• Title/Summary/Keyword: fruit and vegetables

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Development and validation of an analytical method for fungicide fenpyrazamine determination in agricultural products by HPLC-UVD (HPLC-UVD를 이용한 살균제 fenpyrazamine의 시험법 개발 및 검증)

  • Park, Hyejin;Do, Jung-Ah;Kwon, Ji-Eun;Lee, Ji-Young;Cho, Yoon-Jae;Kim, Heejung;Oh, Jae-Ho;Rhee, Kyu-Sik;Lee, Sang-Jae;Chang, Moon-Ik
    • Analytical Science and Technology
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    • v.27 no.3
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    • pp.172-180
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    • 2014
  • Fenpyrazamine which is a pyrazole fungicide class for controlling gray mold, sclerotinia rot, and Monilinia in grapevines, stone fruit trees, and vegetables has been registered in republic of Korea in 2013 and the maximum residue limits of fenpyrazamine is set to grape, peach, and mandarin as 5.0, 2.0, and 2.0 mg/kg, respectively. Very reliable and sensitive analytical method for determination of fenpyrazamine residues is required for ensuring the food safety in agricultural products. Fenpyrazamine residues in samples were extracted with acetonitrile, partitioned with dichloromethane, and then purified with silica-SPE cartridge and eluted with hexane and acetone mixture. The purified samples were determined by HPLC-UVD and confirmed with LC-MS and quantified using external standard method. Linear range of fenpyrazamine was between $0.1{\sim}5.0{\mu}g/mL$ with the correlation coefficient (r) 0.999. The average recovery ranged from 71.8 to 102.7% at the spiked level of 0.05, 0.5, and 5.0 mg/kg, while the relative standard deviation was between 0.1 and 7.3%. In addition, limit of detection and limit of quantitation were 0.01 and 0.05 mg/L, respectively. The results revealed that the developed and validated analytical method is possible for fenpyrazamine determination in agricultural product samples and will be used as an official analytical method.

A Study on Seasonal Variations of Food Consumption of Korean Farmers (한국농촌주민(韓國農村住民)의 계절별(季節別) 식품섭취조사연구(食品攝取調査硏究))

