Cabbage ascorbic acid

Beet greens, cabbage, cauliflower, chives, kohlrabi, lemon, mustard, orange, papaya, spinach, strawberry, watercress Low ascorbic acid content (25-50 milligrams/ 00 grams)... 

Ascorbic acid was isolated from cabbage, lemon juice, and adrenal glands by Szent-Gyorgy in 1928, and identified as the antiscorbutic factor by Waugh and King in 1932. Its structure was established by Haworth and coworkers in 1933, and the same year Haworth, in Birmingham, and Reichstein, in Switzerland, succeeded in synthesizing the vitamin. 

Ascorbate oxidase was discovered in 1928 by Szent-Gyorgyi (13), who found that certain plant tissues could catalyze the aerobic oxidation of ascorbic acid, and in 1930 14) he postulated the existence of a specific enzyme in cabbage leaves. In 1940 Lovett-Janison and Nelson (15) and Stotz (16) could confirm the existence of ascorbate oxidase and its... 

Another goitrogenic compound in cabbage is thiocyanate ion (107) which results from breakdown of indolylmethyl isothiocyanate produced from the corresponding glucosinolate, glucobrassicin (97,106,108) (reaction G). The 5-hydroxymethylindole thus produced can dimerize to 3,3 -diindolylmethane or form a complex (ascorbigen) with ascorbic acid (perhaps a novel type of feedback inhibition of ascorbate-dependent... 

Samples, 2 to 5 g, of white cabbage were extracted with 5 to 6 volumes of 75 mM phosphate buffer at pH 6.0 (52 mM ascorbic acid/ascorbate mixture and 0.1% v/v 2-mercaptoethanol) under nitrogen. The sample was extracted by microwave for 1 min at 75% power. The samples were extracted for another 10 in a boiling-water bath. 

VITAMIN C (L-ascorbic acid) Vitamin C plays an important role as a redox-catalyst in metabolism in teeth, bone, cartilage and parenchyma-tissue. Vitamin C occurs in several fruits such as an rose hips (Cynosbatifructus), Black currant. Sallow-thorn (Hippophae rhamnoides), Citrus-fruits, Paprika, Potato, Cabbage, and Parsley. 

Ascorbic Aero Distribution in Normal Guinea Pigs (Given Ascorbic Acid or Cabbage)... 

The presence of volatile constituents which are alleged to inhibit the enzymatic destruction of ascorbic acid in cabbage and other green vege-... 

In his earlier experiments Szent-Gyorgyi (1928) found that ascorbic acid (AA) was rapidly oxidized on the addition of hydrogen peroxide but that, on standing, the ascorbic acid was regenerated. This latter observation could not be repeated if the juice was boiled. Since that date evidence has accumulated that AA and DHA are interconvertible in plant tissues. In some fruits, notably apples, the proportion of DHA to that of AA is high in the early stages of development but decreases as the fruit approaches maturity (Zilva et al., 1938). The direct formation of ascorbic acid from DHA was demonstrated in cabbage (Rubin et al., 1937) and in poplar leaves (Mapson and Barker, 1948) after DHA had been injected or fed to these tissues. 

Ascorbic acid Cabbage, cucumber, yeiiow squash Ascorbic acid oxidase (AAO) Oxygen electrode/carbon paste electrode... 

However, unheated and heat-treated crude caraway seed extracts did not affect the concentrations of dimethyl disulfide and dimethyl trisulfide in model systems over an extended period (5 hr). Thus, it appeared that the overall suppression of methanethiol-related compounds in sauerkraut by caraway seed (Table I) was dependent on methanethiol which has been shown to be a precursor for both dimethyl disulfide and dimethyl trisulfide under oxidative conditions (18,25). Recently, Chin and Lindsay (25) have shown that methanethiol was readily converted to dimethyl disulfide and dimethyl trisulfide in an aerobic cabbage model system (pH 6.3) consisting of 1 ppm hydrogen sulfide, 450 ppm ascorbic acid and 4 ppm Fe(m). 

---