Dimethylphthalate와 Monoethanolamine의 에스테르 交換反應에 關한 硏究

孫秉淸,鄭舜旭 弘益大學校 1983 弘大論叢 Vol.15 No.2

The transesterification reaction between dimethyphthalate and monoethanolamine was kinetically investigated in the presence of various metal acetate catalyst at 110℃. The reaction was followed by the measurement of distilled methanol from the micro measuring cylinder The transeterification reaction was first-order kinetics with respect to the concentration of dimethylphthalate, monoethanolamine and catalyst. From the examination of relationship between rate constant and reciprocal absolute temperature, the activation energy has been caculated as 9.843 Kcal with cadmium acetate catalyst, 12.30 Kcal without catalyst. The highest reactives were found for electronegativity values between 1.4~1.7.

친환경 방염액의 연구

이순홍,김병량,문명욱,이대정,정영호 안양대학교 산업기술연구소 2004 自然科學硏究 Vol.11 No.1

대구 지하철 참사 이후 사회 전반적으로 방염에 대한 관심이 증대되어 방염제에 대한 연구가 활발하게 진행되고 있는 실정이다. 기존의 할로겐화 방염제는 방염제 자체의 독성으로 인해 인간의 건강과 환경에 유해성이 확인됨에 따라 이를 대체할 친환경 방염제의 연구가 부각되고 있는 시점이다. 본 연구에서는 친환경 대체 방염제의 일환으로 인계와 무기계 방염제를 혼합 사용하여 우수한 방염성능 및 연소시 유독가스가 발생되지 않는 친환경 방염제의 조성을 설계하고자 하였다. 인계 방염제로서 제1인산암모늄, 제2인산암모늄을 사용하였으며, 무기계 방염제로서 붕산과 붕사를 사용하여 각 조성 배합비의 함량 변화 실험을 통한 방염 특성 평가를 수행하였다. 이와 더불어 방염제의 부착률에 따라서 방염효과가 달라지는데, 최적의 조성으로 부착률을 달리하여 경제성과 법적인 측면을 고려하여 가장 효율적인 부착률을 알아보았다. The purpose of this research is to make a non toxic flame retardants as a substitute material for toxic halogen type, and to evaluate burning area, adhesion rate and flammability of non toxic flame retardants. The non toxic flame retardants were prepared by mixing processes of ammonium phosphate monobasic, ammonium phosphate dibasic, boric acid and borax under the various preparation conditions. Flammability of polyester fabrics treated with these mixed flame retardants was investigated through measurement of burning area and adhesion rate. The burning area values were decreased with increase of the Ammonium phosphate monobasic and ammonium phosphate dibasic content of flame retardants. For economic and legal reasons, the optimum adhesion rate of flame retardants on the polyester fabrics was 50%.

1-Phenylindole Ester류의 합성과 반응성 연구

崔舜圭,金兪瑛,兪丙國,李龍均,鄭大一 東亞大學校附設基礎科學硏究所 1993 基礎科學硏究論文集 Vol.10 No.1

일반적인 dienophile에 대한 pyrrole의 반응은 pyrrole이 diene system으로 작용된 [4+2] 고리부가반응과 pyrrole의 α-탄소 위치에 부가되는 Michael형태의 반응이 알려져 있다.

영양상태 평가 방법에 대한 고찰

임병순 公州大學校 資源科學硏究所 1998 資源科學硏究論文集 Vol.6 No.-

Nutritional assessment is a series of process thought which we can make a diagnosis and analysis of the nutritional status of an individual or groups by connecting with various informations acquired through dietary method, biochimical method, anthropometric method and clinical method. Nutritional assessment is necessary for effective management of health and nutrition. In this study, I inquired of many methods to assess of nutritional status. 1. Dietary methods are necessary to get the kinds and amount of nutrients of food individual ingested. In this sorts of methods, thereare recall method, food frequency method, diet record method, dietary history and weighing method. 2. Biochemical method is the way to measure the content of nutrients in blood, urine, tissue. Static tests and functional tests are included in this method. 3. Anthropometric method is the way to measure the height, weight, wrist circumference, elbow breadth, etc,to get the degree of inferiority and evaluate nutritional status indirectly by measuring the rate of constitution of each part of body, skinfold thickness, waist-hip circumference ratio, mid-upper arm circumference, etc. 4. Clinlcal method evaluate nutritional status by objecting physical symptoms bring about change of nutritronal status of under nutrition or over nutrition.

