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총 190건 검색
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Microfiltration Helical Module들에서 Hollow Fiber의 Diameter과 Curvature 및 Turn수의 변화에 따른 성능변화에 관한 연구
한국막학회 멤브레인 1997, Vol.7 No.2 84-94 (11 pages)
Hollow fiber의 diameter와 curvature 및 turn수 등의 변화에 따른 첫번째 모듈 set와 두번째 모듈 set 사이의 성능비교가 이루어졌다. 모든 실험들은 같은 transmembrane pressure와 막면적당 에너지 소모하에서 수행되었다. 첫번째 모듈 set에 대해서 Dean vortices에 의한 농도분극과 막오염현상의 감소시키는 효과가 매우 작음을 알 수 있었다. 두번째 모듈 set에 대해서 115%의 투과 flux 향상값 (투과 flux 증분 ${ imes}100$/선형 모듈의 투과 flux)을 보였다. 이로부터 두번째 모듈 set가 yeast suspension에 의한 농도분극과... -
Ultrasonographic measurement of optic nerve sheath diameter in normal dogs
Hee-Chun Lee, Ho-Jung Choi, Min-Cheol Choi, Jung-Hee Yoon 대한수의학회 Journal of Veterinary Science 4 Pages
대한수의학회 Journal of Veterinary Science 2003, 제 4권 제 3호 11 265-268 (4 pages)
This study was carried out to assess the feasibility of ultrasonographic measurements of the optic nerve sheath diameter (ONSD) in normal dogs and evaluate the effect of breed, sex, body weight and age on biometry of ONSD. The ONSDs were evaluated in 15 dogs (10-50 months old) with normal eye (7 Yorkshire terrier and 8 Maltese). Ultrasonographic measurements of the ONSD were carried out at a constant position located 5 mm behind the optic disc. Eyes were collected immediately after euthanasia,... -
Pleuritis and pericarditis associated with Klebsiella pneumoniae in a Eurasian beaver (Castor fiber)
Mi Hyeon You , Ji Hyung Kim , Dae Yong Kim , Dennis Kaw Gomez , Tae Sung Jung , Se Chang Park 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 3 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2008, 제 48권 제 4호 16 501-503 (3 pages)
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Mechanical and electrical properties of cement paste incorporated with pitch-based carbon fiber
Inkyu Rhee, Jin Hee Kim, Sang Hee Park, Sungho Lee, Bong Ryeul Ryu, Yoong Ahm Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 4 22-29 (8 pages)
The compressive strength and electrical resistance of pitch-based carbon fiber (CF) in cementitious materials are explored to determine the feasibility of its use as a functional material in construction. The most widely used CFs are manufactured from polyacrylonitrile (PAN-based CF). Alternatively, short CFs are obtained in an economical way using pitch as a precursor in a melt-blown process (pitch-based CF), which is cheaper and more eco-friendly method because this pitch-based CF is basically... -
Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber
Jung Dam Kim, Jae-Seung Roh, Myung-Soo Kim 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 6 51-60 (10 pages)
method were carbonized at temperatures ranging from 800 to 1600oC to investigate their crystalline structure and physical properties as a function of the carbonization temperature. The in-plane crystallite size (La) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800 S/cm. However, the variation in the d002 spacing and stacking height of the... -
Adsorption of volatile organic compounds using activated carbon fiber filter in the automobiles
Hyung Suk Moon, In Soo Kim, Sin Jae Kang, Seung Kon Ryu 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 8 203-209 (7 pages)
The adsorption of volatile organic compounds (VOCs) was carried out using an activated carbon fiber (ACF) filter in an automobile. The adsorption capacities of formaldehyde, toluene, and benzene on an ACF filter were far better than those of a polypropylene (PP) mat filter and combined (PP+activated carbon) mat filter by batch adsorption in a gas bag. In a continuous flow of air containing toluene vapor through an ACF packed bed, the breakpoint time was very long, the length of the unused bed... -
Effect of Process Condition on Tensile Properties of Carbon Fiber
이성호, 김지훈, 구본철, 김준경, 정영식 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.1 5 26-30 (5 pages)
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Nitrogen Removal in Column Wetlands Packed with Synthetic Fiber Treating Piggery Stormwater
