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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
14/11/2019 |
Data da última atualização: |
14/11/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VELOSO, M. G.; DIECKOW, J.; ZANATTA, J. A.; PERGHER, M.; BAYER, C.; HIGA, R. C. V. |
Afiliação: |
Murilo G. Veloso, UFPR; Jeferson Dieckow, UFPR; JOSILEIA ACORDI ZANATTA, CNPF; Maico Pergher, UFPR; Cimélio Bayer, UFRGS; Rosana Clara Victoria Higa, Pesquisadora aposentada da Embrapa Florestas. |
Título: |
Long-term loblolly pine land use reduces methane and net greenhouse gas emissions in a subtropical Cambisol, despite increasing nitrous oxide. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Annals of Forest Science, v. 7, n. 3, article 86, Sept. 2019. |
DOI: |
10.1007/s13595-019-0871-6 |
Idioma: |
Inglês |
Conteúdo: |
& Key message In loblolly pine land use of 17?32 years following forest clearing, CH4 consumption and N2O emission diminished by 17 years, due to high soilmoisture (~ 80%WFPS, N2O intoN2), but increased by 32 years, where medium moisture favoured methanotrophy and denitrification into N2O. Soil greenhouse gases (GHG) emission was positive by 17 years, but negative by 32, when soil sequestered carbon. & Context Much of the role of planted forests in the gaseous soil-atmosphere exchanges in the subtropics remains to be evaluated. & Aims To assess the impacts of loblolly pine (Pinus taeda L.) on soil nitrous oxide (N2O) and methane (CH4) fluxes in a subtropical Cambisol. & Methods Fluxes were monitored over 1 year with static chambers, in forest stands under natural forest (NF) and pine plantation for 17 (P17) and 32 years (P32). & Results The NF soil showed the lowestN2O emission and the highest CH4 consumption, because of the lowest water-filled pore space (WFPS, < 40%) and highest soil macroporosity. In P17, N2O emission was still low, but CH4 consumption diminished sixfold, possibly because of the predominance of methanotrophy, favoured by the highest WFPS (~ 80%) and lowest macroporosity that together with low mineral N concentration also did not favour the formation of N2O. In P32, the improved soil mineral N, macroporosity and intermediate WFPS (~ 60%) increased CH4 consumption and also N2O emission, in an environment supposedly favourable to methanotrophy and also to N2O production. Considering soil organic carbon (SOC) from a concurrent study, the net GHG emission (Mg Ceq ha?1 year?1) was 2.8 in P17 and ?1.1 in P32. Menos& Key message In loblolly pine land use of 17?32 years following forest clearing, CH4 consumption and N2O emission diminished by 17 years, due to high soilmoisture (~ 80%WFPS, N2O intoN2), but increased by 32 years, where medium moisture favoured methanotrophy and denitrification into N2O. Soil greenhouse gases (GHG) emission was positive by 17 years, but negative by 32, when soil sequestered carbon. & Context Much of the role of planted forests in the gaseous soil-atmosphere exchanges in the subtropics remains to be evaluated. & Aims To assess the impacts of loblolly pine (Pinus taeda L.) on soil nitrous oxide (N2O) and methane (CH4) fluxes in a subtropical Cambisol. & Methods Fluxes were monitored over 1 year with static chambers, in forest stands under natural forest (NF) and pine plantation for 17 (P17) and 32 years (P32). & Results The NF soil showed the lowestN2O emission and the highest CH4 consumption, because of the lowest water-filled pore space (WFPS, < 40%) and highest soil macroporosity. In P17, N2O emission was still low, but CH4 consumption diminished sixfold, possibly because of the predominance of methanotrophy, favoured by the highest WFPS (~ 80%) and lowest macroporosity that together with low mineral N concentration also did not favour the formation of N2O. In P32, the improved soil mineral N, macroporosity and intermediate WFPS (~ 60%) increased CH4 consumption and also N2O emission, in an environment supposedly favourable to methanotrophy and also to N2... Mostrar Tudo |
Palavras-Chave: |
Ammonium; GHGintensity; Nitrate; Southern Brazil. |
Thesagro: |
Nitrato; Reflorestamento; Temperatura. |
Thesaurus Nal: |
