사회인구학적 요인이 1⁺⁺ 등급 거세한우고기의 부위 및 요리형태별 관능특성에 미치는 영향

조수현,김재희,김진형,성필남,박범영,김경의,고윤실,이종문,김동훈,Cho, Soo-Hyun,Kim, Jae-Hee,Kim, Jin-Hyoung,Seong, Pil-Nam,Park, Beom-Young,Kim, Kyung-Eui,Ko, Yoon-Sil,Lee, Jong-Moon,Kim, Dong-Hun 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.3

This study was conducted to investigate the relationship between the socio-demographic factors and the Korean consumers' palatability evaluation and to collect the sensory information for development of prediction palatability model of Hanwoo beef. Ten cuts [Abjin (short plate), Bosup (top sirloin), Cheggt (striploin), Dngsim (loin), Guri (chuck tender), Hongduke (eye of round), Moksim (chuck roll), Sulgit (bottom round), Udoon (top round), Yangji (brisket)] were separated from 5 Hanwoo steer beef (28-30 months old) and prepared with the same manner for 3 different cooking methods such as boiling, grilling, and roasting. The cooked beef samples were served to 650 consumers recruited from Seoul, Joongbu, Honam and Youngnam locations and evaluated as tenderness, juiciness, flavor, and overall acceptability. The consumer living location, age, gender, occupation, monthly income, and cut were significantly related with the scores of sensory properties when steer beef were cooked as boiling cooking (p<0.05). The eating habit and aging of beef were also significantly related with the tenderness and overall acceptability scores (p<0.01) when beef were cooked as boiled. In grill cooking, living location, aging, and cut had the significant effect on the sensory properties of Hanwoo steer beef (p<0.01). When steer beef were prepared by Korean traditional roast cooking, consumer's sensory scores were significantly different by the living location, age, occupation, monthly income, eating habit of consumers, aging and beef cut (p<0.001). Also, results from the principal component analysis showed that palatability scores of Korean consumers were decided with different contribution rate of tenderness, juiciness, flavor and overall acceptability for beef cut depending on cooking methods. In conclusion, Korean consumers' palatability for Hanwoo steer beef were related to the socio-demographic factors and the sensory scores were different by cut and cooking methods.

한우고기와 뉴질랜드산 냉장수입육의 육질 및 영양성분 비교

조수현,강근호,성필남,박범영,정석근,강선문,김영춘,김지희,김동훈,Cho, Soo-Hyun,Kang, Geun-Ho,Seong, Pil-Nam,Park, Beom-Young,Jung, Seok-Geun,Kang, Sun-Moon,Kim, Young-Chun,Kim, Ji-Hee,Kim, Dong-Hun 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.6

