• 한국축산식품학회지
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• 제42권3호
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• pp.455-466
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• 2022

The aim of this study was to assess the occurrence of white striping (WS), wooden breast (WB), and WS combined with WS/WB muscle abnormalities in broilers (Ross 500) at different slaughter ages (34, 41, and 48 d). In addition, the influence of these muscle abnormalities at different slaughter ages on quality characteristics (physical dimensions, pH, color index, and chemical composition) was studied. Overall occurrence of muscle abnormalities was 45%, 92%, and 100% at slaughter ages of 34, 41, and 48 d, respectively. It was found that about 39% from the occurrence of muscle abnormalities was not similar in the same bird (left and right fillets). Breast fillets affected by muscle abnormalities had significantly (p<0.05) higher weight than normal fillets. At slaughter age of 34 d, normal fillets had significantly higher L^* (67.37 vs. 61.73 and 63.05, p<0.05), lower a^* (3.25 vs. 4.87 and 5.18, p<0.05) and b^* (4.02 vs. 5.20 and 5.99, p<0.05) than WS and WS combined with WB fillets; respectively. The changes in chemical composition due to muscle abnormalities were more significant at high slaughter age than at low slaughter age. In conclusion, the occurrence of muscle abnormalities was strongly influenced by slaughter age. Moreover, breast fillets affected by muscle abnormalities had different quality characteristics (proximate composition, color traits, and dimensions) in comparison to normal fillets.

• The Journal of Korean Physical Therapy
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• 제28권2호
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• pp.136-141
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• 2016

Purpose: In this study experiments were performed during 6 weeks with 40 adults, 20 subjects in the waist stabilization exercise with blood flow restriction group and 20 subjects in the waist stabilization exercise without blood flow restriction group, in order to determine the impact of waist stabilization exercise on White Area Index (WAI) followed by blood flow restriction. Methods: Thickness of external oblique abdominal muscle, internal oblique abdominal muscle, and transversus abdominis muscle, as well as density and WAI of external oblique abdominal muscle were measured, followed by performance of repeated ANOVA. Results: Significant difference in thickness of external oblique abdominal muscle according to periodical difference was observed between groups (p<0.05). Significant difference in thickness of internal oblique abdominal muscle and transversus abdominis muscle according to periodical difference was observed between groups (p<0.05). Significant difference in density and WAI of external oblique abdominal muscle according to periodical difference was observed between groups (p<0.05). Conclusion: In conclusion, significant difference was observed after waist stabilization exercise with blood flow restriction. These results can be used as basic data for future research on waist stabilization exercise and blood flow restriction exercise.

• 대한임상전기생리학회지
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• 제11권1호
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• pp.21-29
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• 2013

Purpose : The purpose of this study was to determine the changes in ultrasound imaging of the lower limbs in patients with degenerative osteoarthritis who received a total knee replacement (TKR). Methods : The participants for the study were ten patients who were to receive a total knee replacement. Measurements were taken a total of three times: before receiving a total knee replacement, and one week and two weeks after receiving a total knee replacement. The vastus medialis, rectus femoris muscle, tibialis anterior and gastrocnemius muscle were measured using ultrasound imaging. Results : Muscle thickness of the vastus medialis, rectus femoris muscle, tibialis anterior and gastrocnemius muscle had no significant interaction over time whether surgery was performed or not. White area index (WAI) and density of vastus medialis, rectus femoris muscle, tibialis anterior and gastrocnemius muscle had no significant interaction over time whether surgery was performed or not. Conclusion : In conclusion, lower quality muscles were due to a decrease in muscle fiber and an increase in fat fiber. Therefore, initial physical therapy after total knee replacement should consider this point and be designed appropriately as a therapeutic approach for total knee replacement patients.

• The Journal of Korean Physical Therapy
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• 제19권2호
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• pp.11-19
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• 2007

Purpose: The purpose of this study were to analyze ultrasonography on both sides of gastrocnemius medialis of stroke patient. Methods: In fourteen subjects with stroke, the gastrocnemius medialis(GM) muscle were scanned with ultrasonography at the muscle belly at rest at ankle angles of 0 degree (neutral position) and it were measured with ultrasonography on both sides of the leg. Muscle architecture (thickness, pennation angle, fascicle length, density, white area index) was examined using real-time B-mode ultrasonography with 7.5MHz linear-array prob. Results: Thickness of non-paratic side was significantly thicker than paratic side. Pennation angle of non-paratic side was significantly larger than paratic side. Fascicle length of non-para tic side was significantly smaller than paratic side. Density of non-paratic side was significantly smaller than paratic side. White area index of non-paranc side was significantly smaller than paratic side. Conclusion: This study showed that stroke have influenced on mechanical properties and quality properties of skeletal muscle architecture.

