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Ophthalmic Application of Hydrogel Polymer Containing Carbon Nanomaterials
Seok, Jae-Wuk,Geum, Yong-Pil,Shin, Dong-Seok,Sung, A-Young The Basic Science Institute Chosun University 2019 조선자연과학논문집 Vol.12 No.4
This experiment is to evaluate the physical properties of the hydrogel lens with the addition of carbon-based nanomaterials, Graphene oxide and Carbon nanotube, and to confirm the improvement of strength. Hyaluronic acid, a hydrophilic substance, was used as an additive by using HEMA (2-hydroxyethyl methacrylate) and ethylene glycol dimethacrylate (EGDMA) as a base monomers. Graphene oxide and two types of Carbon nanotubes(Amide functionalized and Carboxilic acid functionalized) were added 0.1%, 0.3%, 0.5%, respectively, and the physical properties were analyzed by measuring water content, refractive index, breaking strength and SEM image. In the case of the sample added with each carbon nano material, the water content tended to increase for all three materials. The breaking strength tended to increase in Graphene oxide and Carbon nanotube; Carboxilic acid functionalized, but in the case of Carbon nanotube; amide fuctionalized, the breaking strength tended to decrease. However, Carbon nanotube; amide fuctionalized had the highest breaking strength among the three nano materials. Thus, the addition of certain carbon nanomaterials seems to be appropriate for improving the strength of hydrogel lenses.
Seok-Joon Choi(최석준),Myung-Keun Hwang(황명근),Sang-Wuk Shin(신상욱),Se-Hyun Lee(이세현),Jae-Yup Rho(노재엽),Ki-Tae Kwon(권기태),Jeong-Keun Lee(이정근),Kyu-Seung Lee(이규승),Kyuk-Jin Jang(장혁진) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
In this paper, We has been studied the lifetime degradation of LED lighting system compared to Indoor LED lighting.
Seok-Joon Choi(최석준),Myung-Keun Hwang(황명근),Sang-Wuk Shin(신상욱),Se-Hyun Lee(이세현),Jae-Yup Rho(노재엽),Ki-Tae Kwon(권기태),Jeong-Keun Lee(이정근),Kyu-Seung Lee(이규승),Kyuk-Jin Jang(장혁진) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
In this paper, We introduce a case of building that installed LED lighting and observed degradation of in door LED lighting fixture This is very important to define LED lighting fixture's characteristics.
Seok-Joon Choi(최석준),Seung-Yong Yang(양승용),Myung-Keun Hwang(황명근),Sang-Wuk Shin(신상욱),Se-Hyun Lee(이세현),Jae-Yup Rho(노재엽),Jeong-Keun Lee(이정근),Jeong-Jin Seo(서정진) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월
In this paper, We observed spectral responsivity of general poly-cristalline silicon solar cell. This is very important to define solar cell's characteristics. So we tested two small modules that made of poly-cristalline silicon solar cells. We expect to the result of this experiment is useful for researching and measuring solar cell's characteristics.
The role of the sympathetic nervous system in moxibustion-induced immunomodulation in rats
Han, Jae-Bok,Oh, Sang-Duck,Lee, Ki-Seok,Choi, Ki-Soon,Cho, Young-Wuk,Ahn, Hyun-Jong,Bae, Hyunsu,Min, Byung-Il WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2003 東西醫學硏究所 論文集 Vol.2003 No.-
The eflects of chemical sympathectomy on moxibustion-induced changes in splenic natural killer (NK) cell totoxicity, T and B cell proliferation were studied. Direct moxibustion was applied to the unilateral Zusanli region. NK cell cytotoxicity was suppressed by moxibustion in both vehicle-treated rats and sympathectomized rats. T cell proliferation was not affected by moxibustion. B cell proliferation showed no significant change in vehicle-treated rats, but an increase was seen in sympathectomized rats treated with moxibustion. Sympatectomy alone induced an augmentation of NK cell cytotoxicity and a suppression of T cell proliferation. These results suggest that the sympathetic nervous system (SNS) has no significant role in the mechanism of moxibustion-induced immunomodulation.