºC), the raw seeds and the rosehip pulp (with decomposition temperatures of 373ºC and 333ºC, respectively) showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: A-linolenic acid; DSC; FTIR; Rose hip seed oil; R. rubiginosa.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722016000300003
Imagem não selecionada

Imprime registro no formato completo
Exploring the Anticancer Activity of Grape Seed Extract on Skin Cancer Cell Lines A431 BABT
Mohansrinivasan,V.; Devi C.,Subathra; Deori,Meenakshi; Biswas,Ananya; Naine S,Jemimah.
In this study, grape seeds were extracted using ethyl acetate and petroleum ether by solvent-solvent extraction method. The phytochemical tests were performed to identify different phytochemical compounds present in the grape seed extract (GSE). Antibacterial activity of the GSE was determined using agar diffusion method against Gram- positive and Gram-negative bacteria. Gas chromatography-mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FTIR) analysis was done to identify the presence of bioactive compounds and their functional groups. The GC-MS results revealed a total of four compounds, known to have potent activity against cancer cells, viz, squalene, the most potent compound found in ethyl acetate extract and diethyl phthalate,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: GSE (Grape seed extract); Phytochemical; FTIR; GCMS; Skin cancer cell line; Anticancer agents.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000400540
Imagem não selecionada

Imprime registro no formato completo
Multivariate analysis of the spectroscopic profile of the sugar fraction of apple pomace BABT
Gabriel,Luciana Sutil; Prestes,Rosilene Aparecida; Pinheiro,Luís Antonio; Barison,Andersson; Wosiacki,Gilvan.
Pomace, the main by-product of apple juice processing, contains all the fruit's compounds such as minerals, sugars, fibers, enzymes and secondary metabolites after bioprocessing. Dried pomace from four apple varieties (Gala, Fuji, Catarina and Joaquina) was used to extract fructose, glucose, and sucrose, the main soluble sugars contained in apple pomace, to verify the possible use of the sugar fractions. The concentrated sugars were characterized by NMR and FTIR. The partial least squares method (PLS) applied to the NMR and FTIR spectra revealed large amounts of fructose, glucose, and sucrose, without the presence of others compounds. Principal component analysis (PCA) discriminated the studied apple varieties, with a 99% level of significance, as function...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apple pomace; NMR; FTIR; Multivariate analysis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000300012
Imagem não selecionada

Imprime registro no formato completo
Characterization of tropical starches modified with potassium permanganate and lactic acid BABT
Takizawa,Fabiano Franco; Silva,Graziela de Oliveira da; Konkel,Francisco Eneias; Demiate,Ivo Mottin.
In the present work some tropical starches were modified by an oxidative chemical treatment with potassium permanganate and lactic acid. The native and modified samples were evaluated by mid-infrared spectroscopy, differential dyeing, pH, expansion power, solubility and swelling power, clarity of the pastes, susceptibility to syneresis, carboxyl content and reducing power. All modified samples presented dark blue color, higher expansion power (except corn starch), carboxyl content and reducing power. The solubility of the modified starch granules was very high at 90ºC. At this temperature, it was not possible to measure their swelling power. The viscographic analysis showed decrease in peak viscosity and higher degree of cooking instability. The principal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropical starches; Oxidized starches; FTIR.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600012
Imagem não selecionada

Imprime registro no formato completo
Optimization of Parameters for Biosynthesis of Silver Nanoparticles Using Leaf Extract of Aegle marmelos BABT
Christopher,JohnSamuel Godwin; Saswati,Banerjee; Ezilrani,PanneerSelvam.
ABSTRACTThe aim of this study was to optimize the biosynthesis of silver nanoparticles using leaves ofAegle marmelos as the primary source. The optimal reaction medium comprised 2:1 concentration of leaf extract and 6mM concentration of silver nitrate solution (pH 7. The biosynthesized silver nanoparticles were confirmed by UV-Vis spectroscopy at 420 nm, XRD and FTIR analysis. The antimicrobial properties of silver nanoparticles were confirmed withBacillus subtilis andPseudomonas aeruginosa.
Tipo: Info:eu-repo/semantics/article Palavras-chave: AgNO3; Aegle marmelos leaf; UV-Vis spectroscopy; XRD; FTIR.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000500702
Imagem não selecionada

