Hepatic Cirrhosis Occurring in a Young Woodchuck(Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus(WHV)

Kyu-shik Jeong,정원일,Jae-yong Chung,Mi-young An,Chae-yong Jung,Gyoung-jae Lee,Jong-soo Kang,Byeong-cheol Kang,Young-heun Jee,Bruce H Williams,Young-oh Kwon,Da-hee Jeong 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2

Cirrhosis Occurring in a Young Woodchuck (Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus (WHV)Da-hee Jeong, Won-il Jeong, Jae-yong Chung, Mi-young An, Chae-yong Jung, Gyoung-jae Lee1, Jong-soo Kang1, Byeong-cheol Kang2, Young-heun Jee3, Bruce H Williams4, Young-oh Kwon5 and Kyu-shik Jeong*College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea1Shinwon Scientific Co., LTD, Research Institute, Suwon, Korea2Clinical Research Institute, Seoul National University, Seoul 110-744, Korea3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea

RETRACTED: Novel photocatalytic activity of vanadium-doped tantalum nitride sensitized/protected by polyaniline for efficient visible light water splitting

Pham, Thanh-Dong,Lee, Byeong-Kyu,Nguyen, Van Noi,Dao, Van-Duong Elsevier 2017 Journal of catalysis Vol.352 No.-

<P>This article has been retracted: please see Elsevier Policy on Article Withdrawal (<U>https://www.elsevier.com/about/our-business/policies/article-withdrawal</U>).</P><P>This article has been retracted at the request of the Editor, after consultation with the corresponding author Professor Byeong-Kyu Lee due to the methods described in the paper for the preparation of the catalysts being incomplete and the results not being reproduced. This was brought to the editors’ attention via a letter to the editor. Professor Lee agreed that the methods description was not complete and agreed with this course of action. <Journal of catalysis, 352 (2017) 13 – 21>, http://dx.doi.org/10.1016/j.jcat.2017.04.024.</P>

급성기 피질하부 뇌경색에서 확산강조 자기공명영상과 관류 자기공명영상의 임상적 유용성

이승한,김병채,최성민,김명규,서정진,조기현 全南大醫大 2001 전남의대학술지 Vol.37 No.3

소형전기로를 이용한 플라스틱류 소각시 발생하는 VOCs 농도분석

이병규,김행아 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.6

This study analyzed concentrations of volatile organic compounds (VOCs) produced from incineration of plastic wastes at 600℃ The plastic wastes used in this study included polyethyleneterephthlate (PETE), high density polyethylene (HOPE), polyvmyl chloride (PVC), low density polyethylene (LOPE), polypropylene (PP), polystyrene (PS) and other Plastic wastes were heated from room temperature upto 600°C providing the compressed air inside of a small-cale electric furnace for 90 minutes and then they were oxidized (incinerated) for 60 minutes at 600℃ maintaining the same air supply VOCs emitted from the incineration process were sampled using an air sampling pump and Tedlar air bags for 150 minutes and then the components and concentrations of the VOCs were analyzed by a GC-MS The most prominent chemical structure of the VOCs obtained from the Incineration process of the HOPE, LDPE and PP, which Include ethylene groups In their main chains, was identified as aliphatic hydrocarbons such as l-hexcne However, aromatics such as benzene were major chemical structure from the Incineration of PETE, PVC and PS which include benzene lings in their main chains This study estimated the total VOC production from the incineration of the plastic wastes based on the real plastic waste production and the emission factors 64% and 27% of the total vac emissions consisted of aliphatic hydrocarbons and aromatics, respectively, which have double bonds within their molecular structure and thus a high ground level ozone formation potential

