Biochemical and bioactive phytonutrients changes in tissues of two cultivars of fresh-cut cassava in stick form under refrigerated storage

The aim of this study was to evaluate the effects of fresh-cut in stick form of two cassava cultivars on their biochemical and antioxidant characteristics, at two harvest times. The fresh cut cassava sticks were packaged in polypropylene, maintained at 5±1ºC, with 90±5% relative humidity for 12 days. The concentration of carotenoids, total soluble phenolic compounds and the activity of phenylalanine ammonia lyase and antioxidant capacity were significantly higher for the sticks of cultivar 'Amarela' cassava than for the sticks of cultivar 'Cacau'. The concentrations of carotenoids, total soluble phenolic compounds, and the activity of phenylalanine ammonia lyase and antioxidant capacity were all significantly greater when harvested at 14-month of age. There was a significant increase in the activity of phenylalanine ammonia lyase during the 12 days of storage at 5ºC. However, there was a decrease in total carotenoids, soluble phenolic compounds, and in the antioxidant capacity of the two cultivars

Technical means using by Customs administration of the Czech Republic to detection of narcotic and psychoactive drugs.

Autor v úvodu své práce krátce hodnotí vývoj problematiky užívání a zneužívání omamných a psychotropních látek na našem území a popisuje jednotlivé technické prostředky používané v minulosti a současnosti k jejich vyhledávání a detekci. Cílem práce je vymezení způsobu použití technických prostředků v praxi, vhodnosti jejich použití v konkrétních podmínkách výkonu služby a nové trendy ve vývoji a využití těchto prostředků