• Asian-Australasian Journal of Animal Sciences
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• 제20권3호
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• pp.307-312
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• 2007

The present study was carried out to investigate differentially expressed chicken muscle proteins using proteomics approach. More than 300 protein spots were investigated for the muscle samples in 2DE gels and the differentially expressed protein spots between pectoralis and peroneus longus muscles from Cornish and White Leghorn breeds were characterized by MALDI-TOF. In pectoralis muscles, PGAM1 protein was detected as differentially expressed between White Leghorn and Cornish breeds. On the other hand, 4 protein spots (SP22, nxf-2, SOD1, TNNI2) were differentially expressed between White Leghorn and Cornish breeds in peroneus longus muscles. These proteins assumed to be related with muscle development, growth, stress, and movements in chicken. In this experimental process, 2D reference map of the chicken muscle proteins was needed and 25 proteins, which were commonly expressed in both pectoralis and peroneus longus muscles in both breeds, were selected and characterized. Upon finishing the exact roles of the differentially expressed proteins, the identified 5 proteins will be used as valuable information for the fundamental mechanisms of muscle biology and underline genetics.

• The Korean Journal of Physiology and Pharmacology
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• 제7권4호
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• pp.207-210
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• 2003

Lipids play many structural and metabolic roles, and dietary fat has great impact on metabolism and health. Fatty acid oxidation rate is dependent on tissue types. However there has been no report on the relationship between the rate of fatty acid oxidation and carnitine transport system in outer mitochondrial membrane of many tissues. In this study, the rate of fatty acid oxidation and carnitine palmitoyltransferase (CPT) I activity in the carnitine transport system were measured to understand the metabolic characteristics of fatty acid in various tissues. Palmitic acid oxidation rate and CPT I activity in various tissues were measured. Tissues were obtained from the white and red skeletal muscles, heart, liver, kidney and brain of rats. The highest lipid oxidation rate was demonstrated in the cardiac muscle, and the lowest oxidation rate was in brain. Red gastrocnemius muscle followed to the cardiac muscle. Lipid oxidation rates of kidney, white gastrocnemius muscle and liver were similar, ranging from 101 to 126 DPM/mg/hr. CPT I activity in the cardiac muscle was the highest, red gastrocnemius muscle followed by liver. Brain tissue showed the lowest CPT I activity as well as lipid oxidation rate, although the values were not significantly different from those of kidney and white gastrocnemius muscle. Therefore, lipid oxidation rate was highly (p＜0.001) related to CPT I activity. Lipid oxidation rate is variable, depending on tissue types, and is highly (p＜0.001) related to CPT I activity. CPT I activity may be a good marker to indicate lipid oxidation capacity in various tissues.

• Journal of Yeungnam Medical Science
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• 제35권2호
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• pp.213-218
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• 2018

Background: Body fats, especially both of abdominal fat pad mass and skeletal muscle fat content, are inversely related to insulin action. Therefore, methods for decreasing visceral fat mass and muscle triglyceride content may be helpful for the prevention of insulin resistance. Methods: Thalidomide, used for its anti-angiogenic and anti-inflammatory properties, was administered to rats for 4 weeks. A 10% solution of thalidomide in dimethyl sulfoxide was injected daily into the peritoneal cavity as much as 100 mg/kg of body weight. Results: The total visceral fat pad mass in the thalidomide-treated group was 11% lower than in the control group. The size of adipocytes of the epididymal fat pad mass in the thalidomide-treated group was smaller than in the control group. The intraperitoneal thalidomide treatment increased triglyceride concentrations by 16% in the red muscle, but not in the white muscle. Conclusion: The results suggested that intraperitoneal thalidomide treatment inhibited abdominal fat accumulation, and that the free fatty acids in the blood were preferentially accumulated in the red muscle rather than in the white muscle.

• 한국전문물리치료학회지
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• 제13권1호
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• pp.47-53
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• 2006

Since ultrasound has different reflections depending on components of organization, analysis of ultrasound images of skeletal muscle can offer both quantitative and qualitative reports as concerns skeletal muscle structure. This study is focused on the ultrasound method for evaluating the structural characteristics of skeletal muscle and also conducted to examine its practicality. After obtaining images of the elbow flexors from an ultrasound image device with 88 normal subjects whose ages were between twenty and seventy years old (44 men and 44 women), muscular density and white area index (WAI) which indicated structural characteristics of skeletal muscle were analyzed with gray scale analysis. The study examined correlations between subject's age and items which obtained from measuring ultrasound images and the differences in relations to sex and age. Muscular density and WAI had a high correlation with age and were significantly increased in men and women with greater age. The quantitative evaluation method of skeletal muscle structure which analyzed the ultrasound images has high practicality because it is a non-invasive method which complements physical therapy diagnosis and research methods and promotes functionality evaluation.

