| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
24/04/2008 |
|
Data da última atualização: |
13/06/2017 |
|
Tipo da produção científica: |
Folder/Folheto/Cartilha |
|
Autoria: |
RODRIGUES, J. E. L. F. |
|
Afiliação: |
JOAO ELIAS LOPES F RODRIGUES, CPATU. |
|
Título: |
Produção de mudas de mandioca variedade paraiba, para a agricultura familiar, em Salvaterra - Marajó - Pará: unidade demonstrativa. |
|
Ano de publicação: |
2007 |
|
Fonte/Imprenta: |
Belém, PA: Embrapa Amazônia Oriental, 2007. |
|
Descrição Física: |
Não paginado. |
|
Idioma: |
Português |
|
Notas: |
1 folder. |
|
Palavras-Chave: |
Brasil; Pará; Salvaterra. |
|
Thesagro: |
Adubação; Agricultura Familiar; Mandioca; Produção Agrícola; Variedade. |
|
Thesaurus Nal: |
Amazonia. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/91121/1/Fd386.pdf
|
|
Marc: |
LEADER 00680nam a2200229 a 4500
001 1390817
005 2017-06-13
008 2007 bl uuuu u0uu1 u #d
100 1 $aRODRIGUES, J. E. L. F.
245 $aProdução de mudas de mandioca variedade paraiba, para a agricultura familiar, em Salvaterra - Marajó - Pará$bunidade demonstrativa.
260 $aBelém, PA: Embrapa Amazônia Oriental$c2007
300 $cNão paginado.
500 $a1 folder.
650 $aAmazonia
650 $aAdubação
650 $aAgricultura Familiar
650 $aMandioca
650 $aProdução Agrícola
650 $aVariedade
653 $aBrasil
653 $aPará
653 $aSalvaterra
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
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: |
20/09/2021 |
|
Data da última atualização: |
10/06/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
MORAIS, C. P. de; NICOLODELLI, G.; FOSCHINI, M. M.; SILVA, K. S. G. da; MAUAD, F. F.; MOUNIER, S.; MILORI, D. M. B. P. |
|
Afiliação: |
MILENE CORSO MITSUYUKI, CNPDIA; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA. |
|
Título: |
Total phosphorus determination in eutrophic tropical river sediments by laser-induced breakdown spectroscopy techniques. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Analytical Methods, v. 13, 2021. |
|
Páginas: |
77 - 83 |
|
ISSN: |
1759-9660 |
|
DOI: |
10.1039/d0ay02008g |
|
Idioma: |
Inglês |
|
Conteúdo: |
Total phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies. Two methods, based on single pulse (SP) and double pulse (DP) laserinduced breakdown spectroscopy (LIBS), were developed for determining TP in the sediment cores of Brazilian rivers upstream from the Barra Bonita reservoir. TP concentration in the sediments was determined by inductively coupled plasma optical emission spectrometry (ICP OES) on digested samples. Besides, a LIBS system operating in SP and DP modes was used to develop methods for TP quantification in sediment pellets. In LIBS, the most appropriate wavelength to measure P was 214.91 nm. The calibration curves showed correlation coefficients of 0.93 and 0.92 and limits of detection of 709 mg kg#1;1 and 349 mg kg#1;1 for SP and DP LIBS, respectively. The two proposed methods were validated and the average percentage errors were 14% and 10% for SP and DP LIBS, respectively. The ICP OES and SP and DP LIBS data showed that the most superficial layers of the Piracicaba River, all the sedimentary layers of the Tiete River, and the con ˆ fluence region present a high concentration of TP, according to the Brazilian sediment quality criterion. In conclusion, SP and DP LIBS were confirmed as promising alternative tools to traditional analytical methods for monitoring the TP content in the sediments that come from different hydrographic units. The proposed method using DP LIBS proved more sensitive than SP LIBS, but the SP LIBS method demonstrated enough precision for determining TP in eutrophic river sediments. MenosTotal phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies. Two methods, based on single pulse (SP) and double pulse (DP) laserinduced breakdown spectroscopy (LIBS), were developed for determining TP in the sediment cores of Brazilian rivers upstream from the Barra Bonita reservoir. TP concentration in the sediments was determined by inductively coupled plasma optical emission spectrometry (ICP OES) on digested samples. Besides, a LIBS system operating in SP and DP modes was used to develop methods for TP quantification in sediment pellets. In LIBS, the most appropriate wavelength to measure P was 214.91 nm. The calibration curves showed correlation coefficients of 0.93 and 0.92 and limits of detection of 709 mg kg#1;1 and 349 mg kg#1;1 for SP and DP LIBS, respectively. The two proposed methods were validated and the average percentage errors were 14% and 10% for SP and DP LIBS, respectively. The ICP OES and SP and DP LIBS data showed that the most superficial layers of the Piracicaba River, all the sedimentary layers of the Tiete River, and the con ˆ fluence region present a high concentration of TP, according to the Brazilian sediment quality criterion. In conclusion, SP and DP LIBS were confirmed as promising alternative tools to traditional analytical methods for monitoring the TP content in the sediments that come from different hydrographic units. The proposed method using DP LIBS proved more sensit... Mostrar Tudo |
|
Palavras-Chave: |
Chemical variable; Piracicaba River; SP and DP LIBS. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02401naa a2200265 a 4500
001 2134588
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a1759-9660
024 7 $a10.1039/d0ay02008g$2DOI
100 1 $aMORAIS, C. P. de
245 $aTotal phosphorus determination in eutrophic tropical river sediments by laser-induced breakdown spectroscopy techniques.$h[electronic resource]
260 $c2021
300 $a77 - 83
520 $aTotal phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies. Two methods, based on single pulse (SP) and double pulse (DP) laserinduced breakdown spectroscopy (LIBS), were developed for determining TP in the sediment cores of Brazilian rivers upstream from the Barra Bonita reservoir. TP concentration in the sediments was determined by inductively coupled plasma optical emission spectrometry (ICP OES) on digested samples. Besides, a LIBS system operating in SP and DP modes was used to develop methods for TP quantification in sediment pellets. In LIBS, the most appropriate wavelength to measure P was 214.91 nm. The calibration curves showed correlation coefficients of 0.93 and 0.92 and limits of detection of 709 mg kg#1;1 and 349 mg kg#1;1 for SP and DP LIBS, respectively. The two proposed methods were validated and the average percentage errors were 14% and 10% for SP and DP LIBS, respectively. The ICP OES and SP and DP LIBS data showed that the most superficial layers of the Piracicaba River, all the sedimentary layers of the Tiete River, and the con ˆ fluence region present a high concentration of TP, according to the Brazilian sediment quality criterion. In conclusion, SP and DP LIBS were confirmed as promising alternative tools to traditional analytical methods for monitoring the TP content in the sediments that come from different hydrographic units. The proposed method using DP LIBS proved more sensitive than SP LIBS, but the SP LIBS method demonstrated enough precision for determining TP in eutrophic river sediments.
653 $aChemical variable
653 $aPiracicaba River
653 $aSP and DP LIBS
700 1 $aNICOLODELLI, G.
700 1 $aFOSCHINI, M. M.
700 1 $aSILVA, K. S. G. da
700 1 $aMAUAD, F. F.
700 1 $aMOUNIER, S.
700 1 $aMILORI, D. M. B. P.
773 $tAnalytical Methods$gv. 13, 2021.
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. |
|
|
