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고 안정성 전구체를 사용한 InP/ZnS 반도체 나노입자 합성 및 발광 특성 향상
이은진,문종우,김양도,신평우,김영국,Lee, Eun-Jin,Moon, Jong-Woo,Kim, Yang-Do,Shin, Pyung-Woo,Kim, Young-Kuk 한국분말야금학회 2015 한국분말재료학회지 (KPMI) Vol.22 No.6
We report a synthesis of non-toxic InP nanocrystals using non-pyrolytic precursors instead of pyrolytic and unstable tris(trimethylsilyl)phosphine, a popular precursor for synthesis of InP nanocrystals. In this study, InP nanocrystals are successfully synthesized using hexaethyl phosphorous triamide (HPT) and the synthesized InP nanocrystals showed a broad and weak photoluminescence (PL) spectrum. As synthesized InP nanocrystals are subjected to further surface modification process to enhance their stability and photoluminescence. Surface modification of InP nanocrystals is done at $230^{\circ}C$ using 1-dodecanethiol, zinc acetate and fatty acid as sources of ZnS shell. After surface modification, the synthesized InP/ZnS nanocrystals show intense PL spectra centered at the emission wavelength 612 nm through 633 nm. The synthesized InP/ZnS core/shell structure is confirmed with X-ray diffraction (XRD) and Inductively Coupled Plasma - Atomic Emission Spectrometer (ICP-AES). After surface modification, InP/ZnS nanocrystals having narrow particle size distribution are observed by Field Emission Transmission Electron Microscope (FE-TEM). In contrast to uncapped InP nanocrystals, InP/ZnS nanocrystals treated with a newly developed surface modified procedure show highly enhanced PL spectra with quantum yield of 47%.
열, 살균소독제, 항생제에 의한 분리 Cronobacter spp. (Enterobacter sakazakii) 제어
이은진,박종현,Lee, Eun-Jin,Park, Jong-Hyun 한국축산식품학회 2010 한국축산식품학회지 Vol.30 No.3
Tolerance against heat, sanitizers, and antibiotics of 112 Cronobacter isolates classified by desiccation was determined to permit effective biocontrol in powdered foods. The isolates were classified into three groups: dry-tolerant (n=37), dry-sensitive (n=7), and dry-intermediate (n=68). The strains that were highly tolerant to drying also showed high heat tolerance that they seemed to have high tolerance to heat after dry stress in powdered foods like infant formula. Sodium hypochlorite and benzalkonium chloride concentrations necessary to achieve a 5-log reduction in viable counts (CFU/mL) were 15-25 ppm and 5-15 ppm, respectively. However, there was little difference of the efficacy of these sanitizers between dry-sensitive and -tolerant strains for planktonic cells suspended in 3% albumin. The minimal inhibition concentration (MIC) of $\beta$-lactam ampicillin was 64-128 ppm for 90% of the strains. The isolates were consistently sensitive to kanamycin and naldixic acid (MIC=4 ppm). Dry-tolerant strains displayed more antibiotic resistance than dry-sensitive strains. The results indicate that dry-tolerant Cronobacter isolates often possess heat and antibiotic resistance, indicated the need for potent sterilization treatments of powdered foods.
인터넷 쇼핑에서 지각된 실용적 가치와 서비스 품질이 패션상품 재구매의도에 미치는 영향
이은진,홍병숙,Lee, Eun-Jin,Hong, Byung-Sook 한국복식학회 2006 服飾 Vol.56 No.7
The purpose of this study is to analyze whether perceived utilitarian value and service qualify have an effect on repurchase intention of fashion merchandise in internet shopping. A survey was conducted from June 20 to July 30 in 2003, among married women aged in their 20s and 30s, on their purchase experience of fashion merchandise from internet shopping malls. The survey was conducted over the internet with 306 subjects. The statistical analysis methods were frequency analysis, reliability analysis, factor analysis, and multiple regression analysis. The results of this study were as follows. 1. A married women aged in their 20s and 30s were shown to high-purchasing on nightgown, underwear, women's pants, casual wear through internet shopping. Their perceived utilitarian value had an effect on repurchase intention of fashion merchandise in internet shopping. 2. The service quality factors were determined to be site reliability, site reactivity, order assurance, order easy, site organization. Service quality factors of site reactivity, order assurance, order easy, site organization had an effect on repurchase intention of fashion merchandise in internet shopping.
이은진,Lee, Eun-Jin 대한출판문화협회 1997 출판저널 Vol.226 No.-
현실문제에 고민하는 이들은 사회학이 현실을 이해하는 데 도움을 주길 원한다. 이런 고민은 정보사회에 대한 낙관적 흐름과 생태학적 위험, 경제적 위기에 대한 비관적 흐름에 관심을 갖게 한다.
두경부 편평상피세포암의 p53단백과 PCNA 및 Ki-67의 발현양상
이은진,이상한,손윤경,Lee, Eun-Jin,Lee, Sang-Han,Sohn, Yoon-Kyung 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.2
To investigate the correlation between the clinical features and the expression of p53, PCNA, and Ki-67 of the head neck squamous cell carcinoma, immunohistochemicalstaining of p53, PCNA, and Ki-67 on the paraffin embedded tissue blocks of 116 surgically removed specimens were done. The staining intensity was divided as grade 1 to grade 3 and the results were statistically analysed. 1. The positive reation rates of cell proliferation markers (PCNA and Ki-67) were higher than that of p53. There was significant correlations of the PCNA and Ki-67 expression but there was no significant correlations between p53 and PCNA or p53 and Ki-67. 2. There were no significant correlation between the expression of p53, PCNA and Ki-67 and tumor site or tumor size. 3. There was no significant differences in the positive response according to the nodal status. The node metastasis groups revealed that higher proportion of grade 3 staining of PCNA and Ki-67 than node negative group. From the above results it is concluded that p53 and cell proliferation markers PCNA and Ki-67 might have their unique mechanism involving in the growing and progression of tumor. Overexpression of p53 does not appear to represent an independent prognostic marker in head neck squamous cell carcinoma.
Nystatin에 반응하지 않는 만성 구강 캔디다증 증례에서 Fluconazole의 효과에 관한 보고
이은진,박원규,고홍섭,Lee, Eun-Jin,Park, Won-Kyu,Kho, Hong-Seop 대한안면통증구강내과학회 2008 Journal of Oral Medicine and Pain Vol.33 No.1
Candidiasis, an opportunistic infectious condition caused by the genus Candida, is the most common oral fungal infection in humans. The diagnosis of oral candidiasis can often be made based on recognition of its clinical pattern, but at times there is difficulty in making a clinical diagnosis because of its various manifestations. Several antifungal medications have been developed for managing fungal infections. Despite the availability of several effective antimycotics for the treatment of oral candidiasis, failure of therapy is not uncommon due to the unique environment of the oral cavity, where the flushing effect of saliva and the cleaning action of the oral musculature tend to reduce the drug concentration to sub-therapeutic levels. In this case report, we present two patients diagnosed with chronic hyperplastic candidiasis and median rhomboid glossitis, which are known as rare forms of candidiasis. In both cases, there was a significant reduction of clinical signs and symptoms when fluconazole was prescribed after the failure of initial nystatin therapy.