Imprime registro no formato completo
Separation of polyhydroxyalkanoates-producing bacterial strains using PHA synthase gene and their evaluation for PHA deposition BABT
Khan,Abdul Basit; Khattak,Mehmood Iqbal; Tarar,Omer Mukhtar; Habib,Farzana; Jamil,Khalid; Yasmin,Arfa; Parvez,Shoukat.
In this study, a variety of samples were screened for the presence of PHA synthase gene. Results showed that 16 out of 102 isolated were positive for PHA respective genes. The highest prevalence was observed in Pseudomonas aeruginosa. The capability of PHA production was also shown by growing these strains on the defined medium and subsequent analysis using intracellular granules staining and Fourier transform infrared spectroscopy (FT-IR). The microscopic analysis showed that the positive strains accumulated PHA in the cell. The FT-IR analysis showed the presence of PHA peaks in the dried cells as well as in extraction product. P aeruginosa strain P7 showed higher concentration of PHA compared to the others as demonstrated by the highest respective peaks...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polyhydroxyalkanoates; Biodegradable polymers; PHA synthase gene; FTIR.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400015
Imagem não selecionada

Imprime registro no formato completo
Biodegradation of erythrosin B dye by paramorphic Neurospora crassa 74A BABT
Jesus,Gisele Jane de; Corso,Carlos Renato; Campos,Adriana de; Franchetti,Sandra Mara Martins.
The present work used paramorphic forms of Neurospora crassa 74A to remove erythrosine. The fungus culture was grown in medium containing the dye, as only carbon source for 2 and 90 h of interaction. A washing process using distilled water isolated the cellular mass mycelia was dried for 12 h at 105ºC and transformed in fine powder and analyzed in FTIR. The supernatant was analyzed through spectrophotometer UV-Vis and FTIR. Significant differences in the spectrum of UV-VIS and FTIR were observed between the control and the supernatant and between wall control and the walls colored by red, in FTIR for 2 and 90 h. Some significant bands were modified, suggesting the possibility of enzymatic biodegradation in proportion to the time of contact between the dye...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodegradation; FTIR; Neurospora crassa; Paramorphic; Erythrosin.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200028
Imagem não selecionada

Imprime registro no formato completo
Bioflocculant production from Streptomyces platensis and its potential for river and waste water treatment BJM
Agunbiade,Mayowa; Pohl,Carolina; Ashafa,Omotayo.
ABSTRACT A bacterium isolated from Sterkfontein dam was confirmed to produce bioflocculant with excellent flocculation activity. The 16S rDNA nucleotide sequence analyses revealed the bacteria to have 99% similarity to Streptomyces platensis strain HBUM174787 and the sequence was deposited in the Genbank as Streptomyces platensis with accession number FJ 486385.1. Culture conditions for optimal production of the bioflocculant included glucose as a sole carbon source, resulting in flocculating activity of 90%. Other optimal conditions included: peptone as nitrogen source; presence of Mg2+ as cations and inoculum size of 1.0% (v/v) at neutral pH of 7. Optimum dose of the purified bioflocculant for the clarification of 4 g/L kaolin clay suspension at neutral...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Culture conditions Polysaccharide Flocculating activity Kaolin suspension EDX &amp; FTIR.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400731
Imagem não selecionada

