완도지역 납석폐석의 철분 및 석영 제거를 위한 기초연구

김홍기 ( Hong-gi Kim ),김소연 ( So-yeon Kim ),김완태 ( Wan-tae Kim ),강헌찬 ( Heon-chan Kang ) 한국환경기술학회 2014 한국환경기술학회지 Vol.15 No.6

완도광업소에서 산출되는 납석 중 폐석으로 분류되는 납석을 대상으로 철분 및 석영 제거를 위한 기초연구를 진행한 결과 다음과 같은 결론을 얻었다. 분쇄효율은 Rod Mill로 3분 간 분쇄를 실시하였을때 -30mesh의 시료가 24.76%, -325mesh의 시료가 19.36%로 상대적으로 우수한 것을 확인하였다. 포수제로 Aero #825 Promoter를 사용하고 활성제로 케로젠을 아세톤에 희석하여 부유선별을 실시하였을 때, 철분의 실수율이 pH 6에서 31.56%로 우수한 것을 확인하였다. 포수제로 K.A.X를 사용하여 부유선별을 진행한 경우 pH 4에서 SO₃의 실수율이 40%로 나타나는 것을 확인하였다. 포수제로 Aero #825 Promoter와 K.A.X를 혼합하여 사용한 실험의 결과 실수율이 pH 10에서 35.90%로 우수한 것을 확인하였다. 자력선별을 실시한 결과 5.4K gauss에서 철분이 약 45%까지 제거되는 것을 확인하였다. 석영분리를 위한 부유선별 결과 포수제로 Amine Hoe F 3638을, pH 조절제로 HF를 사용하였을 때 pH 2에서 석영함량이 부상물에서 17.99%, 침강물에서 37.08%로 우수한 것을 확인하였다. The main purpose of this study is to find an effective separation process for removing Fe and SiO₂ from Pyrophyllite-containing wastes in Wan-Do area, South Korea. The results are as follows. Grinding efficiency of a rod mill were 31.56% and 19.36% for samples passing through 30 and 325mesh sieves, respectively, which are higher than those of a ball mill. Recovery rate of Fe was 31.56 % at pH 6 by using a flotation separation method, with Aero #825 Promoter as a collector and Kerosene diluted with Acetone as an activator. Recovery rate of SO₃ was 40% at pH 4 using K.A.X as a collector. Recovery rate of mineral ferruginous and sulfide was 35.90% at pH 10 using Aero #825 and KAX as a collector. About 45% of Fe were separated using magnetic separation at 5.4K Gauss. Quarts content were 17.88% in float and 37.08 % in sink at pH 2, with Amine Hoe F 3638 as a collector and HF as a pH regulator.

병원균의 파괴효율 및 배기가스 분석에 의한 병원폐기물 소각로의 성능평가

김석완,박기호 慶山大學校 1998 論文集 Vol.16 No.1

Recently, a quantity of medical waste has been increased according to the expansion of medical facilities caused by rising in living standard and in need for a healthy life. The status of medical waste management is, however, still in an infant stage, Incineration has been proven to be an effective technology of reducing volume, mass and toxicity of medical waste. There are few medical waste incinerators in Korea, but most are not even operated properly. And pathogen's release and emission of various air pollutants can affect the public directly because most medical waste incinerators are located in the crowded area. To assess the release potential of pathogenic bacteria from biomedical waste incinerator, the incinerator is spiked with 3.70 x 10의9승 spores of Bacillus stearothermophilus that are poured on crumpled newspaper in plastic bags and are burned with routine waste. The experimental result of air emission, the total destruction efficiency of surrogate bacteria was99.9957%. SO₂ and NOx emission are lower than emission standards. But higher value of CO emission are made with three times.

