Development and Performance Test of an Equipment for a Selective Separation of Paraffin From the Paraffin Solidification Product Using the Vacuum Evaporation and Condensational Deposition Recovery Method

Tae-Yang Noh,Beom-Hee Lee,Byeong-Mok Park1,Ah-Ran Cha,Hee-Chul Yang 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2

Nuclear power plants in Korea stores approximately 3,800 drums of paraffin solidification products. Due to the lack of homogeneity, these solidification products are not allowed to be disposed of. There is therefore a need for the separation of paraffin from the solidification products. This work developed an equipment for a selective separation of paraffin from the solidification product using the vacuum evaporation and condensational recovery method in a closed system. The equipment mainly consists of a vacuum evaporator and a condensational deposition recovery chamber. Nonisothermal vacuum TGAs, kinetic analyses and kinetic predictions were conducted to set appropriate operation conditions. Its basic operability under the established conditions was first confirmed using pure paraffin solid. Simulated paraffin solidification product fixing dried boric acid waste including nonradioactive Co and Cs were then fabricated and tested for the capability of selective separation of paraffin from the simulated waste. Paraffin was selectively separated without entertainment of Co and Cs. It was confirmed that the developed equipment could separate and recover paraffin in the form of nonradioactive waste.

Peroxiredoxin V Regulates Aco2, Acadm, and Acox1 Activity in Hypoxic Kidney

Tae‐Hoon Lee,Hee‐Young Yang,Joseph Kwon,Hoon‐In Choi,Lina Ren,Ung Yang,Byung‐Ju Park,Zae Young Ryoo 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1

Peroxiredoxin V, an atypical thioredoxin peroxidase, is widely expressed in mammalian tissues. In addition, Prdx V is localized in mitochondria, peroxisome, cytosol, and nucleus. Prdx V has been reported to protect a wide range of cellular environments as antioxidant enzyme, and its dysfunctions may be implicated in several diseases, such as cancer, inflammation, and neurodegenerative disease. Identification and relative quantification of proteins affected by Prdx V may help identify novel signaling mechanisms that are important for oxidative stress response. However, the role of Prdx V in the modulation of hypoxia‐related cellular response is not studied yet. In order to examine the function of endogenous Prdx V in hypoxic condition in vivo, we generated a transgenic mouse model with Prdx V siRNA expression controlled by U6 promoter. Of many tissues, the knockdown of Prdx V expression was displayed in kidney, lung, and liver, but not spleen and skin. We conducted on the basis of nano‐UPLC‐MSE proteomic study to identify the Prdx V‐affected protein networks in hypoxic kidneys. In this study, we identified protein networks associated with oxidative stress, fatty acid metabolism, and mitochondrial dysfunction. Our results indicated that Prdx V affected to regulation of kidney homeostasis under hypoxia stress.

A Study on the Functionality of Halophytes from Coast area of Jeollanam-do

Tae-Man Ha,Yang-Joon An,Mi-Yeong Shin,Sook Park,Hak-Jae Park,Hyo-Jeong Kang,Su-Jeong Choi,Jae-Yeong Yu,Ji-Yun Jeon,Gyu-Yeon Oh 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10

This study was undertaken to improve the perceived value of halophytes and contribute to the activity of the local economy by analyzing the antioxidant activity and mineral content of Suaeda japonica, Tetragonia tetragonoides, and Spergularia marina that grow wild on the mud flats and coastal areas. The total phenolic compound content found in each order is as follows: Suaeda japonica (3.674∼5.989 mg TAE/g dry wt.), Tetragonia tetragonoides (2.515∼4.471 mg TAE/g dry wt.), and Spergularia marina (2.450∼4.067 mg TAE/g dry wt.); DPPH radical scavenging and ABTS cation radical scavenging activities were also recorded in the same order. In the case of minerals, Iron(Fe) was relatively high in Suaeda japonica (960.1∼1,346.7 mg/kg), Manganese(Mn) in Tetragonia tetragonoides (197.1∼574.8 mg/kg), and Zinc(Zn) was relatively high in Spergularia marina (63.19∼216.56 mg/kg). It was confirmed that the mineral content of Suaeda japonica, Tetragonia tetragonoides, and Spergularia marina was significantly higher than that of Chinese cabbage, lettuce, leek, and spinach.

