鹽基性 黃酸第二鐵의 合成과 組成分析 및 淨水能力과P.A.A.첨과효과에 關한 硏究

李甲得 慶北專門大學 (영주경상전문대학) 1981 慶北專門大學 論文集 Vol.3 No.-

In order to curtail the additional use of alkali, an auxiliary agent of water-purifying reagent in the iron series, an adequate basic sulfate synthesis and an analysis of component elements in the formative materials in accordance with the synthetic formulations were givn.The resulted study of the influencing power from under various conditions the synthesized water-purifying reagent revealed as follows: 1. Manufactured No. 1 is highly basic, but because of easy occurrence of hydrolysis it is of little practical use. 2. Considering the additive quantity of water-purifying reagent and remaing turbid degree of lime water, it show that manufactured No.2 is the best for manufactured goods. 3. In general, pH-8 are easy to cause floe formations, and in view of lower degree of the remaining turbid it is effective for the weak acidic waster-water treatment. 4. Although salt does not have sufficient effect on the water-purifying reagent, the remaining turbid degree tends to increase in accordance with the additive amount. 5. In the series of experiments the addition of P.A.A increasingly takes effect on water purification.

단일전극을 가진 마이크로 가스센서의 제작 및 특성

송갑득,박영일,이상문,이윤수,최낙진,주병수,서무교,허증수,이덕동 한국센서학회 2002 센서학회지 Vol.11 No.6

센서의 안정도와 감도를 개선시킬 수 있는 단일전극을 가진 열선형 마이크로 가스센서를 제작하였다. 일반적으로, 금속산화물 반도체를 이용한 가스센서는 히터전극과 감지전극의 두 개의 전극을 가지고 있다. 제작된 센서는 히터전극위에 감지물질을 형성하여 단일 전극을 가지는 구조를 가지고 있다. 히터와 감지전극으로 사용되는 Pt는 glass 기판위에 스퍼터링법으로 형성하였으며, SnO_2 감지물질은 제작된 Pt 전극위에 열증착시켜 형성하였다. SnO_2막은 lift-off 공정을 이용해서 패턴을 형성하고 1시간 동안 산소분위기에서 열산화하였다. 제작된 소자의 크기는 1.92x.1 mm^2 이다. CO 가스에 대한 감지특성을 조사한 결과 1,000 ppm에 대해 100 mV의 출력변화를 나타내었으며, 넓은 농도범위(0 ~ 10,000 ppm에서 선형적인 전압출력을 나타내었다. 또한 가스 반응 전과 반응 후의 전압출력을 비교해 볼 때, 1 % 이내의 편차를 나타내는 우수한 회복성을 나타내었다. Micro gas sensor with single electrode was proposed for improving stability and sensitivity, Generally, metal oxide gas sensors have two electrodes for heating and sensing. This fabricated new type sensor have only a single electrode by forming a sensing material onto heating electrode. Pt as a heating and sensing electrode was sputtered on glass and a SnO_2 sensing material was thermally evaporated on Pt electrode. SnO_2 was patterned by lift-off process and then thermally oxidized in O_2 condition for 1 hr., 600 ℃. The size fabricated sensor was 1.9 x 2.1 mm^2. As a result of CO gas sensing characteristics, this sensor showed 100 mV change for 1,000 ppm and linearlity for wide range(0 ~ 10,000 ppm) of gas concentrations. And the sensor shows a good recovery characteristics of 1 % deviation compared to initial resistance.

리티움 이온 고체전해질 CO₂센서

송갑득,서무교,곽종식,이덕동 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

Carbon dioxide gas sensor, which has inner heater, is fabricated using Li ionic electrolyte as raw material which is systhesized by sol-gel method. It has either Au electrode or Pt electrode as the metal electrode of sensing electrode part. Sensing characteristics for carbon dioxide gas and interference effect for carbon monoxide gas and hydro carbon gases are investigated. The sensors using Au electrode and Pt electrode show sensitivity about 25 mV/decade and 26 mV/decade for the variation of carbon dioxide gas concentration, respectively. The sensor using Au electrode shows more exellent selectivity compared to that using Pt electrode for carbon monoxide gas and hydro carbon gases.

