자연치즈와 치즈향 농축물의 화학적, 관능적 분석에 의한 향미 비교

한영실(Young-Sil Han) 한국식품영양과학회 1995 한국식품영양과학회지 Vol.24 No.6

Cheddar, Emmentaler, Parmesan 그리고 Roquefort 치즈 등 자연 숙성 치즈와 지방 분해효소를 첨가하여 발효시킨 뒤 치즈향 농축물의 휘발성 향기 성분을 GC 및 관능적 분석을 통하여 비교하였다. 저급지방산이 그 특유의 향미를 나타내는데 가장 큰 영향을 미치는 성분으로 알려진 Parmesan 치즈향 농축물과 향미의 주성분으로 알려진 Cheddar 치즈향 농축물은 그 함량이 다른 시료 보다 10배 이상 높게 나타났다. 또한 메틸 케톤이 그 독특한 풍미의 결정적 온도가 되는 Roquefort 치즈의 경우는 제조시 lipase 및 P. roqueforti의 첨가로 메틸 케톤의 생성을 촉진시켜준 Roquefort 향 농축물의 함량이 월등히 높았다. 관능적 특성 차이를 비교한 결과 Cheddar, Emmentaler 그리고 Parmesan 치즈향 농축물이 sharpness, rancidity, soapy의 강도가 자연치즈 보다 유의성 있게 높았다. 반면, Roquefort 향 농축물에 있어서는 acidity, fruitness 등이 유의성 있게 높게 나타났다. GC profile과 관능적 특성과의 상관관계는 free fatty acid와 sharpness, rancidity, soap는 각각 0.8239, 0.8918, 0.7503 그리고 methyl ketone과 acidity, fruitness는 각기 0.9284, 0.9659의 높은 상관계수를 보였다. Volatile compounds in Cheddar, Emmentaler, Parmesan and Roquefort cheese and cheese aroma were concentrated using a microsteam distillation-extraction apparatus and those compounds were analyzed with GC. The lipase-treated cheese aroma concentrates showed significantly higher level of short-chain free fatty acids than natural ripened cheese. The sensory properties of rancidity was high in Emmentaler and Parmesan. Acidity and fruitness were shown high score in Roquefort. Correlation of free fatty acids and cheese flavors 'sharpness, rancidity and soapy' appear to be related(r=0.8239, 0.8918 and 0.7503), respectively. Methyl ketones, the most striking flavor components of Roquefort cheese showed high amounts in the series 2-heptanone>2-nonanone>2-pentanone>2-undecanone. And the intensity of the Roquefort taste sensation 'acidity and fruitness' is linearly correlated with the methyl ketone concentrations (r=0.9284, r=0.9659).

양하 추출액의 색소 안정성 연구

김명현,한영실,Kim, Myung-Hyun,Han, Young-Sil 한국식품조리과학회 2016 한국식품조리과학회지 Vol.32 No.3

Purpose: The purpose of this study was to investigate the stability of anthocyanin pigment extract from Yangha (Zingiber mioga ROSC). Methods: Yangha extract was investigated for the effects of metal ion, temperature, light, heating time, sugars, and organic acids on the stability of anthocyanin pigments. Results: Yangha pigment was more stable than other anthocyanin pigments at unstable temperatures. The stability of anthocyanin pigment significantly decreased one day after exposure to light. All tested sugars decreased the abundance of Yangha pigments, with highest levels in the presence of sucrose, and progressive decrease in the presence of maltose, fructose, glucose and galactose, in order. Among the organic acids tested, citric acid and malic acid were the most effective in stabilizing the Yangha pigment, followed by acetic acid and formic acid. Most metal ions except $Fe^{2+}$ were effective in stabilizing the pigment. Conclusion: These results provide useful reference data for the use of pigments from Yangha in processed foods.

케일 분말 첨가 생면의 항산화 활성 및 품질 특성

정이지,한영실,Jeong, Yi-Ji,Han, Young-Sil 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.3

This study was performed in order to examine the functional and quality characteristics of raw noodles with added kale powder. The raw noodles were prepared at a concentration of 4, 8, and 12% (w/w) of the kale, based on flour weight. The antioxidant activity of kale powder, specifically DPPH free radical scavenging, reducing activity, and total phenolic content were found to be 75.16%, 1.24 (O.D.) and 44.47 mg GAE/g, respectively. Using Hunter Lab color values for raw noodle with added kale powder, L (lightness) values decreased with an increased concentration of kale powder, whereas a (redness) values decreased (p<0.001). In a texture analysis, chewiness (p<0.01), gumminess (p<0.001), and cohesiveness (p<0.001) increased significantly as the amount of added kale powder increased. According to sensory evaluations: color, flavor, taste, texture, and overall palatability had the highest score in noodle with 8% kale powder (p<0.001). During periods of storage, moisture contents were decreased when kale powder concentrations increased, but pH did not differ in any of the groups and bacteria cell counts were between 0% and 8%. Kale noodles were observed at 8% then 0%, decreased by 102 log CFU/g. The antioxidant activities of raw noodles with added kale powder were increased by 8%, a 30~50% increase over the control group. These results suggest that kale powder is useful as a functional food resource with antioxidant activities.

