• Preventive Nutrition and Food Science
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• 제18권1호
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• pp.45-49
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• 2013

This study was carried out to determine a possibility of adding Corni fructus extract (CFE) into yogurt for improving the neutraceutical properties of yogurt and the effects of adding CFE (2~6%, v/v) on the physicochemical and sensory properties of the products during a 15-day storage period at $4^{\circ}C$. Incorporation of CFE into the yogurt samples resulted in a significant pH reduction and a significant increase in titratable acidity. When evaluating the color of the yogurt, the $L^*$-values were not significantly influenced by CFE supplementation; however, the $a^*$- and $b^*$-values significantly increased with the addition of CFE during storage. The power law and Casson models were applied to assess the flow behavior of CFE-added yogurt samples. The magnitudes of apparent viscosity (${\eta}_{a,100}$), consistency index (K), and yield stress (${\sigma}_{oc}$) for 4~6% CFE yogurt samples were significantly greater than those for the control, indicating that CFE can be used as a thickening agent for yogurt. The sensory test revealed that addition of CFE (2~4%) to yogurt did not significantly affect the overall scores, but the overall preference score for 6% CFE yogurt was significantly decreased. Based on the data obtained from the present study, we concluded that the concentrations (2~4%) of CFE could be used to produce a CFE-added yogurt without the significantly adverse effects on the physicochemical and sensory properties.

• 한국식품영양과학회지
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• 제30권1호
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• pp.70-74
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• 2001

도축 후 장시간 냉장한 돼지 지육(생체중량 105~110 kg, B등급)에서 목심부위를 취하여 $1^{\circ}C$에서 1, 8 및 15일 숙성한 것과, 육의 중성 온도가 70, 75 및 $80^{\circ}C$가 되도록 가열한 것에 대하여 이화학적.관능적 특성을 조사하였다. 숙성기간이 길어짐에 따라 생육의 pH와 $L^{*}$(lightness)값이 높아지고, VBN 함량과 육즙 손실량이 많아진 반면 $a^{*}$(redness)값과 전단력 값은 낮아졌다. 숙성기간이 걸어짐에 따라 가열육의 경도, 저작성 및 전단력값은 낮아지고 가열감량이 적어졌으며, 연도, 다즙성 및 맛이 좋아졌으나 가열육 향기의 차이는 없고, 탄력성과 종합적인 기호성은 숙성 8일째의 것이 가장 우수하였다. 중심온도를 높게 가열할수록 경도, 저작성 및 전단력값은 높아지고 가열감량이 많으며 연도와 다즙성이 나빠졌다. 그리고 탄력성, 가열육의 향기 및 종합적인 기호성은 중심온도가 $75^{\circ}C$ 되도록 가열한 것이 가장 우수하였다.

• 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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• 제40권6호
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• pp.721-725
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• 2008

더덕을 생식 원료로 동결건조 및 열풍건조를 통하여 생식을 제조하여 제조된 생식의 이화학적 및 관능적 특성, 기능성 성분의 함량 조사를 통하여 합리한 제조방법을 찾고자 하였다. 수분, 단백질, 탄수화물, 지방, 회분 등 일반성분 함량은 동결건조 및 열풍건조를 실시한 시험구들 사이에 변화가 없는 것으로 나타났고 색도는 동결건조는 실시한 시험구가 열풍건조를 실시한 시험구에 비해 L값은 높게, b값은 낮게 나타났다. 식이섬유 함량은 열풍건조를 실시한 시험구가 동결건조를 실시한 시험구보다 높게 나타났고 총 페놀성 화합물과 조 사포닌 함량은 동결건조를 실시한 시험구가 높게 나타났다. 관능검사 결과 동결건조를 실시한 시험구가 색, 맛, 향, 전체적 기호도 등에서 모두 열풍건조를 실시한 시험구 보다 높게 나타났다. 위의 결과로부터 더덕을 원료로 생식을 제조 시 동결건조 방법을 사용하는 것이 적절하다고 생각된다.

