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얇은 도핑조절 a-Si:H초격자에서 지속 광전기 전도도
康聖洙,梁承勳,李原鎭,金英鳳,孔維庠,朴相俊,崔時永 慶北大學校 1990 論文集 Vol.49 No.-
Very large PPC effect(σ_ppc/σ_A=10^5) in doping-modulated npnp a-Si: H superlattices could be obtained. B and P atoms, respectively, diffuse and so some parts compensated. Therefore, annealing activation energy of E_a=0.67eV is larger than one of reference n-type sample of E_a=0.26eV and annealing dark conductivity of σ_A=4×10^-[ohm cm]^-1 is lower than that of n-type reference sample of σ_A=2×10 exp (4)[ohm cm]^-1. From this results, very large PPC relatively have obtained. In this paper, we have observed that PPC effect depends on temperature and exposure time. On the basis of the experimental results, we discuss the existing models.
A Case of Isoniazid-induced Thrombocytopenia: Recovery with Immunoglobulin Therapy
( Seung Hun Lee ),( Eun Ju Lee ),( You Eun Kim ),( Seung Jun Lee ),( Yu Ji Cho ),( Yi Yeong Jeong ),( Ho Cheol Kim ),( Jong Deok Lee ),( Young Sil Hwang ) 대한내과학회 2011 대한내과학회 추계학술발표논문집 Vol.2011 No.1
A 51-year-old man was diagnosed with pulmonary tuberculosis. Treatment for a 51-year-old man with pulmonary tuberculosis was begun initiated with isoniazid (INH), rifampicin, ethambutol, and pyrazinamide, and but these were discontinued after 3 weeks because of skin rash and itchinessg sensation 3 weeks posttreatment. Isoniazid INH monotherapy was restarted to identify the causative drug after 2 weeks of interruption. Two days laterafter INH administration, his the patient``s platelet count was reduced from 150 x× 103/mm3 to 4 x× 103/mm3. The patients did not improve despite of pPlatelet transfusion and oral corticosteroid administration for 2severe days did not cause any improvement in the patient`s condition. However, his platelet count was recovered with to 209 x× 103/mm3 after 2-day administration of intravenous immunoglobulin (IVIG) was started for two days. This report describesis a case of INH-induced thrombocytopenia due to INH, a rare adverse event, which was recovered reversed with IVIG, highlighting the efficacy of this treatment for this rare indication.
유승훈(Seung-Hun You) 순천향대학교 인문학연구소 2011 순천향 인문과학논총 Vol.28 No.-
이 연구는 소금장수 이야기에 등장하는 수많은 소금장수의 이미지 가운데 보부상으로서 소금장수의 표상들을 주요하게 고찰해 보았다. 설화 속 소금장수는 '중계와 매개'의 역할을 하는 인물이었다. 상업적 존재로서 소금장수는 영악한 중계자이며, 상품 교환의 명수였다. 소금장수의 '중계와 매개'는 상품의 교환 외에도 신과 인간 사이에서, 소금장수와 여성 간 성적 욕망을 해소하는 데에도 작동하였다. 이때의 소금장수는 신과 인간을 매개하고 정보를 전파하는 전달자였으며, 욕정을 해소하고, 병을 치유하는 해결자를 표상하였다. This study tried to consider symbols of a salt seller as pedlars among images of a great number of salt seller to appear in it to a salt seller story so as to be important. I look into the fable the salt seller in various sights at this study, and the symbol a discussion tried what meaning was at tales. The salt seller was a person playing of 'trade and mediation'. He was clever trader and master of commodity exchange as the commercial existences. The salt seller let us connect ghost and man and satisfied her sexual desires. He was a messenger spreading information and a symbol did the curer which healed desire and a disease.
Antibacterial Activity of Curcuma longa against Methicillin-resistant Staphylococcus aureus
You, Yong Ouk,Yu, Hyeon Hee,Jeon, Byung Hun,Jeong, Seung Il,Cha, Jung Dan,Kim, Shin Moo,Kim, Kang Ju 대한동의생리학회,대한동의병리학회 2003 동의생리병리학회지 Vol.17 No.2
Methicillin-resistant Staphylococcus aureus (MRSA) has been emerging worldwide as one of the most important hospital and community pathogens. Therefore, new agents are needed to treat the MRSA. In the present study, we investigated antimicrobial activity of ethyl acetate, methanol, and water extracts of Cureuma longa L. (C. longa) against clinical isolates of MRSA. The ethyl acetate extract of C. longa demonstrated a higher antibacterial activity than the methanol extract or water extract. Since the ethyl acetate extract was more active than other extracts, we examined whether ethyl acetate extract may restore the antibacterial activity of β-lactams and alter the adhesion and invasion of MRSA to human mucosal fibroblasts (HMFs). In the checkerboard test, ethyl acetate extract of C. longa markedly lowered the MICs of ampicillin and oxacillin against MRSA. In the bacterial adhesion and invasion assay, MRSA intracellular invasion were notably decreased in -the presence of 0.125 - 2 mg/ml of C. longa extract compared to the control group. These results suggest that ethyl acetate extract of C. longa may have antibacterial activity and the potential to restore the effectiveness of β-lactams against MRSA, and inhibit the MRSA adhesion and invasion to HMFs.
