• Polymer(Korea)
• /
• v.26 no.3
• /
• pp.335-343
• /
• 2002

Blend resin (PET/PETG 70/30 blend) of poly (ethylene terephthalate) (PET) and poly (ethylene terephthalate glycol) (PETG) of weight percent 70/30 was prepared by a twin-screw extruder. Undrawn films of the blend and pure PETG were made by melt-press in hot press. Drawn films were made by capillary rheometer. Crystallinity, shrinkage, thermal, dynamic mechanical, and mechanical properties of these blends and PETG drawn films were investigated by wide angle X-ray diffractometer, dry oven, DSC thermal analyzer, and tensile tester. The crystallinity and density of these films increased with increasing draw ratio and draw rate but decreased with increasing draw temperature. The crystallinity and density of the blend films were higher than those of PETG films. The tensile strength and tensile modulus of these drawn alms increased with increasing draw ratio and draw rate but decreased with increasing draw temperature. The tensile strength and tensile modulus of blend films were higher than those of PETG films. Shrinkage of PETG md blend films decreased with draw ratio and draw rate. Shrinkage of undrawn blend film was 600% higher than that of pure PET film.

• Proceedings of the Ginseng society Conference
• /
• 1988.08a
• /
• pp.87-91
• /
• 1988

We studied the effects of red ginseng on blood pressure (BP) and the quality of life (QOL) in 19 hypertensive patients treated with antihypertensive agents. Red ginseng was administered at a dosage of three grams a day for three months. Systolic blood pressure was significantly lowered during the administration period of red ginseng. while diastolic blood pressure and hear1 rate remained unchanged. QOL was significantly improved in $89\%$ of the patients. Among the QOL variables. sleep disorder. thirst. fatigue. mood. sexual life and general well-being were improved. Furthermore. an improved coefficient of variation of R-R intervals $(CV_{R-R})$ was observed during the period. A month after the cessation of red ginseng systolic blood pressure returned to the level before the administration and QOL variables detariorated to previous pre-treatment states. These results suggest that red ginsing may lower systolic blood pressure and may improve QOL in patients treated with antihypertensive agents.

• Journal of Korean Medical classics
• /
• v.18 no.3 s.30
• /
• pp.9-16
• /
• 2005

종의역학적각도간(從醫易學的角度看), 우주적팽창일수축반복가설부합음양소장과정. 우주팽창시(宇宙的膨是)‘양생음장(陽生陰長)’, ‘양성음쇠(陽盛陰衰)’적과정(的過程) ; 우주수축시(宇宙收縮是)‘양살음장(陽殺陰藏)’, ‘음성양쇠(陰盛陽衰)’적과정(的過程). 종수축도팽창(從收縮到膨脹), 종팽창도수축(從膨脹到收縮), 기전환점시양극혹음극적상태(其轉換點是陽極或陰極的狀態), 응용(應用)’음극변양(陰極變陽), 양극변음(陽極變陰)‘적음양극변원리(的陰陽極變原理). ${\lceil}$내경(內經)${\rfloor}$인위물질화시공(認爲物質和時空), 시간화공간본질상시일치적(時間和空間本質上是一致的), 도시종기파생출래적(都是從氣派生出來的). ${\lceil}$내경(內經)${\rfloor}$이경인식도료시공적통일성화상대성(已經認識到了時空的統一性和相對性). 저여애인사탄상대론적시공관유상동지처(這與愛因斯坦相對論的時空觀有相同之處). 서방과학적시공관시통과대물질실체이급물질상호관계적관찰이형성적물리시공관(西方科學的時空觀是通過對物質實體以及物質相互關係的觀察而形成的物理時空觀) ; 의역시공관시통과대포괄인류재내적천지만물적일절생명활동현상적관찰이형성적생명시공관(醫易時空觀是通過對包括人類在內的天地萬物的一切生命活動現象的觀察而形成的生命時空觀).

• Proceedings of the Korea Concrete Institute Conference
• /
• 2009.05a
• /
• pp.383-384
• /
• 2009

It is hard to predict shrinkage and creep that are influenced of exposure conditions, mix designs, and loading conditions etc. This paper present an evaluation of the reliability of the five shrinkage and creep prediction models using eight test data that are obtained from domestic FCM bridge concrete. For the reasonable evaluation of model and actual data, five statistical methods were used.

