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 | Acesso ao texto completo restrito à biblioteca da Embrapa Clima Temperado. Para informações adicionais entre em contato com cpact.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
05/12/2023 |
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Data da última atualização: |
05/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BUENO, V. R.; GOSTEL, M. R.; HEIDEN, G. |
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Afiliação: |
VINICIUS R. BUENO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; MORGAN R. GOSTEL, BOTANICAL RESEARCH INSTITUTE OF TEXAS; GUSTAVO HEIDEN, CPACT. |
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Título: |
The spiraling story of Tyleropappus and a new name for Calea |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Phytotaxa, v. 618, n. 2, p. 133-148, 2023. |
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ISSN: |
1179-3163 |
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DOI: |
https://doi.org/10.11646/phytotaxa.622.1.5 |
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Idioma: |
Inglês |
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Conteúdo: |
Tyleropappus was described in 1931 by Greenman and is characterized by its spiral, alternate leaves and epaleaceous receptacle. Throughout its taxonomic history, the genus was placed into the tribes Helenieae and Neurolaeneae, often treated as the sister genus of Geissopappus, which is currently a synonym of Calea. Later, Tyleropappus was synonymized with Calea; however, when its synonymization was proposed, the sole species in the genus, T. dichotomus, had not been synonymized under a previously described species nor properly transferred to Calea. Ongoing taxonomic studies in Neurolaeneae have provided opportunities to clarify the challenging taxonomic history of this monotypic genus. We confirm the synonymy of Tyleropappus in Calea; however, we recognize T. dichotomus as a distinct species that should be accepted in Calea. Nonetheless, the name C. dichotoma already exists, and is a synonym of C. ternifolia. Therefore, we propose the new name C. spiralis to accommodate this species, which is morphologically similar to C. linearifolia. The former can be distinguished from the latter by the spiral, alternate (vs. decussate) arrangement of leaves, receptacle epaleaceous (vs. oligopaleaceous) and cypselae hirsute (vs. glabrous). We also provide a detailed description of the species, the first map of its geographic occurrence, an illustration with diagnostic characters, and the first taxonomic key for the Nana clade of Calea. |
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Palavras-Chave: |
Calea. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01962naa a2200181 a 4500
001 2159166
005 2023-12-05
008 2023 bl uuuu u00u1 u #d
022 $a1179-3163
024 7 $ahttps://doi.org/10.11646/phytotaxa.622.1.5$2DOI
100 1 $aBUENO, V. R.
245 $aThe spiraling story of Tyleropappus and a new name for Calea$h[electronic resource]
260 $c2023
520 $aTyleropappus was described in 1931 by Greenman and is characterized by its spiral, alternate leaves and epaleaceous receptacle. Throughout its taxonomic history, the genus was placed into the tribes Helenieae and Neurolaeneae, often treated as the sister genus of Geissopappus, which is currently a synonym of Calea. Later, Tyleropappus was synonymized with Calea; however, when its synonymization was proposed, the sole species in the genus, T. dichotomus, had not been synonymized under a previously described species nor properly transferred to Calea. Ongoing taxonomic studies in Neurolaeneae have provided opportunities to clarify the challenging taxonomic history of this monotypic genus. We confirm the synonymy of Tyleropappus in Calea; however, we recognize T. dichotomus as a distinct species that should be accepted in Calea. Nonetheless, the name C. dichotoma already exists, and is a synonym of C. ternifolia. Therefore, we propose the new name C. spiralis to accommodate this species, which is morphologically similar to C. linearifolia. The former can be distinguished from the latter by the spiral, alternate (vs. decussate) arrangement of leaves, receptacle epaleaceous (vs. oligopaleaceous) and cypselae hirsute (vs. glabrous). We also provide a detailed description of the species, the first map of its geographic occurrence, an illustration with diagnostic characters, and the first taxonomic key for the Nana clade of Calea.
653 $aCalea
700 1 $aGOSTEL, M. R.
700 1 $aHEIDEN, G.
773 $tPhytotaxa$gv. 618, n. 2, p. 133-148, 2023.