결핵치료제인 시판 리팜피신제제의 생체내 이용율

김종두,안기완,서영환,조경상,김철,김상도,홍순표 朝鮮大學校 附設 醫學硏究所 1992 The Medical Journal of Chosun University Vol.17 No.1

This study was attempted to investigate the dissolution rate and the bioavailability of commercially available rifampicin preparations after oral administration in nine normal volunteers. Cross-over design was used for the analysis. The dissolution test was conducted in artificial gastric juice and artificial intestinal juice using basket method with four rifampicin preparations (A, B, C, and D) which were pharmaceutically equivalent. The results were as follows; The dissolution rate was higher in the order of A>C>B>D in artificial gastric juice, and A>B>C>D in artificial intestinal juice. Area under the blood concentration time curve (AUC) was larger in order of A>C>B>D. Relative bioavailability(%) of rifampicin preparations were 93.6% for B, 97% for C, 84.4% for D preparation compared with standard A preparation. Peak blood concentration (Cmax) was higer in order of A>B>C>D. Peak time (Tmax) was larger in order of D>C>A>B. Absorption rate constant (Ka) was larger in order of B>A>D>C. there was little difference in elimination rate constant and biological half-life. The correlation of the dissolution rate in artificial gastric juice and area under the blood concentration time curve as well as correlation of the dissolution rate in artifical intestinal juice and peak time showed significant linear relationship. From the result of the this experiments, it can be concluded that for the choice of preparations, bioavailability must be performed in man because the bioavailability of rifampicin preparations showed big differences among commercial preparations which were abvertised as pharmaceutically equivalent, and that the bioavailability of rifampicin preparations in man partially could be predicted from the results of dissolution rate.

대동맥 이첨판과 승모판 이탈증을 동반한 대동맥 판하부 협착 1예

김용화,장경식,양태영,임영국,안기완,홍순표 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Discrete subaortic stenosis is a rare cardiac disorder especially in Orientals which occupies eight to ten percent of aortic stenosis, It occurs mainly before age of eighteen and accompanies with aortic valve abnormalities such as aortic stenosis, supravalvrlar stenosis, bicuspid valve and muscular hypertrophic subaortic stenosis, and other cardiac abnormalities such as ventricular septal defect, pulmonary stenosis and coarctation of aorta. There is no report of discrete subaortic stenosis accompanied with mitral valve prolapse. The major complications of discrete subaortic stenosis are aortic insufficiency, and subacute bacterial endocarditis. We report a case of asymptomatic nineteen-year-old male of discrete subaotic stenosis with bicuspid aortic valve and mitral valve prolapse, which is comfirmed by two-dimensional and Doppler echocardiography including transesophaigeal echocardiography.

본태성 혈소판 증다증 2예

주기산,임현성,김미자,양태영,허경,김완중,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Essential thrombocythemia is a chronic myeloproliferative disorder of unknown origin, charcterized by excessive number of morphologically and functionally abnormal platelet in peripheral blood and abnormal proliferation of megakaryocytes in bone marrow. Its main clinical manifestations are hemorrhages and thromboses. The aim of therapy is suppression of the excessive bone marrow activity, which can be achieved by radioactive phosphorus, alkylating agent, hydroxyurea and interferon. Two cases were diagnosed at our hospital which had laboratory and clinical features compatible with this disease. We have successfully treated patient with hydroxyurea and platelet antiaggregating agent.

