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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
05/11/2014 |
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Data da última atualização: |
05/11/2014 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
MAIA, O. M. de A.; SCHNEIDER, F. K.; MAIA, J. M.; NEVES, L. C.; PENTEADO, S. do R. C. |
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Afiliação: |
Ozana Maria de Andrade Maia, UTFPR; Fabio Kurt Schneider, UTFPR; Joaquim Miguel Maia, UTFPR; Larissa Comar Neves, UTFPR; SUSETE DO ROCIO CHIARELLO PENTEADO, CNPF. |
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Título: |
Wood characterization using the power spectral density and phase velocity of ultrasonic signals. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: INTERNATIONAL ULTRASONICS SYMPOSIUM, 2014, Chicago. Proceedings. [S.l.]: IEEE, 2014. |
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Páginas: |
p. 1416-1419. |
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Descrição Física: |
Disponibilizado online. |
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Idioma: |
Inglês |
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Conteúdo: |
The application of non-destructive testing (NDT) in the analysis of trees in forest plantations permits the evaluation of the wood quality, the internal defects in development or pest attack and its characterization for application as solid wood and its products. These techniques have been constantly improved with the use of computers, electronics and agricultural control levels in order to provide tools to the specialists in integrated management. The ultrasound has been used in agriculture as NDT to determine the elasticity modulus of juvenile and mature wood of pinus and other species. This study aimed to the evaluation of new techniques for characterization of wood using parameters such as the power spectral density (PSD) and phase velocity of ultrasonic signals propagating in wood. The tests were performed using a pair of ultrasonic transducers with central frequency of 50 kHz (083-067-038, GE) which were connected to an ultrasonic pulser/receiver (5077PR, Olympus). The transmitting transducer was coupled to the samples of pinus using ultrasound gel and excited with negative pulses of short duration (5 μs) and high amplitude (-400 V) to generate longitudinal and shear waves. The ultrasound signals that propagated through the samples were received by the receiving transducer, amplified (20 to 40 dB), acquired in a digital scope (MSO4104B, Tektronix) and then transferred to a microcomputer. The tests have been done with 10 reference samples (healthy) and 10 attacked by wood wasps, with small holes in the bark. The transducers were placed on the samples in the axial, radial and inclined modes. The data were processed using the Matlab (Mathworks Inc.) to determine the power spectral density (PSD), the root mean square deviation index (cRMSDdB) and the phase velocity between the reference and attacked samples. The cRMSDdB calculated between the PSD of the reference and the attacked samples were generally higher for samples with higher degree of damage, however, in some cases, they were lower due to the presence of wood knots. The phase velocities were calculated in the frequency range 1-200 kHz and generally show higher values for the reference samples. The group velocities were also calculated and the results were in the range 1200-3000 m/s, indicating that these parameters can be used for wood characterization. MenosThe application of non-destructive testing (NDT) in the analysis of trees in forest plantations permits the evaluation of the wood quality, the internal defects in development or pest attack and its characterization for application as solid wood and its products. These techniques have been constantly improved with the use of computers, electronics and agricultural control levels in order to provide tools to the specialists in integrated management. The ultrasound has been used in agriculture as NDT to determine the elasticity modulus of juvenile and mature wood of pinus and other species. This study aimed to the evaluation of new techniques for characterization of wood using parameters such as the power spectral density (PSD) and phase velocity of ultrasonic signals propagating in wood. The tests were performed using a pair of ultrasonic transducers with central frequency of 50 kHz (083-067-038, GE) which were connected to an ultrasonic pulser/receiver (5077PR, Olympus). The transmitting transducer was coupled to the samples of pinus using ultrasound gel and excited with negative pulses of short duration (5 μs) and high amplitude (-400 V) to generate longitudinal and shear waves. The ultrasound signals that propagated through the samples were received by the receiving transducer, amplified (20 to 40 dB), acquired in a digital scope (MSO4104B, Tektronix) and then transferred to a microcomputer. The tests have been done with 10 reference samples (healthy) and 10 attacked ... Mostrar Tudo |
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Palavras-Chave: |
Material characterization; Método não destrutivo; Qualidade da madeira; Ultrasound. |
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Thesagro: |
Ultrassom. |
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Thesaurus Nal: |
Pinus; wood quality. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/111025/1/2014-Susete-IUS-Wood.pdf
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Marc: |
LEADER 03178nam a2200253 a 4500
001 1999260
005 2014-11-05
008 2014 bl uuuu u00u1 u #d
100 1 $aMAIA, O. M. de A.
