• 동아시아식생활학회지
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• 제18권1호
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• pp.22-28
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• 2008

구기자 분말을 0, 1, 3, 5, 7%를 함유한 어묵을 제조하여 수분 함량, 색도, 절곡 검사, 기계적 texture, 관능검사, 기호도 검사 등의 품질 특성을 조사하였다. 구기자 분말을 첨가한 구기자어묵의 수분 함량은 모든 시료가 37%대의 수분을 함유하고 있어 고른 분포를 띄었다. 색도 변화에서 L값은 구기자 분말의 첨가량이 증가할수록 감소하였으나(p<0.001), a값과 b값은 증가하였다(p<0.001). 어묵의 유연성을 나타내는 절곡 검사에서는 모든 시료에서 AA로 측정되어 구기자 분말의 첨가에 관계없이 우수한 것으로 나타났다. 구기자 분말을 첨가한 구기자 어묵의 기계적 texture 특성은 구기자 분말 첨가량이 증가할수록 응집성(cohesiveness)은 증가했지만, 껌성(gumminess)과 파쇄성(brittleness)은 구기자 분말 첨가량이 증가할수록 감소하였다(p<0.001). 어묵의 관능검사에서는 어묵의 색상(color), 향미(flavor), 구수한 맛(pleasant taste), 경도(hardness), 부착성(adhesiveness)은 구기자 분말의 첨가량이 증가할수록 높게 나타났으나, 느끼한 맛(oilly taste)은 구기자 분말 첨가량이 증가할수록 낮게 평가되어 어묵에 구기자 분말을 첨가함으로써 느끼한 맛이 감소되었다. 어묵의 기호도 검사에서는 3LFP군이 외관의 기호도(appearance quality), 향미의 기호도(flavor quality), 맛의 기호도(taste quality), 질감의 기호도(texture quality), 전반적인 기호도(overall quality) 등의 모든 항목에서 가장 높은 평가를 받았다. 따라서 구기자를 첨가한 기능성 구기자 어묵의 가공 적성에 적절한 구기자의 첨가량은 3%가 적당하다고 사료된다.

• 한국식품조리과학회지
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• 제19권3호
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• pp.354-362
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• 2003

전통중편의 단백영양 보강을 위하여 동충하초를 첨가하여 증편의 이화학적, 기계적, 관능적 품질특성을 조사하였다. 동충하초 첨가량을 달리한 증편의 부피는 동충하초 첨가군이 대조군에 비해 증가하였고 pH는 동충하초 5%첨가 증편이 가장 낮게 나타났다. 수분은 대조군에 비해 첨가군의 수분 함량이 낮았고 (p＜.001) 동충하초 첨가군 사이에 유의적인 차이는 없었다. 아미노산 함량은 대조군보다 동충하초 첨가군이 높았으며 필수아미노산을 골고루 함유하고 특히 Leucine, Phenylalanine, Arginine이 높았다. 동충하초첨가 증편의 texture변화에서 색도 중 L값은 대조군에 비해 동충하초 첨가량이 증가할수록 감소하였으며 반면에 a, b값은 첨가량이 증가할수록 증가하였다. texture 측정에서는 껌성은 5% 첨가군이 낮게 나타났고, brittlenes는 7% 첨가군이 대조군과 다른 첨가군중에서 가장 높게 나타났다. 관능검사에서 texture에서는 웅집성이 5% 첨가군, 탄력성은 3% 첨가군이 가장 높게 평가되었으나 유의적인 차이는 없었다. flavor에서 stale grain flavor과 bitterness는 동충하초 첨가량을 증가시킬수록 높게 나타나는 경향을 보였다. 이상의 결과에서 동충하초 증편의 제조에서 이화학적 특성, 기계적 특성, 관능적 특성을 종합했을 때 동충하초 농도를 3%, 5% 첨가시 최적농도임을 도출해 내고 품질이 향상됨을 확인할 수 있었다.

