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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
31/05/2016 |
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Data da última atualização: |
19/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NÖLSCHER, A. C.; YAÑEZ-SERRANO, A. M.; WOLFF, S.; ARAUJO, A. C. de; LAVRIC, J. V.; KESSELMEIER, J.; WILLIAMS, J. |
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Afiliação: |
A. C. Nölscher, Max Planck Institute for Chemistry; A. M. Yañez-Serrano, Max Planck Institute for Chemistry / INPA; S. Wolff, Max Planck Institute for Chemistry / INPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU; J. V. Lavric, Max Planck Institute for Biogeochemistry; J. Kesselmeier, Max Planck Institute for Chemistry; J. Williams, Max Planck Institute for Chemistry. |
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Título: |
Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Nature Communications, v. 7, art. n. 10383, 22 Jan. 2016. |
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DOI: |
10.1038/ncomms10383 |
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Idioma: |
Inglês |
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Conteúdo: |
The hydroxyl radical (OH) removes most atmospheric pollutants from air. The loss frequency of OH radicals due to the combined effect of all gas-phase OH reactive species is a measureable quantity termed total OH reactivity. Here we present total OH reactivity observations in pristine Amazon rainforest air, as a function of season, time-of-day and height (0?80 m). Total OH reactivity is low during wet (10 s1) and high during dry season (62 s1). Comparison to individually measured trace gases reveals strong variation in unaccounted for OH reactivity, from 5 to 15% missing in wet-season afternoons to mostly unknown (average 79%) during dry season. During dry-season afternoons isoprene, considered the dominant reagent with OH in rainforests, only accounts for B20% of the total OH reactivity. Vertical profiles of OH reactivity are shaped by biogenic emissions, photochemistry and turbulent mixing. The rainforest floor was identified as a significant but poorly characterized source of OH reactivity. |
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Palavras-Chave: |
Sazonalidade. |
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Thesagro: |
Floresta. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143562/1/ncomms10383.pdf
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Marc: |
LEADER 01709naa a2200241 a 4500
001 2045925
005 2022-05-19
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1038/ncomms10383$2DOI
100 1 $aNÖLSCHER, A. C.
245 $aUnexpected seasonality in quantity and composition of Amazon rainforest air reactivity.$h[electronic resource]
260 $c2016
520 $aThe hydroxyl radical (OH) removes most atmospheric pollutants from air. The loss frequency of OH radicals due to the combined effect of all gas-phase OH reactive species is a measureable quantity termed total OH reactivity. Here we present total OH reactivity observations in pristine Amazon rainforest air, as a function of season, time-of-day and height (0?80 m). Total OH reactivity is low during wet (10 s1) and high during dry season (62 s1). Comparison to individually measured trace gases reveals strong variation in unaccounted for OH reactivity, from 5 to 15% missing in wet-season afternoons to mostly unknown (average 79%) during dry season. During dry-season afternoons isoprene, considered the dominant reagent with OH in rainforests, only accounts for B20% of the total OH reactivity. Vertical profiles of OH reactivity are shaped by biogenic emissions, photochemistry and turbulent mixing. The rainforest floor was identified as a significant but poorly characterized source of OH reactivity.
650 $aAmazonia
650 $aFloresta
653 $aSazonalidade
700 1 $aYAÑEZ-SERRANO, A. M.
700 1 $aWOLFF, S.
700 1 $aARAUJO, A. C. de
700 1 $aLAVRIC, J. V.
700 1 $aKESSELMEIER, J.
700 1 $aWILLIAMS, J.
773 $tNature Communications$gv. 7, art. n. 10383, 22 Jan. 2016.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
20/01/2020 |
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Data da última atualização: |
18/08/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
C - 0 |
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Autoria: |
SILVA, C. T. B. da; NAKASONE, A. K.; LEMOS, W. de P.; LAMEIRA, O. A.; OLIVEIRA, L. C. de. |
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Afiliação: |
CLENILDA TOLENTINO B DA SILVA, CPATU; ALESSANDRA KEIKO NAKASONE, CPATU; WALKYMARIO DE PAULO LEMOS, CPATU; OSMAR ALVES LAMEIRA, CPATU; Luana Cardoso de Oliveira, UFPA. |
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Título: |
Antimicrobial activity of alcoholic extracts of medicinal plants against Phytopathogenic fungi. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Experimental Agriculture International, v. 41, n. 6, 2019. Article no. JEAI.53424. |
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DOI: |
https://doi.org/10.9734/jeai/2019/v41i630438 |
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Idioma: |
Inglês |
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Conteúdo: |