추출용매에 따른 참죽나무 순 분말 추출물의 항산화 활성

김민정,한영실,Kim, Min Jung,Han, Young Sil 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.6

본 연구에서는 전통 식품 소재로의 활용성을 높이기 위해 참죽나무 순을 동결건조하여 일반성분과 무기질 함량을 측정하였고, 추출용매를 달리하여 얻은 열수 추출물과 70% 에탄올 추출물로부터 총 폴리페놀 및 플라보노이드 함량과 항산화능을 살펴보았다. 참죽나무 순의 일반성분 및 무기질 분석 결과, 조단백질, 조섬유, 칼슘과 칼륨 함량이 높게 측정되었다. 총 폴리페놀과 플라보노이드는 참죽나무 순 분말 열수 추출물보다 70% 에탄올 추출물에서 함량이 더 높았으며, DPPH 유리 라디칼 소거능과 FRAP 또한 70% 에탄올 추출물에서 더 높은 항산화력을 나타냈다. 이상의 결과로 볼 때 참죽나무 순 분말은 영양성과 식이섬유소의 기능성이 높아 식품의 재료로 이용가능성이 높으며, 참죽나무 순 분말로부터 유용성분 용출 및 기능성 증대를 위해서는 70% 에탄올로 추출하는 것이 바람직하다고 생각된다. In this study, the nutritional value, total polyphenol content, total flavonoid content, and antioxidant activity of freeze-dried Cedrela sinensis tender leaf powder were examined. Among the nutritional values, the crude protein, crude fiber, calcium, and potassium were abundantly present in Cedrela sinensis. The Cedrela sinensis powder was extracted with two solvents, 70% ethanol and distilled water (D.W.), to evaluate its functional properties. Total polyphenol and flavonoid contents were measured in the two different extracts, and the extracts were screened for their potential antioxidant activities using tests such as DPPH radical scavenging activity, ferric reducing antioxidant power (FRAP), and ABTS radical scavenging assay. Although both extracts exhibited good antioxidant activities against trolox, the ethanolic extract exhibited higher antioxidant activities than the D.W. extract. These results indicated that the Cedrela sinensis powder is a high-valued food ingredient and the extraction with 70% ethanol will be useful as a nutritional source with natural antioxidant activities.

감태 첨가 크래커의 항산화 활성 및 품질 특성

유민영,한영실,Yu, Min-Young,Han, Young-Sil 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.6

Ecklonia cava which is a kind of phaeophyta and belongs to Laminariales Alariaceae is a perennial seaweed distributed over Jeju and Dokdo islands. The purpose of this study evaluate antioxidant activities of Ecklonia cava crackers. Crackers were prepared with different measurements (0, 2, 4, 6, 8 g) of Ecklonia cava; indicated as S1, S2, S3, S4 and S5, and are used to examine and compare antioxidant activities, and quality characteristics. Ecklonia cava powder was used, after being extracted with 70% ethanol in hot water and done in freeze dehydration. To examine antioxidant activities of Ecklonia cava and cracker, DPPH radical scavenging activity, total phenolic and reducing power were tested. Total phenolic content was 36.86 mg GAE/g. DPPH radical scavenging activity and reducing power showed good vitality as amounts of Ecklonia cava powder increased (p<0.001). pH level decreased as amounts of power increased. L (lightness) values and b (yellowness) values decreased with an increased concentration of Ecklonia cava powder (p<0.001), whereas (redness) values didn't show tendency. S5 indicated the lowest spreadness. According to sensory evaluation, S4 (6 g) was preferred the most in terms of color, flavor, taste, appearance, texture, and overall palatability. Results suggest that Ecklonia cava powder has antioxidant effect and is useful as a functional food resource.

유자 요구르트의 항산화능과 품질특성

이영주 ( Young Joo Lee ),김순임 ( Soon Im Kim ),한영실 ( Young Sil Han ) 한국식품영양학회 2008 韓國食品營養學會誌 Vol.21 No.2

참쑥의 영양성분에 관한 연구

심영자(Young-Ja Sim),한영실(Yeong-Sil Han),전희정(Hui-Jung Chun) 한국식품과학회 1992 한국식품과학회지 Vol.24 No.1

함초 추출물의 장 기능 개선과 변비 해소 효과

조영심(Young Sim Cho),김순임(Soon Im Kim),한영실(Young Sil Han) 한국식품과학회 2008 한국식품과학회지 Vol.40 No.3