  • Park, Michael Myung-Yun
    • Journal of Nutrition and Health
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    • v.9 no.1
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    • pp.43-50
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    • 1976
  • This is the report of a food consumption survey of 193 members of 30 farm families in three rural villages of Korea. From a total of 188 households of the three villages, namely Wolgok in Kyunggi Do Province, Wachon in Kangwon Do Province, and Sobong in Cholla Namdo Province, 30 households were chosen for the survey. Four consecutive seasonal surveys, beginning in the autumn, November 1974 and finishing with the summer, August 1975, were made and each survey covered three consecutive days. The Precise Weighing Method was used in evaluating the kinds of food and nutrient intakes of the subjects. This method entails the accurate weighing of all foods by the investigator just prior to their consumption by the subjects under investigation. This survey was male to determine the actual food eaten by the members of these farm families at each season of the year, and to note any special differences in the foods consumed. The results obtained are summarized as follows: Food Intake The traditional ordinary diet of Korean farmers consists mainly of rice and other cereals as staple foods, and simple subsidary foods. The nutritional shortcomings of rice as a staple food are evident in the subclinical status of nutritional deficiencies. The mean consumption of cereals and their products was very high and it was more than half of the daily total food intake throughout all the seasons. The consumption of animal food, fruits, and fat by the farmers was very low. Fruit intake during winter and spring was almost nil. One of the special foods in the Korean dietary pattern is Kim-chi, a variety of pickled and fermented vegetables. The mean intake of Kim-chi during autumn and winter was very much higher than the other seasons. Korean farmers have difficulties in balanced year-round supply of food due to seasonality of food production and lack of food preservation. As nutrition problems of Korean farmers are highly influenced by seasonal variations, the expansion of an appropriate food preservation and storage programme should be encouraged. Special consideration should be given to new methods of preservation, the types of foods preserved, and production and consumption of nutritionally valuable foods for the improvement of the nutritional status in rural communities. Nutrient Intake Average adult rates for calorie and protein in the three study areas were 0.80 and 0.87 respectively, with little variations by villages. The adult caloric intake in averaged 2,928 kcal for autumn, 2,662 for winter, 2,673 for spring, and 2,760 for summer. Cereals contributed most of the total calories. In terms of the recommended daily dietary allowances for the Korean given by the Korea FAO Association, the diets in this survey were adequate except in the winter and spring. The protein intake averaged from 76.4 grams in autumn to 83.4 grams in summer and was near the recommended allowance, but a relatively large proportion of the total protein came from cereals and their products. The fat intake was unsatisfactory, ranging from 19.2 grams to 29.3 grams for the four seasons, and the consumption during farming season was higher than other seasons. It is apparent that the diet of the Korean farmers should be supplemented by calcium during autumn and winter. The highest calcium intake, with a mean of 583.5 milligrams, was recorded in summer. The mean intake of iron ranged from a low of 9.2 milligrams in the autumn to a high of 15.0 milligrams in the spring and it was satisfactory for all seasons. Among the vitamin group, the daily average intakes of vitamin A, thiamine, riboflavin, and ascorbic acid were lower than the desired intake throughout all the seasons. The mean vitamin A intake as ${\beta}-carotene$ ranged from a low of 2,807.8 IU to a high of 5,221.0 IU. The thiamine intake ranged from 0.98 milligrams to 1.19 milligrams, while mean riboflavin intake ranged from 0.92 milligrams to 1.13 milligrams. Ascorbic acid intake was 37.3 milligrams, the lowest, and the highest 47.8 milligrams. Niacin intake among Korean farmers was higher than the recommended allowance throughout all the seasons, and the mean intake ranged from 18.3 milligrams to 25.8 milligrams. The main character of the Korean farmers' diet has been found low in quality of protein and high in carbohydrate. Attention should be paid to the low intake of vitamin A, thiamine, riboflavin, and ascorbic acid among Korean farmers.

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Case-Control Study of Diet in Patients with Cervical Cancer or Precancerosis in Wufeng, a High Incidence Region in China

  • Jia, Yao;Hu, Ting;Hang, Chuan-Ying;Yang, Ru;Li, Xiong;Chen, Zhi-Lan;Mei, Ye-Dong;Zhang, Qing-Hua;Huang, Ke-Cheng;Xiang, Qun-Ying;Pan, Xiu-Yu;Yan, Yu-Ting;Wang, Xiao-Li;Wang, Shao-Shuai;Hang, Zhou;Tang, Fang-Xu;Liu, Dan;Zhou, Jin;Xi, Ling;Wang, Hui;Lu, Yun-Ping;Ma, Ding;Wang, Shi-Xuan;Li, Shuang
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.10
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    • pp.5299-5302
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    • 2012
  • Purpose: To investigate the diet of patients with cervical cancer and precancerosis in the Wufeng area, a high-incidence region in China. Methods: In the case group, 104 patients diagnosed with cervical cancer or cervical intraepithelial neoplasias (CINII/III) were recruited from the Wufeng area. Nine hundred thirty-six healthy women were selected from the same area as the matched controls. A questionnaire, which included questions about general lifestyle conditions, smoking and alcohol status, source of drinking water, green tea intake, and diet in the past year, was presented to all participants. Results: Green tea intake (P=0.022, OR=0.551, 95% CI=0.330-0.919) and vegetable intake (P=0.035, OR=0.896, 95% CI=0.809-0.993) were identified as protective factors against cervical cancer or CINII/III. There was no indication of any associations of other lifestyle factors (smoking status, alcohol status, source of drinking water) or diet (intake of fruit, meat/egg/milk, soybean food, onion/garlic, staple food and pickled food) with cervical cancer. Conclusions: The results suggest that eating more fresh vegetables and drinking more green tea may help to reduce the risk of cervical cancer or CINII/III in people of the Wufeng area.

