혈중 및 호기 일산화탄소를 이용한 일산화탄소 헤모글로빈 농도간의 관련성 연구

김형수,박태혁,손지언,정갑열,김정만,김준연 동아대학교 2001 大學院論文集 Vol.26 No.-

This study was conducted to find a correlation between blood COHb and calculated COHb with expiratory air and related variables such as occupational and smoking factors. Author selected 69 healthy workers in 8 workplaces suspected CO exposure. Basic informations were collected by self-reported questionnaire and medical history taking. Author measured Indirect COHb concentration with expiratory air using Micro II-Smokerlyzer and blood COHb concentration using Oxymeter. The results of the study were summarized as follows : 1. In the smoker, mean blood COHb and calculated COHb with expiratory air were 2.21±0.98% and 2.27±0.97 %, and there was not a statistically significant difference. In the non-smoker, mean blood COHb and calculated COHb with expiratory air were 0.42±0.43 % and 0,65±0.30 %, and there was also not a statistically significant difference. 2. There were positive correlations between blood COHb and calculated COHb with expiratory air in both the smoker (r=0.91, p=0.0001) and non-smoker (r=0.73, p=0.0001). 3. In the smoker, the factors affected COHb were total smoking index (Pack × years) and passed time after the last smoking. 4. In the nonsmoker, the parking and driving groups had higher COHb concentration than others (p<0.05). In conclusion, there was no significant difference between indirect COHb concentration with expiratory air using Smokerlyzer and blood COHb concentration and there was a highly significant correlation between indirect and blood COHb concentrations. Therefore indirect COHb concentration with expiratory air is a useful screening method for CO exposure. Author suggest the resection of smoking during at least 90 minutes before measuring COHb concentration in order to exclude smoking effects.

흡착에 의한 식염폐수의 처리

박영태,도갑수 慶北工業專門大學 1980 論文集 Vol.18 No.-

식품공장에서 배출되는식염폐수는 주로 채소를 소금물에 절이는 과정에서 생겨나며, 이 폐수는 생물학적으로 분해 불가능한 염과 유기고체의 혼합물로 되어 있으므로 응접 및 생물학적 처리만으로는 좋은 결과를 얻을 수 없다. 또한 소금의 농도가 10% 이상을 유지하므로 이 소금을 재생시키는 것이 바람직하다. 본 연구는 식염폐수를 공장에서 직접 채취하여 모래 층에서 여과한후 흡착질용액으로 하고 흡착제로 zeolite와 입상활성탄을 사용하여 회분흡착실험을 통하여 흡착평형과 흡착능 및 식염폐수의 재상용 능성을 조사하였다. 평형에서의 흡착량은 입상활성탄이 6.1㎎/g adsorbent, zeolite가 5.5㎎/g adsorbent가 되었다. 실제 공장에서 쓰여질 흡착탑의 설계를 위하여 fixed bed에서 연속실험을 했으며 유량과 폐수의 초기농도 및 흡착제 종류에 따른 break through curve 를 얻어 설계를 위한 제반인자를 설정하고 흡착 process를 제안하였다. 제안한 process의 고정투자비를 각 흡착제별로 계산하고 경제적인 타당성을 고찰한 결과 폐수의 량을 20㎥/day로 가정했을때 고정투자비 기준으로 약 0.12원/liter SPB 이 되어서 경제성이 있음을 알았다. A continuous process ofr recovery of spent pickle brine(SPB) by preliminary filteration on a sand bed to remove suspended solids, followed by adsorption treatment in an granular activated carbon and zeolite-sand micture column to remove colour and odor causing organic compounds is investigate. Batch isotherm adsorption experiments revealed that the adsorption capacity of the SPV-adsorbent system is respectively 6.1㎎ total organic carbon per gram granular activated carbon and 5.5㎎ total organic carbon per gram zeolite a t25℃. It is estimated that a low capital investment of 0.12 won per liter of recycled treated SPB is required for a 20㎥/day capacity. This cost is much lower than that of fresh salt, and thus will be defrayed by savings on recycled salt.

