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이경욱,채정호,최인철,이해국,권용실,이정태 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2
Objectives : The purpose of this study was to investigate whether elderly and young adults differ in their recognition of facial expressions of emotion. Methods : A total of 120 (elderly group 53, young group 67) subjects participated in this study. Korean facial expressions of emotion including happiness, sadness, fear, anger, disgust, surprise and neutral were used as stimuli for facial affect recognition test. Computerized facial affect recognition test that consists of facial affect discrimination test and facial affect intensity test was performed. Results : For facial affect discrimination test, there was a significant difference between two groups (F==3.986, P<.01) after controlling the effect of education. Elderly participants showed significantly less correct recognition rate with sadness, anger and disgust (p<.05). For facial affect intensity test, there was no significant difference between the groups in recognition of emotional intensity. Chi-square test or t-test was done according to the clinical variables. Multivariate analysis of covahance was done to test group differences of correct recognition rate and emotional intensity. Conclusion : This is the first report of differential decrease of facial affect recognition in elderly using Korean facial expressions. This study suggests that the decrement of facial affect recognition maye be a part of normal aging process.
Characteristics of Silk Sericin Extracted from Sericinjam
Hae Yong Kweon,Joo Hong Yeo,Kee Young Kim,Yong Soon Kim,Ha Seok Song,Su Jin Kim,Soon Ok Woo,Sang Mi Han,Kwang Gill Lee 한국잠사학회 2009 International Journal of Industrial Entomology Vol.18 No.2
We investigated sericin extracted from sericinjam, which was inbred at National Academy of Agricultural Science, Suwon, Korea. Sericinjam sericin is composed of 5 fractions: 250 kDa, 120 kDa, 90 kDa, 70 kDa and 40 kDa. Amino acid analysis showed that the major amino acids of sericinjam sericin were Ser, Gly, Asp, Glu, Thr and Ala. Infrared spectra showed that sericinjam sericin has β-sheet structure. Thermal property of sericin was investigated using DSC and then they showed characteristic degradation peak at around 215~240℃.
Solubility and Conformation of Silk Fibroin Membrane
Kweon, Hae-Yong,Kang, Seok-Woo,Lee, Kwang-Gill,Park, Kwang-Young,Jo, You-Young,Kang, Pil-Don,Sung, Gyoo-Byung,Lee, Heui-Sam,Yeo, Joo-Hong,Shin, Kyu-Hwan,Park, Chan-Hum Korean Society of Sericultural Science 2011 International Journal of Industrial Entomology Vol.22 No.2
Transparency and insolubility of eardrum patch against exudates are important for otolaryngological surgery. The author prepared silk fibroin (SF) films with various concentrations and temperature and then examined solubility and conformation of SF films. SF films were transparent regardless of the various preparation conditions. Although most SF films are soluble in 1X PBS solution at $37^{\circ}C$ for 1 h, the SF film with 3.4% with $60^{\circ}C$ was insoluble. Scanning electron microscopy (SEM) showed that the SF films have solid and smooth surface. Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) results showed that the conformation of SF films was influenced by the preparation conditions including SF concentration and casting temperature. In conclusion, SF membrane with transparence and insolubility against exudates could be considered as eardrum patch resources.
Silk Fibroin Membrane as Guided Bone Regeneration in Rat Calvarial Defects
Kweon, Hae-Yong,Kim, Seong-Gon,An, Jin-Hee,Shim, Hye-Won,Yang, Byoung-Eun,Kim, Jwa-Young,Jo, You-Young,Yeo, Joo-Hong,Lee, Kwang-Gill Korean Society of Sericultural Science 2010 International Journal of Industrial Entomology Vol.21 No.2
Silk fibroin membrane was prepared and examined to know the feasibility of SF membrane as guided bone regeneration. The morphology of silk membrane was flat and smooth surface. The conformation of silk fibroin was $\beta$-sheet structure. When the silk membrane was applied on the rat calvarial defect model, it showed significantly higher new bone formation than uncovered control in histomorphometric analysis. The silk membrane was covered by thin fibrotic tissue and there was not observed any inflammatory cells infiltration. In conclusion, silk fibroin membrane could be useful materials for guided bone regeneration.
