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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
06/03/2001 |
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Data da última atualização: |
02/04/2012 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SALERNO, A. R.; SCHALLENBERGER, T. C. H.; STUKER, H. |
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Afiliação: |
Epagri |
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Título: |
Quebra de dormencia em sementes de canafistula. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Agropecuaria Catarinense, Florianopolis, v. 9, n. 1, p. 09-11, jun./ago. 1996. |
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Idioma: |
Português |
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Conteúdo: |
A canafístula (Peltophorum dubium) constitui-se numa espécie arbórea nativa do Oeste Catarinense, mas que apresenta crescimento relativamente rápido no Litoral e Vale do Itajaí. A formação de mudas dessa espécie é favorecida pela abundante produção de sementes que, no entanto, não germinam com facilidade. Para isso há necessidade do rompimento do tegumento rígido que envolve as sementes, o que pode ser feito com ácido sulfúrico concentrado. Esse produto é de manuseio perigoso e tem custo elevado, sendo necessário buscar alternativas mais adequadas para recomendação aos viveiristas. Assim foi feito um experimento testando água aquecida a 80, 90 ou 100 graus Celsius e três volumes de água em relação às sementes: quatro, oito e doze partes de água para uma de sementes. Os resultados indicaram que as sementes de canafístula precisam de água aquecida a 100 graus na proporção de oito partes de água para uma de sementes. Esse procedimento deve ser feito fora da fonte de aquecimento, ocorrendo a germinação depois de 7 a 14 dias.
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Palavras-Chave: |
Arvore; Canafistula; Peltophorum dubium; Quebra de dormencia; Reflorestamento; Semente. |
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Categoria do assunto: |
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Marc: |
LEADER 01666naa a2200217 a 4500
001 1016061
005 2012-04-02
008 1996 bl uuuu u00u1 u #d
100 1 $aSALERNO, A. R.
245 $aQuebra de dormencia em sementes de canafistula.
260 $c1996
520 $aA canafístula (Peltophorum dubium) constitui-se numa espécie arbórea nativa do Oeste Catarinense, mas que apresenta crescimento relativamente rápido no Litoral e Vale do Itajaí. A formação de mudas dessa espécie é favorecida pela abundante produção de sementes que, no entanto, não germinam com facilidade. Para isso há necessidade do rompimento do tegumento rígido que envolve as sementes, o que pode ser feito com ácido sulfúrico concentrado. Esse produto é de manuseio perigoso e tem custo elevado, sendo necessário buscar alternativas mais adequadas para recomendação aos viveiristas. Assim foi feito um experimento testando água aquecida a 80, 90 ou 100 graus Celsius e três volumes de água em relação às sementes: quatro, oito e doze partes de água para uma de sementes. Os resultados indicaram que as sementes de canafístula precisam de água aquecida a 100 graus na proporção de oito partes de água para uma de sementes. Esse procedimento deve ser feito fora da fonte de aquecimento, ocorrendo a germinação depois de 7 a 14 dias.
653 $aArvore
653 $aCanafistula
653 $aPeltophorum dubium
653 $aQuebra de dormencia
653 $aReflorestamento
653 $aSemente
700 1 $aSCHALLENBERGER, T. C. H.
700 1 $aSTUKER, H.
773 $tAgropecuaria Catarinense, Florianopolis$gv. 9, n. 1, p. 09-11, jun./ago. 1996.
