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김정인,김상용,신병철,김경남,서영욱,이범주,김진화,배학연 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2
Hypoparathyroidism is usually the result of an inadvertent surgical removal of all the parathyroid glands, In some instances, not all the tissues are removed, but the remainder undergoes vascular supply compromise secondary to the fibrotic changes in the neck after surgery, Previously, the surgery for hyperthyroidism was the most frequent cause of acquired hypoparathyroidism. Idiopathic hypoparathyroidism is a relatively rare disease that is characterized by hypocalcemia and hyperphosphatemia due to a parathyroid hormone deficiency of an unknown cause, It usually develops at a young age, and shows various clinical symptoms and signs accompanied with hypocalcemia. In addition, it is rarely associated with polyglandular autoimmune syndrome during the follow-up. Hypocalcemia and idiopathic hypoparathyroidism associated with labor and lactation are rarely reported condition previously. We here describe a case of a woman in whom the symptomatic severe hypocalcemia appeared after her delivery. We reviewed all the previously reported cases and suggest a possible physiological explanation for the association between pregnancy, lactation, and the appearance of symptomatic hypocalcemia.
위암 환자의 복강내 투여를 위한 Activated Charcoal-Alginate Bead 제형으로부터 Mitomycin C의 용출 거동
이진호,최선웅,서중기,김동민,정경수,오정연,김진향,노승무,민병무,김용백,김창식,박근성,강대영,송규상,양준묵,조준식,정현용,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1
Locoregional recurrence is the most common type of recurrence in surgical operation of gastric adenocarcinoma, and peritoneal dissemination is one of the most difficult problems in advanced gastric adenocarcinoma treatment. Because the peritoneal cavity is the most common site of the first recurrence after gastric cancer resection, intraperitoneal chemotherapy seems a logical choice for cancer chemotherapy. In this study, Mitomycin C (MMC)-activated charcoal (CH)-alginate (ALG) beads were prepared by the mixtures of CH particles adsorbed with MMC as an anti-cancer drug and aqueous alginate solution. The alginate is recognized as biodegradable, nontoxic, and biocompatible. The release of MMC from the beads in 0.1 M Tris buffer was stable and continuous until about 1 week. The MMC-CH-ALG beads can be applied in the peritoneal cavity for intraperitoneal chemotherapy since they provide a good adhesiveness on the tissue and controlled release pattern of the drugs.
경연 대회를 통한 초ㆍ중고생의 창의력 신장 효과에 관한 연구
이희복,육근철,류해일,김현섭,김희수,박달원,유병환,김선효,김여상,서광수,변두원,서명석,배성효,박종석,심규철,이성희 공주대학교 과학교육연구소 2001 과학교육연구 Vol.32 No.1
미래 사회를 대비하기 위한 개인의 개성을 존중과 창의적인 능력을 지닌 인간을 양성을 목적으로 충청남도 지역의 초 ㆍ 중고등학생들을 대상으로 한 창의력 경연대회가 공주대학교 과학교육연구소에서 개최되었다. 충청남도 초 ㆍ중 ㆍ 고등학생들을 대상으로 실시한 창의력 경연대회는 창조적 아이디어를 내어 스스로 문제를 해결해 나갈 수 있는 교육 프로그램을 제공하는 좋은 기회였음이 확인되었으나, 일부의 팀에서만 참신하고 재미있는 아이디어들이 제안되었다. 여학생의 참가자 수가 상당히 증가하였으며, 대체적으로 입상권의 학생들의 상당 부분이 여학생이라는 것이 특이할만하다. 학년이 올라감에 따라서 창의적인 아이디어를 내는 양이나 질에 있어서 뒤떨어지는 것으로 분석되었으며, 토론 학습의 적응력이 미흡하고 발표력 및 청취력에 있어서도 떨어지는 것으로 나타났다. 따라서 중 ㆍ고등학교의 학교교육에서도 학생들에게 프로젝트형 탐구학습 프로그램의 적용은 물론 토론식 수습을 통한 학생들의 사고의 전환의 기회를 제공해야 할 것으로 사료된다. The creativity competition was held to foster the creativity of elementary and secondary school students in the Institute of Science Education, Kongju national University. It was found that the creativity competition effected on the improvement of inventing creative ideas and problem solving activities. But, only some competitors participated in semifinal and final contests, presented original and interesting ideas. More female students participated in competition than last year. More female participants were awarded a prize than males. Totally, participants were defective in discussion and communication, and presentation and listening ideas. Increasing grades correlated inversely with creativity and originality. There is need of inquiry project teaming programs and presenting opportunities of conversion of thinking by discussing instructions in school
