• Title/Summary/Keyword: 토크 변화율

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Stress Responses of Olive Flounder Paralichthys olivaceus to Hyposalinity (사육수의 저염분 변화에 따른 넙치(Paralichthys olivaceus)의 스트레스 반응)

  • 이복규;박철환;김병기;허준욱;장영진;이종관;임영수;이종하
    • Journal of Aquaculture
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    • v.15 no.1
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    • pp.69-75
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    • 2002
  • Two different sizes of olive founder were abruptly (within 30 min) exposed to hyposalinities from 35 to 0 $\textperthousand$ and to 15 $\textperthousand$ in a flow through seawater culture systems with 8 tanks (300 l/tank). Analysis of blood samples showed the following significant increase at 0 $\textperthousand$ S: hematocrit from 16.1 to 23.4% after 3 hr exposure and to 24.6% after 24 hours; plasma cortisol from 1.6 to 22.8 and 9.5 ng/$ml$ at 1 and 24 hi after exposure. At this salinity, survival decreased to 92 and 20 % after 72 and 144 hours of exposure, respectively. Levels of glucose, $Na^{+}and Cl$^{-}$, total protein and AST showed that the fish was under considerable stress. However, the fish showed no significant stress on exposure to 15 $\textperthousand$S.

Effects of Feeding Bupleurum falcatum L. on Performance, Blood Component and Hormone Concentration in Broiler Breeder Hens (육용종계 사료에 시호(Bupleurum falcatum L.)의 첨가가 생산능력, 혈액의 성상 및 호르몬 분비에 미치는 영향)

  • Park J.H.;Kang C.W.;Ryu K.S.
    • Korean Journal of Poultry Science
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    • v.33 no.1
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    • pp.49-55
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    • 2006
  • An experiment was conducted to investigate the effects of feeding Bupleurum falcatum L.(BFL) on performance, blood component and hormonal secretion in broiler breeder hens. A total of 800 broiler breeder hens were allotted to four treatments(BFL ; 0, 0.5, 1.0, 2.0%) with four replications for eight weeks. Weight gain was not significantly different between the groups in growing period($20{\sim}24$ weeks), but egg production and egg mass of broiler breeder hens fed BFL were significantly(p<0.05) higher than those of the control groups in laying period($24{\sim}28$ weeks). Dietary BFL did not affect serum triglyceride concentration, whereas serum cholesterol concentration was significantly increased(p<0.05) in 2.0% BFL-fed groups. No statistical differences were found in serum glucose, Ca, P, Mg, total protein, albumin, GGT, AST, ALT and BUN concentrations. However, albumin/globulin ratio was statistically higher in BFL-fed groups compared to the control groups(p<0.05). Serum estrogen concentrations were significantly increased by feeding a diet containing 0.5% BFL, but progesterone were not influenced. Serum IGF-I of BFL groups was greater than that of control groups at 28 weeks(p<0.05). In conclusion, the results suggest that the dietary addition of BFL into broiler breeder diets improved egg production, serum estrogen and IGF-I concentration, and decreased serum cholesterol concentration and albumin/globulin ratio.

Biomechanical and Physiological Comparative Analysis of the Single-Radius Knee Arthroplasty Systems and Multi-Radius Knee Arthroplasty Systems (무릎인공관절 단축범위(Single-Radius) 수술자와 다축범위(Multi-Radius) 수술자의 운동역 학적 및 운동생리학적 비교분석)

  • Jin, Young-Wan;Kwak, Yi-Sub
    • Journal of Life Science
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    • v.18 no.11
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    • pp.1532-1537
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    • 2008
  • The purpose of this study was to investigate the effect of different arthroplasty designs on knee kinematic and lower limb muscular activation for up-stair and down-stair movement. 3-D video analysis of whole body and joint kinematics and EMG analysis of quadriceps and hamstrings were conducted. One-way ANOVAs were used for statistical analyses (p=0.05). The single-radius group exhibited more arthroplasty limb quadriceps EMG and hamstring coactivation EMG than the multi-radius group. Single-radius demonstrated more abduction angular displacement and reached peak abduction earlier than the multi-radius arthroplasty limb. The single- radius the percent body fat showed similar values in the Elderly, Single and Multi-radius group among the periods, however Control group was Lowered among the periods. Single-radius group limb also increased the quadriceps muscle activation level to produce more knee extension moment to compensate for the short quadriceps moment arm. Resting metabolic rate was significantly increased in control group in the period of LI. Energy expenditure was extremely increased in all groups except control group among the periods. We can say this is the exercise effects.