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At least 253 records · Page 14Linked to original sources
PubMed1983

[Lead and cadmium contamination of foods and feeds from selected areas of the Erfurt district. 4. Lead in vegetables grown in culture centers of the Erfurt region].

For the purpose of determining the effect of heavy metal emissions of a great town on the lead and cadmium levels of vegetables that are of relevance to food supply, we analyzed 193 samples of vegetables from the important vegetable-growing centre of Erfurt during a 3-year period. With regard to the main wind direction and the infrastructure of the town, the samples were collected at four different areas under vegetable. Apart from a single exception, the lead and cadmium contents were inferior to the maximum tolerances provided by the regulation concerning the contents of foreign substances in foods, the metal contents of leaf vegetables being higher than those of brassicaceous plants. Vegetable samples from areas with heavier emission burdens showed somewhat higher metal contents. In contrast to this, the cadmium contents did not exhibit such differences. The highest lead and cadmium contents were found in spinach. To elucidate the effect of the washing and blanching techniques used in industrial processing, 23 spinach preserves were analyzed in addition; as expected, the heavy metal contents were reduced by these techniques. In summary, our investigations evidence that the main vegetables cauliflower, white cabbage, red cabbage, savoy cabbage, as well as lettuce and spinach (grown in the district of Erfurt) contribute but little to total food contamination if we consider the amounts consumed on an average.

Brassica↗
PubMed1978

Some effects of ingested petroleum on seawater-adapted ducks (Anas platyrhynchos).

Male Pekin ducks adapted to seawater and maintained under sheltered conditions (27 degrees C) in the laboratory may consume considerable volumes of petroleum without showing overt symptoms of distress. Under these conditions, birds consuming petroleum-contaminated food have shown a persistent hyperphagia; this was most apparent among those given food contaminated with South Louisiana crude oil, least apparent among birds given No. 2 fuel oil, and intermediate among those that consumed food contaminated with Kuwait crude oil. When maintained at 27 degrees C, some mortality occurred among the birds given South Louisiana crude oil (22.2%) and No. 2 fuel oil (35.7%), whereas none of the freshwater- and seawater-maintained birds given uncontaminated food and none of the birds given Kuwait crude oil died during this period. Following their exposure to chronic mild cold stress (3 degrees C), mortality occurred in all groups of birds; the birds that had consumed petroleum-contaminated food tended to die earlier and in larger numbers than either the seawater- or freshwater-maintained control birds. These effects suggest that the mortality in all groups of birds was due primarily to the additive effects of a series of nonspecific stressors. Thus, at autopsy, birds that had succumbed to the effects of these stressors frequently showed adrenal hypertrophy and severe involution of the lymphoepithelial tissues. The consumption of petroleum-contaminated food seemed to constitute only one of a series of environmental stressors, and, among birds that were already exposed to stressors such as hypertonic drinking water and persistent cold, the ingestion of petroleum seemed to render them more vulnerable and death frequently ensued.

Animals↗
PubMed1998

Regulatory action criteria for filth and other extraneous materials. II. Allergenic mites: an emerging food safety issue.

Four species of food-contaminating mites have recently been reported to have caused IgE-mediated allergic reactions, including anaphylaxis, in persons who consumed mite-contaminated foods. The mite species are the American house dust mite, Dermatophagoides farinae Hughes (Acarina: Pyroglyphidae); the scaly grain mite, Suidasia sp. prob. pontifica Oudemans (Acarina: Suidasiidae), an acarid mite, Thyreophagus entomophagus Portus & Gomez (Acarina: Acaridae); and the mold mite, Tyrophagus putrescentiae (Schrank) (Acarina: Acaridae). Allergenic mites are an emerging food safety issue as ingested allergens in mite-contaminated food.

Animals↗
PubMed1981

[Comparative studies on the contamination of foods by cancerogenic hydrocarbons in the Soviet Union and in the GDR. Part 2. Contribution to the method (author's transl)].

The principle of the method used in the Central Institute of Nutrition of the Academy of Sciences of the GDR, in the Oncological-Scientific Centre in Moscow, and in the Petrov Institute of Oncology in Leningrad, for the determination of cancerogenic hydrocarbons including the reference substance benzo[a]pyrene in foods is described and compared with other methods. The results of a comparative study among the institutes mentioned are in a good agreement. The coefficients of variation range between 3.5 and 18.9 percent, depending of the samples. These methodical presumptions enable an international cooperation to recognize the sources and the amounts of food contamination by benzo[a]pyrene.

Benzopyrenes↗