한우육의 육질등급 및 부위 별 지방산 조성 비교

이연정,김천제,김진형,박범영,성필남,강근호,김동훈,조수현,Lee, Yeon-Jung,Kim, Cheon-Jei,Kim, Jin-Hyong,Park, Beom-Young,Seong, Pil-Nam,Kang, Geun-Ho,Kim, Dong-Hun,Cho, Soo-Hyun 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.1

The fatty acid composition of Hanwoo beef was investigated by different quality grades and cuts. Five cuts (strip loin, loin, chuck roll, top round, brisket) were obtained from 15 Hanwoo beef cattle [bulls and steers, 24-30 mon old]. For each quality grade of $1^{++}$, $1^+$, 1, 2, 3, three animals were selected. The contents of C18:0 in chuck roll, strip loin, brisket, top round and loin were significantly higher in 3 quality grades than those of the other grades respectively (p<0.05). The C18:1n9 content in the chuck roll was not significantly different among the different grades, but those of strip loin, top round, brisket, and loin were significantly higher in $1^{++}$ quality grade than those of 3 quality grade (p<0.05). The C18:3n3 content was significantly higher in brisket of $1^{++}$ quality grade and loin of 3 quality grade than the other grades for the same cut (p<0.05). However, those of strip loin, top round and chuck roll were not significantly different (p>0.05) among the different grades. The C18:3n6 content in chuck roll and loin was significantly higher for 2 quality grade than in those of the other grades (p<0.05). For five cuts, total SFA contents for 3 quality grade were significantly higher than in other cuts. The total MUFA content of $1^{++}$ quality grade was significantly higher than in 3 quality grade (p<0.05). The total n-3 PUFA content was not significantly different in chuck roll, strip loin and top round; however, those of brisket were significantly higher in $1^{++}$ quality grade (0.15%) and those of loin were significantly higher in 3 quality grade than in the other grades (p<0.05). The total n-6 PUFA content was significantly higher in 3 quality grade than in those of the other grades (p<0.05).

한우육의 육질등급에 따른 부위별 전단력, 근절길이, 콜라겐의 함량 및 관능 특성

이연정,김천제,박범영,성필남,김진형,강근호,김동훈,조수현,Lee, Yeon-Jung,Kim, Cheon-Jei,Park, Beom-Young,Seong, Pil-Nam,Kim, Jin-Hyong,Kang, Guen-Ho,Kim, Dong-Hun,Cho, Soo-Hyun 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.6

This study was conducted to investigate the Warner-Bratzler shear force (WBS), sarcomere length, total collagen contents and consumer tests of different cuts of Hanwoo beef based on quality grade. Five cuts [Cheggt (striploin), Dngsim (loin), Moksim (chuck roll), Udoon (top round), Yanggi (brisket)] were obtained from Hanwoo beef (bulls and steers, 24-30 months old) and grouped by their quality grades ($1^{++}$, $1^+$, 1, 2 and 3). The WBS values of chuck cut in $1^{++}$, $1^+$ and 1 quality grade groups were 5.47 (kg/0.5 $inch^2$), 5.46 (kg/0.5 $inch^2$) and 6.54 (kg/0.5 $inch^2$), respectively, which were significantly lower than those of chuck in quality grade 3, which was 8.41 (kg/0.5 $inch^2$) (p<0.05). The sarcomere length of the quality grade groups were significantly longer for brisket (3.72 ${\mu}m$) of $1^{++}$ quality grade than for that of 3 quality grade brisket (p<0.05). Brisket of $1^{++}$ and 2 quality grade had significantly greater sarcomere lengths than strip loin and top round in the same quality grade (p<0.05). The total collagen contents of strip loins in the $1^{++}$, $1^+$, and 1 quality grade groups (1.17, 1.18 and 1.14 g/100 g, respectively) were significantly lower than those of the 3 quality grade group (1.63 g/100 g) (p<0.05). The overall sensory scores of tenderness and juiciness for the five cuts of $1^{++}$ quality grade were significantly higher than those of the other quality grade (p<0.05). Among the five cuts, loin had the highest tenderness and juiciness scores (p<0.05), whereas top round had the lowest tenderness and juiciness scores (p<0.05). Overall, there were significant differences in the WBS and sensory properties among quality grades and cuts (p<0.05). However, the sarcomere length and total collagen contents of chuck roll, top round and loin did not differ among quality grades.