Aims: This work aimed to evaluate the antimicrobial effects of 14 alcoholic extracts of medicinal plants on the mycelial growth of Colletotrichum gloeosporioides, Fusarium oxysporum f. sp. passiflorae, Fusarium solani and Rhizoctonia solani. Those are fungi that cause diseases in Passiflora edulis. Study Design: With the obtained data the mycelial growth rate index (MGRI) was calculated, afterwards the analysis of variance was performed and the means were compared by the Scott-Knott test at 5% probability. Place and Duration of Study: Plant Pathology Laboratory, Embrapa Eastern Amazon, Belém, Pará, Brazil, between May 2014 and April 2015. Methodology: The extracts were prepared with 1.0 g of powdered plant material and 10 mL of commercial ethyl alcohol 92.8º (0.1 g mL-1) under constant agitation in an orbital shaker at 200 rpm for 20 minutes. They were then kept in the refrigerator for 24 hours at rest. The extracts were centrifuged and filtered on Millipore membranes with 0.22 µm porosity. The tests with the phytopathogenic fungi were carried out in vitro with the alcoholic extracts at 1% concentration. The experimental design was completely randomized with 15 treatments and 5 replicates. Results: All the extracts reduced the growth of the fungi C. gloeosporioides. The extracts the Eucalyptus angulosa, Lippia alba, Zingiber officinale, Cymbopagon citratus, Azadirachta indica, Plectranthus barbathus, Hibiscus sabdariffa, Aloe vera, Pedilanthus tithymaloides, Mansoa alliacea and Chenopodium ambrosioides reduced the mycelial growth of F. oxysporum f. sp. passiflorae. Only the extract of E. angulosa presented reduction in the growth of F. solani. Meanwhile the extracts of E. angulosa, Z. officinale, L. alba, M. alliacea and P. barbathus reduced the mycelial growth of R. solani. Conclusion: All extracts presented antimicrobial potential, being that the extract of E. angulosa reduced the mycelial growth of all the evaluated fungi. MenosAims: This work aimed to evaluate the antimicrobial effects of 14 alcoholic extracts of medicinal plants on the mycelial growth of Colletotrichum gloeosporioides, Fusarium oxysporum f. sp. passiflorae, Fusarium solani and Rhizoctonia solani. Those are fungi that cause diseases in Passiflora edulis. Study Design: With the obtained data the mycelial growth rate index (MGRI) was calculated, afterwards the analysis of variance was performed and the means were compared by the Scott-Knott test at 5% probability. Place and Duration of Study: Plant Pathology Laboratory, Embrapa Eastern Amazon, Belém, Pará, Brazil, between May 2014 and April 2015. Methodology: The extracts were prepared with 1.0 g of powdered plant material and 10 mL of commercial ethyl alcohol 92.8º (0.1 g mL-1) under constant agitation in an orbital shaker at 200 rpm for 20 minutes. They were then kept in the refrigerator for 24 hours at rest. The extracts were centrifuged and filtered on Millipore membranes with 0.22 µm porosity. The tests with the phytopathogenic fungi were carried out in vitro with the alcoholic extracts at 1% concentration. The experimental design was completely randomized with 15 treatments and 5 replicates. Results: All the extracts reduced the growth of the fungi C. gloeosporioides. The extracts the Eucalyptus angulosa, Lippia alba, Zingiber officinale, Cymbopagon citratus, Azadirachta indica, Plectranthus barbathus, Hibiscus sabdariffa, Aloe vera, Pedilanthus tithymaloides, Mansoa alliacea ... Mostrar Tudo |
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Palavras-Chave: |
Atividade antifúngica; Controle alternativo; Fungos fitopatogênicos. |
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Thesagro: |
Fungo; Planta Medicinal. |
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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/209187/1/30438-Article-Text-57092-1-10-20200101.pdf
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Marc: |
LEADER 02770naa a2200241 a 4500
001 2119033
005 2020-08-18
008 2019 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.9734/jeai/2019/v41i630438$2DOI
100 1 $aSILVA, C. T. B. da
245 $aAntimicrobial activity of alcoholic extracts of medicinal plants against Phytopathogenic fungi.$h[electronic resource]
260 $c2019
520 $aAims: This work aimed to evaluate the antimicrobial effects of 14 alcoholic extracts of medicinal plants on the mycelial growth of Colletotrichum gloeosporioides, Fusarium oxysporum f. sp. passiflorae, Fusarium solani and Rhizoctonia solani. Those are fungi that cause diseases in Passiflora edulis. Study Design: With the obtained data the mycelial growth rate index (MGRI) was calculated, afterwards the analysis of variance was performed and the means were compared by the Scott-Knott test at 5% probability. Place and Duration of Study: Plant Pathology Laboratory, Embrapa Eastern Amazon, Belém, Pará, Brazil, between May 2014 and April 2015. Methodology: The extracts were prepared with 1.0 g of powdered plant material and 10 mL of commercial ethyl alcohol 92.8º (0.1 g mL-1) under constant agitation in an orbital shaker at 200 rpm for 20 minutes. They were then kept in the refrigerator for 24 hours at rest. The extracts were centrifuged and filtered on Millipore membranes with 0.22 µm porosity. The tests with the phytopathogenic fungi were carried out in vitro with the alcoholic extracts at 1% concentration. The experimental design was completely randomized with 15 treatments and 5 replicates. Results: All the extracts reduced the growth of the fungi C. gloeosporioides. The extracts the Eucalyptus angulosa, Lippia alba, Zingiber officinale, Cymbopagon citratus, Azadirachta indica, Plectranthus barbathus, Hibiscus sabdariffa, Aloe vera, Pedilanthus tithymaloides, Mansoa alliacea and Chenopodium ambrosioides reduced the mycelial growth of F. oxysporum f. sp. passiflorae. Only the extract of E. angulosa presented reduction in the growth of F. solani. Meanwhile the extracts of E. angulosa, Z. officinale, L. alba, M. alliacea and P. barbathus reduced the mycelial growth of R. solani. Conclusion: All extracts presented antimicrobial potential, being that the extract of E. angulosa reduced the mycelial growth of all the evaluated fungi.
650 $aFungo
650 $aPlanta Medicinal
653 $aAtividade antifúngica
653 $aControle alternativo
653 $aFungos fitopatogênicos
700 1 $aNAKASONE, A. K.
700 1 $aLEMOS, W. de P.
700 1 $aLAMEIRA, O. A.
700 1 $aOLIVEIRA, L. C. de
773 $tJournal of Experimental Agriculture International$gv. 41, n. 6, 2019. Article no. JEAI.53424.
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