플루오르토파즈와 휘스커 뮬라이트의 제조와 특성평가

심일용,이홍림,문종수,강종봉 경남대학교 신소재연구소 2002 신소재연구 Vol.14 No.-

본 연구에서는 1200℃의 저온에서 침상형 뮬라이트를 합성하고, 이러한 침상형 뮬라이트를 생성하는 메카니즘을 관찰함과 동시에 메카니즘을 활용한 제어된 미세구조를 가진 뮬라이트를 합성하고자 하였다. Al원으로 사용되는 원료로서는 Al(OH)_3를 사용한 경우가 Al_2O_3를 사용한 결과보다 더욱 발달된 휘스커상의 뮬라이트를 얻을 수 있었다. 각 온도구간에서 열처리한 시편은 미세구조 관찰과 상분석을 통하여 플루오르토파즈와 휘스커상의 뮬라이트의 생성을 관찰하였으며, 토파즈상을 거쳐간 휘스커 뮬라이트의 생성은 하나의 토파즈 상에서 여러 방향으로 휘스커상의 뮬라이트가 성장되는 것을 관찰할 수 있었다. 1200℃에서 생성된 휘스커상의 뮬라이트는 [001] 방향으로 성장하였으며, (110)면의 면간거리는 5.34Å이었다. 과량의 Al(OH)_3를 참가하였을 경우 기존의 8:7:4 원료조합보다 11:7:4의 경우에 조대한 단일상의 휘스커 뮬라이트를 관찰할 수 있었으나, 그 이상의 Al(OH)_3의 첨가는 미반응 Al_2O_3로 인하여 단일상의 뮬라이트를 얻지 못하였다. Whiskered mullites were synthesized at relatively low temperature of 1200℃, and mullite forming mechanism was studied in this experiment. Al(OH)_3 as a raw materials was better in getting whiskered mullite than Al_2O_3. Microstructure and phase analysis were done for the specimens heat treated at various temperatures. It was found that the synthesized mullite had grown to [001] direction, and that the distance of (110) plane was 5.34Å. Al(OH)_3 addition resulted in larger mullite whisker than normal 8:7:4 ratio, but excessive Al(OH)_3 didn't affect the growth of mullite whisker.

노동력 이동과 임금: 이차원적인 접근

심정택,박용일 昌原大學校 産業經濟硏究所 1994 産經硏究 Vol.11 No.-

地下水位別 滯水處理가 小麥의 生育과 收量에 미치는 影響

沈一用 안성산업대학교 1995 論文集 Vol.27 No.-

This experiment was conducted to determine the effects of various soil in excess moisture injury upon the underground water level to wheat and studies on the damage due to excessive water in the soil of wheat cultivated on the plastic pot in the green-house of the An-Song national university for 2 years during 1984 to 1985 and the wheat culture used on this experiments was olmil (#5 mil-yang). The results obtained are sumariged as follow; (1) From the studies on the effects of times of submersion on the vegetative growth and yield characters, the following results were obtained. The wheat were damaged submersion soil during wheat growth. The degree of damage was increased as the times of whater submersion were increased, expecially, the wheat which were submerged during 10cm ground water level were seversly damage and next severe damage was occured when wheats in 20cm, 30cm and 40cm under ground water level were submerged. (2) From the studies on the effects of under-ground water levels on wheat growth and yields. The fallowing results were obtained, the damage due to the underground water levels was least in 10cm of water levels, the degree of damage was in the order of 20cm, 30cm and 40cm. (3) Under condition of high underground water levels the Fe++ and Mn was higher in the root and N. P. and K were found were in the stems and leves, the soil Eh was low when the underground water level was low. (4) The chlorophyll contant was increased as the underground water levels get higher, the same was tue for the respiration and photosyntheses rate underground water levels. (5) Grain yield per wheat was seversly damaged by hi호 ground water level fallowing grain weight per spike, number of grains per plant, spike weight, 1,000 grain weight, number of grains per spike, number of spikes per plant and clum length at 40 cm 30cm 20cm and 10cm of underground water levels respectively, with comparison of check.

효모의 발현 Vector 계의 개발

황용일,심상국,오시마 야스지,정동효 中央大學校 遺傳工學硏究所 1990 遺傳工學硏究論集 Vol.3 No.1

The cloned gene of glyceraldehyde-3-phosphate dehydrogenase(GAP) of Saccharomyces cerevisiae (Holland et al., 1983) has been characterized. Based on the communication, we have also cloned 2.1kb GAP DNA fragment and modified that fragment as a portable promoter. Two yeast exression vectors, one is a YCp type vector being maintained at low copy number(1 or 2) and the other is a YEp type vector at high copy number, have been constructed with the GAP promoter PH05' gene as an indicator gene. Our plasmids were introduced into Saccharomyces cerevisiae. HU-1, which has been improved. The Trp+ transformants expressed APase activity efficiently and showed the high level of PH05' transcripts.

