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Case Report : A Case of Membranous Lipodystrophy Observed in Lichen Amyloidosis
Yoon Hee Lee,Seok Yong Ahn,Jae Hong Ji,Seung Phil Hong,Ha Na Bak,Sang Hoon Lee,Sung Ku Ahn 대한피부과학회 2009 Annals of Dermatology Vol.21 No.2
Membranous lipodystrophy is characterized by the presence of microcysts lined by amorphous, eosinophilic material with an arabesque appearance. We experienced a case of a 72-year-old man who had dark brownish, pruritic papules on the arms, legs, and back. Histopathologic examination of a biopsied lesion showed homogeneous, eosinophilic material in the papillary dermis, as well as membranous lipodystrophy. We report a case of membranous lipodystrophy observed in lichen amyloidosis. (Ann Dermatol 21(2) 174~177, 2009)
Yoon Gi Chung,Junsuk Kim,Hyung-Sik Kim,Soon-Cheol Chung,Jang-Yeon Park,Sung-Phil Kim 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
Mechanosensation includes the detection of mechanical stimuli from mechanoreceptors and sensory signal transduction to the somatosensory cortex through neural afferents. Previous studies reported the sensory signals of flutter (5-50 Hz) and vibration (50-400 Hz) traveled through separated neural afferents of rapidly adapting type 1 (RA) and rapidly adapting type 2 (PC) respectively, and they activated the primary (S1) and secondary (S2) somatosensory cortices with spatially distinct patterns. In this study, we investigated the cortical activation patterns of S1 and S2 in response to flutter and vibration delivered onto the tips of index (D2) and little (D5) digits using functional magnetic resonance imaging (fMRI). We demonstrated that D2 provided more apparent cortical activation patterns that the event of flutter stimulation elicited contralateral S1 and bilateral S2 activation while the event of vibration stimulation mainly elicited bilateral S2 activation due to the somatotopic neural projection mechanisms of the RA and PC afferents and the density distribution of mechanoreceptors.
Yoon Ah Kim,Gil Jae Jung,Hae Ryung Choi,김종수,이상준,Phil Sang Chung,우승훈 대한의학레이저학회 2022 MEDICAL LASERS Vol.11 No.1
Background and ObjectivesPulsed Nd:YAG lasers have been used in various medical fields and show high second harmonic generation efficiency at 532 nm. The pulse duration at 532 nm varies from 10 ns to 1000 ns, depending on the excitation method. This study aimed to compare the effects of 100 ns and 600 ns, 532 nm flashlamp excited solid (FPSS) and diode excited solid (DPSS) lasers on guinea pig muscles and skin.Materials and MethodsExperiments were carried out on the guinea pig muscles and skin. First, the guinea pig muscles, and skin were irradiated with 532 nm FPSS and DPSS lasers at varying intensities and periods. A visual examination of the muscle lesions and an immediate histopathological examination of the skin were performed.ResultsWhen guinea pig muscles were irradiated with FPSS and DPSS lasers, the degree of light evaporation and photo necrosis was much higher with the FPSS laser. There was also higher guinea pig muscle and skin vaporization and necrosis with the FPSS laser than with the DPSS laser when both lasers were used to irradiate the guinea pig skin at power levels of 1 watt (63.7 J/cm2), 2 watts (127.3 J/cm2), 4 watts (254.6 J/cm2), and 8 watts (509.3 J/cm2).ConclusionThe DPSS laser system appears to be more effective and even safer than the FPSS laser system; it delivers more satisfactory surgical results and causes less serious damage to the surrounding tissue.
( Sang-phil Yoon ),( Young-shin Jeon ),( Hyung-taek Kim ) 한국폐기물자원순환학회 2011 ISWA Vol.2011 No.0
Gas component produced from the landfill area of municipal wastes are mainly composed of CH4, CO2. By selectively removing CO2, the landfill can be easily utilized for the on-site generation of electricity with gas engine or gas turbine. Landfill gas can be upgraded if incombustible CO2 can be selectively separate within the mixture of CH4 and CO2 with specially designed adsorbent. Present study is focused on the developing the CO2 adsorbent material which can be adsorbed selectively in the atmospheric condition of landfill gas. Especially, emphasis is laid on elevating CO2 adsorption performance through the ionexchange of original Zeolite adsorbent. Ion-exchange reagents used during the experiments are 1 mol solution of NaCl, KCl, LiCl. CaCl2 Ion-exchanged adsorbents are examined with XRF, XRD and ICP to evaluate the compositional and structural change. Pre-treated adsorbent materials are experimented in the flow reactor with various temperature & pressure condition. The results showed that Zeolite of ion-exchanged with NaCl showed the highest adsorption capacity. To enhance stability of adsorbent materials, Zeolite is also mixed with various binder to test the stability and pellet type CO2 adsorption performance.