Youn‐Chul Ryu

ORCID: 0000-0001-8940-624X
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About
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Research Areas
  • Meat and Animal Product Quality
  • Animal Nutrition and Physiology
  • Animal Behavior and Welfare Studies
  • Genetic and phenotypic traits in livestock
  • Food Quality and Safety Studies
  • Nutrition, Health and Food Behavior
  • Muscle metabolism and nutrition
  • Genetic Mapping and Diversity in Plants and Animals
  • Muscle Physiology and Disorders
  • Adipose Tissue and Metabolism
  • Veterinary Equine Medical Research
  • Phytochemicals and Antioxidant Activities
  • Rabbits: Nutrition, Reproduction, Health
  • Protein Hydrolysis and Bioactive Peptides
  • Exercise and Physiological Responses
  • Agriculture Sustainability and Environmental Impact
  • Selenium in Biological Systems
  • Genomics, phytochemicals, and oxidative stress
  • Agriculture, Soil, Plant Science
  • Insect Utilization and Effects
  • Sports Performance and Training
  • Diverse Topics in Contemporary Research
  • Mangiferin and Mango Extracts
  • Bee Products Chemical Analysis
  • Molecular Biology Techniques and Applications

Jeju National University
2015-2024

Korea Institute for Animal Products Quality Evaluation
2013

Korea University
2000-2008

Muscle development and lipid accumulation in muscle critically affect meat quality of livestock. However, the genetic factors underlying myofiber-type specification intramuscular fat (IMF) remain to be elucidated. Using two independent intercrosses between Western commercial breeds Korean native pigs (KNPs) a joint linkage-linkage disequilibrium analysis, we identified 488.1-kb region on porcine chromosome 12 that affects both reddish color (a*) IMF. In this critical region, only MYH3 gene,...

10.1371/journal.pgen.1008279 article EN cc-by PLoS Genetics 2019-10-11

The purpose of the present study was to investigate variations in histochemical characteristics muscle samples segregated according metabolic rates (MR) and pork quality attributes. A total 231 crossbred Duroc × (Yorkshire Landrace) pigs evaluated. Samples LM were taken evaluate characteristics, postmortem MR, meat quality. classified into fast, normal, slow MR groups based on pH at 45 min R-value. Drip loss lightness (L*) used assign 1 4 classes. Pale, soft, exudative belonging fast group...

10.2527/2006.844894x article EN Journal of Animal Science 2006-04-01

The ubiquitin proteasome system (UPS) degrades abnormal proteins and most unneeded normal proteins, thereby playing a critical role in protein homeostasis the cell. Proteasome inhibition is effective treating certain forms of cancer, while UPS dysfunction increasingly implicated pathogenesis many severe yet common diseases. It has been previously shown that doxorubicin (Dox) enhances degradation surrogate substrate mouse hearts. To address underlying mechanism, present study, we report 1)...

10.1152/ajpheart.01052.2008 article EN AJP Heart and Circulatory Physiology 2008-10-31

The objective of this study was to determine effects aging methods (wet-aged, dry-aged, and packaged dry-aged) during 60 d on quality traits microbial characteristics beef. Wet-aged beef packed by vacuum packaging stored in a 4°C refrigerator. Dry-aged used without packaging. Packaged dry-aged commercial bags. samples were meat ager at 2°C-4°C with 85%-90% relative humidity. Meat color, crust thickness, loss, cooking Warner-Bratzler shear force (WBSF), texture profile analysis, Torrymeter,...

10.5851/kosfa.2022.e63 article EN cc-by-nc Food Science of Animal Resources 2022-10-21

This study examined the effects of supplemental dietary selenium on growth performance, lipid oxidation, and color stability broiler chicks. Male chicks (Arbor Acres, 1 d old, total 900 chicks) were randomly assigned to 6 pens containing 30 each, corresponding each treatments. Six different diets supplied from 3 wk age. After 42 feeding, all broilers slaughtered conventionally at a slaughtering plant. The carcasses packed in polyethylene bags manner similar that used for retail trade stored...

10.1093/ps/84.5.809 article EN cc-by-nc-nd Poultry Science 2005-05-01

A total of six fiber types, including four pure types (type I, IIA, IIX, and IIB) two hybrid IIAX IIXB), were classified according to the expression myosin heavy chain (MHC) isoforms by immunohistochemistry with MHC specific monoclonal antibodies. The comparison muscle characteristics pork quality between groups (DFD: dark, firm, dry; PSE: pale, soft, exudative; RFN: reddish pink, nonexudative; RSE: exudative) pH, drip loss, lightness was conducted relationship myofiber investigated. DFD...

10.2527/jas.2013-6614 article EN Journal of Animal Science 2013-08-30

Jeju black cattle are known as one of Korea's traditional cattle. However, Hanwoo is more well-known to Korean meat consumers representative beef Despite the popularity these two breeds, comparison nutritional characteristics between and have not been studied. Here, we compared fatty acid amino Wagyu breeds. A total 62 were used in this study. The had significantly higher unsaturated acids than (p<0.05). Savory acids, including oleic also negative flavor such palmitic lower (p<0.001). On...

10.5851/kosfa.2019.e33 article EN cc-by-nc Food Science of Animal Resources 2019-04-12

The aim of this study was to investigate the histochemical parameters muscle fibers, and estimate correlation between these histological carcass traits in pigs.A total 230 crossbred Duroc×(Yorkshire×Landrace) pigs (149 gilts 81 castrated male pigs) evaluated.Carcass (carcass weight, backfat thickness, loin eye area), fiber size (crosssectional area, diameter, perimeter), number (density fibers/mm 2 fibers), type composition (percentages myofibers relative areas each type) were evaluated.Mean...

10.5713/ajas.2004.428 article EN cc-by Asian-Australasian Journal of Animal Sciences 2004-01-01

Abstract The Jeju horse, indigenous to the Island in Korea may have originated from Mongolian horses. Adaptations local harsh environment conferred horse with unique traits such as small-sized body, stocky head, and shorter limbs. These characteristics not been studied previously at genomic level. Therefore, we sequenced compared genome of 41 horses belonging 6 breeds. We identified numerous breed-specific non-synonymous SNPs loss-of-function mutants. Demographic admixture analyses showed...

10.1038/s41598-019-53102-8 article EN cc-by Scientific Reports 2019-11-13

ABSTRACT This study examined the effect of myosin heavy chain (MHC) isoforms on muscle fiber characteristics, protein denaturation and meat quality in porcine longissimus muscle. MHC 1 isoform content showed a higher correlation with number area ( r = 0.74 − 0.77) percentage type I than other isoforms. The low group, categorized by content, had lower pH 45min , paler surface drip loss high group. Moreover, positive level solubility 0.42 0.45). These results suggest that contents affect...

10.1111/j.1745-4573.2006.00060.x article EN Journal of Muscle Foods 2006-09-19
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