유자과즙을 이용한 식초제조

김용택,서권일,정용진,이용수,심기환 동아시아식생활학회 1997 동아시아식생활학회지 Vol.7 No.3

To enhance the utility value of citron, vinegars were made of citron juice, their properities were investigated, the results are as following. Optimum bacteria was Acetobacter sp. PA 97 for the citron vinegar fermentation, optimum temperature, initial acidity and alcohol concentration were 30℃, 1.5% and 8%, respectively. The lower citron juice was added, the more citric acid was produced, the acidity of sample added sub-nutrition source was higher than that of sample no added. In samples added citron juice of 10, 20 and 30%, and sub-nutrition source, total acidity were 5.42, 5.36 and 5.04%, pure acetic acid yields were 52.69, 45.25 and 35.10%, respectively. Remained alcohol of sample no added sub-nutrition source was more than that of added. In the sensory test, the most suitable concentration of citron juice for vinegar fermentation was 30%.

밤꽃의 화학성분

이용수,서권일,심기환 동아시아식생활학회 1997 동아시아식생활학회지 Vol.7 No.3

To obtain fundamental data from chestnut flower, chemical properties were investigated. The results are as follows. The contents of total sugar, reducing sugar, crude protein, crude fat and ash in prebloomed chestnut flower were 10.44, 4.91, 8.80, 1.42 and 0.87%, in the postbloomed were 11.75, 7.04, 7.71, 2.26 and 0.66%, respectively. The browning degree of the extracts from the prebloomed sample was higher than that of the postbloomed. The contents of flavonoids and nonflavonoids in the prebloomed sample were 7.05 and 0.52%, in the postbloomed were 2.08% and 0.22%, respectively. The contents of free sugars such as sucrose, fructose and glucose in the prebloomed sample were 2.90, 0.72 and 0.71%, in the postbloomed were 2.65, 2.10 and 2.20%, respectively. The major amino acids in the prebloomed sample were threonine, proline and cystine and its contents were 28.96, 12.49 and 11.43%. But aspartic and glutamic acid were major amino acids in the postbloomed and its contents were 16.19 and 11.90%, respectively.

土壤에서 PCNB의 殘留消長과 微生物 活性에 미치는 影響

曺日奎,沈在漢,徐鎔澤 全南大學校 農漁村開發硏究所 1988 農業科學技術硏究 Vol.23 No.-

PCNB를 土壞에 處理하여 PCNB의 分解樣相, 殘留消長, 微生物, 生菌數 및 酵素生性에 미치는 影響을 經時的으로 調査하여 얻는 結果를 要葯하면 다음과 같다. 湛水土壞에서의 半減期는 7.9日이었고 非湛水土壞에서는 22.5日로서 湛水土壞에서는 분해가 非湛水土壞에서보다 빨랐다. 減菌湛水土壞에서의 半減期는 82.4日이었고 減菌非湛水土壞에서는 89.9日로서 減菌土壞에서는 非減菌土壞에서보다 分解速度가 緩慢하였다. 非湛水土壞에 PCNB를 5㎍/g濃度로 處理한 45日 후에 PCNB의 약 46%가 그 分解産物인 pentachloroaniline(PCA)으로 變換되었으며 減菌土壞에서는 PCA가 確認되지 않았다. PCNB가 微生物生菌數 에 미치는 影響을 조사한 結果 bateria와 fusarium,屬菌은 藥劑의 影響을 받지 않았고 actinomycetes와 fungi는 약간의 沮害를 받았다. 또 PCNB가 效素活性에 미치는 影響은 phoshoatase, protease, dehydrogenase 및 ß- glucosidase의 順으로 沮害率이 增加하였다. This study was carried out to investigate the persistence and the biodegradation pattern of pentachloronitrobenzene(PCNB) in soil. The effect of PCNB on soil microorganisms and enzyme activities were also determined. The results obtained are summarizexi as follows . Half-life of PCNB was 7.9 days in unsterilized submerged soil and 22.5 days in unsterilized moist soil. However, half-life of PCNB was 82.4 days in sterilzed submerged soil and 89.9 days in sterilized moist soil. PCNB was more rapidly degraded in unsterilized submerged soil than in sterilized soil. Loss of PCNB in unsterilized submerged, moist soil was accompanied by an increase in pentachloraniline (PCA), the principal degradation product, residue. But PCA was not detected in the sterilized soil. About 46% of the original PCNB was degraded in 45 days incubation in unsterilized submerged soil, which was evidenced by the production of PCA. Of the effect of PCNB on soil microorganisms and enzyme activities, number of bacteria and fusarium in soil was nearly unchanged, that of actinomycetes and fungi was decreased, and that of pythium was decreased strongly. The effect of PCNB on me activities in soil increased in the order: phosphatase<pro-tease<dehydragenase<ß-gluccsidase.