12주간 축구훈련이 정신지체아의 심박수에 미치는 영향

이창규,김병완,현광석,조병준 대전대학교 기초과학연구소 1997 自然科學 Vol.8 No.1

12주간의 축구훈련이 정신지체아의 심박수에 미치는 영향을 알아보기 위하여 훈련되지않은 14명의 정신지체 남자 중학생들을 각 7명씩 축구훈련군과 비교군으로 나누었다. 훈련군은 최대심박수의 62.7%의 강도로 1일에 30분씩의 축구훈련을 1주에 3일의 빈도로 12주 동안 실시하였다. 트레드밀에서의 런닝 중에 나타나는 심박수의 반응을 12주간의 훈련 준후에 각각 측정하였다 12주간의 축구훈련 후에 트레드밀 런닝의 각 단계에서 정신지체 남자 중학생의 심박수가 유의하게 감소했으며 특히 트레드밀에서의 런닝 5분 경과시에는 훈련 전 152bpm에서 훈련 후에는 129.8bpm으로 현격한 감소를 나타냈다. 최대심박수의 50-70% 정도의 강도로 훈련을 실시하는 것이 정신지체 남자중학생들에게는 안전하고 효율적인 것으로 나타났다. The purpose of this study was to identify the effects of 12 weeks of soccer training. on heart rate in mentally retarded children. Fourteen untrained middle school boys were randomly selected and divided into 2 groups, exercise group(N=7) and non-exercise group(N=7). The exercise group had 30 minute-soccer training 3 days a week with intensity of 62.7% of HR? for 12 weeks. The heart rate responses to treadmill running were measured before and after 12 weeks of soccer training. The data were tested(p<.05) with paired t-test and independent t-test. The heart rate responses were improved significantly when mentally retarded boys were subjected to 12 weeks of soccer training. It is recommended to use exercise intensity within moderated range (50%-70% HR?) for mentally retarded boys.

세포질내 정자주입법(ICSI)에 있어서 정자흡입 및 난자내 주입방법에 관한 연구

이택후,김항진,송건호,김대근,전상식,박윤규,서태광,전병균,류은경,이은숙,문진수,김광철 경북대학교 의학연구소 2000 경북대학교병원의학연구소논문집 Vol.4 No.1

Study on Method of Sperm Aspiration and Injection into an Oocyte in Intracytoplasmic Sperm Injection(ICSI) Immobilization of spermatozoa prior to intracytoplasmic sperm iniection(ICSI) sometimes results in crooked tail and this makes it difficult to aspirate sperm into an injection pipette tail first. Head-first sperm aspiration into an injection pipette avoid this problem due to the bigger size of the sperm head. The effect of head or tail-first sperm injection into an oocyte on fertilization cleavage, percentage of grade I embryos and development to blastocyst stage in ICSI program has been studied. A single living immobilized spermatozoa from oligoasthenozoospermic patient was injected into an oocyte head-first or tail-first according to the treatment. Eighteen hours after microinjection, oocytes ware inspected for survival and fertilization Fertilized oocytes with two pronuclei were cultured in 30μl drop of mHTF supplemented with 10% heat-inactivated follicular fluid(FF) at 37℃. On day 2. embryo transfer was performed with cleaved embryos. The remaining 2-8 cell stage embryos were co-cultured with BRL cells in mHTF + 10% FF for 72 hours and the developmental stage was observed. The data were analyzed by Analysis of Variance. A total of 164 oocytes from 36 cycles were assigned to earth treatment and ICSI was performed(88 head-first, tail-first). The rates of normal fertilization were 81.8% and 76.3% for head-first and tail-first, respectively. Of the fertilized oocytes, the percentage of cleaved embryos and the percentage of grade 1 embryo among cleaved embryos were 88.9% and 68.8%, 93.1% and 74.1% for head-first and tail-first, respectively. Of the 2-8 cell embryos cultured, 44.4%(16/36) and 50.0%(10/20) for head first and tail first, respectively developed to blastocyst stage. There were no differences in fertilization, cleavage, rates of grade 1 embryos, and development to blastocyst stage. In conclusion, head-first or tail-first sperm injection into an oocyte in ICSI program does not affect fertilization and subsequent embryo development to blastocyst stage in vitro.

