• 약학회지
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• 제13권1호
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• pp.16-21
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• 1969

When ultrasonic wave with barium titanate as an ultrasonic transducer (96.84kc, 1.4kv, 240mA) was applied to a dilute glucose solution, glucose was oxidized to glucuronic acid. It was found that the lower the glucose concentration, the higher the oxidation rate. The aeration and the presence of ferrous sulfate as a catalyst were found to increase the rate. The optimal duration for applying the wave to the solution was found to be six hours.

• 대한약리학회지
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• 제9권1호
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• pp.65-73
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• 1973

Zea mays Linne belonging to Graminae family has been ordinarily made use of foods and fodder. Maydis Stigma, the stigma of maize, has been discarded without any special application with the exception of being applied as diuretic in the sphere of Chinese medicine, moreover, the pharmacological research toward Maydis Stigma as a medical herb has not been regretfully undertaken at all. The authors hereby paid attention to this point of view and made experiment to find out whether the water extract of Maydis Stigma might possess some pharmacological effect on the motility of the isolated rabbit uterus. The experiment was performed making the use of several agents related to the uterine motility such as acetylcholine, pilocarpine, epinephrine, atropine, barium chloride, quinine sulfate and oxytocin. The motility of the isolated rabbit uterus in Tyrode' solution was recorded with the electric kymograph according to Magnus method. The results of the experiment are as follows. 1. The motility of the isolated pregnant and nonpregnant rabbit uterus represents the tendency of gradual contractility in proportion to the concentration of ZW $10^{-4}$, $5{\times}10^{-4}$ and $10^{-3}$. 2. The uterine contractile effect of ZW $10^{-3}$ probably seems to antagonize the effect of epinephrine $10^{-6}$. 3. ZW $10^{-3}$ does not seem to have the significance with barium chloride, quinine sulfate and oxytocin respectively.

• 보존과학회지
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• 제35권5호
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• pp.385-391
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• 2019

인도네시아 보로부두르 보존처리소에서 촬영한 보로부두르 사원 흑백 사진의 재질 특성을 조사하기 위해 과학적 분석을 수행하였다. 흑백 사진에서 시료를 채취하여 현미경 조사, 성분 및 재질 분석을 진행한 결과 흑백 사진은 지지체, 바리타층, 바인더층, 표면층 등 4개의 층으로 구성되어 있는 것을 확인하였다. 지지체는 마섬유로 구성된 종이, 바리타층은 분말상태의 황산바륨(BaSO₄), 바인더층은 할로겐화은이 함유된 유제, 표면보호층은 젤라틴을 사용하여 제작된 것으로 판단하였다. 사진은 구성 재질에 따라 특성 및 보존 환경이 다르므로 시대에 따른 다양한 흑백 사진 재질 특성에 대한 연구가 필요하다.

• 대한한방내과학회지
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• 제22권3호
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• pp.397-403
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• 2001

Objectives; This study was carried out to investigate the motor activity, glucose transport and metabolism of Jiaweizhengqi-tang(JKT) in rat small intestine. Methods ; The motor activity of the rat small intestine has been investigated by means of measuring barium sulfate passage degrees. Transport and metabolism of glucose were studied in everted sac of rat small intestine with incubation under several conditions. Results; Atropine treatment significantly delayed barium sulfate transit, and JKT pretreatment increased intestinal motor activity, but not significant. JKT administration showed renal toxicity in animal experiment, so clinical safety should settled to use commonly. The transport and metabolism of glucose were greater at jejunum than ileum. So, everted jejunum of rat were used to study the effect of JKT. When JKT were treated, the concentration of glucose were higher than untreated group. This result was thought to be influenced by the glucose in JKT. When 2, 4 dinitrophenol was treated, the transport and metabolism of glucose were decreased, but JKT treated together, the concentration of glucose in serosal solution increased. Conclusions; The transport and metabolism of glucose were influenced by the glucose in JKT. And the effects of JKT were still unidentified, but through continuous investigation, these effects of JKT should be identified.

• 폴리머
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• 제34권4호
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• pp.352-356
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• 2010

2개의 종횡비에 의해 특징지어진 3차원 타원체를 사용하여 PP복합체의 충전제 형태와 함량이 열팽창률에 미 치는 영향에 대해 Lee와 Paul에 의해 제안된 이론적인 값과 실험적인 결과값이 비교분석되었다. 충전제의 형태는 구형에 황산바륨을, 섬유형에는 유리섬유를, 판상형에는 운모를 사용하였다. 실험의 결과로서 구형을 갖는 황산바륨 은 종횡비가 1의 값을 갖고 이론과 같이 열팽창률이 감소하였다. 유리섬유의 경우 함량증가에 따라 종횡비는 42, 37, 25, 20으로 감소하였으며 종단방향에선 열팽창률이 감소하였지만 수직방향에서는 증가하였다. 운모의 경우 그 함량증가에 따라 모두 종단방향과 횡단방향에서 감소하고 수직방향에서 증가하였다. 종횡비의 값은 각각, $\rho_\alpha$=13.5, $\rho_\beta$=1.8이었다.