본 연구에서 거세한우(26-28개월) $1^+$, 1 등급육과 뉴질랜드산 냉장수입 육우로부터 채끝, 등심, 우둔, 꾸리부위를 공시시료로 이용하여 일반성분, 육색, 전단력, 가열감량, 지방산조성, 아미노산조성 및 무기물 함량을 비교하였다. 뉴질랜드산 흑우육은 채끝, 등심, 꾸리, 홍두깨 부위 모두 단백질 및 수분함량이 한우고기 $1^+$, 1 등급육보다 유의적으로 높았다(p<0.05). 반대로 근내지방함량은 뉴질랜드산 채끝, 등심, 꾸리부위가 한우고기 $1^+$, 1 등급육보다 유의적으로 낮았다(p<0.05). 육색은 뉴질랜드산 흑우육이 한우고기 $1^+$, 1 등급육과 비교했을 때 채끝과 홍두깨 부위의 $L^*$값(백색도)이 유의적으로 높았고 꾸리 부위의 $a^*$값(적색도) 및 $b^*$값(황색도)은 유의적으로 낮았다(p<0.05). 전단력은 채끝, 등심, 홍두깨 부위에서는 원산지간에 유의적인 차이가 없었으나 꾸리부위에서는 한우고기 $1^+$, 1 등급육이 뉴질랜드산 흑우육보다 전단력이 유의적으로 높았다(p<0.05). 뉴질랜드산 흑우육이 한우고기보다 4개 부위 모두에서 유의적으로 가열감량이 높은 것으로 분석되었다(p<0.05). 지방산 조성에서 뉴질랜드산 흑우육은 한우고기보다 C18:0 및 C18:3n3 함량이 유의적으로 높았고 C16:1n7 및 C18:1n9 지방산은 유의적으로 낮은 것으로 분석되었다(p<0.05). 특히 C18:2n6 지방산은 한우고기 $1^+$ 등급육이 4개 부위 모두에서 가장 높게 나타났다(p<0.05). 뉴질랜드산 흑우육은 한우고기 $1^+$, 1 등급육보다 포화지방산(SFA) 함량이 유의적으로 높은 반면에 단일불포화지방산(MUFA) 함량은 유의적으로 낮았다(p<0.05). 한편 n-3 계열 다가불포화지방산 함량은 뉴질랜드산 흑우육이 유의적으로 더 높았다(p<0.05). 아미노산 조성에서 aspartic acid, threonine, serine, alanine, valine, leucine, isoleucine, tyrosine, phenylalanine, lysine, histidine 함량은 채끝, 등심, 꾸리 및 홍두깨 부위 모두에서 뉴질랜드산 흑우가 유의적으로 높았다(p<0.05). Cystein, arginine과 proline 함량도 뉴질랜드산 흑우육이 한우고기 $1^+$, 1 등급육보다 채끝과 등심 부위에서 유의적으로 높았다(p<0.05). 무기물 조성 비교에서 뉴질랜드산 흑우육은 한우고기보다 채끝부위의 Ca 함량과 홍두깨 부위의 Zn 함량이 유의적으로 더 높았던 반면에 한우고기 1 등급육은 뉴질랜드산 흑우육보다 채끝과 꾸리 부위에서 Fe 함량이 유의적으로 더 높은 것으로 분석되었다(p<0.05). 결론적으로 한우육과 뉴질랜드산 수입흑우육은 부위에 따라 차이는 있었으나 전반적으로 한우육은 근내지방과 단일불포화지방산 함량이 높았고 뉴질랜드산 흑우육은 단백질함량과 아미노산함량이 상대적으로 더 높은 것으로 나타났다. 뉴질랜드 흑우육은 한우육보다 유통경로상 냉장숙성기간이 더 길었으나 전단력 수치를 비교한 결과 등심, 채끝등심, 홍두깨 부위의 연도는 차이가 없는 것으로 나타났다. 결론적으로 한우고기는 뉴질랜드산 흑우육보다 근내지방함량이 높고 특히 단일불포화지방산함량이 높았으며 뉴질랜드산 흑우육은 단백질함량과 아미노산함량이 높았다. 또한 뉴질랜드산 흑우육이 수입육 유통경로상 한우육보다 숙성기간이 더 길었음에도 불구하고 전단력 분석결과 등심, 채끝등심 및 홍두깨 부위의 연도에 있어서 한우육과 유의적인 차이가 없었고 가열감량이 적어 한우육이 뉴질랜드산 흑우육보다 숙성효과 및 육질이 우수 This study was conducted to investigate the proximate composition, meat color, Warner-Bratzler shear force (WBS), cooking loss (CL), fatty acids composition, amino acid composition and mineral contents of Hanwoo beef (QG $1^+$, 1) and imported New Zealand black Angus beef with loin, strip loin, eye of round and chuck tender. The intramuscular fat contents were higher in the strip loin, loin and chuck tender of Hanwoo beef than New Zealand beef (p<0.05). Hanwoo QG 1 beef had higher Fe contents in the strip loin (30.52 mg/100g) and chuck tender (40.70 mg/100g) (p<0.05). Hanwoo beef had lower cooking loss and than those of New Zealand beef, whereas New Zealand beef had higher protein and amino acids contents (%) than their counterpart. There was no significant difference in the WBS between two origin samples except the chuck Hanwoo beef had significantly lower saturated fatty acids (SFA) and higher monounsaturated fatty acids contents than New Zealand beef (p<0.05). WBS values indicated that Hanwoo and New Zealand beef had similar tenderness in the loin, striploin and eye of round due to the longer aging periods of the New Zealand beef than Hanwoo beef during the distribution.

