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전체 선택해제
총 518건 검색
본문검색 결과만 보기
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Reaction Raters for the Oxidation of Pitch based Carbon Fibers in Air and Carbon Dioxide Gas
Jae-Seung Roh 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2003, Vol.4 No.4 5 185-191 (7 pages)
탄소섬유와 산화반응에 대한 연구는 섬유의 종류 및 반응기체의 종류, 그리고 가장 중요한 함수인 온도에 따른 산화반응 특성 등에 대하여 진행되고 왔다. 일반적으로 반응온도가 증가할수록 산화속도는 증가하며, 반응 기체별로 산소와 수증기 분위기에서 산화반응은 빠르게 일어난다고 알려져 있다. 또한, 탄소섬유와 제조공정에 따른 흑연화 정도가 클수록 내산화성은 증가된다. 탄소재료의 산화반응을 설명한 대부분의 논문은 TGA를 이용한 연구이다. -
Effects of $NH_4F$ Concentrations of Electrolytes and Reaction Time in the Anodic Oxidation Process on the Photovoltaic Properties of Back-Illuminated DSSC
Chang. Ho, Kao. Mu-Jung, Kuo. Chin-Guo, Chou. Cheng-Yi 한국정밀공학회 International journal of precision engineering and manufacturing 6 Pages
한국정밀공학회 International journal of precision engineering and manufacturing 2014, Vol.15 No.6 1187-1192 (6 pages)
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Chlorination Reaction Behavior of Zircaloy-4 Hulls: A Preliminary Study on the Effect of the Oxidation Process on the Reaction Rate
전민구, 이창화, 허철민, 이유리, 최용택, 강권호, 박근일, Jeon. Min Ku, Lee. Chang Hwa, Heo. Chul Min, Lee. You Lee, Choi. Yong Taek, Kang. Kweon Ho, Park. Geun Il 한국방사성폐기물학회 방사성폐기물학회지 7 Pages
한국방사성폐기물학회 방사성폐기물학회지 2013, Vol.11 No.1 69-75 (7 pages)
본 연구에서는 산화 공정이 Zircaloy-4 (Zry-4) 피복관의 염소화 반응 속도에 미치는 영향을 연구하기 위하여 Zry-4 피복관의 염소화 반응 실험을 수행하였다. 2시간 마다 반응 생성물을 회수하며 총 6 시간 동안 염소화 반응 실험을 수행하였고, 이를 통해 500도에서 10 시간 동안 산화된 Zry-4의 경우 초기 0-2 시간 구간에서 반응 속도가 현저히 저하되는 것을 확인하였다. 반응 잔류물은 fresh Zry-4와 산화된 Zry-4에서 각각 초기무게의 0.95, 1.65wt%로 확인되었다. 회수된 Zr의 순도는 두 경우 모두 99.61wt%로 동일하였다. 반응... -
Effect of Electrochemical Redox Reaction on Biochemical Ammonium Oxidation and Chemical Nitrite Oxidation
Jeon. Bo-Young, Seo. Ha-Na, Kang. Seung-Won, Park. Doo-Hyun 한국미생물생명공학회 Journal of microbiology and biotechnology 9 Pages
한국미생물생명공학회 Journal of microbiology and biotechnology 2010, Vol.20 No.3 485-493 (9 pages)
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Effects of Oxidation Reduction Potential and Organic Compounds on Anammox Reaction in Batch Cultures
Viet. Truong Nguyen, Behera. Shishir Kumar, Kim. Ji-Won, Park. Hung-Suck 대한환경공학회 Environmental engineering research 6 Pages
대한환경공학회 Environmental engineering research 2008, Vol.13 No.4 210-215 (6 pages)
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N3S-ligated Copper(II) Complex Catalyzed Selective Oxidation of Benzylic Alcohols to Aldehydes under Mild Reaction Conditions
Dharmalingam. Sivanesan, Koo. Eunhae, Yoon. Sungho, Park. Gyoosoon 대한화학회 Bulletin of the Korean Chemical Society 6 Pages
대한화학회 Bulletin of the Korean Chemical Society 2014, Vol.35 No.3 715-720 (6 pages)
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Kinetics and Mechanism of Electron Transfer Reaction: Oxidation of Sulfanilic Acid by N-Chloro-p-Toluene Sulfonamide in Acid Perchlorate Medium
Sailani. Riya, Bhasin. Meneka, Khandelwal. C.L., Sharma. P.D. 대한화학회 Bulletin of the Korean Chemical Society 6 Pages
대한화학회 Bulletin of the Korean Chemical Society 2014, Vol.35 No.1 111-116 (6 pages)
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Oxidation of Aromatic Aldehydes with Tetrabutylammonium Fluoride:Competition with the Cannizzaro Reaction
