골분을 이용한 구리 흡착 첨착

김은정,박정훈,김정섭,유현철,이봉섭,곽명화,우성훈,박승조 東亞大學校 環境問題硏究所 2005 硏究報告 Vol.27 No.1

Spent pig bone was consist of hydroxyapatite. And then we thought that it have a possibility as a adsorbent. The preparation of bone char prepared from spent pig bone in this study. We study on the recycling possibility as a adsorbent is able to adsorb copper ion from their single aqueous solutions. The results are summarized as follows. Bone char that prepared from spent pig bone at 105, 400, 700℃. The adsorption removal efficiency of copper ion onto bone char as adsorbent was above 90% for 15 hours. Increase in the initial pH of the copper ion solution result in an increase in the copper ion uptake per unit weight of the adsorbent. Freundlich isotherm model was found to be applicable for the experiment data of copper ion. The results showed that spent pig bone can be used for the absorption of the copper ion.

GMAHN 환경에 적응하는 에러 복구기능을 이용한 AODV 라우팅 프로토콜

정찬혁,오세덕,배진승,이기원,장양근,이광배,김현욱,유충렬,하재승 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-

Mobile nodes in ad hoc mobile networks typically communicate over wireless channels and are capable of movement. These are networks that support multihop communication and can be formed on a temporary basis. This paper proposes a solution that allows mobile nodes to access the wired Internet and to roam from base station to base station. And we also develop the efficient method that adapts in Global MANET which can be changed over time. It is observed that we can reduce not only error detection time but also network load, thus increasing the data reception rate in Global MANET Environment.

석탄회 및 석고첨가가 퇴비화에 미치는 영향

유현철,김정섭,곽명화,윤철종,이희인,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

Problems of wastes that pigs produce are increasing rapidly in the hog raising industry nowadays. consequently, the generation volume of excreta also is increasing but most of that is not disposed appropriately and exposed in eco-system therefore the disposal of stock excreta is becoming more and more serious. considering the physical and chemical characteristics of livestock excreta, the pollution loading rate - BOD, COD etc. - is very high. as alternative plan, that is, as one method kind of composisting, the utilization of the soil reformation agent will become one solution in managing the upper problems. also, the flyash of 3.7 million tons are producing every year and about 32.2% of that, 1.18 million ton is recycled as concrete, cement, cementassistance, road etc. consequently, the discharged flyash is not abandoned and a plan of recycling is needed acutely. gypsum of 4.16 million tons in 1998 presently was produced and about 57.2% of that, 2.38 million tons was recycled as cement, construction materials. the present stock is 25 million tons. therefore, in this study, because organic materials can be obtained in pig excreta and calciums can be obtained in gypsum, the small amount of elements can be acquired in flyash for the soil reformation agents, mixing the three materials - pig excreta, gypsum, flyash - adequately, investigated technique of making the soil reformation agents and described below in comparrision with the changes of temperature, PH TOC, T-N, TOC/T-N ratio etc.

TiO₂를 이용한 프로필렌 가스의 광촉매 산화반응

정대일,이동희,김용환,김현숙,이용균,박유미,최순규,김동현 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1

Photocatalyzed degradation of propylene gas was carried out over precoated titanium dioxide(anatase) illuminated W light in a flow reactor. photocatalytic oxidation of propylene gas indicated high conversion rates (78.0%) to CO₂ gas. And photocatalytic oxidation of gas according to a fold, twofold, and threefold of titanium dioxide(anatase) respectively gave high conversion rate. The longer reaction time was, the higher conversion rate to CO₂ gas showed.