Development of an Official Analytical Method for Determination of Imazapyr in Agricultural Commodities using HPLC-UVD (HPLC-UVD를 이용한 농산물 중 Imazapyr의 공정분석법 확립)

  • Jang, Jin;Kim, Heejung;Ko, Ah-Young;Lee, Eun-Hyang;Joo, Yoon Ji;Kim, Jinhong;Chang, Moon-Ik;Rhee, Gyu-Seek
    • The Korean Journal of Pesticide Science
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    • v.19 no.1
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    • pp.5-13
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    • 2015
  • A chromatographic method for the determination of imazapyr, a non-selective herbicide, in agricultural commodities was developed to use safety control of pesticide residue on crops, and was fully validated as an official method for residue analysis. Agricultural commodities, mandarin (fruit), hulled rice (cereal grains), pepper (vegetables), potato (potatoes) and soybean (beans) were extracted with methanol and partitioned with dichloromethane to remove the interference obtained from sample extracts, adjusting pH to 2.5 by 4N hydrochloric acid. Finally, they were analyzed by high performance liquid chromatography coupled to UV detector (HPLC-UVD). The developed method had the linearity in the range of test concentrations with coefficients of determination ($r^2$) more than 0.99. Recovery studies were carried out at three concentration levels (LOQ, 10LOQ, and 50LOQ) performing five replicates at each level. Recoveries were ranged between 72.1 to 108.0%, with relative standard deviations less than 10%. A consistent recovery was determined according to the CODEX guidelines (CAC/GL40, 2003). Finally, LC/MS with selected ion monitoring was also applied to confirm the suspected residues of imazapyr in agricultural samples. This developed method for determination of imazapyr residues in agricultural commodities. can be used as an official method.

Food Group and Dietary Nutrient Intakes by Sugar-Sweetened Beverage Intake Level in Korean High School Students Using the Data from 2007~2015 Korea National Health and Nutrition Examination Survey (2007~2015 국민건강영양조사를 이용한 고등학생의 가당음료 섭취 수준에 따른 식품군 및 영양 섭취 실태)

  • Kim, Sun Hyo
    • Journal of Korean Home Economics Education Association
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    • v.33 no.2
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    • pp.95-113
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    • 2021
  • This study examined the food group and dietary nutrient intakes by sugar-sweetened beverage(SSB) intake level in high school students aged 15~18 years(n=2,377) using the 2007~2015 Korea National Health and Nutrition Examination Survey. Subjects were classified into three groups by SSB(included carbonated drinks, sports drinks, and caffeinated drinks that contained added sugars) intake level obtained from 24-hour recall method: SSB 1(SSB intake 0 g/d), SSB 2(0 g/d < SSB intake < 50th percentile) and SSB 3(SSB intake ≥ 50th percentile). Result of daily intakes of SSB were 160.6±10.5 g/d for boys and 98.6±7.1 g/d for girls and it increased for boys(p<0.0001) and girls(p=0.0280) by year. The highest intakes were carbonated drinks followed by fruit juices for boys and girls. Intakes of carbonated drinks increased as 2.7 times for boys(p<0.0001) and 1.6 times for girls between 2007 and 2015 year. Daily intakes of vegetables were the lowest in SSB 3 of three groups for boys and girls(p<0.0001), and those of fruits were lower in SSB 2 and SSB 3 than SSB 1 for boys(p=0.0013). Daily intakes of milk & milk products decreased toward SSB 3 group for boys(p<0.0001) while those were the lowest in SSB 3 of three groups for girls. Daily intakes of dietary fiber(21.3~25.3%) and calcium(49.6~59.8%) were very low compared to the dietary reference intakes. Percentage of daily intakes compared to the dietary reference intakes increased for energy for boys and girls(p<0.0001) while decreased for vitamin C toward SSB 3 group for boys(p<0.0001) and girls(p=0.0382). Those of calcium were the lowest in SSB 3 of three groups for boys(p<0.0001) and girls(p=0.0008). Ratio of excess intakes of energy/fat increased toward SSB 3 group for boys and girls(p=0.0002). Ratio of calcium deficiency was not different among groups but that was very high(85.9~92.5%). Therefore, it should be emphasized to reduce SSB intakes in order to improve diversity in food group and dietary nutrient intakes among high school students through dietary education and government support.

