Kim, Nam-Soo;Shen, Yan-Nan;Kim, Tae-Yoon;Byun, Sung-June;Jeon, Ik-Soo;Kim, Sang-Hoon
BMB Reports
/
v.40
no.2
/
pp.212-217
/
2007
The chicken oviduct is a dynamic organ that produces secretory proteins such as ovalbumin during the laying period. In this study, we identified oviduct-specific proteins in hens during the egg-laying period by proteomic analysis. Proteins extracted from the magnum of hens of different ages (5, 35, and 65 weeks) were analyzed by two-dimensional gel electrophoresis to compare the intensity of proteins among samples. Approximately 300 spots were detected on each gel. Based on the comparison of image gels, we found that the intensity of eight spots in 35-week magnums was increased at least by 2-fold compared with the others. Five of the eight spots were identified as calumenin, acidic ribosomal phosphoproteins (ARP), prohibitin, heart fatty acid-binding protein, and anterior gradient-2 (AGR-2). In particular, ARP and AGR-2 were highly expressed in 35- week magnums compared with 5- and 65-week magnums. In addition, the level of these proteins was consistent with their RNA levels. Expression of AGR-2 mRNA was detected in the mature magnum, whereas no signal was observed in premature tissue. Among various tissues, expression of AGR-2 mRNA was highest in the magnum, high in the isthmus, and five fold lower in muscle. It was undetectable in the liver and in other tissues (heart and kidney). However, the mRNA levels of other proteins were ubiquitous among tissues. In transcriptional activity of AGR-2, a 3.0 kb fragment of promoter region containing potential estrogen receptor binding sites had enhanced its activity strongly. In conclusion, these results suggest that AGR-2 has functional regulatory roles in the chicken oviduct during the egglaying period.
Journal of the Korean Applied Science and Technology
/
v.27
no.1
/
pp.76-86
/
2010
This study was conducted to evaluate the effects of dietary Korean red pine bark extract as an antibiotic replacements on cholesterol, fatty acids and the shelf-life of chicken meat. To accomplish this, chickens were fed the optimal level of red pine bark extract that was found to replace antibiotics in the diet of broilers. A total of 180 male broilers(Ross strain 308) were divided into three treated groups, T1(control group), T2(8 ppm of avilamycin) and T3(65 ppm of red pine bark extract per kg diet). The lipid content was reduced by 24.67% and 20.49% in T3 group, while the cholesterol level also decreased significantly in the T3 group by 20.49% and 20.55% when compared to the T1 and T2 groups, respectively. In addition, the saturated fatty acid level was lower in the T3 group than in the T1 and T2 groups, while the unsaturated fatty acid level of the T3 group was significantly higher than those of the other groups. The TBARS value of chicken thigh muscle containing its skin on the 7th day of low temperature storage was significantly lower by 23.86% and 21.17% in the T3 group than in the T1 and T2 groups, respectively. Evaluation of the color of the meat revealed that the $L^*$value (lightness) and $b^*$value(yellowness) were higher in the T3 group than in the T1 and the T2 groups, but that the pH was significantly lower in the T3. Based on the results of this study, the addition of 65 ppm red pine bark extract to the diet of broilers should improve their meat quality with respect to the lipid contents and shelf-life when compared to the addition of antibiotics.
Kim, W.K.;Kim, M.H.;Seo, D.S.;Lee, C.Y.;Suk, Y.O.;Ko, Y.
