• 대한핵의학회지
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• 제7권1호
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• pp.1-13
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• 1973

• The Korean Journal of Physiology
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• 제25권1호
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• pp.27-35
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• 1991

Generally, it has been known that cholecystokinin (CCK) release into the plasma is under cholinergic control, but secretin release is not. Thus in anesthetized dogs we studied the effect of atropine $(50\;{\mu}g/kg\;followed\;by\;50\;{\mu}g/kg/hr)$ on pancreatic secretion and plasma concentrations of bioactive CCK and immunoreactive secretin in response to intraduodenal perfusion of sodium oleate (1, 3 and 9 mmol/hr). The volume, protein output and bicarbonate output of the secretion were increased by sodium cleats and this oleate-induced secretion was decreased significantly by atropine administration. However the increased plasma CCK and secretin levels by sodium oleate were not changed by atropine. These results indicate that atropine suppressed sodium oleate-induced pancreatic secretion through inhibiting cholinergic mechanism directly rather than decreasing the release of pancreatic secretory hormones. In another set of experiments, bilateral cervical vagi were stimulated electrically to observe the changes of pancreatic secretion and the above two plasma hormone levels in the presence or absence of atropine. In the vagally stimulated dogs, the volume, protein output and bicarbonate output of the pancreatic secretion were increased significantly. Both plasma secretin and CCK were concomitantly released significantly by vagal stimulation. Atropine significantly depressed the pancreatic secretory response as well as the release of these two pancreatic secretory hormones. Therefore, we conclude that in the presence of atropine the depressed pancreatic response to vagal stimulation is at least, in part, due to decreased release of endogenous CCK and secretin. In the vagally stimulated animals, however, the involvement of direct cholinergic influence on pancreatic exocrine gland remains to be answered.

• 한방안이비인후피부과학회지
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• 제12권2호
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• pp.53-66
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• 1999

This study has been carried out to investigate the effects of Dojuksan on the renal functions and internal secretion system, as water balance, urine volume, urinary excretion of sodium and potassium, free water clearance, urinary excretion of creatinine, plasma levels of artrial natriuretic peptide (ANP), plasma levels of aldosterone and plasma renin activity, comparing experimental group which Dojuksan water extract were administrated with control group. Sprague-Dawley rats, about 200-250 g, were used for this experiment. The results of this study were as follows: 1. Water balance decreased significantly after the administration of Dojuksan water extract. 2. Urine volume increased significantly after the administration of $100{\mu}l$ Dojuksan water extract per 100g rat. 3. Urinary excretion of sodium increased significantly but urinary excretion of potassium did not change after the administration of Dojuksan water extract. 4. Free water clearance decreased significantly after the administration of Dojuksan water extract 5. Urinary excretion of creatinine increased significantly after the administration of Dojuksan water extract 6. Plasma renin activity did not change after the administration of Dojuksan water extract 7. Plasma levels of artrial natriuretic peptide (ANP) did not change after the administration of Dojuksan water extract 8. Plasma levels of aldosterone decreased significantly after the administration of 200 ${\mu}Dojuksan water extract per l00g rat The results suggest that Dojuksan increase the urinary excretion of sodium. and thus reduce the water balance, which resulted from suppression of sodium reabsorption into renal tubule by increasing glomerular filtration rate and decreasing aldosterone.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.889-892
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• 2009

A microwave plasma torch at the atmospheric pressure by making use of magnetrons operated at the 2.45 GHz and used in a home microwave oven has been developed. This electrodeless torch can be used to various areas, including industrial, environmental and military applications. Although the microwave plasma torch has many applications, we in the present work focused on the microwave plasma torch operated in pure steam and several applications, which may be used in future and right now. For example, a high-temperature steam microwave plasma torch may have a potential application of the hydrocarbon fuel reforming at one atmospheric pressure. Moreover, the radicals including hydrogen, oxygen and hydroxide molecules are abundantly available in the steam torch, dramatically enhancing the reaction speed. Also, the microwave plasma torch can be used as a high-temperature, large-volume plasma burner by injecting hydrocarbon fuels in gas, liquid, and solid into the plasma flame. Lastly, we briefly report an underway research, which is remediation of soils contaminated with oils, volatile organic compounds, heavy metals, etc.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 C
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• pp.1830-1833
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• 2002

We measured 3-dimensional temporal behavior of the light emitted from AC plasma display panel(PDP) at various auxiliary voltage pulse width supplied to the address electrode in sustain period using scanned point detecting system. In the case of applying an auxiliary address voltage pulse, the light emission starts at the inner edges of the cathode so the larger discharge volume toward address electrode can be obtained compared with the normal sustain discharge. Especially, when the auxiliary voltage pulse width is the $2{\mu}s$, the maximum luminance and long emission time can be obtained.

