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At least 73 records · Page 4Linked to original sources
PubMed1975

[On the phenolic acids of vegetables. II. Hydroxycinnamic acids and hydroxybenzoic acids of fruit and seed vegetables (author's transl)].

Fruits of solanaceae (tomatoes, eggplant, and sweet peppers) almost exclusively contain hydroxycinnamic acid derivatives with caffeic acid dominating. Fruits of cucurbitaceae (cucumbers, melons, pumpkins, and zucchini) are extraordinary, because they show very low concentrations of phenolic acids (up to 10 mg/kg) accumulated in the peels. Peas and broad beans have relatively small contents of phenolic acids too. Their husks show like beans considerable concentrations of hydroxycinnamic acid derivatives with dominating p-coumaric acid. In the group of hydroxybenzoic acids derivatives of salicylic, gentisic and vanillic acid could be determined frequently, but mostly as traces.

Caffeic Acids↗
PubMed1975

[On the phenolic acids of vegetables. III. Hydroxycinnamic acids and hydroxybenzoic acids of root vegetables (author's transl)].

In carrots, celeriac, scorzoneras, and horse radish caffeic acid, in small radishes p-coumaric acid, in beets ferulic acid and in radishes probably ferulic acid is dominating after hydrolysis. The contents of phenolic acids in the roots are much smaller than in the corresponding leaves. Carrots, small radishes, horse radish and partially scorzoneras show higher concentrations of phenolic acids in outer tissue layers. In contrary to hydroxycinnamic acid derivatives the contents of hydroxybenzoic acid derivatives (p-hydroxybenzoic, vanillic, salicylic and gentisic acid) mostly were small. Partially hydroxycoumarins (aesculetin and scopoletin) identified.

Caffeic Acids↗
PubMed1989

The assessment of air and soil as contributors of some trace metals to vegetable plants. II. Translocation of atmospheric and laboratory-generated cadmium aerosols to and within vegetable plants.

Radish, spinach and lettuce were grown in the field on 109Cd-labelled soil. Efficient transfer to the plant was observed with concentration factors [Cd concn. in plant (dry wt) divided by Cd concn. in soil (dry wt)] of between 0.30 and 2.00. Soil uptake of Cd accounted for only 69-64% of Cd in the plants, the remainder arising from atmospheric deposition. By fumigating radish, lettuce and carrot with Cd aerosol in a wind tunnel and harvesting and analysis subsequent to further growth, translocation of Cd to non-exposed parts of plants was demonstrated. The percentage of deposited Cd which is translocated in the wind-tunnel-fumigated plants is small (0.6-4%), but is larger in plants grown in the field (28-36%) or in a laboratory growth cabinet (12-35%).

Aerosols↗
PubMed1989

[Changes in the levels of nitrates and nitrites in vegetables and vegetable products and vitamin C in white sauerkraut].

The authors demonstrated that during souring nitrates disappear from the white sauerkraut as a mean rate of 42% after 7 days and 23% after 30 days (souring in spring 1987) and by 29% and 77% of the initial level after 7, 30 and 90 days (souring in winter-spring period 1988). After 7 days the level of l-ascorbic acid rose from a mean value of 52 mg/kg to 300 mg/kg, and after 90 days this level fell to one-half of the initial value. No significant changes were noted in the content of nitrites. A decrease of nitrates and increase of nitrite content was found in freshly obtained carrot juice (with a juice extractor). The effect of time and temperature of juice storage on the concent of nitrates and nitrites was studied.

Ascorbic Acid↗