열가소성 고분자 복합재료 개발을 위하여 매트릭스 수지로는 폴리프로필렌섬유(PP)를 사용하고 유기계 강화소재로 폴리비닐알코올(비닐론, VF), 아라미드(케블라-49, KF) 및 폴리아미드섬유(PAF)등을 사용하였다. 복합매트제조장치로서 복합매트를 제조하고 가열.압축하여 고분자 복합재료를 성형하였다. 제조한 고분자 복합재료의 형태학, 유변학적 및 기계적특성 등을 측정하였다. 형태학에서 미트릭스와 강화섬유 간의 젖음성은 강화섬유의 함량이 증가함에 따라 감소하는 경향을 보였다. PAF/PP와 VF/PP 복합재료에 대한 점성도는 낮은 주파수 영역에서 강화섬유의 함량이 증가됨에 따라 증가하였으나, 높은 주파주 영역에서 5-20wt%로 강화된 복합재료는 매트릭스인 PP에 근접하게 감소된 점성도를 나타냈다. 기계적 특성은 강화 섬유의 함량에 따라 변하였으며, VF/PP 및 KF/PP 복합재료가 PAF/PP 계에 비해 우수한 현상을 보였다.

버즘나무를 가해하는 우리나라 미기록 해충이 발생되어 동정한 결과 버즘나무방패벌레(신칭)로 확인되었다. 성충은 체장이 3.0~3.2mm이며 외견상 유백색을 띠고 있고 노숙약충은 검은색을 띠고 있다. 버즘나무의 잎 뒷면에 모여 흡즙 가해하며 피해엽은 황백색으로 변한다. 본 해충은 1995년 9월말 현재 서울, 경기, 강원, 충북, 충남 등 중부지방에 분포하고 있는 것으로 나타났다.

The objective of this study is to investigate the direct effects of green tea catechins(GTC) on vascular smooth muscle tension and ^(46)Ca^(2+) uptake in rat aorta. The methods used in this study are isometric tension measurements using physiograph, Lanthanum method for ^(46)Cac^(2+) (2 uCi/ml) uptake measurement in rat aorta. GTC modified tension induced by 40 mM KCl or 1 uM norepinephrine in rat aorta. Low concentrations of GTC($lt;0.5 mg/m increased tension by 40 mM KCl or 1 tM norepinephrine, individually. However, high concentrations of GTC($gt; 0.5 mg/ml) inhibited tension by 40 mM KCl or 1 uM norepinephrine, individually. GTC increased ^(45)Ca uptake induced by 40 mM KCl in a dose-dependent manner. From these results, GTC has the dual actions in vascular smooth muscle in vitro. Low concentrations of GTC augments tension by K or norepinephrine. However, high concentrations of GTC inhibits tension by K or norpeinephrine. GTC may have Ca^(2+) channel activation action, which may result in unphysiological vasodilation by Ca^(2+) overload in vascular smooth muscle.

Green tea catechins(GTC) were studied for its inhibitory effect on human platelet aggregation in vitro, for its antithrombotic effect in mice in vivo, and for bleeding and clotting time in rats. The catechins were isolated and purified from green tea, which were composed of (-)-epigallocatechin gallate, (-)-epigallocatechin, (-)-epicatechin gallate and (-)-epicatechin. GTC produced a potent inhibition of human platelet aggregation in a dose-dependent manner against the stimulants such as ADP, collagen, epinephrine and ristocetin in vitro. GTC also prevented death due to the formation of pulmonary thrombosis by platelet aggregates in mice in a dose-dependent manner in vivo. GTC increased the bleeding time, whole blood clotting time and plasma clotting time in rats, too. These results suggest that GTC is a promising antithrombotic agent.

The genotoxicity of combinations of four p-oxybenzoic acids (methyl paraben, ethyl paraben, isopropyl paraben, butyl paraben) and benzoic acid had been evaluated. The in vitro Ames test using Salmonella typhimurium (TA 98, TA 100, TA 1535, TA 1537) and the in uiuo micronucleus assay using mouse peripheral blood were performed. Methyl paraben plus benzoic acid, ethyl paraben plus benzoic acid, and ethyl paraben plus butyl paraben slightly increased the frequency of micronucleated reticulocytes in the high doses, but were negative in Ames test with Salmonella typhimurzum with and without rat liver microsomal activation. The other combinations tested were negative in Ames test and did not show any clastogenic effect in micronucleus test. These results suggest that genotoxicity can produced by the combinations of p-oxybenzoic acid.

One of the main problems in evaluating complex objects, such as an ill-defined system, is how to treat ambiguous aspect of the evaluation. Due to the Complexity and ambiguity of the objects, many types of evaluation attributes should be identified based on the rational dsision. One of these attributes is an analytical hierarchy process (AHP). the weight of evaluation attribtes in AHP however comes from the probability measure based on the additivity. Therefore, it is notapplicable to the objects which have the property of non-additivity. In the previous studies by other researchers they intriduced the Hierarchical Fuzzy Integral method or mergd AHP and fuzzy measure for the analysis of the overlaps among the evaluation objects. But, they need more anlyses in terms of transformation of the probability measure into fuzzy measure which fits for the additivity and overlapping coefficient which affects to the fuzzy measure. Considering these matters, this paper deals that, ⅰ) clarifying the relation between the fuzzy and probability measure adopted in AHP, ii) calculating directly the family of fuzzy measure from the overlapping coefficient and probability measure. A simple algorithm for the calculation of fuzzy measures and set family of those from the above results is also proposed. Finally, the effectiveness of the algorithm developed by applying this to the problems for estimation of safety in ship berthing and for evaluation of ports in competition is verified. This implied that the new algoritnm gives better description of the system evaluation.

