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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: |
20/10/2021 |
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Data da última atualização: |
20/10/2021 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
NOVOTNY, E. H.; HAYES, M. H. B.; AZEVEDO, E. R. de; BONAGAMBA, T. J. |
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Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; MICHAEL H. B. HAYES, UNIVERSITY OF LIMERICK; EDUARDO R. DE AZEVEDO, USP; TITO J. BONAGAMBA, USP. |
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Título: |
Characterisation of black carbon-rich samples by 13C solid-state nuclear magnetic resonance. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Naturwissenschaften, v. 93, p. 447-450, 2006. |
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DOI: |
https://doi.org/10.1007/s00114-006-0126-x |
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Idioma: |
Inglês |
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Notas: |
Short communication. |
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Conteúdo: |
There are difficulties in quantifying and characterising the organic matter (OM) in soils that contain significant amounts of partially oxidised char or charcoal materials. The anthropogenic black carbon (BC), such as that found in the Terra Preta de Índio soils of the Amazon region, is a good example of the OM that is difficult to analyse in such soils. 13C direct polarisation/magic angle spinning (DP/MAS) at high MAS frequency, 1H-13C cross polarisation (CP)/MAS with total suppression of spinning sidebands (TOSS), and chemical shift anisotropy (CSA) filter nuclear magnetic resonance techniques have been applied successfully for quantifying the different components of OM. However, because pyrogenic materials present strong local magnetic susceptibility heterogeneities, the use of CSA-filter and TOSS make the pulse sequences very sensitive to imperfections in the π pulses. In this study, the DP/MAS pulse sequence was replaced by a CP with a radio frequency ramp-variable amplitude CP (VACP)-VACP/MAS pulse sequence, and composite π pulses were used in the CSA-filter and TOSS pulse sequences. In that way, the component functionalities in a humic acid from a BC soil were successfully determined. The spectrometer time needed was greatly decreased by employing this VACP/MAS technique. This development provides an accurate method for characterising BC-rich samples from different origins. |
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Palavras-Chave: |
Black carbon; Chemical shift anisotropy; International Humic Substance Society; Magic angle spin. |
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Thesaurus Nal: |
Humic acids. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02184naa a2200241 a 4500
001 2135461
005 2021-10-20
008 2006 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s00114-006-0126-x$2DOI
100 1 $aNOVOTNY, E. H.
245 $aCharacterisation of black carbon-rich samples by 13C solid-state nuclear magnetic resonance.$h[electronic resource]
260 $c2006
500 $aShort communication.
520 $aThere are difficulties in quantifying and characterising the organic matter (OM) in soils that contain significant amounts of partially oxidised char or charcoal materials. The anthropogenic black carbon (BC), such as that found in the Terra Preta de Índio soils of the Amazon region, is a good example of the OM that is difficult to analyse in such soils. 13C direct polarisation/magic angle spinning (DP/MAS) at high MAS frequency, 1H-13C cross polarisation (CP)/MAS with total suppression of spinning sidebands (TOSS), and chemical shift anisotropy (CSA) filter nuclear magnetic resonance techniques have been applied successfully for quantifying the different components of OM. However, because pyrogenic materials present strong local magnetic susceptibility heterogeneities, the use of CSA-filter and TOSS make the pulse sequences very sensitive to imperfections in the π pulses. In this study, the DP/MAS pulse sequence was replaced by a CP with a radio frequency ramp-variable amplitude CP (VACP)-VACP/MAS pulse sequence, and composite π pulses were used in the CSA-filter and TOSS pulse sequences. In that way, the component functionalities in a humic acid from a BC soil were successfully determined. The spectrometer time needed was greatly decreased by employing this VACP/MAS technique. This development provides an accurate method for characterising BC-rich samples from different origins.
650 $aHumic acids
653 $aBlack carbon
653 $aChemical shift anisotropy
653 $aInternational Humic Substance Society
653 $aMagic angle spin
700 1 $aHAYES, M. H. B.
700 1 $aAZEVEDO, E. R. de
700 1 $aBONAGAMBA, T. J.
773 $tNaturwissenschaften$gv. 93, p. 447-450, 2006.
