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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
09/01/2009 |
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Data da última atualização: |
25/02/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
HANSEL, F. A.; AOKI, C. T.; MAIA, C. M. B. F.; CUNHA JÚNIOR, A.; DEDECEK, R. A. |
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Afiliação: |
Fabrício Augusto Hansel, Embrapa Florestas; Cristiane Tabuti Aoki, UFPR; Claudia Maria Branco Freitas Maia, Embrapa Florestas; Anildo Cunha Júnior, Embrapa Suínos e Aves; Renato Antônio Dedecek, Embrapa Florestas. |
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Título: |
Comparison of two alkaline treatments in the extraction of organic compounds associated with water repellency in soil under Pinus taeda. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Geoderma, v. 148, p. 167-172, 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
Isopropanol: NH3 and Methanol: KOH (saponification) alkaline treatments are usually applied in the study of soil organic matter. The first is used in studies of soil water repellency, and the latter in the extraction of ester-bound lipids from soil. In this study, isopropanol:NH3 and methanol: KOH treatments were applied separately in a solvent extracted repellent soil, in order to compare their efficiency in the extraction of water repellent compounds. The soil sample was taken from a site under a 16 year old Pinus taeda stand. The amount and class of organic compounds released by each treatment were compared using gas chromatography-mass spectrometry (GC-MS). Both treatments resulted in wettable soil after alkaline extraction. In general, alkaline treatments yielded extracts with the same class of organic compounds. Alkanoic acids, ?,?-alkanedioic acids, hydroxyalkanoic acids, aromatic compounds, and alkanols were identified, indicating the preservation of suberin and cutin biopolyester in the soil. Large differences were observed in the amounts of ?-hydroxyalkanoic acids, as well as in the quantity and distribution of dihydroxyalkanoic and trihydroxyalkanoic acids. In contrast to methanol: KOH, isopropanol: NH3 was not efficient in the extraction of whole aliphatic biopolyesters, mainly pine cutin-related products. Methanol: KOH was more effective in hydrolysis. The presence of biopolyesters in water repellent soil under the P. taeda stand seems to play an important role in water repellency. MenosIsopropanol: NH3 and Methanol: KOH (saponification) alkaline treatments are usually applied in the study of soil organic matter. The first is used in studies of soil water repellency, and the latter in the extraction of ester-bound lipids from soil. In this study, isopropanol:NH3 and methanol: KOH treatments were applied separately in a solvent extracted repellent soil, in order to compare their efficiency in the extraction of water repellent compounds. The soil sample was taken from a site under a 16 year old Pinus taeda stand. The amount and class of organic compounds released by each treatment were compared using gas chromatography-mass spectrometry (GC-MS). Both treatments resulted in wettable soil after alkaline extraction. In general, alkaline treatments yielded extracts with the same class of organic compounds. Alkanoic acids, ?,?-alkanedioic acids, hydroxyalkanoic acids, aromatic compounds, and alkanols were identified, indicating the preservation of suberin and cutin biopolyester in the soil. Large differences were observed in the amounts of ?-hydroxyalkanoic acids, as well as in the quantity and distribution of dihydroxyalkanoic and trihydroxyalkanoic acids. In contrast to methanol: KOH, isopropanol: NH3 was not efficient in the extraction of whole aliphatic biopolyesters, mainly pine cutin-related products. Methanol: KOH was more effective in hydrolysis. The presence of biopolyesters in water repellent soil under the P. taeda stand seems to play an important role ... Mostrar Tudo |
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Palavras-Chave: |
Repelência; Tratamento alcalino. |
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Thesagro: |
Água; Composto Orgânico; Extração; Pinus Taeda; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02261naa a2200253 a 4500
001 1315268
005 2015-02-25
008 2008 bl uuuu u00u1 u #d
100 1 $aHANSEL, F. A.
245 $aComparison of two alkaline treatments in the extraction of organic compounds associated with water repellency in soil under Pinus taeda.$h[electronic resource]
260 $c2008
520 $aIsopropanol: NH3 and Methanol: KOH (saponification) alkaline treatments are usually applied in the study of soil organic matter. The first is used in studies of soil water repellency, and the latter in the extraction of ester-bound lipids from soil. In this study, isopropanol:NH3 and methanol: KOH treatments were applied separately in a solvent extracted repellent soil, in order to compare their efficiency in the extraction of water repellent compounds. The soil sample was taken from a site under a 16 year old Pinus taeda stand. The amount and class of organic compounds released by each treatment were compared using gas chromatography-mass spectrometry (GC-MS). Both treatments resulted in wettable soil after alkaline extraction. In general, alkaline treatments yielded extracts with the same class of organic compounds. Alkanoic acids, ?,?-alkanedioic acids, hydroxyalkanoic acids, aromatic compounds, and alkanols were identified, indicating the preservation of suberin and cutin biopolyester in the soil. Large differences were observed in the amounts of ?-hydroxyalkanoic acids, as well as in the quantity and distribution of dihydroxyalkanoic and trihydroxyalkanoic acids. In contrast to methanol: KOH, isopropanol: NH3 was not efficient in the extraction of whole aliphatic biopolyesters, mainly pine cutin-related products. Methanol: KOH was more effective in hydrolysis. The presence of biopolyesters in water repellent soil under the P. taeda stand seems to play an important role in water repellency.
650 $aÁgua
650 $aComposto Orgânico
650 $aExtração
650 $aPinus Taeda
650 $aSolo
653 $aRepelência
653 $aTratamento alcalino
700 1 $aAOKI, C. T.
700 1 $aMAIA, C. M. B. F.
700 1 $aCUNHA JÚNIOR, A.
700 1 $aDEDECEK, R. A.
773 $tGeoderma$gv. 148, p. 167-172, 2008.
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