철강산업 근로자들의 자각증상에 의한 피로도 조사

박종안 최신의학사 1981 最新醫學 Vol.24 No.2

우리나라 화학물질 분류 및 표시체계 분석

박종안,장봉기,이종화,김은화,김춘득,여은영,남상훈 순천향대학교 기초과학연구소 2004 순천향자연과학연구 논문집 Vol.10 No.2

Classification and Labelling system of Chemicals is a very important element for management of chemical safety. Classification and labelling system of Chemicals is very different among countries. This becomes a barrier for transportation of chemicals across counties. Recently, several international organizations (OECD,UNEP,ILO etc.) endeavor to harmonize classification and labelling of chemicals. In this study, we analyze classification and labelling system of chemical described in several regulations of our country, and examine acivities of IOMC(Inter-Organization Programme for the Sound Management of Chemicals)for harmonization of classification and labelling of chemicals. The Toxic Chemical Control Law, the Fire Services Law and the Industrial Safety and Health Law are the major regulation of management of chemical safety. Classification and labelling systems of chemical vary among several regulations. Particularly, labelling system of chemicals in transport vehicles are not appropriate in response to chemical accident. We suggest that task force team consisted with inter-administrative branches is needed to harmonize classification and labelling of chemicals, and recommend the introduction of UN number in labelling systems of chemicals in transport vehicles.

低溫灰化法에 의한 중금속 분석

박종안 순천향대학교 1986 논문집 Vol.9 No.2

This research was conducted to investigate the optimal conditions of low temperature ashing apparatus, modified electric furnace, to solve the difficult problems frequently occurring in the analysis of heavy metals in various samples. The results were as follows: 1. Analyzed values of the samples pre-treated by low temperature ashing apparatus obtained more accurate results than those obtained by wet analytical method. The coefficient of variation of analyzed values were 2.7% by low temperature ashing method and 7.4% by wet analytical method. 2. The optimal electric power(W) was 200-300 and oxygen flow rate(ml/min) was about one-third of each maximum electric power in values. 3. Ashing time was shortest at the optimal conditions and it took longer with the increased amount of samples. 4. Low temperature ashing method gave better recovery yield rate for Cd, Cu, Pb or Zn than muffle furnace ashing method. Muffle furnace ashing method using high temperature of 550℃ gave the yield as low as below 50% for Zn, Pb or Cd. It was suggested that the latter be not adequate for analysis of Zn, Pb or Cd, in the samples.

一部 樂器의 演奏音에 의한 暴露歷이 聽力에 미치는 影響

박종안,장봉기,이종화,안규동,이영세 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1

This study was carried out to evaluate the effect of playing musical instruments on hearing threshold level from May to October, in 1997. Pure tone audiometric tests was provided to musical instruments playing group of total 117 subjects(Samullnori; 35, military band; 25, symphony orchestra; 46, piano; 11), and reference group of total 7,477 subjects, selected after excluding workers with history of ear disease, of ototoxic drug administration, of noise induced hearing loss at workplace in Pohang industrial area. In addition, noise exposure levels of musical instrument players were assessed by noise dosimetry(exchange rate; 5dB, threshold level; 80dB, criterion level; 90dB), and produced age-adjusted hearing threshold level(=hearing threshold level of musical instrument player - hearing threshold level in same age of normal population group). The age-adjusted hearing threshold levels were analyzed by musician's career. The results were as follows; 1. The hearing threshold level of reference group was revealed more increased as within 4.98dB to 6.89dB at 1 KHz and within 5.26dB to 14.46dB at 4 KHz by ages than "the Standard of Age-adjusted Hearing Loss by Frequency(OSHA)" used for special health examination in the Ministry of Labour. 2. Equivalent continuous sound exposure level (Leq) by the group of instrumentalist was as following; within 104.95 to 112.62dB in samullnori, the highest, within 100.18 to 103.49dB in military band, within 77.00 to 82.74dB in symphony orchestra and 81.54dB in piano, the lowest. Playing maximum sound level by each musical instrument was as following; 122.8dB in Kkwaenggwari, the highest, 122.7dB in Changgo, 121.8dB in Alto saxophone, 115.5dB in Trumpet, 119.2dB in Horn, 112.8dB in Pungmul Buk and Ching, 112.5dB in Clarinet. 3. Average age-adjusted hearing threshold levels of instrumentalists were -0.65±6.38dB in left ear, -0.92±6.59dB in right ear at 1 KHz, and -1.14±12.88dB in left ear, -1.53±12.77dB at 4 KHz, which were better than normal, but the average age-adjusted hearing threshold levels of Samullnori players were 1.23±5.22dB in left ear, 1.94±6.91dB in right ear at 1KHz, and 8.40±15.75dB in left ear. 7.13±14.97dB in right ear at 4KHz, which were worse than normal. 4. Hearing threshold level in Samullnori players was increased with their career at 4 KHz, especially it increased rapidly when the musicians had played over 10years. It showed that there was a significant relationship between hearing threshold level and the career (P<0.01).

