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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
15/12/2016 |
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Data da última atualização: |
15/12/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BAYERA, C.; GOMES, J.; ZANATTA, J. A.; VIEIRA, F. C. B.; DIECKOW, J. |
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Afiliação: |
Cimélio Bayera, Universidade Federal do Rio Grande do Sul; Juliana Gomes, Pós-graduanda da Universidade Federal do Rio Grande do Sul; JOSILEIA ACORDI ZANATTA, CNPF; Frederico Costa Beber Vieira, Universidade Federal do Pampa; Jeferson Dieckow, Universidade Federal do Paraná. |
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Título: |
Mitigating greenhouse gas emissions from a subtropical Ultisol by using long-term no-tillage in combination with legume cover crops. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Soil & Tillage Research, v. 161, p. 86-94, Aug. 2016. |
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DOI: |
http://dx.doi.org/10.1016/j.still.2016.03.011 |
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Idioma: |
Inglês |
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Conteúdo: |
Greenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-till in combination with legume cover crops provide an effective approach to sustainable low-C footprint food production in subtropical regions. MenosGreenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-... Mostrar Tudo |
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Palavras-Chave: |
Gás de efeito estufa; Óxido nitroso; Sequestro de carbono. |
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Thesaurus Nal: |
Carbon sequestration; Greenhouse gas emissions; Long term experiments; Nitrous oxide. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02509naa a2200265 a 4500
001 2058698
005 2016-12-15
008 2016 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.still.2016.03.011$2DOI
100 1 $aBAYERA, C.
245 $aMitigating greenhouse gas emissions from a subtropical Ultisol by using long-term no-tillage in combination with legume cover crops.$h[electronic resource]
260 $c2016
520 $aGreenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-till in combination with legume cover crops provide an effective approach to sustainable low-C footprint food production in subtropical regions.
650 $aCarbon sequestration
650 $aGreenhouse gas emissions
650 $aLong term experiments
650 $aNitrous oxide
653 $aGás de efeito estufa
653 $aÓxido nitroso
653 $aSequestro de carbono
700 1 $aGOMES, J.
700 1 $aZANATTA, J. A.
700 1 $aVIEIRA, F. C. B.
700 1 $aDIECKOW, J.
773 $tSoil & Tillage Research$gv. 161, p. 86-94, Aug. 2016.
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Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
18/07/2022 |
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Data da última atualização: |
31/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
MUDO, L. M. D.; QUEIROZ, A. F. S.; MELO, N. F. de; BARBOSA, M. A. G.; ANDRADE, E. C. de; BRITTO, D. de. |
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Afiliação: |
LAISLANE MIRELA DESMONDE MUDO, UNIVASF; AGDA FREIRE SILVA QUEIROZ, IF SERTÃO de Pernambuco; NATONIEL FRANKLIN DE MELO, CPATSA; MARIA ANGELICA GUIMARAES BARBOSA, CPATSA; EDUARDO CHUMBINHO DE ANDRADE, CNPMF; DOUGLAS DE BRITTO, CPATSA. |
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Título: |
Stability evaluation of dsRNA and DNA encapsulated in chitosan nanoparticles; |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
BioNanoScience, v. 12, p. 774-784, 2022. |
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DOI: |
https://doi.org/10.1007/s12668-022-01003-y |
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Idioma: |
Inglês |
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Conteúdo: |
The polyelectrolyte efect of polysaccharides can be exploited in biotechnological systems for the encapsulation and transport of nucleic acids (NA). The main target applications could be non-viral vaccines and gene silencing. As general application models, this study used plasmid DNA from Xanthomonas citri pv. viticola and dsRNA molecules. Encapsulation occurred by ionotropic gelation based on the pre- and post-addition of NA to the nanoparticle. The suspensions were characterized by UV?visible spectroscopy, electrophoresis, particle size and zeta potential (dynamic light scattering, DLS), and scanning electronic microscopy (SEM). Size distribution was around 173 nm and 587 nm, respectively, for dsRNA and DNA, according to the DLS technique. The post-addition process resulted in small nanoparticles and a more stable suspension, with high zeta potential. The SEM analysis showed spherical nanoparticle and homogeneity in distribution. The degradation study showed that the encapsulation of both dsRNA and DNA resulted in stable nanoparticles when subjected to 80 °C, ultraviolet light, and the action of the RNase enzyme (in the case of dsRNA). Furthermore, stability was still efective in the solid state through the freeze-drying and casting processes. Therefore, dsRNA and DNA nanoencapsulated by ionotropic gelation are feasible, with a high potential for phytopathological application in disease treatment and pest control. |
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Palavras-Chave: |
Cancro bacteriano da videira; Degradação de RNA e DNA; Efeito elicitor; Encapsulamento; Nanoparticula; Nanotecnologia; Quitosana. |
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Thesagro: |
Cancro Bacteriano; Doença; Uva; Xanthomonas Campestris. |
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Thesaurus NAL: |
Encapsulation; Grapes. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02439naa a2200349 a 4500
001 2144770
005 2023-01-31
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s12668-022-01003-y$2DOI
100 1 $aMUDO, L. M. D.
245 $aStability evaluation of dsRNA and DNA encapsulated in chitosan nanoparticles;$h[electronic resource]
260 $c2022
520 $aThe polyelectrolyte efect of polysaccharides can be exploited in biotechnological systems for the encapsulation and transport of nucleic acids (NA). The main target applications could be non-viral vaccines and gene silencing. As general application models, this study used plasmid DNA from Xanthomonas citri pv. viticola and dsRNA molecules. Encapsulation occurred by ionotropic gelation based on the pre- and post-addition of NA to the nanoparticle. The suspensions were characterized by UV?visible spectroscopy, electrophoresis, particle size and zeta potential (dynamic light scattering, DLS), and scanning electronic microscopy (SEM). Size distribution was around 173 nm and 587 nm, respectively, for dsRNA and DNA, according to the DLS technique. The post-addition process resulted in small nanoparticles and a more stable suspension, with high zeta potential. The SEM analysis showed spherical nanoparticle and homogeneity in distribution. The degradation study showed that the encapsulation of both dsRNA and DNA resulted in stable nanoparticles when subjected to 80 °C, ultraviolet light, and the action of the RNase enzyme (in the case of dsRNA). Furthermore, stability was still efective in the solid state through the freeze-drying and casting processes. Therefore, dsRNA and DNA nanoencapsulated by ionotropic gelation are feasible, with a high potential for phytopathological application in disease treatment and pest control.
650 $aEncapsulation
650 $aGrapes
650 $aCancro Bacteriano
650 $aDoença
650 $aUva
650 $aXanthomonas Campestris
653 $aCancro bacteriano da videira
653 $aDegradação de RNA e DNA
653 $aEfeito elicitor
653 $aEncapsulamento
653 $aNanoparticula
653 $aNanotecnologia
653 $aQuitosana
700 1 $aQUEIROZ, A. F. S.
700 1 $aMELO, N. F. de
700 1 $aBARBOSA, M. A. G.
700 1 $aANDRADE, E. C. de
700 1 $aBRITTO, D. de
773 $tBioNanoScience$gv. 12, p. 774-784, 2022.
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