Imprime registro no formato completo
Variation analysis of bacterial polyhydroxyalkanoates production using saturated and unsaturated hydrocarbons BJM
Tufail,Saiqa; Munir,Sajida; Jamil,Nazia.
ABSTRACT Polyhydroxyalkanoates (PHA) are efficient, renewable and environment friendly polymeric esters. These polymers are synthesized by a variety of microbes under stress conditions. This study was carried out to check the suitability of waste frying oil in comparison to other oils for economical bioplastic production. Six bacterial strains were isolated and identified as Bacillus cereus (KF270349), Klebsiella pneumoniae (KF270350), Bacillus subtilis (KF270351), Brevibacterium halotolerance (KF270352), Pseudomonas aeruginosa (KF270353), and Stenotrophomonas rhizoposid (KF270354) by ribotyping. All strains were PHA producers so were selected for PHA synthesis using four different carbon sources, i.e., waste frying oil, canola oil, diesel and glucose....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Waste frying oil; Polyhydroxyalkanoates; Fluorescence microscopy; FTIR.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400629
Imagem não selecionada

Imprime registro no formato completo
Effects of enzymatic hydrolysis (Flavourzyme®) assisted by ultrasound in the structural and functional properties of hydrolyzates from different bovine collagens Ciênc. Tecnol. Aliment.
VIDAL,Alessandra Roseline; FERREIRA,Thaísa Egiéli; MELLO,Renius de Oliveira; SCHMIDT,Michele Mantelli; KUBOTA,Ernesto Hashime; DEMIATE,Ivo Mottin; ZIELINSKI,Acácio Antonio Ferreira; DORNELLES,Rosa Cristina Prestes.
Abstract This study aimed at evaluating the functional (antioxidant and antimicrobial activity) and structural properties of different bovine collagen hydrolysates obtained through ultrasound assisted enzymatic hydrolysis (Flavourzyme®). The use of previous or simultaneous ultrasound strengthened the enzymatic hydrolysis of bovine collagen samples, generating higher number of bands in wave number (cm-1). The best treatment was the enzymatic hydrolysis, while for the powder fiber and hydrolysate, it was the ultrasound hydrolysis. The sample that showed the highest inhibiting action to the gram-negative bacteria Salmonella choleraesuis growth and gram-positive bacteria Staphylococcus aureus hydrolyzed with enzyme and simultaneous ultrasound. Therefore, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant activity; Antimicrobial activity; FTIR; Hydrolysis degree; Ultrasound.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500103
Imagem não selecionada

Imprime registro no formato completo
Extraction of β-glucan from Saccharomyces cerevisiae: Comparison of different extraction methods and in vivo assessment of immunomodulatory effect in mice Ciênc. Tecnol. Aliment.
PENGKUMSRI,Noppawat; SIVAMARUTHI,Bhagavathi Sundaram; SIRILUN,Sasithorn; PEERAJAN,Sartjin; KESIKA,Periyanaina; CHAIYASUT,Khontaros; CHAIYASUT,Chaiyavat.
Abstract Beta-glucan (BG) is a conserved cell wall components of bacteria, fungi, and yeast. BG is an immunomodulator and stimulates the host immune system. This study was performed to screen Saccharomyces cerevisiae strain with high BG, extraction of BG using different chemical extraction methods, composition analysis of BG, and evaluation of the immunomodulatory effect of high-quality BG using mice model. Ten yeast strains were screened for high BG content using total glucan extraction kit and were subjected to FT-IR analysis. The kit based extraction revealed that HII31 showed a high content of total glucan and BG. HII31 cells were subjected to four different acid/base extractions, which indicated that combination of a strong base (NaOH) and weak acid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beta-glucan; Saccharomyces cerevisiae; Immunomodulation; FTIR; Cytokines.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000100124
Imagem não selecionada

