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전체 선택해제
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A 3D Model for Magnetorheological Fluid that Considers Neighboring Particle Interactions in 2D Skewed Magnetic Fields
Jang. Kyung-In, Seok. Jong-Won, Min. Byung-Kwon, Lee. Sang-Jo 한국정밀공학회 International journal of precision engineering and manufacturing 4 Pages
한국정밀공학회 International journal of precision engineering and manufacturing 2009, Vol.10 No.1 115-118 (4 pages)
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RHEOLOGICAL PROPERTIES OF MAGNETIC PARTICLE SUSPENSIONS
Kwon. T.M., Choi. H.J., Jhon. M.S. 한국자기학회 韓國磁氣學會誌 5 Pages
한국자기학회 韓國磁氣學會誌 1995, Vol.5 No.5 667-671 (5 pages)
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Electrochemical Assay for Glycated Hemoglobin based on the Magnetic Particle-supported Concentration Coupled to Boronate-diol Interactions
Son. Seo-Young, Han. Yong-Duk, Lee. Kyeong-Hee, Yoon. Hyun-C. 대한화학회 Bulletin of the Korean Chemical Society 4 Pages
대한화학회 Bulletin of the Korean Chemical Society 2010, Vol.31 No.7 2103-2106 (4 pages)
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A novel mycotoxin purification system using magnetic nanoparticles for the recovery of aflatoxin B1 and zearalenone from feed
Hyun-Jung Kim, Sung-Hee Kim, Jin-Kyu Lee, Cheong-Up Choi, Hee-Soo Lee, Hwan-Goo Kang*, Sang-Ho Cha* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 4호 5 363-369 (7 pages)
novel tool for purifying two mycotoxins, aflatoxin B1 (AFB1) and zearalenone (ZEN), in feed. This system utilized monoclonal antibodies (mAbs) against AFB1 and ZEN, and magnetic nanoparticles (MNPs). Among ten MNPs with different diameters and functional groups, a 100-nm diameter MNP (fMA) conjugated to an amine group (-NH2) was found to be optimum for coupling with mAbs. The optimal mAb concentrations for coupling to the fMA along with mycotoxin purification capacities of the fMA-mAb conjugates... -
Cellular uptake of magnetic nanoparticle is mediated through energy-dependent endocytosis in A549 cells
Jun-Sung Kim, Tae-Jong Yoon, Kyeong-Nam Yu, Mi Suk Noh, Minah Woo, Byung-Geol Kim, Kee-Ho Lee, Byung-Hyuk Sohn, Seung-Bum Park, 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2006, 제 7권 제 4호 3 321-326 (6 pages)
cells were pretreated with different metabolic inhibitors. Our results revealed that low temperature disturbed the uptake of magnetic nanoparticles into the cells. Metabolic inhibitors also prevented the delivery of the materials into cells. Use of TEM clearly demonstrated that uptake of the nanoparticles was mediated through endosomes. Taken together, our results demonstrate that magnetic nanoparticles can be internalized into the cells through an energy-dependent endosomal-lysosomal mechanism. -
Extremely Low Frequency Magnetic Field Modulates the Level of Neurotransmitters
YoonHeeChung, YoungJooLee, HoSungLee, SuJinChung, CheolHeeLim, KeonWoongOh, UyDongSohn, EonSubPark, JiHoonJeong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.1 3 15-20 (6 pages)
This study was aimed to observe that extremely low frequency magnetic field (ELF-MF) may be relevant to changes of major neurotransmitters in rat brain. After the exposure to ELF-MF (60 Hz, 2.0 mT) for 2 or 5 days, we measured the levels of biogenic amines and their metabolites, amino acid neurotransmitters and nitric oxide (NO) in the cortex, striatum, thalamus, cerebellum and hippo-campus. The exposure of ELF-MF for 2 or 5 days produced significant differences in norepinephrine and vanillyl... -
Two clinical isolates of Mycoplasma hyosynoviae showed differing pattern of lameness and pathogen detection in experimentally challenged pigs
