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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
22/03/2010 |
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Data da última atualização: |
29/11/2012 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
POCHAT, B.; FREIRE JUNIOR, M.; DUCAMP-COLLIN, M. N.; CABRAL, L. M. C.; SOARES, A. G.; MODESTA, R. C. D. |
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Afiliação: |
B. POCHAT, ENITIAA; MURILLO FREIRE JUNIOR, CTAA; M. N. DUCAMP-COLLIN, CIRAD; LOURDES MARIA CORREA CABRAL, CTAA; ANTONIO GOMES SOARES, CTAA; REGINA CELIA DELLA MODESTA. |
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Título: |
Quality evaluation of natural edible coats on minimally processed yellow melon. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: EUROPEAN FEDERATION OF FOOD SCIENCE AND TECHNOLOGY CONFERENCE, 2009, Budapest. New challenges in food preservation: processing: safety: sustainability. Wageningen: EFFoST, 2009. 1 CD-ROM. Ref. P272. |
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Idioma: |
Inglês |
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Conteúdo: |
Edible coatings associated to minimally processed fruits are conducted mainly to reduce water loss and respiration, to delay ripening and senescence phenomena and to decrease physiological and microbiological problems. The purpose of this work was to evaluate the influence of two natural edible coatings on microbiological quality and physic-chemical characteristics of minimally processed yellow melon (Cucumis melo L.). Selected fruits were sanitized, brushed and disinfested with 200 ppm HClO at 5°C during 15 minutes before cutting. Two treatments were evaluated: 1% carboxymethylcellulose (CMC) and 0.75% Chitosan. Distilled water was used as control treatment. Melon chunks were dipped into a 30 ppm HClO solution, drained, immersed in the coating solutions at 5ºC during 2 minutes. drained and packaged in Polyethylenteraphtalate (PET) boxes. The samples were then stored for nine days at 2°C and 10°C and analyzed at 3-day intervals. Determination of mass loss, colour, firmness, pH, total titrable acidity, total soluble solids content (TSS), respiration rate, as well as microbiological and sensorial analysis, were carried out to evaluate the coating efficiency in both temperatures. Regarding the chemical results, a significant difference for the CMC and Chitosan treatments was verified. Colour components were lightly increased by Chitosan and CMC treatments, which seem to preserve the fresh aspect of the product according to the sensorial panellists. The sensorial analysis pointed out the undesirable effect of Chitosan on the coated fruits’ flavour. Chitosan treatment had the best microbiological results when compared to the CMC one. According to this study the best storage temperature was 2°C. MenosEdible coatings associated to minimally processed fruits are conducted mainly to reduce water loss and respiration, to delay ripening and senescence phenomena and to decrease physiological and microbiological problems. The purpose of this work was to evaluate the influence of two natural edible coatings on microbiological quality and physic-chemical characteristics of minimally processed yellow melon (Cucumis melo L.). Selected fruits were sanitized, brushed and disinfested with 200 ppm HClO at 5°C during 15 minutes before cutting. Two treatments were evaluated: 1% carboxymethylcellulose (CMC) and 0.75% Chitosan. Distilled water was used as control treatment. Melon chunks were dipped into a 30 ppm HClO solution, drained, immersed in the coating solutions at 5ºC during 2 minutes. drained and packaged in Polyethylenteraphtalate (PET) boxes. The samples were then stored for nine days at 2°C and 10°C and analyzed at 3-day intervals. Determination of mass loss, colour, firmness, pH, total titrable acidity, total soluble solids content (TSS), respiration rate, as well as microbiological and sensorial analysis, were carried out to evaluate the coating efficiency in both temperatures. Regarding the chemical results, a significant difference for the CMC and Chitosan treatments was verified. Colour components were lightly increased by Chitosan and CMC treatments, which seem to preserve the fresh aspect of the product according to the sensorial panellists. The sensorial analysis pointe... Mostrar Tudo |
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Thesagro: |
Melão; Processamento Mínimo. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/71056/1/2009-228.pdf
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Marc: |
LEADER 02441nam a2200193 a 4500
001 1661991
005 2012-11-29
008 2009 bl uuuu u00u1 u #d
100 1 $aPOCHAT, B.
245 $aQuality evaluation of natural edible coats on minimally processed yellow melon.