Chung. Kyoo-Hyun, Lee. Jae Hak, Chi. Dae Yoon, Moon. Byung-Chul, Lim. Choong Hwan, Kim. Jin Pil 대한화학회 Bulletin of the Korean Chemical Society 3 Pages
대한화학회 Bulletin of the Korean Chemical Society 2006, Vol.27 No.8 1203-1205 (3 pages)
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The Reaction of Alkylphosphite with Tris( p-bromophenyl)aminium hexachloroantimonate: An Efficient Chemical One Electron Oxidation for the Carbocation Formation
이석근, Lee. Seok Geun 대한화학회 Bulletin of the Korean Chemical Society 2 Pages
대한화학회 Bulletin of the Korean Chemical Society 2000, Vol.21 No.1 31-32 (2 pages)
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Organic Sonochemsitry. Ne Ultrasound Reaction Apparatus Applied for Oxidation of Alcohols with $KMnO_4$
Han. Byung Hee, Shin. Dae Hyun, Jang. Dong Gyu, Kim. Sung Nam 대한화학회 Bulletin of the Korean Chemical Society 2 Pages
대한화학회 Bulletin of the Korean Chemical Society 1990, Vol.11 No.2 157-158 (2 pages)
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Evidence of Radical Ion Pair for Singlet Oxygen Reaction of Bilirubin and Related Oxopyrromethenes. Oxidation Potential of Bilirubin and Related Oxopyrromethenes
Park. Yong-Tae, Lee. Sang-Wan, Song. Myung-Seub, Bae. Jun-Woong, Chung. Mi-Sik 대한화학회 Bulletin of the Korean Chemical Society 2 Pages
대한화학회 Bulletin of the Korean Chemical Society 1990, Vol.11 No.1 77-78 (2 pages)
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Reaction-Bonded Al2O3 Ceramics Using Oxidation of Al Alloy Powder
Lee. Hyun-Kwuon 한국재료학회 한국재료학회지 7 Pages
한국재료학회 한국재료학회지 2014, Vol.24 No.5 236-242 (7 pages)
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Development of Estimation Methods of Skin Oxidation and Evaluation of Anti-Oxidative Effects of Genistein in Topical Formulations
SeongYeonKim, YeonJooNa, DongjuKim, YeongseokKim, HyeongMinKim, Sung-HaHwang, JiyeonKwak, Hyo-JeongKuh, JaehwiLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 5 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2012, Vol.16 No.3 9 205-209 (5 pages)
The objective of the present study was to establish the method of measurement of hydrogen peroxide and to estimate the anti-oxidative effect of genistein in the skin. UVB induced skin oxidation and anti-oxidative effect of genistein formulations were evaluated by determining levels of hydrogen peroxide. The mechanism involved in the determination of hydrogen peroxide is based on a color reaction between ferric ion (Fe3＋) and xylenol orange, often called FOX assay and subsequent monitoring of... -
Increased Rate of Palmitate Oxidation in Adults Female: Comparison with Peri-pubertal Young Female Rats
SeYoungLee, Jong-YeonKim, Yong-WoonKim, So-YoungPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2006, Vol.10 No.5 9 283-288 (6 pages)
of palmitate oxidation in the gastrocnemius red was correlated inversely with intra-abdominal fat mass in the 5-week-old male and female rats, whereas the palmitate oxidation rate was positively correlated with fat mass in the liver and gastrocnemius red in the 50-week-old rats. HOMA-IR and plasma insulin levels were positively correlated with intra-abdominal fat mass in the pooled 50-week-old male and female rats, but this correlation was not apparent in 5-week-old rats. In summary, the rate of... -
What is the Key Step in Muscle Fatty Acid Oxidation after Change of Plasma Free Fatty Acids Level in Rats?