한국음식에 대한 일본관광객의 기호도 및 재방문 의사에 관한 연구

이연정,Lee Yeon-Jung 동아시아식생활학회 2005 동아시아식생활학회지 Vol.15 No.3

This study was performed by questionnaire to investigate the preference for Korean traditional foods and revisiting intentions of Japanese tourists. The Subjects were consisted of 280 Japanese tourists staying at Gyeongju and Busan area. The results of this study were as follows: Among the respondents, $61.1\%$ selected 'taste' as the most important factor affecting the preference for korean traditional foods. On the frequency of eating, 'over 8 times per year' scored as high as $27.9\%$. The motivation of eating Korean foods was answered as 'With visiting Korea' by $48.2\%$ Thirties and forties ate Korean traditional foods more often than the others did $61.8\%$ of the Japanese tourists intended to eat more Korean traditional foods in the future. But the necessity of hygienic improvement was pointed out by $32.1\%$ of the subjects. Male subjects wanted the improvement of nutrition, taste and storage, while females shape, color and packing. The preferred Korean traditional foods were 'Bulgogi', 'Kimgui', 'BaechooKimchi', 'Bibimbap', and 'Samgaetang' in the order. On the other hand, the preference for 'Soojeongkwa', 'Songpeon', 'Kalgooksoo', 'Injelmi' and 'Sikhye' was very low. Male subjects favoured 'Cholbap', 'Ogokhap', and 'Youkgaejang', while females liked better 'Oisobaki' and 'Ddukboki. The people who were over fifties preferred 'Ssalbap', 'Boribap', 'BaechooKimchi', and 'Ggakdugi' and forties liked 'Kongbap' and 'Kimhap' better. The most effectual food items provoking revisiting intention to Korea were 'Jeon', and 'Bap', 'Meon' and 'Jjigae' were ranked in next.

한류가 한국 음식에 대한 인식과 태도에 미치는 영향 -방한 일본인 관광객을 대상으로-

이연정,Lee, Yeon-Jung 동아시아식생활학회 2006 동아시아식생활학회지 Vol.16 No.5

This questionnaire study was conducted to investigate the levels of recognition and attitude for Korean traditional food among Japanese tourists. The aim was to provide basic data for making a detailed marketing direction alignment of globalization and commercialization of Korean traditional food. The results can be summarized as follows. The 'Korean wave(Hanliu)' was 'the number of known Korean star performers'(3.77 points), 'the number of watched Korean dramas'(3.67 points), 'the number of watched Korean movies'(3.44 points), 'the number of owned Korean singer's tapes or CDs'(3.04 points), 'the number of read books'(2.83 points), and 'the number of viewed cartoons'(2.49 points), in order. The high-intake frequency of Korean traditional foods was 'Bibimbap', 'Galbigui', 'Baechookimchi', 'Bulgogi', 'Kkakdugi', 'Tteokbokki', 'Japchae', 'Galbitang', 'fajeon', and 'Namullyu' in order. On the other hand, the intake frequency of 'Songpyeon', 'Inielmi', 'Sikhye' and 'Sujeonggwa' was very low. The most effective 'Hanliu' item for raising the recognition of Korean traditional food was 'the number of read books'. The most effective 'Hanliu' item for raising the experience of Korean cooking was 'the number of read books', followed by 'the number of watched Korean movies', 'the number of watched Korean dramas', and 'the number of viewed cartoons' in order. The most effective 'Hanliu' item for raising the intake frequency of Korean traditional food was' the number of watched Korean dramas', followed by 'the number of watched Korean movies' and 'the number of read books' in order.

한우육의 육질등급에 따른 부위별 일반성분, pH, 육색, 보수력, 가열감량, 콜레스테롤 및 트랜스지방산 함량

이연정,김천제,박범영,성필남,김진형,강근호,김동훈,조수현,Lee, Yeon-Jung,Kim, Cheon-Jei,Park, Beom-Young,Seong, Pil-Nam,Kim, Jin-Hyoung,Kang, Geun-Ho,Kim, Dong-Hun,Cho, Soo-Hyun 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.6

