Atividade acaricida dos óleos essencias de folhas e frutos de Xylopia sericea sobre o ácaro rajado (Tetranychus urticae Koch)

The essential oils of the leaves and fruits obtained by hydrodistillation of Xylopia sericea, collected in the restinga area of Pernambuco, were analyzed by GC (HP 5890 SERIES II) and GC/MS (HP 5890B SERIES II/ MSD 5971). A major part of the volatile components identified in the oils of fruits and leaves were monoterpenes and sesquiterpenes. Cubenol (57.43%) and alpha-epi-muurolol (26.09%) were the main compounds found in the leaves, whereas beta-pinene (45.59%) and alpha-pinene (17.18%) were the fruits major components. The acaricidal activity of the essential oils was evaluated for Tetranychus urticae. The oil of the leaves was more active than that of the fruits showing an LC50 value of 4.08 µL/L of air for a 72 h period.

Chlorophenols in tap water from wells and surface sources in Rio de Janeiro, Brazil: method validation and analysis

Two analytical methods were validated for determination of trichlorophenols, tetrachlorophenols and pentachlorophenol in drinking water. Limits of quantification were at least ten times lower than maximum permissible levels set by the Brazilian legislation, which are 200 ng mL-1 for 2,4,6-trichlorophenol and 9 ng mL-1 for pentachlorophenol. Chlorophenol levels were determined in tap water collected in the Municipality of Rio de Janeiro. 2,4,6-Trichlorophenol residues were detected in 36% of the samples, varying from 0.008 to 0.238 ng mL-1. All other analytes were below the limit of quantification. The validated methods showed to be suitable for application in routine quality control.

Aikaansaapa visionääri Ruotsin kirkossa

Kirjallisuusarvostelu

Indiferencia, ambivalencia y tipos de consentimiento: Agustín en el Scito te Ipsum de Abelardo

Agustín y Abelardo son frecuentemente puestos como modelos antagónicos de una ética de absolutos morales y una centrada en la intención. El presente artículo enfatiza más bien la coincidencia de ambos en dichos puntos, para defender en cambio que difieren en el tipo de acto interior decisivo para la evaluación moral y en la indiferencia o ambivalencia atribuida al acto exterior.

A solo per me l'infamia

Soitinnus: sopraano, baritoni, orkesteri.

No vecchio t'inganni

Soitinnus: sopraano, baritoni, orkesteri.

Dite alla giovine

Soitinnus: sopraano, baritoni, orkesteri.

Canto drammatico

Soitinnus: viulu.

Concerto grosso

Soitinnus: viulut (2), cembalo, piano, jousiorkesteri.