Jing Cheng, Youngchul Kim 한국습지학회 한국습지학회지 8 Pages
한국습지학회 한국습지학회지 2016, Vol.18 No.1 9 68-75 (8 pages)
lab-scale polymer synthetic fiber packed column wetlands composing three columns (CW1, CW2 and CW3) with different hydraulic regimes, recirculation frequencies and pollutant loading rates, were operated in 2012. Synthetic fiber tested as an alternative wetland medium for soil mixture or gravel which has been widely used, has very high pore size and volume, so that clogging opportunity can be greatly avoided. The inflow to the wetland was artificial stormwater. All the wetlands achieved effective... -
Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite
Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)
surface morphology after the MWCNT deposition were analyzed using SEM, which revealed a higher density and uniform coverage for the PAMAM-treated CF and the short MWCNTs. The interfacial adhesion of the composite materials was evaluated using the single fiber fragmentation technique. The results indicated an improvement in the interfacial shear strength with the addition of the short-MWCNTs treated with acid solutions and grafted onto the surface of the CF fiber using electrostatic attraction. -
Biologically activated graphite fiber electrode for autotrophic acetate production from CO2 in a bioelectrochemical system
Chae Ho Im, Young Eun Song, Byong-Hun Jeon, Jung Rae Kim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 12 76-80 (5 pages)
Recently, microbial electrosynthesis (MESs) has been highlighted for the purpose of biological CO2 reduction with simultaneous production of intermediates and value-added chemicals. The bioelectrochemical system (BES), which employs microorganisms and a bacterial community as a biocatalyst, has been developed to convert CO2, a greenhouse gas, into liquid biofuels, such as ethanol and butanol, as well as platform chemicals [1]. Several bacterial species, called cathodophilic microorganisms (e.g.,... -
Modification of isotropic coal-tar pitch by acid treatments for carbon fiber melt-spinning
Mi Jung Yoo, Hyo Jun Ko, Yun-Soo Lim and Myung-Soo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 3 247-254 (8 pages)
spinnable precursor pitch for carbon fiber. In the case of thermal treatment only, a relatively high reaction temperature of between 380°C and 400°C was required to obtain a softening point (SP) range of 220°C-260°C and many meso-phase particles were created during the application of high reaction temperature. When nitric acid or sulfuric acid treatment was conducted before the thermal treatment, the precursor pitch with a proper SP range could be obtained at reaction temperatures of 280°C-... -
Influence of hot-pressing pressure on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija and Sharad Chandra Sharma 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 4 25-33 (9 pages)
The prime objective of this research was to study the influence of hot-pressing pressure and matrix-to-reinforcement ratio on the densification of short-carbon-fiber-reinforced, randomly oriented carbon/carbon-composite. Secondary objectives included determination of the physical and mechanical properties of the resulting composite. The ‘hybrid carbon-fiberreinforced mesophase-pitch-derived carbon-matrix’ composite was fabricated by hot pressing. During hot pressing, pressure was varied from 5... -
Tribological properties of carbon fiber-reinforced aluminum composites processed by spark plasma sintering
Ki Hoon Jung, Seungjin Nam, Sung-Soo Kang, Bon-Cheol Ku, Yun Hyuk Bang, Jun Yeon Hwang 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 14 103-106 (4 pages)
The development of light-weight and high-strength materials have gained attention to meet the evergrowing demands for safer and fuel-efficient automobiles. Thus, the importance and applications of composite materials are gradually increasing [1]. In the field of metal-matrix composite manufacturing, reinforcing agents are added to the metal matrix in the form of powders, whiskers, and fibers to improve the mechanical properties of metals [2]. Fibers have been used since the 1950s as structural... -