Monitoring of Total Sugar Contents in Processed Foods and Noncommercial Foodservice Foods (국내 유통 가공식품과 단체급식 메뉴의 당 함량 실태조사)

  • Choi, Mi-Hee;Kwon, Kwang-Il;Kim, Jee-Young;Lee, Jee-Sun;Kim, Jong-Wook;Park, Hye-Kyung;Kim, Myung-Chul;Kim, Gun-Hee
    • Korean Journal of Food Science and Technology
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    • v.40 no.3
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    • pp.337-342
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    • 2008
  • In this study, HPLC was used to determine the total sugar contents of processed foods as well as main and side dishes that were acquired from noncommercial foodservices. The total sugar content was identified as the total amount of both mono- and di-saccharides according to the nutritional information standard defined by the Korea Food and Drug Administration. The results for the processed foods were as follows: $25.3{\pm}9.5%$ for biscuits, $11.7{\pm}10.6%$ for snacks, $29.9{\pm}17.7%$ for chocolate, $35.5{\pm}9.3%$ for processed chocolate products, $11.0{\pm}2.7%$ for fruit juice, $10.0{\pm}3.6%$ for carbonated beverages, $23.0{\pm}3.2%$ for ice cream, $24.5{\pm}3.2%$ for ice milk, and $11.4{\pm}2.6%$ for stirred yogurt. Overall, candy items had relatively higher total sugar contents ($71.1{\pm}19.3%$ ) than any other items. Foods in the school zone had $52.3{\pm}24.4%$ total sugars. The noncommercial foodservice foods were classified into 5 main dish categories and 12 side dish categories. The total sugar contents of the main dishes were $2.6{\pm}1.9%$ for cooked rice with seasoning, and $4.7{\pm}0.1%$ for spaghetti. Among the side dishes, hard boiled foods and stir-fried foods contained the highest amounts of sugar, which were dependent on the main ingredients in the foods. Other side dishes with high sugar contents included seasoned vegetables/dried fish/seaweed ($5.5{\pm}5.3%$), salads ($5.6{\pm}3.1%$), and kimchies ($5.7{\pm}4.1%$). The total sugar contents of the side dishes ranged widely, and were significantly different according to main ingredients, cooking method, and amount of spice.

Application of White Light Emitting Diodes to Produce Uniform Scions and Rootstocks for Grafted Fruit Vegetable Transplants (과채류 접목 시 균일한 접수와 대목 생산을 위한 백색 LED의 적용)

  • Hwang, Hyunseung;Chun, Changhoo
    • Journal of Bio-Environment Control
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    • v.31 no.1
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    • pp.14-21
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    • 2022
  • Uniform scions and rootstocks should be produced to ensure grafting success. Light quality is an important environmental factor that regulates seedling growth. The effects of warm- and cool-white light emitting diode (LED) ratios on seedling growth were investigated. Scions and rootstocks of cucumber, tomato, and watermelon were grown in a closed transplant production system using LED as the sole lighting source. The LED treatments were W1C0 (only warm-white), W1C1 (warm-white: cool-white = 1:1), W3C1 (warm-white: cool-white = 3:1), and W5C2 (warm-white: cool-white = 5:2). The seedlings grown in W1C1 had the shortest hypocotyls, and the seedlings grown in W1C0 had the longest hypocotyls among the three tested vegetables. The hypocotyls of watermelon scions, watermelon rootstocks, and tomato rootstocks were shortest in W1C1, followed by those in W3C1, W5C2, and W1C0, but there was no significant difference between W3C1 and W5C2, which remained the same as the ratio of cool-white LEDs increased. In addition, tomato scions had the first and second longest hypocotyls in W1C0 and W3C1, respectively, and the shortest hypocotyls in W5C2 and W1C1, along with W5C2 and W1C1, although the difference was not significant. The stem diameter was highest in W1C0 except for tomato seedlings and rootstocks of watermelon. The shoot fresh weight of scions and rootstocks of cucumber and watermelon and the root fresh weight of cucumber scions were lowest in W1C1. These results indicated that different ratios of LED lighting sources had a strong effect on the hypocotyl elongation of seedlings.