• Journal of the KSME
• /
• v.35 no.8
• /
• pp.725-736
• /
• 1995

소노루미네센스(SL)현상은 액체 내에서 초음파에 동기화되어 진동하는 미소기포$~10\mu\textrm{m}$)가 수축할 때 기포내부의 온도가 고온이 됨에 따라 기포중심으로부터 빛이 나오는 현상을 말한다. 단일기 포가 초음파에 가진 될 경우 그 스펙트럼이 X선에 가까운 것임이 밝혀질뿐더러 촉매물 질의 개발이나 활성화, 고분자 합성뿐만 아니라 용액 내에서의 불순물 제거 등에 대한 응용의 가능성이 속속 발견되자, 현재 과학계뿐만 아니라 일반 매스컴에서도 화제의 대상이 되고 있다. SL현상은 원자당 $10^{11}eV$ 에 해당되는 초음파 에너지의 파장이 0.19.mu. 이하인 X선, 즉 6eV 이상의 광자에너지로 증폭됨에 따라 기포수축시 기포내 가스의 온도가 수만 도에 이르는 것, 레이저에 상응하는 광펄스 폭(50 ps)과 초음파에 동기되어 현존하는 최상의 수정시계에 필적하는 SL펄스의 규칙성, 기포수축시의 $10^{10}W/m^{2}$에 해당되는 열의 방출과 10억분의 수 초 동안에 $10^{4}K$의 고온상태에서 200K 정도의 저온상태로 바뀜에 따른 급격한 냉각속도 등 으로 특징지어질 수 있다. 이 글에서는 현재 실험을 통하여 알려진 SL에 관한 현상의 특징과 응용에 대해 구체적으로 기술하였다.

• 건강소식
• /
• v.31 no.8 s.345
• /
• pp.30-31
• /
• 2007

천식은 기도가 수축하고 염증이 생기는 흔한 만성 호흡기 질환이다. 천식은 평소에도 기관지에 염증이 존재하므로 가벼운 자극에도 쉽게 기도가 좁아지게 되어 천명음(숨쉴 때 쌕쌕거리는 소리), 기침, 가슴이 답답함, 호흡곤란 등의 증상이 나타나게 된다. 만일 치료를 하지 않고 그대로 방치한다면 오랫동안 폐 기능이 감소된다. 아직까지 천식을 완치할 수 있는 치료법은 발견되지 않았지만, 올바른 방법으로만 하면 성공적으로 관리할 수 있는 질병이다.

• Journal of Food Hygiene and Safety
• /
• v.2 no.2
• /
• pp.57-65
• /
• 1987

ABSTRACT - To examine antihypertensive components of Ganoderma lucidum in Korea, two kinds of fruiting bodies (J and K) were used for extraction with water and the extracts were purified by ethanol precipitation and dialysis. Three fractions, i.e., the aqueous total extract(A), the ethanol supernatant(B} and the purified precipitate(C), were compared for antihypertensive activity in anesthetized spontaneously hypertensive rats (SUR). Although fractions A and B showed the activity, fraction C did not. Particularly, fraction B of sample K produced 44.3% reduction in diastolic blood pressure and 30.6% reduction in heart rate after i.v. administration of a dose of 10 mg/kg. Direct effects of this fraction B to the heart were observed in the isolated blood perfused heart preparation of the dog. It induced positive chronotropic and inotropic responses dose-dependently in the case of sample J. In the case of sample K, marked chronotropic and inotropic effects on atrial muscle but not on ventricular muscle were induced. In both samples, coronary blood flow (CBF) was dose-relatedly increased.reased.

• Journal of Yeungnam Medical Science
• /
• v.7 no.1
• /
• pp.61-68
• /
• 1990

To assess the role of multiple factors in influencing occurrence of ventricular premature complexes after acute myocardial infarction twenty-four hour Holter electrocardiographic tape recording were made in 40 survivors of an acute myocardial infarction 10 to 20 days after attack. Ventricular premature complexes were found in 72.5percent of the patients. The incidence and grade of ventricular premature complexes in the early postinfarction period were not correlated with left ventricular function, age, sex, smoking, dibetes mellitus, previous angina, and previous myocardial infarction. The occurrence of ventricular premature complexes showed a positive correlation with the occurrence of ST-T change. The occurrence of ventricular premature complexes during sleep hours was compared to the awake state. In 22 patients. the incidence of ventricular premature complexes was reduced during sleep. If patients free of ectopic activity during 24-hour monitoring sessions are excluded from analysis, the 22 of patients, or in 76percent, sleep was associated with a lowered occurrence of ventricular extrasystoles.

• Journal of Chest Surgery
• /
• v.38 no.9 s.254
• /
• pp.648-651
• /
• 2005

Calcific constrictive pericarditis is considered to be a nonspecific response to chronic inflammation. This disease has become rare, because the cause of it is usually tuberculosis, which has the tendency to decrease. Other possible causes of it include radiation, rheumatoid disorders, sarcoidosis, and trauma. Whatever the etiology, it can lead to cardiac tamponade by reducing cardiac diastolic filling. We report, herein, the case of a patient with heart failure by a calcific pericardial ring.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2008.11a
• /
• pp.733-736
• /
• 2008

In this study, we developed durability promoting chemical agent(HD) that simultaneously improved resistance for chloride attack and shrinkage of concrete. This agent as typed aqueous solution containing organic and inorganic compounds applied to concrete mix(Bx0.6%, 1.2%) of seaside construction using SLG and then evaluated the effect on the shrinkage and chloride attack of concrete. By the addition of HD, it was elucidated that resistance for chloride attack and shrinkage were improved above 50% and 33% respectively than non-added concrete(Plain). This performance was confirmed through the Field-test applied HD(Bx0.6%) such as RCD construction.