Jo?o Carlos Gomes-Neto, Matthew Raymond, Leslie Bower, Alejandro Ramirez, Darin M. Madson, Erin L. Strait, Everett L. Rosey, Vic 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2016, 제 17권 제 4호 7 489-496 (8 pages)
Mycoplasma (M.) hyosynoviae is known to colonize and cause disease in growing-finishing pigs. In this study, two clinical isolates of M. hyosynoviae were compared by inoculating cesarean-derived colostrum-deprived and specific-pathogen-free growing pigs. After intranasal or intravenous inoculation, the proportion and distribution pattern of clinical cases was compared in addition to the severity of lameness. Tonsils were found to be the primary site of colonization, while bacteremia was rarely... -
Quantitative real-time polymerase chain reaction for detecting Mycoplasma hyosynoviae and Mycoplasma hyorhinis in pen-based oral, tonsillar, and nasal fluids
João Carlos Gomes Neto, Leslie Bower, Barbara Z. Erickson, Chong Wang, Matthew Raymond, Erin L. Strait 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 2호 9 195-201 (7 pages)
Mycoplasma (M.) hyorhinis and M. hyosynoviae are pathogens known to cause disease in pigs post-weaning. Due to their fastidious nature, there is increased need for culture-independent diagnostic platforms to detect these microorganisms. Therefore, this study was performed to develop and optimize quantitative real-time PCR (qPCR) assays to rapidly detect M. hyorhinis and M. hyosynoviae in pen-based oral fluids as well as nasal and tonsillar fluids as proxies for samples used in swine herd... -
Distribution and accumulation of Cy5.5-labeled thermally cross-linked superparamagnetic iron oxide nanoparticles in the tissues of ICR mice
Jin Joo Hue, Hu-Jang Lee, Sangyong Jon, Sang Yoon Nam, Young Won Yun, Jong-Soo Kim, Beom Jun Lee 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2013, 제 14권 제 4호 14 473-479 (7 pages)
Free Cy5.5 dye and Cy5.5-labeled thermally cross-linked superparamagnetic iron oxide nanoparticles (TCL-SPION) have been routinely used for in vivo optical imaging. However, there is little information about the distribution and accumulation of free Cy5.5 dye and Cy5.5-labeled TCL-SPION in the tissues of mice. Free Cy5.5 dye (0.1 mg/kg body weight) and Cy5.5-labeled TCL-SPION (15 mg/kg body weight) were intravenously injected into the tail vein of ICR mice. The biodistribution and accumulation... -
Efficacy of nano-hydroxyapatite prepared by an aqueous solution combustion technique in healing bone defects of goat
Samit Kumar Nandi, Biswanath Kundu*, Samir Kumar Ghosh, Dipak Kumar De, Debabrata Basu 대한수의학회 Journal of Veterinary Science 10 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 2호 9 183-192 (10 pages)
The present study was undertaken to evaluate porous hydroxyapatite (HAp), the powder of which was prepared by a novel aqueous solution combustion technique, as a bone substitute in healing bone defects in vivo, as assessed by radiologic and histopathologic methods, oxytetracycline labeling, and angiogenic features in Bengal goat. Bone defects were created in the diaphysis of the radius and either not filled (group I) or filled with a HAp strut (group II). The radiologic study in group II showed... -
Comparative in vivo biodistributions of nanoparticles and polymers of 177lutetium-labeled hyaluronic acids in mice during 28 days
Chunmei Lin , Ju-yeon Jeong , Jung-min Yon , Seul Gi Park , Lee Wha Gwon , Jong-geol Lee , In-jeoung Baek , Sang-soep Na 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 7 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2017, 제 57권 제 2호 5 105-111 (7 pages)
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Short Communication : Distribution and accumulation of 177Lu-labeled thermally cross-linked superparamagnetic iron oxide nanoparticles in the tissues of ICR mice