Reforestation; Temperature. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02544naa a2200301 a 4500 001 2114380 005 2019-11-14 008 2019 bl uuuu u00u1 u #d 024 7 $a10.1007/s13595-019-0871-6$2DOI 100 1 $aVELOSO, M. G. 245 $aLong-term loblolly pine land use reduces methane and net greenhouse gas emissions in a subtropical Cambisol, despite increasing nitrous oxide.$h[electronic resource] 260 $c2019 520 $a& Key message In loblolly pine land use of 17?32 years following forest clearing, CH4 consumption and N2O emission diminished by 17 years, due to high soilmoisture (~ 80%WFPS, N2O intoN2), but increased by 32 years, where medium moisture favoured methanotrophy and denitrification into N2O. Soil greenhouse gases (GHG) emission was positive by 17 years, but negative by 32, when soil sequestered carbon. & Context Much of the role of planted forests in the gaseous soil-atmosphere exchanges in the subtropics remains to be evaluated. & Aims To assess the impacts of loblolly pine (Pinus taeda L.) on soil nitrous oxide (N2O) and methane (CH4) fluxes in a subtropical Cambisol. & Methods Fluxes were monitored over 1 year with static chambers, in forest stands under natural forest (NF) and pine plantation for 17 (P17) and 32 years (P32). & Results The NF soil showed the lowestN2O emission and the highest CH4 consumption, because of the lowest water-filled pore space (WFPS, < 40%) and highest soil macroporosity. In P17, N2O emission was still low, but CH4 consumption diminished sixfold, possibly because of the predominance of methanotrophy, favoured by the highest WFPS (~ 80%) and lowest macroporosity that together with low mineral N concentration also did not favour the formation of N2O. In P32, the improved soil mineral N, macroporosity and intermediate WFPS (~ 60%) increased CH4 consumption and also N2O emission, in an environment supposedly favourable to methanotrophy and also to N2O production. Considering soil organic carbon (SOC) from a concurrent study, the net GHG emission (Mg Ceq ha?1 year?1) was 2.8 in P17 and ?1.1 in P32. 650 $aReforestation 650 $aTemperature 650 $aNitrato 650 $aReflorestamento 650 $aTemperatura 653 $aAmmonium 653 $aGHGintensity 653 $aNitrate 653 $aSouthern Brazil 700 1 $aDIECKOW, J. 700 1 $aZANATTA, J. A. 700 1 $aPERGHER, M. 700 1 $aBAYER, C. 700 1 $aHIGA, R. C. V. 773 $tAnnals of Forest Science$gv. 7, n. 3, article 86, Sept. 2019.
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Embrapa Florestas (CNPF) |
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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
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
21/12/2023 |
Data da última atualização: |
15/05/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 3 |
Autoria: |
DORM, B. C.; PARIS JUNIOR, J. A.; SILVA, L. H. D. da; FORATO, L. A.; NOSSA, T. S.; CARVALHO, A. J. F.; RESENDE, F. A.; GANDINI, A.; TROVATTI, E. |
Afiliação: |
LUCIMARA APARECIDA FORATO, CNPDIA. |
Título: |
Synthesis of a cysteine Diels–Alder‑based polymer by simultaneous double‑click chemistry and its cyto‑genotoxicity evaluation. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Macromolecular Research, v. 32, n. 2, 2023. |
Páginas: |
133-144 |
ISSN: |
2092-7673 |
DOI: |
https://doi.org/10.1007/s13233-023-00216-8 |
Idioma: |
Inglês |
Conteúdo: |
Abstract The click chemistry reactions and its use in living organisms have been widely developed; however, few studies describe the safety of the reagents and products. Furan–maleimide represent one important pair of reagents for the click Diels–Alder reaction, and were chosen here to perform the minimalist click reaction with cysteine to reveal their preliminary safety features by cytotoxicity tests. The functional groups of amino acids allow them to be chemically modifed, mainly for the synthesis of monomers and polymers. Here, cysteine was used in the click reaction, since it displays an SH group in its side chain, useful to perform thiol–ene reactions. Its amine group easily reacts with anhydrides, allowing it to couple with the furan derivative “furan–maleic anhydride adduct”. The mixture of the cysteine with the adduct in solution gives rise to the double simultaneous thiol–ene/amine maleimide click reactions. The thiol group and the furan double bond provide the reactive functional groups for the polymerization. The synthesis of the polymer based on cysteine–Diels–Alder adduct confrmed the condensation nature of the reaction. Preliminary safety