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Registro Completo |
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
21/05/2012 |
Data da última atualização: |
04/11/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
AGUIAR, N. O.; OLIVARES, F. L.; NOVOTNY, E. H.; DOBBS, L. B.; BALMORI, D. M.; SANTOS JUNIOR, L. G.; CHAGAS, J. G.; FAÇANHA, A. R.; CANELLAS, L. P. |
Título: |
Bioactivity of humic acids isolated from vermicomposts at different maturation stages. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Plant and Soil, v. 362, p. 161-174, 2013. |
DOI: |
https://doi.org/10.1007/s11104-012-1277-5 |
Idioma: |
Inglês |
Conteúdo: |
Background and aims Vermicomposts are useful to improve environmental quality and sustainable agriculture. Moreover, it is enriched with highly bioactive humic acids (HAs)-like substances and can substitute no-renew source of humic substances to use as plant growth promoters in agriculture. The aim of this work was to evaluate the biological effects of HAs isolated at increasing vermicompost maturation stages. Methods Lateral root emergence, aqueous growth medium acidification and proton pumps of maize seedlings were used to monitor HAs bioactivity. Molecular conformation of the HAs was determined by sizeexclusion and reverse-phase high performance liquid chromatography. We applied spectroscopy 13C-NMR on VC samples to follow the humification process. Results We observed a decrease of carbohydrate content and selective preservation of hydrophobic alkyl and aryl C components by 13C-NMR during vermicompost maturation. Apparent molecular weight distribution of HAs did not change with vermicompost maturation, but was possible observed increase on hydrophobic moieties. Conclusion After 60 days of vermicomposting, all HAs promotes lateral root emergence, acidification of growth aqueous medium and induction of proton pumps without changes on apparent molecular weight but with enhance on hydrophobic domains. |
Palavras-Chave: |
Physiological effects; Structural bioactivity ratio. |
Thesaurus Nal: |
humic substances. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02128naa a2200265 a 4500 001 1925065 005 2021-11-04 008 2013 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/s11104-012-1277-5$2DOI 100 1 $aAGUIAR, N. O. 245 $aBioactivity of humic acids isolated from vermicomposts at different maturation stages.$h[electronic resource] 260 $c2013 520 $aBackground and aims Vermicomposts are useful to improve environmental quality and sustainable agriculture. Moreover, it is enriched with highly bioactive humic acids (HAs)-like substances and can substitute no-renew source of humic substances to use as plant growth promoters in agriculture. The aim of this work was to evaluate the biological effects of HAs isolated at increasing vermicompost maturation stages. Methods Lateral root emergence, aqueous growth medium acidification and proton pumps of maize seedlings were used to monitor HAs bioactivity. Molecular conformation of the HAs was determined by sizeexclusion and reverse-phase high performance liquid chromatography. We applied spectroscopy 13C-NMR on VC samples to follow the humification process. Results We observed a decrease of carbohydrate content and selective preservation of hydrophobic alkyl and aryl C components by 13C-NMR during vermicompost maturation. Apparent molecular weight distribution of HAs did not change with vermicompost maturation, but was possible observed increase on hydrophobic moieties. Conclusion After 60 days of vermicomposting, all HAs promotes lateral root emergence, acidification of growth aqueous medium and induction of proton pumps without changes on apparent molecular weight but with enhance on hydrophobic domains. 650 $ahumic substances 653 $aPhysiological effects 653 $aStructural bioactivity ratio 700 1 $aOLIVARES, F. L. 700 1 $aNOVOTNY, E. H. 700 1 $aDOBBS, L. B. 700 1 $aBALMORI, D. M. 700 1 $aSANTOS JUNIOR, L. G. 700 1 $aCHAGAS, J. G. 700 1 $aFAÇANHA, A. R. 700 1 $aCANELLAS, L. P. 773 $tPlant and Soil$gv. 362, p. 161-174, 2013.
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Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
04/12/2008 |
Data da última atualização: |
19/08/2013 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MANTOVANI, G.; BONK, F. A.; AZEVEDO E. R. de; PLIVELIC, T. S.; TORRIANI, I. L.; HAGE JUNIOR, E.; BONAGAMBA, T. J.; MATTOSO, L. H. C. |
Título: |
Investigation of interface structure and phase morphology in conductive elastomeric films of polyaniline-CSA/ triblock copolymers blends by solid-state NMR spin-diffusion and small-angle X-ray scattering [PTh14]. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC METALS, ICSM, 2008, Porto de Galinhas. Book of Abstracts... [S. l.: s. n.], 2008. p. 63-64. |
Idioma: |
Inglês |
Palavras-Chave: |
Evento. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/88045/1/Proci-08.00111.pdf
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Marc: |
LEADER 00810nam a2200193 a 4500 001 1027308 005 2013-08-19 008 2008 bl uuuu u00u1 u #d 100 1 $aMANTOVANI, G. 245 $aInvestigation of interface structure and phase morphology in conductive elastomeric films of polyaniline-CSA/ triblock copolymers blends by solid-state NMR spin-diffusion and small-angle X-ray scattering [PTh14]. 260 $aIn: INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC METALS, ICSM, 2008, Porto de Galinhas. Book of Abstracts... [S. l.: s. n.], 2008. p. 63-64.$c2008 653 $aEvento 700 1 $aBONK, F. A. 700 1 $aAZEVEDO E. R. de 700 1 $aPLIVELIC, T. S. 700 1 $aTORRIANI, I. L. 700 1 $aHAGE JUNIOR, E. 700 1 $aBONAGAMBA, T. J. 700 1 $aMATTOSO, L. H. C.
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