김도군,천상욱,김병군,서인석,박철휘,김성준,류수현 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4
Intermittent aeration processes have been much of interest as an excellent alternative for nutrients removal for upgrading secondary wastewater treatment plants, with minimum modification. Also, operational flexibility of those proposes a good opportunity for newly planed plants. Here, a pilot study was conducted to evaluate the performance of a continuous flow intermittent aeration process (KSDeN^TM process). The influent was collected at the effluent channel of the grit chamber of a large sewage treatment plant. The influent characteristics with standard deviation were 243.2±170.9mg/L for TCOD_cr, 47.5 13.9mg/L for T-N, 8.4±8.3mg/L for T-P and 5.2±1.8 for C/N ratio. Effluent of 1^st sedimentation tank was 208.2±87.6mg/L for TCOD_cr, 35.0±10.3mg/L for T-N, 4.8±1.9mg/L for T-P and 6.1±2.3 for C/N ratio. The average removal efficiencies of TCOD_cr, T-N and T-P were 93.6, 77.0 and 86.4% and effluent TCOD_cr, T-N and T-P concentrations were 12.5, 9.2 and 0.7mg/L respectively, satisfying regulatory limits. Alkalinity deficiency was not observed during the oxic periods, which is one of the special features of an intermittent aeration process. The results showed higher COD, T-N and T-P removal efficiencies and stability with varying influent conditions, compared to other conventional fixed phase nutrients removal processes.
KSDeNTM 공정에서 C/P 비, SRT, 온도 및 질산염 농도가 인 제거에 미치는 영향
김병군,서인석,홍성택,김도군,천상욱 대한상하수도학회 2003 상하수도학회지 Vol.17 No.1
In this study, the effects of C/P ratio, SRT, temperature and nitrate concentration on the phosphorus removal efficiency of KSDeN™ process (KOWACO-Ssangyong DeNutrient process) was investigated with a pilot plant, which is fed with the grit chamber effluent of 'J' MWWTP (Municipal Wastewater Treatment Process). During the operating period, T-P removal efficiency was more than 80% at C/P ratio (TCOD_Cr/T-P ratio) of 35 or above, and it was higher at relatively low temperature and high C/P ratio. At SRT (Sludge Retention Time)'s of 3-28 days, phosphorus removal efficiency increased up to 90% until the SRT reached 20 days. The phosphorus removal efficiency decreased rapidly with more than 20 days of SRT, which showed that the optimal SRT is 20 days for the T-P removal of KSDeN™ process. Effluent T-P concentration increased with increasing temperature. It is considered that the competition on organic compounds between PAOs (Phosphorus Accumulating Organisms) and denitrifiers resulted in lowering T-P removal by activating nitrifiers at 15℃ or above. The release of phosphorus was influenced by nitrate concentration in anaerobic/anoxic tank. When the nitrate concentration was higher than 2 ㎎/L, the release of phosphorus was disturbed by denitrifiers. SCOD and PO^3-_4-P profile with each reactors of KSDeN™ process showed typical behavior of phosphorus release and luxury uptake by PAOs.
건식법에 의한 폐PCBs와 자동차 폐촉매로부터 동시 귀금속 농축 회수 공정개발
김병수,이재천,서승필 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.6
In the world large amount of used printed circuit boards (PCBs) and spent autocatalysts which contain precious metals have been emitted. However, processes which can recover the precious metals simultaneously from them have not been developed yet. In this study a new process for recovering the precious metals contained in the used PCBs and spent autocatalyst by a pyrometallurgical process simultaneously was developed. The distinguish of that is to use copper, tin, and iron contained in the used PCBs as collector metals of the precious metals contained in the used PCBs and spent autocatalysts. Advantages of the process suggested are simply and economic compared with the previous processes which could recover the precious metals from the used PCBs and spent autocatalysts, respectively. Using the suggested process the precious metals such as Au, Pd, and Pt contained in the used PCBs and spent autocatalyst could be recovered up to 95 % in Cu alloy phase.