산부식전 소와 열구 처리법에 따른 치면 열구 전색재의 변연 봉쇄성에 관한 연구

安帥炫,金秀也,白秉周 全北大學校 齒醫學硏究所 1993 전북치대논문집 Vol.11 No.1

The purpose of this study was to evaluate the marginal sealing of pit & fissure sealant according to the treatment of pit & fissure prior to acid etching in permanent premolar & molar. 20 premolars & 30 molars were used for experiment. They were classified into 5 experimental group at random : Group 1 was not treatment and Group 2, 3, 4, 5 were respectively treatment with pumice, small round steel bur of low speed handpiece, pointed diamond bur of high speed handpiece, Murakami R.I. No. 1-2. All the specimens were then thermocycled in a range of 4℃∼54℃ and immersed in 2% methylene blue dye solution for 24 hours and sectioned with low speed diamond cutter into two part under water condition. All the specimens were observed at pit & fissure-sealant interface with light microscope & statistical analysis was performed. The obtained results were as follows ; 1. There were significant increase in marginal sealing of high speed handipiece-pointed diamond bur group in contrast to pumice group at significant level α=0.05 when compared by dye penetration score(P<0.05). 2. There were significant increase in marginal sealing of low speed handpiece-small round steel bur group, high speed handpiece-pointed diamond bur group and Murakami R.I. No 1-2 group in contrast to pumice group at significant level α=0.01 when compared by dye penetration score(p<0.01.) 3. There were significant increase in marginal sealing of low speed handpiece-small round steel bur group, high speed handpiece pointed diamond bur group and Murakami R.I. No. 1-2 group in contrast to pumice bur group and Murakami R.I. No. 1-2 group in contrast to pumice group at significant level α=0.01 when compared by dye penetration length(p<0.01). 4. When compared by dye penetration score, it is lowest in high speed handpiece-pointed diamond bur group and lower in low speed handpiece-small round steel bur group, Murakami R.I. No. 1-2 group, pumice group, no treatment group in sequence. 5. There were better penetration force of pit and fissure sealant in low speed handpiece-small round steel bur group and high speed hdndpiece-pointed diamond bur group than no treatment group, pumice group and Murakami R.I. No. 1-2 group.

매복 상악 중절치와 견치의 외과적 & 교정적 처치에 관한 증례보고

백병주,노용관,김수아 大韓小兒齒科學會 1991 大韓小兒齒科學會誌 Vol.18 No.2

In dental clinics,especially in orthodotic clinics,impacted maxillary canine has many problem in making a diagnosis and treatment plan. In the treatment of the impacted maxillary canine,it should be focused on the determination and elimination of the cause that has led to such a problem,rather than think how to treat it. After elimination of the cause,following treatment procedures can be used:No treatment,Surgical treatment alone,Surgical and Orthodontic treatment,Transplantation. After treatment of impacted canine by above procedures,followings must be considered:plaque control & gingival health,poket depth,cervical bone loss,length of the clinical crown,width of the keratinized mucosa,pulp condition,root resoption & ankylosis,canine position

구강편평세포암종의 유세포분석적 DNA측정을 위한 이중 매개변수법의 적용

백병주,조남표,김재곤,주훈,김수야 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

A series of 31 patients with primary oral squamous cell carcinoma (SCC) who were treated at Chonbuk National university Hospital during the years 1991-1995,were evaluated by dual parameter analysis in flow cytometric DNA measurement,Bryne's malignancy grading system,and the TNM classification.The aims of the present study were to discover that previously undetected aneuploid clones could be detected by dual parameter analysis and to determine the prognostic value of the above parameters. 1.Using dual parameter analysis of cytokenratin and DNA on disintegrated paraffin-embedded samples,aneuploid clones which were undetected by regular single parameter DNA analysis could be found among the cytokenratin-selected cells. DNA aneuploidy from parafin-embedded samples were 15 cases compared with 10 cases using conventional DNA analysis. 2.The portion of aneuploid tumors showed slightly higher clinical stage tumor size than the portion of diploid tumors, but the difference was not significant.The portion of DNA aneuploid tumors showed significantly higher mean mitosis and total malignancy scores than the portion of DNA diploid tumors. 3.The majority of the patients presented with clinical stage Ⅲ and Ⅳ lesions showed showed significantly higher mean total malignancy scores as compared to those with clinical stage Ⅰ and Ⅱ. 4.Histopatholgic mean total malignancy score of the 31 cases was 12.7.Among the histologic parameters,mean mitosis score was correlated to the status of DNA ploidy and total malignancy score were correlated to the DNA ploidy and clinical staging.