Kyung-OhDoh, Sang-DugSuh, Jong-YeonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2005, Vol.9 No.3 7 173-178 (6 pages)
similar extent as palmitate oxidation by a decrease of plasma FFA level. This suggested that β-oxidation might be an important process to regulate fatty acid oxidation at the early period of plasma FFA change. Citrate synthase activity was not altered by the change of plasma FFA level. In conclusion, the critical step in fatty acids oxidation of skeletal muscles by the change of plasma FFA level by acipimox in fasting rats might be the β-oxidation step rather than CPT1 and TCA cycle pathways. -
Fuctional Relationship between Rate of Fatty Acid Oxidation and Carnitine Palmitoyl Transferase I Activity in Various Rat Tissues
Yu-LeeCho, Kyung-OhDo, Tae-DongKwon, Eung-ChanJang, Keun-MiLee, Suck-KangLee, Jong-YeonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 4 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2003, Vol.7 No.4 3 207-210 (4 pages)
muscle followed by liver. Brain tissue showed the lowest CPT I activity as well as lipid oxidation rate, although the values were not significantly different from those of kidney and white gastrocnemius muscle. Therefore, lipid oxidation rate was highly(p＜0.001) related to CPT I activity. Lipid oxidation rate is variable, depending on tissue types, and is highly (p＜0.001) related to CPT I activity. CPT I activity may be a good marker to indicate lipid oxidation capacity in various tissues. -
Impact of single metal oxide and coal ash on secondary ultrafine particle generation through SO2 and NO2 heterogeneous reaction
Ru-Jiao Song, Zi-Xiang Xu, Joo-Chang Park, Li-Hua Xu, Hyung-Taek Kim 한국열환경공학회 열환경공학 19 Pages
한국열환경공학회 열환경공학 2020, 제 15권 1호 4 28-46 (19 pages)
chromatography (IC). SO2 and NO2 could react on oxides to form secondary particles and the order of reactivity of mineral oxides under laboratory reaction conditions is: Al2O3>MgO>CaO>>SiO2, Fe2O3. NO2 has a synergistic effect on the heterogeneous reaction of SO2 on Al2O3 in the presence of O2. The synergistic effect of SO2 and NO2 on Al2O3 is further enhanced in the case of high relative humidity (RH) and in the presence of NH3. The reaction on Al2O3 under different gas concentration ratios is... -
Effect of added mesophase pitch during the pitch synthesis reaction of PFO
Ji Hong Kim, Jong Gu Kim, Chul Wee Lee, Ki Bong Lee, Ji Sun Im 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 7 48-54 (7 pages)
is an enhancement of thermal stability due to the high thermal property of the additive; the other is that the volatile compounds that were removed by vaporization of PFO during the thermal reaction can participate in the pitch synthesis reaction (PFO→pitch) more efficiently. The effect differs according to the amount of the additive. When the amount of the additive is less than 7 wt%, the first effect is dominant, whereas the second effect is dominant when the additive amount exceeds 10 wt%. -
Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method
Dong-Kyu Kim, Kay-Hyeok An, Yun Hyuk Bang, Lee-Ku Kwac, Sang-Yub Oh, Byung-Joo Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 4 32-39 (8 pages)
of electrochemical oxidation treatments of carbon fibers (CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The mechanical interfacial shear strength of the... -
Microstructural changes of polyacrylonitrile-based carbon fibers (T300 and T700) due to isothermal oxidation (1): focusing on morphological changes using scanning electron microscopy
Seong-Moon Oh, Sang-Min Lee, Dong-Su Kang, Jae-Seung Roh 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.18 3 18-23 (6 pages)
than that of T700 fibers. The diameter of T700 fibers decreased linearly with increasing burn-off. The diameter of T300 also decreased with increasing burn-off but at slower rates over time. Cross-sectional observations after oxidation reactions revealed hollow cores in the longitudinal direction for both T300 and T700 fibers. The formation of hollow cores after oxidation can be traced to differences in the fabrication process such as the starting material and final heat treatment temperature. -
One-step synthesis of dual-transition metal substitution on ionic liquid based N-doped mesoporous carbon for oxygen reduction reaction
Ulziidelger Byambasuren, Yukwon Jeon, Dorjgotov Altansukh, Yunseong Ji, Yong-Gun Shul 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 8 53-64 (12 pages)
linear sweep was recorded in an acidic solution to compare the ORR catalytic activities values for the use in the PEMFC system. The dual transition metal promotion improved the ORR activity compared with the single transition metal promotion, due to the increase in the quaternary nitrogen species from the structural change by the dual metals. The effect of different ratio of the dual metals into the N doped carbon were examined to evaluate the activities of the oxygen reduction reaction. -
An overview of new oxidation methods for polyacrylonitrile?based carbon fibers
Hye Kyoung Shin, Mira Park, Hak-Yong Kim and Soo-Jin Park 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 2 11-18 (8 pages)
in determining the mechanical properties of the final carbon fibers, but the most commonly used methods, such as thermal treatment (200°C to 300°C), tend to waste a great deal of process time, money, and energy. There is therefore a need to develop more advanced oxidation methods for PAN precursor fibers. In this review, we assess the viability of electron beam, gamma-ray, ultra-violet, and plasma treatments with a view to advancing these areas of research and their industrial application.
