• Horticultural Science & Technology
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• v.32 no.6
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• pp.771-780
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• 2014

In this study, we aimed to understand the effect of sorbitol and salicylic acid (SA) on quality and functional food contents of tomato. Sole or combined application of sorbitol and SA in different concentrations (0.5 mM and 1.0 mM) greatly improved the characteristics of tomato, such as red color tone, soluble solid content, hardness and weight as well as increasing the functional food contents such as of lycopene, anthocyanins and vitamins in comparison with the control. The cyanidin content increased approximately 52-61% and delphinidin contents also increased 20-24% and 39-41% in tomato plants treated with SA alone and sorbitol with SA, respectively. Furthermore, the sole or combined application of sorbitol and SA also increased the vitamin $B_1$ and C contents. In particular, vitamin C content was increased 1.2-fold by treatment with sorbitol alone and was increased 2-fold by SA treatment compared to the control. In the sorbitol with SA treatments, vitamin C content was approximately 4-fold increased relative to control plants.

• Journal of Life Science
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• v.24 no.12
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• pp.1316-1324
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• 2014

Most beta-glucans obtained from various fruit bodies of mushrooms and mushroom mycelial cultures have high-molecular weight glycoproteins, conjugated with beta-glucans. We report that isoflavone-conjugated glycolproteins (designated as gluvone) were isolated and exhibited stronger anticarcinogenic activities. Agaricus blazei mycelia (ABM) was cultured in a liquid medium containing soybean flakes for 14 days. The liquid culture was autolyzed by incubating at $53^{\circ}C$ (pH 5.5) for 3 h. A crude glycoprotein (CGP) fraction with a cytotoxic effect on a mouse ascite cancer cell line (S-180) and a human breast cancer cell line (MCF-7) was isolated from the autolyzed ABM cultures by 80% ethanol treatment. Gluvone was isolated from the CGP with Sephadex G-75 column chromatography. It exhibited a stronger anticancer effect than CGP against the S-180 cell-induced female ICR mouse ascites carcinogenesis. Gluvone with 9,400 daltons was identified as a glycoprotein conjugated with isoflavone. According to HPLC and GC analysis, in conjunction with $^1H$-NMR spectral analysis, it contained 60% carbohydrates (glucose, fructose, and ribose), 31% protein, and 2% isoflavone (daidzein and genistein), which is a novel material. These results indicate that a strong anticarcinogenic gluvone was isolated from the autolyzed product of a submerged liquid culture of ABM, suggesting that autolysis could be a useful tool to produce antitumor agents.

• Korean Journal of Agricultural and Forest Meteorology
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• v.20 no.2
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• pp.183-189
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• 2018

This study was carried out to investigate the effect of plant growth and production of tomato (Lycopersicon Esculentum Mill cv. Tefunis) according to the water content of non-recycled rockwool culture in high-rise tomato greenhouse. Daily irrigation amount was 3.8 times higher in the irrigation control by Integrated Solar Radiation (ISR) than in the Frequency Domain Reflectometry (FDR) sensor. Water content of ISR and FDR was 90-95 and 60-65%, respectively. Plant height and weight of tomato fruit was 1.2-1.9 times longer and 1.2-2.0 times heavier in the ISR than in the FDR sensor, respectively. No significantly differed to sugar content of tomato by treatments. Marketable fruits were the higher 1.3 times in the ISR compared with the FDR sensor. Cracking percentage in the ISR was also the higher 2.0 times compared with FDR sensor. Therefore, Irrigation control by ISR was appropriate to improve of plant growth and production of tomato with non-recycled rockwool culture in greenhouse during long-term cultivation.

