高性能減水劑를 使用한 콘크리트의 强度性狀에 관한 基礎的 硏究

尹錫天,權寧璡,金武漢 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.1

This is the experiment on the strength properties of concrete used superplasticizing agents which are used to effect considerable reduction in water contents in the same level of workability. It is the aim of this study to analyze the correlation ¹ among strength properties after obtaining and investigating the mechanical properties such as compressive strength, tensile strength, dynamic modulus of elasticity, rebound number, and ultrasonic pulse velocity of hardened concrete used superplasticizing agents by statistical methods.

제지 폐수의 질소·인산 동시 제거를 위한 생물학적 처리기술 개발

권기석,노윤숙 안동대학교 환경연구소 2001 환경연구 Vol.1 No.-

주변에서 원유로 오염된 토양과 난분해성 화합물을 포함하고 있는 폐수 등에서 균주를 분리하여 40여종의 분해균주 중 가장 분해력이 우수한 분해균주 4종을 LB(Luria Bertani)배지로 최종분리하였다. 자연계의 균원 시료로부터 분리된 균주 중 점성을 갖는 균주를 선별하여 그 중 표준 점토광물인 kaolin clay에 대한 응집활성이 뛰어난 34종류이 균주를 선택하였으며, 폐수 내에서 응집활성이 높은 응집균주 4종을 최종 분리하였다. 균주 #46(Bacillus circulans), O24(Pseudomonas sp.)2종을 제외한 나머지 균주들의 동정결과는 #24T3, #24P3, #24B3는 Bacillus sp.로 동정되었고 #81, #152, 29은 미동정 되었다. 분해균주의 경우 TOC가 84%, T-N이 98%, T-P가 68%의 처리효율을 보였다. 응집균주의 경우 TOC가 80%, T-N 98%, T-P가 71%의 처리효율을 보였다. 분해+응집균주가 microcosom을 형성한 경우 TOC가 85%, T-N의 경우 98%이상, T-P의 경우 70%을 동시에 처리할 수 있다. From the enrichment culture, 40 strains were isolated, Among them, four strains were screend as having significant biodegradation activity of crude oil and toxic compounds containing wastewater. Also, for the screening of the microorganims, 34 bacterial strains were selected. Among them, four strains were screened as producing the most excellent flocculating material. The strains were identified that 46 was Bacillus circulates, 024 was Pseudomonas sp., 24T3, 24B3, 24P3 were identified Bacillus sp., respectively, And 81, 151, 29 were non-identification. The optimum cultural conditions were as follows; Bioflocculant producing strains : Glucose 20.0g, NH_(4)NO_(3) 2.0g, K_(2)HPO_(4) 0.8g, KH_(2)PO_(4) 0.6g, MgSO_(4)·7H_(2)O 0.05g, MnSO_(4)·4H_(2)O 0.05g, Soytone 0.lg, Tryptone 0.lg Yeast extract 0.lg, CaCO_(3) 0.3g in 1 liter of distilled water, 30℃ for temperature and pH 7.0. Biodegrade strains : LB(Luria Bertani) medium, 30℃ for temperature and pH 6.8∼7.5. The removal rates of total nitrogen and total phosphate by bioflocculant producing strains against pulp wastewater were T-N 98% and T-P 71%, respectively. In the case of biodegrade strains shown that the removal rates were T-N 98% and T-P 68%, respectively. In the case of mixed biodegrade strains and bioflocculant producing strains shown that the removal rates were T-N 99% and T-P 76%, respectively. The strains will be apply simultaneously T-N 98% and T-P 70% from pulp waserwater.