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Epagri-Sede (Epagri-Sede) |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
24/10/2016 |
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Data da última atualização: |
24/10/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
MERLIN, N.; KARLING, M.; MORALES, R. G. F.; OLDONI, T. L. C. |
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Título: |
Profile of Phenolic Antioxidants from Moringa oleifera Leaves. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: BRAZILIAN CONGRESS OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS, 48., LATIN AMERICAN CONGRESS OF PHARMACOLOGY, 21., 2016, Foz do Iguaçu, PR. Resumos... Curitiba, PR: SBFTE, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
Introduction: Moringa oleifera leaves have a wide variety of phenolic compounds, especially flavonoids [1, 2]. Since there are few investigations on the antioxidant activity (AA) of M. oleifera grown in Brazil, the aim of the present study was to evaluate the profile of phenolic compounds from leaves extracts of this species, collected in Itajaí ? Santa Catarina, by HPLC-DAD, and its AA, by an in vitro assay. Methods: Plant identification was performed and a voucher specimen (HPB 483) was deposited at the Herbarium of UTFPR, campus Pato Branco. M. oleifera leaves were dried in an oven at 40-45 °C and were ground. Successive extraction was carried out at room temperature, under shaking. Solvents were added in the following order: hexane (E-Hex), dichloromethane (E-CH2Cl2), ethyl acetate (E-EtOAc), acetone (E-Ace), ethanol (E-EtOH) and 50% ethanol (E-Hydro). Each solvent was replaced four times. Extracts were evaporated in a rotary evaporator and E-Hydro was also lyophilized. AA was determined, in triplicate, by the ABTS free radical scavenging method [3]. The determination of phenolic profile was performed on a Varian 920 liquid chromatograph, using a C18 Agilent column (250 x 4,6 mm, 5 µm), wich was maintained at 30 °C, and a diode array detector. 10 µL of extracts, prepared in a concentration of 15 g L-1, were injected. The mobile phase was a mixture of water:acetic acid (98:2, v/v) (solvent A) and acetonitrile:water:acetic acid (40:58:2, v/v) (solvent B), with a flow rate of 1 mL min-1, in a gradient mode. Identification was made by comparison of the absorption spectrum in the ultraviolet region and of the retention time with standards of phenolic acids: gallic, vanillic, caffeic, coumaric, ferulic and salicylic; flavonoids: catechin, epicatechin, rutin, myricetin and quercetin; and the stilbene trans-resveratrol. Results: Five of the phenolic standards were identified in at least one of the extracts: two monophenols, gallic and caffeic acids; and three flavonoids, epicatechin, rutin and quercetin. The lowest AA were observed for E-Hex and E-CH2Cl2 (149,04 ± 15,03 and 191,34 ± 5,33 µmol Trolox/g extract, respectively), results that should be related to the chromatographic profiles shown by both extracts, with few low intensity signals. On the other side, E-Hydro showed the best AA (789,54 ± 45,74 µmol Trolox/g extract) and, also, a profile with high intensity signals. Moreover, the diversity of chromatographic signals observed for E-EtOAc, E-Ace, E-EtOH and E-Hydro suggests that M. oleifera leaves have various bioactive compounds. Conclusion: Extracts showed distinct chemical profiles, proving the extraction capacity of solvents with different polarities. Together, the AA and the chromatographic profiles of E-EtOAc, E-Ace, E-EtOH and E-Hydro suggest the potential of M. oleifera leaves, grown in Itajaí, as a source of bioactive molecules. MenosIntroduction: Moringa oleifera leaves have a wide variety of phenolic compounds, especially flavonoids [1, 2]. Since there are few investigations on the antioxidant activity (AA) of M. oleifera grown in Brazil, the aim of the present study was to evaluate the profile of phenolic compounds from leaves extracts of this species, collected in Itajaí ? Santa Catarina, by HPLC-DAD, and its AA, by an in vitro assay. Methods: Plant identification was performed and a voucher specimen (HPB 483) was deposited at the Herbarium of UTFPR, campus Pato Branco. M. oleifera leaves were dried in an oven at 40-45 °C and were ground. Successive extraction was carried out at room temperature, under shaking. Solvents were added in the following order: hexane (E-Hex), dichloromethane (E-CH2Cl2), ethyl acetate (E-EtOAc), acetone (E-Ace), ethanol (E-EtOH) and 50% ethanol (E-Hydro). Each solvent was replaced four times. Extracts were evaporated in a rotary evaporator and E-Hydro was also lyophilized. AA was determined, in triplicate, by the ABTS free radical scavenging method [3]. The determination of phenolic profile was performed on a Varian 920 liquid chromatograph, using a C18 Agilent column (250 x 4,6 mm, 5 µm), wich was maintained at 30 °C, and a diode array detector. 10 µL of extracts, prepared in a concentration of 15 g L-1, were injected. The mobile phase was a mixture of water:acetic acid (98:2, v/v) (solvent A) and acetonitrile:water:acetic acid (40:58:2, v/v) (solvent B), with a flow rate ... Mostrar Tudo |
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Palavras-Chave: |
antioxidant activity; flavonoids; phenolic compounds. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 03586naa a2200193 a 4500
001 1125652
005 2016-10-24
008 2016 bl uuuu u00u1 u #d
100 1 $aMERLIN, N.