저염김치제조에 관한 기초적 연구 : 무우의 소금절이 과정중 소금의 침투와 칼슘의 용출 Movement of salt and calcium in the processing of salting

김순동,박병윤,강명수 효성여자대학교 새마을연구소 1986 새마을硏究論文集 Vol.6 No.-

The relation between salt penetration and elution of moisture,calcium during salting process of radish were investigated at differentsalt concentration as a basic research for the fermentation of lowsalted radish kimchi. And also, measured to the most desirable saltconrentration of kimchis from houses and department stores by sensoryassessment. Almong 20 kimchis, 8 kinds were selected by sensory assessment andtheir salt concentration were at range of 1.2~2.2%. The result mayinvolve increasing in preference for low salted kimchis. Moisture audcalcium of radish were lossed in proportion to increasing the saltconcentration. Desirable salting times were estimated to 2 hours at3%, 1 hour at 5% and 30 minutes at 10% salt concentration. Thetreatment of high concentration of salt shortened the salting time,but brought a great nutritional loss.

Dimethylphthalate와 Ethyleneglycol의 에스테르 交換 反應에 關한 硏究(2)

孫秉淸,鄭舜旭 弘益大學校 1985 弘大論叢 Vol.17 No.2

The transesterification reaction between dimethylphthalate and ethyleneglycol was kinetically investigated in the presence of various metal chloride catalysts at 180℃. The reaction was followed by the measurement of distilled methanol from the micro measuring cylinder. The transesterification reaction was first-order kinetics with respect to the concentration of dimethylphthalate, ethyleneglycol and catalyst. From the examination of relationship between rate constant and reciprocal absolute temperature, the activation energy has been calculated as 22.62 Kcal with cupric chloride catalyst, 32.26 Kcal with zinc chloride catalyst.+the highest reactivities were found for electronegativity values between 1.4∼1.7.

돼지 췌장 유래 엘라스타제의 항원성 시험

김순회,백남기,안병옥,이상득,이순복,김원배,양중익 A.R. Liss 1990 ENVIRONMENTAL MUTAGENS AND CARCINOGENS Vol.10 No.2

Methylmethacrylate와 n-Butylalcohol의 에스테르 교환반응에 관한 연구

鄭舜旭,朴根浩,孫秉淸,金忠一 弘益大學校 1988 弘大論叢 Vol.20 No.2

The transesterification reaction between methylmethacrylate and n-butyl alcohol was kinetically investigated in the presence of constant quantity of inhibitor and various metal acetate catalyst at 120℃. The quantity of n-butylmethacrylate produced in the reaction flask was measured by gas-chromatography, and the reaction rate was investigated by measuring of the quantity of the product the reaction under various catalysts. The transesterification was carried out in the first order reaction kinetics with respect to the concentration of methylmethacrylate and n-buty1 alcohol, respectively. The linear relationship was show between rate constant and absolute temperatures, and the activation energy of 14.7Kcal for the reaction with zinc acetate catalyst was calculated. The maximum reaction rate was appeared at the range of 1.5 to 1.6 of electro-negativity of metal ions.