한우고기와 호주산 냉장수입육의 육질 및 영양성분 비교

조수현,성필남,강근호,박범영,정석근,강선문,김영춘,김종인,김동훈,Cho, Soo-Hyun,Seong, Pil-Nam,Kang, Geun-Ho,Park, Beom-Young,Jung, Seok-Geun,Kang, Sun-Moon,Kim, Young-Chun,Kim, Jong-In,Kim, Dong-Hun 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.5

본 연구는 거세한우(26-28개월) $1^+$, 1등급육과 호주산 수입 흑우 및 교잡육으로부터 채끝, 등심, 우둔, 꾸리부위를 공시시료로 이용하여 원산지별 부위간의 일반성분, 육색, 전단력, 콜라겐함량, 가열감량, 지방산조성, 아미노산조성 및 무기물 함량을 비교하였다. 단백질 함량은 채끝과 등심부위는 한우고기 $1^+$, 1 등급육이 호주산 앵거스 또는 교잡종육 보다 유의적으로 높은(p<0.05) 반면에 우둔과 꾸리부위에서는 비교구간에 유의적인 차이가 없었다(p>0.05). 지방함량은 채끝부위에 있어서는 한우 $1^+$ 등급육이 15.48%로 8.83%인 호주산 교잡육보다 유의적으로 높았고, 등심 부위에서는 한우육 $1^+$, 1 등급육이 각각 17%, 15.52%로 호주산 앵거스 흑우육(10.59%) 및 교잡육(9.21%)보다 유의적으로 높았다(p<0.05). 육색 비교에서 채끝부위는 호주산 교잡종이 CIE $L^*$(백색도)이 한우고기보다 유의적으로 높았고 적색도(CIE $a^*$)은 동일한 부위내에서 비교구간에 유의적인 차이가 없었으며 CIE $b^*$(황색도)는 채끝, 등심, 우둔 및 꾸리 부위 모두에서 유의적으로 가장 높은 것으로 나타났다(p<0.05). 부위별 전단력 비교 결과 채끝부위는 호주산 교잡종이 유의적으로 가장 높았던(3.02 kg) 반면에 호주산 앵거스 흑우가 유의적으로 가장 낮았다(p<0.05). 한편 등심, 우둔 및 꾸리 부위는 전단력에서 유의적인 차이가 없는 것으로 분석되었다. 총 콜라겐 함량은 한우고기가 4개 부위 모두에서 호주산 쇠고기보다 유의적으로 더 높은 것으로 분석되었다(p<0.05) 지방산 조성에서 호주산 교잡종육이 채끝, 등심, 우둔부위에서 한우고기보다 palmitic acid, stearic acid, linolenic acid 함량이 유의적으로 높은 반면에 palmitoleic acid, vaccenic acid, eicosenoic acid 함량이 유의적으로 낮은 것으로 분석되었다(p<0.05). Oleic acid 함량은 한우고기 $1^+$, 1등급육이 호주산 교잡종육과 비교했을 때 채끝, 등심, 우둔 및 꾸리부위에서 유의적으로 더 높은 것으로 나타났다(p<0.05). 한우고기 $1^+$, 1등급육은 호주산 교잡육보다 포화지방산 함량이 낮고 단일불포화지방산 함량(MUFA) 함량이 높은 것으로 분석되었다(p<0.05). 한우고기 $1^+$ 등급육은 우둔과 꾸리부위에서 glycine 함량이 가장 높았고 한우 1 등급육은 채끝과 등심 부위에서 cystein, methionine, glycine 함량이 호주산 앵거스 흑우육 보다 유의적으로 더 높았으며, 우둔과 꾸리부위에서는 valine과 leucine 함량이 유의적으로 더 높았다(p<0.05). 무기물 조성에서 Ca, Fe, Zn 함량은 비교구간에 유의적인 차이가 없는 것으로 분석되었다(p>0.05). This study was conducted to investigate the proximate composition, meat color, Warner-Bratzler shear force (WBS), total collagen content (%), cooking loss (CL), fatty acid composition, amino acid composition, and mineral content of loin, strip loin, top round, and chuck tender Hanwoo beef and imported Australian beef. Protein content was significantly lower for strip loin and loin of Hanwoo QG $1^+$ and 1 beef when compared to that of Australian black Angus or cross beef (p < 0.05), whereas it was not significantly different for top round and chuck tender. Intramuscular fat content was higher for QG $1^+$ Hanwoo beef strip loin (15.48%) than that in Australian cross beef (8.83%) and it was also higher in loin for QG $1^+$ (17%) and 1 (15.52%) Hanwoo beef than that in Australian Angus beef (10.59%) and cross beef (9.21%) (p < 0.05). The CIE $L^*$ value was significantly higher for Australian cross beef strip loin than that of Hanwoo beef but the CIE $a^*$ value was not significantly different between the same cuts from different origins. However, CIE $b^*$ values were significantly higher for the Australian cross beef than those for four cuts of Hanwoo beef and Australian Angus beef (p < 0.05). No significant difference in WBS of loin, top round, or chuck tender was observed among the different beef sample origins except that strip loin had significant higher WBS for Australian cross beef (3.02 kg) but lower for Australian Angus beef (2.13 kg). Australian cross beef contained significantly higher palmitic acid, stearic acid, linolenic acid, but lower palmitoleic acid, oleic acid, eicosenoic acid content in strip loin, loin, and top round than those of QG $1^+$ and 1 Hanwoo beef (p < 0.05). QG $1^+$ Hanwoo beef had significant lower saturated fatty acid and higher monounsaturated fatty acid content than those in Australian cross beef (p < 0.05). Hanwoo $1^+$ beef had more glycine in top round and chuck tender, whereas Hanwoo QG 1 beef and Australian Angus beef had higher cysteine, methione, and glycine levels in strip loin and loin and valine and leucine in top round and chuck tender than the same cuts of Hanwoo $1^+$ beef (p < 0.05). No significant differences were observed for Ca, Fe, or Zn content among the different beef samples.

