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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
24/03/2022 |
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Data da última atualização: |
24/03/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TORRES, J. A.; CRUZ, J. C. da; NOGUEIRA, A. E.; SILVA, G. T. S. T. da; OLIVEIRA, J. de; RIBEIRO, C. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
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Título: |
Role of Cu0 -TiO2 interaction in catalyst stability in CO2 photoreduction process. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of Environmental Chemical Engineering, v. 10, 107291, 2022. |
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ISSN: |
2213-3437 |
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DOI: |
https://doi.org/10.1016/j.jece.2022.107291 |
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Idioma: |
Inglês |
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Conteúdo: |
The application of copper-based semiconductors for CO2 photoreduction has been limited by the poor stability of these catalysts in aqueous solutions due to parallel oxidation reactions. Thus, here we discussed the role of the Cu0 -TiO2 interaction in catalyst stability, where the semiconductor acts as a charge separator and support for Cu0 . Cu0 nanoparticles were deposited on the surface of TiO2 by reducing copper nitrate using a sodium borohydride solution. The metallic copper presents a higher selectivity in CO production (82.32%), while pure iO2 presents a selectivity for CH4 (62.44%). However, with the heterostructure formation, the photocatalysts activity increases and the selectivity changes with copper amount variation over TiO2. In addition to the obtained C1 products (CH4, CO, and CH3OH), products containing two or more carbons (C2+) were also generated, such as acetic acid (C2H4O2), acetone (C3H6O), and isopropanol (C3H8O). H2 was also produced, although the selectivity for products derived from the photoreduction of CO2 was significantly greater. The sample TiO2/Cu 30% was significantly stable, which indicated the importance of an adequate heterojunction in the catalyst activity. These results demonstrate the synergistic effect between different copper species over TiO2, in which both materials play a role in the catalytic event. |
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Palavras-Chave: |
Heterostructure; Selectivity; Stability. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02096naa a2200241 a 4500
001 2141233
005 2022-03-24
008 2022 bl uuuu u00u1 u #d
022 $a2213-3437
024 7 $ahttps://doi.org/10.1016/j.jece.2022.107291$2DOI
100 1 $aTORRES, J. A.
245 $aRole of Cu0 -TiO2 interaction in catalyst stability in CO2 photoreduction process.$h[electronic resource]
260 $c2022
520 $aThe application of copper-based semiconductors for CO2 photoreduction has been limited by the poor stability of these catalysts in aqueous solutions due to parallel oxidation reactions. Thus, here we discussed the role of the Cu0 -TiO2 interaction in catalyst stability, where the semiconductor acts as a charge separator and support for Cu0 . Cu0 nanoparticles were deposited on the surface of TiO2 by reducing copper nitrate using a sodium borohydride solution. The metallic copper presents a higher selectivity in CO production (82.32%), while pure iO2 presents a selectivity for CH4 (62.44%). However, with the heterostructure formation, the photocatalysts activity increases and the selectivity changes with copper amount variation over TiO2. In addition to the obtained C1 products (CH4, CO, and CH3OH), products containing two or more carbons (C2+) were also generated, such as acetic acid (C2H4O2), acetone (C3H6O), and isopropanol (C3H8O). H2 was also produced, although the selectivity for products derived from the photoreduction of CO2 was significantly greater. The sample TiO2/Cu 30% was significantly stable, which indicated the importance of an adequate heterojunction in the catalyst activity. These results demonstrate the synergistic effect between different copper species over TiO2, in which both materials play a role in the catalytic event.
653 $aHeterostructure
653 $aSelectivity
653 $aStability
700 1 $aCRUZ, J. C. da
700 1 $aNOGUEIRA, A. E.
700 1 $aSILVA, G. T. S. T. da
700 1 $aOLIVEIRA, J. de
700 1 $aRIBEIRO, C.
773 $tJournal of Environmental Chemical Engineering$gv. 10, 107291, 2022.