VDT작업자의 견관절 근육의 압통역치

신병순,박정일 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.1

This study was carried out for evaluating the usefullness of pressure pain threshold as an objective test on shoulder muscles in VDT workers. Subjective symptoms, frequency and intensity of pain complaint were investigated by questionnaire method and objective tests, trigger point and pressure pain threshold of 14 shoulder muscles of dominant and nondominant side each, were performed by physical examination and using pressure algometer on 44 VDT workers(more than 2hrs a day) and 20 controls. And worker status including work duration, daily work hours and continuous work hours per one time was also surveyed by questionnaire method. the relations among these items were analysed. Results were as follows; 1. The prevalences of shoulder pain in VDT workers and controls were 72.7% and 50.0%. The mean of pain frequency category scale was not significantly different between 2 groups, while the mean of pain intensity category scale in VDT workers was higher than that in controls. The trigger point in VDT workers showed the highest frequency in the upper trapezius muscle which followed by the levator scapular muscle. And pressure pain thresholds of VDT workers were significantly lower than those of controls in all 14 shoulder muscles. 2. In VDT workers, the category scales of pain frequency and intensity during last one week in shoulder pain complaint group at the time of investigation were significantly higher than those in non complaint group. And the pressure pain thresholds of nondominant levator scapular, bilateral lower trapezoids, nondominant posterior deltoid and nondominant pectoralis major muscles were significantly lower in complaint group. 3. The pressure pain thresholds of bilateral upper trapezius, levator scapular and lower trapezius muscles in VDT workers with trigger point at shoulder muscles were significantly lower than those in VDT workers without trigger point. 4. In terms of work duration, the pain frequency category scale during last one week of '5 years and more' group was significantly higher than that of 'less than 5 years' group, while pain intensity category scale and pressure pain threshold were showed no significant difference. 5. In terms of daily work hour, pressure pain thresholds of bilateral upper trapezius, nondominant levator scapular, dominant anterior deltoid, dominant posterior deltoid, dominant supraspinatus, and nondominant pectoralis major of '4 hours and more' group were significantly lower than those of 'less than 4 hours' group, while category scales of pain frequency and intensity during last one week were showed no significant difference. 6. In terms of continuous work hour, the frequency and intensity category scale was significantly higher and pressure pain thresholds of dominant upper trapezoids, bilateral levator scapular and dominant lower trapezius muscles were significantly lower in '2 hours and more' group than 'less than 2 hours' group. In conclusion, in order to evaluate more objectively the musculoskeletal impairment by VDT work, it is recommended that objective tests such as trigger point and pressure pain thresholds are performed in addition to survey of subjective symptoms. And also more consideration on daily work hour and continuous work hour than total work duration is required.

가열유와 Vitamin E 투여가 흰쥐의 혈청 GOT, GPT 및 Alkaline Phosphatase 활성에 미치는 영향

이순재,박미향,정병두 대구효성가톨릭대학교 응용과학연구소 1991 응용과학연구논문집 Vol.1 No.-

가열유 투여에 따른 흰쥐 간장 조직의 과산화적 손상에 대한 연구와 식이중 V-E의 수준에 따라 가열유로 인한 간장조직의 과산화적 손상에 대한 항산화적 방어현상을 관찰하기 위하여 열화된 가열유(산가 4.02, carbonyl value 27.9, peroxide value 52.7)를 하루 총열량의 10%을 그리고 dl-α-tocopheryl acetate의 양을 달리하여 (0, 40, 200mg/kg of diet : OH group, 40H group, 200 H group) tube feeding하면서 3, 6주간씩 사육하고 실험종료후 혈청을 얻어 GOT, GPT, alkaline phosphatase 활성변화를 관찰하였다. 1. 가열유를 투여한 식이군은 대조군에 비해 혈청 GOT, GPT, AL-pase 활성도가 높았다. 2. V-E가 결핍된 OH식이군이 대조군에 비해 GOT, GPT, ALP 활성이 가장 높았고, 40H, 200H순위로 V-E첨가 수준이 높을수록 비례하여 이를 효소활성이 감소하였다. 3. 가열유의 투여기간이 길어질수록 효소 활성이 전반적으로 상승되었다. In order to investigate the liver damage due to heated oil intake and the antioxidative effect of vitamin E on it, rats were fed for 3 and 6 weeks by intubating heated corn oil with acid value of 4.02 at the level of 10Ca% and three different levels of vitamin E : 0, 40 and 200 mg/kg diet. Control group was fed fresh corn oil and 40 mg/kg diet of vitamin E. After each feeding period, serum glutamic oxaloacetatic transaminase(GOT), glutamic pyruvic transaminase(GPT), and alkaline phosphatase(AL-pase) activities were measured. GOT, GPT and AL-pase activities were higher in heated oil groups than control group. As dietary vitamin E level was increased, GOT, GPT and AL-pase activities were decreased progressively. These phenomena were more remarkable in 6 weeks of feeding than 3 weeks.