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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
01/08/2022 |
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Data da última atualização: |
01/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NOVOTNY, E. H.; OLIVEIRA-SILVA, R. de; MATTOS, B. B.; RECH, I.; GALVOSAS, P.; BONAGAMBA, T. J. |
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Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; RODRIGO DE OLIVEIRA-SILVA, USP/KU LEUVEN; BIANCA BRAZ MATTOS, CNPS; IONÁ RECH, USP; PETRIK GALVOSAS, VICTORIA UNIVERSITY WELLINGTON; TITO J. BONAGAMBA, USP. |
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Título: |
Study of zeolite anti-caking effects for fertilisers by 1H low-field NMR. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of Magnetic Resonance, v. 342, 107264, Sept. 2022. |
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DOI: |
https://doi.org/10.1016/j.jmr.2022.107264 |
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Idioma: |
Inglês |
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Conteúdo: |
Caking is associated with the consolidation of dry powder and granules, leading to losses of function and/or quality. It has been object of studies in the pharmaceutical, food and fertiliser areas since 1920's because of its significant impact on product quality and value. Caking has been described as a three-step event consisting of sorption-dissolution-recrystallisation phases and constitutes a critical factor in fertilisers losses during storage while also hampering fertiliser application. Current methods for the evaluation of water sorption dynamics are expensive, time-consuming and/or inaccurate. This manuscript describes an unprecedented application of low-field 1H NMR relaxometry for the kinetic study of humidity uptake, in real-time, by urea mixed with different concentrations of an anti-caking agent (zeolite). The proposed method allows to follow the water uptake in different domains of the mixed fertiliser/zeolite samples. To our knowledge, this dynamic has not been observed and quantified so far in real-time. Furthermore, we presented the use of 2D-ILT for kinetic studies, being the first dimension the usual transverse relaxation and the second dimension the kinetic one. With this approach, the NMR relaxation times T2 correlated to time constants associated with the uptake kinetics of the water. This method could be extended to several kinetic studies and experiments with temperature variation. Depending on the kinetics of the studied process, the kernel of the Laplace transform must be suitably adapted. MenosCaking is associated with the consolidation of dry powder and granules, leading to losses of function and/or quality. It has been object of studies in the pharmaceutical, food and fertiliser areas since 1920's because of its significant impact on product quality and value. Caking has been described as a three-step event consisting of sorption-dissolution-recrystallisation phases and constitutes a critical factor in fertilisers losses during storage while also hampering fertiliser application. Current methods for the evaluation of water sorption dynamics are expensive, time-consuming and/or inaccurate. This manuscript describes an unprecedented application of low-field 1H NMR relaxometry for the kinetic study of humidity uptake, in real-time, by urea mixed with different concentrations of an anti-caking agent (zeolite). The proposed method allows to follow the water uptake in different domains of the mixed fertiliser/zeolite samples. To our knowledge, this dynamic has not been observed and quantified so far in real-time. Furthermore, we presented the use of 2D-ILT for kinetic studies, being the first dimension the usual transverse relaxation and the second dimension the kinetic one. With this approach, the NMR relaxation times T2 correlated to time constants associated with the uptake kinetics of the water. This method could be extended to several kinetic studies and experiments with temperature variation. Depending on the kinetics of the studied process, the kernel of the La... Mostrar Tudo |
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Palavras-Chave: |
1H NMR Relaxometry; Agglomeration; Powder consolidation; TD-NMR. |
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Thesaurus Nal: |
Humidity. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02287naa a2200253 a 4500
001 2145062
005 2022-08-01
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.jmr.2022.107264$2DOI
100 1 $aNOVOTNY, E. H.
245 $aStudy of zeolite anti-caking effects for fertilisers by 1H low-field NMR.$h[electronic resource]
260 $c2022
520 $aCaking is associated with the consolidation of dry powder and granules, leading to losses of function and/or quality. It has been object of studies in the pharmaceutical, food and fertiliser areas since 1920's because of its significant impact on product quality and value. Caking has been described as a three-step event consisting of sorption-dissolution-recrystallisation phases and constitutes a critical factor in fertilisers losses during storage while also hampering fertiliser application. Current methods for the evaluation of water sorption dynamics are expensive, time-consuming and/or inaccurate. This manuscript describes an unprecedented application of low-field 1H NMR relaxometry for the kinetic study of humidity uptake, in real-time, by urea mixed with different concentrations of an anti-caking agent (zeolite). The proposed method allows to follow the water uptake in different domains of the mixed fertiliser/zeolite samples. To our knowledge, this dynamic has not been observed and quantified so far in real-time. Furthermore, we presented the use of 2D-ILT for kinetic studies, being the first dimension the usual transverse relaxation and the second dimension the kinetic one. With this approach, the NMR relaxation times T2 correlated to time constants associated with the uptake kinetics of the water. This method could be extended to several kinetic studies and experiments with temperature variation. Depending on the kinetics of the studied process, the kernel of the Laplace transform must be suitably adapted.