• 한국식생활문화학회지
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• 제27권6호
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• pp.695-701
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• 2012

This study was conducted to improve the quality of Kongsulgidduk prepared with soyflour and sweeteners. The quality was affected by the type of sweeteners used (sugar, syrup, honey), as well as the amount used (5-20%). Rheological properties showed that when more sugar was added to Kongsulgidduk, the hardness, gumminess and brittleness were lower. In addition, more than 10% sugar led to a significant decrease in hardness, gumminess and brittleness. The addition of honey increased the hardness, but decreased cohesiveness and brittleness of Kongsulgidduk. When color was evaluated, the L-value and a-value decreased, but the b- value increased as sugar was added. The addition of honey resulted in a decreased L-value. Sensory evaluation revealed that the addition of sugar resulted in better overall quality. The color score was highest when 5% sugar was added, while the flavor, moisture and chewiness scores were best when 10% sugar was added. Sweetness and consistency were good when 20% sugar was added. Honey improved the color, flavor and chewiness of Kongsulgidduk; however, sugar produced the best moisture, consistency and overall scores.

• 한국식품조리과학회지
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• 제20권6호
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• pp.658-666
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• 2004

In order to develop and commercialize high quality frozen soy yogurt, the effects of industrial proteases and commercial mixed cultures were examined on the functional properties and the sensory attributes of frozen soy yogurt. For quality improvement, soy protein isolates were primarily hydrolyzed by either Flavourzyme or Neurtrase, industrial Proteases, to reduce the beany flavor and increase the functional properties of the protein. The viable cell count of lactic acid bacteria was higher in the soy protein hydrolysates than whenuntreated. ABT-5 (L. acidophilus, Bifidobacterium lactis, and S. thermophilus) resulted in higher acid tolerance, bile acid tolerance and melt-down percent values than those with YC-X11 (Lactobacillus bulgaricus and Streptococci thermophilus). The overrun of frozen soy yogurt was improved by both Flavourzyme $(193.3\%)$ and Neurtrase $(156.7\%)$ treatments. With regard to thesensory characteristics, Flavourzyme improved the beany flavor, astringency taste, mouth feel and overall quality of frozen soy yogurts fermented with ABT-5. Further studies onproduct formulation will be needed to commercialize the frozen soy yogurt for the market.

• 한국식품조리과학회지
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• 제22권6호통권96호
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• pp.882-889
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• 2006

The quality characteristics were measured, using sensory evaluation and mechanical characteristics, for the addition of different percentages of apricot juice(0%, 5%, 10%, 15%, 20%) to rice flour, in order to promote the use of and liking for the traditional Korean rice cakes. The pH was decreased with apricot juice addition, while acid was increased. The moisture contents were 36.2${\sim}$45.0% . The L-value was decreased with increasing apricot juice addition, while a- and b-values were increased. In mechanical texture characteristics, hardness, gumminess and brittleness were the highest at the 10% apricot juice level(p<.001). Springiness was also the highest at 10% level but the difference was not significant. In the sensory evaluation, the color, flavor, sourness, hardness and chewiness were increased with apricot juice addition. Apricot sulgidduk made with the addition of 10% apricot juice to rice flour was found to be the best recipe in terms of acceptability, flavor quality, taste quality, and overall quality and there was a significant difference between the samples. The springiness was negatively correlated with the cohesiveness, springiness, gumminess and brittleness while moistness was positively correlated with moisture, hardness, cohesiveness, springiness, gumminess and brittleness.

• 동아시아식생활학회지
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• 제22권3호
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• pp.357-364
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• 2012

Quality characteristics of sausage with added pine needle powder (0%, 0.5%, 1.0%, 1.5%, 2.0%, and 2.5%) as an ingredient. The basic ingredients of sausage consisted of pork meat 60%, olive oil 20%, and ice water 20%. Sensory properties of sausage were analyzed by a sensory test, and the texture and color characteristics were measured using a texturometer and color meter, respectively. In the results of the sensory test, taste, texture, and overall preference were highest in the sample with added 1.5% pine needle powder. The sausage with added 1.5% pine needle powder was moderate in color intensity, pine needle flavor, and astringent taste. Hardness and gumminess of sausage were higher in 1.0% and 1.5% pine needle powder. However, springness and chewiness of sausage showed no significant differences. In terms of color intensity of sausage, L-value and a-value were lower and b-value was higher, depending on the pine needle powder amount. Development of off-flavor of sausage during storage was greater in 0% and 1.5% added sausages than in 2.0% sausage with increasing storage time. As a conclusion, sausages with added 1.5% and 2.0% pine needle powder were the most suitable for making functional sausage with added pine needle powder.

