Patrícia Nunes Alves | Univercidade De Paulista Unip (original) (raw)

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Papers by Patrícia Nunes Alves

Research paper thumbnail of Seasonal distribution of polar organic compounds in the urban atmosphere of two large cities from the North and South of Europe

Atmospheric Environment, 2007

Polar organic species, including n-alkanols, sterols, anhydrosugars, n-alkanoic acids, n-alkenoic... more Polar organic species, including n-alkanols, sterols, anhydrosugars, n-alkanoic acids, n-alkenoic acids and dicarboxylic acids were quantified to typify the composition of fine (PM 2.5 ) and coarse (PM 10-2.5 ) aerosols collected simultaneously at roadside and background sites in Oporto (Portugal) and Copenhagen (Denmark) during separate month-long intensive summer and winter campaigns. As a general trend, both cities exhibit roadside average concentrations higher than their correspondent urban background levels. The polar organics are more abundant in the fine fraction, exhibiting a seasonal pattern with high winter concentrations and low summer loads. Aerosols from both cities showed typical distributions of nalkanols and n-alkanoic acids in the ranges C 12 -C 28 and C 8 -C 28 , respectively. The oC 20 homologues, usually attributed to kitchen emissions, vehicular exhausts and microbial origins, dominated the fatty acid fraction. Linear alcohols were mainly represented by higher molecular weight homologues from vegetation waxes. Molecular tracer species for wood smoke (e.g. levoglucosan, mannosan and resinic acids) were found to contribute significantly to the urban aerosol, especially in winter. Ratios between these tracers indicated different biofuel contributions to the atmospheric particles of the two cities. Secondary constituents from both biogenic (e.g. pinonic acid) and anthropogenic precursors (e.g. phthalic and benzoic acids) were detected in both cities and seasons. r

Research paper thumbnail of DIREITO NAS ORGANIZAÇÕES

www.planalto.gov.br -Código Tributário Nacional (CTN) 1ª Aula -01/08/2013 TRIBUTO prestação pecu... more www.planalto.gov.br -Código Tributário Nacional (CTN) 1ª Aula -01/08/2013 TRIBUTO prestação pecuniária compulsória em moeda ou cujo valor nela se possa exprimir instituída em lei que não seja sanção por ato ilícito cobrado mediante atividade administrativa plenamente vinculada.

Research paper thumbnail of Seasonal distribution of polar organic compounds in the urban atmosphere of two large cities from the North and South of Europe

Atmospheric Environment, 2007

Polar organic species, including n-alkanols, sterols, anhydrosugars, n-alkanoic acids, n-alkenoic... more Polar organic species, including n-alkanols, sterols, anhydrosugars, n-alkanoic acids, n-alkenoic acids and dicarboxylic acids were quantified to typify the composition of fine (PM 2.5 ) and coarse (PM 10-2.5 ) aerosols collected simultaneously at roadside and background sites in Oporto (Portugal) and Copenhagen (Denmark) during separate month-long intensive summer and winter campaigns. As a general trend, both cities exhibit roadside average concentrations higher than their correspondent urban background levels. The polar organics are more abundant in the fine fraction, exhibiting a seasonal pattern with high winter concentrations and low summer loads. Aerosols from both cities showed typical distributions of nalkanols and n-alkanoic acids in the ranges C 12 -C 28 and C 8 -C 28 , respectively. The oC 20 homologues, usually attributed to kitchen emissions, vehicular exhausts and microbial origins, dominated the fatty acid fraction. Linear alcohols were mainly represented by higher molecular weight homologues from vegetation waxes. Molecular tracer species for wood smoke (e.g. levoglucosan, mannosan and resinic acids) were found to contribute significantly to the urban aerosol, especially in winter. Ratios between these tracers indicated different biofuel contributions to the atmospheric particles of the two cities. Secondary constituents from both biogenic (e.g. pinonic acid) and anthropogenic precursors (e.g. phthalic and benzoic acids) were detected in both cities and seasons. r

Research paper thumbnail of DIREITO NAS ORGANIZAÇÕES

www.planalto.gov.br -Código Tributário Nacional (CTN) 1ª Aula -01/08/2013 TRIBUTO prestação pecu... more www.planalto.gov.br -Código Tributário Nacional (CTN) 1ª Aula -01/08/2013 TRIBUTO prestação pecuniária compulsória em moeda ou cujo valor nela se possa exprimir instituída em lei que não seja sanção por ato ilícito cobrado mediante atividade administrativa plenamente vinculada.