고온수성가스전이반응 적용을 위한 Cu-CeO₂-MgO 촉매의 제조방법 최적화

전이정,김창현,심재오,I-Jeong Jeon,Chang-Hyeon Kim,Jae-Oh Shim 한국청정기술학회 2023 청정기술 Vol.29 No.4

최근 탄소중립과 관련하여 연소 시 이산화탄소 배출이 없어 청정한 수소에너지에 대한 관심이 증가하고 있다. 이에 따라 수소 생산에 관련된 연구가 계속되고 있으며 본 연구에서는 폐기물을 처리함과 동시에 고순도 수소를 생산하기 위해 폐기물 유래 합성가스를 수성가스전이반응에 적용하였다. 마그네슘을 세륨과 함께 지지체로 사용하여 고온수성가스전이(HT-WGS)반응에서 촉매의 활성을 향상시키고자 하였다. HT-WGS 반응의 활성물질로 구리를 사용해 Cu-CeO₂-MgO 촉매를 제조하였으며, 제조방법에 따른 촉매활성 연구를 진행하였다. HT-WGS 반응 결과 함침법으로 제조된 Cu-CeO₂-MgO 촉매가 가장 높은 활성을 보였으며, 이는 가장 높은 산소 저장능과 많은 활성 Cu 종을 가지는 특성에 기인한 결과이다. Recently, there has been a growing interest in clean hydrogen energy that does not emit carbon dioxide during combustion due to the increasing focus on carbon neutral. Research related to hydrogen production continues, and in this study, we applied waste-derived synthesis gas to the water-gas shift reaction to simultaneously treat waste and produce high-purity hydrogen. To enhance catalytic activity in the high-temperature water-gas shift (HT-WGS) reaction, magnesium was used as a support material alongside cerium. Cu-CeO₂-MgO catalysts were synthesized, with copper acting as the active component for the HT-WGS reaction. A study on the catalytic activity based on the preparation method was conducted, and the Cu-CeO₂-MgO catalyst prepared by impregnation method exhibited the highest activity in the HT-WGS reaction. The observed superior performance of the Cu-CeO₂-MgO catalyst prepared through the impregnation method can be attributed to its significantly higher oxygen storage capacity and amount of active Cu species.

자궁경부 세포검사에서 임신과 관련된 세포학적 변화

전이경,장회숙,김혜선,홍성란,최종순,박지영,조정숙,성석주,양재혁,김희숙,Chun, Yi-Kyeong,Jang, Hoi-Sook,Kim, Hye-Suu,Hong, Sung-Ran,Choi, Jong-Sun,Park, Ji-Young,Cho, Jung-Sook,Seong, Seok-Ju,Yang, Jae-Hyug,Kim, Hy-Sook 대한세포병리학회 2004 대한세포병리학회지 Vol.15 No.2

Due to insufficient clinical information, most cervicovaginal smears from pregnant or postpartum women have been screened without regard to pregnancy-related cytological changes. Here, we have reviewed 116 abnormal cervicovaginal smears from 103 pregnant and postpartum women. Initial cytological diagnoses revealed the following: 9 cases of high-grade squamous intraepithelial lesions (HSIL), 8 cases of low-grade squamous intraepithelial lesions (LSIL), 85 cases of atypical squamous cells of undetermined significance (ASCUS), and 14 cases involving atypical glandular cells of undetermined significance (AGUS). 31 cases upon review, involved pregnancy-related cytological changes, comprising 25 cases of decidua cells, 4 cases of Arias-Stella reaction, and 2 cases of cedidual cells coupled with Arias-Stella reaction. Interpretation errors were detected in 14 cases: 13 cases of decidual cells interpreted as either ASCUS favor reactive or ASCUS ruled out HSIL, and one case of Arias-Stella reaction was interpreted as ASCUS ruled out HSIL. Decidual cells and degenerated glandular cells with Arias-Stella reaction can result in diagnostic mistakes. In order to avoid misdiagnosis and unnecessary surgeries, both clinicians and pathologists must be aware of the pregnancy-related cytological changes. The clinician should also always inform the pathologist on the pregnancy status of the patient.