石油煖爐에서 放出되는 acidic emissions에 關한 硏究

박종안 순천향대학교 1991 논문집 Vol.14 No.3

본 연구로 연통이 없는 석유난로는 호흡성의 미세입자, sulfate 및 acidic aerosol 등의 실내 공기오염원이 되고 있음이 밝혀졌다. 따라서 석유난로를 사용하는 가정에서의 가족들은 고농도의 미세입자, sulfate및 acidic aerosol 등에 폭로될 수 있으며, 동시에 석유난로에서 나오는 SO₂, NO₂, CO 및 CO₂등에 폭로될수 있다. 이들 가정내에서의 sulfate와 acidic aerosol의 농도는 실외보다 높으며 가족들은 이와 같은 생활환경에서 장기간 폭로되게 된다. 석유난로를 사용하게 될 경우 acidic aerosol의 폭로 농도와 시간은 건강한 사람과 예민한 사람모두에 있어 건강의 위협이 될 수 있다. Chamber studies were conducted on four unvented kerosene space heaters to assess acidic emissions. The results of the chamber studies are as follows: 1. Unvented kerosene space heaters are a potential sources of respirable suspended particles, sulfate and acidic aerosol indoors. 2. Individuals in residences where kerosene space heaters are used may be exposed to high concentrations of fine particles, sulfate and acidic aerosol 3. Sulfate and acidic aerosol concentrations in these homes are likely to be considerably higher than those observed outdoors and residences are likely to be exposed for substantially longer times. 4. The concentration and length of exposure to acidic aerosol resulting from kerosene heater use may pose a health risk to both healthy and sensitive individuals exposed.

아산시 폐기물 처리현황

박종안,한성현,손부순,이종화,장봉기 순천향대학교 기초과학연구소 2001 순천향자연과학연구 논문집 Vol.7 No.1

This study was performed to investigates problem understanding correctly about all sorts present condition connected with current Asan city municipal solid wastes, and it wished to present way that can cope actively about predicted waste problem because establishing reasonable plan of wastes administration. The summarize result that examine from June, 1999 to May, 2000, is as following. 1.Until end of 1998 Asan city's number of total population being 180,224 people, is being low, but recently look sudden increase trend than our country average population increase rate 1.1% of 1994 years by yearly mean population increase rate 0.954% of past 21 years. Population size per generation was 5.4 people in 1978 but dropped to 3.0 people in 1998 because becoming low gradually. 2.Is high by 1998 years house self-support rate(93.95%) of Asan city, house form singleness house about 50% occupy, and the next time was 40.1% into apartment. 3.The average purity life wastes amount per 1 day including recycling is 164 tonnage in 1999, and more daytime expressed the occurrence amount than 0.963kg that life wastes amount of materials that 1 person comes forward in succession 1 day is national average of 1998 by 0.902kg in 1999. 4.The amount of Asan city's life wastes were higher than 59.3% that combustibility is national average by 64.8% in 1999, and was lower ratio than national average 28.7% by 26.5%. 5.The compositional weight fraction of food garbage, 42.3%, papers, 20%, in Asan city's wastes. 6.Occurrence amount of incombustibility ingredient appeared by thing which home which use briquet in heating yet because used briquet among them is higher than national average 17.2% by 27.2% being 14.7 ton/day is higher than national average. 7.Occurrence amount of recycling ingredient of Asan city life waste expressed the highest ratio by scrap iron kind 54.4% among two being 45.8 ton, and next many things occupied about 22% by paper kind. 8.The amount of landfill wastes except recycling in Asan city is 76.4 ton/day. 9.The purity landfill wastes amount that use volume-rate garbage disposal system envelope sale present condition (data 1997) is come to 66.6% of 76.4 ton that is normal that is carried to landfill 1 day and remainder 25.5 ton (33.4%) can presume that it occupies that unuse large size waste and partial volume-rate garbage disposal system envelope because whole Asan city gets into 50.9 ton/day by 0.280kg/day/person.

可變容量 다이오드(diode)를 利用한 廣帶域 半導體 同調回路에 對한 考察

박종안,박창균,박종백 조선대학교 생산기술연구소 1979 生産技術硏究 Vol.1979 No.-

Variable tuning circuits using semiconductor inductance are designed. Their impedance, hower, is dependent upon frequency, giving the effective inductance only in a certain limited range. This is the major weakness of semiconductor inductance. An attempt to solve this fault is shown at this paper. We have constructed a practical semiconductor inductancs tuning circuit which is stable over a wide frequency range, using variable capacitance diodes as variable componentes. And experimental results prove the validity of the theory.

힐버트 空間에서 非 擴大事象들의 共通不動點에 대한 反復法

朴鍾安 江原大學校 科學技術硏究所 1986 科學技術硏究 Vol.23 No.1

미생물 활성 촉진에 의한 생물학적 처리효율 평가에 있어서의 제한성에 관한 연구 ( Constraints of Bio-augmentation in Improving Performances of Biological Treatment Process )

박종안,허준무,손부순,장봉기,이종화 대한환경위생공학회 1999 대한환경위생공학회지 Vol.14 No.1

유기성 폐기물의 산발효 특성 및 알카리 전처리에 관한 연구 ( Characteristics of Acid Fermentation and Alkali Pretreatment of Organic Wastes )

박종안,허준무 대한환경위생공학회 2001 대한환경위생공학회지 Vol.16 No.1