Imprime registro no formato completo
Characterization of hydrolysates of collagen from mechanically separated chicken meat residue Ciênc. Tecnol. Aliment.
SCHMIDT,Michele Mantelli; FONTOURA,Andrine Menna da; VIDAL,Alessandra Roseline; DORNELLES,Rosa Cristina Prestes; KUBOTA,Ernesto Hashime; MELLO,Renius de Oliveira; CANSIAN,Rogério Luis; DEMIATE,Ivo Mottin; OLIVEIRA,Cristina Soltovski de.
Abstract Obtaining collagen and hydrolysates from mechanically separated chicken meat residue is an excellent way to add value to this waste. The aims of this study were to obtain collagen hydrolysates from chicken MSM residue using Alcalase® and Flavourzyme® enzymes, as well characterizing the functional, structural and thermal stability properties. The highest degree of hydrolysis was obtained using Alcalase®, 36.11%, while using Flavourzyme® resulted in 12.02%. The DSC analysis of the collagen indicated a denaturation temperature of 46.47 °C. The FTIR spectra of the crude collagen showed absorption peaks that were characteristic of amide bands A, B, I, II and III. In the spectra of the hydrolysed the area of ​​the amide bands was reduced, and some peaks...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alcalase®; Electrophoresis; Flavourzyme®; FTIR; Functional properties.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020005006203
Imagem não selecionada

Imprime registro no formato completo
Análise exploratória de adoçantes de mesa via espectroscopia no infravermelho (FTIR) e análise por componentes principais (ACP) Ciênc. Tecnol. Aliment.
Tozetto,Adriana; Demiate,Ivo Mottin; Nagata,Noemi.
Nos últimos vinte anos, o consumo de alimentos diet e light tem aumentado sistematicamente, o que tem propiciado o constante desenvolvimento de produtos desse gênero. Grande ênfase tem sido dada àqueles produtos que substituem sacarose por edulcorantes de baixos conteúdos calóricos ou não calóricos. Seguindo esta tendência, adoçantes de mesa têm sido desenvolvidos variando-se amplamente o veículo e o tipo de edulcorante empregado. Neste trabalho, a análise de componentes principais associada à espectroscopia na região do infravermelho médio foi utilizada com sucesso para diferenciar os veículos empregados na produção destes adoçantes, sendo que esta metodologia quimiométrica reduziu o espaço dimensional para dois fatores, explicando cerca de 82-% da...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adoçantes; Quimiometria; PCA; FTIR.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612007000400008
Imagem não selecionada

Imprime registro no formato completo
The use of chitosan in protecting wooden artifacts from damage by mold fungi Electron. J. Biotechnol.
El-Gamal,Rehab; Nikolaivits,Efstratios; Zervakis,Georgios I; Abdel-Maksoud,Gomaa; Topakas,Evangelos; Christakopoulos,Paul.
Background: Many buildings in Egypt e.g. museums, mosques and churches, do not possess controlled environments for minimizing the risks of damage of wooden artifacts due to the growth of fungi. Fungal damage usually appears as change in wood color, appearance of stains, and sometimes deformation of wooden surfaces. In this study we focused on the effect that some fungi exert on the properties of wooden artifacts and evaluated the effectiveness of different concentrations of chitosan on their protection against damage by mold fungi. Results: Samples were collected from different monuments and environments, and fungi growing on them were isolated and identified. The isolated Penicillium chrysogenum, Aspergillus flavus and /Aspergillus niger strains were used...
Tipo: Journal article Palavras-chave: Archeological wood; Chitosan protection; Crystallinity index; Damage of wooden artifacts; Filamentous fungi; FTIR; Fungal damage; Prevention of fungal growth; UV spectrophotometry; Wood deterioration; XRD.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000600011
Imagem não selecionada

Imprime registro no formato completo
Caracterização estrutural e avaliação da eficiência de filtragem de velas cerâmicas porosas modificadas. Infoteca-e
ALES, C. R.; ASSIS, O. B. G..
Neste trabalho são apresentados os resultados parciais da alteração de velas comerciais pelo revestimento de SiO2 seguindo de tratamentos de hidrofilização e do depósito de enzimas. Caracteriza-se as superfícies filtrantes por técnicas microscópica de varredura eletrônica (MEV), e espectroscópicas de energia dispersiva de raios-X (EDX) e infravermelho com transformada de Fourier (FTIR) bem como, testes para avaliação da eficiência do sistema de filtragem em fluxo contínuo.
Tipo: Folhetos Palavras-chave: Microscopia de Varredura Eletrônica; MEV; Raio-X; EDX; FTIR.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/29481
Imagem não selecionada

