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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos; Embrapa Meio Ambiente. |
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Data corrente: |
03/12/2019 |
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Data da última atualização: |
03/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOUZA, R. S. C. de; TONON, R. V.; STEPHAN, M. P.; SILVA, C. M.; PENTEADO, A. L.; CABRAL, L. M. C.; KUROZAWA, L. E. |
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Afiliação: |
RENATA SILVA CABRAL DE SOUZA, UFRRJ; RENATA VALERIANO TONON, CTAA; MARILIA PENTEADO STEPHAN, CTAA; CAROLINE MELLINGER SILVA, CTAA; ANA LUCIA PENTEADO, CNPMA; LOURDES MARIA CORREA CABRAL, CTAA; LOUISE EMY KUROZAWA, UNICAMP. |
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Título: |
Avaliação do potencial antioxidante de proteínas do soro de leite concentradas por ultrafiltração e hidrolisadas por diferentes proteases comerciais. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Brazilian Journal of Food Technology, v. 22, e2018021, 2019. |
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DOI: |
http://dx.doi.org/10.1590/1981-6723.02118 |
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Idioma: |
Português |
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Conteúdo: |
Resumo: O objetivo do trabalho foi avaliar as atividades antioxidante e antimicrobiana de hidrolisados proteicos de soro de leite obtidos por diferentes proteases (Alcalase e Flavourzyme) e sua mistura (proporção 50:50).
Previamente à hidrólise enzimática, o soro de leite foi concentrado por ultrafiltração com membranas cerâmicas
tubulares. A reação enzimática foi realizada de acordo com o método pH-stat, sendo coletadas alíquotas com diferentes
graus de hidrólise ( GH), ao longo de cada hidrólise proteica. Os hidrolisados foram analisados quanto a estimativa do
teor de peptídeos, atividade antioxidante pelos métodos de captura do radical livre ABTS+ e do radical peroxila
(Oxygen radical antioxidant capacity - ORAC), eletroforese e atividade antimicrobiana. Os máximos GH alcançados
foram 15%, 52% e 63%, para Flavourzyme, mistura das enzimas e Alcalase, respectivamente. A atividade antioxidante
aumentou com o GH. Os hidrolisados proteicos obtidos pela Alcalase apresentaram maiores atividades antioxidantes
que os outros hidrolisados. Entretanto, nenhum hidrolisado proteico apresentou atividade antimicrobiana contra as
cepas de Salmonella choleraesuis subsp. Enteritidis (ATCC 13076) e Listeria monocytogenes (ATCC 9117).
? Abstract: The objective of this work was to evaluate the antioxidant and antimicrobial activities of whey protein
hydrolysates obtained using different commercial proteases (Alcalase and Flavourzyme) as well as their blend (50:50
ratio). Prior to the enzymatic hydrolysis, the whey was concentrated by ultrafiltration using tubular ceramic membranes.
The enzymatic reaction was carried out according to the pH-stat method, in which aliquots were collected with different
degrees of hydrolysis (DH) during the protein hydrolysis. The protein hydrolysates were evaluated with respect to the
estimated peptides content, antioxidant activity by capture of free radical ABTS+ and the peroxyl radical (Oxygen
radical antioxidant capacity - ORAC) methods, electrophoresis and antimicrobial activity. The maximum DH values
reached were: 15%, 52% and 63% for Flavourzyme, the blend of enzymes and Alcalase, respectively. The antioxidant
activity increased with the DH. The protein hydrolysates obtained using Alcalase presented higher antioxidant activities
than the other samples. However, no samples presented antimicrobial activity against Salmonella choleraesuis subsp.
Enteritidis (ATCC 13076) or Listeria monocytogenes (ATCC 9117). MenosResumo: O objetivo do trabalho foi avaliar as atividades antioxidante e antimicrobiana de hidrolisados proteicos de soro de leite obtidos por diferentes proteases (Alcalase e Flavourzyme) e sua mistura (proporção 50:50).