• 대한한방내과학회지
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• 제10권1호
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• pp.125-136
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• 1989

This study was investigated to clarify the effect of Sin Bee Tang (神秘湯) on the renal function, arterial blood pressure and plasma cortisol. The results obtained were follows; 1. Urine volume and glomerular filtration rate were decreased significantly after Sin Bee Tang water extract, 0.1ml/kg, administration. 2. Glomerular filtration rate, renal plasma flow and urinary excretion of electrolytes were increased significantly after Sin Bee Tang water extract, 0.25ml/kg, administration. 3. Plasma cortisol concentration increased significantly after Sin Bee Tang water extract, 0.25ml/kg, administration. These results suggest that the therapeutic action of Sin Bee Tang for 'Su Chun (水喘)' has a relation with the increase of plasma cortisol and renal hemodynamic effect.

• Carbon letters
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• 제5권3호
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• pp.103-107
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• 2004

The atmospheric pressure plasma treatments ($Ar/O_2$ and $Ar/N_2$) of activated carbon fibers (ACFs) were carried out to introduce hydrophilic functional groups on carbon surfaces in order to enhance the hydrogen chloride gas (HCl) adsorption. Surface properties of the ACFs were determined by XPS and SEM. $N_2$/77 K adsorption isotherms were investigated by BET and D-R (Dubinin-Radushkevich) plot methods. The HCl removal efficiency was confirmed by HCl detecting tubes (range:1~40 or 40~1000 ppm). As experimental results, it was found that all plasma-treated ACFs showed the decrease in the pore volume, but the HCl removal efficiency showed higher level than that of the untreated ACFs. This result indicated that the plasma treatments led to the conformation of hydrophilic functional groups on the carbon surfaces, resulting in the increase of the interaction between the ACFs and HCl gas.

• Nuclear Engineering and Technology
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• 제54권3호
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• pp.1145-1151
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• 2022

A hybrid cutting using both plasma and end mill was developed for safe and efficient dismantling of nuclear facilities. In this cutting method, a moving arc plasma heats up the workpiece before milling. Thermally softened part of the workpiece is then removed quickly and deeply with an end mill. For the cutting experiments, a three-axis numerical control (NC) milling machine was combined with a commercialized arc plasma torch and used to cut 25 mm thick stainless steel plates. Experimental results revealed that pre-heating by arc plasmas can improve the cutting volume per unit time higher than 40% by reducing the cutting load and increasing the cuttable depth when using an end mill without cutting fluids. These advantages of a hybrid cutting process are expected to contribute to quick and safe segmentations of metal structures with radioactively contaminated inner surfaces.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2010년도 제39회 하계학술대회 초록집
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• pp.74-74
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• 2010

The aqua-plasma is the non-thermal plasma in electrical conductive electrolyte by generates the vapor film layer on the immersed metal electrode surface. This plasma can generate the hydroxyl radical by dissociate the water molecule with the plasma electron. To develop the plasma discharge device for high efficiency in the hydroxyl radical generation, proper model for estimation of plasma power is necessary. In this work, the 1-D spherical model was developed, considering temperature dependence material constants. The relation between the plasma power and hydroxyl generation was also studied by the comparison between the optical emission intensity from the hydroxyl radical using monochromator and estimated plasma power. First, the thickness of vapor layer thickness was estimated using the Navier-Stokes fluid equation in order to calculate the discharge E-field inside vapor layer. Using the E-field magnitude and power balance on the plasma generation, it was possible to estimate the plasma power. The plasma power was assumed to uniformly fill the vapor layer and the temperature of vapor layer was fixed in the boiling temperature of electrolyte, 375K. In the experiment, the aqua-plasma was discharged in the saline by applied the voltage on the bipolar electrode. The range of applied voltage was 234 to 280V-rms in the frequency of 380 kHz. Two type electrodes were produced with two ${\Phi}0.2$ tungsten. The plasma power was estimated from the V-I signal from the two high voltage probes and current probe. The estimated plasma power agreed with the profile of emission intensity when the plasma discharged between the metal electrode and vapor layer surface. However, when the plasma discharged between the metal electrodes, the increasing rate of emission intensity was lower than the increase of plasma power. It implies that the surface reaction is more sufficient rather than the volume reaction in the radical generation, due to the high density of water molecule in the liquid.