Imprime registro no formato completo
The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition ArchiMer
Gurdebeke, Pieter R.; Mertens, Kenneth; Takano, Yoshihito; Yamaguchi, Aika; Bogus, Kara; Dunthorn, Micah; Matsuoka, Kazumi; Vrielinck, Henk; Louwye, Stephen.
Species in the genera Hexasterias and Halodinium have been recorded over the last decades as acritarchs in palynological and/or plankton studies. In paleoenvironmental studies, these resting stages are often interpreted as indicators of freshwater input. The biological affinity of these genera has never been definitely established. Here, a new species, Halodinium verrucatum sp. nov., is described and molecular evidence (single specimen SSU and LSU rDNA sequencing) reveals that both this new species and Hexasterias problematica, collected from sediment samples in the Skagerrak and Baltic Sea, are resting stages of prorodontid ciliates. Additionally, infrared spectroscopic analysis (micro-FTIR) of Hexasterias problematica and Halodinium spp. specimens...
Tipo: Text Palavras-chave: Acritarch; Ciliate cyst; FTIR; LSU-SSU rDNA; Prostomatida; Taxonomy.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00468/57970/64186.pdf
Imagem não selecionada

Imprime registro no formato completo
Taxonomic Re-Investigation and Geochemical Characterization of Reid’s (1974) Species of Spiniferites from Holotype and Topotype Material ArchiMer
Gurdebeke, Pieter R.; Mertens, Kenneth; Bogus, Kara; Marret, Fabienne; Chomerat, Nicolas; Vrielinck, Henk; Louwye, Stephen.
The genus Spiniferites currently encompasses 142 dinoflagellate cyst species. Some Spiniferites species are difficult to identify because of an incomplete or doubtful description, and/or substandard iconography. This study re-describes and re-illustrates the Spiniferites holotypes first described by Reid in 1974 Reid PC. 1974. Gonyaulacacean dinoflagellate cysts from the British Isles. Nova Hedwigia. 25:579–637. [Google Scholar]. It also discusses topotype material from surface sediments recovered from British estuaries, and attempts to provide further constraints on the classification of species in this genus using the geochemical characterization of their cyst walls. Reid described four new Spiniferites species: Spiniferites belerius, Spiniferites...
Tipo: Text Palavras-chave: Dinoflagellate cyst; Redescription; Taxonomy; Geochemistry; Cyst wall composition; FTIR; Dinosporin.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00471/58306/60847.pdf
Imagem não selecionada

Imprime registro no formato completo
Degradation of rubber to metals bonds during its cathodic delamination, validation of an artificial ageing test ArchiMer
Nakache, Maryline; Aragon, Emmanuel; Belec, Lenaik; Perrin, Francois-xavier; Roux, Gerard; Le Gac, Pierre-yves.
Rubber-metal assemblies used for submarine applications are often associated to cathodic protection which can lead to cathodic disboncling of the polymer/metal interface. The degradation mechanisms of polychloroprene/epoxy adhesive/copper-aluminium substrate systems associated to an accelerated ageing test are compared to the degradations resulting from natural ageing conditions in the Mediterranean sea. From destructives tests, a kinetic in four steps is identified for both ageing conditions. This kinetic is confirmed by Electrochemical Impedance Spectroscopy data during ageing. In order to further identify the failure mode, the disbondecl surfaces on polymer and steel sides are analyzed using SEM and FTIR. Both ageing conditions present the same type of...
Tipo: Text Palavras-chave: Ageing; Rubber to metal systems; Cathodic delamination; FTIR.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00056/16697/14370.pdf
Registros recuperados: 24
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional