• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.14 no.1
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• pp.23-29
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• 2008

The market sales of fresh-cut fruit and vegetables have grown rapidly in recent decades as a result of changes in consumer trend. Choosing the proper pretreatment of fruit and vegetables before minimally processing is very important because appearance is the most fundamental factors affecting the quality of fresh-cut products. This review describes the biochemical bases for color changes of fruit and vegetables including browning, discoloration, and color changes of carrots and alliums. Understanding pathway of pigments in minimally processed fruit and vegetable and preventing the way of color change should be emphasized for successive packaging system. This review also describes pretreatment of fresh-cut fruit and vegetables to improve the prolonging the shelf-life and maintenance of its qualities.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06c
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• pp.344-353
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• 1996

A fundamental study was conducted to obtain the basic data involved in nondestructive quality evaluation of the fruit and vegetables. An experimental equipment for ultrasonic propagation characteristics of the fruit and vegetables such as radish , carrot , potato, and apple was set up and also power spectrum analysis system of an ultrasonic wave through the fruit and vegetables was set up. The velocity and attenuation of ultrasonic wave through the tissue specimens from the fruit and vegetables were measured and analyzed. The elastic modulus and density by the mechanical method currently used were compared with those using by ultrasonic method. The ultrasonic tranit time was almost linearly increased with the length of the specimens and attenuation of ultrasonic was mainly affected by the internal flbrous structure of the products. The regression equation was derived from the highly correlated experimental variables.

• Korean journal of food and cookery science
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• v.21 no.3 s.87
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• pp.380-398
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• 2005

There are various bioactive compounds in vegetables which are called 'phytochemicals' They are extranutritional constituents that typically occur in small quantities. They are being intensively studied to evaluate their effects on health. These biologically active compounds vary widely in chemical structure and function and are grouped accordingly, carotenoids, flavonoids, isothiocyanates, allyl compounds, indoles, isoflavones and saponins, etc. Traditionally used vegetables are defined, and their trivial names, biological functions and traditional and oriental medicinal effects are investigated in this study. Much scientific research needs to be conducted before we can begin to make science-based dietary recommendations. Despite this, there is sufficient evidence to recommend consuming vegetables rich in bioactive compounds, especially for the prevention of cancer.

• Journal of Korean Home Economics Education Association
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• v.27 no.4
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• pp.93-107
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• 2015

This study aimed to compare the eating habit, preferences, intake frequency, nutrition knowledge, and self efficacy of vegetables between middle and high school students in Busan. Subjects were 550 middle school and 560 high school students. The survey was conducted by questionnaire in May 2015. The results are as follows. About 68% of adolescents in Busan have eaten a variety of vegetables from a child. Less than 50% of them ate all vegetable dishes in school foodservice and ate three kinds of vegetable dishes at home. 40% of them did not like vegetables independent of gender and schools. They have low preferences for vegetables. More than 2/3 of them have rarely eaten green vegetables a month or twice. They have eaten more frequently white than green vegetables. They have eaten frequently yellow vegetables, but seldom purple or black vegetables. Middle school students have eaten more vegetables than high school students. Adolescents in Busan have low nutrition knowledge about vegetables. Middle school students have higher self efficacy of vegetables than high school students. Conclusively, adolescents in Busan have undesirable eating habit, low preference, and low nutrition knowledge of vegetables. Middle school students have more desirable eating habit, higher preference, more frequent intake, and higher self efficacy of vegetables than high school students. Therefore differentiated education is needed by middle and high school. It is needed urgently, especially vegetables targeted education for high school students.

• The Korean Journal of Food And Nutrition
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• v.30 no.1
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• pp.41-50
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• 2017

This study developed a vegetable preference increase program that can be applied at the Center for Children's Foodservice Management (CCFM) for children in child-care facilities and kindergarten and the training performance was evaluated by 192 5-year old children. Teachers considered 'disliked food' ($3.23{\pm}0.85/out$ of 5) as the most serious nutritional problem and typical disliked food was 'vegetables' (54.2%). Based on this finding, to increase the preference for vegetables, a five-phase education program was developed. In this program, each phase was composed of activities to increase children's interest in vegetables by using each sense out of the five senses. Center dieticians had visited and conducted the program in 12 facilities. By using an illustration assessment tool, the training performance was evaluated by comparing the children's knowledge level and their preference changes in vegetables. Consequently, as examined by 10 questions on the knowledge of vegetables, trained children's (in total 192) knowledge of vegetables had considerably increased (p<0.01, p<0.001), and their preference for 15 out of the 16 vegetables, except for carrots, also showed a considerable preference increase after the training (p<0.01, p<0.001). Therefore, this program is considered to have contributed to reducing disliked vegetable eating behaviors.

