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Micro-Machining을 이용한 SPM(Scanning Probe Microscope)용 실리콘 Probe의 제조
이동발,이정희,함성호,이종현 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1
Scanning probe tip, integrated on the silicon cantilever, is fabricated by means of micro-machining technique. This technique utilizes a combination of dry and wet etching and oxidation sharpening to form very sharp tip which is suitable for SPM. The mechanical requirements for proper operation of probe, such as resonant frequency and force constant are simulated using finite element method. Several types of the probe having different geometrical shape are fabricated. Typical dimensions of cantilver are 150 ~ 190 μm in length, 20 ~ 40 μm in width, and 2 ~ 4 μm in thickness. Typical values of tip height and radius of the tip end are larger than 5 μm and less than 100nm, respectively. Simulated results show that high resonant frequency of approximately 140 kHz and force constant near 2 ~ 5 N/m, which can be applied to tapping and non-contact mode operation of SPM.
Jung, Ho-Bal International Academy of Physical Therapy Research 2010 Journal of International Academy of Physical Ther Vol.1 No.2
Background: This study investigated effective posture for gluteus medius rehabilitation training and effects of isometric muscle activity by electrophysiology through EMG while performing dynamic isotonic behavior of weight placed differently on upper limbs. Method: 16 healthy male subjects 20 to 29 years of age volunteered for the study. Lateral stabilizer right gluteus medius activity was assessed using EMG while the right lower extremity maintains single limb support, and the left upper extremity elevation movement maintains 5 seconds without load, 1RM to 1 repetition, 5RM to 5 times, 10RM to 10 times, 5RM and 10RM maintain 5sec. Results: Comparison of the mean value of EMG data showed a statistically more significant difference in upper extremity elevation movement on opposite upper extremity added weight than one that was not added on a single limb weight bearing posture(p>.05). Weight supported side gluteus medius activity for 1RM, 5RM, 10RM weight difference and movement repetition did not differ(p>.05). Comparison in maximum value showed statistically significant differences in not adding weight on upper limb elevation exercise and 1RM, 5RM, 10RM repeated behavior. Elevation behavior and repetition appeared over 70% of MVIC. Conclusion: Unilateral weight bearing stance added weight in the opposite upper limb elevation movement was an indirect exercise to effectively stimulate gluteus medius activity. Applying various added weight will have effective exercise on the early stages of rehabilitation because activity gluteus medius did not differ through added weight.
Ho Bal Jung 국제물리치료학회 2010 Journal of International Academy of Physical Ther Vol.1 No.2
Background: This study investigated effective posture for gluteus medius rehabilitation training and effects of isometric muscle activity by electrophysiology through EMG while performing dynamic isotonic behavior of weight placed differently on upper limbs. Method: 16 healthy male subjects 20 to 29 years of age volunteered for the study. Lateral stabilizer right gluteus medius activity was assessed using EMG while the right lower extremity maintains single limb support, and the left upper extremity elevation movement maintains 5 seconds without load, 1RM to 1 repetition, 5RM to 5 times, 10RM to 10 times, 5RM and 10RM maintain 5sec. Results: Comparison of the mean value of EMG data showed a statistically more significant difference in upper extremity elevation movement on opposite upper extremity added weight than one that was not added on a single limb weight bearing posture(p>.05). Weight supported side gluteus medius activity for 1RM, 5RM, 10RM weight difference and movement repetition did not differ(p>.05). Comparison in maximum value showed statistically significant differences in not adding weight on upper limb elevation exercise and 1RM, 5RM, 10RM repeated behavior. Elevation behavior and repetition appeared over 70% of MVIC. Conclusion: Unilateral weight bearing stance added weight in the opposite upper limb elevation movement was an indirect exercise to effectively stimulate gluteus medius activity. Applying various added weight will have effective exercise on the early stages of rehabilitation because activity gluteus medius did not differ through added weight.
익모초 물추출물이 흰쥐 대퇴동맥의 혈관경련에 미치는 영향
정용발 ( Yong Bal Jung ),김형환 ( Hyung Hwan Kim ),이송득 ( Song Deuk Lee ),안덕균 ( Duk Kyun Ahn ),신혜승 ( Hye Seung Shin ),백태현 ( Tae Hyeun Baek ),최호영 ( Ho Young Choi ) 대한본초학회 2003 大韓本草學會誌 Vol.18 No.2
N/A Objective : In order to study the effect of water extract of Leonuri herba (ELS) on the subarachnoid hemorrhage animal model, the autologous whole blood was applied to the vicinity of the sprague dawley rat right femoral artery. Methods : Following periarterial application of autologous whole blood (PAB) and intraperitoneal injection of ELS (10, 100 and 300 mghg, P.o.), the vasomotor responses to ELS were identified and the histological changes, neovascularized blood vessel were observed. Results : Contractile response to ELS (10, 100 and 300 mg/kg, p.0.) was significantly decreased in the rat femoral arteries of PAB 5 and 7 days. In PAB 5 and 7 days, significantly increased vessel wall thickness and narrowed lumen were observed in comparison with the control group. In the arteries exposed to autologous whole blood for 5 and 7 days, a lot of newly generated capillaries in association with markedly curved blood vessel wall thickness, elastic lamina and irregularly oriented endothelial cells were observed in the periphery of the vessel wall. The number of neovascularized blood vessels were significantly decreased in the periphery of PAB with ELS (10, 100 and 300 mg/kg, p.0.) 5 and 7 days. In VEGF expression, Blood plus ELS (10, 100 and 300 mg/kg, p.0.)-exposed vessel were more weak expression than blood-exposed vessel to vein autologous whole blood for 5 and 7 days. Conclusions : From these results, we concluded that ELS inhibited posthemorrhagic chronic vasospasm and neovascularization in rat femoral artery model.
Bal, Jyotiranjan,Yun, Suk-Hyun,Yeo, Soo-Hwan,Kim, Jung-Mi,Kim, Beom-Tae,Kim, Dae-Hyuk Springer-Verlag 2017 Applied microbiology and biotechnology Vol.101 No.5
<P>The brewing of makgeolli, one of Korea's most popular alcoholic beverages that is gaining popularity globally, is facilitated by nuruk, a traditional Korean cereal starter. The nuruk microbiome greatly influences the fermentation process as well as the nutritional, hygienic, and aromatic qualities of the product. This study is a continuation of our efforts to examine nuruk biodiversity at a depth previously unattainable. In this study, microfloral dynamics in wheat-based nuruk C, composed of traditional ingredients such as barley, green gram, and wheat and fermented under various internal moisture contents of 20% (C20), 26% (C26), and 30% (C30), was evaluated using 454 pyrosequencing during the 30-day fermentation process. Rarefaction analysis and alpha diversity parameters indicated adequate sampling. C20 showed the greatest fungal richness and diversity, C20 and C26 exhibited similar bacterial richness and diversity, while C30 had low fungal and bacterial richness. Fungal taxonomic assignments revealed that the initial moisture content caused selective enrichment of Aspergillus candidus with a decreasing trend during fermentation, whereas Saccharomycetales sp. exhibited increasing relative abundance with increasing moisture content from day 6 of the fermentation process. Depending on initial moisture level, changes in bacterial communities were also observed in the genera Streptomyces, Bacillus, and Staphylococcus, with decreasing trends whereas Saccharopolyspora exhibited a sigmoidal trend with the highest abundance in C26. These findings demonstrate the possible impact of initial moisture content of nuruk on microfloral richness, diversity, and dynamics; this study is thus a step toward our ultimate goal of enhancing the quality of nuruk.</P>