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김응호,김영환,정동용,신영준,유재형,최청송 ( Eung Ho Kim,Young Hwan Kim,Dong Yong Chung,Young Joon Shin,Jae Hyung Yoo,Cheong Song Choi ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.2
The Kinetics of the decomposition of H₂O₂ in the acidic solution was investigated. The investigation was conducted within the range of HNO₃ concentration of 0-4 M at temperature of 70, 80 and 90℃, respectively. The decomposition reaction is first order with respect to [H₂O₂] and is enhanced by acid-catalytic effect above HNO₃ of 2 M. The rates are as follows; In[H₂O₂]/[H₂O₂]_0= -2.23×10^(10) exp(-18200/RT) ·t ([H^+]<2M) In[H₂O₂]/[H₂O₂]_0=-[2.23×10^(10) exp(-18200/RT)+2.1×10^(12) exp(-21200/RT) ([H^+] -2)] ·t ([H^+]>2M) The effect of UO₂^(+2), Nd^(+3), Pd^(+2), F^(+3), MoO₂^(+2), Sr^(+2), and Cs^+ on the decomposition of H₂O₂ in the solution were examined too, and the rate was compared with that obtained from metal ion-free solution.
김응호,김영환,정동용,유재형 ( Eung Ho Kim,Young Hwan Kim,Dong Yong Chung,Jae Hyung Yoo ) 한국공업화학회 1997 공업화학 Vol.8 No.1
본 연구에서는 질산매질에서 UV 광조사에 의한 옥살산 분해연구가 수행되었다. UV 광원은 2537 의 파장을 방출하는 수은램프가 사용되었다. UV 광조사에도 불구하고 옥살산 자체는 분해되지 않았다. 그러나 질산매질하에서 UV 광조사에 의해 옥살산은 쉽게 분해되었다. UV 광조사에 의해 NO₃-으로부터 발생되는 산소라디칼이 옥살산을 분해시키는 것으로 조사되었다. 옥살산 분해율은 질산 0.5M 부근에서 최대를 이루다가 질산농도 증가에 따라 점차 감소하였다. 이것 역시 산소라디칼과 NO₃- 사이에서 반응으로 쉽게 설명될 수 있다. Decomposition of oxalic acid was studied in nitric acid media by using UV radiations. The UV source is Hg-lamp, emitting 2537 , wavelength. Oxalic acid was not decomposed by itself in spite of UV radiation, but in the presence of nitric acid decomposed easily under UV radiation. It is believed that oxygen radical generated from nitrate ion by UV radiation results in the decomposition of oxalic acid. Decomposition rate of oxalic acid reached a maximum in around 0.5M HNO₃ and then gradually decreased with nitric acid concentration. Thd decrease can be also explained to be due to the reaction between oxygen radical and NO₃-.
Bacillus 우점 슬러지를 이용한 탄닌산 및 Bisphenol-A의 흡착제거 특성
김응호 ( Eung Ho Kim ),박재로 ( Jae Rho Park ),임수빈 ( Soo Bin Yim ) 한국수처리학회 2011 한국수처리학회지 Vol.19 No.5
This study was performed to investigate the adsorption characteristics of tannic acid and bisphenol-A(BPA) on Bacillus sludge, which is utilized as a predominant species in Rotating Activated Bacillus Contactor (RABC) process for the treatment of wastewater. The Bacillus sludge showed significantly high adsorption capacity of tannic acid and BPA, compared with activated sludge in a general sewage treatment plant. The Bacillus sludge exhibited the adsorption capacity of 60.0% and 97.7% for tannic acid and BPA, respectively while the activated sludge did 10.1% and 93.9%. The higher adsorption capacity of Bacillus sludge than activated sludge might be attributed to the Extracellular Polymer Substance (EPS), which is secreted by Bacillus sp.. The EPS could enhance the adsorptive characteristics of Bacillus sludge because the polymeric characteristics of EPS is more likely to adsorb the recalcitrant organics. Both Langmuir and Freundlich isotherm models properly simulated the adsorption behavior of tannic acid and BPA on Bacillus sludge. The highly adsorptive characteristics of Bacillus sludge are expected to be widely applied to the treatment of municipal wastewater or industrial wastewater containing recalcitrant organics.
고요산혈증을 보이는 한국인 건강검진 내원자들에서의 통풍의 유병률과 관련 인자들에 관한 연구
김응호 ( Eung Ho Kim ),전경만 ( Kyeong Man Jeon ),박건우 ( Keon Woo Park ),김형진 ( Hyung Jin Kim ),안중경 ( Joong Kyong Ahn ),전찬홍 ( Chan Hong Jeon ),차훈석 ( Hoon Suk Cha ),고은미 ( Eun Mi Koh ) 대한류마티스학회 2004 대한류마티스학회지 Vol.11 No.1
Objective: To investigate the prevalence of gout among hyperuricemic Korean people who visited Health Screening Center and to study related factors in the development of gout. Methods: The medical records of 6,461 people who visited Health Screening Center from March to May in 2002 were reviewed. Five hundred twenty one out of 603 hyperuricemic individuals were interviewed by telephone. Gout was diagnosed according to the clinical criteria of Wallace. Basic demographic and lifestyle variables as well as biochemical data were collected. Results: The prevalence of hyperuricemia was 14.3% in men and 2.2% in women. The prevalence of gout among hyperuricemic population was 16.6% for men and 6.7% for women. The mean age was higher in gout patients compared to the hyperuricemic people without gout, and serum uric acid and creatinine levels were increased in gout patients. The mean systolic blood pressure and the alcohol consumption amount were also increased in gout patients. In the multiple logistic regression analysis, statistically significant related factors for the development of gout among hyperuricemic population were age, uric acid level and alcohol consumption amount. Conclusion: The prevalence of gout among hyperuricemic Korean people who visited Health Screening Center was 16.6% for men and 6.7% for women. The possible related factors in the development of gout among hyperuricemic population were age, uric acid level and alcohol consumption amount.