염기성황산알루미늄의 製造및 鹽類添加에 따른 淨水能力에 關한 硏究

李甲得,徐春善 慶北專門大學 (영주경상전문대학) 1979 慶北專門大學 論文集 Vol.2 No.-

As I made use of S.A.S and middle quality calium carbonate derived from limestone buried very abundantly in korea, I produced basic aluminum sulfate and studies its ability to clean water and saline effect exerting influnceon it. The result is as follows: 1) B.A.S is less covenient than S.A.S, V.A.S, P.A.C because even the B. A. S liquid under 6 percentage as Alummium oxide should be used as an original liquid for the reason that the water mixed with the B.A.S makes the hydrolysis. 2) On the salimity percentage in each products, the difference between arithmatical estimete and experimental estimate is high in A and B products, and law in D and E respectively, It is caused by hydrolysis, and much concerned with the safety of products. 3) In the use of B.A.S as a cleanwater reagent, general water and waste can be cleaned by direct application of B.A.S without control of PH because of its wide varity of application. 4) Sodium Sulfate is efficient for saline because of its mixing effect with saline. 5) The adding volume of B.A.S is descend when applied to cleaning of water with high turbid degree of remaing, thus B.A.S is efficient cleanwater reagent for water high turbid degree of remaining. 6) Adding volume of our products B.A.S and Lime to water with law turbid degree of remaining are 200ppm and 50ppm respectively; adding volume of Lime is a quarter of that of B.A.S.

野生鳥獸의 分布와 捿息密度 및 食性에 關한 硏究 -第2報-

金甲德,禹漢貞,金泰旭 서울大學校 農科大學 1980 서울대농학연구지 Vol.5 No.1

1. Birds and Mammals census by line transect (Roadside census) and food plants for birds (plants birds like the most) was made at Mt. Baek Woon, No.4 No.5 No.6 and at Mt. Chi Ak, during 18 April 1978 to 11 February 1979. 2. The number per hour and percent dominance (for the total of all species) were calculated as indices for relative abundance of each species, (Table: 4,5,6,7). 3. Distance (per Km), width (per ha.), time (per hour) and relative abundance for each species in four census areas were observed. 4. 49 species of bird recorded, Great Tit, Parus major, Brandt's Jay, Garrulus glandarius, Crow Tit, Paradoxornis webbiana, Meadow Bunting, Emberiza cioides(resident) and Naumann's Thrush, Turdus naumanni, Brambling, Fringilla montifringilla, Rustic Bunting, Emberiza rustica(winter bird) were recorded as dominant species Mt.Baek Woon. Great Tit, Parus major, Blue Magpie, Cyanopica cyane, and Crow Tit, Paradoxornis webbiana were recorded as dominant species at Mt. ChiAK. 5. Blue Magpie, Cyanopica cyane is breeding at Mt. ChiAK but at Mt. Baek Woon it was not yet observed. 6. Korean Magpie, Pica pica is no distributed four census areas. 7. Mammalian fauna in four census area is relatively low and Korean Red Fox, Vulpes vulpes Chinese Wolf, Canis lupus and Siberian Leopard, Panthera pardus had exterminated since Korean War Table: 3) 8. A few number of Korean Flying Squirrel, Petaurista leucogenys hintoni is breeding at Mt. ChiAK.

리튬 이온 전도체를 이용한 히터가 내장된 CO₂센서

채유석,송갑득,강봉휘,서무교,이덕동 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1

The simple solid electrolyte carbon dioxide sensor was fabricated using Li ionic conductor with a heater and Li_(2)CO_(3)+Na_(2)CO_(3)+K_(2)CO_(3) (47.6 : 25.4 : 27.0) as a metal carbonate auxiliary phase. The electromotive force(EMF) was in excellent agreement with the EMF value calculated from the Nernst' s equation for CO_(2) gas concentration from 950 to 9,950ppm at 420℃, with the response time of 15~25 sec.. Water vapor hardly affected the sensor characteristics for relative humidity from 40% to 90%, in contrast to the case of the Li_(2)CO_(3) and Na_(2)CO_(3) + BaCO_(3)(1 : 1.7). The CO_(2) sensitivity of this sensor was stable for the test period of 240 hours.

고체전해질형 CO₂가스 감지 소자의 제작 및 그 동작 특성

서무교,송갑득,곽종식,이덕동 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1

The raw material of solid electrolyte type CO_(2) sensor was synthesized using tetraethoxysilane, lithium methoxide, zirconium n-propoxide, and tributyle phosphate as precursors, this process was carried out at 60℃ in N_(2) ambience. The prepared material was dried and crushed into powder, and it was pressed into disk type samples. These samples were sintered at 9000 -1100℃ for 50 hours. The physical characteristics of the samples were investigated by TG/DTA, SEM and XRD. The solid electrolyte type CO_(2) sensor was fabricated and its operational characteristics were measured. The sensing characteristics of the sensor shows about 86 mV/decade for the variation of CO_(2) concentration.