• 한국조리학회지
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• 제21권5호
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• pp.147-159
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• 2015

한국인의 주식인 쌀 중심의 식사패턴은 다양한 식품군의 섭취와 영양의 균형을 얻을 수 있는 장점을 가지고 있다. 따라서 본 연구에서는 노화과정에서 생리적 기능 저하에 따른 노인기 쉽게 야기될 수 있는 영양의 불균형으로 인한 영양결핍이 쌀을 중심으로 한 식사 패턴이 노인기 근육량에 미치는 영향에 대해 살펴보고자 하였다. 본 연구 대상자는 2010년 제5기 국민건강영양조사 자료를 이용한 60세 이상 노인 남녀 각각 658명, 775명을 대상으로 연구하였다. 연구 결과로 특히 남성의 경우, 결혼 및 배우자 유무 그리고 교육 수준에 따라 쌀의 섭취량에 유의적 차이가 있음을 알 수 있었다. 본 연구의 흥미로운 점은 노인기 남녀 모두 쌀 섭취량이 높을수록 더 높은 근육량을 보여주었다. 또한 쌀 섭취가 높을수록 육류 섭취가 낮았고, 다른 곡물, 면류, 만두류, 밀 및 빵에 대한 섭취가 남녀 모두 낮았다. 노인기의 식사패턴에서 쌀 섭취량의 증가가 근감소와 대사관련 위험 요인에 대한 위험도를 낮추어 주었다. 그러나 쌀 섭취량과 포도당 대사의 위험성에 대한 결과는 유의한 차이를 나타내지 않았다. 본 연구의 결과를 통해 노인기에 충분한 쌀 섭취를 통한 식사 패턴은 근감소와 대사증의 위험 지표에 영향을 미친다는 것을 살펴볼 수 있었다.

• Journal of Nutrition and Health
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• 제52권6호
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• pp.581-592
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• 2019

본 연구는 에너지 섭취 급원에 따라 골격근육량과 에너지 섭취량 간의 연관성이 달라지는지 알아보기 위해 수행되었다. 본 연구는 2008 ~ 2010년도 국민건강영양조사 자료를 이용하여 30세 이상 한국 성인 7,922명을 대상으로 각 식품의 에너지섭취비율을 기반으로 식사패턴을 분류하고 각 식사패턴 군집 내에서 대상자들의 골격근육량과 에너지 섭취량 간의 연관성을 분석하였다. 대상자의 22가지 식품군의 에너지 섭취량을 기준으로 군집분석을 실시한 결과 남성과 여성 모두에서 '밀가루와 유지류 (Flour, Animal fat)', '흰 쌀 (White rice)', '건강혼합식 (Healthy mixed diet)' 3가지 식사패턴을 도출하였다. 그 중 '흰 쌀' 식사패턴에서 남성 (p < 0.0001)과 여성 (p < 0.0195) 모두 에너지 섭취량과 골격근육량의 연관성이 있었으며, 나머지 식사패턴에서는 근육량과 에너지 섭취량 간의 관련성이 통계적으로 유의하지 않았다. 본 연구의 결과에서 30대 이상 한국 성인들의 골격근육량의 변화와 에너지 섭취량 간에는 유의한 양적 연관성이 있으나 대상자가 주로 섭취하는 식사 형태에 따라 에너지 섭취와 골격근육량의 연관성이 다른 것을 알 수 있었다. 본 연구의 결과에 근거하여, 골격근육량과 연관된 에너지 섭취량의 변화 [14]는 쌀밥 위주의 식사를 하는 한국 성인에 특이적인 결과임을 추정할 수 있다. 이는 에너지 섭취량의 증가 없이도 군집에 속한 식품의 영양소 균형이 골격근육량 유지에 도움을 주는 다른 식사패턴 (예, 건강혼합식)과는 달리 쌀밥위주의 식사가 전형적인 한국인의 경우 전체적인 식사량의 확보도 골격근육 유지에 중요함을 제시하는 결과이며 쌀밥 위주의 식사를 하는 대상자들의 체중감량식단이나 근감소증 비율이 상대적으로 높은 노인들의 식사 지침에 응용할 수 있을 것으로 기대된다.