RESUMO
The essential oil composition from Sideritis tragoriganum has been investigated by capillary gas chromatography and gas chromatography-mass spectrometry. Among the 47 identified mono- and sesquiterpenes, alpha-bisabolol is the most prominent component. Correlation analysis of essential oil components from this population of S. tragoriganum with two other geographically distinct populations revealed the existence of unrelated chemical types.
Assuntos
Cromatografia Gasosa/métodos , Lamiaceae/química , Espectrometria de Massas/métodos , Óleos Voláteis/químicaRESUMO
Volatile compounds from the aerial parts of Teucrium lepicephalum Pau and Teucrium carolipaui C. Vicioso ex Pau, both belonging to the Teucrium pumilum aggregate, were analysed by capillary GC and GC-MS. From the common and specific compounds (mono- and sesquiterpenes) of the two taxa, chemical characterization was carried out and taxonomic relationships were assessed. Application of the cluster and k-means discriminant analysis shows a differential chemical relationship between T. lepicephalum and Teucrium carolipaui.
Assuntos
Lamiaceae/química , Óleos Voláteis/química , Cromatografia Gasosa/métodos , Lamiaceae/classificação , Especificidade da Espécie , VolatilizaçãoRESUMO
The performance of aeration, photodecomposition and biological degradation processes as methods to reduce molinate contamination levels in effluent water from rice fields was studied. Aeration produced a molinate dissipation of 84%, as against 22% without aeration. Application of UV-light to clean water solutions achieved a molinate photodecomposition of 96% in 24 h. Maximal degradation obtained in algal cultures was 55% in 20 days and 78% in 40 days. In micro-organism cultures, kept in darkness and with a continuous flow of aqueous solution of molinate and inorganic salts, a degradation of 97% was achieved.
