• 한국동물학회:뉴스레터
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• 제12권2호
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• pp.124.2-124
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• 1995

No Abstract, See Full Text

• 한국동물학회:학술대회논문집
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• 한국동물학회 1995년도 한국생물과학협회 학술발표대회
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• pp.260.2-260
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• 1995

No Abstract, See Full Text

• 한국식품영양과학회지
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• 제14권1호
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• pp.82-87
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• 1985

닭의 가슴부위 및 다리부위의 골격근(骨格筋)에서 myofibril, actomyosin 및 myosin을 추출하고 ATPase activity(${\mu}mole$ pi/mg protein/min)로서 나타낸 몇가지 생물학적(生物學的) 활성(活性)을 비교하였다. 가슴부위에서 추출한 actomyosin, myofibril 그리고 myosin의 $Mg^{+2}$-ATPase 활성(活性)은 0.05M KCl에서 0.80, 0.42, 0.40으로서 다리부위에서 추출한 단백질(蛋白質)의 활성(活性)인 0.69, 0.33, 0.28 보다 높았다. 가슴부위와 다리부위의 myosin의 ATPase 활성(活性)은 EDTA 농도보다 $Mg^{+2}$농도가 높아지면서 ATPase 활성(活性)을 1/10정도 저해(沮害)시켰고, $Ca^{+2}$ 농도는 $10^{-3}M$에서 400%까지 활성(活性)을 증가시켰다. 가슴부위와 다리부위에서 추출한 actomyosin의 용해되는 시점(始點)은 각각 0.1M KCl 및 0.15 M KCl이었고 myosin인 경우는 각각 0.25 M KCi 및 0.30 M KCl이었다.

• 한국식품영양과학회지
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• 제21권4호
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• pp.348-352
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• 1992

오리를 고온침탕법과 중온침탕법에 의해 털을 제거하고 다리 및 가슴부위의 골격근에서 actomyosin을 추출하여 몇가지 특성을 비교하엿다. 고온침탕 처리한 근육으로부터 추출된 actomyosin의 추출성은 다리와 가슴근육이 각각 7.84, 39.48mg/g, 중온침탕한 것은 각각 4.79, 28.04mg/g고온침탕법의 추출성이 더 높았다. Actomyosin의 $Ca^{2+}-ATPase$ 활성은 고온침탕법이 다리근육의 경우에서는 중온침탕법보다 낮았으나 가슴근육은 이온강도 0.08 이하에서 중온침탕법이 높았고 그 이상에서는 고온침탕법이 높았다. Actomyosin의 $Mg^{2+}-ATPase$ 활성은 저이온강도에서 활성이 컸으며 가슴근육이 다리근육의 경우보다 침탕법에 의한 활성의 차이가 크게 나타났다. 용해도는 침탕방법과 부위에 관계없이 용해시점과 완료시점이 비슷하였다. 그리고 고온침탕 처리한 근육과 다리보다 가슴근육이 thin filament에 있는 단백질이 많이 추출되어 나오는 현상을 보였다.

• The Korean Journal of Physiology and Pharmacology
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• 제22권2호
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• pp.215-223
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• 2018

Intracellular $Ca^{2+}$ mobilization is closely linked with the initiation of salivary secretion in parotid acinar cells. Reactive oxygen species (ROS) are known to be related to a variety of oxidative stress-induced cellular disorders and believed to be involved in salivary impairments. In this study, we investigated the underlying mechanism of hydrogen peroxide ($H_2O_2$) on cytosolic $Ca^{2+}$ accumulation in mouse parotid acinar cells. Intracellular $Ca^{2+}$ levels were slowly elevated when $1mM\;H_2O_2$ was perfused in the presence of normal extracellular $Ca^{2+}$. In a $Ca^{2+}-free$ medium, $1mM\;H_2O_2$ still enhanced the intracellular $Ca^{2+}$ level. $Ca^{2+}$ entry tested using manganese quenching technique was not affected by perfusion of $1mM\;H_2O_2$. On the other hand, $10mM\;H_2O_2$ induced more rapid $Ca^{2+}$ accumulation and facilitated $Ca^{2+}$ entry from extracellular fluid. $Ca^{2+}$ refill into intracellular $Ca^{2+}$ store and inositol 1,4,5-trisphosphate ($1{\mu}M$)-induced $Ca^{2+}$ release from $Ca^{2+}$ store was not affected by $1mM\;H_2O_2$ in permeabilized cells. $Ca^{2+}$ efflux through plasma membrane $Ca^{2+}-ATPase$ (PMCA) was markedly blocked by $1mM\;H_2O_2$ in thapsigargin-treated intact acinar cells. Antioxidants, either catalase or dithiothreitol, completely protected $H_2O_2-induced$ $Ca^{2+}$ accumulation through PMCA inactivation. From the above results, we suggest that excessive production of $H_2O_2$ under pathological conditions may lead to cytosolic $Ca^{2+}$ accumulation and that the primary mechanism of $H_2O_2-induced$ $Ca^{2+}$ accumulation is likely to inhibit $Ca^{2+}$ efflux through PMCA rather than mobilize $Ca^{2+}$ ions from extracellular medium or intracellular stores in mouse parotid acinar cells.