and biocompatibility tests of this new polymer and its starting reagents were carried out, since these parameters represent one of the most important features for operating and scaling up the production. This one-step double-click reaction is interesting for application in several felds, since it has the advantage of using natural and renewable raw materials, in addition to its handling safety. MenosAbstract The click chemistry reactions and its use in living organisms have been widely developed; however, few studies describe the safety of the reagents and products. Furan–maleimide represent one important pair of reagents for the click Diels–Alder reaction, and were chosen here to perform the minimalist click reaction with cysteine to reveal their preliminary safety features by cytotoxicity tests. The functional groups of amino acids allow them to be chemically modifed, mainly for the synthesis of monomers and polymers. Here, cysteine was used in the click reaction, since it displays an SH group in its side chain, useful to perform thiol–ene reactions. Its amine group easily reacts with anhydrides, allowing it to couple with the furan derivative “furan–maleic anhydride adduct”. The mixture of the cysteine with the adduct in solution gives rise to the double simultaneous thiol–ene/amine maleimide click reactions. The thiol group and the furan double bond provide the reactive functional groups for the polymerization. The synthesis of the polymer based on cysteine–Diels–Alder adduct confrmed the condensation nature of the reaction. Preliminary safety and biocompatibility tests of this new polymer and its starting reagents were carried out, since these parameters represent one of the most important features for operating and scaling up the production. This one-step double-click reaction is interesting for application in several felds, since it has the advantage of using nat... Mostrar Tudo |
Palavras-Chave: |
Diels–Alder; Renewable resource; Thiol-ene. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02466naa a2200289 a 4500 001 2160195 005 2024-05-15 008 2023 bl uuuu u00u1 u #d 022 $a2092-7673 024 7 $ahttps://doi.org/10.1007/s13233-023-00216-8$2DOI 100 1 $aDORM, B. C. 245 $aSynthesis of a cysteine Diels–Alder‑based polymer by simultaneous double‑click chemistry and its cyto‑genotoxicity evaluation.$h[electronic resource] 260 $c2023 300 $a133-144 520 $aAbstract The click chemistry reactions and its use in living organisms have been widely developed; however, few studies describe the safety of the reagents and products. Furan–maleimide represent one important pair of reagents for the click Diels–Alder reaction, and were chosen here to perform the minimalist click reaction with cysteine to reveal their preliminary safety features by cytotoxicity tests. The functional groups of amino acids allow them to be chemically modifed, mainly for the synthesis of monomers and polymers. Here, cysteine was used in the click reaction, since it displays an SH group in its side chain, useful to perform thiol–ene reactions. Its amine group easily reacts with anhydrides, allowing it to couple with the furan derivative “furan–maleic anhydride adduct”. The mixture of the cysteine with the adduct in solution gives rise to the double simultaneous thiol–ene/amine maleimide click reactions. The thiol group and the furan double bond provide the reactive functional groups for the polymerization. The synthesis of the polymer based on cysteine–Diels–Alder adduct confrmed the condensation nature of the reaction. Preliminary safety and biocompatibility tests of this new polymer and its starting reagents were carried out, since these parameters represent one of the most important features for operating and scaling up the production. This one-step double-click reaction is interesting for application in several felds, since it has the advantage of using natural and renewable raw materials, in addition to its handling safety. 653 $aDiels–Alder 653 $aRenewable resource 653 $aThiol-ene 700 1 $aPARIS JUNIOR, J. A. 700 1 $aSILVA, L. H. D. da 700 1 $aFORATO, L. A. 700 1 $aNOSSA, T. S. 700 1 $aCARVALHO, A. J. F. 700 1 $aRESENDE, F. A. 700 1 $aGANDINI, A. 700 1 $aTROVATTI, E. 773 $tMacromolecular Research$gv. 32, n. 2, 2023.
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