650 $aHumidity
653 $a1H NMR Relaxometry
653 $aAgglomeration
653 $aPowder consolidation
653 $aTD-NMR
700 1 $aOLIVEIRA-SILVA, R. de
700 1 $aMATTOS, B. B.
700 1 $aRECH, I.
700 1 $aGALVOSAS, P.
700 1 $aBONAGAMBA, T. J.
773 $tJournal of Magnetic Resonance$gv. 342, 107264, Sept. 2022.
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Registro original: |
Embrapa Solos (CNPS) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
26/01/2016 |
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Data da última atualização: |
26/09/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
PEREIRA, C. M. R.; GOTO, B. T.; SILVA, D. K. A. da; FERREIRA, A. C. de A.; SOUZA, F. A. de; SILVA, G. A. da S.; MAIA, L. C.; OEHL, F. |
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Afiliação: |
FRANCISCO ADRIANO DE SOUZA, CNPMS. |
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Título: |
Acaulospora reducta sp. nov. and A. excavata: two glomeromycotan fungi with pitted spores from Brazil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Mycotaxon, Ithaca, v. 130, p. 983-995,Oct./Dec. 2015. |
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DOI: |
10.5248/130.983 |
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Idioma: |
Inglês |
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Conteúdo: |
Acaulospora reducta sp. nov. and A. excavata, both characterized by large pits on their spore surfaces, were found in the semi-humid Atlantic rainforest and semi-arid Caatinga biomes of Northeastern Brazil. Phylogenetic analyses of the ITS regions of the ribosomal gene place the two fungi in two distinct clades within the Acaulosporaceae. Acaulospora reducta has whitish yellow, dark yellow to light brown spores (135–205 um in diam.) and irregularly shaped, often edged to sometimes dumbbell-shaped pits (5.5–19 × 3.5–8.6 um). These large pits have roughened irregular surfaces comprising secondary small pits (c. 0.5 ?m broad and deep) and fine ridges. Spores of A. excavata are ochre to yellow orange (sometimes yellow) and have regular circular to subcircular pits (4–20 × 4–16 um) with smooth pit surfaces. Most recently, A. reducta was also found in the Cerrado biome of Minas Gerais, suggesting its wide distribution in tropical Brazil. |
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Thesagro: |
Genética. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01647naa a2200229 a 4500
001 2035212
005 2017-09-26
008 2015 bl uuuu u00u1 u #d
024 7 $a10.5248/130.983$2DOI
100 1 $aPEREIRA, C. M. R.
245 $aAcaulospora reducta sp. nov. and A. excavata$btwo glomeromycotan fungi with pitted spores from Brazil.$h[electronic resource]
260 $c2015
520 $aAcaulospora reducta sp. nov. and A. excavata, both characterized by large pits on their spore surfaces, were found in the semi-humid Atlantic rainforest and semi-arid Caatinga biomes of Northeastern Brazil. Phylogenetic analyses of the ITS regions of the ribosomal gene place the two fungi in two distinct clades within the Acaulosporaceae. Acaulospora reducta has whitish yellow, dark yellow to light brown spores (135–205 um in diam.) and irregularly shaped, often edged to sometimes dumbbell-shaped pits (5.5–19 × 3.5–8.6 um). These large pits have roughened irregular surfaces comprising secondary small pits (c. 0.5 ?m broad and deep) and fine ridges. Spores of A. excavata are ochre to yellow orange (sometimes yellow) and have regular circular to subcircular pits (4–20 × 4–16 um) with smooth pit surfaces. Most recently, A. reducta was also found in the Cerrado biome of Minas Gerais, suggesting its wide distribution in tropical Brazil.
650 $aGenética
700 1 $aGOTO, B. T.
700 1 $aSILVA, D. K. A. da
700 1 $aFERREIRA, A. C. de A.
700 1 $aSOUZA, F. A. de
700 1 $aSILVA, G. A. da S.
700 1 $aMAIA, L. C.
700 1 $aOEHL, F.
773 $tMycotaxon, Ithaca$gv. 130, p. 983-995,Oct./Dec. 2015.
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