• Korean Journal of Soil Science and Fertilizer
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• v.41 no.3
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• pp.153-157
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• 2008

This study was conducted to select some effective organic materials for supplying mineral nutrients at the later red-pepper growing period under organic farming system, and to evaluate the application effect. Nutritional characteristics of organic materials, nitrogen release pattern during liquefying the selected organic materials, and crop growth were examined. Among 18 organic materials, meals such as soybean, rapeseed, cottonseed, and sunflower seed except for gluten had greater nitrogen content. Total nitrogen content liquefied solution of the mixture of organic materials and molasses or yogurt was measured after 7 days of the liquefying, thereafter, the mixture of rapeseed meal and yogurt showed the highest nitrogen, reaching about $3,000mg\;L^{-1}$. Selected liquid manure, mixture of rapeseed meal and yogurt, was applied 8 times to red-pepper plants with fertigation or foliar application. Total nitrogen of leaves at 150 days after transplanting was the highest (4.4%) in the treatment of foliar application of the selected liquid manure, whereas shoot dry weight and fresh fruit yield were the greatest in the treatment of fertigation.

• Korean Journal of Community Nutrition
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• v.3 no.5
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• pp.748-758
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• 1998

The Recommended Dietary Allowances(RDAs, Nutrient standards), dietary guidelines, and food guides, each define aspects for a healthy diet in different ways. The RDA and food guide for Koreans were first established in 1962 by the Food and Nutrition Committee of the Korea FAO Association. The committee released the RDA and suggested ways to intake the recommended nutrients. Every five years, the committee has added more data and released revisions. The latest edition of the RDA is the 6th revision. In the beginning, the concept of basic food groups was emphasized as basic data for planning means based on RDA. In the 5th revision, the basic food groups and dietary guideline for public health from the Ministry of Health and Welfairs(December, 1990) suggests that, 1) Eat a variety of foods with a recommended fat intake equaling or less than 20% of total calories ; 2) Maintain ideal body weight and prevent obesity ; 3) Eat foods low in salt. Salt intake should not exceed 10g ; 4) Do not drink too much ; 5) Eat regularly and enjoy meals. After these guidelines were established, the first nutritonal education efforts guidelines were developed in 1984. Despite broad possibilities for application, they had limited use, mainly as a nutritional assessment and food balance sheet preparation. They were not well utilized in public nutritional education and nutritonal policy through the media because of the weakness of the government's food and nutriton policy. Also a lack of administrative support and dietitians in the health department and administrative organizations was partly to blame. In regard to public health and nutrition status, life expectancy has increased 10 years since the 70's and the elderly population increased threefold in 1995 compared to 1960. The common causes of death in 1996 by 19 Chapters classification, were first disease of the circulatory system ; the second, neoplasms ; the third, external causes fo mortality ; the forth, diseases of the digestive system ; and the fifth, respiratory system diseases, In food intake, grain and complex starch intake has decreased while fruit and animal foods have considerably increased. Therefore, energy from carbohydrates has decreased while energy from protein and fat has increased. Energy intakes from protein, fat and carbohydrates were respectively 12.5, 7.2 and 80.3% in 1969 but 16.1, 19.1 and 64.8% in 1995. 62.9% of the householes had the fat energy less than 20%, while 37.1% had the fat energy above 20%. The only intakes of vitamin A and calcium were below RDA levles. Therefore, nationwide attention should be focused on public nutriton education and public activities with supplementation of the RDAs, according to the food guide and the dietary guideline.

• Journal of Mushroom
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• v.10 no.4
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• pp.151-159
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• 2012