245 $aWood characterization using the power spectral density and phase velocity of ultrasonic signals.$h[electronic resource]
260 $aIn: INTERNATIONAL ULTRASONICS SYMPOSIUM, 2014, Chicago. Proceedings. [S.l.]: IEEE$c2014
300 $ap. 1416-1419.$cDisponibilizado online.
520 $aThe application of non-destructive testing (NDT) in the analysis of trees in forest plantations permits the evaluation of the wood quality, the internal defects in development or pest attack and its characterization for application as solid wood and its products. These techniques have been constantly improved with the use of computers, electronics and agricultural control levels in order to provide tools to the specialists in integrated management. The ultrasound has been used in agriculture as NDT to determine the elasticity modulus of juvenile and mature wood of pinus and other species. This study aimed to the evaluation of new techniques for characterization of wood using parameters such as the power spectral density (PSD) and phase velocity of ultrasonic signals propagating in wood. The tests were performed using a pair of ultrasonic transducers with central frequency of 50 kHz (083-067-038, GE) which were connected to an ultrasonic pulser/receiver (5077PR, Olympus). The transmitting transducer was coupled to the samples of pinus using ultrasound gel and excited with negative pulses of short duration (5 μs) and high amplitude (-400 V) to generate longitudinal and shear waves. The ultrasound signals that propagated through the samples were received by the receiving transducer, amplified (20 to 40 dB), acquired in a digital scope (MSO4104B, Tektronix) and then transferred to a microcomputer. The tests have been done with 10 reference samples (healthy) and 10 attacked by wood wasps, with small holes in the bark. The transducers were placed on the samples in the axial, radial and inclined modes. The data were processed using the Matlab (Mathworks Inc.) to determine the power spectral density (PSD), the root mean square deviation index (cRMSDdB) and the phase velocity between the reference and attacked samples. The cRMSDdB calculated between the PSD of the reference and the attacked samples were generally higher for samples with higher degree of damage, however, in some cases, they were lower due to the presence of wood knots. The phase velocities were calculated in the frequency range 1-200 kHz and generally show higher values for the reference samples. The group velocities were also calculated and the results were in the range 1200-3000 m/s, indicating that these parameters can be used for wood characterization.
650 $aPinus
650 $awood quality
650 $aUltrassom
653 $aMaterial characterization
653 $aMétodo não destrutivo
653 $aQualidade da madeira
653 $aUltrasound
700 1 $aSCHNEIDER, F. K.
700 1 $aMAIA, J. M.
700 1 $aNEVES, L. C.