조기위암의 임상적 연구

박태준,양은수,류종철,박태군,이희승,신원창,이진호,김관엽 인제대학교 1994 仁濟醫學 Vol.15 No.1

1989년 9월부터 1993년 7월까지 인제대학교 의과대학 상계백병원에서 실시한 위내시경 소견이 조기위암이며 내시경 직시하 생검결과 선암으로 판명되어, 근치적 위절제술을 시행받은 23명의 환자에서 임상적 특징을 알아보고, 문헌고찰과 함께 보고하는 바이다. The incidence and mortality rate of stomach cancer ranks well ahead of all malignancies in Korea. The prognosis is excellent in early gastric cancer of which the overall 5 years survival rate of 85∼95% is comparative with that of advanced gastric cancer of 15∼49%. So early detection with very sensitive mordality of gastroscope and surgery is the only premise to decrease the mortality rate of gastric cancer. This report deals with the clinical aspects of 23 cases of early gastric cancer, which were confirmed with histopathologic examination of resected stomach during the 4 years from September 1989 to July 1993 at Sanggye Paik hospital, Seoul, Korea. Out of 23 cases of early gastric cancer, 14 cases were male, 9 cases were female, and the male to female ratio was 1.6 : 1. The most common type of early gastric cancer was talc type(43.5%), IIc and its combined type comprised most of them(87.0%). The most prevalent sloe of lesion was gastric angle(43.5%) and the most common direction was lesser curvature(73.9%) 19 cases of 23(78.3%) were between 1∼3cm in size, and there was no statistical significance between the size of the lesion and lymph node metastasis. Of the 9 cases with mucosal lesion, there were 2 cases with lymph node metastasis(22.2%), but 7cases(50.0% ) of 14 cases with submucosal lesion presented lymph node metastasis. Diagnostic accuracy of endoscopy on detection of early gastric cancer was 17 cases(73.9%) of total 23 cases in our study. As with other report, histopathulogic examination of resected stomach revealed adenocarcinoma, tubular type as the most common type. Frequent complaint of patients with early gastric cancer was epigastric pain(65.2%), and duration of the symptom was less than 12 months in 17 cases(73.1%) of 23 patients with early gastric cancer.

코일형 곡관에서 층류맥동유동의 전단응력분포

박우룡,유영태,모양우,최주호 順天大學校 1992 論文集 Vol.11 No.1

The characteristics of the shear stress distributionsrare studied theoretically and experimentally for the laminar steady flow and the laminar pulsating flow generated by butterfly valve in the coiled pipes with the curvature ratio of 30. The shear stress distributions are abruptly changed from θ = -60˚~-40˚ in the plane direction. The shear stress distributions for the laminar steady flow and the pulsating flow increase abruptly near the wall.

쾌적한 캠퍼스 조성을 위한 기본계획 기초적 연구

梁富弘,朴碩鉉,崔生吉,孫泰鎭,金基洙 충주대 2003 産業科學論文集 Vol.11 No.-

In this study, the potential energy and limitation of the facility of Chungju national university are analyzed in the respect of human knowledge, nature, and visual environment. In addition, the effctiveness and problem of the existing master plan are evaluated through the investigation on the main hart and development procedure of the previous master plan of CJU. These results are compared and reflected to the plan of Vision 2003, e-STRR2010 and effective campus development plans of CJU are presented.

건축설계 교육을 위한 하이퍼미디어 지원 지능형 교습시스템(ITS)의 적용방법에 관한 연구

박익수,신태양,정성구 호남대학교산업기술연구소 1997 산업기술연구논문집 Vol.4 No.-

본 연구의 최종목적은 하이퍼미디어 기법을 이용하여 건축학과 학생들의 설계교육에 필요한 제이론과 실습과정을 학습할 수 있도록 하이퍼미디어 지원 지능형 교습시스템(ITS)을 개발하는 것이다. 본 논문은 이를 위한 기초단계로서 먼저 건축설계 교육에 있어서 이론적 체계화 하이퍼미디어 지원 교습시스템에 적합한 영역구조를 구상해 보았다. 또한 적용방법의 기술적 환경으로서 CAI와 하이퍼텍스트의 개념과 구성 및 역할을 살펴보았으며, 하이퍼텍스트 개념을 적용한 원형모델을 구축하여 건축설계 교육을 위한 ITS 개발의 방법론적 형태를 고찰하였다. 앞으로 건축설계교육을 위한 ITS의 개발을 위해서는 타당성 검증을 통한 체계적인 건축설계교육안의 개발과 이에 적절한 ITS 프로그램 개발이 연구되어야 할 것으로 본다. The purpose of the study was to develope ITS for architectural design education by applying hypertext concept. For the purposes, this paper was the first step for applying architectural design education, dealed with the applicative method. The researchers trided to idealize the situable domain of architectural design education. Then, the researchers studied the concept of CAI and the composition of hypertext, moreover studied the applicative method for ITS development and built a prototype model to apply hypertext concept for architectural design education. The research is needed the development of the systamatic education model and the proper ITS program through a inspection of the propriety.