Jin Joo Hue , Hu Jang Lee , Sang Yoon Nam , Jong Soo Kim , Beom Jun Lee , Young Won Yun 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 4 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2015, 제 55권 제 1호 9 57-60 (4 pages)
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Original Article : Evaluation of thermally cross-linked superparamagnetic iron oxide nanoparticles for the changes of concentration and toxicity on tissues of Sprague-Dawley rats
Jin Joo Hue , Hu Jang Lee , Sang Yong Jon , Sang Yoon Nam , Young Won Yun , Jong Soo Kim , Beom Jun Lee 대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 8 Pages
대한수의학회 Korean Journal of Veterinary Research(구 대한수의학회지) 2014, 제 54권 제 4호 8 245-252 (8 pages)
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피하지방 및 피하지방의 분획과 관련된 임상적 의의에 관한 고찰
이윤재(Yoon Jae Lee), 황덕상(Deok Sang Hwang), 이창훈(Chang Hoon Lee), 이경섭(Kyung Sub Lee) 한방비만학회 대한한방비만학회지 11 Pages
한방비만학회 대한한방비만학회지 2007, 제 7권 제 2호 2 15-25 (11 pages)
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대학 과학 교양 강좌를 위한 거대사 교육 콘텐츠 분석
김가혜, 김성수, 손정주 한국교원대학교 뇌기반교육연구소 Brain, Digital, & Learning 8 Pages
한국교원대학교 뇌기반교육연구소 Brain, Digital, & Learning 2016, 제 6권 제 2호 1 31-38 (8 pages)
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Scant Extracellular NAD Cleaving Activity of Human Neutrophils is Down-Regulated by fMLP via FPRL1
Md.AshrafulHasan, Md.TipuSultan, Won-GyunAhn, Yeon-JaKim, Ji-HyeJang, Chang-WonHong, Dong-KeunSong 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2014, Vol.18 No.6 8 497-502 (6 pages)
Extracellular nicotinamide adenine dinucleotide (NAD) cleaving activity of a particular cell type determines the rate of the degradation of extracellular NAD with formation of metabolites in the vicinity of the plasma membrane, which has important physiological consequences. It is yet to be elucidated whether intact human neutrophils have any extracellular NAD cleaving activity. In this study, with a simple fluorometric assay utilizing 1,N6-ethenoadenine dinucleotide (etheno-NAD) as the... -
Interaction of 17β-Estradiol with EGF and IGF-I on Proliferation and Pi Uptake in Primary Cultured Rabbit Renal Proximal Tubular Cells
HoJaeHanYeunHeeLee 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.4 11 493-501 (9 pages)
The most significant direct role of estrogen in vivo is its ability to elicit receptor-mediated cellular proliferation in mammalian target tissues. However, the mechanism by which exogenously added estrogen causes the neoplastic transformation of renal cortical cells is yet to be uncovered. The present study was designed to evaluate interaction of 17-estradiol (E2) with epidermal growth factor (EGF) and insulin-like growth factor-I (IGF-I) on proliferation and Pi uptake in primary... -
Regulatory Mechanisms of Angiotensin II on the Na+/H+ Antiport System in Rabbit Renal Proximal Tubule Cells. I. Stimulatory Effects of ANG II on Na+ Uptake
HoJaeHan, HyunJuKoh, SooHyunPark 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 11 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.4 8 413-423 (11 pages)
The importance of the kidney in the development of hypertension was first demonstrated by Goldblatt and his colleagues more than fifty years ago. Many hormones and other regulatory factors have been proposed to play a major role in the development of hypertension. Among these factors angiotensin II (ANG II) is closely involved in renal hypertension development since it directly regulates Na+ reabsorption in the renal proximal tubule. Thus the aim of the present study was to examine signaling... -
慢性精神分裂病 患者에서 電氣衝擊療法이 腦脊髓液 5-HT와 5-HIAA 濃度에 미치는 影響에 관한 研究
권준수, 김기웅, 우종인 대한신경정신의학회 신경정신의학 10 Pages
대한신경정신의학회 신경정신의학 1992, 제 31권 제 5호 3 846-855 (10 pages)
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β-Estradiol이 토끼 근위 세뇨관 상피세포의 성장에 미치는 영향