• 한국균학회지
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• 제19권3호
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• pp.220-225
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• 1991

1. 표고버섯 중 정제된 ATPase는 $Fe^{3+},\;Fe^{2+},\;Cd^{2+},\;Mg^{2+},\;K^{+}$ 및 $Co^{2+}$ 이온에 의하여 활성화 되었으나 $Zn^{2+},\;Ca^{2+},\;Cu^{2+}$ 및 $Ni^{2+}$ 이온에 의하여는 그 활성도가 억제되었다. 2. 5 mM $Fe^{3+}$, 10 mM $Fe^{2+}$, 1 mM $Cd^{2+}$, 5 mM $Mg^{2+}$, 5 mM $K^{+}$ 및 5 mM $Co^{2+}$이온은 이효소의 활성을 각각 130, 65, 65, 68, 105 및 23% 증가시켰다. 3.10 mM $Zn^{2+}$, 10 mM $Ca^{2+}$, 0.5 mM $Cu^{2+}$ 그리고 10 mM $Ni^{2+}$ 이온은 이효소의 활성을 각각 18, 19, 27% 그리고 30%의 억제효과를 보였다. 4. 10 mM ${Co_3}^{2-}$, 20 mM $CN^{-}$, 20 mM ${CH_3COO}^{-}$ 그리고 20 mM ${NO_3}^{-}$의 음이온은 이효소의 활성을각각 98, 95, 70% 그리고 50%를 억제시켰으나,${SO_4}^{2-}$ 이온은 농도증가에 따라 활성화 되었고, 20 mM 용액에서 21%로 활성도 증가의 최대치를 보였다.

• 한국발생생물학회지:발생과생식
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• 제1권1호
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• pp.45-56
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• 1997

Befor fertilization, mammalian oocytes undergo meiotic maturation, which consists of nuclear and cytoplasmic differentiation. In this study, changes of $Ca^{2+}$ stores in mouse oocytes were examined during meiotic maturation and the role of $Ca^{2+}$ in the regulation of the maturation was investigated by using monoclonal antibodies against smooth endoplasmic reticulum $Ca^{2+}$-ATPase(SERCA-ATPase) and calreticulin. Observations were made under epifluorescence microscope and/or confocal laser scanning microscope. In immature oocytes which did not resume meiotic maturation, SERCA-ATPases were mostly localized in the vicinity of the germinal vesicle and calreticulins were distributed evenly throughout the cytoplasm. In mature oocytes, SERCA-ATPases were observed throughout the cytoplasm, butwere absent from the nuclear region. In contrast, calreticulins were localized mostl in the cortex of the oocyte and were absent from the cytoplasm. However, bright fluoresence stainings were wbserved in the perimeiotic spindle region of mature oocyte when labeled with antibodies against calreticulin. These results indicate that mouse oocytes undergo distinct rearrangement of the localization of $Ca^{2+}$-ATPases and calreticulins during meiotic maturation. Thus it can be suggested that redistribution of the $Ca^{2+}$ stores, as revealed by differential fluorescence stainings, is deeply involved in the regulatory mechanism of mammalian oocyte maturation.