정제들깨기름의 산화안정성에 미치는 α-tocopherol 및 BHT 의 효과

천성호,이갑득 동국대학교 경주대학 1994 東國論集 Vol.13 No.-

The antioxidactive effects of the α-tocopherols and butylated hydroxytoluenes(BHT) on refined perilla oil were investigated by oven test. The antioxidative effects of the α-tocopherols added to the refined perilla oil were increased with low concentration of α-tocopherols but decreased with high concentration of α-tocopherols. The 150-250ppm of α-tocopherols had the greatest antioxidative effect. The antioxidative effects of the butylated hydroxytoluenes(BHT) added the refined perilla oil were increased with increasing the concentration of butylated hydroxytoluenes(BHT). The 1000ppm of butylated hydroxytoluene had the greatest antioxidative effect. The temperature effects for preservation of refined perilla oil were greater than the antioxidative effects. Among the temperature effects,the peroxide values of 10℃ were lower than 40℃ and 60℃. Refined perilla oil containing 1000ppm of BHT preserved at 10℃ was the lowest POV by oven test.

Lipase를 이용한 (S)-3-acetoxy-2-methylpropanol의 제조

서영배,서연찬,이갑득 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2

Captopril, α-tocopherol, erythromycin A, muscone과 같은 의약품, 향료등 생리활성물질의 합성에 있어서 유용한 중간원료로 이용되는 광학활성인 D-(-)-β-hydroxyisobutyric acid를 제조하기 위하여 그 전구체로 (S)-3-acyloxy-2-methylpropanol을 선정하여 lipase의 부제가수분해반응을 이용하여 이의 개발을 시도하였다. 대칭성 기질 2-methyl-1,3-propanediol diacetate 2를 다양한 lipase를 사용하여 부제가수분해(asymmetric hydrolysis)시킨 결과 lipase PS(Amano 제약, Pseudomonas sp.)의 경우는 phosphate buffer pH 7.0 조건하에서 광학순도(optical purity) 95% e.e.의 (R)-(-)-3-acetoxy-2-methylpropanol을 80% 수율로 생산하였으며, lipase AY(Candida rugosa)의 경우는 phosphate buffer pH 6.5/isobutyl alcohol (1/1), O℃의 조건하에서 목적으로 한 (S)-3-acetoxy-2-methylpropanol 3을 광학순도 약 60% e.e.로 생산하였다. Optically active carboxylic acid, D-(-)-β-hydroxyisobutyric acid {(D)-(-)-HIBA} is a useful chiral starting material for the preparation of enantiomerically pure bioactive compounds which have a chiral methyl carbon center in the molecule such as captopril, α-tocopherol, erythromycin A, muscone and so on. (S)-3-Acetoxy-2-mthylpropanol can be used as the precursor of (D)-(-)-HIBA, that is, chemical oxidation of the hydroxyl group and subsequent hydrolysis of acyl group in (S)-3-acetoxy-2-methylpropanol affords D-(-)-β-hydroxyisobutyric acid. (S)-3-acetoxy-2-methylpropanol was prepared by lipase-catalyzed asymmetric hydrolysis. In the enzymatic hydrolysis system, lipase AY (Candida rugosa) provided the expected (S)-3-acetoxy-2-methylpropanol in 60% e.e. of the enantiomeric purity under the phosphate buffer and organic co-solvent system.

유기용제 취급근로자들의 요중대사물질과 말초임파구 자매염색분체교환 발현빈도에 관한 조사연구

김돈균,황인경,류철인,이수일,정갑열,이용환,이충렬,현원일,김석봉,전용덕 大韓産業醫學會 1990 대한직업환경의학회지 Vol.2 No.1

저자들은 유기용제 취급여성근로자 90명을 대상으로 1988년 7월부터 1989년 8월까지 말초혈액임파구에서의 자매염색분체교환의 발현빈도를 조사하고 이들의 업종, 근속연수, 요중마뇨산 농도등이 자매염색분체교환의 발현빈도에 미치는 영향을 조사하였으며 그 결과를 요약하면 다음과 같다. 1. 유기용제 취급근로자들의 말초혈액임파구에서의 자매염색분체교환의 발현빈도는 대조군에 비하여 유의하게 증가되었다. 2. 말초혈액임파구에서의 자매염색분체교환의 발현빈도가 가장 높은 업종은 프라스틱제품 제조업이었다. 3. 근속연수가 말초혈액임파구에서의 자매염색분체교환의 발현빈도에 미치는 영향은 현저하지 않았다. 4. 요중마뇨산농도와 말초혈액임파구에서의 자매염색분체교환의 발현빈도간에는 유의한 상관관계가 있었다. In order to know the possibility of utilizing the sister chromatid exchanges as an index which could evaluate the effect of organic solvents on the health in industrial workers, the authors studied the effects of the inductivity of sister chromatid exchanges in peripheral lymphocytes from 90 female workers expoxed to organic solvents and 20 non-exposed female workers. The results obtained were as follows : 1. The frequency of sister chromatid exchanges in peripheral lymphocytes from 90 female workers exposed to organic solvents was significantly increased in comparison with 20 control subject. 2. The frequency of sister chromatid exchanges was significantly increased in the workers who were employed in the manufacture of plastic materials than the other manufactures. 3. There were no significant differences in the frequency of sister chromatid exchanges by carriers of the exposed workers.