본 연구는 수소 및 거세우(24-30개월) 15두(각 육질등급별 3두씩)를 공시축으로 이용하여 우육의 부위(목심, 채끝, 우둔, 양지머리, 등심)에 따른 육질등급($1^{++}$, $1^+$, 1, 2, 3)별 일반성분, pH, 육색, 보수력, 가열감량, 콜레스테롤 및 트랜스지방산 함량을 조사하였다. 일반성분에서 단백질함량은 16.66-22.64% 범위고 수분함량은 57.40-75.69% 범위 였으며 지방함량은 0.61-24.74%로 나타났다. 육질등급별 단백질함량은 $1^{++}$등급 목심, 채끝, 양지머리, 등심부위가 16.66-19.26%범위로 유의적으로 낮은 함량을 나타난 반면에 3등급에서는 21.50-22.48%로 유의적으로 높게 나타났다(p<0.05). 수분함량은 3등급이 다른 육질등급에 비해 유의적으로 높게 나타난 반면에 지방함량은 유의적으로 낮게 나타났다(p<0.05). pH는 5.49-5.88범위로 $1^+$등급 목심(5.61)과 채끝(5.51)이 3등급 목심(5.88), 채끝(5.92)부위보다 유의적으로 낮게 나타난 반면에 우둔과 양지머리 및 등심부위에서는 육질등급 간에 유의적인 차이가 나타나지않았다(p>0.05). $L^*$은 $1^{++}$ 등급육이 38.52-42.69범위로 3등급육(33.02-36.08)보다 유의적으로 높게 나타났다(p<0.05). $1^{++}$, 2등급 등심의 $L^*$은 각각 42.69, 40.15로 우둔부위(38.52, 35.42)보다 유의적으로 높게 나타났다(p<0.05). $a^*$은 3등급 채끝(15.36)과 등심부위(18.48)가 1등급 채끝과 등심부위(23.35, 28.11)보다 유의적으로 낮게 나타났다(p<0.05). 보수력은 등급 또는 부위에 따른 유의적인 차이는 나타나지 않았다(p>0.05). 가열감량은 $1^{++}$ 등급 등심부위(22.21)가 3등급(27.67%)보다 유의적으로 낮게 나타났으며(p<0.05) $1^{++}$, $1^+$, 1 등급 우둔과 양지머리부위가 28.98-31.39% 범위로 채끝과 등심부위(22.21-24.81%)보다 유의적으로 높게 나타났다(p<0.05). 콜레스테롤 함량(mg/100 g)은 $1^{++}$(41.26), $1^+$(43.23), 1등급(48.63) 등심이 2(36.02), 3등급(29.84)보다 유의적으로 높은 함량을 나타냈으며(p<0.05) $1^+$(43.23), 1등급 등심(48.63)이 $1^+$, 1등급 우둔부위(36.64, 35.39)보다 유의적으로 높게 나타났다(p<0.05). 트랜스지방산 함량은 1.08-2.62% 범위로 3등급이 다른 육질등급에 비해 유의적으로 높게 나타났다(p<0.05). 이러한 결과는 한우의 육질등급별로 일반성분 및 콜레스테롤과 트랜스지방산 함량에 대한 중요한 자료가 될 것이다. The objective of this study was to investigate the proximate composition, pH, meat color, water holding capacity (WHC), cooking loss (CL), cholesterol content, and trans-fatty acid content of Hanwoo beef according to quality grade and cut. Five cuts [Cheggt (strip loin), Dngsim (loin), Moksim (chuck roll), Udoon (top round), Yanggi (brisket)] were obtained from 15 Hanwoo animals [3 bulls and 12 steers, 24-30 months old]. Three animals were selected from each quality grade of $1^{++}$, $1^+$, 1, 2, and 3. The protein and moisture contents (%) were significantly higher, and the fat contents (%) were significantly lower in 3 quality grade compared to the other grades (p<0.05). pH values of chuck roll and strip loin were significantly lower in $1^+$ quality grade (5.61 and 5.51) than those in 3 quality grade (5.88 and 5.92) (p<0.05). CIE L* values were significantly higher in the $1^{++}$ quality grade group (38.52-42.69%) than in 3 quality grade (33.02-36.08) (p<0.05). In the $1^{++}$ and 2 quality grade groups, CIE $L^*$ values of loin were significantly higher than those of other cuts (p<0.05). CIE $a^*$ values of loin (28.11) in 1 quality grade were the highest, whereas those of strip loin (15.36) in 3 quality grade were the lowest (p<0.05). WHC was not significantly different among the five cuts or quality grades. In CL, loin and strip loin were significantly lower in $1^{++}$ quality grade than in 3 quality grade (p<0.05), and they were also significantly lower (22.21-24.81%) than the other cuts in the same quality grade (p<0.05). The loin in $1^{++}$ (41.26 mg/100 g), $1^+$ (43.23), and 1 quality grades (48.63) had higher cholesterol contents (%) than in 2 (36.02) and 3 quality grades (29.84) (p<0.05). Cholesterol contents of the five cuts in $1^{++}$ quality grade (39.44-43.31%) were significantly higher than those in 3 quality grade (28.09-32.39%). The trans-fatty acid contents of the five cuts were 1.08-2.72%. The loin, strip loin, brisket, and top round in 3 quality grade had significantly higher trans-fatty acid contents than those of the other grades (p<0.05).