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Embrapa Clima Temperado (CPACT) |
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Cutter |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
08/06/2017 |
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Data da última atualização: |
11/07/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CADEMARTORI, P. H. G. de; STAFFORD, L.; BLANCHET, P.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I. |
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Afiliação: |
Pedro Henrique Gonzalez de Cademartori, Doutorando da UFPR; Luc Stafford, Departement de Physique, Universite de Montreal; Pierre Blanchet, NSERC; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Graciela Ines Bolzon de Muniz, UFPR. |
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Título: |
Enhancing the water repellency of wood surfaces by atmospheric pressure cold plasma deposition of fluorocarbon film. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
RSC Advances, v. 7, n. 46, p. 29159-29169, Jun. 2017. |
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DOI: |
10.1039/c7ra03334f |
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Idioma: |
Inglês |
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Conteúdo: |
In this study, fluorocarbon thin filmsweredepositedonthe surfaceofwhite spruce andBrazilian cedarwoods via atmospheric pressure dielectric barrier discharge in the afterglow mode with octafluoropropane gas. A pretreatment with oxygen plasma was introduced before the thin film deposition to determine if this plasma condition could increase the wood nano/micro roughness, helping to improve the hydrophobicity of the surface. The optimal conditions of water repellency for both woods were examined in terms of their resistance to aging in controlled conditions. The water contact angle measurements showed a hydrophobic surface with a stable angle for both woods. X-ray photoelectron spectroscopy reveals the presence of CF, CF2 and CF3 functional groups after the Ar/C3F8 plasma, especially for longer treatments. The open-air system of the plasma reactor leads to the simultaneous fluorination and incorporation of oxygen-containing groups. The pre-treatment of oxygen plasma increases the wood roughness; however, the chemical attachment of oxygen molecules is more significant, negatively affecting the degree of repellency of the plasma-coated woods. On the other hand, the fluorocarbon deposition increases the wood roughness and creates a hydrophobic surface simultaneously. Even with partial defluorination after aging, both plasma-coated woods retain a similar degree of water repellency, which partially avoid chemical reorganization of their surface due to environmental exposure. |
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Palavras-Chave: |
Atmospheric plasma; Filme de fluorcarbono; Hydrophobic surface; Molhabilidade; Plasma a frio; Plasma atmosférico; Plasma treatment; Superfície hidrofóbica; Surface modification; Wetting. |
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Thesagro: |
Madeira. |
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Thesaurus NAL: |
Wood treatment. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/160655/1/2017-Washington-RCSA-Enhancing.pdf
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Marc: |
LEADER 02486naa a2200325 a 4500
001 2070623
005 2017-07-11
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1039/c7ra03334f$2DOI
100 1 $aCADEMARTORI, P. H. G. de
245 $aEnhancing the water repellency of wood surfaces by atmospheric pressure cold plasma deposition of fluorocarbon film.$h[electronic resource]
260 $c2017
520 $aIn this study, fluorocarbon thin filmsweredepositedonthe surfaceofwhite spruce andBrazilian cedarwoods via atmospheric pressure dielectric barrier discharge in the afterglow mode with octafluoropropane gas. A pretreatment with oxygen plasma was introduced before the thin film deposition to determine if this plasma condition could increase the wood nano/micro roughness, helping to improve the hydrophobicity of the surface. The optimal conditions of water repellency for both woods were examined in terms of their resistance to aging in controlled conditions. The water contact angle measurements showed a hydrophobic surface with a stable angle for both woods. X-ray photoelectron spectroscopy reveals the presence of CF, CF2 and CF3 functional groups after the Ar/C3F8 plasma, especially for longer treatments. The open-air system of the plasma reactor leads to the simultaneous fluorination and incorporation of oxygen-containing groups. The pre-treatment of oxygen plasma increases the wood roughness; however, the chemical attachment of oxygen molecules is more significant, negatively affecting the degree of repellency of the plasma-coated woods. On the other hand, the fluorocarbon deposition increases the wood roughness and creates a hydrophobic surface simultaneously. Even with partial defluorination after aging, both plasma-coated woods retain a similar degree of water repellency, which partially avoid chemical reorganization of their surface due to environmental exposure.
650 $aWood treatment
650 $aMadeira
653 $aAtmospheric plasma
653 $aFilme de fluorcarbono
653 $aHydrophobic surface
653 $aMolhabilidade
653 $aPlasma a frio
653 $aPlasma atmosférico
653 $aPlasma treatment
653 $aSuperfície hidrofóbica
653 $aSurface modification
653 $aWetting
700 1 $aSTAFFORD, L.
700 1 $aBLANCHET, P.
700 1 $aMAGALHAES, W. L. E.
700 1 $aBOLZON DE MUNIZ, G. I.
773 $tRSC Advances$gv. 7, n. 46, p. 29159-29169, Jun. 2017.
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Embrapa Florestas (CNPF) |
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