• 대한핵의학회지
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• 제4권2호
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• pp.11-27
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• 1970

간경변증(肝硬變症) 환자(患者) 29 례(例)에서 혈장량(血漿量), 심박출량(心搏出量) 및 신혈장류량(腎血漿流量)을 동시(同時)에 측정(測定)하여 혈역학적(血力學的) 변화(變化)를 관찰(觀察)하였으며 다음과 같은 결론(結論)을 얻었다. 1. 평균(平均) 혈장량(血漿量)은 $3793{\pm}895ml$로 정상(正常)보다 증가(增加)된 것을 보았고 혈액량(血液量)($5266{\pm}1222ml$) 및 체중(體重) kg당(當) 혈액량(血液量)($95.7{\pm}23.41ml$)도 역시(亦是) 증가(增加)되어 있었다. 체중(體重) kg당(當) 혈장량(血漿量)($69.1{\pm}19.1ml$)은 증가(增加)하는 경향(傾向)을 보였고 혈액량(血液量)과 혈장량(血漿量)의 차(差), 즉(卽) 적혈구질량(赤血球質量)은 $26.4{\pm}7.05ml$로 정상범위내(正常範圍內)에 있었다. 2. 평균(平均) 심박출량(心搏出量)은 $7708{\pm}2652ml/min$로 증가(增加)되어 있었으며 심계수(心係數)($4924{\pm}1998ml/min/M^2$) 심박동량(心搏動量) ($96.2{\pm}34.2ml/beat$), 심박동계수(心搏動係數)($62.3{\pm}27.34ml/M^2$) 및 분별심계수(分別心係數)($1.54{\pm}0.577$)도 모두 증가(增加)함을 보았다. 전말초저항(全末梢抵抗)은 $1664{\pm}753.8dynes\;sec\;cm^{-5}M^2$로 정상(正常)보다 감소(減少)되어 있었다. 3. 평균(平均) 신혈장류량(腎血漿流量)은 $537{\pm}146.8ml/min/1.73M^2$로 정상(正常) 내지는 감소(減少)된 것을 보였고, 평균(平均) treatinine clearance는 $66.7{\pm}23.0ml/min/1.73M^2$로 현저(顯著)한 저하(低下)를 보았다. filtration fraction은 일정(一定)치 않았으나 대부분(大部分)의 예(例)에서 감소(減少)되었다. 심박출량(心搏出量)의 신분별치(腎分別値)는 상대적(相對的)으로 감소(減少)하여 있었다. 4. 신혈장류량(腎血漿流量)은 전반적(全般的)으로는 정상(正常) 또는 저하(低下)되어 있었으나 creatinine clearance가 $60ml/min/1.73M^2$ 이하(以下)인 군(群)과 치료(治療)에 저항(抵抗)하는 복수군(腹水群) 및 질소혈증(窒素血症)이 있는 예(例)에서 현저(顯著)한 감소(減少)를 보였다. 5. 본실험(本實驗)에서 관찰(觀察)한 사구체(絲球體) 여과율(濾過率)의 감소(減少), filtration fraction의 저하(低下) 및 심박출량(心搏出量)의 신분별치(腎分別値)의 감소등(減少等)은 신장(腎臟)의 수입세동맥저항(輸入細動脈抵抗)의 상승(上昇)을 뒷받침한다. 6. 간경변증(肝硬變症)에서 신순환(腎循環) 장애(障碍)는 질소혈증(窒素血症)이나 핍뇨(乏尿)에 선행(先行)하여 일어남을 알 수 있었다. 7. 임상상(臨床像)이나 간기능(肝機能) 성적(成績)은 이들 혈역학(血力學) 변화(變化)와 상관관계(相關關係)가 없었고 다만 식도(食道) 정맥류(靜脈瘤)가 심박출량(心搏出量)이 증가(增加)된 예(例)에서 관찰(觀察)되었다. 8. 신혈역학(腎血力學) 변화(變化)와 혈장량(血漿量) 혹(或)은 심박출량(心搏出量) 간(間)에도 상관관계(相關關係)는 없었다.