Food

  2008 MAY 12 - (VerticalNews.com) -- "Urban and rural population exposure to ochratoxin A (OTA) in central zone of Portugal was investigated in three places: Coimbra, Verride and Ereira. The analytical method proposed for the determination of ochratoxin A involved extraction with chloroform-orthopliosphoric acid, cleanup through an irnmunoaffinity column (IAC), high performance liquid chromatography (HPLC) with spectrofluorimetric detection (FD) for separation and identification of ochratoxin A, and confirmation with HPLC-FD after OTA methylation in serum," scientists in Coimbra, Portugal report ...read more

  2008 MAY 12 - (VerticalNews.com) -- "Modified gum acacia, produced from acacia gum by a process analogous to the production of modified food starch, was tested for mutagenicity in the microbial reverse mutation assay. The assay employed a wide range of dose levels, both with and without metabolic activation," scientists in the United States report.

  "Test results gave no indication that modified gum acacia possessed any mutagenic potential. The acute oral toxicity of modified gum acacia was determined in two studies employing Sprague-Dawley((R)) rats, and the LD50 values were found to be > 2000 mg/kg. The primary dermal irritation potential of modified gum acacia was evaluated in rabbits by the Draize method. Test results indicated that modified gum acacia was slightly irritating by the Environmental Protection Agency (EPA) classification but not a primary irritant by Consumer Product Safety Commission (CPSC) guidelines. The subchronic toxicity of modified gum acacia was examined in Sprague-Dawley rats fed diets containing 0%, 1%, 2.5%, and 5% modified gum acacia for 13 weeks. No dose-related effects on survival, growth, hematology, blood chemistry, organ weights, or pathologic lesions were observed," wrote D. Schmitt and colleagues, Exponent, Inc ...read more

  2008 MAY 12 - (VerticalNews.com) -- "Convincing evidence suggest that a plant-based diet is associated with a reduced risk of several chronic diseases, but the mechanisms for this association is not fully elucidated. The transcription factor nuclear factor kappa B (NF-kappa B) plays a critical role in cellular stress-, immune- and inflammatory responses," researchers in Oslo, Norway report.

  "Also, NF-kappa B is identified as a promising therapeutic target both in cancer and chronic inflammation. We used monocytes stably transfected with a NF-kappa B-luciferase reporter construct in a screening of plant extracts for NF-kappa B modulators. Our aim was to identify dietary components which could induce basal NF-kappa B activity to produce a preconditioning effect, or inhibit induction of disease related NF-kappa B activity. When screening 34 dietary plants for their ability to induce basal NF-kappa B activity or inhibit lipopolysaccharide induced NF-kappa B activity we observed that 23 dietary plant extracts induced basal NF-kappa B activity, while 15 extracts attenuate induced NF-kappa B activation. These results indicate that dietary plants contain compounds that efficiently modulate NF-kappa B activity," wrote I. Paur and colleagues, University of Oslo, Medical Department ...read more