Comparison of the Inhibitory Effects of Nematicides on Nematode Populations in a Regional Vinyl Plastic House (지역별 시설재배지에서 식물기생선충의 살선충제에 대한 밀도억제 효과 비교)

  • Kim, Sae-Hee;Park, Sang-Eun;Ko, Na-Yeon;Ryu, Tae-Hee;Shin, Heo-Seob;Kwon, Hye-Ri;Seo, Mi-Ja;Yu, Yong-Man;Youn, Young-Nam
    • Korean journal of applied entomology
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    • v.52 no.3
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    • pp.215-225
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    • 2013
  • To assess the efficacy of nematicides for the control of plant-parasitic nematodes in fruit and vegetables fields, soil samples were collected from a cucumber field at Gongju; from strawberry fields at Buyeo, Nonsan, and Jinju; and from a melon field at Gocksung in Jeonnam Province, Korea. Plant-parasitic nematodes were separated from each soil sample and identified. The susceptibilities of the nematodes to abamectin 1.68% SC, cadusafos 3% GR, dazomet 98% GR, fosthiazate 30% SL and BA12011 SL were examined under laboratory and field conditions. The average population density of plant-parasitic nematodes was generally reduced after the treatment with nematicides; however, there was increase in the population of Pratylenchus spp. in soil after treatment with fosthiazate at Buyeo and Gocksung. Furthermore, there were increased populations following treatment with abamectin, cadusafos, and dazomet at Gocksung. The control effects of BA12011 treatment on plant-parasitic nematodes were confirmed to be similar to those of the other 4 nematicides evaluated, although its control effect was higher than that of fosthiazate in cucumber-growing soil at Gongju. The effects of nematicide treatment on egg mass formation in each of the collected soils differed according to the region of soil origin. Abamectin was effective in reducing the degree of egg mass formation in Buyeo and Jinju soil, whereas BA12011 was effective in Nonsan and Gocksung soil. Dazomet was found to inhibit egg mass formation in Gongju soil. To evaluate the effect of the newly developed nematicide, BA12011, experiments were conducted in a cucumber-growing greenhouse. The average population densities of Meloidogyne spp., Pratylenchus spp., and Helicotylenchus spp. after the first treatment were reduced to a greater extent than after the second treatment. It is thus suggested that early nematicide treatment is important for effective control of plant-parasitic nematodes.

A Study on the Differences in the Dietary Habits, Nutrient Intake and Health Status of Vegetarian (Lacto-Ovo Vegetarian) and Non-Vegetarian Korean Elementary School Children (초등학생의 Vegetarian(lacto-ovo vegetarian)과 Non-Vegetarian의 식습관, 영양소 섭취 및 건강습관 차이에 관한 연구)

