The current study evaluates the Pulsed Electric Field (PEF) technique for extraction of polyphenols from plants Rosa canina, Calendulaofficinalis and Castanea sativa. These are traditionally used both preparation therapeutic decoctions aromatization beverages (alcoholic or not). Pulses 10 ?s duration were to apply electric field intensities ranging 1.2 2.0 kV cm?1. period phenomenon was set 1 m...

Ceratitis capitata (Wiedemann), Ceratitis rosa Karsch, and Ceratitis cosyra (Walker) (Diptera: Tephritidae) are pests potentially associatedwith avocado (Persea americanaMill.) in South Africa. The aim of the studywas to determine the host status of ÔHassÕ avocado to these tephritid pests over 4 yr. Unpunctured harvested avocadowas exposed to fruit ßies in the laboratory under no-choice conditi...

Three different brands of Rose hip (Rosa canina L.) tea were extracted with water, ethanol (EtOH), methanol (MeOH), and aqueous mixtures (50%, v/v) by ultrasound-assisted extraction (UAE) and Soxhlet methods. Total phenolic content was determined according to the Folin-Ciocalteu method. The results were presented by means of the extract yields and total phenolic contents, expressed in gallic ac...

The relative abundance of indigenous and invasive frugivorous fruit flies (Diptera: Tephritidae) was evaluated spatially and temporally along an altitudinal transect between 581-1650 m in the Uluguru Mountains near Morogoro, Tanzania. The polyphagous invasive fruit fly Bactrocera invadens Drew, Tsuruta, and White and the indigenous fruit fly Ceratitis rosa Karsch show a similar temporal pattern...

Rosehip is one of the richest sources vitamin C, and jam made from it tastes delicious. In this work, content food colors E160a (lycopene) E160d (?-carotene) was determined, as well antioxidant capacity these products. By applying UV-Vis spectrophotometric method using Lambert-Beer law, a system two linear equations with unknowns set up, which used to determine concentrations for E160d. The lyc...

Comparative analysis of development and survivorship of two geographically divergent populations of the Natal fruit fly Ceratitis rosa Karsch designated as Ceratitis rosa R1 and Ceratitis rosa R2 from Kenya and South Africa were studied at seven constant temperatures (10, 15, 20, 25, 30, 33, 35 °C). Temperature range for development and survival of both populations was 15-35 °C. The development...