• Food Science and Preservation
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• v.12 no.3
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• pp.216-222
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• 2005

This study was carried out to establish the preparation condition of muskmelon jam. A central composite design was applied to investigate effects of muskmelon paste content(40, 45, 50, 55, 60 g), fructose ratio of sugar(20, 35, 50, 65, $80\%$) and pectin addition(l, 2, 3, 4, 5 g). The maximum sugar content was 61.48 $^{\circ}$Brix in 41.04 g of muskmelon paste content, $48.10\%$ of fructose ratio of sugar and 2.12 g of pectin content. The maximum value of softness was 2.71 g in 45.06 g of muskmelon paste content, $79.46\%$ of fructose ratio of sugar and 2.71 g of pectin addition. The minimum value of jelly strength was $0.04\;g{\cdot}cm$ in 47.80 g of muskmelon paste content, $63.0\%$ of fructose ratio of sugar and 1.99 g of pectin addition. The maximum value of organoleptic overall palatability was 5.89 in 55.65 g of muskmelon paste content, $73.19\%$ of fructose ratio of sugar and 2.42 g of pectin addition. The optimum conditions predicted for each corresponding physicochemical and organoleptic properties of muskmelon jam were 55.2 g(muskmelon paste content), $76.3\%$(fructose ratio of sugar) and 2.5 g(pectin addition).

• Journal of Food Hygiene and Safety
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• v.34 no.5
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• pp.454-462
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• 2019

A conventional Korean meal typically includes various roasted, steamed, stir-fried, and braised foods. For this study, we investigated the contents of water soluble vitamins, $B_1$ (thiamin), $B_2$ (riboflavin) and $B_3$ (niacin) in various roasted, steamed, stir-fried, and braised foods. Method validation for analytical data in this study showed a high linearity ($r^2$>0.999), and the limit of detection and quantification were 0.001-0.067 and $0.002-0.203{\mu}g/mL$, respectively. For accuracy and precision, analytical values using standard reference materials were in the certified ranges. Roasted foods contained 0.039-1.057 mg/100 g of thiamin, 0.058-0.686 mg/100 g of riboflavin and 0.021-21.772 mg/100 g of niacin. Steamed foods contained 0.049-1.066 mg/100 g of thiamin, 0.025-0.548 mg/100 g of riboflavin and 0.134-21.509 mg/100 g of niacin. Stir-fried foods contained 0.114-0.388 mg/100 g of thiamin, 0.014-1.258 mg/100 g of riboflavin and 0.015-2.319 mg/100 g of niacin. Braised foods contained 0.112-1.656 mg/100 g of thiamin, 0.024-0.298 mg/100 g of riboflavin and 0.322-2.157 mg/100 g of niacin. The data on water-soluble vitamins in this study can be used for a nutritional database of conventional Korean meals.

• Analytical Science and Technology
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• v.13 no.3
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• pp.357-367
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• 2000

The polycyclic aromatic hydrocarbon (PAH) content in sewage sludge and in farm soils were determined by gas chromatography linked to mass spectrometry (GC/MS) with use 2-ethylantracene as internal standards. Twelve PAH were identified in both sludges with naphthalene ($0.78{\mu}g/g$) being the most predominant in industrial sludge and pyrene ($0.26{\mu}g/g$) in municipal sludge. The total PAR content in industrial sludge and in municipal sludge were $1.74{\mu}g/g$ and $1.19{\mu}g/g$ respectively. PAH were contained in paddy soils and the concentration were very low in the range of $0.01-0.04{\mu}g/g$. The total PAH content in industrial and in municipal sludge were about 9.2 times and 6.3 times greater than in paddy soils ($0.19{\mu}g/g$).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3774-3780
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• 2014

This study examined green tea fermented by the addition of sun-dried salt to increase the extraction of Procyanidins and Gallic acid and Theaflavins. An experiment on the change in the amount of the extract according to the saturation degree of sun-dried salt was performed. The sample of fermented only green tea extracted only Gallic acid (0.004 mg/g). No Procyanidins and Theaflavins were extracted. When the green tea was fermented by sun-dried salt, large amounts of the three compounds were extracted: Procyanidins, 75%(0.244 mg/g) and 100%(0.949 mg/g); Gallic acid, 75%(0.386 mg/g) and 100%(0.691 mg/g), and Theaflavins, 75%(0.083 mg/g). According to the date of fermentation, the largest amount of Procyanidins, Gallic acid and Theaflavins extracted were on the 2nd day(0.295 mg/g) and 7th day(2,256 mg/g) and 4th day(0.168 mg/g), respectively.