함초 추출물의 장내 이동 효과를 살펴보기 위하여 함초 추출물을 식수에 첨가하여 장 이동률을 살펴본 결과 대조군에 비해 함초 추출물을 처리한 군에서 활성탄 식이의 장 이동률은 8.5-16.4% 증가되었다. 함초 추출물의 변비해소효과는 함초 추출물을 식수에 녹여 공급한 결과 대조군에 비해 함초 추출물을 3 ㎎/㎖ 처리한 군에서의 변량이 식수 섭취량과 관련하여 최대 156% 증가하였다. 또한 함초 요구르트의 변비해소효과는 0.25% 함초 요구르트의 공급으로 변비 유발기간 내 변량이 최대 150% 증가 되었으며 처리군에 비해 loperamide를 계속 섭취함에도 불구하고 변비가 해소되었음을 알 수 있었다. 이상의 결과로 볼 때 함초 추출물은 장 이동률을 증가시켜 장운동을 촉진할 수 있으리라 생각되며 또한 변비 해소작용까지 나타내어 장 기능 개선에 효과를 나타내는 물질이라 생각된다. This study investigated the effects of dietary slander glasswort extract on improvements in bowel function and constipation relief. Balb/C mice were used to measure transit movement of a charcoal meal after slander glasswort extract was added to their drinking water at 0.36, 0.72, and 1.5 ㎎/㎖ concentrations. The extract’s constipation relief effects were investigated in Sprague-Dawley rats with loperamide-induced constipation by adding 2, 3, and 4 ㎎/㎖ of the extract to their drinking water, and by feeding yogurt containing 0.0, 0.25, and 0.50% slander glasswort extract mixed into a 10-fold amount of water. The mice receiving the extract at 1.5 ㎎/㎖ via drinking water had a 16.4% increase in the rate of transit as compared to the controls. In addition, the rats receiving the extract via drinking water and yogurt had increased in constipation relief from 128 to 156% and from 107 to 150%, respectively, as compared to the controls. Based on the results, slander glasswort is considered to have effects on improving bowel function and relieving constipation.

용안육 다식의 항산화 활성 및 품질 특성

양은영,한영실,심기현,Yang, Eun Young,Han, Young Sil,Sim, Ki Hyeon 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.4

This study was designed to evaluate the quality characteristics and antioxidant properties of Longanae Arillus powder (added in the ratios of 0%, 25%, 50%, 75%, and 100%), which is traditionally used to render the product more suited to the modern consumer's taste for the compound Longanae Arillus Dasiks. As the consumer consumption of the proportions of Longanae Arillus increases, the moisture content and pH of the Dasik supplemented with Longanae Arillus decrease, while at the same time, a soluble solid content increases (p<0.001). The color value showed the decrease in L and b values with the increase in Longanae Arillus content, and the increase in the value of the compound with the addition of Longanae Arillus (p<0.001) can be noted. The mechanical texture of Dasik was increased by the addition of Longanae Arillus considering its hardness, adhesiveness, cohesiveness, springiness, and chewiness (p<0.001). In the sensory evaluation of the Longanae Arillus Dasik showed that people expressed an overall preference at the addition of Longanae Arillus, such as noted as being preferred with 50% in color, flavor, taste, texture, and overall acceptance of the compound (p<0.001). Regarding the antioxidant activity of Longanae Arillus Dasik, the total phenolic, flavonoid contents, DPPH radical scavenging activity, reducing power, and superoxide anion levels were found to increase with the addition of Longanae Arillus (p<0.001) with its consumer use. It is believed that Longanae Arillus Dasik, is most preferred to be added at the concentration of 50% during the Dasik preparation.

곰취 분말 첨가 쌀쿠키의 항산화 활성 및 품질특성

정이지,한영실,Jeong, Yi-Ji,Han, Young-Sil 한국식품조리과학회 2015 한국식품조리과학회지 Vol.31 No.6

This study was performed to examine the functional and quality characteristics of rice cookies with added Ligularia fischeri (Ledeb.) Turcz. powder. Rice cookies were prepared with different amounts (0%, 0.5%, 1%, 1.5% and 2% to the flour quantity) of Ligularia fischeri powder. The antioxidant activities of Ligularia fischeri powder, specifically the total phenolic content, DPPH free radical scavenging activity and reducing power were found to be 212.19 mg GAE/g, $11.78{\mu}g/mL$11.78 ($IC_{50}$), and 2.33 (O.D.), respectively. The antioxidant activities of the rice cookies with added Ligularia fischeri powder increased with increasing concentrations of Ligularia fischeri powder. Regarding the hunter's color value of rice cookies with added Ligularia fischeri powder, L (lightness) and a (redness) values decreased (p<0.001) with increasing concentrations of Ligularia fischeri powder, whereas b (yellowness) values increased (p<0.01). The consumer acceptability score for the 3% Ligularia fischeri rice cookie groups ranked significantly (p<0.001) higher than the other groups in color, flavor, taste, texture and overall preference. These results suggest that Ligularia fischeri powder will be useful as a functional food resource with antioxidant activities.