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허영덕,송하철,국원근,Heo, Yeong-Deok,Song, Ha-Cheol,Guk, Won-Geun 대한화학회 2006 대한화학회지 Vol.50 No.1
구조의 유기-무기 혼성화합물 Cu2(OH)3(CH3COO)·H2O를 선구물질로 사용하여 Cu2O를 합성하였다. 75oC의 수용액에서 Cu2(OH)3(CH3COO)·H2O를 글루코오스로 환원시켜서 정육면체 Cu2O를 합성하였다. 선구물질과 글루코오스의 효과를 조사하였다. Cu2(OH)3(CH3COO)·H2O의 구조는 균일한 크기의 Cu2O를 만드는데 중요한 역할을 한다. has been synthesized using the layered organic-inorganic hybrids, Cu2(OH)3(CH3COO)·H2O as a precursor. Cubic Cu2O is synthesized by reducing Cu2(OH)3(CH3COO)·H2O with glucose in water at 75oC. The effects of precursor and glucose are investigated. The structure of Cu2(OH)3(CH3COO)·H2O plays an important role in preparing the uniform size of Cu2O.
허영덕,권석순,국원근,Huh Young-Duk,Kweon Seok-Soon,Kuk Won-Kwen 한국결정성장학회 2005 한국결정성장학회지 Vol.15 No.5
층상 구조의 유기-무기 복합 소재 $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$를 전구체로 사용하여 CuO를 합성하였다. 외부의 다른 유기화합물 주형이 없이 단순한 $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$의 열분해 방법을 사용하였다 이 방법은 저렴한 가격으로 단일 결정의 CuO 입자를 양산하는 방법을 제공한다 응집된 CuO 입자의 형태는 전구체의 구조에 크게 영향을 받는다. CuO has been synthesized using the layered organic-inorganic hybrids, $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$ as precursor. The simple thermal decomposition of $Cu_2(OH)_3(CH_3COO){\cdot}H_2O$ is used without any external organic templates. This method provides large-scale production at a low cost of the single-crystalline CuO particles. The morphology of CuO aggregated particles is strongly dependent on structure of the precursor.
김현영 ( Hyeon Yeong Kim ),황양인 ( Yang In Hwang ),국원근 ( Won Kwen Kuk ) 한국산업위생학회 2012 한국산업보건학회지 Vol.22 No.2
Objectives: Epichlorohydrin is a material that has been predicted to have high volatility and strong toxicity and is used normally in working area. Therefore, the hazardous and dangerous level and the foreign management system about epichlorohydrin should be invested at home and abroad and through hazard assessment for occupational environment measurement and exposure status of industrial workers in domestic working area. Methods: To assess risk and to suggest Development and Adoption to prevent health damage of workers owing to the epichlorohydrin exposure, the hazardousness and dangerousness of epichlorohydrin and its practical examples and regulation level for domestic and abroad health impairment are researched on the base of various references. Results: The epichlorohydrin caused skin and mucus membrane irritation, respiratory paralysis, kidney and live damage under the influence of acute toxicity and in animal study, it was confirmed as a doubtful carcinogenic substance to trigger reducement of sperm number and reproduction ability, abnormal spermatogenesis, mutagen, increase of forestomach epithelium and occurrence of papilloma and so on, as well as it induced stimulus asthma and allergic contact dermatitis for exposure workers. Conclusions: Epichlorohydrin was found to occur allergic contact dermatitis, carcinogenesis doubt and reproduction toxicity and was verified as a material which would be established reinforcement of management level to care health of handlers, such as denotement dangerousness of skin absorption.
Ammonium nitrate의 유해성과 작업환경 관리
김현영 ( Hyeon Yeong Kim ),황양인 ( Yang In Hwang ),국원근 ( Won Kwen Kuk ) 한국산업위생학회 2012 한국산업보건학회지 Vol.22 No.3
Objectives: The purpose of this study is the work environment management method through risk assessment and investigation of the work place that deals with Ammonium nitrate, based on information in and outside the country. Methods: This study suggests method of work environment management through risk assessment and investigation of the work place that deals with Ammonium nitrate, and finds out cases of Ammonium nitrate causing hazard, danger and health risk, based on literature investigation. Results: Rats exposed repeatedly to LD50 2,217 mg/kg(rat), LC50 88.8 mg/L(rat, skin) which cause high level of skin irritation, reported 1 mg/m3 of NOAEL, while LOAEL was less than 100 mg/kg for the rats orally administered with the LD50 2,217 mg/kg(rat), LC50 88.8 mg/L(rat, skin), for 13 weeks, Domestically 31,640 ton/y of ammonium nitrate has been used in 22 workplace and the result of workplace assessment was 0.0171-0.9983 mg/m3, ADD was 8.77-59.63ug/kg-day according to the exposure scenario. In other words the result of the risk assessment goes beyond the ``standard 1``. Conclusions: Ammonium nitrate creates a high level of irritation and toxicity when coming in breathe it or contact with skin, and is classified as category3 of GHS and specific target organ toxicant (irritating respiratory system), Exposure level at work places needs to be maintained under 1 mg/m3, to prevent workers from being damaged.
GHS 화학물질 분류기준과 분류결과의 비교 및 화학물질 정보자료의 활용방법 연구
이권섭 ( Kwon Seob Lee ),임철홍 ( Cheol Hong Lim ),이종한 ( Jong Han Lee ),이혜진 ( Hye Jin Lee ),양정선 ( Jeong Sun Yang ),노영만 ( Young Man Roh ),국원근 ( Won Kwen Kuk ) 한국산업위생학회 2008 한국산업보건학회지 Vol.18 No.1
The use of chemical products to enhance and improve life is a widespread practice worldwide. But alongside the benefits of these products, there is also the potential for adverse effects to people or the environment. As a result, a number of countries or organizations have developed laws or regulations over the years that require information to be prepared and transmitted to those using chemicals, through labels or Material Safety Data Sheets (MSDS). While these existing laws or regulations are similar in many respects, their differences are significant enough to result in different labels or MSDS for the same product in different countries. Given the reality of the extensive global trade in chemicals, and the need to develop national programs to ensure their safe use, transport, and disposal, it was recognized that a Globally harmonization system of classification and labeling of chemicals(GHS) would provide the foundation for such programs. This study offered complementary details of GHS classification criteria adopted in Korea by analyzing the differences in chemical classification system between UN and Korea Ministry of Labor. Also it is proposed that mutual agreement of information DB used is required by comparing classification results of chemicals in Korea, Japan, and EU. We offered the lists of information sources useful for chemical classification.