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Effect of Extremely Low Frequency Electromagnetic Fields (EMF) on Phospholipase Activity in the Cultured Cells
HoSunSong, HeeRaeKim, MyoungSooKo, JaeMinJeong, YongHoKim, MyungCheulKim, YeonHeeHwang, UyDongSohn, Yoon-MyoungGimm, SungHoMyung, SangSooS 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2010, Vol.14 No.6 12 427-433 (7 pages)
This study was conducted to investigate the effects of extremely low frequency electromagnetic fields (EMF) on signal pathway in plasma membrane of cultured cells (RAW 264.7 cells and RBL 2H3 cells), by measuring the activity of phospholipase A2 (PLA2), phospholipase C (PLC) and phospholipase D (PLD). The cells were exposed to the EMF (60 Hz, 0.1 or 1 mT) for 4 or 16 h. The basal and 0.5 ՌM melittin-induced arachidonic acid release was not affected by EMF in both cells. In cell-free PLA2... -
Flexural properties, interlaminar shear strength and morphology of phenolic matrix composites reinforced with xGnP-coated carbon fibers
Jong Kyoo Park, Jae Yeol Lee, Lawrence T. Drzal, Donghwan Cho 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 5 33-38 (6 pages)
In the present study, exfoliated graphite nanoplatelets (xGnP) with different particle sizes were coated onto polyacrylonitrile-based carbon fibers by a direct coating method. The flexural properties, interlaminar shear strength, and the morphology of the xGnP-coated carbon fiber/phenolic matrix composites were investigated in terms of their longitudinal flexural strength and modulus, interlaminar shear strength, and by optical and scanning electron microscopic observations. The results were... -
Preparation and characterization of carbon fiber-reinforced thermosetting composites: a review
Fan-Long Jin, Soo-Jin Park 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 1 67-77 (11 pages)
Carbon fibers (CFs) have a unique combination of properties which allow them to be widely used as reinforcing materials in advanced polymer composites. The mechanical properties of CF-reinforced polymer composites are governed mainly by the quality of interfacial adhesion between the CFs and the polymer matrix. Surface treatments of CFs are generally carried out to introduce chemical functional groups on the fiber surfaces, which provide the ability to control the surface characteristics of CFs.... -
Effects of pore structures on electrochemical behaviors of polyacrylonitrile-based activated carbon nanofibers by carbon dioxide activation
Hye-Min Lee, Hong-Gun Kim, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 10 71-76 (6 pages)
Activated carbon nanofibers (ACNF) were prepared from polyacrylonitrile (PAN)-based nanofibers using CO2 activation methods with varying activation process times. The surface and structural characteristics of the ACNF were observed by scanning electron microscopy and X-ray diffraction, respectively. N2 adsorption isotherm characteristics at 77 K were confirmed by Brunauer-Emmett-Teller and Dubinin-Radushkevich equations. As experimental results, many holes or cavernous structures were found on... -
Preparation of Carbon Nanofibers by Catalytic CVD and Their Purification
Jae-Seok Lim, Seong-Young Lee, Sei-Min Park, Myung-Soo Kim 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2005, Vol.6 No.1 5 31-40 (10 pages)
Hughes 등은 철 도가니 안에서 수소와 메탄의 혼합물로부터 모발형상의 기상성장 탄소섬유가 생성한 것을 발견하였고, 섬유는 화학기상증착법에 의해 형성된 직경이 약 20m의 탄소 필라멘트형태임을 보고하였다. 이후에 Davis 등이 전자 현미경을 사용하여 나노 크기의 직경을 가진 탄소 필라멘드를 처음으로 관찰하였고, 현재까지 많은 연구자들이 Ni,Fe,Co 및 이러한 금속들의 합금을 촉매로 이용하여 탄소나노섬유를 성장 시키는 기술을 확립하였다. -
액체 차폐물을 이용한 강도변조방사선치료의 구현
오영기, 김진기, 신교철, 김기환, 윤상모, 김재철, 박인규 한국의학물리학회 의학물리 6 Pages
한국의학물리학회 의학물리 2001, Vol.12 No.2 155-160 (6 pages)
3차원적인 타겟 모양을 축소 제작하여 액체 차폐물 속에 넣고 이를 방사선의 경로상에 장착하여 갠트리가 회전하더라도 제작된 타겟의 원래의 방향이 변하지 않도록 중력방향에 따라 회전하게 함으로써 액체 차페물(수은)의 두께차에 의해 방사선의 강도를 변화시킴은 물론 다엽콜리메터를 쓰지 않고도 갠트리 방향의 변화에 따른 방사선조사야의 모양이 자동적으로 이루어지도록 하는 방법을 개발하였다. 갠트리 0$^{circ}$, 45$^{circ}$, 90$^{circ}$ 에서 5cm의 깊이에 필름을 두고 강도변화를 측정한 결과 갠트리가 회전함에 따라...