Asian-Australasian Journal of Animal Sciences
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v.18
no.4
/
pp.532-537
/
2005
Increasing of body weight has been one of the important economic factors in the poultry industry. Insulin-like growth factor (IGF)-I is a polypeptide that serves to regulate muscle development and body growth. Moreover, IGF-I is related to feed efficiency. However, there are few studies regarding the regulatory roles of chicken IGF-I/-II compared with that of mammals. Especially, the Korean Native Ogol Chicken (KNOC) has a lean body growth and its body weight is generally lighter than the broiler chicken. Therefore, this study was conducted to investigate associations among serum IGF-I/-II concentration, feed efficiency, and body growth in KNOC. The body weight and feed intake of KNOC were recorded from 20 to 36 weeks at 2 weeks intervals, and blood was taken every 2 weeks. Serum IGF-I/-II were measured by RIA. Chickens were divided into two groups, high and low serum IGF-I concentration. Generally, feed efficiency and growth performance (body weight and weight gain) in the high serum IGF-I group were higher than those of the low group during the experimental period. In particular, the body weight of the IGF-I high group were significantly different from those of the IGF-I low group at 34 and 36 weeks, respectively (p<0.05). Moreover, body weight, weight gain, and feed efficiency had a significant correlation with serum IGF-I at several weeks (p<0.05 and p<0.01). These results show that IGF-I plays an important role in body growth and suggests a possibility that serum IGF-I could be used as a selection marker for body growth in KNOC.
Choi, Eun Ji;Chung, Young Bae;Kim, Jin Se;Chun, Ho Hyun
Journal of Food Hygiene and Safety
/
v.31
no.1
/
pp.42-50
/
2016
The effects of freezing and thawing conditions on microbiological quality and microstructure change of inoculated (Listeria monocytogenes and Campylobacter jejuni) and non-inoculated chicken breasts were investigated. Chicken breasts were frozen with air blast freezing (-20, -70, and $-150^{\circ}C$), ethanol ($-70^{\circ}C$) and liquid nitrogen ($-196^{\circ}C$) immersion freezing. There were no significant differences on the populations of L. monocytogenes inoculated with chicken breasts under different freezing conditions. However, air blast freezing ($-20^{\circ}C$) resulted in significant reductions for total aerobic bacteria and C. jejuni compared to the control and other freezing treatments. The frozen samples were thawed with (hot or cold) air blast, water immersion, and high pressure thawing at $4^{\circ}C$ and $25^{\circ}C$. the populations of total aerobic bacteria, and yeast and mold in the frozen chicken breast increased by 5.78 and 4.05 log CFU/g after water immersion thawing ($25^{\circ}C$) treatment. After five freeze-thaw cycles, the populations of total aerobic bacteria, yeast and mold, and C. jejuni were reduced by 0.29~1.40 log cycles, while there were no significant differences (P > 0.05) in the populations of L. monocytogenes depending on the freeze-thaw cycles. In addition, the histological examination of chicken breasts showed an increase in spacing between the muscle fiber and torn muscle fiber bundles as the number of freeze-thaw cycles increased. These results indicate that freezing and thawing processes could affect in the levels of microbial contamination and the histological change of chicken breasts.
A component of pine bark extract, pitamin, is known as an antioxidant and antimicrobial agent that exerts a variety of physiological effects; this compound has also been used widely in human beings. A 35-day trial was conducted to determine the influence of dietary pitamin premix via a sensory evaluation and evaluations of the TBARS, and meat quality in broiler chicken. We used 4 treatments groups: Control, Antibiotics, Pitamin premix 0.1%, and Pitamin premix 0.2%. The amino acid and protein contents in chicken breast muscle did not differ among the treatment groups. The pH of broilers fed on diets containing pitamin premix was lower (p<0.05) than broilers fed on the control and antibiotics diets, whereas the WHC was significantly higher in chicken breast muscles fed on the diet containing pitamin premix compared to the control and antibiotics groups (p<0.05). The TBARS is intended to be increased during the storage period (in days), and was significantly lower (p<0.05) in the chicken thigh muscles with skin from broilers fed on the diet containing the pitamin premix as compared to the control and antibiotics group (p<0.05). The sensory evaluation of boiled chicken, with the exception of the antibiotics group, revealed significantly better results from chickens fed on diets containing pitamin premix than the control group (p<0.05). These results suggest that dietary pitamin premix may improve the shelf life, flavor, taste, and meat quality in broiler chicken.