260 $aIn: EUROPEAN FEDERATION OF FOOD SCIENCE AND TECHNOLOGY CONFERENCE, 2009, Budapest. New challenges in food preservation: processing: safety: sustainability. Wageningen: EFFoST, 2009. 1 CD-ROM. Ref. P272.$c2009
520 $aEdible coatings associated to minimally processed fruits are conducted mainly to reduce water loss and respiration, to delay ripening and senescence phenomena and to decrease physiological and microbiological problems. The purpose of this work was to evaluate the influence of two natural edible coatings on microbiological quality and physic-chemical characteristics of minimally processed yellow melon (Cucumis melo L.). Selected fruits were sanitized, brushed and disinfested with 200 ppm HClO at 5°C during 15 minutes before cutting. Two treatments were evaluated: 1% carboxymethylcellulose (CMC) and 0.75% Chitosan. Distilled water was used as control treatment. Melon chunks were dipped into a 30 ppm HClO solution, drained, immersed in the coating solutions at 5ºC during 2 minutes. drained and packaged in Polyethylenteraphtalate (PET) boxes. The samples were then stored for nine days at 2°C and 10°C and analyzed at 3-day intervals. Determination of mass loss, colour, firmness, pH, total titrable acidity, total soluble solids content (TSS), respiration rate, as well as microbiological and sensorial analysis, were carried out to evaluate the coating efficiency in both temperatures. Regarding the chemical results, a significant difference for the CMC and Chitosan treatments was verified. Colour components were lightly increased by Chitosan and CMC treatments, which seem to preserve the fresh aspect of the product according to the sensorial panellists. The sensorial analysis pointed out the undesirable effect of Chitosan on the coated fruits’ flavour. Chitosan treatment had the best microbiological results when compared to the CMC one. According to this study the best storage temperature was 2°C.
650 $aMelão
650 $aProcessamento Mínimo
700 1 $aFREIRE JUNIOR, M.
700 1 $aDUCAMP-COLLIN, M. N.
700 1 $aCABRAL, L. M. C.
700 1 $aSOARES, A. G.
700 1 $aMODESTA, R. C. D.
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Registro original: |
Embrapa Agroindústria de Alimentos (CTAA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
25/11/2004 |
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Data da última atualização: |
08/03/2010 |
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Autoria: |
PÉREZ, M. G.; MARTIN-NETO, L.; SAAB, S. C.; NOVOTNY, E. H.; MILORI, D. M. B. P.; BAGNATO, V. S.; COLNAGO, L. A.; MELO, W. J.; KNICKER, H. |
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Título: |
Characterization of humic acids from a brazilian oxisol under different tillage systems by EPR, 13C NMR, FTIR and fluorescence spectroscopy. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Geoderma, Amsterdam, v. 118, p. 181-190, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
The importance of soil organic matter functions is well known, but structural information, chemical composition and changes induced by anthropogenic factors such as tillage practices are still being researched. In the present paper were characterized Brazilian humic acids (HAs) from an Oxisol under different treatments: conventionaI tillage/maize-bare fallow (CTI); conventional tillage/maize rotation with soybean-bare fallow (CT2); no-till/maize-bare fallow (NTI); no-till/maize rotation with soybean-bare fallow (NT2); no-till/maize-cajanus (NT3) and no cultivated soil under natural vegetation (NC). Soil HA samples were analyzed by electron paramagnetic resonance (EPR), solid-state 13C nuclear magnetic resonance r3C NMR), Fourier transform infra-red (FTIR) and uv- Vis tluorescence spectroscopies and elemental analysis (CHNS). The FTIR spectra of the HAs were similar for alI treatments. The levei of semiquinone-type free radical determined from the EPR spectra was lower for treatments no-till/maize-cajanus (NT3) and noncultivated soil (1.74 x 1017 and 1.02 x 1017 spins g- 1 HA, respectively), compared with 2.3 x 1017 spins g- 1 HA for other soils under cultivation. The percentage of aromatic carbons determined by 13C NMR also decreases for noncultivated soil to 24%, being around 30% for samples of the other treatments. The solid-state 13C NMR and EPR spectroscopies showed small differences in chemical