The button mushroom (Agaricus bisporus) is one of the most widely cultivated important edible mushroom species. In the breeding of new button mushroom, 'Seolgang' was developed by crossing two monokaryons 'CM020913-27' and 'SSU423-31'. Because of the secondarily homothallism, only a small percentage of the basidia produce 3 or 4 spores, which are mostly haploid (n) and do not fruit. Single spore cultures derived from these types of spores produce a vegetative mycelium that also contain a variable number of genetically identical nuclei per cell called monokaryon. The lack of clamp connections between monokaryon and dikaryon required a series of mycelial culture and fruiting test. After crossing, hybrids were cultivated on a small scale and on a commercial scale at a farm. For this, the spawn was made by a commercial spawn producer and the spawned compost by a commercial compost producer. Mycelial growth of 'Seolgang' on CDA was better at $20^{\circ}C$ and $25^{\circ}C$ when it was compared with that of '505 Ho'. The mature cap shape of new strain 'Seolgang' is oblate spheroid and the immature cap shape is round to oblate spheroid. The cap diameter was 41.2 mm on average. In comparison with white strain '505 Ho', the strain had a yield that was 9% higher. It produced fruiting bodies which had a higher weight on average per fruiting body and were 19% firmer with a good shelf life. Days of fruiting body were 3-4 days later than those of '505 Ho'. The physical characteristics such as elasticity, chewiness, adhesiveness were better than that of '505 Ho'. Genetic analysis of the new strain 'Seolgang' showed different profiles compared to '505 Ho', CM02913-27, SSU413-31, when RAPD primers A02 and O04 were used.

• Journal of Bio-Environment Control
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• v.14 no.4
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• pp.280-283
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• 2005

The growth and yield of ever-bearing strawberry $(Fragaria{\times}ananassa\; Duch.)$ 'Pechika' were compared after transplant treatment in the raised hydroponic culture on highlands in summer season. The transplant production methods compared were whole plant refrigerated, outdoor over-wintered, pot-refrigerated, and 1 -year-old transplants. Growth increment at planting was the highest in pot-refrigerated transplants. C/N ratio of the pot-refrigerated transplants was 39.2 which was higher than 19.5 of 1-year-old transplants. However, the growth increment up to the first harvest were not different among the treatments. The first harvesting date of 1-year-old transplants was August 14, which was 5-9 days late than in the other treatments. The average fruit weight was highest in the 1-year-old transplants with 12.6 g. Marketable yield was the highest in the pot-refrigerated transplants, followed 1-year-old, plant refrigerated, and outdoor over-wintered transplants. Therefore, the pot-refrigerated transplants are recommended for marketable yield increase in ever-bearing strawberry cultured on highlands.

• The Korean Journal of Food And Nutrition
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• v.28 no.6
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• pp.1071-1081
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• 2015

Environment-friendly agricultural products are consumed widely, but little is known about consumers' acceptability. The objectives of this study were to 1) determine consumers' acceptability of cucumber when consumed raw, 2) determine differences in appearance liking between environment-friendly and conventionally grown cucumber samples, and 3) analyze the physicochemical properties of cucumber. White dadagi, gasi, non-pesticide mini cucumber, organic gasi, and organic Joseon cucumber samples were evaluated for consumers' acceptability using a nine-point hedonic scale; White dadagi, organic Joseon, and organic gasi cucumber samples showed the highest acceptability scores. However, there were three consumer segmentations differing their degree of cucumber liking and preference. Consumers liked the appearance of organic gasi best. Consumers' preference of cucumbers did not change upon evaluation of the acceptability of the appearance of whole fruit with and without a label indicating an environment-friendly status. Additionally, the physicochemical properties of the cucumbers-including color (skin and flesh), length, circumference, weight, water activity, brix, and texture (hardness and fracturability)-were measured. All measurements showed significant differences among samples, with the exception of water activity and hardness. White dadagi was 3.8 brix, which was the highest among cucumbers, followed by non-pesticide mini cucumber and organic Joseon. White dadagi, organic Joseon, and organic gasi showed greater fracturability than the other cucumber samples.