700 1 $aPENTEADO, S. do R. C.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca |
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Origem |
Tipo/Formato |
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Registro |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
14/12/2021 |
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Data da última atualização: |
15/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
SCHERER, G. C. R. da S.; COLET, R.; CAVALHEIRO, D.; STEFFENS, C.; VALDUGA, E.; CARRÃO-PANIZZI, M. C.; STEFFENS, J.; ZENI, J. |
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Afiliação: |
GLACIELA CRISTINA RODRIGUES DA SILVA SCHERER, Regional Integrated University of Alto Uruguai e das Missões, Brazil E-mail: glaciela.cristina@yahoo.com.br; ROSICLER COLET, Regional Integrated University of Alto Uruguai e das Missões, Brazil E-mail: rosicler.colet@yahoo.com.br; DARLENE CAVALHEIRO, State University of Santa Catarina, Brazil E-mail: darlene.cavalheiro@udesc.br; CLARICE STEFFENS, Regional Integrated University of Alto Uruguai e das Missões, Brazil E-mail: clarices@uricer.edu.br; EUNICE VALDUGA, Regional Integrated University of Alto Uruguai e das Missões, Brazil E-mail: veunice@uricer.edu.br; MERCEDES CONCORDIA CARRAO PANIZZI, CNPT; JULIANA STEFFENS, Regional Integrated University of Alto Uruguai e das Missões, Brazil E-mail: julisteffens@uricer.edu.br; JAMILE ZENI, Regional Integrated University of Alto Uruguai e das Missões, Brazil E-mail: jamilezeni@uricer.edu.br. |
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Título: |
Properties of tofu coagulated with Cardoon flower (Cynara Cardunculus L.) |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Research, Society and Development, v. 10, n. 16, e207101623576, 2021. |
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Idioma: |
Português |
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Conteúdo: |
Tofu was elaborated using water-soluble extract of soybean grains from the cultivar BRS 267 with cardoon flower (C. Cardunculus L.), as coagulant as an alternative to the traditional coagulant magnesium chloride. The tofu were evaluated in relation to physical, chemical, microbiological and sensory properties during 14 days. Was obsersed for the tofu coagulated with cardoon flower that the moisture, pH, total mineral, protein, and syneresis decreased with the storage, while Kunitz Trypsin Inhibitor, ureatic activity and phytic acid did not change. It was also obtained a positive effect for color (L*, a*) parameters, phytic acid, yield, syneresis, and acceptance. The textural properties, showed a tendency to increase of hardness and stickiness, while springiness and cohesiveness decreased during storage. Structurally, presented irregular-shaped, small pores or cavities. The sensory analysis, showed has great acceptance and purchase intent. Then, the cardoon flower can be used as vegetal coagulant improving the quality properties of tofu, in relation to magnesium chloride. Keywords: Texture; Acceptance; Vegetable coagulante; Storage. O tofu foi elaborado usando extrato hidrossolúvel dos grãos de soja da cultivar BRS 267, utilizando a flor do cardo (C. Cardunculus L.), como coagulante alternativo ao processo tradicional com cloreto de magnésio. O tofu foi avaliado em relação as propriedades físicas, químicas, microbiológicas e sensoriais durante 14 dias. Foi observado para o tofu coagulado com a flor do cardo que a umidade, o pH, o mineral total, a proteína e a sinérese diminuíram com o armazenamento, enquanto o Inibidor de Tripsina de Kunitz, a atividade ureática e o ácido fítico não se alteraram. Foi também observado um efeito positivo para os parâmetros de cor (L *, a *), ácido fítico, rendimento, sinérese e aceitação. As propriedades texturais mostraram uma tendência de aumentar a dureza e a gomosidade, Research, Society and Development, v. 10, n. 16, e207101623576, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i16.23576 2 enquanto a elasticidade e a coesividade diminuíram durante o armazenamento. Estruturalmente, apresentou pequenos poros ou cavidades irregulares. A análise sensorial mostrou grande aceitação e intenção de compra. Então, a flor do cardo pode ser utilizada como coagulante vegetal melhorando as propriedades de qualidade do tofu, em relação ao cloreto de magnésio. Palavras-chave: Textura; Aceitação; Coagulante vegetal; Estocagem MenosTofu was elaborated using water-soluble extract of soybean grains from the cultivar BRS 267 with cardoon flower (C. Cardunculus L.), as coagulant as an alternative to the traditional coagulant magnesium chloride. The tofu were evaluated in relation to physical, chemical, microbiological and sensory properties during 14 days. Was obsersed for the tofu coagulated with cardoon flower that the moisture, pH, total mineral, protein, and syneresis decreased with the storage, while Kunitz Trypsin Inhibitor, ureatic activity and phytic acid did not change. It was also obtained a positive effect for color (L*, a*) parameters, phytic acid, yield, syneresis, and acceptance. The textural properties, showed a tendency to increase of hardness and stickiness, while springiness and cohesiveness decreased during storage. Structurally, presented irregular-shaped, small pores or cavities. The sensory analysis, showed has great acceptance and purchase intent. Then, the cardoon flower can be used as vegetal coagulant improving the quality properties of tofu, in relation to magnesium chloride. Keywords: Texture; Acceptance; Vegetable coagulante; Storage. O tofu foi elaborado usando extrato hidrossolúvel dos grãos de soja da cultivar BRS 267, utilizando a flor do cardo (C. Cardunculus L.), como coagulante alternativo ao processo tradicional com cloreto de magnésio. O tofu foi avaliado em relação as propriedades físicas, químicas, microbiológicas e sensoriais durante 14 dias. Foi observado para o to... Mostrar Tudo |
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Palavras-Chave: |
Acceptance; Aceitação; Coagulante vegetal; Vegetable coagulante. |
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Thesagro: |
Estocagem; Textura. |
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Thesaurus NAL: |
Consumer acceptance; Storage; Texture. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/229145/1/2021-paper-tofu-flor-de-cardo-.pdf
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Marc: |
LEADER 03418naa a2200313 a 4500
001 2137807
005 2021-12-15
008 2021 bl uuuu u00u1 u #d
100 1 $aSCHERER, G. C. R. da S.