박상호(Sang-Ho Park), 정주호(Joo-Ho Chung), 고계창(Kye-Chang Ko), 정지창(Jee-Chang Jung) 대한약리학회 대한약리학잡지 12 Pages
대한약리학회 대한약리학잡지 1993, 제 29권 제 1호 8 73-84 (12 pages)
Steroid hormone의 하나인 β-estradiol이 serum-free medium에서 배양한 토끼의 신장 근위세뇨관 상피세포의 세포성장과 기능에 미치는 영향을 관찰한 바 다음과 같은 결과를 얻었다 1. Serum-free medium에서 토끼의 신장 근위세뇨관 상피세포는 β-estradiol 1 nM의 농도에서 유의한 세포 성장 촉진 효과를 나타내었고, β-estradiol 10 nM이상의 농도에서는 세포성장이 억제되었다. 2. β-Estradiol은 serum-free medium에서 성장촉진인자의 하나인 hydrocortisone을 뺀 조건하에서 세포 성장을 증가시키었다. 3. β-Estradiol은... -
Effects of Insulin and IGFS on Growth and Functional Differentiation in Primary Cultured Rabbit Kidney Proximal Tubule Cells -Growth and membrane transport-
Han, Ho-Jae, Park, Kwon-Moo, 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 2호 1 191-202 (12 pages)
The purpose of this study was to compare effects of insulin and IGFs on growth, apical membrane enzyme activities and membrane transport systems of primary cultured rabbit kidney proximal tubule cells. Results were as follows: 1. Insulin and IGF-I produced significant growth stimulatory effects at 5 X 10-10M. IGF-II(5 X 10 -10 M) did not stimulate significant cell growth. 2. Insulin stimulated the phosphorylation of a 97 KD protein. It was difficult to determine whether this band represents... -
Bioreactor를 이용한 골 조직 공학에 대한 고찰
전재윤, 정주련, 심광섭, 박창주, 황경균 대한치과이식임플란트학회 Journal of Dental Implant Research 4 Pages
대한치과이식임플란트학회 Journal of Dental Implant Research 2014, 제 33권 3호 1 63-66 (4 pages)
재생의학의 한 분야인 조직공학을 이용한 조직 재생의 기본 개념 은 인체내의 장기 및 조직을 구성하는 기본 단위인 세포, 담체, 성장 인자, 신생혈관 형성을 생명의학적인 방법과 공학적인 기술을 융합 하여 결손된 인체 조직의 형태학적 및 기능적인 재생을 유도하고자 하는 것이다1,2). 최근 조직공학의 연구와 줄기세포에 대한 연구들이 활발하게 진행되어 다양한 분야에서 조직재생 및 재건을 시도하고 있다. 혈관3), 요도4), 방광5) 등 인체내의 많은 조직들을 인공적으로 재현하고자 하고, 실제 임상에서도 조직공학적... -
The Current Status and Future Outlook of Quantum Dot-Based Biosensors for Plant Virus Detection
한국식물병리학회 The Plant Pathology Journal 8 Pages
한국식물병리학회 The Plant Pathology Journal 2018, 34권 2호 1 85-92 (8 pages)
Enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR), widely used for the detection of plant viruses, are not easily performed, resulting in a demand for an innovative and more efficient diagnostic method. This paper summarizes the characteristics and research trends of biosensors focusing on the physicochemical properties of both interface elements and bioconjugates. In particular, the topological and photophysical properties of quantum dots (QDs) are discussed, along... -
제철슬래그 선·분정광의 고부가화 연구
최준길, 반봉찬 한국열환경공학회 열환경공학 13 Pages
한국열환경공학회 열환경공학 2009, 제 6권 1호 6 57-69 (13 pages)
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The electrical and heating properties of copper-incorporated graphite fibers fabricated using different ultrasonication techniques
Kyeong Min Lee, Min-Ji Kim, Hanjoo Jo, Sang Young Yeo, Young-Seak Lee 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 15 111-114 (4 pages)
Electrical energy can be converted into heat energy through ohmic joule heating. Metallic materials are typically used in electrical heating elements because of their great electrical conductivity. However, metallic materials have several weaknesses, such as corrosion susceptibility, heavy weight, high manufacturing costs, and electromagnetic wave emissions [1,2]. To resolve these problems, carbon materials with good electrical conductivity, such as carbon fibers, graphite fibers, carbon... -
Applications of carbon-based materials in solid phase micro-extraction: a review
Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 2 10-17 (8 pages)
With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption... -
Electrochemical determination of chloramphenicol using a glassy carbon electrode modified with dendrite-like Fe₃O₄ nanoparticles