Previamente à hidrólise enzimática, o soro de leite foi concentrado por ultrafiltração com membranas cerâmicas
tubulares. A reação enzimática foi realizada de acordo com o método pH-stat, sendo coletadas alíquotas com diferentes
graus de hidrólise ( GH), ao longo de cada hidrólise proteica. Os hidrolisados foram analisados quanto a estimativa do
teor de peptídeos, atividade antioxidante pelos métodos de captura do radical livre ABTS+ e do radical peroxila
(Oxygen radical antioxidant capacity - ORAC), eletroforese e atividade antimicrobiana. Os máximos GH alcançados
foram 15%, 52% e 63%, para Flavourzyme, mistura das enzimas e Alcalase, respectivamente. A atividade antioxidante
aumentou com o GH. Os hidrolisados proteicos obtidos pela Alcalase apresentaram maiores atividades antioxidantes
que os outros hidrolisados. Entretanto, nenhum hidrolisado proteico apresentou atividade antimicrobiana contra as
cepas de Salmonella choleraesuis subsp. Enteritidis (ATCC 13076) e Listeria monocytogenes (ATCC 9117).
? Abstract: The objective of this work was to evaluate the antioxidant and antimicrobial activities of whey protein
hydrolysates obtained using different commercial proteases (Alcalase and Flavourzyme) as well as their blend (50:50
ratio). Prior to the enzymati... Mostrar Tudo |
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Palavras-Chave: |
Capacidade antioxidante; Degree of hydrolysis; Grau de hidrólise; Hidrólise enzimática. |
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Thesagro: |
Antioxidante; Eletroforese; Peptídeo; Proteína; Proteína Hidrolisada; Soro de Leite. |
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Thesaurus Nal: |
Antioxidant activity; Electrophoresis; Enzymatic hydrolysis; Peptides; Whey. |
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Categoria do assunto: |
E Economia e Indústria Agrícola |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/206037/1/Penteado-Avaliacao-Potencial-2019.pdf
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Marc: |
LEADER 03683naa a2200385 a 4500
001 2115788
005 2019-12-03
008 2019 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/1981-6723.02118$2DOI
100 1 $aSOUZA, R. S. C. de
245 $aAvaliação do potencial antioxidante de proteínas do soro de leite concentradas por ultrafiltração e hidrolisadas por diferentes proteases comerciais.$h[electronic resource]
260 $c2019
520 $aResumo: O objetivo do trabalho foi avaliar as atividades antioxidante e antimicrobiana de hidrolisados proteicos de soro de leite obtidos por diferentes proteases (Alcalase e Flavourzyme) e sua mistura (proporção 50:50). Previamente à hidrólise enzimática, o soro de leite foi concentrado por ultrafiltração com membranas cerâmicas tubulares. A reação enzimática foi realizada de acordo com o método pH-stat, sendo coletadas alíquotas com diferentes graus de hidrólise ( GH), ao longo de cada hidrólise proteica. Os hidrolisados foram analisados quanto a estimativa do teor de peptídeos, atividade antioxidante pelos métodos de captura do radical livre ABTS+ e do radical peroxila (Oxygen radical antioxidant capacity - ORAC), eletroforese e atividade antimicrobiana. Os máximos GH alcançados foram 15%, 52% e 63%, para Flavourzyme, mistura das enzimas e Alcalase, respectivamente. A atividade antioxidante aumentou com o GH. Os hidrolisados proteicos obtidos pela Alcalase apresentaram maiores atividades antioxidantes que os outros hidrolisados. Entretanto, nenhum hidrolisado proteico apresentou atividade antimicrobiana contra as cepas de Salmonella choleraesuis subsp. Enteritidis (ATCC 13076) e Listeria monocytogenes (ATCC 9117). ? Abstract: The objective of this work was to evaluate the antioxidant and antimicrobial activities of whey protein hydrolysates obtained using different commercial proteases (Alcalase and Flavourzyme) as well as their blend (50:50 ratio). Prior to the enzymatic hydrolysis, the whey was concentrated by ultrafiltration using tubular ceramic membranes. The enzymatic reaction was carried out according to the pH-stat method, in which aliquots were collected with different degrees of hydrolysis (DH) during the protein hydrolysis. The protein hydrolysates were evaluated with respect to the estimated peptides content, antioxidant activity by capture of free radical ABTS+ and the peroxyl radical (Oxygen radical antioxidant capacity - ORAC) methods, electrophoresis and antimicrobial activity. The maximum DH values reached were: 15%, 52% and 63% for Flavourzyme, the blend of enzymes and Alcalase, respectively. The antioxidant activity increased with the DH. The protein hydrolysates obtained using Alcalase presented higher antioxidant activities than the other samples. However, no samples presented antimicrobial activity against Salmonella choleraesuis subsp. Enteritidis (ATCC 13076) or Listeria monocytogenes (ATCC 9117).