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Embrapa Instrumentação (CNPDIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
09/01/2023 |
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Data da última atualização: |
09/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
SILVA, L. de F.; ALKIMIM, E. R.; BARREIRO, P. R. R. M.; LEICHTWEIS, B. G.; SILVA, A. C. A.; SILVA, R. A. da; SOUSA, T. V.; NASCIMENTO, M.; CAIXETA, E. T. |
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Afiliação: |
LETÍCIA DE FARIA SILVA, UNIVERSIDADE FEDERAL DE VIÇOSA; EMILLY RUAS ALKIMIM, UNIVERSIDADE FEDERAL TRIÂNGULO MINEIRO; PEDRO RICARDO ROSSI MARQUES BARREIRO, UNIVERSIDADE FEDERAL DE VIÇOSA; BRUNO GRESPAN LEICHTWEIS, UNIVERSIDADE FEDERAL DE VIÇOSA; ANA CAROLINA ANDRADE SILVA, UNIVERSIDADE FEDERAL DE VIÇOSA; RUANE ALICE DA SILVA, UNIVERSIDADE FEDERAL DE VIÇOSA; TIAGO VIEIRA SOUSA, INSTITUTO FEDERAL DO TRIÂNGULO MINEIRO; MOYSÉS NASCIMENTO, UNIVERSIDADE FEDERAL DE VIÇOSA; EVELINE TEIXEIRA CAIXETA MOURA, CNPCa. |
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Título: |
Genome-wide association study of plant architecture and diseases resistance in Coffea canephora. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Euphytica, v. 218, jun. 2022. |
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Páginas: |
13 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Genome wide association studies (GWAS) have been traditionally used for the identification and comprehension of loci associate with phenotypic variation and identification of markers useful in genetic breeding programs. The GWAS was used in this work to identify chromosomal regions with significant associations with the main agronomic trait of Coffea canephora. The studied population comprised 165 clones of the two varietal groups Conilon and Robusta and intervarietal hybrids from crosses between these groups. Coffee trees were genotyped using 17 885 single nucleotide polymorphisms (SNP) markers distributed throughout the genome and phenotyped with eight morpho agronomic traits. Significant SNPs were found associated with plant height, diameter of the canopy projection, vegetative vigor, rust incidence, and cercosporiosis incidence. SNP marker distribution was quite uniform, with few gaps in the centromeric regions, with 27.72% and 9.09% present in intergenic and coding regions, respectively; the latter led to 70% amino acid exchanges and 30% silent mutations. Candidate genes, in which SNP markers were inserted, were identified and their function was related to traits of plant architecture and coffee diseases resistance. SNPs with significant associations were found in all chromosomes of the species, especially in chromosomes 0, 2, 6, 9, and 11. This methodology was efficient in C. canephora populations and helped identify several SNPs in candidate genes involved in important biological processes of coffee. Therefore, these SNPs can be used as strategies to accelerate the coffee breeding program through molecular marker assisted selection. MenosGenome wide association studies (GWAS) have been traditionally used for the identification and comprehension of loci associate with phenotypic variation and identification of markers useful in genetic breeding programs. The GWAS was used in this work to identify chromosomal regions with significant associations with the main agronomic trait of Coffea canephora. The studied population comprised 165 clones of the two varietal groups Conilon and Robusta and intervarietal hybrids from crosses between these groups. Coffee trees were genotyped using 17 885 single nucleotide polymorphisms (SNP) markers distributed throughout the genome and phenotyped with eight morpho agronomic traits. Significant SNPs were found associated with plant height, diameter of the canopy projection, vegetative vigor, rust incidence, and cercosporiosis incidence. SNP marker distribution was quite uniform, with few gaps in the centromeric regions, with 27.72% and 9.09% present in intergenic and coding regions, respectively; the latter led to 70% amino acid exchanges and 30% silent mutations. Candidate genes, in which SNP markers were inserted, were identified and their function was related to traits of plant architecture and coffee diseases resistance. SNPs with significant associations were found in all chromosomes of the species, especially in chromosomes 0, 2, 6, 9, and 11. This methodology was efficient in C. canephora populations and helped identify several SNPs in candidate genes involved in importan... Mostrar Tudo |
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Thesagro: |
Coffea Canephora. |
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Thesaurus NAL: |
Disease resistance; Phenotypic variation; Plant breeding. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02457naa a2200277 a 4500
001 2150796
005 2023-01-09
008 2022 bl uuuu u00u1 u #d
100 1 $aSILVA, L. de F.
245 $aGenome-wide association study of plant architecture and diseases resistance in Coffea canephora.$h[electronic resource]
260 $c2022
300 $a13 p.
520 $aGenome wide association studies (GWAS) have been traditionally used for the identification and comprehension of loci associate with phenotypic variation and identification of markers useful in genetic breeding programs. The GWAS was used in this work to identify chromosomal regions with significant associations with the main agronomic trait of Coffea canephora. The studied population comprised 165 clones of the two varietal groups Conilon and Robusta and intervarietal hybrids from crosses between these groups. Coffee trees were genotyped using 17 885 single nucleotide polymorphisms (SNP) markers distributed throughout the genome and phenotyped with eight morpho agronomic traits. Significant SNPs were found associated with plant height, diameter of the canopy projection, vegetative vigor, rust incidence, and cercosporiosis incidence. SNP marker distribution was quite uniform, with few gaps in the centromeric regions, with 27.72% and 9.09% present in intergenic and coding regions, respectively; the latter led to 70% amino acid exchanges and 30% silent mutations. Candidate genes, in which SNP markers were inserted, were identified and their function was related to traits of plant architecture and coffee diseases resistance. SNPs with significant associations were found in all chromosomes of the species, especially in chromosomes 0, 2, 6, 9, and 11. This methodology was efficient in C. canephora populations and helped identify several SNPs in candidate genes involved in important biological processes of coffee. Therefore, these SNPs can be used as strategies to accelerate the coffee breeding program through molecular marker assisted selection.
650 $aDisease resistance
650 $aPhenotypic variation
650 $aPlant breeding
650 $aCoffea Canephora
700 1 $aALKIMIM, E. R.
700 1 $aBARREIRO, P. R. R. M.
700 1 $aLEICHTWEIS, B. G.
700 1 $aSILVA, A. C. A.
700 1 $aSILVA, R. A. da
700 1 $aSOUSA, T. V.
700 1 $aNASCIMENTO, M.
700 1 $aCAIXETA, E. T.
773 $tEuphytica$gv. 218, jun. 2022.
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