• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.18 no.1_2
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• pp.27-32
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• 2012

There are many possibilities that recycled papers adulterate contaminants during the process. The objective of this research was to evaluate safety of paper-based packaging materials for food, especially commercial pizza boxes in Korea. Ultimately, we compared recycled and non-recycled commercial paper packaging materials. This study was based on Korean Food and Drug Administration (KFDA) regulation. PCBs were measured by GC-ECD. Arsenic and lead were analyzed using an ICP-MS. Formaldehyde was determined by LC-MS. Fluorescent materials were detected by UV lamp. The result of this study shows that non-recycled paper packaging materials meets all the tested hygienic specifications for food packaging materials, whereas recycled paper-based paperboard box may be contaminated by fluorescent whitening agent. Though these results need to be further studied, it is recommended to avoid using recycled paper in direct contact with food when used in food packaging.

• Journal of the Korean Society of Food Culture
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• v.4 no.4
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• pp.383-393
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• 1989

This study was surveyed by 318 male and 288 female college students eating out behaviours in Seoul. The results were summarized as follows; 1. Listed below are the major kinds of eating out of the home, breakfast form 8.9%, lunch 76.9%, supper 24.5% and snacks 25.7%. 2. 'Lunch out everyday' by male 53.5%, by female 52.5% 3. The reason why they lunch out indicates carrying a lunch box is 'inconvenient' by 35.1%, 'convenient' by 32.2%, 'hard to prepare the lunch box' by 19.9%. 4. When they choose kinds of food they are ascribed to 'preference' by 66.5%-74.6% the highest percentage of all. 5. The percentage rate of families who eat out Korean food gained the highest percentage by 59.7% next western food 16.6%, chinese food 15.2%, but the lowest percentage was Japanese food by 4.3%. 6. Ra-myun and noodles occupy the highest percentage of male by 43.7%-40.6%, female by 32.4%-54.3%. 7. When viewed from food preference for eating out take fried chicken, Pizza, Kalbi, Bulkoki and Tangsuyook. 8. The price the students generally pay for lunch was 500-1400 wons, averages to 1,000 wons. The price of eating out per capita a day, when taken by family unit averages to 5,200-5,900 wons. 9. College students offered suggestions for 'expensive in prices' 59.1%, 'Unsanitary' 14.1% when eating out.

• Korean journal of food and cookery science
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• v.24 no.4
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• pp.525-535
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• 2008

This survey was conducted to assess dining-out behaviors and menu preferences of university students in the Seoul area. The results were as follows: 1. 65.2% ate out rarely for breakfast and 73.1% ate out frequently for lunch, whereas 20.9% occasionally ate out for lunch. The frequency of dining out for breakfast was influenced by age, gender, and major but the frequency of dining out for lunch was significantly correlated with age(P < 0.01). 79.2% of females dined out frequently, but 62.3% of males reported doing so(P < 0.001). 65.2% ate out frequently for dinner and 31.6% did so occasionally. 34.2% dined out frequently for snacks, and 53.5% did so occasionally. 2. Factors to consider in dining out were as follows: taste > preference > price > persuasion > nutrition. The motivations for dining out were as follows: convenience > favorite food > difficult to prepare lunch box > difficult to carry lunch box > habit. This factor was correlated significantly with age(P < 0.05) and residence type(P < 0.001). Problems with dining out were listed as follows: unbalanced nutrition > price > sanitation > variety of menu > taste. This factor was correlated significantly with age(P < 0.05), alcoholic beverage use(P < 0.01) and smoking(P < 0.01). 3. Foods selected for meals when dining out were as follows: Korean style > Western > Japanese > noodles > Chinese. The expense(in won) of dining out for lunch was as follows: 3,000${\sim}$5,000 > 2,000${\sim}$3,000 > over 5,000 > under 2000. Problems to be corrected in Korean-style food were as follows: variety of menu > price > using personal dish. 4. Korean foods preferred in each cooking style when dining out were as follows: beef rib > kimchi-jjigae > bulgogi > doenjang-jjigae > bibimbab. Chinese foods selected were as follows: tangsuyuk > jajang myeon > jjambbong > gganpunggi > bokeumbab. Preferred Western foods were as follows: spaghetti > steak > pork cutlet > pizza > ribs > chicken. Preferred Japanese foods in meals when dining out were as follows: sushi > hoe > udong > pork cutlet > soba. Preferred noodle foods selected when dining out were as follows: ddukboki > ramyeon > mandu > guksu > sundae > gimbab >. Preferred baked foods for dining out were as follows: cake > pizza > loaf bread > baguette > sandwich > hamburger > doughnut > cream bread.