• 한국식품영양학회지
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• 제33권3호
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• pp.257-265
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• 2020

This study investigated the volatile flavor composition of essential oils from Solidago virga-aurea var. asiatica Nakai with different harvesting area. The essential oils obtained by the hydrodistillation extraction method from the aerial parts of the plants were analyzed by gas chromatography (GC) and GC-mass spectrometry (GC-MS). Ninety-five (91.61%) volatile flavor compounds were identified in the essential oils from the S. virga-aurea var. asiatica Nakai harvested in Koheung, Jeolanamdo. The major compounds were hexadecanoic acid (29.22%), 7-hexyl eicosane (9.12%), spathulenol (7.701%), 3,8-dimethyl decane (6.48%), caryophyllene oxide (4.52%) and α-copaene (4.23%). Fifty-seven (97.43%) volatile flavor compounds were identified in the essential oils from the S. virga-aurea var. asiatica Nakai harvested in Seoguipo, Jejudo. The major compounds were 2-carene (40.95%), α-copaene (10.77%), α-muurolene (5.81%), and spathulenol (3.11%). The chemical composition of the essential oils was significantly different in quality and quantity with the different harvesting area. The quantitative variations of hexadecanoic acid, 7-hexyl eicosane, spathulenol, 3,8-dimethyl decane, caryophyllene oxide, 2-carene, and α-copaene according to different harvesting area can serve as a quality index of the S. virga-aurea var. asiatica Nakai essential oils in food industries.

• Preventive Nutrition and Food Science
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• 제19권4호
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• pp.314-320
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• 2014

Flavor quality of Liriopis tuber tea that was made using a steaming process was studied by measuring changes in headspace volatile compounds. Headspace volatile compounds of the prepared samples were isolated, separated and identified by the combined system of purge & trap, automatic thermal desorber, gas chromatography, and mass selective detector. As steaming frequencies were increased, the area percent of aldehydes decreased from 32.01% to 3.39% at 1 and 9 steaming frequency times, respectively. However, furans and ketones increased from 18.67% to 33.86% and from 9.60% to 17.40% at 1 and 9 times, respectively. The savory flavor of Liriopis tuber tea was due to a decrease in aldehydes contributing a fresh flavor at the 1st steaming process and newly generated furans from nonenzymatic browning with repeated steaming frequencies. These results will provide basic information for quality control of the newly developed Liriopis tuber tea.

• 한국미생물·생명공학회지
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• 제47권2호
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• pp.234-241
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• 2019

In Korea, traditional doenjang is manufactured using the conventional method at home and by small-scale enterprises. Because this age-old process depends on natural inoculation of various microorganisms, it is difficult to reproduce or maintain consistency in the final product quality across batches. Moreover, doenjang occasionally prepared by this method raises safety concerns related to aflatoxin, biogenic amine, and Bacillus cereus contamination. To develop starters that can be conveniently used at home or in small industry settings for the manufacturing of safe and flavor-improved doenjang, autochthonous microbe starters were developed in dried forms as ready-to-use starters. Each starter powder prepared by heat- or freeze-drying methods remained stable even after 24-week storage. These ready- to-use starter powders were successfully applied to lab-scale fermentation for the production of safe and flavor-improved doenjang. We believe that these ready-to-use starter powders will benefit small-scale enterprises in the manufacturing of doenjang of good reproducible quality.

• 동아시아식생활학회지
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• 제22권4호
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• pp.506-513
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• 2012

This principal objective of this study was to evaluate the sensory properties and flavor compounds of Kimchi prepared with different levels (0.0%, 0.4%, 0.8%, and 1.2%) of Backryeoncho extracts (BE). At high levels of BE, Kimchi showed increased level of crispness and flavor, and also jeotgal odor decreased in the sensory evaluation. Addition of 0.8 % BE resulted in the highest scores for color, taste, and overall acceptance of Kimchi. Therefore, addition of 0.8 % BE appears to be an acceptable approach to enhance the quality of Kimchi without reducing acceptability. As a result of flavor compound analysis, a total of 24 volatile flavor compound, including 11 S-containing compounds, 6 terpenes, 1 acid, 1 ester, 1 alcohol, 2 miscellaneous compounds, 2 thiocyanates, etc., were detected by GC/MS. The major volatile compounds were s-containing compounds and terpene hydrocarbon, and especially terpene of sabinene was newly detected in Kimchi with added BE. Levels of 2-vinyl-[4H]-1,3-dithin derived from garlic flavor as a sulfide-containing compound along with diallyl trisulfide derived from green onion flavor were reduced in Kimchi with added 0.8% BE. Most sulfide-containing compounds were reduced in Kimchi with added BE, whereas most terpenes detected in control Kimchi were not detected.