PEGylation of Silk Fibroin Model Peptide
Kweon, Hae-Yong,Jo, You-Young,Yeo, Joo-Hong,Woo, Soon-Ok,Han, Sang-Mi,Lee, Kwang-Gill Korean Society of Sericultural Science 2010 International Journal of Industrial Entomology Vol.20 No.2
Silk fibroin model peptide, alanine pentamer was synthesized through solid-phase method and modified with poly(ethylene glycol). Nuclear magnetic resonance spectrometry and Fourier-transform infrared spectroscopy showed the conformation of alanine pentamer, $\beta$-sheet structure and random coil conformation were not changed with PEGylation. Differential scanning calorimetry showed that relatively strong exothermic peak around $180^{\circ}C$ by PEGylation. No cytotoxicity of PEGylated pentamer was observed by L929 cell proliferation test.
Characteristics of Silk Sericin Extracted from Sericinjam
Kweon, Hae-Yong,Yeo, Joo-Hong,Kim, Kee-Young,Kim, Yong-Soon,Song, Ha-Seok,Kim, Su-Jin,Woo, Soon-Ok,Han, Sang-Mi,Lee, Kwang-Gill Korean Society of Sericultural Science 2009 International Journal of Industrial Entomology Vol.18 No.2
We investigated sericin extracted from sericinjam, which was inbred at National Academy of Agricultural Science, Suwon, Korea. Sericinjam sericin is composed of 5 fractions: 250 kDa, 120 kDa, 90 kDa, 70 kDa and 40 kDa. Amino acid analysis showed that the major amino acids of sericinjam sericin were Ser, Gly, Asp, Glu, Thr and Ala. Infrared spectra showed that sericinjam sericin has $\beta$-sheet structure. Thermal property of sericin was investigated using DSC and then they showed characteristic degradation peak at around $215{\sim}240^{\circ}C$.
Preparation and Characterization of Silk Fibroin Nanoparticles
Kweon, Hae-Yong,Yeo, Joo-Hong,Woo, Soon-Ok,Han, Sang-Mi,Jo, You-Young,Lee, Kwang-Gill Korean Society of Sericultural Science 2010 International Journal of Industrial Entomology Vol.20 No.1
Silk fibroin was conjugated with methoxypoly(ethylene glycol) derivatives to prepare silk nanoparicles. Conjugation of SF with PEG was examined with various instrumental analyses. Nuclear magnetic resonance spectrometry and amino acid analysis showed that serine and tyrosine residues in SF were reacted with PEG and resulted in increasing molecular weight. The sizes and shapes of SF nanoparticles observed by transmission electronmicroscope were ranged about 150-400 nm in diameter and spherical morphology. UV/VIS spectrometry showed SF nanoparticles might be outer PEG and inner SF structure.
Cocoon Filament Quality of a Special Silkworm Variety, GoldenSilk
( Hae Yong Kweon ),( Kwang Gill Lee ),( Kwang Young Park ),( Seok Woo Kang ),( Pil Don Kang ),( Mi Ja Kim ),( Kee Young Kim ) 한국잠사학회 2012 International Journal of Industrial Entomology Vol.24 No.1
The effect of cultivation season on the cocoon filament quality of authorized silkworm variety, GoldenSilk was examined with cocoon filament character, reeling character, and fiber character during 3 years. In cocoon filament character, filament length of spring and autumn cocoon was 979 and 879 m, respectively. Cocoon filament weight of spring and autumn cocoon was 33.1 and 26.5 cg, which is lower than that of general bivoltine strain, BaeGokJam. Raw silk percentage of spring and autumn cocoon was 15.65 and 13.77%, respectively. In reeling character, reelability showed similar trend regardless of cultivation season and strain. However, the length and weight of non-broken filament of spring season were slightly higher than those of autumn cocoon. Cultivation season did not affect on the fiber characteristics such as clearness and neatness, lousiness, and degumming loss. In cocoon character, filament length, size, and weight, spring cocoon filament showed higher value than autumn cocoon, but lower than authorized general silkworm varieties. In reeling characteristics, non-broken length and weight showed the similar trends with the cocoon filament character. However, the reelability of GoldenSilk cocoon was not affected by cultivation season. The reelability of GoldenSilk cocoon was also similar with that of authorized general one. Fiber character including clearness and neatness, lousiness, and degumming loss was also similar regardless of the rearing season and different strain.