분화 갑상선암 환자의 수술후 잔여갑상선조직 및 전이병소의 진단 : Tc-99m Pertechnetate 스캔과 고용량 옥소 치료 후 I-131 스캔의 비교 Comparison between Tc-99m Pertechnetate Scan and High Dose I-131 Therapy Scan

이주령,안병철,정신영,이재태,이규보 대한핵의학회 2003 핵의학 분자영상 Vol.37 No.2

목적 : 갑상선 절제술을 받은 분화 갑상선암 환자의 경우 잔여 갑상선 조직이나 전이 병소를 찾기 위해서는 진단적 I-131 스캔이 주로 사용되고 있으나, I-131 스캔은 갑상선 호르몬 중지가 필요하고, 방사성 옥소 투여후 2~3일에 영상을 얻어야 하며, 기절 현상이 발생할 수 있다는 점 등의 단점이 있다. 이에 비하여 Tc-99m 스캔은 검사가 용이하고 영상의 질이 좋아 진단적 I-131 스캔을 대체할 수 있을 지에 대한 논란이 있다. 이에 저자들은 고용량 방사성옥소 치료 후 시행한 I-131 스캔을 기준으로 하여 치료전 시행한 Tc-99m 스캔의 진단성능을 알아보고자 하였다. 대상 및 방법 : 갑상선 절제술을 받은 분화 갑상선암 환자 135명을 대상 (여: 114, 연령: 45±15.3세)으로 하였고, 방사성옥소 치료 병력이 있는 환자는 23명 (1회 16명, 2회 4명, 3회 3명)이었다. 갑상선 호르몬 복용을 4주간 중단한 후 370 MBq의 Tc-99m pertechnetate를 정맥주사 한 20분 후에 전경부의 평면 및 바늘구멍 Tc-99m 스캔 영상을 얻었고, 3.7~7.4 GBq의 I-131 옥소를 경구 복용한 3일 후 전경부 평면 및 바늘구멍 I-131 스캔 영상을 얻었다. Tc-99m 스캔과 I-131 스캔은 최대 7일 간격이내에 시행되었다. 영상의 판독은 두명의 핵의학 전문의가 함께 합의에 의하여 시간적으로 섭취여부 및 섭취부위의 개수를 구하였다. 결과 : 대상 환자 모두는 혈청 TSH는 30㎖U/L 이상으로, 갑상선 기능저하증 상태에 있었다. 전체 환자 135명 가운데 65명 (48.1%)에서 Tc-99m 스캔과 I-131 스캔이 불일치 소견을 보였다. 두 스캔사이에 불일치를 보인 환자 가운데 23명 (35.4%)은 Tc-99m 스캔에서는 전경부 방사능 섭취부위가 발견되지 않았으나 I-131 스캔에서 옥소 섭취부위가 발견된 경우이며, 42명 (64.6%)은 Tc-99m 스캔보다 I-131 스캔에서 전경부옥소 섭취부위가 더 많이 발견되었다. 방사성 옥소치료병력이 없는 환자 112명 가운데 51명 (45.5%)은 Tc-99m 스캔과 I-131 스캔이 불일치 소견을 보였다. 이들 가운데 Tc-99m 스캔에서 전경부 방사능 섭취부위가 발견되지 않았던 11명 가운데 9명 (81.8%)은 I-131 스캔에서 옥소 섭취부위가 발견되었다. 수술후 방사성옥소 치료를 받은 병력이 있는 전체 23명은 Tc-99m 스캔상 전경부 섭취부위가 발견되지 않았으나, 이들 중 14명 (60.9%)은 I-131 스캔에서 전경부의 옥소 섭취부위가 나타났었다. 