composition of the HA from soils where incorporation of vegetal residues was higher, showing that organic matter (OM) formed in this cases is less aromatic. The tluorescence intensities were in agreement with the percentage of aromatic carbons, determined by NMR (r=0.97 PMenosThe importance of soil organic matter functions is well known, but structural information, chemical composition and changes induced by anthropogenic factors such as tillage practices are still being researched. In the present paper were characterized Brazilian humic acids (HAs) from an Oxisol under different treatments: conventionaI tillage/maize-bare fallow (CTI); conventional tillage/maize rotation with soybean-bare fallow (CT2); no-till/maize-bare fallow (NTI); no-till/maize rotation with soybean-bare fallow (NT2); no-till/maize-cajanus (NT3) and no cultivated soil under natural vegetation (NC). Soil HA samples were analyzed by electron paramagnetic resonance (EPR), solid-state 13C nuclear magnetic resonance r3C NMR), Fourier transform infra-red (FTIR) and uv- Vis tluorescence spectroscopies and elemental analysis (CHNS). The FTIR spectra of the HAs were similar for alI treatments. The levei of semiquinone-type free radical determined from the EPR spectra was lower for treatments no-till/maize-cajanus (NT3) and noncultivated soil (1.74 x 1017 and 1.02 x 1017 spins g- 1 HA, respectively), compared with 2.3 x 1017 spins g- 1 HA for other soils under cultivation. The percentage of aromatic carbons determined by 13C NMR also decreases for noncultivated soil to 24%, being around 30% for samples of the other treatments. The solid-state 13C NMR and EPR spectroscopies showed small differences in chemical composition of the HA from soils where incorporation of vegetal residues was... Mostrar Tudo |
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Palavras-Chave: |
EPR; FTIR; NMR; Nuclear; Ressonância magnética. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02550naa a2200277 a 4500
001 1028683
005 2010-03-08
008 2004 bl --- 0-- u #d
100 1 $aPÉREZ, M. G.
245 $aCharacterization of humic acids from a brazilian oxisol under different tillage systems by EPR, 13C NMR, FTIR and fluorescence spectroscopy.
260 $c2004
520 $aThe importance of soil organic matter functions is well known, but structural information, chemical composition and changes induced by anthropogenic factors such as tillage practices are still being researched. In the present paper were characterized Brazilian humic acids (HAs) from an Oxisol under different treatments: conventionaI tillage/maize-bare fallow (CTI); conventional tillage/maize rotation with soybean-bare fallow (CT2); no-till/maize-bare fallow (NTI); no-till/maize rotation with soybean-bare fallow (NT2); no-till/maize-cajanus (NT3) and no cultivated soil under natural vegetation (NC). Soil HA samples were analyzed by electron paramagnetic resonance (EPR), solid-state 13C nuclear magnetic resonance r3C NMR), Fourier transform infra-red (FTIR) and uv- Vis tluorescence spectroscopies and elemental analysis (CHNS). The FTIR spectra of the HAs were similar for alI treatments. The levei of semiquinone-type free radical determined from the EPR spectra was lower for treatments no-till/maize-cajanus (NT3) and noncultivated soil (1.74 x 1017 and 1.02 x 1017 spins g- 1 HA, respectively), compared with 2.3 x 1017 spins g- 1 HA for other soils under cultivation. The percentage of aromatic carbons determined by 13C NMR also decreases for noncultivated soil to 24%, being around 30% for samples of the other treatments. The solid-state 13C NMR and EPR spectroscopies showed small differences in chemical composition of the HA from soils where incorporation of vegetal residues was higher, showing that organic matter (OM) formed in this cases is less aromatic. The tluorescence intensities were in agreement with the percentage of aromatic carbons, determined by NMR (r=0.97 P<O.OI) and with semiquinone content, determined by EPR (r=0.97 P<O.OI).
653 $aEPR
653 $aFTIR
653 $aNMR
653 $aNuclear
653 $aRessonância magnética
700 1 $aMARTIN-NETO, L.
700 1 $aSAAB, S. C.
700 1 $aNOVOTNY, E. H.
700 1 $aMILORI, D. M. B. P.
700 1 $aBAGNATO, V. S.
700 1 $aCOLNAGO, L. A.
700 1 $aMELO, W. J.
700 1 $aKNICKER, H.
773 $tGeoderma, Amsterdam$gv. 118, p. 181-190, 2004.
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