치매노인가족의 부양부담 요인에 관한 연구

전이호 ( Lee Ho Jeon ),이종화 ( Jong Hwa Lee ),임시덕 ( Shi Duk Lim ),김재도 ( Jae Do Kim ),김병식 ( Byung Sik Kim ),강보선 ( Bo Seon Kang ) 한국노인의료복지학회 2012 노인의료복지연구 Vol.4 No.2

This study selected 3 geriatrics hospitals where are in Daegu and Gyeongbuk Region for researching an effect of a main provider who bears the load of bring up a demented person, conducted a survey to the adult children who bears mainly the elderly who has got hospital treatment. The social workers of those hospitals were trained and then sent to hospital after. They conducted a survey to a main adult children provider under cooperation of each hospital for this study from 7th of September to 30th of October, 2011. They were asked to self-administration on the survey and were interviewed if it is possible. The questionnaires were distributed to all 150 and collected 128 for the final analysis. This article calculated the frequency analysis, a percentage, the average and the standard deviation with the data collected, conducted the correlation analysis of the independent sample T-test and ANOVA and Pearson by computing Cronbach``s α factor for verifying reliability of testing tool. So the conclusion is as follows: First, when a dependent entered to hospital, there was relatively lower burden of supporting in a main provider. This is the result while the need of service, instrumental supporting such as care for a dependent has been decreasing, the economical and emotional supporting becomes more important. Also, it is that the economic burden has been declined as the rate which brothers and sisters in cooperation bear medical expense has been increasing. Second, especially, there was a higher effect on the dementia degree among the factors which have an effect on a burden of supporting of a main provider. Especially, in the case of a provider for this study, when a dependent has been accompanying with various physical disease or reaching to a severely step, there was higher burden in the circumstance that needs a comprehensive medical treatment rather than a simple care.

클라우드 기반 원자력 부품관리에 관한 연구

전이현 ( Lee Hyun Jean ),김창수 ( Chang Soo Kim ) 한국정보처리학회 2013 한국정보처리학회 학술대회논문집 Vol.20 No.1

최근 원전 사고가 다양한 방향으로 발생되고 있고, 또한 원자력 부품 관리는 그 어느 때 보다 중요한 관심사이다. 원전의 작은 부품 하나로 문제가 발생할 경우 치명적인 결과가 나타날 수 있다. 이러한 관점에서 본 연구는 원전 부품에 대해 기존의 NFC(Near Field Communication) 태그 정보를 기반으로 전체 공정에 대해 클라우드 기반의 관리 방법에 대해 연구하였다. 클라우드 기반을 활용한 것은 원전 제품의 안전성을 좀 더 확보하기 위한 방법으로 고려하였다.

유방의 수질암종의 세침흡인 세포학적 소견 - 1예 보고 -

전이경,고일향,Chun, Yi-Kyeong,Ko, Ill-Hyang 대한세포병리학회 1994 대한세포병리학회지 Vol.5 No.1

Medullary carcinoma (MC) of the breast is an uncommon histologic form of infiltrating ductal carcinoma and the cytologic features of MC are not well delineated. We recently experienced a case of fine needle aspiration cytology of MC of the breast. The characteristic cytopathologic features were cellular aspirate consisting of large, pleomorphic cells in background of many single to clusters of lymphocytes.

Absence of the Septum Pellucidum Associated with a Midline Fornical Nodule and Ventriculomegaly: A Report of Two Cases

전이경,김혜선,홍성란,지제근 대한의학회 2010 Journal of Korean medical science Vol.25 No.6

We report two autopsy cases that revealed the partial absence of the septum pellucidum with ventriculomegaly. In each case, the brain showed mild dilatation of both frontal horns of the lateral ventricles, normal third and fourth ventricles and no aqueductal stenosis. The posterior portion of the septum pellucidum was absent and the fornices were fused in a single midline nodule, abnormally displaced to a caudal position and lodged in the foramina of Monro. The brain base showed no apparent abnormalities;the optic nerves were well developed. We conclude that the caudally displaced fornix in the absence of the septum pellucidum may have intermittently obstructed the foramina of Monro and induced mild ventriculomegaly.

자궁경부 세포검사에서 비정형 선세포의 조직학적 상관성

전이경,홍성란,김혜선,김지영,김희숙 대한병리학회 2009 Journal of Pathology and Translational Medicine Vol.43 No.5

Background : The study evaluated the histologic correlation and clinical significance of atypical glandular cells (AGC) detected either on conventional smears (CS) or liquid-based cytology (LBC). Methods : Two hundred and seventy-seven (0.11%) of 261,925 cervical smears were interpreted as AGC by the Bethesda system 2001 from January 2006 to December 2008. Cytohistological correlation was performed on 192 cases. Results : The prevalence of AGC was 0.07% and 0.13% for CS and LBC smears, respectively. Distribution of AGC subcategories were as follows: atypical endometrial cells 53.8%, atypical endocervical cells 22.7%, atypical glandular cells 19.5%, atypical endocervical cells favoring neoplasia 2.2%, and atypical glandular cells favoring neoplasia 1.8%. Fifty-nine (27.4%) of 192 patients were confirmed as having clinically significant lesions comprising endometrial adenocarcinoma (12.5%), endometrial hyperplasia (6.0%), cervical adenocarcinoma (2.3%), high-grade squamous intraepithelial lesion (HSIL) (1.9%), low-grade SIL (1.9%), adenocarcinoma in situ (1.4%), or ovarian metastasis (1.4%). Conclusion : Compared with CS, LBC was presently associated with a higher prevalence of AGC. Histologic follow-up showed a very low HSIL rate compared to other studies. Endometrial adenocarcinoma was the most common malignant lesion detected because of increasing prevalence of endometrial adenocarcinoma, concentration on endometrial cytology, and introduction of LBC.