• Microbiology and Biotechnology Letters
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• v.8 no.3
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• pp.199-206
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• 1980

Some experiments on the citric acid production were carried out from soluble starch and molasses as raw materials. When soluble starch was used as substrate for the fermentation of citric acid by the strain M-80 which had assimilating ability of soluble starch in surface culture, the optimal culture media was 120g of soluble starch, 3.0g of (N $H_4$)$_2$S $O_4$, 2.0g of K $H_2$P $O_4$, 0.2g of MgS $O_4$.7$H_2O$, 1.5mg of F $e^{++}$, 1mg of Z $n^{++}$ and 20ml of methanol were added to 1 liter and optimal pH was 5.5. In about 8 days 61.8mg/ml of citric acid was produced. When treated molasses with potassium ferrocyanide was used as substrate for the fermentation of citric acid by the strain of M-315, the optimal condition in surface culture was 250g of molasses, 0.3g of N $H_4$N $O_3$, 0.05g of K $H_2$P $O_4$, 0.01g of MgS $O_4$.7$H_2O$, 0.5g of Potassium ferrocyanide and 30ml of methanol were added to 1.0 liter. On the other hand, the optimal condition in submersed culture was 250g of molasses, 0.3g of N $H_4$N $O_3$, 0.1g of K $H_2$P $O_4$, 0.01g of MgS $O_4$.7$H_2O$, 0.5g of potassium ferrocyanide, and 30m1 of methanol were added to 1.0 liter and optimal pH was all 5.0. After 9 days culture, 69.4mg/ ml, 39.6mg/ml of citric acid were separately produced in surface and submerged culture media.dia.

• Korean Journal of Food Science and Technology
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• v.32 no.5
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• pp.1002-1008
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• 2000

The purpose of this study was to provide the fundamental information for establishing the database needed to estimate total intakes of trans fatty acids in Korea. The amounts of trans fatty acids contained in 164 samples including 25 samples of margarines, 21 samples of shortenings, 19 samples of vegetable salad and cooking oils, 53 samples of confectionery products, 18 samples of bakery products, 19 samples of dairy products, and 9 samples of animal fats and meats were analyzed by capillary gas liquid chromatography. The average amounts of trans fatty acids in those foods were calculated and expressed as gram per one serving. Then, the average daily intakes of trans fatty acids per capita were estimated using the analyzed amounts of trans fatty acids and the amount of yearly production for those foods. The amounts of trans fatty acids per 100 g of lipids were $2.11{\sim}33.83%$ (14.66% on average) in margarines, $1.47{\sim}44.48%$ (14.21% on average) in shortenings, $0.18{\sim}3.82$ (1.54% on average) in vegetable salad and cooking oils, $0{\sim}45.81%$ (10.92% on average) in confectionery products, $0{\sim}18.32%$ (7.87% on average) in bakery products, $0.90{\sim}4.54%$ (2.27% on average) in dairy products, and $0.61{\sim}6.07%$ (2.24% on average) in animal fats and meats. Major isomers of trans fatty acid in the sample foods were $C_{18:1}$ and $C_{18:2}$. As a result, the korean average daily intake of trans fatty acids in korea was estimated to be 2.3 g per capita. The amounts of trans fatty acids consumed from each selected food were as follows: 0.35 g from margarines, 0.57 g from shortenings, 0.11 g from vegetable salad and cooking oils, 0.65 g from confectionery products, 0.07 g from bakery products, 0.14 g from dairy products and 0.21 g from animal fats and meats.

• Journal of Bio-Environment Control
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• v.15 no.2
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• pp.196-203
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• 2006

Objective of this research was to determine the effect of application level of fused superphosphate (FSPP) in root media containing granular micronutrient fertilizers (MF) on growth of marigold 'Orange boy' in plug culture. To achieve this, three granular micronutrient mixes such as MF 1, MF 2, and MF 3 were produced and incorporated into three root media, peatmoss+composted pine bark (1:1, v/v, PB), peatmoss+composted rice-hull (1:1, v/v, PR), and peatmoss+composted saw-dust (1:1, v/v, PS), at a rate of $0.3g{\cdot}L^{-1}$. Elevated application level of FSPP in PS medium containing each of MF resulted in increase of plant growth such as plant height, plant width, stem diameter, fresh weight and dry weight at 35days after sowing. The dry weight in the treatment of MF 1, MF 2, MF 3, and control fertilized with $9.0g{\cdot}L^{-1}$ of FSPP were 0.066g, 0.103g, 0.077g, and 0.095g per plant, respectively. These results indicated that each of MF affected marigold plug seedlings differently. The application level of FSPP resulted in the heaviest fresh and dry weight in PR medium were $9.0g{\cdot}L^{-1}$ in MF 1, $3.0g{\cdot}L^{-1}$ in MF 2, $9.0g{\cdot}L^{-1}$ in MF 3, and $6.0g{\cdot}L^{-1}$ in control. Elevated application level of FSPP in PB medium containing each of the micronutrient mix increased fresh and dry weight. The general trends in response of plant growth to elevated FSPP were linear and quadratic. The dry weight in the treatment of MF 1, MF 2, MF 3, and control fertilized with $9.0g{\cdot}L^{-1}$ of FSPP in PB medium were 0.131g, 0.104g, 0.137g, and 0.111g per plant at 35days after sowing. These results indicated that MF 1 and MF 3 performed better than MF 2 and control treatments in growth of marigold plug seedlings.

