• Preventive Nutrition and Food Science
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• 제10권1호
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• pp.22-28
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• 2005

Physicochemical properties and sensory characteristics of kakdugi prepared with red pepper powder gamma-irradiated up to 7 kGy were determined during fermentation at 5℃. The overall fermentation patterns between kakdugies with irradiated and nonirradiated red pepper powder were similar. Kakdugi prepared with irradiated red pepper powder required one week longer time for optimal ripening compared to the kakdugi control. Irradiated red pepper powder did not affect the hardness and fracturability of kakdugi during fermentation. Kakdugi prepared with irradiated red pepper powder maintained a redder color than the kakdugi control. No significant differences were observed in taste, odor, texture, and overall acceptability (p<0.05) except for color. It can be concluded that irradiation of red pepper powder, up to 7 kGy, did not affect the quality of kakdugi with regard to physicochemical and sensory characteristics during fermentation. Moreover, irradiated red pepper powder was better for maintaining the red color and delaying optimum ripening time of kakdugi fermentation.

• 한국조리학회지
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• 제24권1호
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• pp.73-81
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• 2018

The objective of this study was to investigate their physicochemical properties and antioxidant activities of white radish teas such as pH, color value, total polyphenol contents, total flavonoids, DPPH radical scavenging activity, reducing power and sensory evaluation. They were processed by drying(AD), drying and roasting(ADR), steaming and drying(SAD), and steaming, drying, and roasting(SADR). As a result, the pH of ADR, and SADR tended to be significantly lowered and SADR was the lowest at $5.48{\pm}0.14$(p<0.001). Additionally, ADR and SADR were significantly different in color and browning value, compared to AD and SAD. There was no significant difference in reducing sugar content depending on processing methods. The total polyphenol content and total flavonoid content of the teas were significantly increase after roasting. DPPH radical scavenging activity was significantly higher in ADR and SDAR than in AD or SAD by 1.1~1.5 times(p<0.05). Compared with ADR and SADR after roasting, the sensory characteristics of AD and SAD were significantly lower than those of roasted ADAD and SAD, respectively. From the above results, it was concluded that the roasting process is a major process that affects the physicochemical quality characteristics and antioxidant activities.

• 한국식품조리과학회지
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• 제31권3호
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• pp.335-343
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• 2015

The aim of this investigation was to examine the antioxidation, physicochemical, and sensory activity of a Korean steamed-rice cake, Sulgidduk, fortified with water extracts from Moringa oleifera (M. oleifera) leaf. M. oleifera leaf extracts were added to rice powder at rations of 0.1%, 1% and 10%. To examine antioxidation properties, the scavenging activities of DPPH radicals, hydroxyl radicals, ABTS+ radicals, and ferric ion reducing antioxidant power were investigated. M. oleifera extracts significantly increased the antioxidation activities of Sulgidduk in a dose dependent manner (p<0.05). Physicochemical characteristics were measured by proximate composition, color, texture profile analysis, and sensory evaluations. As the concentration of M. oleifera leaf extracts increased, L-values and a-values significantly decreased while b-values increased. Texture profile analysis demonstrated that the control groups showed significantly higher values for hardness, cohesiveness, chewiness, and adhesiveness as compared with groups containing M. oleifera leaf extract (p<0.05). In the sensory evaluation, the sample containing 0.1% of M. oleifera leaf extract obtained the best results in overall preference. Taken together, these results suggest that M. oleifera leaf may have the potential to increase the consumer acceptability and the functionality of Sulgidduk.