• 폴리머
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• 제38권1호
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• pp.103-107
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• 2014

이축압출공정을 이용하여 poly(acrylonitrile-butadiene-styrene)(ABS)에 titanium dioxide($TiO_2$), barium sulfate($BaSO_4$), calcium carbonate($CaCO_3$)를 함량별로 첨가하여 복합체 쉬트를 제조하였고 복합체 쉬트의 반사율과 굴곡 탄성률을 측정하였다. ABS에 첨가된 충전제의 분산성이 우수한 것을 형태학을 통해 알 수 있었다. $TiO_2$와 $BaSO_4$의 함량에 따라 복합체 쉬트의 반사율이 증가하였고, 특히 $TiO_2$ 20 wt%에 $BaSO_4$를 5~20 wt%를 첨가한 복합체 쉬트의 경우 반사율이 95%이상이 얻어졌다. 굴곡 탄성률 또한 $TiO_2$와 $BaSO_4$의 함량에 따라 증가하여 $ABS/TiO_2/BaSO_4$ 조성비 85/10/5(w/w/w)의 1864 MPa에서 $ABS/TiO_2/BaSO_4$ 조성비 55/20/25(w/w/w)의 3134 MPa로 증가하였다.

• 대한한방내과학회지
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• 제11권1호
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• pp.15-27
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• 1990

For the purpose of examing on the efficancy of the Boolwhangumjeonggisan and on the effect of the Boolwhangumjeonggisan, dropsy animals given water boil ding abstraction exgis power. What made an experiment, the motility of isolate ileume, anticathartic action, the action of gastric juice, tied pylous ulcer and inhibited vomitting. 1. Boolwhangumjeonggisan displayed great suppresion effect in regard to automatic movement of the motility of isolated of mice and displayed anti-acethylcholine action, antibarium chloride action. Thus, the origin of muscle relaxation for internal smooth muscle is admitted. 2. It displayed great rexation effect in regard to fraction of rat's stomach and displayed contentional effect in regard to a cetylcholine and barium chloride. 3. It decreased rat of barium sulfate transport through the small intestine of mice. 4. It recognized anti-cathartic action, rat suffered from leading diarrhea by caster oil. 5. Total activity, pepsin secretion decreased and increased the pH of stomach in Shay's method. 6. It recognized powerful prevention effect on tied pylous ulcer. 7. It inhibited vomitting by administration of CuSo4 in frog.

• Bulletin of the Korean Chemical Society
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• 제29권5호
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• pp.1007-1012
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• 2008

Spray pyrolysis has been found as an excellent method for the preparation of mesoporous barium sulfate at higher temperature. Ethylene glycol, a reducing agent, and solvents had good inhibition effect for the preparation of $BaSO_4$ nano particles. The $BaSO_4$ solution was sprayed at 500 & 800 ${^{\circ}C}$ using different solvents such as methanol, ethanol, propanol and n-butyl alcohol. $N_2$ adsorption-desorption isotherm revealed that $BaSO_4$ is micropore free, possessing narrow mesopores size distribution and high BET surface areas of 72.52 $m^2\;g^{-1}$ at 800 ${^{\circ}C}$ using propanol as an additive. Scanning electron microscopy (SEM) indicates that the morphology of $BaSO_4$ nano material shows uniform shell like particles. Transmission electron microscopy (TEM) proved that the resulting BaSO4 nano particles were uniform in size and the average particle size was 4-8 nm. The surface functionality and ethylene glycol peaks were assessed by Fourier transform infrared resonance (FTIR) spectroscopy. Low intensity ethylene glycol specific absorption peak was observed in propanol which proved that propanol had good inhibition effect on the structural morphology of nano particles.

• 한국방사선학회논문지
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• 제10권8호
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• pp.559-563
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• 2016

최근 납의 대체물질로서 연구되고 있는 바륨(Ba)과 요오도(I) 등은 차폐능은 우수하지만, 30 keV 근처의 에너지 영역에서 특성 X선이 방출되는 문제점이 있다. 본 연구에서는 황산바륨($BaSO_4$)과 산화비스무스(BiO)로 구성된 친환경 이중차폐체의 적용가능성을 검증하기 위한 선행연구로 몬테카를로 시뮬레이션을 통해 투과스펙트럼, 차폐율 등을 평가하였다. 평가결과, 0.6mm 두께의 Pb 단일층과 비교하여 0.1 mm 두께의 $BaSO_4$ 하부층에 BiO 층의 두께가 0.4 mm 와 0.5 mm에서는 각각 차폐율이 1.9 %, 3.9 % 높은 성능을 보였다. 뿐만 아니라, 상대적인 중량 또한 각각 34.5 %, 28 % 경량화가 가능하다는 것을 알 수 있었다.

• 한국임상수의학회지
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• 제11권1호
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• pp.377-381
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• 1994

This study was performed to investigate the usefulness of the radiopaque material as a disintegration test of enteric coated capsules radiologically. The results obtained were as follows; 1. The times that the enteric coated capsules passed the pylorus(GI transition times) were the first 150 minute and the last 390 minutes. Therefore, the GI transition times largely differ from each animal and each enteric coated capsule. 2. The disintegration times of enteric coated capsules were similar in vitro test and in vitro test. 3. The disintegration test of enteric coated capsules using Barium sulfate, radiopaque material for the gastrointestinal track, was useful to check the time pass through the pylorus and the time enteric coated capsules were disintegration.