대구시 모 보건소에 내소한 성병환자에 대한 연구

윤능기,서석권 啓明大學校 醫科大學 1988 계명의대학술지 Vol.7 No.2

The authors selected the medical records of the 2,346 diagnosed urethritis and syphilis patients from those who visited to a public health center in Taegue City, 1, January 1985 to 31, December 1987 to treat their urologic symptoms. Their medical records were used to investigate distribution status of the infection by demorgaphic and temporal variables. The results were as follows: 1. The most frequent age group was 20-29 years of age, 65.6%, and the less than 20 years of age group was 10.2%. In 30-39 age group, males 17.9% and females 23.0% and in 40-49 group, males 4.5% and females 12.2%. The female excess prevalence remained the same after that age group. 2. The order of relative frequency of the infection by month in which 3-year cases were combined was August, 11.3%, July 10.9%, January, 10.3% and the monthly distribution of the student was August, 16.0%, January, 11.6%, March, 10.7%, which suggests a coincidence with the periods of the school vacations. The seasonal distribution was summer 31.2%, spring 25.5%, autumn 21.7%, winter 21.5%. 3. The relative frequency of infection by martial status showed the unmarried was 70.3% and the married 29.37%, which was a significant difference. 4. The distribution by occupation was merchants 25.5%, office workers 19.2% and students 15.5% which was unexpectedly high. 5. In the distribution by source of infection of the males, friends was the most frequent source with 28.7%, restaurant employees 25.2%, prostitutes 16.8%, prostitutes 16.8%, and employees of lodging service 12.4%. 6. In the distribution by age and source of infection, friends were the most frequent source of infection(63.1%) in the less than 20 years of age group. In 20-29 years of age group, friends were 28.6%, restaurant employees 24.5%, prostitutes 17.8%, where showed increasing proportions of employees of the service trade. In 30-39 years of age group, restaurants employees 35.9%, employees of the lodging service 15.9%, prostitutes 14.9%, which means that most of sources of infection were employees of the service trade. In 4.-49 years of age group, restaurant employees 39.7%, prostitutes 17.2% and in 50-59 group, spouse was the most frequent(27.3%) and in the more than 60 years of age group prostitutes was 50%, but the total cases of that age group were too small to tabulate meaningfully. 7. The relative frequency of infection by infection history showed the inexperienced ws 48.4% and the experienced 51.6% and in the inexperienced, males 47.9% and females 78.1%.

들깨 脂質 成分에 關한 硏究

尹錫權 同德女子大學校 1990 同大論叢 Vol.20 No.1

To appreciate the physico-chemical properties of perilla oil, free and bound lipids in the whole seed and cotyledon were fractionated into neutral lipid, glycolipid and phospholipid by silicic acid column chromatography. Constituents and fatty acid compositions of each fraction were determined by thin layer chromatography and gas liquid chromatography. Total lipid contents of the whole seed and cotyledon were estimated to be 45.65% and 52.78% respectively. More than 99% of the total lipid was present as free lipid. The free lipid from the whole seed was analyzed to contain 87.6% of neutral lipid, 8.3% of glycolipid and 4.1% of phosphoipid, while the bound lipid to contain 45.2% of neutral lipid, 25.7% of glycolipid and 29.1% of phospholipid. In case of cotyledon, the weight percentages of the constituent lipids showed similar sterol, triglyceride, diglyceride, free sterol, monoglyceride and free fatty acid. Among them triglyceride comprised approximately 85 percent. The free glycolipid in the whole seed was composed of 3 components while the bound glycolipid 4 components. And the free phospholipid in the whole seed was consisted of 3, while the bound lipid 6 components. On the other hand, both the free and bound lipids from cotyledon were composed of 4 components. Linolenic acid contents of the free and bound lipids from the whole seed were 58.3% and 50.2% respectively, and the other fatty acids were in order of oleic, linoleic, palmitic and stearic acid. The linolenic acid in neutral lipid, glycolipid and phospholipid from the free lipid of whole seed observed to contain 62.0%, 50.9% and 40.0% respectively. The ratios of unsaturated to saturated fatty acids of these lipids were estimated to be 14.4, 5.8, 3.9 respectively.