650 $aAntioxidant activity
650 $aElectrophoresis
650 $aEnzymatic hydrolysis
650 $aPeptides
650 $aWhey
650 $aAntioxidante
650 $aEletroforese
650 $aPeptídeo
650 $aProteína
650 $aProteína Hidrolisada
650 $aSoro de Leite
653 $aCapacidade antioxidante
653 $aDegree of hydrolysis
653 $aGrau de hidrólise
653 $aHidrólise enzimática
700 1 $aTONON, R. V.
700 1 $aSTEPHAN, M. P.
700 1 $aSILVA, C. M.
700 1 $aPENTEADO, A. L.
700 1 $aCABRAL, L. M. C.
700 1 $aKUROZAWA, L. E.
773 $tBrazilian Journal of Food Technology$gv. 22, e2018021, 2019.
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Registro original: |
Embrapa Agroindústria de Alimentos (CTAA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
05/04/2017 |
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Data da última atualização: |
10/07/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
CASTRO, V. L. S. S. de; CLEMENTE, Z.; MARTINEZ, D. S.; JONSSON, C. M.; VALLIM, J. H.; BLUMEL, S. |
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Afiliação: |
VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; Z. CLEMENTE; D. S. MARTINEZ; CLAUDIO MARTIN JONSSON, CNPMA; JOSE HENRIQUE VALLIM, CNPMA; S. BLUMEL. |
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Título: |
Graphene oxide toxicological effects on daphnia and hydra. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: SETAC EUROPE ANNUAL MEETING, 26., 2016, Nantes. Proceedings... Brussels: SETAC, 2016. Ref. TU040. |
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Páginas: |
p. 202. |
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Idioma: |
Inglês |
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Conteúdo: |
The increased use of nanomaterials products requires robust strategies to identify risks when they are released into the environment. Graphene and its derivatives are promising candidates for biomedical applications and as potential advanced water purification agents. However, little is known about their ecotoxicological risks. Aquatic toxicity tests are performed with different aquatic organisms as daphnia and hydra in order to evaluate the risks resulting from the presence of graphene oxide (GO) in the environment. The following GO concentrations were tested: 0, 1, 10 and 100 mg.L-1. Acute toxicity to D. magna was evaluated in a period of 48 hours when was recorded the number of moving subjects in order to determine the CE5024h and CE5048h (n = 24 / group). The percentage of daphnia presenting mobility after 48 hours of exposure was greater than 60% in all groups. There was a concentration effect of graphene oxide (p = 0.02) and mobility was 20% lower in group exposed to 100 mg.L-1 than the control group. To evaluate the occurrence of the effect of sublethal concentrations for 96 h, it was evaluate neonate D. similis growth rate through exposure to the same conditions used for acute toxicity testing (n = 10 / group). The bodies were photographed at the start of the test and every 24 hours. Also, there was studied the effect of the organisms mobility during 96 hours calculating the median survival time of the population, defined as the average time between the start of exposure and the immobility of organisms. There was a sharp decline when the organisms were subjected to 100 mg. L-1 GO. The Hydra attenuata test was performed for 96h. The organisms were observed every 24 hours for the presence of changes ranging from tentacles with bulbs (low toxicity) till shortening of the tentacles (severe toxicity), tulip aspect and disintegration (lethal). A mean score for each concentration was calculated. No mortality was observed in any concentration tested. However, it was observed some morphological alterations after 72h of 100.0 mg.L-1 exposure as clubbed and shortened tentacles and body slightly contracted. Exposures of the test organisms indicate that GO do not present a lethal risk or adversely affect them at concentrations lower to 10.0 mg. L-1. Even though the results apparently demonstrate that GO currently do not pose a serious risk, it may exert some damage in aquatic organisms tested at higher doses. MenosThe increased use of nanomaterials products requires robust strategies to identify risks when they are released into the environment. Graphene and its derivatives are promising candidates for biomedical applications and as potential advanced water purification agents. However, little is known about their ecotoxicological risks. Aquatic toxicity tests are performed with different aquatic organisms as daphnia