Krishnan Giribabu, Sung-Chan Jang, Yuvaraj Haldorai, Muruganantham Rethinasabapathy, Seo Yeong Oh, Arunkumar Rengaraj, Young-Kyu Han 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 6 38-47 (10 pages)
In this study, magnetite (Fe3O4) nanoparticles were electrochemically synthesized in an aqueous electrolyte at a given potential of -1.3 V for 180 s. Scanning electron microscopy revealed that dendrite-like Fe3O4 nanoparticles with a mean size of < 80 nm were electrodeposited on a glassy carbon electrode (GCE). The Fe3O4/GCE was utilized for sensing chloramphenicol (CAP) by cyclic voltammetry and square wave voltammetry. A reduction peak of CAP at the Fe3O4/GCE was observed at 0.62 V, whereas... -
Synthesis, characterization, and antibacterial performance of Ag-modified graphene oxide reinforced electrospun polyurethane nanofibers
Bishweshwar Pant, Mira Park, Rae-Sang Jang, Woo-Cheol Choi, Hak-Yong Kim, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 3 17-21 (5 pages)
Polyurethane (PU) nanofibers containing graphene oxide (GO) and Ag doped functionalized reduced graphene oxide (Ag-RGO) were successfully prepared via the electrospinning technique. The uniform distribution of GO sheets along with Ag nanoparticle in the nano?bers was investigated by scanning electron microscopy and the elemental mapping technique. X-ray diffraction and thermal gravimetric analysis veri?ed the presence of GO and Ag in the bicomposite nano?brous mats. Antibacterial tests against... -
Extraction and characterization of lignin from black liquor and preparation of biomass-based activated carbon therefrom
Daeyeon Kim, Jinsil Cheon, Jeonghoon Kim, Daekyun Hwang, Ikpyo Hong, Oh Hyeong Kwon, Won Ho Park, Donghwan Cho 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 14 81-88 (8 pages)
of attenuated total reflectance- Fourier transform infrared spectroscopy and 1H-nuclear magnetic resonance spectroscopy. The extracted lignin was carbonized at different temperatures and then activated with steam at 850oC. The extracted lignin in powder state was transformed into a bulky carbonized lignin due to possible fusion between the lignin particles occurring upon carbonization. The carbonized and then pulverized lignin exhibits brittle surfaces, the increased thermal stability, and the... -
Synthesis and characterization of carbon doped TiO₂ photocatalysts supported on stainless steel mesh by sol-gel method
JO. Tijani, OO. Fatoba, TC. Totito, WD. Roos, LF. Petrik 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 6 48-59 (12 pages)
morphological characteristics, particle sizes and surface area of the prepared catalyst was investigated. The prepared catalysts were characterized by several analytical methods: high resolution scanning electron microscopy (HRSEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS). The XRD patterns showed that the supported TiO₂ nanocrystals are typically anatase, polycrystalline and body-centered tetragonal... -
Study of complex electrodeposited thin film with multi-layer graphene-coated metal nanoparticles
Young-Lae Cho, Jung-woo Lee, Chan Park, Young-il Song, Su-Jeong Suh 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 8 68-73 (6 pages)
We have demonstrated the production of thin films containing multilayer graphene-coated copper nanoparticles (MGCNs) by a commercial electrodeposition method. The MGCNs were produced by electrical wire explosion, an easily applied technique for creating hybrid metal nanoparticles. The nanoparticles had average diameters of 10?120 nm and quasispherical morphologies. We made a complex-electrodeposited copper thin film (CETF) with a thickness of 4.8 μm by adding 300 ppm MGCNs to the electrolyte... -
Synthesize multi-walled carbon nanotubes via catalytic chemical vapour deposition method on Fe-Ni bimetallic catalyst supported on kaolin
