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Jo, Yong Gu,Shin, Eun Joo,Lee, Young Jae,Yoon, Won Sik,Han, Sung Soo,Lee, Yang Hun,Lee, Yong Rok,Noh, Seok Kyun,Gal, Yeong Soon,Lyoo, Won Seok Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of applied polymer science Vol.113 No.3
<P>To enhance the thermal stability of poly(vinyl alcohol) (PVA) fiber, the fiber was prepared from the gel spinning of high molecular weight (HMW) PVA by using dimethyl sulfoxide/water (8/2, v/v) as a solvent, accompanied with the cross-link by boric acid (B-PVA). In addition, the structure and properties of the B-PVA fiber were compared with those of the HMW PVA fiber obtained by using the same spinning system without cross-linking (NB-PVA). Through a series of experiments, it turned out that cross-linking actualized by an optimum amount of boric acid (0.3 wt % based on PVA) and zone drawing caused significant changes in the properties of HMW PVA gel fiber. That is, cross-linking increased thermal degradation temperatures at each degradation step and amounts of final residues, resulting in improving thermal properties of the PVA fiber. On the contrary, it was found that in the case of the B-PVA fiber, some broadening of the original PVA unit cell occurred, which was identified by the peak shift to lower angle in X-ray diffractogram. The tensile strength and Young's modulus of B-PVA fiber with draw ratio of 15 are 23.1 and 308.3 g/d, respectively. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009</P>
우리나라 노인여성의 골다공증성 척추골절로 인한 경제적 부담 추계
강혜영,강대룡,장영화,박성은,최원정,문성환,양규현,Kang, Hye-Young,Kang, Dae-Ryong,Jang, Young-Hwa,Park, Sung-Eun,Choi, Won-Jung,Moon, Seong-Hwan,Yang, Kyu-Hyun 대한예방의학회 2008 예방의학회지 Vol.41 No.5
Objectives : To estimate the economic burden of osteoporotic vertebral fracture (VF) from a societal perspective. Methods : From 2002 to 2004, we identified all National Health Insurance claims records for women ${\geq}50$ years old with a diagnosis of VF. The first 6-months was defined as a "clearance period," such that patients were considered as incident cases if their first claim of fracture was recorded after June 30, 2002. We only included patients with ${\geq}$ one claim of a diagnosis of, or prescription for, osteoporosis over 3 years. For each patient, we cumulated the claims amount for the first visit and for the follow-up treatments for 1 year. The hospital charge data from 4 hospitals were investigated to measure the proportion of the non-covered services. Face-to-face interviews were conducted with 106 patients from the 4 study sites to measure the out-of-pocket spending outside of hospitals. Results : During 2.5 years, 131,453 VF patients were identified. The patients had an average of 3.38 visits, 0.40 admissions and 6.36 inpatient days. The per capita cost was 1,909,690 Won: 71.5% for direct medical costs, 20.6% for direct non-medical costs and 7.9% for indirect costs. The per capita cost increased with increasing age: 1,848,078 Won for those aged 50-64, 2,084,846 Won for 65-74, 2,129,530 Won for 75-84and 2,121,492 Won for those above 84. Conclusions : Exploring the economic burden of osteoporotic VF is expected to motivate to adopt effective treatment options for osteoporosis in order to prevent the incidence of fracture and the consequent costs.
( Kyung-nam Bae ),( Kihyuk Shin ),( Woo-il Kim ),( Min-young Yang ),( Won-ku Lee ),( Gun-wook Kim ),( Hyun-chang Ko ),( Byung-soo Kim ),( Moon-bum Kim ),( Hoon-soo Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Nodular fasciitis (NF) is a rare benign fibrous tumor related with a proliferative reactive process arising mostly from the muscular fascia or deep subcutaneous region. It distinctively appeared as solitary nodule in young-aged patient with rapid growth, which gives its other name as pseudosarcomatous fibromatosis. A 16-year old boy visited our clinic for the palpable mass on the left shoulder. The initial lesion had already been partially removed by the skin biopsy at local clinic. The biopsy specimen showed only fragments of fibrous mass consisting of collagenous stroma with spindle-shaped cells, but no atypia or mitotic figure. Surgical excision was performed, of which the surgical specimen showed invasion of spindle shaped cells involving subcutaneous layer interlacing with conspicious collagenous fiborus stroma without malignant features. After 3 months, two nodules reappeared near the operation sites and the following biopsy results showed the same as before. We decided to observe the remaining lesions and there had been no significant changes for 5 months. Multiple lesional occurrence is as quite uncommon feature of NF as the recurrence after surgical treatment. Herein, we report a rare case of multiple recurrence of NF after surgical extirpation, which presented with in-transit metastasis of sarcoma-like feature.