and hydra in order to evaluate the risks resulting from the presence of graphene oxide (GO) in the environment. The following GO concentrations were tested: 0, 1, 10 and 100 mg.L-1. Acute toxicity to D. magna was evaluated in a period of 48 hours when was recorded the number of moving subjects in order to determine the CE5024h and CE5048h (n = 24 / group). The percentage of daphnia presenting mobility after 48 hours of exposure was greater than 60% in all groups. There was a concentration effect of graphene oxide (p = 0.02) and mobility was 20% lower in group exposed to 100 mg.L-1 than the control group. To evaluate the occurrence of the effect of sublethal concentrations for 96 h, it was evaluate neonate D. similis growth rate through exposure to the same conditions used for acute toxicity testing (n = 10 / group). The bodies were photographed at the start of the test and every 24 hours. Also, there was studied the effect of the organisms mobility during 96 hours calculating the median survival time of the population, defined as the average time between the start of expo... Mostrar Tudo |
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Palavras-Chave: |
Ecotoxicologia. |
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Thesaurus NAL: |
Daphnia; Graphene; Hydra. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/161624/1/Castro-graphene.pdf
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Marc: |
LEADER 03122nam a2200229 a 4500
001 2068126
005 2017-07-10
008 2016 bl uuuu u00u1 u #d
100 1 $aCASTRO, V. L. S. S. de
245 $aGraphene oxide toxicological effects on daphnia and hydra.$h[electronic resource]
260 $aIn: SETAC EUROPE ANNUAL MEETING, 26., 2016, Nantes. Proceedings... Brussels: SETAC, 2016. Ref. TU040.$c2016
300 $ap. 202.
520 $aThe increased use of nanomaterials products requires robust strategies to identify risks when they are released into the environment. Graphene and its derivatives are promising candidates for biomedical applications and as potential advanced water purification agents. However, little is known about their ecotoxicological risks. Aquatic toxicity tests are performed with different aquatic organisms as daphnia and hydra in order to evaluate the risks resulting from the presence of graphene oxide (GO) in the environment. The following GO concentrations were tested: 0, 1, 10 and 100 mg.L-1. Acute toxicity to D. magna was evaluated in a period of 48 hours when was recorded the number of moving subjects in order to determine the CE5024h and CE5048h (n = 24 / group). The percentage of daphnia presenting mobility after 48 hours of exposure was greater than 60% in all groups. There was a concentration effect of graphene oxide (p = 0.02) and mobility was 20% lower in group exposed to 100 mg.L-1 than the control group. To evaluate the occurrence of the effect of sublethal concentrations for 96 h, it was evaluate neonate D. similis growth rate through exposure to the same conditions used for acute toxicity testing (n = 10 / group). The bodies were photographed at the start of the test and every 24 hours. Also, there was studied the effect of the organisms mobility during 96 hours calculating the median survival time of the population, defined as the average time between the start of exposure and the immobility of organisms. There was a sharp decline when the organisms were subjected to 100 mg. L-1 GO. The Hydra attenuata test was performed for 96h. The organisms were observed every 24 hours for the presence of changes ranging from tentacles with bulbs (low toxicity) till shortening of the tentacles (severe toxicity), tulip aspect and disintegration (lethal). A mean score for each concentration was calculated. No mortality was observed in any concentration tested. However, it was observed some morphological alterations after 72h of 100.0 mg.L-1 exposure as clubbed and shortened tentacles and body slightly contracted. Exposures of the test organisms indicate that GO do not present a lethal risk or adversely affect them at concentrations lower to 10.0 mg. L-1. Even though the results apparently demonstrate that GO currently do not pose a serious risk, it may exert some damage in aquatic organisms tested at higher doses.
650 $aDaphnia
650 $aGraphene
650 $aHydra
653 $aEcotoxicologia
700 1 $aCLEMENTE, Z.
700 1 $aMARTINEZ, D. S.
700 1 $aJONSSON, C. M.
700 1 $aVALLIM, J. H.
700 1 $aBLUMEL, S.
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Embrapa Meio Ambiente (CNPMA) |
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