| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agroindústria de Alimentos; Embrapa Recursos Genéticos e Biotecnologia. |
|
Data corrente: |
30/03/2015 |
|
Data da última atualização: |
16/03/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SILVA, R. F.; REZENDE, C. M.; SANTANA, H. C. D.; VIEIRA, R. F.; ALVES, R. B. N.; ALVIANO, D. S.; ALVIANO, C. S.; SANTOS, M. C. S.; BIZZO, H. R. |
|
Afiliação: |
RAFAEL F. SILVA, UFRJ; CLAUDIA M. REZENDE, UFRJ; HELLEN C. D. SANTANA, UNB; ROBERTO FONTES VIEIRA, CENARGEN; ROSA DE BELEM DAS NEVES ALVES, CENARGEN; DANIELA S. ALVIANO, UFRJ; CELUTA S. ALVIANO, UFRJ; MARCELLY CRISTINA DA SILVA SANTOS, CTAA; HUMBERTO RIBEIRO BIZZO, CTAA. |
|
Título: |
Composition and antimicrobial activity of the essential oils from the leaves and flowers of Lippia stachyoides var. martiana (Verbenaceae). |
|
Ano de publicação: |
2014 |
|
Fonte/Imprenta: |
The Natural Products Journal, v. 4, p. 241-247, 2014. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The chemical composition of the essential oil from the leaves and flowers of Lippia stachyoides var. martiana (Verbenaceae) from the Brazilian Cerrado was analyzed by GC/FID and GC/MS. Fifty-seven and forty-one essential oil constituents were identified in the flowers and leaves, respectively, being thirty-eight substances found in both oils. Flowers and leaves essential oils were rich in (E)-nerolidol (15.6 and 16.4%), ?-cadinene (15.8 and 18.5%), spathulenol (8.1 and 16.4%), caryophyllene oxide (6.6 and 7.8%) and cubebol (8.5 and 7.4%), respectively. Both essential oils also showed promising results against yeast-like fungi and bacteria. Good antifungal activity was observed for Cryptococcus neoformans, with MIC?s of 156 ?g/ml and 78 ?g/ml for flowers and leaves oils, respectively. |
|
Palavras-Chave: |
Brazilian Cerrado; Essential oil; Lippia stachyoides var martiana. |
|
Thesagro: |
Verbenaceae. |
|
Thesaurus Nal: |
gas chromatography. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 01635naa a2200277 a 4500
001 2013321
005 2023-03-16
008 2014 bl uuuu u00u1 u #d
100 1 $aSILVA, R. F.
245 $aComposition and antimicrobial activity of the essential oils from the leaves and flowers of Lippia stachyoides var. martiana (Verbenaceae).
260 $c2014
520 $aThe chemical composition of the essential oil from the leaves and flowers of Lippia stachyoides var. martiana (Verbenaceae) from the Brazilian Cerrado was analyzed by GC/FID and GC/MS. Fifty-seven and forty-one essential oil constituents were identified in the flowers and leaves, respectively, being thirty-eight substances found in both oils. Flowers and leaves essential oils were rich in (E)-nerolidol (15.6 and 16.4%), ?-cadinene (15.8 and 18.5%), spathulenol (8.1 and 16.4%), caryophyllene oxide (6.6 and 7.8%) and cubebol (8.5 and 7.4%), respectively. Both essential oils also showed promising results against yeast-like fungi and bacteria. Good antifungal activity was observed for Cryptococcus neoformans, with MIC?s of 156 ?g/ml and 78 ?g/ml for flowers and leaves oils, respectively.
650 $agas chromatography
650 $aVerbenaceae
653 $aBrazilian Cerrado
653 $aEssential oil
653 $aLippia stachyoides var martiana
700 1 $aREZENDE, C. M.
700 1 $aSANTANA, H. C. D.
700 1 $aVIEIRA, R. F.
700 1 $aALVES, R. B. N.
700 1 $aALVIANO, D. S.
700 1 $aALVIANO, C. S.
700 1 $aSANTOS, M. C. S.
700 1 $aBIZZO, H. R.
