An increased intake of fruits and vegetables has been shown to be associated with reduced risk of cancer. In epidemiological studies, supplements of β-carotene, which is abundant in fruits and vegetables, were not found to be beneficial in reducing the incidence of lung cancer in high-risk groups. Epoxycarotenoids are abundant in nature. 5,6-Epoxy-β-carotene was much more active than β-carotene...

A total of 3,182 subjects (1,239 males and 1,943 females) aged from 39y to 79y, were recruited from the inhabitants of a rural area in Japan who participated in health check-up programs from 1988 to 1995. During the 10.5 year follow-up, 287 deaths (175 males and 112 females) from all causes, 134 (81 males and 53 females) from cancer of all sites, 31 from lung cancer, 21 from colorectal cancer, ...

• A UV-C treatment of 6 kJ m ?2 greatly enhanced the flavonoid accumulation in red bell peppers. UV-C+UV-B increased by ?94 % carotenoid content and UVB + C are good abiotic elicitors biosynthesis. Rutin is highly (?70 %) after UV treatments. stresses have beneficial effects plants inducing synthesis secondary metabolites when low doses were applied. The aim this study was to evaluate effect (B...

Introduction Available evidence on carotenoid biosynthesis indicates that a general pathway is utilized in all carotenogenic systems, at least in the primary stages (Jensen 1965). The sequential dehydrogenation of the colorless Co precurs~rs to the colored carotenes has been extensively studied in the photosynthe ... t":'"ic----........bacteria (Stanier 1959) and appears to follow the Porter-Li...

A method is described for the simultaneous measurement of probucol, retinol, tocopherols, lycopene, and carotenes by reverse phase high performance liquid chromatography. A high sensitivity was achieved by use of a microbore column and by monitoring the effluent at the optimum wavelengths of each substance with a diode array detector. The detection limits were lycopene 0.5 ng; alpha-carotene, b...

Direct and reliable spectrophotometric method for assaying total carotenes (TC) in margarines with the minimum of sample manipulation is proposed. For the first time saponification step used in determination of carotenes in margarines was omitted leading to a substantial cost saving and reduction of time needed to complete the analysis. The resulting analytical procedure is characterized in det...