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brassica_oleracea_capitata_group [2015/09/21 08:39]
andreas angelegt |
brassica_oleracea_capitata_group [2020/06/10 14:44]
andreas |
| B. oleracea L. var. capitata L. f. rubra (L.) Thell - red cabbage, **Rotkohl** \\ | B. oleracea L. var. capitata L. f. rubra (L.) Thell - red cabbage, **Rotkohl** \\ |
| B. oleracea L. var. sabauda L. - Savoy cabbage, **Wirsing** | B. oleracea L. var. sabauda L. - Savoy cabbage, **Wirsing** |
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| "Dimethyl trisulfide was identified as a major aroma component in cooked Brassicaceous vegetables. A mechanism for dimethyl trisulfide formation from precursors known to be present in cabbage is proposed. No evidence was found to indicate that new sulfur compounds develop as cooking time increases. It is proposed that the strong unpleasant aroma which is characteristic of overcooked Brassicaceous vegetables is due to the gradual loss of pleasant volatile components and resultant “unmasking” of the unpleasant sulfur components." \\ | "Dimethyl trisulfide was identified as a major aroma component in cooked Brassicaceous vegetables. A mechanism for dimethyl trisulfide formation from precursors known to be present in cabbage is proposed. No evidence was found to indicate that new sulfur compounds develop as cooking time increases. It is proposed that the strong unpleasant aroma which is characteristic of overcooked Brassicaceous vegetables is due to the gradual loss of pleasant volatile components and resultant “unmasking” of the unpleasant sulfur components." \\ |
| [Identification of dimethyl trisulfide as a major aroma component of cooked brassicaceous vegetables., Maruyama, F.T., Journal of Food Science, 35(5), 1970, 540-543] | [Identification of dimethyl trisulfide as a major aroma component of cooked brassicaceous vegetables., Maruyama, F.T., Journal of Food Science, 35(5), 1970, 540-543] |
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| | Not allyl isothiocyanate (AITC), but 1-cyano-2,3-epithiopropane (CEP) was the primary volatile in all dichlormethane extracts of white cabbage (six cultivars). \\ |
| | [Kyung, K. H., et al. "1‐Cyano‐2, 3‐epithiopropane as the primary sinigrin hydrolysis product of fresh cabbage." Journal of food science 60.1 (1995): 157-159] |
| | [[https://fbns.ncsu.edu/USDAARS/Acrobatpubs/P221-253/p251.pdf]] |
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| "In cabbage, glucosinolates such as sinigrin are hydrolyzed by plant myrosinase to allyl isothiocyanate (AITC), allyl cyanide, and, in the presence of an epithiospecifier protein, 1-cyano-2,3-epithiopropane (CEP). Isothiocyanates have been implicated in the cancer-protective effects of Brassica vegetables. The effect of processing on the hydrolysis of glucosinolates was investigated in cabbage. Cabbage was steamed or microwaved for six time durations over 7 min. Glucosinolate concentrations were slightly reduced after microwave cooking ( | "In cabbage, glucosinolates such as sinigrin are hydrolyzed by plant myrosinase to allyl isothiocyanate (AITC), allyl cyanide, and, in the presence of an epithiospecifier protein, 1-cyano-2,3-epithiopropane (CEP). Isothiocyanates have been implicated in the cancer-protective effects of Brassica vegetables. The effect of processing on the hydrolysis of glucosinolates was investigated in cabbage. Cabbage was steamed or microwaved for six time durations over 7 min. Glucosinolate concentrations were slightly reduced after microwave cooking ( |
| [Changes in glucosinolate concentrations, myrosinase activity, and production of metabolites of glucosinolates in cabbage (Brassica oleracea var. capitata) cooked for different durations., Rungapamestry, V., Duncan, A.J., Fuller, Z., Ratcliffe, B., Journal of agricultural and food chemistry, 54(20), 2006, 7628-7634] | [Changes in glucosinolate concentrations, myrosinase activity, and production of metabolites of glucosinolates in cabbage (Brassica oleracea var. capitata) cooked for different durations., Rungapamestry, V., Duncan, A.J., Fuller, Z., Ratcliffe, B., Journal of agricultural and food chemistry, 54(20), 2006, 7628-7634] |
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| | {{:allylitc.jpg|allyl isothiocyanate}} allyl isothiocyanate |
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| | "From the sensory test results, freshly shredded cabbage and low pH (pH 3.3 and 4.6) samples had significantly less off odor, lower total aroma intensity and higher fresh aroma than high pH (pH 6.4 and 7.4) samples. In the SIFT-MS results, the desirable cabbage odor, allyl isothiocyanate, formation was higher in lower pH samples, than higher pH samples. Off odors (dimethyl sulfide, dimethyl disulfide, dimethyl trisulfide and methyl mercaptan) were formed in lower concentrations in low pH samples than high pH samples. Low pH samples formed less undesirable and more desirable volatile compounds overall. Higher concentrations of all volatile compounds |
| | were formed at 25 °C than 4 °C except from allyl isothiocyanate. Allyl isothiocyanate concentration was higher at 25 °C only on day 0, after that, there was a rapid decrease during the storage and it was higher in 4 °C samples. The degradation of the compound at 4 °C was slower when compared to 25 °C; therefore, characteristic fresh cabbage aroma was maintained better at lower temperature. High temperature is not suitable for cabbage |
| | storage, since undesirable aroma compound formation is high, loss of desirable aroma occurs rapidly, and microbial growth occurs at very early stage of storage." \\ |
| | [Akpolat, H., & Barringer, S. A. (2015). The effect of pH and temperature on cabbage volatiles during storage. Journal of food science, 80(8), S1878-S1884] |
