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金亮均,李準熙,崔正鎬,申鉉穆 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.2
Computer programs called "PCBRG" and "PCPST' were developed to analyze and design the prestressed concrete bridge. PCBRG is a structural analysis program which can determine the member forces, displacements and adaptable area of tendon by iteration method. PCPST is a post-processor for design. It enables design variables verified and the results of analysis (stress, member force and displacement, etc) are presented in the screen. Also the shear force and bending strength by the deformation compatibility method were checked.
전신마취 후 점액으로 인한 기관내관 폐쇄 : 증례보고 A case report
안기량,엄희상,김지은 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
Nasotracheal intubation is commonly and safely used in the anesthetic management of patients undergoing oral cavity surgery. But endotracheal tube obstruction causes serious complications, including pneumothorax, pulmonary edema, brain injury and death. We experienced a case of endotracheal tube obstruction due to mucous crust after general anesthesia. A 5-year-old woman with cleft palate was intubated with a 4.5 mm amored tube for general anesthesia. During the surgery, vital signs were within normal limits. In the intensive care unit, she exhibited sign of complete airway obstruction. We exchanged the tube with another tube after failure of suction. The airway obstruction was due to a dried mucous crust attached to the bevel of the endotracheal tube. We should keep in mind the presence of an amored endotracheal tube cannot be regarded as a guarantee of a patent airway.
묵은 김치 제조과정에서의 이화학적 및 미생물학적 특성 변화
유맹자,김형량,정희종 한국식생활문화학회 2001 韓國食生活文化學會誌 Vol.16 No.5
To develop the low-temperature and long-term fermented kimchi, kimchi was prepared according to the recipe of a specific ratio of major and minor ingredients and adjusted its salinity to 3.7%. Prepared kimchi fermented at 15±1℃ for 24 hours and transferred and fermented in a refrigerator only used to make low-temperature and long-term fermented kimchi at -1±1℃ for 30 weeks. During 30 weeks of fermentation the changes in physicochemical and microbiological properties of low-temperature and long-term fermented kimchi were studied. The initial pH of 6.47 decreased gradually and dropped to pH 4.0 after 14 weeks of fermentation, and then it maintained at same level. Acidity increased to 0.49% on 2 weeks of fermentation and kept at 0.47∼0.50% during 2 to 30 weeks fermentation. Salinity was slightly increased at early stage and started to decrease on 4 weeks of fermentation, and then it did not change. The change of reducing sugar content was closely related to the trend of pH change with a very high correlation coefficient(r=0.912). Lactic acid, citric acid, malic acid, succinic acid and acetic acid were major organic acids contained in low-temperature and long-term fermented kimchi. Vitamin C content decreased at initial stage of fermentation and then slightly increased up to the maximum of 22.3㎎% on 8 weeks of fermentation. In color measurement, L value continued to increase during the fermentation and reached at the highest of 55.45 on 22 weeks of fermentation, and a and b values of 3.62 and 4.54 also increased to 31.26 and 37.32 on 30 weeks of fermentation, respectively. Total microbial count increased slowly from beginning and was the highest on 4 weeks of fermentation, and then began to decrease slowly. Count of lactobacillus spp. was highest after 6 weeks, but count of Leuconostoc spp. was highest on 2 weeks of fermentation, and then both showed a slow decrease. Yeast count wasn't increased until 4 weeks of fermentation and then increased rapidly to get the highest on 10 weeks of fermentation.