관능특성 및 판별함수를 이용한 한우고기 맛 등급 분석

조수현,서그러운달님,김동훈,김재희,Cho, Soo-Hyun,Seo, Gu-Reo-Un-Dal-Nim,Kim, Dong-Hun,Kim, Jae-Hee 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.1

The objective of this study was to investigate the most effective analysis methods for palatability grading of Hanwoo beef by comparing the results of discriminant analysis with sensory data. The sensory data were obtained from sensory testing by 1,300 consumers evaluated tenderness, juiciness, flavor-likeness and overall acceptability of Hanwoo beef samples prepared by boiling, roasting and grilling cooking methods. For the discriminant analysis with one factor, overall acceptability, the linear discriminant functions and the non-parametric discriminant function with the Gaussian kernel were estimated. The linear discriminant functions were simple and easy to understand while the non-parametric discriminant functions were not explicit and had the problem of selection of kernel function and bandwidth. With the three palatability factors such as tenderness, juiciness and flavor-likeness, the canonical discriminant analysis was used and the ability of classification was calculated with the accurate classification rate and the error rate. The canonical discriminant analysis did not need the specific distributional assumptions and only used the principal component and canonical correlation. Also, it contained the function of 3 factors (tenderness, juiciness and flavor-likeness) and accurate classification rate was similar with the other discriminant methods. Therefore, the canonical discriminant analysis was the most proper method to analyze the palatability grading of Hanwoo beef.

1⁺⁺ 등급 거세한우의 부위별 칼로리, 콜레스테롤, 콜라겐, 유리아미노산, 핵산관련물질 및 지방산조성

조수현,성필남,김진형,박범영,백봉현,이연정,인태식,이종문,김동훈,안종남,Cho, Soo-Hyun,Seong, Pil-Nam,Kim, Jin-Hyoung,Park, Beom-Young,Baek, Bong-Hyun,Lee, Yeon-Jung,In, Tae-Sik,Lee, Jong-Moon,Kim, Dong-Hun,Ahn, Chong-Nam 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.3