들기름의 酸敗抑制에 關한 硏究 : 1. 들깨의 온도처리 및 들깨박의 ethanol 추출물이 들기름의 산패에 미치는 영향 1.Effects of Heat Treatments of Perilla Seed and Incorporation of Ethanol Extracts of Defatted Perilla Seed Flour on Rancidity of Perilla Seed Oil

윤석권,최수임 同德女子大學校 1986 同大論叢 Vol.16 No.1

To investigate the rancidity of heat treated perilla seed oil, whole perilla seed and cotyledon(without seed coat) were treated at 40℃, 80℃, 120℃, 160℃ and 200℃ for twenty minutes. The oils which extracted immediately after heat treatment and perilla seed homogenate were incubated at 45℃ and then rancidity of oil was determined intermittently by several measurements, Ethanol extracts of heat treated and defatted perilla flours were incorporated with perilla oil and the rancidity of oil was also measured. The results obtained were summarized as follows: 1. The peroxide value and color of perilla oil did not show much difference among heat treatment during incubation. But the rancidity of oil treated at 120℃ was found to be relatively low at the beginning of incubation compared with other heat treatments and that of oil from whole perilla seed was slightly lower than from cotyledon. 2. Peroxide value and color were changed linearly during incubation, therefore the changes of then could be expressed as linear regression equation. 3. In perilla seed homogenate, oil treated below 120℃ was not almost autoxidized until 41 days after incubation at 45℃. But oil in perilla seed homogenate treated over 160℃ was autoxidized more than oil extracted immediately after heat treatment. 4. When ethanol extracts from defatted perilla flours were incorporated withperilla oil, oil was not oxidized until 28 days after incubationb whatever the seed was treated at any temperature. Therefore it was assumed that there were unknown antioxidants in perilla defatted meal.

금호강 저질(sediment)중에 함유된 중금속의 분포와 오염원과의 상관성 검토

윤능기,이충원,서석권 啓明大學校 醫科大學 1988 계명의대학술지 Vol.7 No.2

The sieved sampling of the sediments of the Kumho river was carried out along 5 minor tribrtaries to study the distribution of the heavy metals according to particle size and to locate the source of heavy metals contributing to the pollution of the Kumho river which flows through the Taegu city April in 1988. The results were as follows; The heavy metal concentrations generally increased with the decreasing size of sediments and were higher in lower portion of sediment than in upper one at the same particle size. The coefficients of variation of each heavy metal in the same particle size were similar generally, but those among heavy metals showed markedly different values. It was found that the main source of pollution of the Kumho river was the Third Industrial Complex, but the contribution of Palge should no be underestimated.

工業敎育大學의 實驗實習施設 共同活用 및 運營에 關한 硏究

尹錫天,牟相榮,權五憲,千炳善,周赫鍾,李永臣,金健中,羅聲雄,洪錫雨,吳德成,盧泰天 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)

The College of Engineering was specialized to have a sole function for supplying technical high school teachers in 1977 and referred to as the College of Industrial Education according to the Government's policy. The economic impact mainly due to the oil-crises caused a severe problem to this college, namely discrepancy of supply to demand scale. Accordingly the number of student enrollment was to be fluctuated from 479 in 1979 through 800 in 1979 and 900 in 1980 to 430 in 1981. And the engineering departments have been attached to this Engineering Education College since 1981. These circumstanses met singnificant inefficiency in facility operation. This program aims at providing an overall relocation of the college facilities and preparing the practical system to make the joint-operation possible taking into account circulation, academic stream, budget, maintenance, etc. However this study could not get optimal spacing but some trade-off, considering the current situation.