농산물 소독과정에서 브롬화메틸에 노출된 근로자에게 발생한 신경병 2례

박태혁,김정일,손지언,김종국,김형수,정갑열,김준연 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.4

목적 : 농산물 소독과정에서 브롬화메틸에 노출된 근로자에게 발생한 신경병 2례 보고. 방법 : 피로감, 전신무력감, 어지럼증, 보행장애 등의 증상을 주소로 내원한 브롬화메틸을 사용하여 방역작업에 종사하는 건강한 20세와 18세의 근로자를 대상으로 혈액검사, 신경정도 및 근전도검사, 뇌자기공명영상 등의 임상검사와 작업력조사를 시행하였다. 결과 : 1례에서 뇌자기공명영상에서 연수와 소뇌의 양측 측충부의 고신호강도가 관찰되었고 11일 후의 추적조사에서 동일 부위의 고신호강토가 감소된 소견이 관찰되었으며 뇌병증으로 최종 진단되었다. 다른 1례는 신경전도검사에서 다발성 신경병 소견과 뇌유발전위검사에서 우측 하부 뇌간부위 병소가 관찰되었고 뇌병증 및 말초신경 병으로 최종 진단되었다. 결론 : 근로자들의 증상은 소독과정에서 브롬화메틸 노출로 인한 신경 병으로 판단되며 훈증소독과방역작업에 종사하는 근로자들의 실태조사와 안전에 대한 대책이 시급하다고 하겠다. Objectives : To report two cases of neuropathy due to methyl bromide intoxication. Methods : Workers, engaged in the fumigating process, complained fatigue, general weakness, ataxia, and hypersomnia. We evaluated them with blood tests, neurophysiologic studies and MRI and investigated their occupational history. Results : Increased signal intensities were found in the medulla oblongata and paraver mian of cerebellum in MRI and after 11 days, high signal intensities were reduced in the following MRI. In the other case, polyneuropathy and rlght lower brainstem lesion were observed In the NCV and BAEP studies. Conclusions : We confirmed that worker's symptoms were related to methyl bromide exposure in the fumigation. It is necessary that we should evaluate present condition of fumigating process and prepare appropriate methods to protect workers engaged in the fumigation.

CROSS 공법을 이용한 폐수의 생물학적 처리에 관한 연구

박광하,심재도,권영두,강동수,김인호,정태명,황갑성 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study aims to develop using a continuous removal of organic and settling solid(CROSS) to increase the efficiency of aeration system for wastewater treatment. To solve many problems of the conventional activated-sludge process, authors suggested a new CROSS model in conjunction with aeration systems in 1996. This system is characterized by utilizing an intensive aeration pipe with inlets at the lower portion and outlets at the higher portion in an aeration tank. Through the experiments on CROSS process, the average removal efficiences of BOD, COD_(Mn), SS, T-N and T-P were showed 98.8%, 93.9%, 98.0%, 71.3% and 49.8%. The average DO (Dissolved-Oxygen) concentration was constantly maintained at 8.0 mg/L by the intensive aeration which was accompanied by rapid reduction of BOD. Degradation of the organic matters in sewage then continued for the whole aeration period. The process demonstrated that it was very adaptive without seeding and returning the sludge. Compared to the activated sludge system, the system was very flexible for the continuous flow treatment. This preliminary assessment showed that the porous media in CROSS reactor is viable for the sewage treatment, since the porous media under the intensive aeration achieves acceptable effluent quality.

국산 Zeolite에 의한 염색폐수 처리에 관한 연구

박영태,도갑수 慶北工業專門大學 1979 論文集 Vol.16 No.-

The adsorption of C.O.D in the waste water from the dyeing mill was studied to develop effective adsorbent by using zeolite mined out Yeung ill, Korea. The amount of C.O.C. adsorbed by the adsorbent was measured at constant time interval for the whole operationg runs. The effect of particle size of zeolite used, initial concentratiom of C.O.D in waste water were investigated, and the kinetics and the equilibriun of adsorption were discussed from experimental data. In the kinetic study, the adsorption by zeolite is known to be controlled by intraparticle diffusion and, interier diffusion, and the adsorption equilibrium concentration of C.O.D. on zeolite is nearly equal to that of granular active carbon. Therefore the Yeungill zeolite could be effectively used as economic adsorbent in order to treat waste water of the dyeing industries.