  • Choi, Kyung-Soon;Shin, Kyung-Ok;Jung, Tae-Hwan;Chung, Keun-Hee
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.40 no.3
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    • pp.416-425
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    • 2011
  • The objective of this study was to investigate the effects of vegetarian (lacto-ovo vegetarian) and non-vegetarian diets on dietary habits, nutrient intake, and health status. The vegan subjects were 22 children. Among them, 54.5% of the subjects had a specific religion, 36.4% had been vegetarian since weaning, and 9.1% had become vegetarian to prevent obesity or atopy. The percentages of excessive eating by the vegetarian children were lower compared to the non-vegetarian children. The rates of intake of vegetables (42.2%) and fruits and fruit juice (55.9%) by the vegetarian children were higher compared to non-vegetarian subjects. Non-vegetarian children consumed more milk, dairy products, as well as meat, fish, eggs, soybean, and tofu than the vegetarian subjects. Vegetarian children ate more bread, potato, and fruits as snacks than non-vegetarian children. Furthermore, non-vegetarian children consumed more carbonated beverages and ice cream than the vegetarian subjects (p<0.05). Generally, the subjects' energy intake was lower than standard values, and vegetarian children's calcium intake was deficient. Non-vegetarian children's fiber intake was deficient, and they consumed fat, vitamin $B_2$, calcium, and cholesterol excessively (p<0.05). Nutrition tablet intake was higher among non-vegetarian children; however, the rate of fatigue among subjects was higher among vegetarian subjects than non-vegetarian subjects. Among the vegetarian subjects, 19.6% reported that they had a cold. Consequently, for the purpose of attaining balanced physical development and growth among children, an education program that emphasizes complete diets should be prepared.

Analysis of Relationship Between Dental Health Condition and Eating Habit (치아건강상태와 식습관과의 상관관계 분석)

  • kim, Jeong-Sook;Lee, Jong-Do;Jung, Hyo-Kyung
    • Journal of Technologic Dentistry
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    • v.29 no.1
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    • pp.103-119
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    • 2007
  • The survey on dental health condition and eating habit of local residents in Daegu and Kyungbuk had been conducted. Through the analysis of influence of dental health condition on eating habit I could get the following result. The number of subjects of survey is 630. The period of survey is from June 2006 to September 2006. 1. General quality of subjects is that forty-four point four percent of subjects are male and fiftyfive pointsix percent are female. The age of thirty point one percent of subjects is between 20 and 29. Fifty-six point two percent of subjects are married. Fifty-one point four percent of subjects have above bachelor degree. Monthly income of forty-four point eight percent of subjects is less than one million won. Twenty-four point four percent of subjects are students. Fifty-five point seven percent of subjects are living in big cities. 2. Forty-seven point seven percent of male and fifty-one point eight percent of female answered their subjective dental health condition is bad. Marital status, age and academic background have relationship with answer. Forty-three point nine percent of married subjects and forty-one point five percent of divorced or bereaved subjects said they have bad dental health condition. The older he is or the lower academic background he has subjects think they have bad dental health condition. Forty-seven point four percent of non-educated subjects answered their dental health condition is bad. Forty-six percent of self-employed subjects and subjects who live in the country have tendency to think their dental health condition is bad. 3. About eating habit knowledge, male's knowledge of 2.03$\pm$0.20 is lower than female's of 2.08$\pm$0.21. This shows there is statistically significant difference(p<0.01). 4. There is significant relationship between subjective dental health condition and health condition of subjective. This means subject who has better health condition has also better dental health condition(37.5%). About subjective dental health condition, subject who eats restoratives has worse dental health condition. This shows there is a relationship between dental health condition and eating restoratives(p=0.004) and subject who works out steadily has better dental condition. 5. About relation between dental health condition and eating habit, subject who eats vegetables has worse dental health condition by fifty point seven percent. As cross tabulation result, p-value is 0.002. In level of significance of 0.05, there is statistically significant difference in eating habit. 6. It seems that eating habit has an effect on marital status, age, academic background, income and also on dental prosthetic treatment situation. Many subjects think their dental health condition is bad. About eating habit, subjects who eat meat have better dental health condition. Subjects who drink green tea and fruit juice has better dental health condition than who drink coffee and Balanced diet is good for dental health condition. As eating habit is important for developing dental health, government should make a proper program. Dental health education program especially for elderly, low-eduacted, residents in the country and poor people should be developed. Government, dental health organization, dental health specialist, associated research institution and people work in the press should be concerned and devote to improve quality of life. Primary prevention education will help for dental health.

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