이정찬 교수

In this study, alum and natural zeolite were added to a submerged membrane bioreactor (MBR) not only to reduce membrane fouling but also to increase the removal of nitrogen and phosphorus. Alum addition reduced significantly the rising rate of suction pressure and also resulted in stable and better COD removal. Although phosphorus removal was more than 90% by chemical precipitation, nitrification inhibition was observed. With the addition of natural zeolite, membrane permeability was greatly enh

We quantified the influence of the elements of the extracorporeal oxygenation (ECMO) circuit on drug sequestration by focusing on the interactions between materials and drugs. Tubing of three different brands (Tygon/Maquet/Terumo) and oxygenators of two different brands (Maquet/Terumo) were used. Drugs included dexmedetomidine, meropenem, and heparin, which were dissolved in deionized water. Tubing was cut into approximately 7 cm sections and allowed drug solutions enclosed inside by clamping bo

This study aims to evaluate the drug distribution, tissue concentrations, penetration depth, pharmacokinetic properties, and toxicities after rotational intraperitoneal pressurized aerosol chemotherapy (RIPAC) in pigs. Because relevant medical devices have not been introduced, we developed our prototype of pressurized intraperitoneal aerosol chemotherapy (PIPAC) and RIPAC by adding a conical pendulum motion device for rotating the nozzle. RIPAC and PIPAC were conducted using 150 ml of 1% methyle

Pressurized intraperitoneal aerosol chemotherapy (PIPAC) has been suggested as an alternative option for treating peritoneal carcinomatosis (PC). Even with its clinical advantages, the current PIPAC system still suffers from limitations regarding drug distribution area and penetration depth. Thus, we evaluated the new PIPAC system using a novel prototype, and compared its performance to the results from previous studies related with the current MIP^® indirectly because the system is cu

Our results demonstrated the clinical capability of a smartphone-based urine reagent strip test, and this reader is expected to enable a more rapid and reliable colorimetric test for screening of LE and NIT at the clinical setting and the point of care.

본 연구는 ‘과학 글쓰기’에 대한 기존의 개념을 비판적으로 점검하고, 아울러 과학 텍스트의 특징을 고찰함으로써 대학교 교양 교육으로서의 ‘과학 글쓰기’에 적합한 교육 내용을 제안하고자 한다. 과학 글쓰기란 ‘과학계에서 사용하는 지배적인 논증 방식을 통해 실험 혹은 연구의 과정을 객관화하고 거기서 얻어낸 자료를 통해 결론을 일반화하는 일련의 논증 텍스트를 산출’하는 것이라 할 수 있다. 이는 개념화를 통한 논리의 구축, 수치화 및 추론을 통한 인과성의 강조, 귀납적 방법론에 기초한 배열 방식, 문법적 은유와 피동형 문장의 사용 등 과학계에서 사용하는 지배적인 논증의 방식과 그 논증 방식에 적합한 언어적 형식으로 특징지을 수 있다. 따라서 과학 글쓰기 교육이란 단순히 텍스트의 형식만을 대상으로 하는 것이 아닌 학습자로 하여금 과학적 논증의 방식에 대한 이해, 그러한 논증의 방식을 적용하거나 활용해서 타당한 결론을 도출하도록 하는 논증 과정에 대한 이해, 이러한 논증의 방식을 효과적으로

We discuss the critical points of the functional <TEX>$F_{\lambda,\mu}(J,g)=\int_M(\lambda\tau+\mu\tau^*)d\upsilon_g$</TEX> on the spaces of all almost Hermitian structures AH(M) with <TEX>$(\lambda,\mu){\in}R^2-(0,0)$</TEX>, where <TEX>$\tau$</TEX> and <TEX>$\tau^*$</TEX> being the scalar curvature and the *-scalar curvature of (J, g), respectively. We shall give several characterizations of Kahler structure for some special classes of almost Hermitian manifolds, in terms of the critical points

This letter presents an in silico evaluation method of glucose control protocols for critically ill patients with hyperglycemia. Although various glucose control protocols were introduced and investigated in clinical trials, development and validation of a novel glucose control protocol for critically ill patients require too much time and resources in clinical evaluation. We employed a virtual patient model of the critically ill patient with hyperglycemia and evaluated the clinically investigat

This study examined the treatment efficacy and the damage to the blood during hemoperfusion for treating paraquat poisoning using two blood pump mechanisms. Paraquat-poisoned animal models were prepared. A conventional hemodialysis machine, AK90, with a peristaltic roller pump and a cardiopulmonary support system, T-PLS, with a pulsatile blood pump were used during the animal experiments. A total of 12 dogs were treated with hemoperfusion using a charcoal column. Six dogs were treated with hemop