Kim, Hwan-Young,Kim, Hye-Ran,Kang, Min-Gu,Trang, Nguyen Thi Dai,Baek, Hee-Jo,Moon, Jae-Dong,Shin, Jong-Hee,Suh, Soon-Pal,Ryang, Dong-Wook,Kook, Hoon,Shin, Myung-Geun Hindawi Publishing Corporation 2014 BioMed research international Vol.2014 No.-
<P>This study investigated the profiling of polycyclic aromatic hydrocarbon- (PAH-) induced genotoxicity in cell lines and zebrafish. Each type of cells displayed different proportionality of apoptosis. Mitochondrial DNA (mtDNA) copy number was dramatically elevated after 5-day treatment of fluoranthene and pyrene. The notable deregulated proteins for PAHs exposure were displayed as follows: lamin-A/C isoform 3 and annexin A1 for benzopyrene; lamin-A/C isoform 3 and DNA topoisomerase 2-alpha for pentacene; poly[ADP-ribose] polymerase 1 (PARP-1) for fluoranthene; and talin-1 and DNA topoisomerase 2-alpha for pyrene. Among them, lamin-A/C isoform 3 and PARP-1 were further confirmed using mRNA and protein expression study. Obvious morphological abnormalities including curved backbone and cardiomegaly in zebrafish were observed in the 54 hpf with more than 400 nM of benzopyrene. In conclusion, the change of mitochondrial genome (increased mtDNA copy number) was closely associated with PAH exposure in cell lines and mesenchymal stem cells. Lamin-A/C isoform 3, talin-1, and annexin A1 were identified as universal biomarkers for PAHs exposure. Zebrafish, specifically at embryo stage, showed suitable <I>in vivo</I> model for monitoring PAHs exposure to hematopoietic tissue and other organs.</P>
Kim, Jae-Ouk,Rho, Semi,Kim, Su Hee,Kim, Heejoo,Song, Hyo Jin,Kim, Eun Jin,Kim, Ryang Yeo,Kim, Eun Hye,Sinha, Anuradha,Dey, Ayan,Yang, Jae Seung,Song, Man Ki,Nandy, Ranjan Kumar,Czerkinsky, Cecil,Kim, American Society for Microbiology 2015 CLINICAL AND VACCINE IMMUNOLOGY Vol.22 No.4
<P>In developing countries, <I>Shigella</I> is a primary cause of diarrhea in infants and young children. Although antibiotic therapy is an effective treatment for shigellosis, therapeutic options are narrowing due to the emergence of antibiotic resistance. Thus, preventive vaccination could become the most efficacious approach for controlling shigellosis. We have identified several conserved protein antigens that are shared by multiple <I>Shigella</I> serotypes and species. Among these, one antigen induced cross-protection against experimental shigellosis, and we have named it pan-<I>Shigella</I> surface protein 1 (PSSP-1). PSSP-1-induced protection requires a mucosal administration route and coadministration of an adjuvant. When PSSP-1 was administered intranasally, it induced cross-protection against <I>Shigella flexneri</I> serotypes 2a, 5a, and 6, <I>Shigella boydii</I>, <I>Shigella sonnei</I>, and <I>Shigella dysenteriae</I> serotype 1. Intradermally administered PSSP-1 induced strong serum antibody responses but failed to induce protection in the mouse lung pneumonia model. In contrast, intranasal administration elicited efficient local and systemic antibody responses and production of interleukin 17A and gamma interferon. Interestingly, blood samples from patients with recent-onset shigellosis showed variable but significant mucosal antibody responses to other conserved <I>Shigella</I> protein antigens but not to PSSP-1. We suggest that PSSP-1 is a promising antigen for a broadly protective vaccine against <I>Shigella</I>.</P>
휴리스틱 사용성 평가방법을 사용한 컴퓨터 보안의 사용자 인식에 대한 연구
Ryang-Hee Kim,Young-Guk Kwon,Kee-Sam Jeong 대한인간공학회 2012 대한인간공학회 학술대회논문집 Vol.2012 No.11
Objective: The aim of this study is to study user awareness of the computer security using selected heuristic usability method. There is no difference in age groups for awareness of computer security. Background: Currently, the networking computer system has been used in supplying electric power, opening facility of dam, web-surfing, air defense weapon of military, weather prediction and national security. There has been a leaking of personal information from a major portal site by the hackers. The victims’ personal information is used for crimes, such as “Illegally opening an account”, or “sending Spam”. Method: We collected 137 usability principles from previous literatures, including Nielsen (1994)`s checklist, screened a total of 34 usability principles among them in terms of tangible user interface main properties, and refined twenty five usability principles. The selected usability principles are classified systematically using statistical method, T-test and Principle Components Analysis (PCA) using Factor Analysis. 196 subjects (Groups: 20-40’s, 40-70’s) were divided into two groups: Adolescence group (N: 108, Female; 54, Male; 54), Senior-age group (N: 88, Female; 44, Male; 44). Results: As a result, 25 usability principles are categorized into 5 groups according to their correlations and we named them respectively (1) User Interaction-support, (2) User Cognitive-support (3) User Performance-support, (4) User Satisfaction-support, (5) User Physicality principles, as usability checklist items are produced a 5-point Likert scale. Conclusion: The result of T-teat showed that users" awareness of computer security groups were statistically significantly different between Adolescence group and Senior-age group (**p<.01). Application: We evaluated this users" awareness of computer security system using checklists which is a one of currently available tangible user interface prototype, and could suggest 25 usability items for users" awareness of computer security system for the Aged.