전어의 보존중 겨자의 처리 효과

서권일,강갑석,이용수,정용진,김용택,심기환 동아시아식생활학회 1996 동아시아식생활학회지 Vol.6 No.2

Effects of mustard seed(Brassica juncea) on the preservation of raw gizzard-shad slice were investigated, morphological change of Vibrio parahaemolyticus treated with water-extract of mustard seed was examined, the results are as following. The pH of raw gizzard-shad slice soaked in water with mustard seed slightly increased during preservation, and the pH was in inverse proportion to the added amount of mustard seed. The number of bacteria and Vibrio of raw gizzard-shad slice treated with mustard seed were lower than control, and the higher the mustard seed concentration, the lower the number of bacteria and Vibrio. The TMA-N content of raw gizzard-shad slice gradually increased during preservation, and the TMA-N was in inverse proportion to the added amount of mustard seed. Scanning electron microscopy of Vibrio parahaemolyticus treated with water extract of mustard seed showed that surface membrane was destroyed with expended ellipsoidal shape.

BCD (Bipolar-CMOS-DMOS) Technology Trends for Power Management IC

Il-Yong Park,Yong-Keon Choi,Kwang-Young Ko,Sang-Chul Shim,Bon-Keun Jun,Nam-Chil Moon,Nam-Joo Kim,Kwang-Dong Yoo 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5

This paper reviews the technology trends of BCD (Bipolar-CMOS-DMOS) technology in terms of voltage capability, switching speed of power transistor, and high integration of logic CMOS for SoC (System-on-Chip) solution requiring high-voltage devices. Recent trends such like modularity of the process, power metal routing, and high-density NVM (Non-Volatile Memory) are also discussed.

만성 폐쇄성 폐질환 환자에서 뇌나트륨이뇨펩티드와 폐동맥압과의 상관관계에 관한 연구

황용일 ( Yong Il Hwang ),박근민 ( Geun Min Park ),권성연 ( Sung Youn Kwon ),윤호일 ( Ho Il Yoon ),이춘택 ( Choon Taek Lee ),한성구 ( Sung Koo Han ),심영수 ( Young Soo Shim ),이재호 ( Jae Ho Lee ) 대한결핵 및 호흡기학회 2007 Tuberculosis and Respiratory Diseases Vol.63 No.4

연구 배경: 폐동맥 고혈압은 만성 폐쇄성 폐질환 환자에서 중요한 심혈관계 합병증이다. 뇌나트륨이뇨펩티드는 허혈성 심질환과 심부전의 경우에서 진단적 효율성과 예후 예측인자로서의 효율성이 잘 알려져 있고 우심에 압력 과부하가 있는 상황에서도 증가된다. 뇌나트륨이뇨펩티드의 측정이 만성 폐쇄성 폐질환 환자에서 폐동맥 고혈압의 진단에 유용성이 있는지 알아보고자 폐동맥압과 뇌나트륨이뇨펩티드와의 상관관계를 분석하였다. 연구 방법: 의무 기록 분석을 통하여 뇌나트륨이뇨펩티드, 심초음파, 폐기능 검사를 모두 실시한 만성 폐쇄성 폐질환 환자들을 대상으로 연구를 수행하였다. 뇌나트륨이뇨펩티드(NT-proBNP), 폐동맥압(PAP), 1초간 노력성 폐활량(FEV1)과의 상관관계를 분석하였다. 결과: 총 31명의 환자가 분석에 포함되었으며 폐동맥 고혈압이 동반된 환자는 9명(26.7%)이었다. 폐동맥압과 뇌나트륨이뇨펩티드 사이에 유의한 상관관계가 관찰되었다(r=0.589, p=0.002). 결론: 뇌나트륨이뇨펩티드는 만성 폐쇄성 폐질환 환자들에서 동반된 폐동맥 고혈압의 진단에 사용될 수 있을 것으로 사료된다. Background: Pulmonary hypertension is one of the cardiovascular complications of in COPD. However, a diagnosis of pulmonary hypertension requires an invasive test, such as right heart catheterization. NT-proBNP is a cardiac hormone that is elevated when a cardiac volume or pressure overload is present. It was hypothesized that NT-proBNP might play a role in detecting of pulmonary hypertension in COPD patients. Method: The 31 COPD patients, who underwent all of NT-proBNP, echocardiography, and spirometry in Seoul National University Bundang Hospital during the period from November 2003 to July 2005, were retrospectively analyzed. Result: Of the 31 COPD patients, 9 patients had pulmonary hypertension. A significant positive correlation was observed between the NT-proBNP and pulmonary arterial pressure (r=0.589, p=0.002). However, there was no significant correlation observed between the FEV1 and NT-proBNP and FEV1 and pulmonary arterial pressure. Conclusion: NT-proBNP might indicate the presence of pulmonary hypertension in COPD patients. (Tuberc Respir Dis 2007; 63: 346-352)