• 한국식품과학회지
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• 제40권2호
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• pp.201-206
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• 2008

쌀에 더덕을 각각 0, 10, 20, 30% 첨가하여 제조한 더덕 약주의 이화학적, 관능적 및 항산화 특성의 변화를 조사하였다. 더덕첨가량의 증가에 따라 pH는 감소되었고 총산의 함량은 증가된 것으로 나타났다. 총당의 함량은 더덕 첨가량의 증가에 따라 증가하였고 알코올 함량은 감소하였다. 색도 중 L값은 더덕 첨가량의 증가에 따른 변화가 없었으나 a와 b값은 증가한 것으로 나타났다. DPPH 자유라디칼 소거 활성은 더덕 첨가 시 증가된 것으로 나타났다. 관능검사 결과 전체적 기호도에서 20% 더덕을 첨가하여 제조한 약주가 제일 우수한 것으로 나타났다. 이화학적,관능적 및 항산화 특성으로 보아 20% 더덕을 첨가하여 약주를 제조하는 것이 적합하다고 생각된다.

• 한국식품조리과학회지
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• 제24권2호
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• pp.228-235
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• 2008

In this study, vinegar disinfection was evaluated as a novel method for the preparation of raw food ingredients used in foodservice operations. The test materials were washed and disinfected using three different methods, and were then stored at temperatures of $3^{\circ}C\;and\;10^{\circ}$ for 7 days; Following storage, physicochemical and sensory characteristic comparisons were performed. Temperature for all test materials ranged between 15.2-20. $9^{\circ}C$, water activity was maintained near 0.96, and the pH levels of the samples were 6.44, 6.29, and 6.35, respectively. Residual chlorine levels were generally low, ranging between 0.01 and 0.02. The physicochemical qualities of the samples were evaluated according to the storage method and temperature. Brightness(L value), redness(a value), and yellowness(b value) tended to increase with increasing storage time. The evaluated sensory characteristics included appearance, color, smell, taste, texture, and overall acceptance. With regard to storage temperature the vinegar-treated samples were evaluated as superior, receiving a score of 7.00, and the ingredients stored at $3^{\circ}C$ were evaluated as significantly (p< 0.001) superior to those stored at $10^{\circ}C$. Overall, vinegar is an effective disinfectant to apply in the preparation of raw vegetables that are typically served without heating, and which can cause serious food safety issues when contaminated.

• 한국축산식품학회지
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• 제33권1호
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• pp.24-30
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• 2013

This study was conducted to compare the physicochemical and sensory properties of yogurt added with nanopowdered ginseng (NPG) and powdered ginseng (PG) of different concentrations (0.1, 0.3, 0.5, and 0.7%) (w/v) during the storage at $7^{\circ}C$ for 20 d. The pH and viscosity values of yogurt added NPG or PG decreased during the storage. The pH values of the yogurt samples were ranged from 4.0 to 4.6 as a reflective of the fresh state. Viscosity values of yogurt with NPG at lower concentrations 0.1 and 0.3% (w/v) showed higher values during increased storage time. DPPH radical scavenging activity was significantly higher in the NPG-added yogurt than in the PG during the storage period (p<0.05). The lactic acid bacteria (LAB) counts ranged from $3.0{\times}10^9$ to $1.3{\times}10^9$ and $2.2{\times}10^9$ to $1.1{\times}10^9CFU/mL$ in 0.3% NPG and PG-added yogurts, respectively. Increased storage period showed decrease in LAB counts irrespective of the type of ginseng powder and storage period. In sensory test, 0.1 and 0.3% NPG-added yogurt showed similar results to control in yellowness, viscosity, and bitterness. Based on the data obtained from the present study, it was concluded that the concentrations 0.1 and 0.3% (w/v) of NPG could be used to produce NPG-added yogurt without significant adverse effects on physicochemical and sensory properties, and enhance functional value of yogurt.

