• Title/Summary/Keyword: korean beef

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Studies on the Digestion of Beef by Ficin Treatment V. A Transmission Electron Microscopic Observation (Ficin 처리시 우육의 단백질 분해에 관한 연구 V. 투과형 전자현미경에 의한 관찰)

  • 김정숙
    • The Korean Journal of Food And Nutrition
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    • v.2 no.2
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    • pp.21-26
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    • 1989
  • The morphological changes of fresh beef treated with ficin(0.1% : 2 hrs, 6 hrs)were examined with transmission electron microscope(TEM), the results obtained were as follows ; Connective tissue protein in fresh beef treated with ficin became gradually fragmentation and was occurred solubilization with time The length of sarcomere in myofibrillar protein was elongated, M-line became dim, and the 1-band of Z-line was broken and beck me fragmentation with time.

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Effects of Temperature and Glycolysis Rate on Tenderness of Hanwoo Beef at 24 h Postmortem

  • Moon, Sung-Sil;Ko, Kyung-Hee;Park, Yong-Hyun;Park, Su-Min
    • Proceedings of the Korean Society for Food Science of Animal Resources Conference
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    • 2006.05a
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    • pp.90-93
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    • 2006
  • Our results indicate that muscle temperature and glycolysis rate of pre-rigor could be closely related to Hanwoo beef tenderness at 24 h postmortem and have potential to predict beef tenderness at 24 h postmortem.

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Microbial Distribution in Refrigerated Beef (냉장 우육내의 미생물의 분포)

  • 정해만;조광필
    • Korean Journal of Microbiology
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    • v.29 no.3
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    • pp.195-198
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    • 1991
  • Isolation and identification of mesophilic and psychrotrophic bacteria distributed in Korean refrigerated beef were attempted. Total isolated colonies were 192, and identified as 5 genera and 10 species. Among them, mesophilic bacteria were Enterobacter aerogenes, E. agglomerans, Serratia liquefaciens, Proteus mirabilis, and "psychrotrophic" bacteria were Pseudomons fluorescens, P. putida, P. pickettii, P. mendocina, P. stutzeri, Alcaligenes faecalis. Dominant species was Serratia liquefaciens as mesophiles, and Pseudomonas putida as psychrotroph.chrotroph.

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Studies on the Digestion of Beef by Ficin Treatment : III. A Scanning Electron Microscapic Observation (Ficin처리시 우육의 단백질 분해에 관한 연구 III. 주사형 전자 현미경에 의한 관찰)

  • 김정숙
    • The Korean Journal of Food And Nutrition
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    • v.1 no.2
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    • pp.1-8
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    • 1988
  • The morphological changes of fresh beef treated with ficin(0.1% : 35$^{\circ}C$ 2hrs, 6hr,) were examined with scanning electron microscope(SEM), the results obtained were as follows ; Connective tissue protein in fresh beef treated with ficin was occurred solubilization with time and gradually trasformed from a definite form into amorphous form, followed by showing an opening-up phenomenon again and subdivision. Myofibrillar protein was cracked and breaked slightly, followed subdivision with time.

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Studies on the Digestion of Beef by Ficin Treatment : IV. An Optical Microscopic Observation (Ficin처리시 우육의 단백질 분해에 관한 연구 IV. 광학 현미경에 의한 관찰)

  • 김정숙;주순재
    • The Korean Journal of Food And Nutrition
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    • v.1 no.2
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    • pp.9-17
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    • 1988
  • The morphological changes of fresh beef treated with ficin(0.1% : 2hrs, 6hrs) were examined with optical microscope (OM, LM), the results obtained were as follows : Connective tissue protein in fresh beef treated with ficin was occurred swelling and separation of endomysial reticulum with time, followed showing granulation and solubilization slightly. Myofibrillar protein was loosed wavy contractile muscle fiber, and showed erosin, cracks and breaks in fibers with time.

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The Dynamics of Agricultural Commodities and Their Responses to Disruptions of Considerable Magnitude

  • Conrad Stephen H.
    • Korean System Dynamics Review
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    • v.6 no.1
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    • pp.17-32
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    • 2005
  • An agricultural commodity production cycle model consisting of corn, beef, and dairy sectors was constructed for the purpose of exploring the propagating effects of large-scale disruptive events. In an initial proof-of-concept exercise, we considered an agricultural disruption scenario in which foot-and-mouth disease (FMD) is introduced into the U.S., causing a large-scale outbreak of the disease in both beef and dairy cattle. The magnitude of disruption to the beef and dairy sectors are presented under the existing W response policy and then improvements under two alternative policies are shown.