고주파 이동통신의 효용이 증가할수록 고주파 회로에 들어가는 부품들의 소형화가 중요한 과제로 대두되고 있다. 인덕터는 전자회로에 이용되는 주요 부품의 하나이며, 현재 교주파용 소형 인덕터를 박막화하려는 시도가 진행중이다. 본 연구에서 열산화시킨 Si(100)기판위에 성공적으로 박막형 인덕터를 제조하였다. Core 물질로는 ion beam sputtering 법으로 증착한 Ni-Zn 페라이트와 PECVD법으로 증착한 SiO2를 사용하였다. 고온산화분위기의 박막 증착과정을 고려하여 귀금속류인 Au를 전극으로 이용하였으며, life-off법으로 미세회로를 구현하였다. 상하부 전극의 안정적인 연결을 위하여 2차 전극배선 전에 via를 채워넣었다. 제조된 박막 인덕터의 고주파 특성은 network analyzer로 측정한 후 HP사의 Mecrowave Design System으로 분석하였다.

In order to study the effects of Aloe vera Linne treatment on the clinical chemistry in patients with liver disease, seven patients were administered orally with 800-1, 600 mg of Aloe vern Linne four times a day for six months. The high levels of serum AST, ALT, ALP, γ-GTP and total bilirubin in patients were significantly reduced by administration of Aloe vem L.. The reduced serum albumin/globulin value was increased by Aloe vera L. treatment. But other blood parameters of clinical chemistry values were not affected by Aloe very L. treatment. These data suggest that Aloe very L. can be effective in treatment of the patients with liver disease.

In order to study the effects of Aloe vera treatment on blood glucose level and clinical chemistry in diabetic patients, eight diabetic patients were administered orally with 800 mg of Aloe vera three times a day for three months. The high levels of blood and urine glucose in diabetic patients were significantly reduced by administration of Aloe vera. The increased plasma triglyceride concentration was also significantly reduced by Aloe vera treatment. A little amount of urine bilirubin, hematuria, nitrite, urobilinogen, protein and ketone bodies were detected before treatment, but not detected after Aloe vera treatment. But other blood parameters of clinical chemistry values were not affected by Aloe vera treatment. These data suggest that Aloe vera can be effective in the treatment of the diabetic patients,

In order to establish the enzyme linked immunosorbent assay(ELISA) of sterigmatocystin produced by Aspergillus versicolor, we experimented and obtained following results. Two of three rabbits which had been immunized with sterigmatocystin-hemiacetal-BSA produced antibodies against sterigmatocystin at 15 weeks. The produced antibodies were specific for sterigmatocystin and sterigmatocystin-hemiacetal but didn't cross react with other sterigmatocystin analogues in a significant degree. DMF : 4% KCl (18:2) mixed solution was most effective to dissolve sterigmatocystin. For the preparation of sample solution to determine sterigmatocystin by ELISA, sample was extracted with CHCl₃ and dried, then the dried sample was redissolved with 100 ul DMF+4% KCl mixture. 10-1,000 ng/ml level. of standard sterigmatocystin could be applied to the established ELISA. When artifically contaminated rice were assayed by the ELISA, the average recovery of sterigmatocystin spiked to 25-500 ng/g was 109% (97-116%), and mean interwell coefficient of variation was 21% (11-28%).

본 연구는 식품의 물성을 측정하기 위한 한 가지 방법으로 50변위를 아주 정밀하게 직선적으로 측정이 가능한 linear proximity sensor(선형 근접 센서)를 활용하여 식빵의 굳기를 측정하였다. 선형 근접 센서를 장착한 기구로 몇 가지 응력(0.376 0.543, 0.769 kPa) 하에서 식빵의 온도와 수분 함량에 따른 변형을 컴퓨터 자동 자료 수집 장치를 통하여 on-line 상태로 매초마다 자료를 수집하여 컴퓨터 자료 분석 program으로 그래프를 얻었다. 식빵에 적용한 응력과 strain의 비율은 응력이 클수록 그 값이 커지는 비 선형 점탄성체의 성질을 보였다. 이 측정 기구는 좁은 온도 범위와 작은 수분함량의 차이가 따른 식빵의 굳기의 정도에 현저한 차이가 있음을 관찰할 수 있었다. 선형 근접 센서를 활용한 이 기구는 간단하면서도 정밀하게 동적으로 식품의 물성을 측정할 수 있었고, 높은 반복성을 나타내었다. 또한 수집된 자료는 점탄성체의 특성을 설명하는 기계적인 모형으로 나타낼 수 있었다. Inokuchi의 방법을 적용하여 식빵의 물성을 모형화 하면 용수철과 완충 장치의 조합으로 나타내는 Burger`s모형에 잘 일치하였다. 본 측정 장치는 설치와 사용이 간단하여 식빵과 같은 연 식품의 물성을 측정하는데 활용이 용이하였다.

Actinoplanes missouriensis KCTC 1780를 packed bed bioreactor system에 이용하여 고과당 시럽 ( high fructose syrup )을 효과적으로 생산하기 위하여 응집방법에 의해 균체를 고정화하였다. 먼저, 응집제로 사용되는 polyethylenimine의 농도는 5%, 가교제인 glutaraldehyde의 농도는 0.2%가 적합하였다. 이 때의 응집균체량은 배양액 100㎖당 10.3g(wet weight)이었고, 응집균체의 최적 pH는 7.0, 최적 온도는 75℃ 이었다. 포도당 이성화 반응에 activitor로 작용하는 Mg^2+의 최적 농도는 0.1M이었고, 이 때의 glucose isomerase 활성은 약 40% 증가하였다. 회분식 배양에 있어서의 이성화율은 31%에 달했으며, packed-bed bioreactor의 최적 조건하에서 glucose로 부터 fructose로의 최대 이성화율은 약 40%에 달하였다.