• Korean Journal of Food Science and Technology
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• v.31 no.3
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• pp.569-574
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• 1999

One hundred and ninety seven corn samples, which collected from each local province in Korea between 1995 and 1996, were analyzed for fumonisin $B_1\;(FB_1)$ and $B_2\;(FB_2)$ contamination using fluometric HPLC. $FB_1$ and $FB_2$ were detected in 143 (72.6%) and 128 (62.4%) samples from 197 samples at the concentrations ranging from 0 to $224.2\;{\mu}g/g$ for $FB_1$ and from 0 to $60.0\;{\mu}g/g$ for $FB_2$, respectively. The total fumonisin levels analyzed from 143 samples were 15.4, 37.5 and 14% for concentrations below $10\;{\mu}g/g$, above $10\;{\mu}g/g$ and above $30\;{\mu}g/g$, respectively. The total fumonisin levels containing above $10\;{\mu}g/g$ were detected the highest concentration with 53.2% in samples collected from Kangwon, and followed by Kyeongki (45.0%), Cheonbuk (40.0%), Chungbuk (26.9%) and Kyeongbuk (11.1%). The total fumonisin level containing above $10\;{\mu}g/g$ in samples collected in 1996 was higher than that in 1995. Both fumonisin $B_1$ and $B_2$ from samples collected in 1995 were detected higher than that in 1996 and $FB_1$ was detected the highest level in samples collected from Kyeongki province and followed by Kangwon, Cheonbuk, Chungbuk and Kyeogbuk (11.1%). Also, similar results were observed in $FB_2$.

• Korean Journal of Food Science and Technology
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• v.21 no.5
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• pp.619-623
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• 1989

The cultural condition of Pseudomonas mendocina for polysaccharide production was examined. The optimal medium contains following composition per liter of distilled water: Sucrose 23.75g, $(NH_4)_2SO_4$ 1.57g, Yeast extract 0.5g, $KH_2PO_4\;2.9g,\;MgSO_4.\;7H_2O\;1.0g,\;CaCO_3$ 2.5g. The optimum temperature and pH were $30^{\circ}C$ and 6.5. At the condition. Ps mendocina produced 5.98g/l of polysaccharide. The culture viscosity after 3 days was 191mPa.s at $70sec^{-1}$. The product yield $(Y_{p/s})$ and specific productivity $(Q_p)$ were 25.18% and 32.83mg/g-cell/h.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.04a
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• pp.55-55
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• 2018

본 연구는 상추 '피델'을 이용한 완전제어형 식물공장에서의 재배를 하기 위해 기존의 배양액에 생육 촉진용 AMG의 농도를 구명하고 그에 맞는 매뉴얼을 확립하기 위해 실시하였다. 실험은 기존 배양액에 AMG(고활성 칼슘용액+복합 활성 미네랄)를 추가하였으며 '피델'의 생육에 적합한 AMG의 농도는 0, 0.05, 0.1, 0.2%를 양액에 추가하여 5반복 4처리로 진행하였다. 생육 조사 항목은 초폭, 초장, 엽장, 엽폭, 엽록소, 생체중을 조사하였다. '피델'의 생장에서 초폭, 엽폭, 엽장은 3주차부터 생장량이 급증하였으며 AMG 4처리구 5주차 조사에서는 초폭 평균 335g, 357g, 369g, 381g을 나타냈으며 엽폭은 평균 168g, 191g, 202g, 208g, 엽장 평균 129g, 134g, 144g, 144g으로 조사되었다. AMG 농도 0.1~0.2%는 통계적으로 생장 촉진 효과가 나타났으나 유의차가 크지 않아 0.1% AMG가 적정한 것으로 판단되었다. 엽록소 함량의 경우 정식 2주차 이후서부터는 SPAD 평균 29~32로 기록되어 엽록소함량은 크게 변화하지 않았다. 또한 엽수의 증가폭에 비해 생체중의 증가폭이 컸으며 생체중의 경우 정식 3주부터 5주 사이에 생체중이 5배 이상 급증하는 생장 패턴을 나타내었다. 5주차 생체중에서는 0% AMG의 경우 평균 82g, 0.05% AMG는 평균 85g, 0.1% AMG는 평균 115g, 그리고 0.2% AMG는 평균 114g으로 조사되었다. 따라서 0.1~0.2% AMG에서는 차이가 없게 나타남에 따라 생장촉진을 위해서는 0.1% AMG를 추가하는 것이 적정하다고 판단되었다.