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A Study on the Long Term Demand Estimation for the Livestock Products (축산물(畜産物) 수요(需要)의 장기여측(長期予測)에 관(關)한 연구(硏究))

  • Kim, Chul Ho
    • Korean Journal of Agricultural Science
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    • v.10 no.2
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    • pp.393-405
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    • 1983
  • The demand for livestock and poultry products including beef, pork, chicken, egg and milk whose income elasticities are relatively higher than other staple foods, has been increased significantly during the past two decades in response to the remarkable increase in per capita GNP. This trend will be continued during the fifth and the sixth five year economic development plan period beginning with 1982. The annual GNP growth rate will be 7.5% on the average during the next 10 years. It is greatly needed to estimate the demand for beef, pork, chicken egg and milk and to study the feasibilities of domestic production of livestock products for the formulation of adequate policies in order to equate the consumption and the production during the 1980s. So this study reviewed the possible changes in the food consumption patterns during the 1980s, estimated the demand for beef, pork, chicken, egg and milk by using empirical demand functions and finally made suggestions for the formulation of long term price stabilization policies for each livestock, poultry and dairy products through the equilibrium of the quantity of demand for and supply of the products. There are many factors affecting the demand for meats, but this study considered own price, prices of supplements and substitutes and per capita income as the independent variables in the demand equations. It was found that it's own price and income were most significantly affecting factors among others and the degree of substitution effects were remarkably different among the products. According to the meat demand derived in this study, per capita consumption of beef, pork and chicken in the base year 1982 was 11.2kg for total meat, 2.5kg beef, 6.0kg pork and 2.5kg chicken, 106 pieces egg, 15.1kg milk respectively, while those in 1991 were 19.3kg for total meat, 4.8kg beef, 9.6kg pork, 4.9kg chicken, 133pieces egg and 44.1kg milk. It is also predicted through this study that, when the level of production costs be maintained, the domestic production of pork and chicken will meet the demand for them during the fifth and sixth five year economic plan period. However, there will be chronic shortage of beef supply during the coming years. The annual import requirement will be 30,000tons to 40,000tons during the period. In order to stabilize the domestic livestock and poultry and dairy products market, the government should introduce measures to curb the increase in beef consumption by encouraging the consumption of pork and chicken. For this, the livestock production policy measures should be concentrated on : 1) the improvement of infrastructures of beef production by introducing advanced feeding and management technology, subsidies for the establishment of facilities and price support programs for farmers : 2) the development of dairy beef : 3) the reinforcement of the forecast systems for pork and chicken production and consumption.

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Combined Effects of Modified Atmosphere Packaging and Organic Acid Salts (Sodium Acetate and Calcium Lactate) on the Quality and Shelf-life of Hanwoo Ground Beef Patties

  • Muhlisin, Muhlisin;Kang, Sun-Moon;Choi, Won-Hee;Lee, Keun-Taik;Cheong, Sung-Hee;Lee, Sung-Ki
    • Food Science of Animal Resources
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    • v.30 no.4
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    • pp.685-694
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    • 2010
  • The present study investigated the combined effects of modified atmosphere packaging (MAP) and organic acid salts on the quality and shelf-life of Hanwoo ground beef patties. The ground beef containing 500 ppm of ascorbic acid was prepared with air-packaging (Air-P), high oxygen-MAP (70% $O_2$+30% $CO_2$/OxyMAP), and nitrogen-MAP (100% $N_2$/NitroMAP), in combination with organic acid salts (1500 ppm of sodium acetate and 500 ppm of calcium lactate). The samples were stored for 11 d at $5^{\circ}C$. The pH value of ground beef patties decreased during storage in all the treatments. The ground beef patties with organic acid salts showed relatively higher level of pH during storage compared with non-added patties (p<0.05). Lipid oxidation was accelerated in OxyMAP while it was delayed in NitroMAP treated with organic acid salts. Nitro-MAP treated with organic acid salts was effective in stabilizing the color characteristics of lightness (CIE $L^*$) and redness (CIE $a^*$) during storage. Oxygen content in MAP was shown to be a more important factor affecting color stability and lipid oxidation of ground beef than organic acid salts. The aerobic and anaerobic bacterial counts were reduced both in OxyMAP and NitroMAP (p<0.05), and the lactic acid bacteria was inhibited by Oxy-MAP (p<0.05). Coliform bacteria decreased during storage as pH value was decreased in all treatments. According to the sensory evaluation, the ground beef patties in NitroMAP showed the best quality among all treatments during storage. Therefore, Hanwoo ground beef patties added with sodium acetate and calcium lactate and packed with NitroMAP showed better quality characteristics than other treatments. This packaging method is recommended and could be utilized for packaging hanwoo ground beef patties for improving quality and extending shelf-life.

