Size-segregated aerosol chemical composition from an agro-industrial region of São Paulo state, Brazil

Abstract Two propolis samples from Sao Paulo State were investigated by GC/MS. 39 compounds were identified, 8 being new for propolis. Both samples showed some similarities in their qualitative composition. In one of them, coumaric acid and its prenylated derivatives predominated, while in the other one triterpenic alcolhols were the main constituents.

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Fungicidal activity and constituents of Ageratum conyzoides essential oil from three regions in São Paulo state, Brazil

Arquivos do Instituto Biológico ◽

10.1590/1808-1657000482013 ◽

2015 ◽

Vol 82 (0) ◽

Cited By ~ 1

Author(s):

Renata Haddad Esper ◽

Edlayne Gonçalez ◽

Roberto Carlos Felicio ◽

Joana Darc Felicio

Keyword(s):

Chemical Composition ◽

Antifungal Activity ◽

Essential Oil ◽

Essential Oils ◽

Ecological Factors ◽

Sao Paulo ◽

São Paulo ◽

Ageratum Conyzoides ◽

Paulo State ◽

São Paulo State

The chemical composition and antifungal activity of the Ageratum conyzoidesessential oils, obtained from the leaves collected in Ibiúna (1), Ribeirão Pires (2) and Campinas (3) in the São Paulo state, Brazil, were investigated. The essential oils were obtained from A. conyzoidesleaves by hydrodestilation and analyzed by GC/MS. The chemical composition of the A. conyzoides oil collected in Ribeirão Pires and Ibiúna consisted mainly of precocene I and II. The essential oil from leaves collected in Campinas had only traces of precocene II and a highest proportion of precocene I, α-humulene and (E)-caryophyllene than the oils (1) and (2). The Aspergillus flavus growth was inhibited by essential oils (1) and (2) at 60 and 64%, respectively, and the oil (3) was inactive. On the other hand, the three essential oils inhibited the sporulation of the fungus for more than 120 days. The essential oils of leaves collected in sites that show similarities in the latitude, altitude and average temperatures, as Ribeirão Pires and Ibiúna, showed chemical composition and antifungal activity similar, either, which showed the importance of geo-ecological factors in production of metabolites of the plant.

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RAINWATER CHEMICAL COMPOSITION AND ANNUAL ATMOSPHERIC DEPOSITION IN SOROCABA (São Paulo State), Brazil

Brazilian Journal of Geophysics ◽

10.22564/rbgf.v31i1.242 ◽

2013 ◽

Vol 31 (1) ◽

pp. 5 ◽

Cited By ~ 5

Author(s):

Fabiano Tomazini da Conceição ◽

Maria Lúcia Pereira Antunes ◽

Vivian Andréia Angelucci ◽

Rodrigo Braga Moruzzi ◽

Guillermo Rafael Beltran Navarro

Keyword(s):

Chemical Composition ◽

Atmospheric Deposition ◽

Ionic Concentration ◽

Sao Paulo ◽

Sampling Point ◽

São Paulo ◽

Paulo State ◽

Fossil Fuel Burning ◽

São Paulo State ◽

Cement Factories

ABSTRACT: This work evaluated the rainwater chemical composition and the annual atmospheric deposition in Sorocaba (São Paulo State), Brazil. One sampling point was chosen and forty samples were collected between January and December 2006. The analyses were performed for pH, electrical conductivity, sodium, calcium, potassium, magnesium, sulphate, nitrate, phosphate, alkalinity and chloride. The rainwater pH varied from 5.20 to 6.40, being Ca 2 + the main ion responsible for controlling the rainwater pH. The ionic concentration decreases in the following order: Ca 2 + >Na+ > K+ >Mg 2 + for cations and SO 2 − 4 >HCO− 3 >NO− 3 >Cl− >PO 3 − 4 for anions. The annual atmospheric deposition appears to be controlled by the following sources: mining activities and cement factories (Ca 2 + and HCO− 3 ), agricultural activities (K+, NO− 3 and PO 3 − 4 ), soil dust (Na+, Mg 2 + and HCO− 3 ) and fossil fuel burning (SO 2 − 4 ). RESUMO: Este trabalho avaliou a composição química das águas pluviais e a deposição atmosférica anual na cidade de Sorocaba (SP). Um ponto de amostragem foi escolhido e quarenta amostras foram coletadas entre janeiro e dezembro de 2006. As amostras foram caracterizadas em relação ao pH, condutividade elétrica, sódio, cálcio, potássio, magnésio, sulfato, nitrato, fosfato, alcalinidade e cloreto. O pH das águas de chuva variou entre 5,20 e 6,40, sendo o Ca 2 + o principal íon responsável pelo controle do pH das águas de chuva. A concentração iônica diminui na seguinte ordem: Ca 2 + >Na+ >K+ >Mg 2 + para os cátions e SO 2 − 4 >HCO− 3 >NO− 3 >Cl− >PO 3 − 4 para os ânions. A deposição atmosférica anual parece ser controlada pelas seguintes fontes: minerações e fábricas de cimento (Ca 2 + e HCO− 3 ), atividades agrícolas (K+, NO− 3 e PO 3 − 4 ), poeira de solo (Na+, Mg 2 + e HCO− 3 ) e queima de combustíveis fósseis (SO 2 − 4 ).Palavras-chave: Sorocaba, composição da água de chuva, poluição atmosférica.

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