Journal of the Korean Society of Food Science and Nutrition
/
v.37
no.5
/
pp.618-624
/
2008
A 35-day trial was carried out to determine the influence of dietary cinnamon powder (CNP) on the sensory evaluation and quality of chicken meat, carcass characteristics, plasma lipid level and growth performance of broiler chickens. There were 5 treatment groups: control; CNP 2.0%; CNP 3.0%; CNP 4.0%; and CNP 5.0%. The body weight of the broilers fed the diets containing 3.0% CNP was higher than the broilers fed the control feeds (p<0.05). The concentration of triacylglyceride, HDL-C was higher in the plasma from broiler chickens fed diets with CNP (p<0.05) but the concentrations of total cholesterol and LDL-C were significantly lower (p<0.05) compared to the control group. The carcass percentage, chicken breast and thigh weight were not different between the CNP and control groups. The WHC was significantly higher in the chickens fed 4% CNP diet, while the TBARS was significantly lower (p<0.05) in the chickens fed 3% CNP diet compared to the control group. The color of the breast muscle from the chickens fed 3% CNP diet was lighter than those from the control groups (p<0.05). The sensory evaluation of the taste and savor related to CNP in fried or boiled chicken meat were significantly better from the broiler chicken fed diets containing CNP than the control group (p<0.05). These results suggest that dietary cinnamon powder may improve savor and quality of chicken meat in broiler chickens.
Objectives : The purpose of this study is to establish literatural evidence about thermotherapy and cryotherapy for Korean medicine through literatural review. Methods : Applicable paragraphs which were related to the thermotherapy and cryotherapy of cutaneous and muscle meridian were phrased from in "Yibujicheng(醫部集成) and "Dongyibaojian(東醫寶鑑)" where were archiving of Oriental or Korean medicine literatures. Searched paragraphs were analysed for establishing historical and theoretical bases of thermotherapy and cryotherapy in Korean medicine. Results : Thermotherapy of cutaneous and muscle meridian(經皮經筋溫熱療法) such as hot pack, warm water therapy, paraffin bath, ultrasound is originated from yu(慰) warm water(溫水) hot water(熱水). Matching indications are various pain conditions(caused by coldness(寒), hard-work(僗若), extravasated blood(瘀血), inflammatory skin disease, frostbite and several internal diseases. It also treats gynecological diseases and facial palsy. Diathermic therapy on acupuncture points(穴位照射溫熱療法) such as infra-red, microwave, shortwave is originated from huolu(火爐), wenlu(溫爐), xianglu(香爐), lamp light(燈火). Its objective is to improve the effects of herb medicine by aiding sweating or to treat the residual symptoms of fever disease or to care skin disease and pain from bone fracture, contusion. Cryotherapy of cutaneous and muscle meridian(經皮經筋溫寒冷療法) such as ice pack, ice spray, iced whirpool, cool water bath is originated from lengfu(冷敷), lengtie(冷貼), lengshiyu(冷石熨). Matching indications are contusions, animal bite injury, corn(肉刺) and (淋病), eye disease, nasal bleeding, hemorrhoid, inflammatory skin disease and chicken pox. Conclusions : Thermotherapy and cryotherapy of cutaneous and muscle meridian(經皮經筋溫冷療法) are the treatments which were used in Korean medicine from the ancient Korean medicine. As scientific equipments were originated from yu(慰), huolu(火爐), wenlu(溫爐), xianglu(香爐), lamp light(燈火). lengfu(冷敷), lengtie(冷貼), lengshiyu(冷石熨). It can be said that these are elements of Korean medicine. More rigorous studies are needed to establish clinical evidence about not only thermotherapy and cryotherapy but also the other physiotherapy of Korean medicine.
Fluoroquinolones in muscle and egg were separated by liquid extraction and determined. The analysis was carried out using following conditions; C18 column ($150{\times}4.6mm$, $5{\mu}m$), mobile phase composed of D.W. (containing 0.4% triethylamine and phosphoric acid) : methanol : acetonitrile (780:100:120, v/v/v), quarternary pump at a flow rate of 0.9ml/min and $20{\mu}l$ of injection volume, fluorescence detector with EX 278nm/Em 456nm. The calibration range of seven fluoroquinolones showed linearity ($r^2{\geq}0.999$) at concentration range of $0.025{\sim}0.8{\mu}g/ml$. The recoveries in fortified muscle and egg represented more than 81.3%. The detection limits for ofloxacin, norfloxacin, ciprofloxacin, enrofloxacin, danofloxacin, saraloxacin and orbifloxacin were 3.1, 2.5, 3.6, 1.7, 0.9, 2.5 and $2.1{\mu}g/kg$, respectively. We also monitored fluoroquinolones residue in the sample (chicken muscle 182, cattle muscle 140, pig muscle 139, egg 212) using EEC-plate (E. coli ATCC 11303) screening and HPLC confirmation methods. The screening test results, fluoroquinolones, antibacterial substances were all negative.