• 한국축산식품학회지
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• 제34권4호
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• pp.516-524
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• 2014

This study was performed to examine the feasibility of using the low plane of nutrition (LPN) as a means of improving the meat quality of crossbred finishing pigs with a medium weight gain potential. Twenty-four barrows and 24 gilts weighing approximately 48 kg were placed on LPN [a finisher (2.86 Mcal ME/kg and 0.67% lysine) for 91 d] or on a high plane of nutrition [HPN; a commercial grower for 38 d and a finisher (3.35 Mcal ME/kg and 0.9% lysine) for 46 d]. Five barrows and five gilts per treatment weighing approximately 125 kg were slaughtered after the indicated days on the respective diets, followed by physicochemical analysis and sensory evaluation on their muscles. Overall average daily gain was 12.6% less in the LPN group vs. the HPN group (p<0.05). The redness ($a^*$) of fresh longissimus muscle (LM) from the loin as well as from Boston butt was greater in the LPN group vs. HPN whereas the shear force for fresh LM from these primals and semimembranosus muscle was lower in the former. In sensory evaluation for cooked LM, no treatment effect was detected in any of the quality traits examined, except for a lower color score in the LPN vs. HPN group. Results suggest that meat quality of the finishing pigs can be improved to some extent by using LPN. However, the present pigs, whose backfat thickness was 24 mm at 125 kg, are thought not to be lean enough to be fattened over 120 kg.

• 한국식품과학회지
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• 제30권3호
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• pp.548-551
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• 1998

우리 기호에 적합한 한국식 핫소스의 저장기간 중 이화학적 특성 변화를 조사하였다. 제조된 핫소스의 pH는 3.29, 적정산도 3.88% (w/w), capsanthin은 0.13% (w/w) capsaicin은 2.68 mg%이었다. $20^{\circ}C$ 및 $30^{\circ}C$ 항온기에 50일간 저장하면서 이화학적 성분 변화를 조사한 결과 pH 및 적정산도의 변화는 볼 수 없었던 반면 capsanthin과 capsaicin은 저장기간 동안 약간씩 감소하고 있었다. 저장기간 동안 10일마다 시료를 채취하여 관능검사를 실시한 결과 저장 30일부터 기호도가 급격히 감소하고 특히 색의 감소율이 큰 편이었다. 이화학적 성분과 관능검사 평가항목과의 상관성을 분석한 결과 capsanthin과 색과의 상관성이 높은 것으로 나타나 capsanthin의 함량을 핫소스의 품질지표로 선정하였으며 capsanthin 함량의 감소율을 근거로 하여 핫소스의 상대적인 유통기간을 예측한 바 $20^{\circ}C$에서는 232.5일, $30^{\circ}C$에서는 178.0일이 각각 예측되었다.

• 한국생활과학회지
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• 제21권2호
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• pp.363-375
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• 2012

The purpose of this study was to analyze the physiochemical properties of blackberry fruit beverage(BFB) and to develop a descriptive analysis procedure for evaluating the sensory characteristics of BFB. The amount of soluble solid, free sugar, pH, acidity, chromaticity, flavonoid, and anthocyanin of BFB were determined. All BFB samples demonstrated significantly different physicochemical properties(p<.01). Ten highly trained panelists identified the following eleven sensory attributes in the BFB and defined by standardized terminology for each attribute; turbidity, chromaticity for appearance characteristics, berry, grass, fermented, sweet, astringent, and sour for flavor characteristics, throat hit, refreshing, as well as astringent grade for textural characteristics. There were significant differences in all the eleven sensory attributes of the BFB samples(p<.001). Descriptive terminology used in the BFB analysis was capable of classifying the sensory attributes of the BFB. Based on these results, the analysis method and sensory evaluation techniques used in this study could be reasonably applied to other fruit beverages for establishing similar physiochemical characteristic and descriptive sensory attributes.