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Registro original: |
Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
19/06/2017 |
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Data da última atualização: |
27/02/2020 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
OLIVEIRA, A. R. de; JACINTO, M. A. C.; FUCK, W. F.; GRASEL, F. dos S.; FACÓ, O.; SHIOTSUKI, L.; ESTEVES, S. N. |
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Afiliação: |
ALEXANDRA ROCHA DE OLIVEIRA, CNPGC; MANUEL ANTONIO CHAGAS JACINTO, CPPSE; WAGNER FERNANDO FUCK, TANAC S. A./MONTENEGRO - RS; FABIO DOS SANTOS GRASEL, TANAC S.A./MONTENEGRO - RS; OLIVARDO FACÓ, CONSERVATION AND ANIMAL GENETIC IMPROVEMENT/ SOBRAL; LUCIANA SHIOTSUKI, CONSERVATION AND ANIMAL GENETIC IMPROVEMENT/SOBRAL; SERGIO NOVITA ESTEVES, CPPSE. |
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Título: |
Qualitative aspects of sheep hides tanned with Black Jurema and Red Angico. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: CONGRESSO INTERNATIONAL UNION OF LEATHER TECHNOLOGISTS AND CHEMISTS SOCIETS, 33., 2015, Novo Hamburgo. Anais. Novo Hamburgo: ABQTIC, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Vegetable tannins, used by the tanning industry, are considered to be eco-friendly because of their natural tanning agents. They are composed of polyphenols and are divided into hydrolysable and condensed tannins. Hydrolysable tannins are glucose polyesters classified into gallic or ellagic tannins. Condensed tannins, however, consist of catechin monomers, known as flavonoids. The native sources of plant extracts for tanning hides, the tanning potential of the barks of Black Jurema (Mimosa tenuiflora [Willd.] Poir.) and Red Angico (Anadenanthera macrocarpa [Benth.] Brenan.) trees were evaluated; these species were collected from the semi-arid region of Morada Nova, in the state of Ceará, and from the cerrado biome region of Campo Grande, state of Mato Grosso do Sul (Brazil), respectively. These extracts were characterized and classified as condensed tannins. When compared to the black wattle (Acacia mearnsii De Wild), these tannins presented a lower extraction yield as well as lower light fastness. The tanning methodology used in the Morada Nova sheep hides was the same as that used in the evaluation of black wattle. The leather was not re-tanned |
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Palavras-Chave: |
Angico Preto; Black Jurema; Red Angico; Sheep hides. |
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Thesagro: |
Anadenanthera macrocarpa; Angico Bravo; Angico Vermelho; Couro; Curtume; Planta para curtume; Tanino. |
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Thesaurus NAL: |
Brazil; Hides and skins; Leather; Mimosa tenuiflora; Sheep; Tannins. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02284nam a2200385 a 4500
001 2071087
005 2020-02-27
008 2015 bl uuuu u01u1 u #d
100 1 $aOLIVEIRA, A. R. de
245 $aQualitative aspects of sheep hides tanned with Black Jurema and Red Angico.$h[electronic resource]
260 $aIn: CONGRESSO INTERNATIONAL UNION OF LEATHER TECHNOLOGISTS AND CHEMISTS SOCIETS, 33., 2015, Novo Hamburgo. Anais. Novo Hamburgo: ABQTIC$c2015
520 $aAbstract: Vegetable tannins, used by the tanning industry, are considered to be eco-friendly because of their natural tanning agents. They are composed of polyphenols and are divided into hydrolysable and condensed tannins. Hydrolysable tannins are glucose polyesters classified into gallic or ellagic tannins. Condensed tannins, however, consist of catechin monomers, known as flavonoids. The native sources of plant extracts for tanning hides, the tanning potential of the barks of Black Jurema (Mimosa tenuiflora [Willd.] Poir.) and Red Angico (Anadenanthera macrocarpa [Benth.] Brenan.) trees were evaluated; these species were collected from the semi-arid region of Morada Nova, in the state of Ceará, and from the cerrado biome region of Campo Grande, state of Mato Grosso do Sul (Brazil), respectively. These extracts were characterized and classified as condensed tannins. When compared to the black wattle (Acacia mearnsii De Wild), these tannins presented a lower extraction yield as well as lower light fastness. The tanning methodology used in the Morada Nova sheep hides was the same as that used in the evaluation of black wattle. The leather was not re-tanned
650 $aBrazil
650 $aHides and skins
650 $aLeather
650 $aMimosa tenuiflora
650 $aSheep
650 $aTannins
650 $aAnadenanthera macrocarpa
650 $aAngico Bravo
650 $aAngico Vermelho
650 $aCouro
650 $aCurtume
650 $aPlanta para curtume
650 $aTanino
653 $aAngico Preto
653 $aBlack Jurema
653 $aRed Angico
653 $aSheep hides
700 1 $aJACINTO, M. A. C.
700 1 $aFUCK, W. F.
700 1 $aGRASEL, F. dos S.
700 1 $aFACÓ, O.
700 1 $aSHIOTSUKI, L.
700 1 $aESTEVES, S. N.
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