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제안 방법
- To date, there have been no reports on the effects of soil pH on the nutritional components of CC. In this study, 13 cultivars were tested to distinguish the effects of cultivar specificity from those of the soil pH, thus providing information useful to food scientists and plant breeders.
- Calcium and iron are often used in dietary supplements for women, and they are also available from leafy vegetables (Wardlaw, 1999). In this study, the moisture levels and contents of reducing sugar, pectin, cellulose, protein, fat, vitamin C, vitamin E, glucosinolates, Ca and other minerals in CC were measured for the determination of CC quality.
대상 데이터
- The two groups were sampled after confirmation of uniformity in color, shape, and size of the mature plants, based on criteria given by the Korea Seed & Variety Service. For each trial, a cultivar was grown in eight replicates, and three plants were randomly sampled. For glucosinolates and minerals, only one replication was used.
- Table 5. Glucosinolates in 13 Chinese cabbage cultivars from acidified and neutral soil.
- Table 1. The 13 Chinese cabbage cultivars (Brassica rapa ssp. campestris) used in this study.
- Thirteen cultivars of B. rapa originating from China were obtained from the Korea Brassica Genome Resource Bank (Daejeon, Korea) (Table 1). They were cultivated on neutral soil in a side-open greenhouse and on acidified soil at Chungnam National University Farm, Daejeon, Korea, from August to October of 2007; the two farms are about 40 km apart.
데이터처리
- 0 was used for statistical analysis. For average comparison between two groups, one-way ANOVA were performed. Pearson correlation coefficients were calculated for the correlations between dependent variables.
- For average comparison between two groups, one-way ANOVA were performed. Pearson correlation coefficients were calculated for the correlations between dependent variables.
이론/모형
- Crude protein; The quantity of crude protein was measured by the method of Bradford (Bradford, 1976). The CC leaves were ground with liquid nitrogen in a mortar and pestle.
- Reducing sugar; The reducing sugar contents were measured by the dinitrosalicylic acid (DNS) method (Miller, 1959). For DNS solution, 5 g of 3,5-dinitrosalicylic acid was dissolved in 100 mL of 2 N NaOH with heating and then 150 g of Rochell salt (potassium sodium tartrate tetrahydrate) were added along with sufficient distilled water to bring the final volume to 500 mL.
- The mixtures were incubated for 20 h at 37℃ and centrifuged (29,000 × g, 5 min). The reducing sugar contents in supernatants were measured by the DNS method at 540 nm (Kim et al., 1986).
- Vitamin C; Vitamin C was measured by the 2,4-dinitrophenyl hydrazine (DNP) method (AOAC, 1995). The CC leaves (1 g) were homogenized with 10 mL of metaphosphoric acid (5%, v/v).
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