광주지역 소아에서 유행한 호흡기바이러스 유행양상 분석

서진종,김민지,김선희,기혜영,정재근,김은선,박종태,김경심,이수야,김명권,정윤석 대한감염학회 2008 감염과 화학요법 Vol.40 No.4

Background : This investigation was to perform the epidemiological surveillance and genetic analysis on respiratory viral agents from children with acute respiratory infections in Gwangju. Materials and Methods : For this study, 3,695 specimens obtained from patients with acute respiratory infections were collected by collaboration with pediatric hospitals in Gwangju between 2005 and 2007. Specimens were screened for 8 respiratory viruses including influenza viruses (IFV), human rhinoviruses (HRV), human coronaviruses (HCoV), adenoviruses (ADV), parainfluenza viruses (PIV), human enteroviruses (HEV), respiratory synthitial viruses (RSV) and human bocaviruses (HBoV). Respiratory viruses were detected using multiplex (RT) PCR with viral specific primers. Results : Out of 3,695 specimens, the ratio of virus detection was 24.9% (919). Overall, HRV (35.5%) and IFV (34.9%) were the most common viruses found, followed by HBoV (14.8%), HCoV (10.6%), RSV (3.7%), ADV (3.4%), PIV (3.2%) and HEV (3.0%). In addition, multiple infections were detected in 80 patients (8.7%). When the prevalence was analyzed according to season, HBoV, IFV and HCoV showed two epidemic points in late spring and early winter. ADV, HRV, RSV PIV and HEV, however, were all found to have only one epidemic point, with RSV being most common during winter and the others being most prominent during spring. Conclusions : Through this epidemiological surveillance, the respiratory viruses prevalent in children in Gwanaju area were investigated. We strongly recommend the development of nationwide policy for the management of prevalent respiratory virus that includes long term collection of data and samples, vaccine development and prevention education of the misuse of antibiotics.

Dynamic analysis of Ca^(2+) level during bovine oocytes maturation and early embryonic development

Su Li Liang,Qian Jun Zhao,Xiang Chen Li,Ya Ping Jin,Yi Peng Wang,Xiao Hua Su,Wei Jun Guan,Yue Hui Ma 대한수의학회 2011 Journal of Veterinary Science Vol.12 No.2

Mammalian oocyte maturation and early embryo development processes are Ca^(2+)-dependent. In this study, we used confocal microscopy to investigate the distribution pattern of Ca^(2+) and its dynamic changes in the processes of bovine oocytes maturation, in vitro fertilization (IVF), parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT) embryo development. During the germinal vesicle (GV) and GV breakdown stage, Ca^(2+) was distributed in the cortical ooplasm and throughout the oocytes from the MI to MII stage. In IVF embryos, Ca^(2+)was distributed in the cortical ooplasm before the formation of the pronucleus. In 4-8 cell embryos and morulas, Ca^(2+) was present throughout the blastomere. In PA embryos, Ca^(2+) was distributed throughout the blastomere at 48 h, similar to in the 4-cell and 8-cell phase and the morula. At 6 h after activation, there was almost no distribution of Ca^(2+) in the SCNT embryos. However, Ca^(2+) was distributed in the donor nucleus at 10 h and it was distributed throughout the blastomere in the 2-8 cell embryos. In this study, Ca^(2+) showed significant fluctuations with regularity of IVF and SCNT groups, but PA did not. Systematic investigation of the Ca^(2+) location and distribution changes during oocyte maturation and early embryo development processes should facilitate a better understanding of the mechanisms involved in oocyte maturation, reconstructed embryo activation and development, ultimately improving the reconstructed embryo development rate.