773 $tThe Natural Products Journal$gv. 4, p. 241-247, 2014.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| 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: |
01/12/2022 |
|
Data da última atualização: |
01/12/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
SILVA, M. A. R. da; SILVA, I. F.; XUE, Q.; LO, B. T. W.; TARAKINA, N. V.; NUNES, B. N.; ADLER, P.; SAHOO, S. K.; BAHNEMANN, D. W.; LÓPEZ-SALAS, N.; SAVATEEV, A.; RIBEIRO, C.; KÜLNE, T. D.; ANTONIETTI, M.; TEIXEIRA, I. F. |
|
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
|
Título: |
Sustainable oxidation catalysis supported by light: Fe-poly (heptazine imide) as a heterogeneous single-atom photocatalyst. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
Applied Catalysis B: Environmental, v. 304, a120965, 2022. |
|
Páginas: |
1 - 11 |
|
ISSN: |
0926-3373 |
|
DOI: |
https://doi.org/10.1016/j.apcatb.2021.120965 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Fe-N-C materials, when prepared as single-atom catalysts (SAC), display excellent activities in oxidation reactions. The systematic investigation of the iron coordination mode revealed that Fe-N4C catalysts are the most active for C-H bond oxidation. However, many of these catalysts are synthesized through pyrolysis, which is characterized by a lack of control and structures with heterogeneous composition, rarely presenting only atomically dispersed Fe− N − C as active sites. Herein, an alternative, reliable and easily reproducible method to obtain highly active Fe SACs (atomically dispersed) with Fe-N4 sites is presented, which is based on ion exchange of sodium from high crystalline sodium poly(heptazine imide) (Na-PHI) by other ions. The obtained catalyst can photocatalytically oxidize C-H bonds selectively toward ketones using only dioxygen. Detailed mechanism investigations indicate that the active species in the C-H bond oxidation are highly valent Fe(IV)/Fe(V)-oxo species, which are further activated by the holes generated at the PHI support under light irradiation. |
|
Palavras-Chave: |
Benzene Oxidation; Poly (heptazine imide); Single-atom catalysis. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02174naa a2200361 a 4500
001 2149063
005 2022-12-01
008 2022 bl uuuu u00u1 u #d
022 $a0926-3373
024 7 $ahttps://doi.org/10.1016/j.apcatb.2021.120965$2DOI
100 1 $aSILVA, M. A. R. da
245 $aSustainable oxidation catalysis supported by light$bFe-poly (heptazine imide) as a heterogeneous single-atom photocatalyst.$h[electronic resource]
260 $c2022
300 $a1 - 11
520 $aFe-N-C materials, when prepared as single-atom catalysts (SAC), display excellent activities in oxidation reactions. The systematic investigation of the iron coordination mode revealed that Fe-N4C catalysts are the most active for C-H bond oxidation. However, many of these catalysts are synthesized through pyrolysis, which is characterized by a lack of control and structures with heterogeneous composition, rarely presenting only atomically dispersed Fe− N − C as active sites. Herein, an alternative, reliable and easily reproducible method to obtain highly active Fe SACs (atomically dispersed) with Fe-N4 sites is presented, which is based on ion exchange of sodium from high crystalline sodium poly(heptazine imide) (Na-PHI) by other ions. The obtained catalyst can photocatalytically oxidize C-H bonds selectively toward ketones using only dioxygen. Detailed mechanism investigations indicate that the active species in the C-H bond oxidation are highly valent Fe(IV)/Fe(V)-oxo species, which are further activated by the holes generated at the PHI support under light irradiation.
653 $aBenzene Oxidation
653 $aPoly (heptazine imide)
653 $aSingle-atom catalysis
700 1 $aSILVA, I. F.
700 1 $aXUE, Q.
700 1 $aLO, B. T. W.
700 1 $aTARAKINA, N. V.
700 1 $aNUNES, B. N.
700 1 $aADLER, P.
700 1 $aSAHOO, S. K.
700 1 $aBAHNEMANN, D. W.
700 1 $aLÓPEZ-SALAS, N.
700 1 $aSAVATEEV, A.
700 1 $aRIBEIRO, C.
700 1 $aKÜLNE, T. D.
700 1 $aANTONIETTI, M.
700 1 $aTEIXEIRA, I. F.
773 $tApplied Catalysis B: Environmental$gv. 304, a120965, 2022.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Instrumentação (CNPDIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