• Journal of the East Asian Society of Dietary Life
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• v.19 no.1
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• pp.9-16
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• 2009

This study investigated vegetable buying behavior with the subjects of 250 housewives living in Gyeongju. According to the results, they usually buy the following vegetables by order of frequency: cucumbers (152 times), hot peppers (142 times), lettuce (140 times), and spinach (134 times). The intake frequency of fresh vegetables was 2 to 3 times per week as 50.0% responded so. All respondents considered freshness most importantly when buying vegetables regardless of age. They usually buy vegetables at traditional markets, and they think the markets are suitable for buying fresh vegetables regardless of age. And the result of analyzing relation among vegetable's vitamin C and the colors or kinds of vegetables selected by age was not statistically significant. About the improvements to use vegetables, respondents in the 20's chose useful information, ones in the 30's to 40's said diverse recipes, ones in the 50's went for the quality improvement, and ones in the 60's or more emphasized stable prices. They answered that they received nutrition information of vegetables mainly from TV or magazines, newspapers, and mass media whereas subjects in the 60's or more said they got it from neighbors or friends. For housewives to get and practice nutritional knowledge, it is necessary to develop recipes in consideration of nutritional balance and convenience and provide them with constant education of nutrition through lifelong education facilities.

• Korean journal of food and cookery science
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• v.21 no.2 s.86
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• pp.201-208
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• 2005

This study was conducted to investigate the effect of blanching time on changes of hazardous factors in leafy vegetables treated by systemic and non-systemic pesticides. Changes of hazardous factors in leafy vegetables treated by systemic and non-systemic pesticides showed the same trend. In changes of microbial counts in leafy vegetables according to blanching time, the total plate count was significantly decreased by blanching and total coliforms were not detected in any of the vegetables. In traceable metal contents of fresh vegetables before washing, the levels in spinach, chard and whorled mallow were 0.042, 0.040 and 0.032 ppm for Pb, 0.020, 0.023 and 0.019 ppm for Cd, and 0.029, 0.034 and 0.030 ppm for As, respectively. Therefore, the levels of Pb, Cd and As in leafy vegetables were very traceable and in terms of food safety there was no problem. On the other hand, the traceable metal contents in leafy vegetables did not show significant difference by blanching and blanching time. Nitrate contents in fresh vegetables before washing were detected at traceable levels. The nitrate contents in spinach, chard and whorled mallow were significantly decreased by $22\%,\;17\%\;and\;14\%$ after blanching time of 5 min, 9 min and 10 min, respectively.

• Food Science and Preservation
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• v.11 no.1
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• pp.57-62
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• 2004

Pesticide contaminants content was determined about both general vegetables marketed at Garak-dong market and organic vegetables cultivated at Hongchun, Kangwon-do. The vegetables were kale, Angelica Keiskei Koidz, celery, lettuce and Allium fistulosum. Pesticide contaminants content of 5 kinds general vegetables were 93.5, 57.7, 112.4, 76.5, 65.2 ppm, respectively. This residual levels were showed 75.35, 70.68, 78.49, 70.49％ about standard level, respectively. Angelica Keiskei Koidz was not able to calculate the residual level because the standard level was not established in Korea. In contrast, the residual levels of organic vegetables were determined 36.4, 21.0, 42.9, 29.1, 25.1ppm, respectively. This level was about 30％ of standard level, 38.93, 36.40, 38.17, 38.04, 38.50％ of general vegetables. At the result, pesticide contaminants content of organic vegetables was less than 40％ of general vegetables.

• Preventive Nutrition and Food Science
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• v.22 no.3
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• pp.216-222
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• 2017

Antioxidant rich green leafy vegetables including garden spinach leaf, water spinach leaf, Indian spinach leaf, and green leaved amaranth were selected to evaluate the effects of water boiling and oil frying on their total phenolic content (TPC), total flavonoid content (TFC), reducing power (RP), and antioxidant capacity. The results revealed that there was a significant increase in TPC, TFC, and RP in all the selected vegetables indicating the effectiveness of the cooking process on the antioxidant potential of leafy vegetables. Both cooking processes enhanced significantly (P<0.05) the radical scavenging ability, especially the oil fried samples showed the highest values. There is a significant reduction in the vitamin C content in all the vegetables due to boiling and frying except in the Indian spinach leaf. However, the present findings suggest that boiling and frying can be used to enhance the antioxidant ability, by increasing the bioaccessibility of health-promoting constituents from the four vegetables investigated in this study.

• Journal of Nutrition and Health
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• v.29 no.1
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• pp.89-96
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• 1996

This study was conducted to analyze dietary fiber content of 113 common Korean foods. Content of total dietary fiber(TDF) in vegetables, mushrooms, fruite, and seaweeds was determined by enzymatic-gravimetric method developed by Prosky et al. and adopted by AOAC. The average TDF content of the foods analyzed was 3.62$\pm$2.09% for green vegetables, 5.90$\pm$7.61% for light vegetables, 14.27$\pm$18.11% for mushrooms, 3.02$\pm$4.48% for fruits, and 11.39$\pm$12.68% for seaweeds. The foods containing the highest TDF values in the food groups were boiled radish leaves(10.84%) in green vegetables, dried braken(38.36%) in light vegetables, dried juda's ear(18.18%) in mushrooms except dried manna lichen(52.87%), dried persimon(17.73%) in fruits and dried sea mustard(37.77%) in seaweeds. Dried Seaweeds such as sea mustard (37.77%), sea tangle(29.30%), and laver(31.36%) were good sources of dietary fiber. When we consider the health and therapeutic benefits of dietary fiber, it is recommended to continue to consume traditional Korean diet which are mainly composed of vegetables rather than animal foods and to increase consumption of dried mushrooms and seaweeds which contain high content of TDF.