This study was conducted to investigate the compositional properties by different cut of Hanwoo steer beef. 10 cuts [Abjin (short plate), Bosup (top sirloin), Cheggt (striploin), Dngsim (Ioin), Guri (chuck tender), Hongduke (eye of round), Moksim (chuck roll), Sulgit (bottom round), Udoon (top round), Yangji (brisket)] were prepared from 10 Hanwoo steers ($24{\sim}28$ mon old) were used for the experiment. Calorie contents were $2,205{\sim}3713.20\;cal/g$ and loin, striploin, short plate were significantly higher than the other cuts (p<0.05). Loin was highest in cholesterol content, whereas top round and eye of round were lowest among 10 cuts (p<0.05). There were no significant differences in soluble and insoluble collagen contents although chuck tender, chuck roll and bottom round contained significantly higher total collagen and loin and striploin contained significantly lower total collagen contents than the other cuts (p<0.05). The result from the analysis of free amino acids showed that glutamate and alanine contents were $275.99{\sim}536.04\;mg/100g$, $130.63{\sim}175.23\;mg/100g$, respectively and followed by arginine ($7.00{\sim}10.49\;mg/100g$), phenylalanine ($4.70{\sim}13.88\;mg/100g$), and leucine ($5.98{\sim}10.26\;mg/100g$) in 10 cuts. $1^{++}$ grade Hanwoo steer beef had significantly higher IMP (Inosine monophosphate) and inosine in eye of round (30.04% and 6.25%) and top round (33.44% and 6.28%), while hypoxanthine contents were significantly higher in chuck tender than the other cuts (p<0.05). In fatty acid analysis, there were not significantly differences in fatty acid composition among 10 cuts only except for C16:1n7, C20:3n6, and C20:4n6 (p>0.05).

사회인구학적 요인이 한우수소고기의 부위 및 유리형태별 관능특성에 미치는 영향

조수현 ( Soo Hyun Cho ),김진형 ( Jin Hyoung Kim ),김재희 ( Jae Hee Kim ),성필남 ( Pil Nam Seong ),박범영 ( Beom Young Park ),김경의 ( Kyung Eui Kim ),서그러운달님 ( Gureoundalnim Seo ),이종문 ( Jong Moon Lee ),김동훈 ( Dong Hun Ki 한국동물자원과학회 2007 한국축산학회지 Vol.49 No.6

황체호르몬 / 합성 황체호르몬이 혈관 긴장도에 미치는 영향

조수현(Soo Hyun Cho),김승룡(Seung Ryong Kim),김경헌(Kyoung Hun Kim),서정국(Jung Kook Suh) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.7

N/A Objectives : To evaluate the effects of progesterone/progestin and in combination with estrogen in relaxation of rat aorta. Methods : Eight weeks after bilateral oophorectomy, the descending aorta of Spague-Dawley rats (n=10) were quickly removed and placed in organ bath containing Krebs solution. Each aorta ring in 2-3 mm length was connected to an isometric force transducer (FT 03, Grass, USA) and the changes in tension were recorded with an AD converter system (MP 100, Biopac Inc, USA) in a personal computer. After precontraction of the rings with norepinephrine (1 umol/L) or KCI (40 mmol/L), estradiol, progesterone, medroxyprogesterone acetate (MPA), norethisterone acetate (NETA) (10-5-10-8 M/L in each) were added to each ring and they were incubated for 15 minutes. The relaxation was expressed as a percentage of the tonic contraction. Results : Estrogen relax the aorta in all concentrations. The degree of relaxation was dose dependent (P<0.001). All of the progesterone, MPA, NETA relax the aorta and the effects was different according to the concentration of steroids (P<0.0001). The degree of relaxation was not different between estrogen and those of progesterone, MPA, NETA except MPA 10-8 M, NETA 10-5 M. Addition of progesterone, MPA and NETA to the estrogen showed similar vascular effects compared to those of estrogen alone. Conclusion : Not only estrogen but also progesterone, MPA, and NETA acutely relax aorta. Progesterone/progestin have not been found attenuate the action of estrogen in our animal in vitro study.

숙성온도와 기간이 한우 거세우 배최장근의 육질 특성에 미치는 영향

김진형,조수현,성필남,하경희,김학균,박범영,이종문,김동훈,안종남,Kim, Jin-Hyoung,Cho, Soo-Hyun,Seong, Pil-Nam,Hah, Kyung-Hee,Kim, Hak-Kyun,Park, Beom-Young,Lee, Jong-Moon,Kim, Dong-Hun,Ahn, Chong-Nam 한국축산식품학회 2007 한국축산식품학회지 Vol.27 No.2

