| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Instrumentação. |
|
Data corrente: |
20/01/2005 |
|
Data da última atualização: |
08/03/2010 |
|
Autoria: |
MARTINS, M. A.; JOEKES, I.; FERREIRA, F. C.; JOB, A. E.; MATTOSO, L. H. C. |
|
Título: |
Thermal behavior of raw and chemically treated sisal fibers. |
|
Ano de publicação: |
2004 |
|
Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON NATURAL POLYMERS AND COMPOSITES, 5. Anais... São Pedro: ABPol: CNPDIA/EMBRAPA: FCA/UNESP: FEQ/UNICAMP/USP, 2004. p. 13-15. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: In this work mercerization, acetylation, and resorcinol/hexamethylenetetra- mine (R/H) solution treatments have been applied to sisal fibers to enhance adhesion with polymer matrices in composite materiais. The thermal behavior of raw and chemi- cally treated sisal fibers has been studied using the thermal gravimetric analysis (TGA) and the differential thermal gravimetry (DTG). The value of the initial decomposition temperature of sisal has been found to increase as a result of mercerization/acetylation treatment. Moreover, the rate ofthermal degradation offibers treated with RIH solution has beenfound to be lower than those of the raw fibers. |
|
Palavras-Chave: |
Fibra de sisal; TGA; Tratamento químico. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01309naa a2200205 a 4500
001 1028763
005 2010-03-08
008 2004 bl --- 0-- u #d
100 1 $aMARTINS, M. A.
245 $aThermal behavior of raw and chemically treated sisal fibers.
260 $c2004
520 $aAbstract: In this work mercerization, acetylation, and resorcinol/hexamethylenetetra- mine (R/H) solution treatments have been applied to sisal fibers to enhance adhesion with polymer matrices in composite materiais. The thermal behavior of raw and chemi- cally treated sisal fibers has been studied using the thermal gravimetric analysis (TGA) and the differential thermal gravimetry (DTG). The value of the initial decomposition temperature of sisal has been found to increase as a result of mercerization/acetylation treatment. Moreover, the rate ofthermal degradation offibers treated with RIH solution has beenfound to be lower than those of the raw fibers.
653 $aFibra de sisal
653 $aTGA
653 $aTratamento químico
700 1 $aJOEKES, I.
700 1 $aFERREIRA, F. C.
700 1 $aJOB, A. E.
700 1 $aMATTOSO, L. H. C.
773 $tIn: INTERNATIONAL SYMPOSIUM ON NATURAL POLYMERS AND COMPOSITES, 5. Anais... São Pedro: ABPol: CNPDIA/EMBRAPA: FCA/UNESP: FEQ/UNICAMP/USP, 2004. p. 13-15.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Instrumentação (CNPDIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Milho e Sorgo. |
|
Data corrente: |
18/01/2023 |
|
Data da última atualização: |
10/04/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
MAIA, M. P.; SILVA, C. G. M.; MARTINS, G. R.; SILVA, D. de O.; PEREIRA, A. L. X.; MAMEDES, A. de S.; PASSOS, A. M. A. dos. |
|
Afiliação: |
MAYANA PEREIRA MAIA, UNIVERSIDADE FEDERAL DE RONDÔNIA; CARINE GREGÓRIO MACHADO SILVA; GUILHERME RODRIGUES MARTINS, UNIVERSIDADE FEDERAL DE RONDÔNIA; DANIELLE DE OLIVEIRA SILVA, UNIVERSIDADE FEDERAL DE RONDÔNIA; ANA LUIZA XAVIER PEREIRA, UNIVERSIDADE FEDERAL DE RONDÔNIA; ARTUR DE SOUZA MAMEDES, UNIVERSIDADE FEDERAL DE RONDÔNIA; ALEXANDRE MARTINS ABDAO DOS PASSOS, CNPMS. |
|
Título: |
Impact of ultraviolet C radiation and ozone application on the physiological quality of organic maize seeds. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
International Journal of Advanced Engineering Research and Science, v. 9, n. 12, p. 456-465, 2022. |
|
DOI: |
https://dx.doi.org/10.22161/ijaers.912.51 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Non-thermal energy sources have been utilized to control diseases and boost the physiological quality of maize seeds. The aim of this paper was to assess the impact of UV-c exposure and ozone application, associated or not, on organic maize seed germination and seedling vigor. Three cultivars (BRS Caimbé, BRS 1060 and BR 451), three exposure levels to ozone (15, 30 and 60 minutes) in the absence and presence of ultraviolet radiation (UV-c), were used in a completely randomized design with a factorial scheme of 3 x 3 x 2 + 3 (additional treatments) experiment. Evaluations of electrical conductivity, emergence in soil, and germination (at 4th and 7th day) on paper roll were done. Daily measurements of the emerged seedlings were taken up to the 14th day after emergence. The measurements included total emergence (EC), coefficient of variation in emergence time (CVt) in percentage, coefficient of emergence velocity (CVe) in percentage, emergence rate index (ERI) in days, and emergence synchronization index (Z). The tested genotypes caused differences in all studied variables. Increasing the percentage with a 30-minute exposure to ozone in the presence of UV-C radiation resulted in a validated enhance in the first germination reading. The association of O3 and UV-c techniques can be used to treat organic maize seeds without significantly affecting their physiological quality. |
|
Palavras-Chave: |
Qualidade fisiológica. |
|
Thesagro: |
Germinação; Milho; Ozônio; Raio Ultravioleta; Semente. |
|
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1151060/1/Impact-of-ultraviolet-C-radiation-and-ozone-application.pdf
|
|
Marc: |
LEADER 02279naa a2200277 a 4500
001 2151060
005 2024-04-10
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://dx.doi.org/10.22161/ijaers.912.51$2DOI
100 1 $aMAIA, M. P.
245 $aImpact of ultraviolet C radiation and ozone application on the physiological quality of organic maize seeds.$h[electronic resource]
260 $c2022
520 $aNon-thermal energy sources have been utilized to control diseases and boost the physiological quality of maize seeds. The aim of this paper was to assess the impact of UV-c exposure and ozone application, associated or not, on organic maize seed germination and seedling vigor. Three cultivars (BRS Caimbé, BRS 1060 and BR 451), three exposure levels to ozone (15, 30 and 60 minutes) in the absence and presence of ultraviolet radiation (UV-c), were used in a completely randomized design with a factorial scheme of 3 x 3 x 2 + 3 (additional treatments) experiment. Evaluations of electrical conductivity, emergence in soil, and germination (at 4th and 7th day) on paper roll were done. Daily measurements of the emerged seedlings were taken up to the 14th day after emergence. The measurements included total emergence (EC), coefficient of variation in emergence time (CVt) in percentage, coefficient of emergence velocity (CVe) in percentage, emergence rate index (ERI) in days, and emergence synchronization index (Z). The tested genotypes caused differences in all studied variables. Increasing the percentage with a 30-minute exposure to ozone in the presence of UV-C radiation resulted in a validated enhance in the first germination reading. The association of O3 and UV-c techniques can be used to treat organic maize seeds without significantly affecting their physiological quality.
650 $aGerminação
650 $aMilho
650 $aOzônio
650 $aRaio Ultravioleta
650 $aSemente
653 $aQualidade fisiológica
700 1 $aSILVA, C. G. M.
700 1 $aMARTINS, G. R.
700 1 $aSILVA, D. de O.
700 1 $aPEREIRA, A. L. X.
700 1 $aMAMEDES, A. de S.
700 1 $aPASSOS, A. M. A. dos
773 $tInternational Journal of Advanced Engineering Research and Science$gv. 9, n. 12, p. 456-465, 2022.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