Ultrasound imaging for age-related differences of lower extremity muscle architecture
Min Kyu Kim, Young Jun Ko, Hwang Jae Lee, Hyun Geun Ha, Wan Hee Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 1호 7 38-43 (6 pages)
Objective: To investigate and compare the size of the rectus femoris (RF), tibialis anterior (TA), and medial gastrocnemius (GMM) using ultrasound (US) imaging in young, elderly, and very elderly groups. Design: Cross sectional study. Methods: This study consisted of 25 young (age 20 years), 24 elderly (age 65-74 years), and 25 very elderly (age 75-90 years) people with no physical dysfunctions. The cross sectional area (CSAs) of the RF and muscle thickness of the TA and GMM were measured at... -
The use of laser Doppler blood flow to assess the effect of acute administration of vitamin D on micro vascular endothelial function in people with diabetes
Jerrold Petrofsky, Faris Alshammari, Iman Akef Khowailed, Riya Lodha, Pooja Deshpande, Praveen Rajaram, Mahendra Gaikwad, Vidhi Vadera 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2013, 제 2권 제 2호 1 63-69 (7 pages)
Objective: To assess the effect of vitamin D administration on the skin blood flow response to occlusion and heat. Design: Cross-sectional study. Methods: Twenty age matched subjects; 10 who had diabetes and 10 who were controls were administered 4,000 IU of vitamin D3 for 3 weeks at breakfast. The function of the endothelial cells was evaluated in 2 ways; first, the response to 4 minutes of vascular occlusion of the skin was measured with a laser Doppler flow meter. Second, the skin blood flow... -
An enhanced immunochromatographic strip test using colloidal gold nanoparticle-labeled dual-type N proteins for detection of antibodies to PRRS virus
Ji Eun Yu, In-Ohk Ouh, Hyeonjeong Kang, Hye-young Lee, Kwang-Myun Cheong, In-Soo Cho, Sang-Ho Cha 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 4호 7 519-527 (9 pages)
Porcine reproductive and respiratory syndrome (PRRS) is recognized as one of the most important infectious diseases causing serious economic loss in the swine industry worldwide. Due to its increasing genetic diversity, a rapid and accurate diagnosis is critical for PRRS control. The immunochromatographic strip test (ICST) is a rapid and convenient type of immunoassay. In this study, an on-site immunochromatographic assay-based diagnostic method was developed for detection of PRRS virus... -
Ovary and vaginal epithelium dynamics during the estrous cycle in Dasyprocta prymnolopha Wagler, 1831
Artur N. Carreiro, Joã, o A. R. A. Diniz, Joyce G. Souza, Dé, bora V. F. Araú, jo, Rô, mulo F. F. Dias, Liliane M. S. Aze 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 3호 14 446-451 (6 pages)
The objective of the present study was to monitor and characterize morphological alterations in ovaries of agouti (Dasyprocta prymnolopha), reared in captivity, by using abdominal ultrasonography. All animals underwent daily vaginal cytological examination to identify the current cycle phase. For each phase of the estrous cycle, ultrasound examinations were carried out to identify and describe the morphology of both ovaries. Topographic parameters in an ultrasound window were established to... -
Air assisted lamellar keratectomy for the corneal haze model
Soohyun Kim, Young Woo Park, Euiri Lee, Sang Wan Park, Sungwon Park, Jong Whi Kim, Je Kyung Seong, Kangmoon Seo 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 3호 13 349-356 (8 pages)
To standardize the corneal haze model in the resection depth and size for efficient corneal haze development, air assisted lamellar keratectomy was performed. The ex vivo porcine corneas were categorized into four groups depending on the trephined depth: 250 μm (G1), 375 μm (G2), 500 μm (G3) and 750 μm (G4). The stroma was equally ablated at the five measurement sites in all groups. Significant differences were observed between the trephined corneal depths for resection and ablated corneal...