A Study on the Characteristics of Purchasing Propensity by Preferences Quality Grade of Hanwoo Beef (한우고기 육질등급 선호도에 따른 구매성향 특성 분석연구)

  • Cho, Soohyun;Shin, Jeong-Seop;Seol, Kuk-Hwan;Kim, Yoon-Seok;Kang, Sun-Moon;Seo, Hyun-Woo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.3
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    • pp.537-544
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    • 2020
  • Beef consumption trends are changing according to consumer needs and preferences. This study was conducted to collect the fundamental information by investigating the consumer's preference and purchase propensity of beef(Hanwoo beef) for improvement of Korean beef grading system. Consumers were recruited from Seoul, Gyeonggi-do, and 5 metropolitan cities, and surveyed from July 24 ~ August 14, 2017. The data obtained from 362 consumers were finally selected for the verification process. Results from the Hierarchical Regression Analysis reveal that the increased purchasing frequency is positively correlated with the following factors, in the consumer group showing preference in the Quality Grade (QG) of beef: marbling type 1QG, fat color 1+QG, and income, grade opinion, marbling contents and type 1++QG. Conversely, no factor affected the increased purchasing frequency in the consumer group having no preferred QG for beef (p>0.05). Our study determined significant differences in the factors affecting increased purchase frequency of beef among the different groups, classified depending on their preferred QG. The grading system is important since it directly correlates with profit for livestock farmers and the industry. We therefore propose that the grading criteria need to be revised reasonably but scientifically, considering various opinions of the producers and consumers.

Determination of Optimal Storage Condition for Pre-packed Hanwoo Loin

  • Seol, Kuk-Hwan;Park, Tu San;Oh, Mi-Hwa;Park, Beom-Young;Cho, Seong In;Lee, Mooha
    • Food Science of Animal Resources
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    • v.33 no.3
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    • pp.390-394
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    • 2013
  • The aim of this study was to determine the optimal storage condition of pre-packed Hanwoo beef without freezing. Hanwoo loin was purchased from a local distributor at 48 h after slaughter, then sliced in $1.5{\pm}0.5$ cm thickness, and packed in a polyethylene (PE) tray covered with linear low-density polyethylene (LLDPE) film. The studied factors to set the optimal storage condition were chamber temperature (5, 2.5 and $-1^{\circ}C$ for 14 d), cooling method (direct and indirect cooling system), and ultraviolet (UV) light irradiation for beef surface sterilization (0, 30, 60, and 120 min). The changes of pH, thiobarbituric acid reactive substances (TBARS) and number of aerobic bacteria were measured during storage. Beef samples stored in $-1^{\circ}C$ showed the minimal increasing rate in TBARS and microbial growth. After 15 d of storage, there was no significant difference in pH and TBARS values. However, the microbial population of beef stored in direct type cooling chamber ($4.25{\pm}0.66$ Log CFU/g) was significantly lower than that of beef stored in indirect type chamber ($6.47{\pm}0.08$ Log CFU/g) (p<0.05). After 4 d of storage, 60 or 120 min UV light irradiated beef samples showed significantly lower microbial population, and at 14 d of storage, 60 min UV irradiated beef sample showed significantly lower microbial population ($3.14{\pm}0.43$ Log CFU/g) than control ($4.46{\pm}0.13$ Log CFU/g) (p<0.05). However, TBARS values of 60 or 120 min UV light irradiated beef samples were significantly higher than non-irradiated beef sample after 4 d of storage (p<0.05).