Acylthiocholine의 합성

정두희,이지현,박유미,정대일,곽문정,신영주 東亞大學校附設基礎科學硏究所 1998 基礎科學硏究論文集 Vol.15 No.2

Choline esters that are used with substrate of EE-AChE-catalyzed hydrolyses were synthesized by two methods. 2-Chloroethyl thiohexanoate 4a, 2-chloroethyl thioheptanoate 4c, and 2-chloroethyl thiooctanoate 4b were synthesized by treatment of hexanoyl chloride 3a, heptanoyl chloride 3c, and octanoyl chloride 3b with ethylene sulfide 2. Hexanoylthiocholine 6a and octanoylthiocholine 6b were synthesized by using 4a and 4b with trimethylamine 5. Secondly after reaction ethylene sulfide 2 with dimethyl amine 7 and acylation by acid anhydride 8, heptanoylthiocholine 6c, decanoylthiocholine 6d were synthesized by treatment of methyl iodide.

TiO₂를 이용한 아세틸렌, 프로필렌, 프로판 가스의 광촉매 산화반응

정대일,변석인,이도훈,이용균,박유미,최순규,김동현 동아대학교 환경문제연구소 2002 硏究報告 Vol.25 No.1

Photocatalyzed degradation of acetylene, propylene, and propane gases were carried out over precoated titanium dioxide(anatase) illuminated UV light in a flow reactor. photocatalytic oxidation of acetylene, propylene, and propane gases respectively indicated high conversion rates (78.0%) to CO₂gas. And photocatalytic oxidation of three gases according to a fold, twofold, and threefold of titanium dioxide(anatase) respectively gave high conversion rate. The longer reaction time was, the higher conversion rate to CO₂gas showed.

지속적인 기립 작업에 의한 만성 하지 정맥 부전증 1예

정철,임현술,유선희 東國大學校醫學硏究所 2003 東國醫學 Vol.10 No.1

저자들은 10년 간 자동차 부품 조립공장에 근무하면서 지속적인 기립 작업에 의하여 하지 정맥류가 발생하였고 이후 하지 정맥 혈전증이 합병되어 통증과 부종을 수반하는 만성 하지 정맥 부전증으로 업무상 질병이 인정된 증례를 보고하는 바이다. 환례는 44세 여자로 1966년부터 우측 하지에 정맥류가 발생하였고 2001년 6월부터 시작된 하지 통증과 부종으로 2001년 7월 25일 정확한 진단을 위해 병원을 방문하였다. 과거력상 2001년 7월초 진단된 결핵 이외에는 혈관질환 등 기타질환을 앓거나 약물을 복용한 것이 없었고, 가족력과 사회력 조사에서도 정맥류와 관련된 특이한 점은 없었다. 환례는 현 직장에 1991년 입사하여 10년 간 동일한 조립공정 업무를 수행하였다. 작업은 계속 한 자세로 서서 일하는 형태였으며, 하루 총 작업식간은 8시간이었다. 진찰 소견상 우측 하지 후슬와부에 정맥류가 관찰되었고, 압박시 하지 통증과 부종이 관찰되었다. 입원시 실시한 우측 상행 하지정맥 조영술 검사상 호가장된 다수의 정맥이 장딴지에서 보이고 오금정맥이 하부 하지부에서는 불투명화 되지 않아 약 1개월간 병원에 입원하여 혈전증에 대한 항응고제 치료를 시행 받았다. 환례와 동일한 작업을 하는 동료근로자는 12명으로 작업 후 하지 통증은 모두 경험하였다고 하였으며, 이들 중 1례는 하지 정맥류가 관찰되었다. 프로트롬빈시간은 입원일 9.8초였다가 이후 정상으로 회복하여 퇴원시 11.5초를 보였으며, 활성 부분트롬보플라스틴시간도 입원 당시 퇴원시 33.4초로 회복되었다. 하지 통증 및 부종은 입원 중 점차 감소하였고 내원 당시 방사선 검사상 관찰되었던 하지 정맥 혈전도 소실되었다. 본 환례를 통하여 장시간 서서 일하는 근로자는 하지 정맥류에 대한 발생 가능성을 염두에 두고, 하지 통증이나 부종이 동반될 경우 혈전 여부 검사를 시행하여야 할 것이며, 그 원인추구에 있어서 반드시 직업관련성을 조사해 보아야 할 것이다. 작업장내 장시간 서서 하는 작업이 있을 경우에는 정기적인 검진을 통해 유소견자를 가려내고, 혈전증 예방을 위해 한 쪽 다리는 교대로 올려놓을 수 있는 발받침대를 설치하거나 작업 전 압력 스타킹을 신게 하는 등의 작업환경 개선에 대한 노력을 강조하여야 할 것이다. We report a case of chronic venous insufficiency with a history of 10 year standing work. The authors reviewed the clinical and hematologic features of the case. We also reviewed the job contents of her workplace. The worker was a 44-year old female who had worked in a mobile accessory factory for 10 years (1991-2001). She had been founded right leg varicous vein since 1996. The varicose veins induced severe pain and edema on June 2001. By venography, thrombus were detected and finally diagnosed as venous thrombosis on 25th July 2001. She regarded the occupational disease by longstanding work of standing position. She received anticoagulant treatment by one-month admission, and then improved the symptom and hematologic laboratory results. To prevent chronic venous insufficiency, we must modify working environments, begin comprehensive medical surveillance, educate workers on risk of lower leg venous problems, and increase workers awareness of safety regulations in the workplace.