코일형 곡관에서 층류맥동유동의 압력분포

박우룡,모양우,최주호,유영태 順天大學校 1992 論文集 Vol.11 No.1

The characteristic of the pressure distributions are studied theoretically and experimentally for the laminar steady flow and the laminar pulsating flow generated by the butterfly valve in the coiled pipes with the curvature ratios of 7 and 30. The pressure gredient ratios affact with Wormersley numbers, Dean numbers, velocity amplitude ratios and time averaged Reynolds numbers. The pressure gredient ratios of oscillatory components increase according to increasing the Wormersley number and the velocity amplitude ratio.

매립지 복토재로의 재활용을 위한 하수슬러지의 부산석회계 고화재를 이용한 안정화 연구

박태욱,박주양 한양대학교 환경공학연구소 2000 環境科學論文集 Vol.21 No.-

하수처리 과정에서 필연적으로 발생하는 하수슬러지를 부산석회를 혼합하여 개발한 새로운 고화재로 무기화학적으로 처리하여 쓰레기 매립장의 복토재 및 일반 매립재로서의 재활용가능성에 대하여 검토를 하였다. 기존 사용되는 석회계 재료의 단점을 보완하여 보다 경제적이고 안정적인 재료를 개발하였으며, 개발된 고화재에 대하여 고화재 자체 및 혼합개량체에 대하여 여러시험을 실시하였다. 하수슬러지와 혼합하여 개량하고 개량된 인공토의 물성변화 및 역학적특성을 분석 검토하고, 화학적 용출시험을 병행하였다. 시험결과를 복토재료의 시방기준과 규격을 비교하여 재활용 가능성을 검토한 결과 재활용가능한 것으로 분석되었다. A feasibility study was made for recycling sewage treatment sludges into daily cover materials for municipal waste landfills or reclamation fill materials after treament using new stabilization/ solidification binder based on by-product lime from a soda ash producing plant. The new binder was more economical and more stable than the existing lime-based stabilization binder. Various physical and chemical leaching tests were made for raw sewage sludge, new binder material, and sewage sledge treated by the new binder. The treated sewage sludge was concluded to be suitable fur the daily cover material by comparing the test results with required specifications.

産婦人科 患者에서 分離된 Ureaplasma urealyticum의 生物學的 性狀

梁熙燦,崔大卿,張明雄,白太鉉,朴鼎圭 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2

Isolation rates of Ureaplasma urealyticum from vaginal swab of 216 patients, 105 prostitutes and 100 college females was investigated. Also, minimal inhibitory concentration of isolated strains about tetracycline and minocycline was studied. The results were summarized as follows; 1. Out of 70 vaginitis patients, isolation rates of Ureaplasma urealyticum and Mycoplasma hominis were 34.3% and 15.7%, respectively. 2. Out of 54 cervicitis patients, isolation rates of Ureplasma urealyticum and Mycoplasma hominis were 37.0% and 11.0%, respectively. 3. Out of 92 other gynecological patients, isolation rates of Ureaplasma urealyticum and mycoplasma hominis were 44.6% and 16.3%, respectively. 4. Out of 105 prostitues, isolation rates of Ureaplasma urealyticum and Mycoplasma hominis were 54.3% and 75.2%, respectively. 5. Out of 100 college students, isolation rates of Ureaplasma urealyticum and Mycoplasma hominis were 23.0% and 7.0% respectively. 6. In the susceptibility patterns of isolated Ureaplasma urealyticum, resistant strains about tetracycline in patients, prostitues and college students were 75.2%, 73.6% and 69.5%, respectively 7. In the susceptibility patterns of isolated Ureaplasma urealyticum, resistant strains about minocycline in patients, prostitues and college students were 91.7%, 87.7% and 73.9%, respectively.