연구논문 : 모(母)의 로하스 라이프스타일 태도가 친환경식자재 구매 및 건강식생활에 미치는 영향 연구

이연정 ( Yeon Jung Lee ) 한국식생활문화학회 2010 韓國食生活文化學會誌 Vol.25 No.6

This study was conducted to examine the effects of a healthy dietary life and purchase of environmental-friendly food materials according to a mother`s lifestyles of health and sustainability (LOHAS) attitudes. The subjects consisted of 295 mothers. The findings are summarized as follows. The mother`s LOHAS attitude index averaged 3.39 points out of 5 points. High LOHAS attitude items were “I participate actively in separating the trash collection” (4.16 points), and “I recycle dresses that I do not wear by taking them to the recycling center” (4.08 points). In contrast, LOHAS attitude items for “I do community service activity on the weekend” (2.57 points), and “I try to serve in the local community” (2.63 points) scored very low. A high LOHAS behavior index occurred for mothers who were “resource saving”, whereas “social welfare” scored low. Mother`s intention to purchase environmental-friendly food materials averaged 3.61 points. Mother`s health dietary life attitude score averaged 3.52 points. When age, monthly income, and the environmental-friendly food materials purchase ratio of the mother was high, the health dietary life performance was high. The LOHAS attitude index of mothers had an impact on the purchase intention of environmental-friendly food materials in resource saving and environmental-friendly oriented propensity groups. The LOHAS attitude index of mothers impacted healthy dietary life in environmental-friendly, family and health oriented propensity groups.

Ethosome에 캡슐화된 Palmitoyl Tripeptide의 항균효과

이연정 ( Yeon Jung Lee ),이윤섭 ( Yun Sub Lee ),진병석 ( Byung Suk Jin ) 한국공업화학회 2014 공업화학 Vol.25 No.6

Palmitoyl tripeptide (M330) showed higher antimicrobial activities than methyl paraben or phenoxy ethanol through minimum inhibitory concentration (MIC) test. However, when the M330 was added into cosmetic formulation, white precipitates formed due to the electrostatic interaction between M330 and carbopol (carboxy vinyl polymer) as a thickener in cosmetics, and the viscosity of cosmetics decreased sharply. Also, the antimicrobial activities of M330 in cosmetics became lower than those of methyl paraben or phenoxy ethanol. Thus, the encapsulation of M330 in ethosome vesicle was attempted in order to recover the declined antimicrobial activities of M330 in cosmetics and prevent the precipitates from forming. When ethosome-encapsulated M330 was added into cosmetics, the precipitates did not form, and the decrease in the viscosity of cosmetics was not large compared to the addition of unencapsulated M330. Challenge tests showed that antimicrobial activities against gram negative bacteria were improved by the encapsulation of M330, but the encapsulation was not effective against gram positive bacteria and fungus. A combination of M330 with EDTA showed synergistic inhibitory potential against C. albicans. After coencapsulation of M330 and EDTA in ethosome, antimicrobial activities proved to be higher than those of unencapsulated M330 and EDTA.

친환경 소비가치와 식태도, 영양섭취행동, 건강행동 및 삶의 질 간의 영향관계 분석

이연정(Yeon-Jung Lee) 한국조리학회 2017 한국조리학회지 Vol.23 No.7

소비자의 일반적 특성에 따른 친환경 농산물 소비 행동 분석 연구

이연정(Lee Yeon-Jung),김민(Kim Min),김은희(Kim Eun-Hee) 한국외식산업학회 2009 한국외식산업학회지 Vol.5 No.2

확장된 기술수용모델(ETAM)을 적용한 사용후기에 따른 여행 앱 사용의도 분석에 대한 연구

이연정(Lee, Yeon-Jung),이민석(Lee, Min-Seok),이철원(Lee, Chul-Won) 한국여가레크리에이션학회 2020 한국여가레크리에이션학회지 Vol.44 No.3

The purpose of this study was to investigate the intention of using travel apps by travel apps review using the extended theory of the technology acceptance model. The study targeted users in their various age groups who have experienced using a travel app. Three hundred and one responses were analyzed after data cleaning, and SPSS and AMOS software were used to conduct Frequency analysis, confirmatory factor analysis, correlation analysis, and structural equation model analysis. The outcomes reveal that, firstly, except for perceived usefulness to using intention, all factors had a positive influence. Travel apps’ review had a significant effect on perceived usefulness, perceived ease of use, and using intention. Secondly, the perceived ease of use had a significant influence on perceived usefulness and using intention. In conclusion, travel apps review draws attention to increasing travel app users’ intention to use travel apps, these findings can serve as a significant discussion point for companies developing travel apps.