본 연구는 숙성온도와 숙성기간이 한우 거세우 배최장근의 육질 특성에 미치는 영향을 구명하고자 숙성온도를 0, $4^{\circ}C$로 하여 2, 7, 14, 21, 28, 49일 동안 숙성하면서 한우 거세우 배최장근의 pH, 전단력, MFI, 가열 및 육즙감량, 전자현미경 관찰, 관능검사 및 아미노산 조성을 분석하였다. pH는 숙성온도가 $0^{\circ}C$일 때 숙성 21일까지, 숙성온도가 $4^{\circ}C$일 때 숙성 14일까지 증가하다가 감소하였다(p<0.05). 전단력 값은 숙성 14일부터 28일까지 $4^{\circ}C$에서 숙성한 배최장근이 $4^{\circ}C$보다 유의적으로 낮았고, 숙성기간이 경과함에 따라 유의적으로 연도가 향상되었다(p<0.05). MFI의 경우 $4^{\circ}C$에서 숙성한 배최장근 보다 $0^{\circ}C$에서 높은 경향을 보였고, 숙성기간이 경과함에 따라 유의적으로 증가하였다(p<0.05). $0^{\circ}C$에서 숙성한 배최장근의 가열 및 육즙감량이 $4^{\circ}C$보다 적은 경향이었고, 숙성기간이 경과함에 따라 유의적으로 증가하였다(p<0.05). 관능검사에서 연도와 다즙성은 $0^{\circ}C$에서 숙성한 배최장근이 $4^{\circ}C$ 보다 좋은 평가를 보였고, 숙성기간이 경과하면서 유의적으로 높은 평가를 얻었다(p<0.05). 전자현미경에 의한 미세구조 변화는 $4^{\circ}C$에서 숙성한 배최장근이 $0^{\circ}C$보다 1주일 빠르게 Z-disk의 붕괴가 확실하게 관찰되었고, 숙성기간이 경과하면서 Z-disk의 붕괴정도가 많아졌다. 아미노산 함량 변화는 $4^{\circ}C$에서 숙성한 배최장근이 $0^{\circ}C$보다 높은 경향이었고, 숙성기간이 경과하면서 각 아미노산 조성의 함량이 유의적으로 증가하였다(p<0.05). 이상의 결과를 종합하면, 한우 거세우 등심의 최적 숙성 조건은 $0^{\circ}C$에서는 14일간, $4^{\circ}C$에서는 7일간 숙성하는 것이 바람직한 것으로 사료되며, 향후 숙성기술의 산업적 적용을 위하여 한우의 부위 및 근육별 적정 숙성기간 설정 연구가 필요할 것으로 생각된다. This study was conducted to investigate the effect of ageing temperature(0 and $4^{\circ}C$) and time(2, 7, 14, 21, 28, and 49 days) on the meat quality of longissimus muscle from Hanwoo steer. The pH, Warner-Bratzler shear force(WBSF), myofibrillar fragmentation index(MFI), cooking and purge loss, sensory, morphological changes, and amino acid composition were assessed. The pH of longissimus muscle increased significantly(p<0.05) for 21 days at $0^{\circ}C$ and 14 days at $4^{\circ}C$, but decreased thereafter. Longissimus muscle aged from 14 days to 28 days at $4^{\circ}C$ had a lower WBSF than longissimus muscle aged at $0^{\circ}C$(p<0.05). The WBSF of longissimus muscle decreased significantly(p<0.05) with ageing time. The MFI, cooking and purge loss, tenderness, and juiciness scores were higher for longissimus muscle aged at $4^{\circ}C$ than at $0^{\circ}C$. As ageing time increased, the MFI, cooking and purge loss, tenderness, juiciness, and amino acid composition of longissimus muscle increased significantly(p<0.05) with ageing at 0 or $4^{\circ}C$. Transmission electron microscopy showed Z-disk degradation and morphological changes of the myofibrils correlating with increased tenderness during the ageing time. Based on these results, the proper ageing conditions of longissimus muscle of Hanwoo steer were 14 days of ageing at $0^{\circ}C$ or 7 days of ageing at $4^{\circ}C$. However, further study on the application of ageing technology to this industry is necessary for the optimization of ageing conditions for the sub-primals or muscles from Hanwoo beef.