결론 : 이상의 결과로 보아 분화 갑상선암 환자의 수술후 잔여 갑상선조직이나 전이병소를 평가시 Tc-99m 스캔은 고용량의 방사성 옥소 치료후 얻은 I-131 스캔을 기준으로 볼때 진단적 예민도가 낮았으며, 특히, 방사성 옥소 치료병력을 가진 환자의 경우, 진단적 유용성이 없는 것으로 생각된다. Purpose : To evaluate diagnostic sensitivity of nuclear imaging in the detection of residual thyroid tissue and metastatic lesion, we have compared neck scintigrams with Tc-99m pertechnetate (Tc-99m scan) and high dose I-131 iodide (I-131 scan) in patients with differentiated thyroid cancer. Subjects and Methods : One hundred thirty-five thyroidectomized patients for differentiated thyroid cancer were enrolled in this study. Twenty-three had a previous history of radioiodine Therapy. Planar and pin-hole images of anterior neck with Tc-99m were acquired at 20 minutes after injection, followed by I-131 scan three days after high-dose radioiodine therapy within 7 days interval. Patients were asked to discontinue thyroid hormone replacement more than 4 weeks. Results : All subjects were in hypothyroid state. Seventy out of 135 patients (51.9%) showed concordant findings between Tc-99m and I-131 scans. I-131 scan showed higher number of uptake foci in all of 65 patients showing discordant finding. Tc-99m scan showed no thyroid bed uptake in 34 patients, whereas 23 of them (67.6%) showed bed uptake in I-131 scan. Tc-99m scan did not show any uptake in thyroid bed in 11 or 112 patients without previous history of radioiodine therapy, but 9 of them showed bed uptake in I-131 scan. Tc-99m scan showed no bed uptake in all of the 23 patients with previous history of radioiodine therapy, in contrast 14 of them (60.9%) showed bed uptake in I-131 scan. Conclusion : These results suggest that Tc-99m scan has poor detectability for residual thyroid tissue or metastatic lesion in thyroidectomized differentiated thyroid cancer patients, compared to high dose I-131 therapy scan. Tc-99m scan could not detect any remnant tissue or metastatic lesion in patients with previous history of radioiodine treatment, especially.