Erosive adenomatosis of the nipple presenting early improvement after short-term cryotherapy
( Kyung-nam Bae ),( Kihyuk Shin ),( Woo-il Kim ),( Min-young ),( Yang Won-ku Lee ),( Hoon-soo Kim ),( Hyun-chang Ko ),( Byung-soo Kim ),( Moon-bum Kim ),( Gun-wook Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Erosive adenomatosis of the nipple (EAN) is a rare benign neoplasm characterized by the erosion of the nipple forming crust with serous or bloody discharge. Although there is no pronounced link between its nature course with the malignant transformation, the erosive deformity is directly related to the recurrent functional discomfort and cosmetic problem, resulting in deterioration of the quality of life. A 22-year old woman visited the breast clinic for her persistent deformity of the left nipple. She underwent a core-needle biopsy of a breast mass, which was incidentally found during a breast examination. However, no additional abnormalities were found except for fibrocystic change, and then visited to our clinic for evaluation of the skin lesion. The physical examination revealed serous and bloody erosion on top of the nipple with loss of half of its normal structure. The skin biopsy showed hyperplasia of the tubular structure composed of layers of cuboidal cells, but no atypia or pleomorphism. Then she received four times of cryosurgery every six-weeks, and after 6 months the nipple almost completely healed only remaining a tiny slit-like hole. Although the first choice of treatment for EAN is local excision, it is not quite feasible approach in young-aged female patients given the unsatifactory cosmetical outcomes and the anxiety for invasive procedure. Cryotherapy could be one of the acceptable option for the treatment of EAN.
죽탄 및 죽초액 제조를 위한 인도네시아산 및 국내산 대나무의 탄화특성 비교 연구
Yang, Won,Kim, Hui-Yeol,Chae, Tae-Young,Ibik, K.,Pohan, H.G. 한국연소학회 2010 한국연소학회지 Vol.15 No.1
Carbonization characteristics of Indonesian bamboos were investigated using lab-scale tube furnace, in order to find optimum design temperature of a carbonizer for producing bamboo charcoal and vinegar. The bamboo samples used in this study are local bamboos from Damyang in Korea, Andong and Petung in Indonesia. Correlation of electric resistance, specific surface area and pH of bamboo vinegar with pyrolysis temperature has been investigated. Electric resistance of the charcoal increased for higher pyrolysis temperature the specific surface area was also increased as carbonization temperature got higher. Charcoal which has specific surface area of over $300\;m^2/g$ could be produced at $700^{\circ}C$. pH of bamboo vinegar was decreased for highter carbonization temperature and vinegar under pH 3 could be produced for all bamboo samples. In this experimental condition, it was found that lower carbonization temperature is better for producing bamboo vinegar of high quality, while higher temperature is better for obtaining bamboo charcoal with larger surface.
Serological Survey for Canine Parvovirus Type 2a (CPV-2a) in the Stray Dogs in South Korea
Yang, Dong-Kun,Yoon, Soon-Seek,Byun, Jae-Won,Lee, Kyung-Woo,Oh, Yoon-I,Song, Jae-Young The Korean Society for Microbiology 2010 Journal of Bacteriology and Virology Vol.40 No.2
Canine parvovirus type-2 (CPV-2) is one of the major diarrhea-causing agents, inducing acute hemorrhagic gastroenteritis in puppies. In this study, we conducted a seroepidemiological survey of CPV-2a in stray dogs in South Korea. In total, 405 canine sera, collected between 2006 and 2007, were screened for the presence of antibodies against CPV-2a using a hemagglutination inhibition (HI) assay. The positive rate in stray dogs tested for CPV-2a was 93.8%. The regional CPV-2a prevalence was 100% (8/8) in Jeju, 95.1% (232/244) in Gyeonggi, 94.7% (36/38) in Jeonra, 92.9% (13/14) in Gangwon, 92.7% (38/41) in Chungcheong, and 88.3% (53/60) in Gyeungsang province. No significant difference in the seropositive rate was found between male (93.6%) and female (94.0%) dogs. Analysis of the distribution of HI titer against CPV-2a according to the age of the stray dogs showed a linear increase in seroprevalence with age, although the association with age was not statistically significant. The incidence of stray dogs showing an HI antibody titer above 1:5120 was estimated to be 26.2%. Thus, the presence of high HI antibody against CPV-2a may indicate circulation of CPV-2a in stray dogs.