( Hee Ryang Kim ),( Jienny Lee ),( Gyeong Been Lee ),( Jeong Su Byeon ),( Na Yeon Gu ),( In Soo Cho ),( Sang Ho Cha ) 한국예방수의학회(구 한국수의공중보건학회) 2015 예방수의학회지 Vol.39 No.3
Mesenchymal stem cells (MSCs) are an attractive source for cell therapy, as they have the potential for differentiation into multi-lineage cells. Adipose tissue is a safe source due to its easy extraction and abundant resource, with minimal risk to the organ donor. In this study, we attempted to correlate the harvest yield and resulting multipotency of feline adipose tissue-derived mesenchymal stem cells (fAD-MSCs) in accordance with processing time. fAD-MSCs were individually isolated from the abdominal adipose tissues of 6 felines. They were divided into two groups, based on their processing times - Group 1: 0~1 day after adipose tissue harvesting; Group 2: more than 3 days after adipose tissue harvesting. In both groups, the proliferation capacity was analyzed using the cumulative population doubling level (CPDL) calculation assay. The expression levels of MSC-specific markers and differentiation potentials into mesodermal cell lineages were also evaluated. We observed that fAD-MSC isolation yields and CPDL were excellent in Group 1 compared with Group 2. We also found that the differentiation potential-specific genes (ACAN and OPN) were strongly expressed in Group 1 compared with Group 2. These results suggest that for the clinical treatments of feline diseases, fAD-MSCs should be isolated within 1 day after adipose tissue harvesting.
Kim, Hye-Ran,Oh, In-Jae,Shin, Myung-Geun,Park, Joon-Seok,Choi, Hyun-Jung,Ban, Hee-Jung,Kim, Kyu-Sik,Kim, Young-Chul,Shin, Jong-Hee,Ryang, Dong-Wook,Suh, Soon-Pal The Korean Academy of Medical Sciences 2011 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.26 No.5
<P>To date, most clinical data on pro-gastrin-releasing peptide (proGRP) have been based on serum concentrations. This study evaluated the agreement between proGRP levels in fresh serum and plasma in patients with various lung diseases. Pairs of serum and EDTA plasma were collected from 49 healthy individuals. At the same time, EDTA plasma of 118 lung cancer patients and 23 patients with benign pulmonary diseases were prospectively collected. Compared to serum, plasma proGRP concentrations were higher by an average of 103.3%. Plasma proGRP was higher in malignancy (336.4 ± 925.4 pg/mL) than in benign conditions (40.1 ± 11.5 pg/mL). Small cell lung cancer (SCLC) patients showed higher levels of proGRP (1,256.3 ± 1,605.6 pg/mL) compared to other types of lung cancer. Based on the ROC curve analyses at a specificity of 95%, the diagnostic sensitivity of plasma proGRP was estimated to be 83.8% in distinguishing SCLC from all the other conditions, and 86.5% for discriminating SCLC from the nonmalignant cases. Among the SCLC cases, limited stage disease had lower levels of plasma proGRP than extensive disease. When measuring circulating levels of proGRP, the use of plasma is preferred over serum. Plasma proGRP has a potential marker for discriminating SCLC from nonmalignant conditions or non-small cell lung cancer.</P>