제주 동부 우도의 해빈퇴적물에관한 연구

고기원,윤정수,김성복 제주대학교 해양연구소 1988 해양자원연구소연구보고 Vol.12 No.-

하부팽창형 임프란트의 유한요소 분석 및 골형성에 대한 연구

한석환,김영규,민경기,조완석,권종진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.3

The aim of this study was to evaluate by finite element analysis influence of investigated expanding implant on stress distribution and to observe biocompatibility, bone formation feature and change in the bone contact area around the explanding implant through experimental animal study. FEA models of the mandible were constructed based on three-dimensional graphic data of the bone structure around an osseointegrated implant, analysis of stress distribution followed by 100N vertical, 50N horizontal was done. And in the animal study, expanding implant were placed in the mandibles of eight Korean mongrel dogs and analyzed the results with histomorphometric measurements. In finite element analysis, compressive stresses are produced at the bone tissue surrounding the implant, and the contact area between the implant and the bone tissue is increased, which result in increased resistance to horizontal and vertical pressure loads. In the histomorphometric analysis, the measured ratio of the contact surface and bon density between implant and bone was similar to those of the controlled group from 6 weeks. It is thought that increased horizontal and vertical resistance is a great help to the immediate loading on expanding implant and that there needs standardizing quantitative measurement of implant stability and osseointegration to determine whether or not to use the functional loading and to reduce the total treatment period reliably by placing functional loading on each implant based on both bone quality and implant stability.

두경부 편평세포암에서 형질전환 성장인자-알파(TGF-α)의 발현에 관한 연구

도남용,이승학,김완수,김경일,이동용,김용기,최봉남 조선의대 1996 The Medical Journal of Chosun University Vol.21 No.2

조직구성 수성망상증 2예

최연수,박일,죄희충,김원식,양태영,허경,안기완,정춘해 조선대학교 1993 The Medical Journal of Chosun University Vol.18 No.2

Histiocytic medullary reticulosis (HMR) is a malignant noeplastic process, with tumor cells belonging to the histiomonocytic line, and originally described by Scott and Robb-Smith in 1939 characterized by its acute onset, progression to death within a few months and its clinical features are fever, lymphadenopathy, hepatosplenomegaly, jaundice, and purpura common laboratory findings are characterized by severe anemia, leukopenia, thrombocytopenia and histologically by systemic progressive invasion of morphologically atypical histiocytes or of their precursor. 61 and 37-year-old males were admitted with camplaints of high fever and chilling sensation and were treated by cyclophosphamide, vincristine, prednison and antiobiotics, but patients all died 17 and 14 days after admission due to probably sepsis and respiratory failure.

Cardiovascular and Gastrointestinal Effects of Etoricoxib in the Treatment of Osteoarthritis: A Systematic Review and Network Meta-analysis

( Dam Kim ),( Soo-kyung Cho ),( Seoung Wan Nam ),( Hyuk Hee Kwon ),( Sun-young Jung ),( Chan Hong Jeon ),( Seul Gi Im ),( Dalho Kim ),( Eun Jin Jang ),( Yoon-kyoung Sung ) 대한류마티스학회 2017 대한류마티스학회지 Vol.24 No.5

Objective. To estimate the cardiovascular (CV) and gastrointestinal (GI) risks of etoricoxib in the treatment of osteoarthritis (OA) compared to a placebo and other non-steroidal anti-inflammatory drugs (NSAIDs). Methods. A systematic review of randomized, controlled trials (RCTs) of etoricoxib were performed. Bayesian network meta-analysis was used over a duration of 12 weeks. The incidence of CV and GI events for a duration ≥26 weeks were also tabulated and presented using descriptive statistics. Results. From this search, 10 studies were identified. Of these, 6 and 5 RCTs that measured the CV and GI events at 12 weeks were included in meta-analysis. They showed that etoricoxib did not increase the CV events compared to the placebo or NSAIDs during the 12 week period (odds ratio [OR]=0.59 compared to celecoxib, OR=0.89 with ibuprofen, OR=0.70 with placebo, and OR=2.16 with naproxen). The risk of GI events was comparable to that of most comparators, with the exception of naproxen, which had a significantly lower risk of GI events (OR=0.18) during the 12 week period. For a duration ≥26 weeks, the incidence of CV and GI events with etoricoxib increased with increasing duration. Conclusion. Etoricoxib is an alternative short-term treatment option for OA, showing comparable CV and GI complications to other NSAIDs. Nevertheless, further studies will be needed to elucidate the long-term safety of etoricoxib in the treatment of OA. (J Rheum Dis 2017;24:293-302)