245 $aProfile of Phenolic Antioxidants from Moringa oleifera Leaves.$h[electronic resource]
260 $c2016
520 $aIntroduction: Moringa oleifera leaves have a wide variety of phenolic compounds, especially flavonoids [1, 2]. Since there are few investigations on the antioxidant activity (AA) of M. oleifera grown in Brazil, the aim of the present study was to evaluate the profile of phenolic compounds from leaves extracts of this species, collected in Itajaí ? Santa Catarina, by HPLC-DAD, and its AA, by an in vitro assay. Methods: Plant identification was performed and a voucher specimen (HPB 483) was deposited at the Herbarium of UTFPR, campus Pato Branco. M. oleifera leaves were dried in an oven at 40-45 °C and were ground. Successive extraction was carried out at room temperature, under shaking. Solvents were added in the following order: hexane (E-Hex), dichloromethane (E-CH2Cl2), ethyl acetate (E-EtOAc), acetone (E-Ace), ethanol (E-EtOH) and 50% ethanol (E-Hydro). Each solvent was replaced four times. Extracts were evaporated in a rotary evaporator and E-Hydro was also lyophilized. AA was determined, in triplicate, by the ABTS free radical scavenging method [3]. The determination of phenolic profile was performed on a Varian 920 liquid chromatograph, using a C18 Agilent column (250 x 4,6 mm, 5 µm), wich was maintained at 30 °C, and a diode array detector. 10 µL of extracts, prepared in a concentration of 15 g L-1, were injected. The mobile phase was a mixture of water:acetic acid (98:2, v/v) (solvent A) and acetonitrile:water:acetic acid (40:58:2, v/v) (solvent B), with a flow rate of 1 mL min-1, in a gradient mode. Identification was made by comparison of the absorption spectrum in the ultraviolet region and of the retention time with standards of phenolic acids: gallic, vanillic, caffeic, coumaric, ferulic and salicylic; flavonoids: catechin, epicatechin, rutin, myricetin and quercetin; and the stilbene trans-resveratrol. Results: Five of the phenolic standards were identified in at least one of the extracts: two monophenols, gallic and caffeic acids; and three flavonoids, epicatechin, rutin and quercetin. The lowest AA were observed for E-Hex and E-CH2Cl2 (149,04 ± 15,03 and 191,34 ± 5,33 µmol Trolox/g extract, respectively), results that should be related to the chromatographic profiles shown by both extracts, with few low intensity signals. On the other side, E-Hydro showed the best AA (789,54 ± 45,74 µmol Trolox/g extract) and, also, a profile with high intensity signals. Moreover, the diversity of chromatographic signals observed for E-EtOAc, E-Ace, E-EtOH and E-Hydro suggests that M. oleifera leaves have various bioactive compounds. Conclusion: Extracts showed distinct chemical profiles, proving the extraction capacity of solvents with different polarities. Together, the AA and the chromatographic profiles of E-EtOAc, E-Ace, E-EtOH and E-Hydro suggest the potential of M. oleifera leaves, grown in Itajaí, as a source of bioactive molecules.
653 $aantioxidant activity
653 $aflavonoids
653 $aphenolic compounds
700 1 $aKARLING, M.
700 1 $aMORALES, R. G. F.
700 1 $aOLDONI, T. L. C.
773 $tIn: BRAZILIAN CONGRESS OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS, 48., LATIN AMERICAN CONGRESS OF PHARMACOLOGY, 21., 2016, Foz do Iguaçu, PR. Resumos... Curitiba, PR: SBFTE, 2016.
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