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.

골수검사를 시행한 철결핍성빈혈의 임상적 고찰

안기완,홍승만,전의섭 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

Iron deficiency is a common one of nutritional deficiency, which denotes a deficit in total body iron. resulting from iron requirements that exceed iron supply. It remains the most common cause of anemia, both in the Korea and world wide. The development of iron deficiency progresses in stage. storage iron depletion occurs first. at this stage, a bone marrow aspirate staine with Prussan blue shows marked reduced or absent deposits of iron in macrophages and accompained by a decreased in the level of serum ferritin. in the next stage, the iron binding capacity of the serum rises, followed by a drop in serum iron. the final stage is the development of microcytic and hypochromic in circulating red cells. Bone marrow examinations is not essential diagnostic modality of iron deficiency anemia (IDA), but is necessary for early definitive diagnosis of IDA. So, We studied 65 cases of IDA patients who were performed bone marrow aspiration and biopsy. and 60 cases of normal healthy control from January 1990 to necember 1993 in Cho-sun University. The results of the analysis were as follows : 1) The total number of 65 patients were 26 males and 39 females. The peak incidence was at ages of 21-30 years and mean ages was 34.8 years. 2) Gastrointestinal bleeding was the most common cause of IDA (gastric ulcer 23.1%, duodenal ulcer 9.2%, gastric cancer 9.2% and hemorrhagic gastritis 4.2 %). 3) Most patients showed medical attention because of general (61.5%), gastrointestinal (58.5%) or cardio-pulmonary (36.9%)symptoms. 4) The mean hemoglobin level was 7.71± 0.83 g/dl, Mean corpuscular volume(MCV) 71.63± 4.56 fL, Red cell volume distribution width(RDW) 17.23±0.72 %, corrected reticulocyte 1.49±0.45%, serum iron 35.07±25.45 ug/dl, TIBC 352.44±43.99 ug/dl and serum ferritin 8.93±8.42 ng/ml. The peripheral red cell morphology was mainly microcyhz and hypochromic ficture(89.2% and 87.7%). Bone marrow iron stians showed that the suitable iron was absent, grade 0 in 92.3% and grade 1 in 7.7% 5) All cases were treated with iron preparation and 26.2% with blood transfusion(from 1 unit to 15 units). 69.2% showed complete recovery with therapeutic maneuvers and 30.1% relapse or no reponse which was probably stemmed from uncorretability(9.2%), uncooperability (9.2%), side effect(3.1%) and replapse of underlying diseases(6.2%). IDA is not definitive diagnosis, but one of the clinical sign of etiologic diseases. So, for the definintive treatment. it is important that the etiologic diseases were corrected.

제주 동부 우도의 해빈퇴적물에관한 연구

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

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.

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.

탄소섬유시트에 의한 슬래브 보강에 관한 실험적 연구

박호완,박기영,권혁문 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

Recently, Carbon Fiber Sheets(CFS) have been used for strengthening the deteriorated RC beams and slabs because of its resistant capacity of corrosion and easy repairing works. In this study, the static tests are performed on RC slabs strengthened with CFS. Test results show that ultimate strength of specimens strengthened with CFS is Increased as 6∼37% comparing to the control specimen. Test parameters are the shape of strengthening, the number of sheet layer and the dry condition of concrete. Deflection, failure load, strains of reinforcing bar, concrete and carbon fiber sheet are measured from tests(one points loading). The failure mode and the most suitable spacing and width of CFS are discussed from these measured data. Each of one-on-one strengthening of a pure interval and width of Carbon Fiber Sheet(CFS) 25 centimeters specimen has the advantage of the ultimate load. Because strengthening method of regular intervals than method of the whole check un aspect of crack progres. It has the advantage of an aspect of maintenance management and it has load-resisting similar to method of the whole surface strengthening as a layer is large in number. Because moisture contents of concrete have an effect on strengthening capacity, when CFS was bonded, the primer affirmed for moisture will be developed.

인슐린 비의존형 당뇨병 환자에서 24시간 혈압 변동 및 요중 알부민 배설량에 관한 연구

주기산,안기완,정종훈,배학연,홍순표 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

Recently, blood pressure(BP) starts to increase in close relationship to development of persistent microalbuminuria in diabetes. Thus, author studied 24-hour BP changes in diabetics compared to the those in nondiabetics and the changes of urinary albumin excretion (UAE) according to 24-hour BP changes in diabetics with microalbuminuria. Twenty-four-hour ambulatory blood pressure monitoring(ABPPM) was performed in 38 NIDDM patients(18 normotensives and 20 hypertensives) and in 37 control subjects without diabetes(18 normotensives and 19 hypertensives) . Also 24-hour ABPM was performed in 38 diabetics (20 microalbuminurit and 18 normoalbuminuric). The analysis of individual recordings allowed us to detect an impaired circadian pattern(the disappearance of the nocturnal BP decrease or a paradoxical BP increase) in 30% of the normotensive and 31% of the hypertensive diabetics. Twenty-four-hour ABPM(night systolic/diastolic ±SD mmHg) was significantly higher in microabluminuric(124.2 ±11.4/75.1±8.2 mmHg) than in normoalbuminuric subject, (114.0±7.6/64.6±6.6 mmHg, p<0.05). This study suggests that not only awaking BP but also especially day-night minimum SBP decrease are highly responsible for the renal impairment in NIDDM patients, unrelation to hypertension. Thus. ABPM reflects the association between UAE and blood pressure in diabetics more precisely than clinical measurements. and a significant correlation exists between rate of increase in Urinary albumin excretion and blood pressure in diabetics.

대구지역 PM10 오염 관리를 위한 시간적 및 공간적 오염 특성 평가

조완근,권기동 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1

Present study analyzed the temporal and spatial characteristics of PM10 pollution in Metropolitan Daegu area based on air pollution monitoring station data and measurements of PM10 concentrations in background area in order to provide essential data for efficient PM10 pollution management. The significant variation of spatial and temporal PM10 concentrations in Daegu area was observed during the study years. The highest maximum PM10 concentration(332 ㎍/m²), average concentration(88 ㎍/m²) and frequency exceeding PM10 daily standard(150 ㎍/m²) were all observed in Namsandong located near a major roadway. The hourly and weekly variations of PM10 concentrations had different pattern for the measurement sites. The monthly and seasonal concentrations exhibited a notable characteristic: the maximum concentration was obtained in spring season, most likely due to Yellow sand effects. Furthermore, this temporal variation of PM10 pollution varied with study site. Meanwhile, the PM10 values measured at the monitoring site, Manchondong, were comparable with those of a control site. The average PM10 concentration ranged from 23 ㎍/ m² to 115 ㎍/ m² with a mean value of 53 ㎍/ m² in the former site and from 22 ㎍/m² to 91 ㎍/m² with a mean value of 45 ㎍/m² in the latter site.

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.

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.