• 산업식품공학
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• 제13권2호
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• pp.130-137
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• 2009

This study evaluated the potential of utilizing the osmotic solution from dried mango processing as alternative raw material for mango wine making. Fermentation was carried out using two kinds of yeast strains Saccharomyces bayanus, Lalvin EC-1118 and Saccharomyces cerevisiae, Lalvin D-47 at 20$^{\circ}C$ for 28 days. Physicochemical analysis during fermentation was performed for each treatment and the resulting wine samples were analyzed for color, volatiles and sensory properties. Results of physicochemical analysis between the two fermenting samples as well as the wine samples show almost similar results regardless of the yeast strains. Wine color of sample wines after storage were not significantly different at p<0.05 and when compared with a commercial mango wine. From the volatile analysis, esters and alcohols constituted majority of the compounds. Production of several esters, alcohols, acids and terpenes were affected by yeast strain used in fermentation. Results of sensory analysis showed that wines fermented by S. bayanus EC-1118 strain was more acceptable although sensory scores between the treatments and the reference wine showed significant differences in all the attributes evaluated, except for bitterness. The utilization of osmotic solution from dried mango process could produce similar properties with existing commercial mango wines although there is still need for further work on the improvement of some sensory attributes of the mango wines.

• 한국식생활문화학회지
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• 제36권2호
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• pp.218-225
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• 2021

The quality characteristics of sugar-reduced green tea cookies were tested, and there was no significant differences in density, spreadability, loss rate, and pH in all experimental groups (p<0.05). The sugar content of the sample with 100% sugar replaced was 0.96°Brix, which was significantly higher than the 0.80 °Brix of the control (p<0.05). The sample with 75% sugar substituted was 0.76°Brix, which was similar to that of the control (p>0.05). The calories per 100 g of cookies were reduced from 482 to 433 kcal in the sample groups, where the sugar content was reduced from 0 to 100%. Carbohydrates also decreased with decreasing sugar content. The protein was 5g in the sugar sample group reduced by 0-25%, and 6 g in the sugar sample group reduced by more than 50%. Dietary fiber was three times higher in the sugar sample group reduced by 75% than the control, and four times higher in the sugar sample group reduced by 100% than the control. No significant differences in the sweet sensory intensities were observed between the control and the 75% reduced sugar sample group (p>0.05). The brightness, savory, sweet, and aftertastes were similar in all experimental groups (p>0.05). Overall, high value-added green tea cookies with a more than 75% reduction in sugar were successfully developed with added functions of immunity, anti-cancer, antioxidant functions, preventing constipation and obesity, without deteriorating the sensory and physicochemical qualities tested.

• 산업식품공학
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• 제15권1호
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• pp.80-84
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• 2011

오미자 열매 추출물의 첨가량을 0-50%로 달리하여 식혜를 제조한 후 물리화학적 및 관능적 품질특성을 측정하고 각 특성사이의 상관관계를 살펴보았다. 추출물의 첨가량이 증가함에 따라 식혜의 pH는 유의적으로 감소한 반면 가용성 고형분 함량 및 적색도 ($a^*$값)는 증가하였다(p<0.05). 한편, 밝기를 나타내는 $L^*$값과 황색도를 나타내는 $b^*$값은 추출물의 첨가량과 직접적인 관계를 나타나지 않았다. 관능적 품질특성 중 색, 신맛, 단맛은 추출물의 첨가량과 유의적인 관계를 나타내었다(p<0.05). 상관분석 결과 추출물의 첨가량은 $L^*$값과 $a^*$값을 제외한 모든 물리적 및 관능품질 특성과 유의적인 관계를 나타내었다. 소비자 기호도검사에 의하면 10% 오미자 열매 추출물을 첨가한 식혜의 전체적인 기호도가 다른 시료군에 비해 유의적으로 높음을 알 수 있었다(p<0.05).