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A Kinetic Analysis of the Thermal Degradation of Pyrolytic Heavy Oils obtained from Kiln Pyrolysis Process
Kyong Hwan Lee, Woo-Teck Kwo, Sea Cheon Oh 한국열환경공학회 열환경공학 8 Pages
한국열환경공학회 열환경공학 2011, 제 8권 2호 1 1-8 (8 pages)
degradation of pyrolytic heavy oil obtained from mixed waste plastics by kiln pyrolysis process has been studied. Distinct mass changes over the temperature of 50~400 ℃ were investigated and the rapid increases in the conversion were seen over 100 ℃. From this work, it was also found that the overall reaction orders were 1.0~1.25, whereas the apparent activation energies were 24.4~26.9 ..PAGE:7... the thermal degradation of pyrolytic heavy oils obtained from mixed waste plastics by kiln pyrolysis process has been studied by conventional thermogravimetric technique with various heating rates in nitrogen atmosphere. Results of kinetic analysis show that the activation energies are 24.4~26.5 kJ/mol and the reaction orders are 1.0~1.25, respectively. To verify the effectiveness of the kinetic analysis method used in this work, the experimental values were compared with those of the numerical... -
Alpha-Asarone, a Major Component of Acorus gramineus, Attenuates Corticosterone-Induced Anxiety-Like Behaviours via Modulating TrkB Signaling Process
BombiLee, BongjunSur, MijungYeom, InsopShim, HyejungLee, Dae-HyunHahm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.3 1 191-200 (10 pages)
, Attenuates Corticosterone-Induced Anxiety-Like Behaviours via Modulating TrkB Signaling Process Bombi Lee 1 , Bongjun Sur 2 , Mijung Yeom 1 , Insop Shim 1,2 , Hyejung Lee 1,2 , and Dae-Hyun Hahm 1,2 1Acupuncture and Meridian Science Research Center, 2The Graduate School of Basic Science of Korean Medicine, College of Korean Medicine, Kyung Hee University, Seoul 130-701, Korea We investigated... We investigated the anxiolytic-like activity of α-asarone (AAS) from Acorus gramineus in an experimental rat model of anxiety induced by repeated administration of the exogenous stress hormone corticosterone (CORT). The putative anxiolytic effect of AAS was studied in behavioral tests of anxiety, such as the elevated plus maze (EPM) test and the hole-board test (HBT) in rats. For 21 consecutive days, male rats received 50, 100, or 200 mg/kg AAS (i.p.) 30 min prior to a daily injection of CORT.... -
Development and Evaluation of Loop-Mediated Isothermal Amplification Assay for Rapid Detection of Tylenchulus semipenetrans Using DNA Extracted from Soil
한국식물병리학회 The Plant Pathology Journal 9 Pages
한국식물병리학회 The Plant Pathology Journal 2017, 33권 2호 10 184-192 (9 pages)
cal method is time-consuming and requires specialized knowledge. PCR-based detection methods require expen- sive instruments and equipment (e.g., thermal cycling). One of the most promising methods for detection of T. semipenetrans is LAMP, which is a simpler operation, more rapid and sensitive reaction, and easier detection compared with conventional PCR. In this study, we de- veloped a... Tylenchulus semipenetrans is an important and widespread plant-parasitic nematode of citrus worldwide and can cause citrus slow decline disease leading to significant reduction in tree growth and yield. Rapid and accurate detection of T. semipenetrans in soil is important for the disease forecasting and management. In this study, a loop-mediated isothermal amplification (LAMP) assay was developed to detect T. semipenetrans using DNA extracted from soil. A set of five primers was designed from... -
Influence of laminated orientation on the mechanical and thermal characteristics of carbon-fiber reinforced plastics
Hee-Jae Shin, Lee-Ku Kwac, Min-Sang Lee, Hong-Gun Kim 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.4 3 241-246 (6 pages)
and asymmetric ply (0°/15°, 0°/30°, 0°/45°, and 0°/90°), through drop-weight impact tests. Further, the thermal properties of the specimens were measured using an infrared camera. Correlations between the absorbed impact energy, impact strength, and thermal properties as determined by the drop-weight impact tests were analyzed. These analyses revealed that the absorbed impact energy of... were evaluated, including symmetric ply (0°/0°, ?15°/+15°, ?30°/+30°, ?45°/+45°, and ?90°/+90°) and asymmetric ply (0°/15°, 0°/30°, 0°/45°, and 0°/90°), through drop-weight impact tests. Further, the thermal properties of the specimens were measured using an infrared camera. Correlations between the absorbed impact energy, impact strength, and thermal properties as determined by the drop-weight impact tests were analyzed. These analyses revealed that the absorbed impact energy... -
Bulk graphite: materials and manufacturing process
Sang-Min Lee, Dong-Su Kang and Jea-Seung Roh 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 1 135-146 (12 pages)