• 한국조리학회지
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• 제9권2호
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• pp.22-32
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• 2003

시판 치즈 케익 제품간에 향, 맛, 색, 당도, 질감 등에 차이를 보이는 것으로 나타났는데, 이 가운데 당도가 높은 제품의 선호도가 낮을 뿐만 아니라, 실험 대상자들이 질감 면에서 견고한 치즈 케익을 선호한다는 사실을 발견할 수 있었다. 또한 관능검사를 기초로 치즈 케익의 선호도에 영향을 끼치는 요인들 가운데 가장 중요한 역할을 하는 것이 맛이며, 다음으로는 질감과 향임이 밝혀져 일관성 있는 결과가 도출되었다. 이러한 실험결과는 향후 업소에서 디저트 품질개선을 위해 고려해야할 단서를 제공한다. 하지만 본 연구는 디저트 품질개선과 관련한 향후 연구의 기초를 제공하는 것으로 한계를 설정하였다. 이후의 연구들은 본 연구의 결과를 토대로 신제품 개발 연구와 제품 교체로 인한 업소성과 비교연구 등과 같이 보다 과학적이고 실무적 관점에서 시도될 필요가 있다.

• 한국식품조리과학회지
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• 제31권4호
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• pp.485-496
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• 2015

This study was carried out to establish the optimal conditions for curd yogurt using saccharified rice solution. A central composite design was applied to investigate the effects of pectin (2.8~8.4 g), skim milk (14~70 g) and oligosaccharide (28~84 g) ratio on the physicochemical and sensory characteristics of curd yogurt using saccharified rice solution. pH, total acidity, and color value, were analyzed and sensory evaluation was performed. The pH of curd yogurt decreased with decreasing pectin and oligosaccharide ratio. The addition of pectin had a significant effect on the viscosity while skim milk had a significant effect on the color value (a and b value). The results of sensory evaluation showed that, oligosaccharide and skim milk had significant effects on sweetness and sour taste. Oligosaccharide and skim milk masked the sour taste of curd yogurt. The optimum range of ingredients for curd yogurt using saccharified rice solution was predicted to be 4.27~4.90 g of pectin, 30.80~41.30 g of skim milk, and 28.00~36.10 g of oligosaccharide. Based on the overlapped results of physicochemical and sensory evaluation, the optimal amounts of pectin, skim milk and oligosaccharide were 4.59 g, 36.50 g and 32.05 g, respectively.

• 한국조리학회지
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• 제23권4호
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• pp.81-92
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• 2017

This research was studied to optimize the recipe of rice pound cake with two concentrations of Euonymus alatus and grape seed oil, using central composite design (CCD). The mixing condition of rice pound cake was optimized by subjecting it to sensory evaluation and mechanical and physicochemical analysis, using response surface methodology (RSM). The results of the mechanical and physicochemical analysis showed significant values for color (lightness, redness, yellowness), texture (hardness, springiness, chewiness, gumminess, cohesiveness), loss rate, volume, specific volume, sweetness, saltiness, moisture content and pH (p<0.05). The results of the sensory evaluation showed significant values for color, flavor, taste, softness, appearance and overall quality (p<0.05). As a result, the optimized compounding ratio was found to be 4.28 g of Euonymus alatus and 33.18 g of grape seed oil.

• 한국식품영양학회지
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• 제29권2호
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• pp.186-199
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• 2016

The purpose of this study was to determine the optimal composite recipe of rice muffins with 3 concentrations of Spergularia marina L. Griseb, sugar and grape seed oil, using central composite design. In addition, the mixing condition of rice muffins was optimized by subjecting it to sensory evaluation and mechanical and physicochemical analysis using response surface methodology (RSM). In regard to its antioxidant effects, Spergularia marina L. Griseb had a total phenol and flavonoid contents and DPPH free radical scavenging activity of 17.03 mg/g, 5.13 mg/g and 17.21%, respectively. The results of mechanical and physicochemical analysis showed significant values for lightness, redness, yellowness, hardness, springiness, chewiness, gumminess, cohesiveness, height, volume, weight, specific volume, loss rate, pH, moisture, sweetness and saltiness (p<0.05), and the results of sensory evaluation showed significant values for color, flavor, taste, softness, appearance and overall quality (p<0.05). As results, optimal sensory ratio was found to be 6.69 g of Spergularia marina L. Griseb, 41.89 g of sugar and 30.48 g of grape seed oil.