자궁경부 세포진에서 인유두종바이러스감염과 폐경후 편평세포 비정형성과의 연관성

전이경,문인걸,홍성란,김혜선,최종순,박지영,박종숙,김태진,김희숙,Chun, Yi-Kyeong,Moon, In-Gul,Hong, Sung-Ran,Kim, Hye-Sun,Choi, Jong-Sun,Park, Ji-Young,Park, Jong-Sook,Kim, Tae-Jin,Kim, Hy-Sook 대한세포병리학회 2004 대한세포병리학회지 Vol.15 No.2

Postmenopausal squamous atypia (PSA) is a phenomenon characterized by cellular alterations mimicking condyloma in the uterine cervix of postmenopausal women. It is not associated with human papillomavirus (HPV) infection. The aim of this study is to correlate findings with HPV infection and the cytohistologic findings of PSA. Eighty-three smears from postmenopausal women, initially interpreted as ASCUS and low-grade squamous intraepithelial lesions(LSIL), were reviewed according to the criteria of PSA. Fifty-eight cases were subsequently reclassified as PSA. Forty cases categorized as PSA were available for HPV-DNA detection by a nested polymerase chain reaction. Eight of these 40 cases(20%) showed biopsy-proven LSIL lesions. The HPV-DNA was detected in 42.5%(17/40), compared to 25%(5/20) of control cases. The HPV-DNA detection rate of biopsy-proven LSIL was 62.5%(5/8). It has been concluded that cytologic differential diagnosis of PSA from LSIL is difficult due to because of poor histologic and viral correlation.

자궁내 발달지연과 정상 말기임신 태반에서의 Telomerase 활성도와 MIB-1 및 Fas, Fas Ligand 발현차이에 관한 연구

전이경,홍성란,양문호 대한병리학회 2005 Journal of Pathology and Translational Medicine Vol.39 No.1

Background : The placenta from a pregnancy that is complicated by intrauterine growth retardation (IUGR) tends to be smaller than that from a normal pregnancy. To investigate this difference, we analyzed the telomerase activity, the proliferative activity and the mRNA levels of apoptosis mediators in placentas. Methods : In 20 placentas from normal third-trimester pregnancies and 22 placentas form pregnancies that were complicated by IUGR, the telomerase activity was detected by a telomeric repeat amplification protocol assay. The proliferative activity was assessed by immunohistochemical staining using the MIB-1 monoclonal antibody. The expression of the apoptosis mediator was evaluated by semi-quantitative reverse transcription-polymerase chain reactions for fas and fas ligand. Results : Telomerase activity was detected in 2 (10%) of 20 normal placentas, whereas it was not observed in all tested 13 placentas that were associated with IUGR. The proliferative activity was significantly low in the placentas that were associated with IUGR (7.44 2.96%), compared with the normal placentas (11.0 3.48%, p=0.002). There was no statistically significant difference in the mRNA levels of fas or fas ligand between two groups. Conclusions : Low telomerase and proliferative activities in the placenta may play a role in the pathogenesis of IUGR.

Arthrocentesis를 통한 비정복성 관절원판 변위 환자의 치료에 대한 증례보고

전이선,전양현,홍정표 대한안면통증∙구강내과학회 2004 Journal of Oral Medicine and Pain Vol.29 No.1

The patients in this case report complained that they had felt a pain and restricted mobility during mandibular movement. Routine clinical and radiographic examination supported their symptoms. So we have diagnosed that they were disc displacement without reduction, tendinitis on temporomandibular ligament and myofascial pain on masticatory muscles and used to plan reversible treatments. But when the patients does not react to these treatments, we have to decide to employ arthrocentesis for these patients. After arthrocentesis was applied, significant effects were appeared in pain relief and correction of restricted mobility. And the effect was raised by intra-capsular medication with sodium hyaluronate. Moreover this treatment make facilitate the process of manipulation. Therefore arthrocentesis is recommended to the patients who have disc displacement without reduction, which does not react to the several reversible treatments. But, further studies and additional data collection will be necessary for practice of arthrocentesis.