액란의 냉장저장 중 미생물 및 이화학적 성상

강근호,조수현,성필남,박범영,함준상,정석근,김동훈,채현석,Kang, Geun-Ho,Cho, Soo-Hyun,Seong, Pil-Nam,Park, Beom-Young,Ham, Jun-Sang,Jeong, Seok-Geun,Kim, Dong-Hun,Chae, Hyun-Seok 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.4

본 연구는 국내에서 유통되고 있는 액란의 냉장저장 중 미생물 및 이화학적 성상을 구명하기 위해 수행하였다. 본 실험에 사용된 액란은 살균 및 비살균 처리된 전란액, 난황액 및 난백액으로 여름철과 겨울철 생산 제품에 대해 각각 조사하였다. 냉장저장 중 세균수의 경우 여름철에 생산된 비살균 액란(전란액, 난황액 및 난백액)은 1,270-83,300 CFU/g 수준으로 겨울철에 생산된 비살균 액란의 0-4,330 CFU/g 에 비해 증가하는 것으로 나타났다. 살균 전란액과 살균 난황액에서는 저장기간 동안 액란생산 계절과 관계 없이 대장균군이 검출되지 않는 것으로 나타났다. 반면, 비살균 액란은 냉장저장 중 겨울철에 생산된 난백액에서만 대장균군이 검출되지 않는 것으로 나타났다. Salmonella는 살균 및 비살균 액란 모두에서 냉장저장 중 액란 생산 계절과 관계없이 검출되지 않았다. 그러나, 여름철에 생산된 비살균 전란액으로부터 Salmonella 의심균을 동정한 결과, Pseudomonas sp, Pseudomonas geezenne, Pseudomonas otitidis, Pseudomonas aeruginosa인 것으로 판명되었다. 액란의 냉장저장 중 pH 및 점도변화는 살균과 비살균 처리구간 뚜렷한 차이가 없는 것으로 나타났다. 이상의 결과를 종합해 볼 때 여름철에 비살균 액란 생산시 교차오염에 각별한 주의가 필요할 것으로 사료된다. The study was performed to investigate microbial and physicochemical properties of domestic liquid eggs during cold storage. The liquid eggs used in the experiment were whole liquid, liquid egg yolks, and liquid egg whites. All samples were analyzed in summer and winter. The aerobic microorganisms were 1,270-83,300 CFU/g from non-sterilized liquid eggs produced in summer and their numbers increased from those produced in winter (ND, ~4,330 CFU/g). Total coliforms were not observed in non-sterilized whole liquid and non-sterilized liquid egg yolk regardless of season. Total coliforms from nonsterilized products were not detected in liquid egg whites during cold storage. Salmonella sp. was not observed in any of the liquid egg products. However, Pseudomonas sp., Pseudomonas geezennei, Pseudomonas otitidis, and Pseudomonas aeruginosa were identified by 16S rRNA from non-sterilized whole liquid eggs produced in summer. The pH and viscosity of whole liquid eggs and liquid egg whites were not different between the sterilized and non-sterilized treatments during cold storage. These results suggest that managing cross-contamination is necessary when non-sterilized liquid eggs are processed in summer.

브랜드 한우고기의 연도예측을 위한 전단력과 관능특성의 상관관계

김진형,조수현,성필남,정다운,인태식,하경희,정명옥,박범영,이종문,김동훈,Kim, Jin-Hyoung,Cho, Soo-Hyun,Seong, Pil-Nam,Jeong, Da-Woon,In, Tae-Sik,Hah, Kyung-Hee,Jung, Meyung-Ok,Park, Beom-Young,Lee, Jong-Moon,Kim, Dong-Hun 한국축산식품학회 2009 한국축산식품학회지 Vol.29 No.1

The aim of this study was to determine the relationship between sensory properties and Warner-Bratzler shear (WBS) for branded Hanwoo beef. Eight subprimal cuts purchased from the branded Hanwoo beef of 3 quality grades ($1^{++}$, $1^+$, 1) at 13 stores were determined the tenderness using WBS and evaluated the sensory properties (tenderness, flavor, juiciness, overall acceptance) by trained sensory panels. The results of sensory evaluation were analyzed by four WBS value classes (<3.46 kg, 3.46-4.09 kg, 4.09-4.72 kg, >4.72 kg). The results from the sensory evaluation (tenderness, flavor, juiciness, overall acceptance) for subprimal cuts of WBS force value less than 3.46 kg had high scores, whereas WBS force value more than 4.72 kg had low scores (p<0.05). Correlation coefficient of WBS measurements with sensory ratings was -0.67 (tenderness), -0.53 (flavor), -0.49 (juiciness), and -0.57 (overall acceptance). From these results, consumers can distinguish sensory taste of branded Hanwoo beef using WBS categories and beef industry can apply index of taste for brand Hanwoo beef by WBS categories.