Aliyu A, Abdulkareem AS, Kovo AS, Abubakre OK, Tijani JO, Kariim I 한국탄소학회 Carbon Letters 18 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 5 33-50 (18 pages)
combined effects of the reaction temperature and acetylene flow rate predominantly influenced the MWCNT yield. The N2 adsorption (BET) and TGA analyses reveal high surface areas and thermally stable MWCNTs. The HRTEM/HRSEM micrographs confirm the formation of tangled MWCNTs with a particle size of less than 62 nm. The XRD patterns of the MWCNTs reveal the formation of a typical graphitized carbon. This study establishes the production of MWCNTs from a bi-metallic catalyst supported on kaolin. -
Improving dispersion of multi-walled carbon nanotubes and graphene using a common non-covalent modifier
Youbin Kwon, Wonbo Shim, Seung-Yeol Jeon, Ji-Ho Youk, Woong-Ryeol Yu 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 8 53-61 (9 pages)
the polymer-wrapping process. Transmission electron microscopy analysis confirmed the wrapping of the MWCNTs and graphene with PAN layers. The interaction between the graphitic structure and the PAN molecules was examined using proton nuclear magnetic resonance, ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and Raman spectroscopy. The obtained results revealed that the cyano groups of the PAN molecules facilitated adhesion of the PAN... -
Adsorption capability of activated carbon synthesized from coconut shell
Md Shariful Islam, Bee Chin Ang, Samira Gharehkhani, Amalina Binti, Muhammad Afifi 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2016, Vol.20 1 1-9 (9 pages)
Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m2/g with a pore volume of 1.032 cm3/g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The... -
Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview
Donghwan Cho, Lawrence T. Drzal 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 1 1-11 (11 pages)
In efforts to characterize and understand the properties and processing of phenylethynyl-terminated imide (LaRC PETI-5, simply referred to as PETI-5) oligomers and polymers as a high-temperature sizing material for carbon fiber-reinforced polymer matrix composites, PETI-5 imidization and thermal curing behaviors have been extensively investigated based on the phenylethynyl end-group reaction. These studies are reviewed here. In addition, the use of PETI-5 to enhance interfacial adhesion between... -
Molecular approach to hexagonal and cubic diamond nanocrystals
Mudar Ahmed Abdulsattar 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 5 192-197 (6 pages)
calculated binding energy per atom shows that wurtzoids are tighter structures than diamondoids. Distribution of angles and bonds manifest the main differences between hexagonal and cubic diamond-type structures. Charge transfer, infrared, nuclear magnetic resonance and ultraviolet-visible spectra are investigated to identify the main spectroscopic differences between hexagonal and cubic structures at the molecular and nanoscale. Natural bond orbital population analysis shows that the bonding of... -
Thermal properties in strong hydrogen bonding systems composed of poly(vinyl alcohol), polyethyleneimine, and graphene oxide
Sua Choi, Duck Kun Hwang and Heon Sang Lee 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 8 282-289 (8 pages)
Blends of poly(vinyl alcohol) (PVA), polyethyleneimine (PEI), and graphene oxide (GO) were prepared by solution casting method. Calorimetric thermal properties of the blends were investigated. The Tgs of PVA/PEI blends were higher than the Tgs of either of the component polymers at low concentrations of PEI. These abnormal increases of Tgs may be due to the negative entropy of mixing which is associated with strong hydrogen bonding between PVA and PEI. The degree of depression of s was not...