• The Korean Journal of Food And Nutrition
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• v.27 no.3
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• pp.484-494
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• 2014

The purpose of this study was to evaluate dietary intake according to the risk of coronary heart disease (less than 10% = low-risk group; 10~20% = middle-risk group) based on Framingham risk score (FRS), on 122 male adult subjects. The body weight and body mass index were not significantly different between the groups, while height of the low-risk group was shown to be significantly high compared to that of the middle-risk group. The daily energy intake was shown to be significantly high in the low-risk group with 1,910.88 kcal, compared to 1,606.63 kcal of the middle-risk group. As a result of analyzing nutrient intake per 1,000 kcal of energy, while the low-risk group had significantly high intake of animal protein, fat, and animal fat compared to the middle-risk group, the intake of plant protein, carbohydrate, and plant iron was found to be significantly low. The daily food intake was shown to be significantly high in the low-risk group (1,445.16 g), compared to the middle-risk group (1,075.12 g). The low-risk group was found to have significantly high intake of sugars, eggs, and beverages compared to the middle-risk group, while mushrooms intake was significantly high in the middle-risk group. Dietary variety score (DVS) was significantly high in the low-risk group with 26.42, compared to 22.66 of the middle-risk group. Dietary diversity score (DDS) was indicated to be significantly high in the low-risk group with 3.70, compared to 3.27 of the middle-risk group. The low-risk group was indicated to have significantly high score in DDS of dairy products and fruit group, compared to the middle-risk group. In the correlation between diversity index of food intake (DVS and DDS) and FRS, DDS was shown to have significantly negatively correlation with FRS after adjusting for confounding factors. To sum up these results, the adult males with low-risk of coronary heart disease had more various consumptions of fruits and milk, compared to the subjects with the middle-risk. The proportion of consuming major food groups such as cereals, meat group, milk, fruits, and vegetables more than a fixed quantity was indicated to be high. Accordingly, dietary habit for intake of various food seems to be necessary, to prevent coronary heart disease.

• Journal of the Korean Society of Food Culture
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• v.20 no.5
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• pp.594-602
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• 2005

The purpose of this study was to investigate eating behaviors related to snack and self-purchasing snack (SPS) among elementary school children. Self-administered questionnairs were completed by 352, 5th and 6th grade elementary school students living in 3 different regions which included apartment region in Bundangn, Sungnam (apartment group, n=116), residences in Seodaemun-Gu and Mapo-Gu, Seoul (kang-buk group, n=103) and residence in industrial region in Sungnam (industry group, n=133). The results were as follows: A significantly higher proportion (64.7%) of the apartment group had breakfast every morning than those of kang-buk (48.6%) or industry (52.1%) group (p<0.01). As for the frequency rate of snack and self-purchasing snack (SPS), 53.9% of the subjects answered taking snack more than once per day, 22.8%, once for few days and 23.3%, almost not. However, 15.5% of the subject had SPS once or more per day, 30.7%, 1-2 times per week and 22.4%, almost not. Those of apartment group showed significantly lower SPS frequencies (p<0.01), since higher proportions answered having SPS 1-2times per week (40.9%) and almost not (31.3%) compared to other groups. The reasons for having SPS turned out to be 'hunger' 54.7%, 'being habitual', 15.9%, 'bing bored', 15.7% and 'with peers' 13.7%. When subjects selected SPS foods, they considered taste (31.5%), price (23.0%), mood at the time (14.1%), sanitorial aspect (10.2%) and quantity (10.1%) rather than nutritional aspect (7.2%). Subjects' pocket money was estimated as 3736 won per week and SPS expense per time as 706 won. But subjects who spent more than 2000 won for SPS expense were significantly higher (33.0%) in apartment group than those of other groups (p<0.01). The favorite snack items that subjects having at home were fruit, ice cream, milk and yoghurt, cookies, ramen and bread in order. And favorite SPS items turned out to be ice cream, cookies, duckbokki, frozen bars, gum, chocholate and candy in order. The frequency rate of SPS were evaluated to be significantly related by several variables: those living in apartment area (p<0.01), those taking breakfast regularly (p<0.01), those of normal weight status by Rohrer index (p<0.05) and those receiving less pocket money (p<0.01) showed lower SPS frequency rate.