Kim, Hyun-Wook;Lee, Eui-Soo;Choi, Yun-Sang;Choi, Ji-Hun;Han, Doo-Jeong;Kim, Hack-Youn;Song, Dong-Heon;Choi, Seul-Gi;Kim, Cheon-Jei
Food Science of Animal Resources
/
v.31
no.6
/
pp.799-806
/
2011
This study was conducted to evaluate the effect of the aging period prior to freezing on the meat quality of Hanwoo longissimus dorsi (LD) muscle. Three different combinations of aging and freezing periods (0/90, 20/70, and 40/50) were examined using LD muscle at 24 h postmortem under an identical storage time of 90 d. The pH and lightness slightly increased with increasing aging period. However, there were no significant (p>0.05) differences in redness and yellowness. The solitary freezing treatment (0/90) had the significantly (p<0.05) lowest moisture content. The un-aged treatment had a significantly (p<0.05) higher total loss than the aged treatments due to an increase in thaw drip loss. The aging significantly improved the myofibrillar fragmentation index and shear force of Hanwoo LD muscle (p<0.05). In addition, the aged treatments produced a higher flavor, tenderness, juiciness, and overall acceptability relative to un-aged treatment. However, there was no significant (p>0.05) difference in shear force and sensorial properties between 20 and 40 d aging prior to freezing. Therefore, 20 d aging prior to freezing may be a sufficiently effective strategy to improve the tenderness and sensorial properties of Hanwoo LD muscle.
Objective: This study investigated the effect of different acute heat stress (HS) levels on chicken meat quality and ultra-structure. Methods: Chickens were randomly divided into 7 groups to receive different HS treatments: i) $36^{\circ}C$ for 1 h, ii) $36^{\circ}C$ for 2 h, iii) $38^{\circ}C$ for 1 h, iv) $38^{\circ}C$ for 2 h, v) $40^{\circ}C$ for 1 h, vi) $40^{\circ}C$ for 2 h, and vii) un-stressed control group ($25^{\circ}C$). Blood cortisol level, breasts initial temperature, color, pH, water holding capacity (WHC), protein solubility and ultra-structure were analyzed. Results: HS temperatures had significant effects on breast meat temperature, lightness ($L^*$), redness ($a^*$), cooking loss and protein solubility (p<0.05). The HS at $36^{\circ}C$ increased $L^*{_{24h}}$ value (p<0.01) and increased the cooking loss (p<0.05), but decreased $a^*{_{24h}}$ value (p<0.05). However, as the temperature increased to $38^{\circ}C$ and $40^{\circ}C$, all the values of $L^*{_{24h}}$, cooking loss and protein denaturation level decreased, and the differences disappeared compared to control group (p>0.05). Only the ultimate $pH_{24h}$ at $40^{\circ}C$ decreased compared to the control group (p<0.01). The pH in $36^{\circ}C$ group declined greater than other heat-stressed group in the first hour postmortem, which contributed breast muscle protein degeneration combining with high body temperature, and these variations reflected on poor meat quality parameters. The muscle fiber integrity level in group $40^{\circ}C$ was much better than those in $36^{\circ}C$ with the denatured position mainly focused on the interval of muscle fibers which probably contributes WHC and light reflection. Conclusion: HS at higher temperature (above $38^{\circ}C$) before slaughter did not always lead to more pale and lower WHC breast meat. Breast meat quality parameters had a regression trend as HS temperature raised from $36^{\circ}C$. The interval of muscle fibers at 24 h postmortem and greater pH decline rate with high body temperature in early postmortem period could be a reasonable explanation for the variation of meat quality parameters.
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