• 대한약리학회지
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• 제12권1호
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• pp.23-29
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• 1976

최근(最近) 현저한 심근수축증강작용(心筋收縮增强作用)이 알려져 있는 부자(附子) ${\ulcorner}$부타놀${\lrcorner}$ 분획의 작용기전(作用機轉)을 구명(究明)코저 하는 시도(試圖)의 일환으로 심근수축단백(心筋收縮蛋白)에 대한 직접적인 영향을 관찰하였다. 부자${\ulcorner}$부타놀${\lrcorner}$ 분획은 actomyosin ATPase 활성(活性)에 대하며 별(別) 영향을 미치지 않았으며 actin-myosin 상호결합(相互結合)에서 $Ca^{++}$과 유사한 역활을 나타내지도 못했다. 단 actomyosin의 superprecipitation에 대하여는 약간 촉진적(促進的)이었으나 이러한 작용은 actomyosin ATPase 활성(活性)의 증가를 동반치 못했다. 그러나 microsmal $Na^+-K^+$-activated ATPase 활성(活性)은 현저히 억제하였으며 이러한 현상은 부자(附子)${\ulcorner}$부타놀${\lrcorner}$ 분획이 $Ca^{++}$의 membrane transport에 영향을 미칠것으로 인정되는 사실로서 부자(附子)${\ulcorner}$부타놀${\lrcorner}$ 분획의 심근수축증강작용기전(心筋收縮增强作用機轉)의 일부는 근수축단백(筋收縮蛋白)에 대한 직접작용보다는 extracellular 또는 intracellular membrane에서의 $Ca^{++}$ 이동에 영향을 미쳐 세포내 유리 $Ca^{++}$농도를 증가시키는것이 간접적으로 심근수축(心筋收縮)을 촉진(促進)시킬 것으로 사료되었다.

• 한국식품영양과학회지
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• 제28권2호
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• pp.292-298
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• 1999

Myofibril and actomyosin were prepared from red muscle and white muscle of fresh water fish and sea water fish, and their biochemical characteristics and SDS PAGE patterns of myofibril were compared. SDS PAGE analysis showed that electrophoretic patterns of myofibril were similar be tween white muscle and red muscle, while difference of 30kDa component of myofibril was detected between fresh water fish and sea water fish. When myofibril were treated with trypsin, difference in hydrolysis of heavy chain was observed between white muscle and red muscle. In activities of Ca ATPase, Mg ATPase, EDTA ATPase and ATPase activity pH curve, myofibrillar protein from fresh water fish showed higher specific activity than those from sea water fish.

• 대한한방내과학회지
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• 제15권1호
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• pp.80-98
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• 1994

According to the original documents, Sagungsan is considered as an effective drug for controlling the hypertensive epistaxis induced by tension of autonomic nerve and it's hyperfunction. The present experiment was designed to understand the effect of Sagungsan extract on the hemostatic action, intracranial pressure, blood pressure and cardiovascular system in experimental animals. And thus the bleeding time, prothrombin time, capillary dilation, blood pressure, Intracranial pressure, and enzymatic analysis of the ATPase activities were studied. The result obtained here were as followings: 1. Sagungsan water extract reduced the bleeding time in mouse, and prolonged the prothrombin time in rabbits. 2. The drug extract increased the tail volume by capillary dilation in rats. 3. The drug extract inhibited the increase of intracranial pressure and arterial blood pressure in rabbits. 4. At the early time, the increase of arterial blood pressure by the drug extract significantly inhibited by pretreated atropin and regitine in rabbits. 5. The drug extract relaxed the smooth muscle by stimulating the Mg2+-Ca2+-ATPase activities of gastric sarcoplasmic reticulum isolated from rabbit stomach. 6. The drug extract stimulated the heart contraction by inhibiting the $Mg^{2+}-Ca^{2+}-ATPase$ activities of cardiac sarcoplasmic reticulum isolated from rabbit heart. The inhibitory mechanism was reversible and noncompatitive. 7. The drug extract increased the hepatic blood volume by stimulating the hepatic total ATPase activities and hepatic metabolism. 8. The drug extract acted as a tranquilizer by inhibiting the neural Na+-K+-ATPase activity. According to the results, Sagungsan water extract dilated the capillaries, stimulated the heart beat, and thus increased the blood flow with decreasing the intracranial pressure and blood pressure. These effects stanches the epistaxis collectively.