Frailty and social isolation before and during the coronavirus disease 2019 pandemic among older adults

Ya Su,Masako Hamatani,Michiko Yuki,Natsuka Ogawa,Kayoko Kawahara 한국간호과학회 2023 한국간호과학회 학술대회 Vol.2023 No.11

Association of Urinary Cesium with Breast Cancer Risk

Qin, Ya-Chao,Tang, Lu-Ying,Su, Yi,Chen, Li-Juan,Su, Feng-Xi,Lin, Ying,Zhang, Ai-Hua,Ren, Ze-Fang Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.22

Background: The aim of this study is to examine the association of urinary cesium with breast cancer risk. Materials and Methods: We collected survey data and urine specimens from 240 women with incident invasive breast cancer before their treatment and 246 age-matched female controls between October 2009 and July 2010. Urinary concentrations of cesium were determined by inductively coupled plasma mass spectrometry. Interviews were conducted by face-to-face to obtain information on potential breast cancer risk factors. Logistic regression analysis was used to estimate the associations. Results: Creatinine-adjusted levels [median ($25^{th}$, $75^{th}$) ug/g] of cesium in cases and controls were 17.6 (13.1, 24.0) and 19.3 (15.3, 25.7), respectively. After adjustment for potential risk factors, women in the second and highest tertile of cesium showed a decreased risk of breast cancer in a dose-dependent manner as compared with those in the lowest tertile [ORs and 95% CIs: 0.75 (0.46-1.22) and 0.50 (0.30-0.82), respectively]. This decrease was more evident in women with ER positive or localized clinical stage in an exploratory stratification analysis. Conclusions: These findings suggest that cesium may have anticancer efficacy and urinary cesium has potential as a biomarker for breast cancer risk assessment.

The Application of welding numerical simulation on two typical welded structures in railway vehicles

Ya-na, Li,Cheng-tao, Li,Bin, Yuan,Su-ming, Xie Techno-Press 2012 Interaction and multiscale mechanics Vol.5 No.2

The thin-plate structure and the box-beam structure are two typical welded structures in railway vehicles. Because of their structure complexity, bigger size and multi-seams, welding residual distortion which occur in welding process bring unfavorable effect on the quality of welding products manufacturing and service. As a result, welding distortion forecasting and control become an important and urgent research topic in railway vehicles. In this paper, three different numerical methods are presented corresponding to three typical types of welded structures of railway vehicles and welding deformation are simulated. Consistence of numerical results and experimental data proves the correctness of models and feasibility of simulation methods.

Enrichment of iron element from sulfur-containing iron tailings by S-HGMS technology

Ya-qian Zhou,Rui-ming Yang,Peng-hui Guo,Su-qin Li,Yi Xing 한국초전도저온공학회 2021 초전도와 저온공학 Vol.23 No.3

Comprehensive utilization of sulfur-containing iron tailings (SIT) not only solves environmental problems but also creates certain economic value. The iron element from SIT was enriched by the superconducting high gradient magnetic separation (S-HGMS) technology in this study. In the experiments, the total iron content (TFe) was increased from 26.3% to 60.5% with the total sulfur content (TS) of 5.9% under the optimal parameters, i.e., a magnetic flux density of 0.4 T, a slurry flow rate of 1500 mL/min. The high-quality sulfur-containing material with TFe of more than 60% was obtained, which can be used for preparing high-sulfur free cutting steel. The S-HGMS technology can realize the resource utilization of iron tailings with high added value.

Trypanosoma brucei Inhibitory Activities of Vietnamese Medicinal Plants

Ya Nan Sun,Seo Young Yang,Hong Xu Li,Xiang Dong Su,Gyongseon Yang,Joo Hwan No,Jong Seong Kang,Young Ho Kim 충남대학교 약학대학 의약품개발연구소 2016 藥學論文集 Vol.31 No.-

A large number of extracts from the medicinal plants growing in Vietnam were screened for their in vitro antitrypanosomal activity toward Trypanosoma brucei. Among them, eighty-seven extracts showed the significant antitrypanosomal activity. Especially, the extracts from Neocinnamomum delavayi, Mallotus cuneatus, and Mallotus api exhibited the highest inhibitory activity against T. brucei (IC50: 0.16, 0.49 and <0.05 μg/mL). Cephalotaxus mannii, Pittosporum floribundum, Cleistanthus aff. annamensis, Wendlangia tinctoria subsp. barbatus, Maesa parvifolia, Alpinia malaccensis, Glycosmis scandens, Mallotus yunnanensis, and Maesa sp also presented potent T. brucei inhibitory activity, with IC50 value ranging from 1.14 to 4.98 μg/mL. Based on these results of screening study, the extracts from N. delavayi, M. cuneatus, M. api, C. mannii, P. floribundum, C. aff. annamensis, W. tinctoria subsp. barbatus, M. parvifolia, A. malaccensis, G. scandens, M. yunnanensis, and Mallotus sp. might be the rich source of antitrypanosomal components. Therefore, further phytochemistry and pharmacological study of these medicinal plants should be researched and developed.