products requir- ing high electrical and thermal conductivity, such as steelmaking electrode bars and aluminum smelting electrodes [20,21,27,28]. Table 2 shows the coeffcient of thermal expansion (CTE) and CTE ratio (anisotropic ratio) of nuclear graphite, electrode graphite and pyrolytic graphite. 4. Manufacturing Process of Bulk Graphite The general manufacturing process of bulk graphite is... Graphite can be classified into natural graphite from mines and artificial graphite. Due to its outstanding properties such as light weight, thermal resistance, electrical conductivity, thermal conductivity, chemical stability, and high-temperature strength, artificial graphite is used across various industries in powder form and bulk form. Artificial graphite of powder form is usually used as anode materials for secondary cells, while artificial graphite of bulk form is used in steelmaking... -
Mechanical and thermal properties of MWCNT-reinforced epoxy nanocomposites by vacuum assisted resin transfer molding
Si-Eun Lee, Seho Cho, Young-Seak Lee 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 4 32-37 (6 pages)
2014 ..PAGE:2 Mechanical and thermal properties of MWCNTs/epoxy nanocomposites 33 http://carbonlett.org which could detrimentally affect the properties of the fnal product by creating voids, are produced in the epoxy mixture during rigorous mixing of the epoxy and hardener. After the bubbles are completely removed, the MWCNT/epoxy mix- tures are transferred into metal molds by the VARTM process... vacuum assisted resin transfer molding (VARTM) method. The mechanical properties, fracture surface morphologies, and thermal stabilities of these nanocomposites are evaluated for epoxy resins with various amounts of MWCNTs. Composites consisting of different amounts of MWCNTs displayed an increase of the work of adhesion between the MWCNTs and the matrix, which improved both the tensile and impact strengths of the composites. The tensile and impact strengths of the MWCNT/epoxy composite improved... -
Morphological optimization of process parameters of randomly oriented carbon/carbon composite
Thakur Sudesh Kumar Raunija, Sushant Krunal Manwatkar, Sharad Chandra Sharma, Anil Verma 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 3 25-31 (7 pages)
hot-pressed C/C composite was found to be cost effec- tive [6]. But the mechanical properties of this C/C composite are moderate due to discrete length reinforcement. However, its thermal and electrical properties are excellent [17]. Various ap- plications where moderate mechanical properties are suffcient, such as bipolar plates, are good targets for this type of composite system. Variants of... A microstructure analysis is carried out to optimize the process parameters of a randomly oriented discrete length hybrid carbon fiber reinforced carbon matrix composite. The composite is fabricated by moulding of a slurry into a preform, followed by hot-pressing and carbonization. Heating rates of 0.1, 0.2, 0.3, 0.5, 1, and 3.3°C/min and pressures of 5, 10, 15, and 20 MPa are applied during hot-pressing. Matrix precursor to reinforcement weight ratios of 70:30, 50:50, and 30:70 are also... -
Modifications of mechanical, thermal, and electrical characteristics of epoxy through dispersion of multi-walled carbon nanotubes in supercritical carbon dioxide
MGH ZAIDI, Sanjeev Joshi, Manoj Kumar, Deepak Sharma, Ashwin Kumar, Sarfaraz Alam, Prakash Sah 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.4 4 218-227 (10 pages)
measurements [33]. To address the desperate need for effective dispersion of nanotubes into an epoxy matrix together with strong interfacial adhesion to achieve CECs with improved mechanical, thermal, and electrical properties, a SCC assisted process of dispersion of MWCNTs into epoxy has been developed. The infuence of the concentration (phr) of MWCNTs, ranging from 0.1 to 0.3, on their... -
Polymerization and Thermal Characteristics of Acrylonitrile/Dicyclohexy lammonium2-Cyanoacrylate Copolymers for Carbon Fiber Precursors
김기영, 박우리, 정영식, 신동근, 한진욱 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.1 6 31-38 (8 pages)
and pitch precursors [1]. The nitrile (CN) groups are preferably positioned in PAN polymers for cyclization of nitrile groups to produce the ladder structures during thermal stabilization, which is the first stage to covert precursor fibers to carbon fibers followed by high temperature carbonization process. However, PAN homopolymers are not suitable for use as carbon fiber precursors because of a... -
Thermal Emissivity of Nuclear Graphite as a Function of its Oxidation Degree (3): Structural Study using Scanning Electron Microscope and X-Ray Diffraction
서승국, 노재승, 김석환, 기세환, 김응선 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.1 2 8-15 (8 pages)
oC. A standard process for producing graphites includes the preparation of a filler and binder from raw materials, mixing, shaping, firing, and graphitization. The grain size of synthetic graphite is typically determined by the particle size of the filler [4,5]. Thermal emissivity of nuclear graphite is of great importance for rapid emission of heat, which is critical to cope effectively with the...