245 $aProperties of tofu coagulated with Cardoon flower (Cynara Cardunculus L.)$h[electronic resource]
260 $c2021
520 $aTofu was elaborated using water-soluble extract of soybean grains from the cultivar BRS 267 with cardoon flower (C. Cardunculus L.), as coagulant as an alternative to the traditional coagulant magnesium chloride. The tofu were evaluated in relation to physical, chemical, microbiological and sensory properties during 14 days. Was obsersed for the tofu coagulated with cardoon flower that the moisture, pH, total mineral, protein, and syneresis decreased with the storage, while Kunitz Trypsin Inhibitor, ureatic activity and phytic acid did not change. It was also obtained a positive effect for color (L*, a*) parameters, phytic acid, yield, syneresis, and acceptance. The textural properties, showed a tendency to increase of hardness and stickiness, while springiness and cohesiveness decreased during storage. Structurally, presented irregular-shaped, small pores or cavities. The sensory analysis, showed has great acceptance and purchase intent. Then, the cardoon flower can be used as vegetal coagulant improving the quality properties of tofu, in relation to magnesium chloride. Keywords: Texture; Acceptance; Vegetable coagulante; Storage. O tofu foi elaborado usando extrato hidrossolúvel dos grãos de soja da cultivar BRS 267, utilizando a flor do cardo (C. Cardunculus L.), como coagulante alternativo ao processo tradicional com cloreto de magnésio. O tofu foi avaliado em relação as propriedades físicas, químicas, microbiológicas e sensoriais durante 14 dias. Foi observado para o tofu coagulado com a flor do cardo que a umidade, o pH, o mineral total, a proteína e a sinérese diminuíram com o armazenamento, enquanto o Inibidor de Tripsina de Kunitz, a atividade ureática e o ácido fítico não se alteraram. Foi também observado um efeito positivo para os parâmetros de cor (L *, a *), ácido fítico, rendimento, sinérese e aceitação. As propriedades texturais mostraram uma tendência de aumentar a dureza e a gomosidade, Research, Society and Development, v. 10, n. 16, e207101623576, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i16.23576 2 enquanto a elasticidade e a coesividade diminuíram durante o armazenamento. Estruturalmente, apresentou pequenos poros ou cavidades irregulares. A análise sensorial mostrou grande aceitação e intenção de compra. Então, a flor do cardo pode ser utilizada como coagulante vegetal melhorando as propriedades de qualidade do tofu, em relação ao cloreto de magnésio. Palavras-chave: Textura; Aceitação; Coagulante vegetal; Estocagem
650 $aConsumer acceptance
650 $aStorage
650 $aTexture
650 $aEstocagem
650 $aTextura
653 $aAcceptance
653 $aAceitação
653 $aCoagulante vegetal
653 $aVegetable coagulante
700 1 $aCOLET, R.
700 1 $aCAVALHEIRO, D.
700 1 $aSTEFFENS, C.
700 1 $aVALDUGA, E.
700 1 $aCARRÃO-PANIZZI, M. C.
700 1 $aSTEFFENS, J.
700 1 $aZENI, J.
773 $tResearch, Society and Development$gv. 10, n. 16, e207101623576, 2021.
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Embrapa Trigo (CNPT) |
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