복합레진 수복 시 재접착 술식이 미세누출에 미치는 영향

이미애,서덕규,손호현,조병훈 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.3

복합레진 수복시, 일반적으로 연마, 산부식, 수세 및 건조 단계를 거쳐 저점도 레진을 적용하는 재접착 술식을 통해 예상되는 수축간극을 봉쇄한다. 그러나, 이 과정은 재접착제 적용 이전에 물이나 잔사가 간극을 매워버릴 수 있어 그 효과가 의심된다. 본 실험에서는 연마 단계 이전, 즉 복합레진을 중합한 직후에 재접착제를 도포한다면 변연누출을 더 줄일 수 있을 것이라는 가설을 검증하고자 하였다. 실험을 위해 35개의 발거한 대구치에서 협면과 설면에 교합면 변연은 법랑질에, 치은측 변연은 상아질에 위치하는 5급 와동을 형성하였다. 와동은 Z250 (3M ESPE, USA)로 충전하였고, 접착제로는 AdperTM Single Bond 2(3M ESPE)을 사용하였다. 재접착제로는 Biscover LV (Bisco, USA) 레진 전색제와 ScotchBond Multi-purpose system(3M ESPE)의 접착제, 및 점도가 낮은 실험용 접착제를 연마 전 또는 일련의 연마 및 산부식 후 수복물의 변연에 적용하였다. 2% 메틸렌 블루 용액에 네 시간 동안 침적한 뒤 교합측 및 치은측 변연에서의 색소 침투 깊이를 광학 입체 현미경으로 측정하였다. 재접착제의 점도와 변연미세누출의 상관관계도 평가하였다. 재접착 술식, 재접착제, 및 변연의 위치, 그 각각에서는 통계적으로 유의한 차이를 관찰할 수 없었다. 그러나, 재접착 술식을 시행하지 않은 대조군의 경우에는 세 가지 재접착제를 사용한 재접착군에 비해 치은측 변연에서 미세누출이 통계적으로 유의하게 크게 나타났다(p < 0.05). 대조군과 재접착군의 미세누출의 차이는 교합측 변연에서는 관찰되지 않았다. 연마 및 산부식 후 치은변연에 재접착제를 적용한 경우에서 약한 음의 상관관계(r = -0.326, p = 0.041)를 보인 경우를 제외하고는, 재접착제의 점도와 미세누출은 유의한 상관관계를 보이지 않았다. During a composite resin restoration, an anticipating contraction gap is usually tried to seal with low-viscosity resin after successive polishing, etching, rinsing and drying steps, which as a whole is called rebonding procedure. However, the gap might already have been filled with water or debris before applying the sealing resin. We hypothesized that microleakage would decrease if the rebonding agent was applied before the polishing step, i.e., immediately after curing composite resin. On the buccal and lingual surfaces of 35 extracted human molar teeth, class V cavities were prepared withthe occlusal margin in enamel and the gingival margin in dentin. They were restored with a hybrid composite resin Z250 (3M ESPE, USA) using an adhesive AdperTM Single Bond 2 (3M ESPE). As rebonding agents, BisCover LV (Bisco, USA), ScotchBond Multi-Purpose adhesive (3M ESPE) and an experimental adhesive were applied on the restoration margins before polishing step or after successive polishing and etching steps. The infiltration depth of 2% methylene blue into the margin was measured using an optical stereomicroscope. The correlation between viscosity of rebonding agents and mciroleakage was also evaluated. There were no statistically significant differences in the microleakage within the rebonding procedures, within the rebonding agents, and within the margins. However, when the restorations were not rebonded, the microleakage at gingival margin was significantly higher than those groups rebonded with 3 agents (p < 0.05). The difference was not observed at the occlusal margin. No significant correlation was found between viscosity of rebonding agents and microleakage, except very weak correlation in case of rebonding after polishing and etching at gingival margin (r = -0.326, p = 0.041).

골수 이식을 받은 만성 골수성 백혈병 환자의 Tc-99m MDP 골스캔에서 우연히 발견된 비장 Hemochromatosis

안병철,서지형,배진호,정신영,이재태,이규보 대한핵의학회 2004 핵의학 분자영상 Vol.38 No.1

Purpose: Tc-99m MDP bone scan was performed to evaluate a generalized bone pain in a 24-year-old male chronic myelogenous leukemia patient who received bone marrow transplantation at 7 months ago. The patient had received large amounts of blood transfusion for managing symptoms related to anemia. Bone scan revealed substantial splenic tracer uptake. Magnetic resonance image and laboratory evidence of hemochromatosis suggests that the presence of large quantities of iron in the spleen of this patient may have been responsible for the splenic uptake of the bone scanning agent. The authors report a case of splenic hemochromatosis incidentally found on Tc-99m MDP bone scan.

데이터 마이닝을 이용한 CRM 연구

김규곤,이동철,이병칠 동의대학교 경제경영전략연구소 2003 經濟經營硏究 Vol.1 No.1

Recently, enterprises were concerned about the relationship marketing for getting a powerful competitiveness, as the managerial environments were changing from mass marketing in the 1970s to recognizing the importance of customer in a turbulent market in the mid-1980s. There appeared CRM(customer relationship management) as an important method for satisfying the customer. Especially, it was important issue for companies the keeping of existing customer for long time in a competitive environment. In this paper, it is used general multivariate analysis methods and data mining analysis methods such as discriminant analysis, logit model, decision tree analysis, and neural networks. Also, it is tried to find the most efficient model of the data mining analysis in insurance CRM. In addition, it is analyzed and verified the most agreeable model of the data mining estimation about the secession of customers in an insurance company. Finally, effective marketing strategies and some tasks on this issue hereafter based on the results were suggested.