大豆油의 脫검, 脫色, 脫臭條件 變化에 依한 色相變化

李聖甲,朴泰淳 한경대학교 2004 論文集 Vol.26 No.1

Deodorized soybean oils(DSO) were obtained to 2 types. Sample 1 was carried out a general refining process, which is degumming-alkali refining-bleaching-deodorizing. Sample 2 and 3 were not general refining process, its were carried out only both decantation of insoluble impurities and batch type deodorizing(BTD). At this time, BTD was composed of 3 stages, operating differences were vacuum degree, maximum temperature, stripping steam and retention time etc. DSO obtained were appeared original physicochemical characteristics. Sample 1 had acid value 0.034, Lovibond color 9.1Y10.9R, peroxide value 0 meq/kg oil and thin yellow color's soybean oil. But sample 2 had acid value 0.078, Lovibond color 65.0Y/18.39R/4.2B/0.1N, peroxide value 0.7 meq/kg oil and bright green color's soybean oil. Sample 3 had acid value 0.072, Lovibond color 37.3Y/3.8R/0.1B/0.1N, peroxide value 1.6 meq/kg oil and dark brown color's soybean oil. These colorful DSO were expects as raw materials of various seasoning oils as like pine needle and/or perilla leaf seasoning oil.

도로 노면의 형상과 강우의 임계 지속시간을 고려한 적정 우수 유출량 산정 및 영향분석

이종태,김영란,김갑수,윤세의,박영민 대한상하수도학회 2003 상하수도학회지 Vol.17 No.2

When calculating the storm runoff from road surface, it is recommendable to introduce the critical duration of rainfall by means of the RUNOFF (SWMM) model, or the Rational method with the travel time values of the kinematic wave' or Kerby's equation modified by multiplying the correction factor of 2.3 or 1.1, respectively. But the travel time of 5-10 minutes suggested in the Guide Manual for Sewer Design is too long to use for calculating road surface runoff. The peak runoff rate increases as the road sectional slope increases, whereas it shows the opposite results for an increase in the longitudinal slope. Also, the effects of the width and length of the road on the surface runoff rates increases greatly, as their values increase.

수출입 컨테이너 장치장 배정을 위한 소프트웨어의 개발

김갑환,김홍배,홍봉희,김기영,배종욱,최진오,김두열,이영기,박영만,박강태,손행대 한국경영과학회 1995 經營 科學 Vol.12 No.3

The Pusan Container Terminal faces a rapid increase in berthing time of container ships as well as in waiting time of external trucks, which is due to an absolute lack of yard space. This research is focused on the development of a decision support system for the planning of the container terminal yard assignment so that the yard space would be utilized most effectively. Efforts should be given to the reasonable assignment of the yard storage and the dynamic adaptation to the ever changing environment. The software introduced here is based o the know-how of the field exports and its framework takes the approach of the hierarchical decision making.

음식물 섭취에 따른 요중 마뇨산 배설량의 변화

김정일,박태혁,정갑열,신해림,김준연 동아대학교 산업의학연구소 2000 산업의학연구소 논총 Vol.- No.5

Objectives ; Urinary hippuric acid levels have been usually determined to evaluate workers exposes to toluene. Food and drink intake could affect urinary hippuric acid excretion and chi study was carried out to investigate what kinds of food and drink would affect urinary hippuric acid excretion. Methods ; The subjects were 136 medical school students. Authors measured urinary hippuric acid levels three times from 10 a. m. to noon; before, one hour after and two hours after food or drink-intake, and they were asked not to eat from the previous night(9 p. m) of testing. We selected six diets(bread and coffee, brown sauce noodle, Korean style meal, noodle, pork-galbi and rice and soybean stew and rice) , six fruits(apple, grape, orange, pear, persimmon and plum) and five beverages(Alps-D□, Demisoda□, Orange juice□, Pear juice□ and Pocari sweat□). Analysis of urinary hippuric acid was performed by high performance liquid chromatography. Results ; Intake of popular Korean diets, fruits and some drinks didn't affect urinary hippuric acid excretion. But intake of sodium benzoate-contained Alpa-D□ increased urinary hippuric acid excretion. Conclusions ; For the health examination on workers exposed to toluene, the history of diet and fruit intake can be negligible, but that of beverage intake should be included.

Hybrid Capture System과 PCR을 이용한 파필로마바이러스 DNA의 검출비교

이창훈,정태영,이미경,박종선,윤갑준 대한임상검사정도관리학회 2000 臨床檢査와 精度管理 Vol.22 No.1