Seung-Hun Lee,Jin-Oh You 한국유화학회 2015 한국응용과학기술학회지 Vol.32 No.2
Stimuli-responsive biomaterials that alter their function through sensing local molecular cues may enable technological advances in the fields of drug delivery, gene delivery, actuators, biosensors, and tissue engineering. In this research, pH-responsive hydrogel which is comprised of dimethylaminoethyl methacylate (DMAEMA) and 2-hydroxyethyl methacrylate(HEMA) was synthesized for the effective delivery of doxorubicin (Dox) to breast cancer cells. Cancer and tumor tissues show a lower extracellular pH than normal tissues. DMAEMA/HEMA hydrogels showed significant sensitivity by small pH changes and each formulation of hydrogels was examined by scanning electron microscopy, mechanical test, equilibrium mass swelling, controlled Dox release, and cytotoxicity. High swelling ratios and Dox release were obtained at low pH buffer condition, low cross-linker concentration, and high content of DMAEMA. Dox release was accelerated to 67.3% at pH 5.5 for 6-h incubation at 37oC, while it was limited to 13.8% at pH7.4 at the same time and temperature. Cell toxicity results to breast cancer cells indicate that pH-responsive DMAEMA/HEMA hydrogels may be used as an efficient matrix for anti-cancer drug delivery with various transporting manners. Also, pH-responsive DMAEMA/HEMA hydrogels may be useful in therapeutic treatment which is required a triggered release at low pH range such as gene delivery, ischemia, and diabetic ketoacidosis.
You, Chang-Hun,Kim, Byoung-Gwon,Kim, Jung-Man,Yu, Seung-Do,Kim, Yu-Mi,Kim, Rock-Bum,Hong, Young-Seoub The Korean Society for Preventive Medicine 2011 Journal of Preventive Medicine and Public Health Vol.44 No.5
Objectives: This study investigated the relationship between the blood mercury concentration and cardiovascular risk factors in elderly Korean individuals living in coastal areas. Methods: The sample consisted of 477 adults (164 males, 313 females) aged 40 to 65 years who visited a Busan health promotion center from June to September in 2009. The relationship between blood mercury concentration and cardiovascular risk factors including metabolic syndrome, cholesterol profiles, blood pressure, body mass index (BMI), waist circumference and waist-to-hip ratio (WHR), was investigated. Variables related to blood mercury concentration were further evaluated using multiple regression analysis. Results: The blood mercury concentration of the study population was 7.99 (range, 7.60 to 8.40) ${\mu}g$/L. In males, the blood mercury concentration was 9.74 (8.92 to 10.63) ${\mu}g$/L, which was significantly higher than that in females (7.21, [6.80 to 7.64] ${\mu}g$/L). The blood mercury concentration of the study population was related to several cardiovascular risk factors including low-density lipoprotein (LDL) cholesterol (p=0.044), high-density lipoprotein (HDL) cholesterol (p=0.034), BMI (p = 0.006), waist circumference (p = 0.031), and WHR (p < 0.001). In males, the blood mercury concentration was significantly correlated with WHR in the multiple regression analysis. Conclusions: In males, the blood mercury concentration was related to waist-to-hip ratio, which is a central obesity index and cardiovascular risk factor. Our finding suggests that cardiovascular disease risk in males was increased by mercury exposure via an obesity-related mechanism.
Design and Implementation of Content Switching Network Processor and Scalable Switch Fabric
You-Sung Chang,Ju-Hwan Yi,Hun-Seung Oh,Seung-Wang Lee,Moo-Kyung Kang,Jung-Bum Chun,Jun-Hee Lee,Jin-Seok Kim,Sang-Ho Kim,Hee-Jae Jung,Il-Sung Hong,Yong-Hwan Kim,Yu-Sik Lee,Chong-Min Kyung 대한전자공학회 2003 Journal of semiconductor technology and science Vol.3 No.4
Clinical Features according to the Frequency of Acute Exacerbation in COPD
( Seung Jun Lee ),( Seung Hun Lee ),( Yu Eun Kim ),( Yu Ji Cho ),( Yi Yeong Jeong ),( Ho Cheol Kim ),( Jin Hyun Kim ),( Jin Jong You ),( Chul Ho Yoon ),( Jong Deog Lee ),( Young Sil Hwang ) 대한결핵 및 호흡기학회 2012 Tuberculosis and Respiratory Diseases Vol.72 No.4
Background: Chronic obstructive pulmonary disease (COPD) is now regarded as a heterogenous disease, with variable phenotypes. Acute exacerbation of COPD is a major event that alters the natural course of disease. The frequency of COPD exacerbation is variable among patients. We analyzed clinical features, according to the frequency of acute exacerbation in COPD. Methods: Sixty patients, who visited Gyeongsang National University Hospital from March 2010 to October 2010, were enrolled. Patients were divided into two groups, according to their frequency of acute exacerbation. Frequent exacerbator is defined as the patient who has two or more exacerbation per one year. We reviewed patients` medical records and investigated modified Medical Research Council (MMRC) dyspnea scale, smoking history and frequency of acute exacerbation. We also conducted pulmonary function test and 6-minute walking test, calculated body mass index, degree of airway obstruction and dyspnea and exercise capacity (BODE) index and measured CD146 cells in the peripheral blood. Results: The number of frequent exacerbators and infrequent exacerbators was 20 and 40, respectively. The frequent exacerbator group had more severe airway obstruction (forced expiratory volume in one second [FEV1], 45% vs. 65.3%, p=0.001; FEV1/forced vital capacity, 44.3% vs. 50.5%, p=0.046). MMRC dyspnea scale and BODE index were significantly higher in the frequent exacerbator group (1.8 vs. 1.1, p=0.016; 3.9 vs. 2.1, p=0.014, respectively). The fraction of CD146 cells significantly increased in the frequent exacerbator group (2.0 vs. 1.0, p<0.001). Conclusion: Frequent exacerbator had more severe airway obstruction and higher symptom score and BODE index. However, circulating endothelial cells measured by CD146 needed to be confirmed in the future.