유방암의 위와 대장전이

유현아,김은영,서민지,정은,조민정,오현진,장지혜,박지찬,이정의,박석영 이화여자대학교 의과학연구소 2014 EMJ (Ewha medical journal) Vol.37 No.2

Gastric metastasis from breast cancer is rare and only six cases have been reported in Korea. Colon metastasis is more rare than gastric metastasis. We report a 63-year-old woman with gastric and colon metastases of invasive lobular carcinoma of breast. She was diagnosed as right breast cancer, received right modified radical mastectomy 10 years ago and has been treated with chemotherapy and hormone therapy. Investigating for melena and a small caliber of stool, we found gastric and colon metastases. The diagnosis of metastatic breast cancer was made through gross pathologic and immunohistochemistry staining. We report a case with gastric and colon metastases from breast cancer and a review of the associated six case reports in Korea.

지속적인 기립 작업에 의한 만성 하지 정맥 부전증 1예

정철,임현술,유선희 약업신문사 1984 의약정보 Vol.10 No.1

멈춤신호놀이프로그램이 ADHD아동의 충동성과 자기통제력에 미치는 효과

유현정,김기홍 용인대학교 특수체육연구소 2008 특수체육연구 Vol.5 No.-

본 연구는 멈춤신호놀이프로그램이 ADHD아동의 충동성과 자기통제력에 미치는 효과를 알아보는데 그 목적이 있다. 연구대상은 서울시 S복지관에서 주의산만, 충동성, 과잉행동성향을 보인 ADHD판정을 받은 아동 3명이며, 단일대상연구 중 대상자간중다기초선설계를 이용하여 중재프로그램의 효과를 알아보았다. 그 결과 다음과 같은 결론을 도출하였다. 첫째, 멈춤신호놀이프로그램은 ADHD아동의 충동성을 감소시키는데 효과적이다. 둘째, 멈춤신호놀이프로그램은 ADHD아동의 자기통제력을 향상시키는데 효과적이다. The purpose of this study were to know the effects of the Stopping-signal Play Program on the impulse and self-control of the child diagnosed as ADHD. The subjects of the study were 3 boys who Showed the Severs degree of the distraction, impulse personality and hyperactivity by the judgment of diagnosis. The effects of experimental treatments were examined by using the multiple baseline across subjects in single subject study design. The results of this study were shown as follows : First, Stopping-signal Play Program was effective to decrease the impulsive behavior of the child diagnosed as ADHD. Second, Stopping-signal Play Program was effective to improve the self-control of the child diagnosed as ADHD.