Effects of silk fibroin hydrolysate on bone metabolism in ovariectomized rats
( Hae Yong Kweon ),( Sun Hee Shin ),( Jeong Woo Chon ),( Kwang Gill Lee ),( You Young Jo ),( Ji Young Yoon ),( Yoo Kyoung Park ),( Jong Young Jeon ),( Jong Ho Kim ),( Bong Seob Shin ) 한국잠사학회 2015 International Journal of Industrial Entomology Vol.30 No.1
This study aimed to investigate the effects of silk fibroin on bone metabolism in ovariectomized rats. A total of 30 Sprague-Dawley rats were randomized into sham-operated (SHAM), ovariectomized control (OVX), alendronate (OVX+ALEN, 10 mg/kg body weight/d), low silk fibroin (OVX+SF100, 100 mg/kg body weight/d), and high silk fibroin (OVX+SF300, 300 mg/kg body weight/d) groups. All the rats were fed by gavage for 12 wk. At the end of 12 wk, blood and urine were collected for analysis of bone turnover markers, and bone mineral density (BMD) was measured by micro-computed tomography. The results show that the OVX group (p < 0.05) displayed the highest mean body weight gain. Among the five groups, serum levels of bone alkaline phosphatase (ALP) and urine levels of deoxypyridinoline (DPD) were highest in the OVX group (p < 0.05). Bone ALP levels in the ALEN group were significantly lower than that of the silk-treated groups. On the other hand, DPD levels were not significantly different between the ALEN and silk-fibroin-treated groups (p < 0.05). The trabecular BMD was significantly higher in the ALEN and silk-treated groups compared to the OVX group (p < 0.05). In conclusion, this study showed that silk fibroin has similar effects as alendronate, which is used in osteoporosis medication. Therefore silk fibroin might be a new candidate for the prevention and treatment of osteoporosis in patients.
Cocoon Filament Quality of a Special Silkworm Variety, GoldenSilk
Kweon, Hae-Yong,Lee, Kwang-Gill,Park, Kwang-Young,Kang, Seok-Woo,Kang, Pil-Don,Kim, Mi-Ja,Kim, Kee-Young Korean Society of Sericultural Science 2012 International Journal of Industrial Entomology Vol.24 No.1
The effect of cultivation season on the cocoon filament quality of authorized silkworm variety, GoldenSilk was examined with cocoon filament character, reeling character, and fiber character during 3 years. In cocoon filament character, filament length of spring and autumn cocoon was 979 and 879 m, respectively. Cocoon filament weight of spring and autumn cocoon was 33.1 and 26.5 cg, which is lower than that of general bivoltine strain, BaeGokJam. Raw silk percentage of spring and autumn cocoon was 15.65 and 13.77%, respectively. In reeling character, reelability showed similar trend regardless of cultivation season and strain. However, the length and weight of non-broken filament of spring season were slightly higher than those of autumn cocoon. Cultivation season did not affect on the fiber characteristics such as clearness and neatness, lousiness, and degumming loss. In cocoon character, filament length, size, and weight, spring cocoon filament showed higher value than autumn cocoon, but lower than authorized general silkworm varieties. In reeling characteristics, non-broken length and weight showed the similar trends with the cocoon filament character. However, the reelability of GoldenSilk cocoon was not affected by cultivation season. The reelability of GoldenSilk cocoon was also similar with that of authorized general one. Fiber character including clearness and neatness, lousiness, and degumming loss was also similar regardless of the rearing season and different strain.