당류 첨가가 김치 성분 및 관능검사에 미치는 영향

권동진,장영상,조길석,강윤한 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.6

김치의 단맛을 내기 위하여 일반 제조에 이용되고있는 sucros 대신 xtevioside나 sorbitol과 같이 당의 종류를 달리하여 제조한 김치의 이화학적 성분, 미생물의 변화 및 관능적 특성에 미치는 영향을 조사하였다. pH와 적정산도는 stevioside와 sorbitol이 첨가된 처리구가 sucrose가 첨가된 처리구보다 산의 생성 억제 효과가 있는 것으로 나타났다. 총균수의 경우 전반적으로 당의 종류와 저장온도와는 관계없이 미생물의 생육 억제효과가 없는 것으로 나타났으나 젖산균의 경우 10℃에서는 균의 생육 억제 효과는 없는 반면 5℃에 저장한 김치의 경우 stevioside와 sorbitol이첨가된 김치는 젖산균의 생육에 억제효과가 있는 것으로 나타났다. 관능검사를 실시한 결과 stevioside 첨가된 김치 sucrose 첨가구에 비하여 기호도에서는전적으로 우수한 것으로 나타났다. Effects of sugars addition in Kimchi preparation on physiochemical characteristics, sensory evaluation of Kimchi were investigated. Sugar sources added were sucrose, stevioside and sorbitol. Changes of pH and titratable acidity in Kimchi with addition of stevioside or sorbitol were similar to ones of control Kimchi with addition of sucrose during storage at 10℃, while ones of Kimchi with addition of stevioside or sorbitol were different from control during storage at 5℃, Comparison with control Kinich, addition of stevioside or sorbitol was inhibited acid production in Kimchi during storage at 5℃. Total number of viable cells were not significantly different among those of Kimchi samples during storage at 5 and l0℃ The number of lactic acid bacteria were not significantly different among those of Kimchi samples during storage at 10℃, but ones of Kimchi with addition of stevioside or sorbitol were less than those of Kimchi with addition of sucrose during storage at 5℃. Among sweetness, taste, flavor, color, texture and overall acceptability, the results of sensory evaluation except sweetness were showed that Kimchi added with stevioside or sorbitol was superior to ones added with sucrose.

汚染 鍾類別에 對한 洗劑의 洗濯性 考察

南潤子,權明淑 慶熙大學校 1994 論文集 Vol.23 No.-

The purpose of this study is to analyze the dry-cleaning synthetic detergent for home use sold in Korea and to investigate the release of various stain by repeated washing cycles. The materials used for this investigation were five kinds of dry cleaning syn-det for home use commercially available in market. The fabrics used were two kinds of fabrics (Silk: Beige, Red, Blue/Wool : Beige, Black, Navy) The stains used were ketchup, oil, coffee mixed with creamer and mayonnaise. The results of this study indicate as follows 1. Surfactant contents were 25%-47% and the Korean dry cleaning syn-det for home use had more surfactant content than foreign ones. 2. The five kinds of dry cleaning syn-det for home using and water were superior to petroleum detergent in stain release rate for ketchup. 3. The five kinds of dry cleaning syn-det for home use, water and petroleum detergent had no difference in stain release rate for mayonnaise. 4. Petroleum detergent was superior to five kind of dry cleaning syn-det for home using and water in oil release. 5. The five kinds of dry cleaning syn-det for home using and water was superior to petroleum detergent in the stain release rate for coffee mixed with creamer.

관동맥질환에서 각종 지질 및 지단백의 변화

황석순,김권배,손수인,서영숙,김기식,김윤년 啓明大學校 醫科大學 1990 계명의대학술지 Vol.9 No.3

To evaluate the relationship between coronary artery disease(CAD) and the various levels of lipid and lipoproteins, we performed coronary angiography to the patient, who were suspected coronary artery disease from January 1988 to August 1989. And compared it with normal control group. The number of control group were 41(21 men, 20 women), and the patient group were 52(42 men, 10 women). The age was not differ between two groups. The results were as follows; 1. In CAD group, the plasma concentration of total lipid, triglyceride, total cholesterol, phosphlipid, and TC/HDL ratio were significantly higher than in control group. But, though, the concentration of HDL was lower in CAD group, had no significant difference between two groups. 2. The severity of CAD were well correlated with total lipid, cholesterol, LDL, trigylceride, phospholipid, TC/HDL, LDL/HDL levels. HDL level didnt's show significant correlation with the degree of CAD. We concluded that total lipid, cholesterol, trigylceride TC/LDL ratio were valuable markers of CAD in Korean, but futhur studies of lipoproteiins and other risk factors in the large population will be recommended.