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토마토의 생육과정에 따른 성분 변화I : Tomatine 분석을 중심으로
김동석,小机信行,한재숙,김미향 한국식생활문화학회 2004 韓國食生活文化學會誌 Vol.19 No.6
This was aim to study the changes of components by different parts and maturity of tomato. We found that orally fed tomatine which induced a significant reduction in cholesterol in hamster in contrast to potato glycoalkaloids, the safety of tomatine was supported by our observation that pickled green tomatoes consumed widely in many countries has a high tomatine content. The tomatoes harvested during the first stage(10 days after flowering) contained tomatine 6333.49 ㎍ per 100 g and dehydrotomatine and α-tomatine in a ratio of about 1:13.8. The tomatine content then decreased by about 85% during stage 2(20 days after flowering) an dehydrotomatine contene dropped to a value near zero during stage 3, 4. It then the tomatine content dropped to a value near zero during the final stage(50 days after flowering). With respect to health benefits at all stages of maturity, unripe tomato contain chlorophyll and α-tomatine should consumed.
Tsuchida, H.,Kozukue, N.,Han, G.P.,Choi, S.H.,Levin, C.E.,Friedman, M. Elsevier 2010 Postharvest biology and technology Vol.58 No.2
To elucidate the cause of reported pyruvate accumulation in chilled stored cucumbers (Cucumis sativus L.) cv. 'Toppugurin', we have examined differences in the extent of incorporation of acetate-1,2-<SUP>14</SUP>C into the tricarboxylic acid (TCA) cycle and the specific activity of the enzyme citrate synthase between healthy and chilling-injured cucumber tissues stored in the dark for 0, 3, 6 and 12 d at 1<SUP>o</SUP>C or 20<SUP>o</SUP>C. Radioactive tracing, gas chromatography, and enzyme analysis suggest that the incorporation of acetate into citrate, the distribution of organic acids in the tricarboxylic acid cycle, and the specific activity of citrate synthase in the cold-storage (chilling-injured) cucumber tissues differed from those in the healthy tissues. The observed decrease in citrate synthase activity may be the cause of the observed increase in pyruvate accumulation in the chilling-injured cucumber fruit tissue compared to tissues stored at 20<SUP>o</SUP>C. The results also suggest that the increased formation of pyruvate and reduced activity of citrate synthase during cold storage observed in the present study could serve as indicators (biomarkers) of stress-induced changes in chilled cucumbers. Possible mechanisms of the described effects are discussed.
조리 방법에 따른 호박 중의 클로로필과 카로틴 함량 변화
김동석,小机信行,김미향 동아시아식생활학회 2004 동아시아식생활학회지 Vol.14 No.6
This study was performed to investigate changes of chlorophyll and carotene contents by cooking methods and parts of pumpkin(zucchini, green pumpkin, and sweet pumpkin). The highest chlorophyll content of 3-parts(peel, cortex, and seed), all of pumpkin was peel part for chlorophyll contents by cooking methods of all kinds of pumpkin. It was the highest when cooked by non-batter frying. Carotene was relativity stable with cooking. But in case of sweet pumpkin, steaming cooking method was reduced carotene contents. β-carotene of zucchini, green pumpkin, and sweet pumpkin was higher than standard contents.
토마토의 생육과정에 따른 성분 변화 II : Ascorbic acid, Chlorophyll, Carotene, Lycopene 분석을 중심으로
김동석,小机信行,한재숙,김미향 한국식생활문화학회 2004 韓國食生活文化學會誌 Vol.19 No.6
This was aim to study the changes of components by different parts and maturity of tomato. Tomato include the green pigment chlorophyll, the yellow pigment -carotene. the red pigment lycopene and the other component. These colors of tomatoes are reported to have important functional roles to promote health in human. The main objective of this study was to define changes in the content of the four tomato maturation that is ascorbic acid, chlorophyll, carotene, lycopene. A ascorbic acid contents of tomato fruits was the highest at 50th day. Chlorophyll contents of tomatoes fruits was the highest at 10th days after flowering. α-carotene contained low-quantity while all growth period. β-carotene contained the highest at 50th days after flowering, 1036.97㎍. Lycopene contained the highest at 50th days after flowering, 5800㎍.
감자의 가공제품 종류와 조리방법에 따른 Glycoalkaloid의 함량
김정애,小机信行,한재숙 한국조리과학회 2004 한국식품조리과학회지 Vol.20 No.1
The potato tubers of Solanum tuberosum L. contain potato glycoalkaloids(PGA), a class of naturally occurring toxicants. The primary constituents of this class of compounds in potatoes are α-chaconine and α-solanine. The purpose of this study was to examine the effects of various cooking methods on the PGA contents in the common Korean potato Irish Cobbler variety and those in commercially produced patato products consumed in Korea. After cooking, most potatoes showed big decreases in their PGA contents compared to the uncooked samples, with the exception of baked potatoes, which maintained 90.86% of their PGA contents. The PGA levels in boiled and blanched potatoes were reduced by 91.68 and 84.17%, respectively. However, the levels in samples boiled in 1% salted water were only reduced by 52.10%. Potatoes fried and sauteed in oil had their PGA contents reduced to 49.42 and 49.51% of their original levels. The reductions in the relative PGA contents by cooking method were in the order boiling〉blanching〉boiling with 1% NaCl〉steaming〉sauteing〉frying〉microwaving〉baking. The highest remaining PGA content of the potato products in Korea was in potato chips, at 69.57㎎/100g, but made with imported potatoes.