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전체 선택해제
총 66건 검색
본문검색 결과만 보기
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Who goes to University? : Expansion of higher education and class differentials in educational aspiration in South Korea
HYEYUN JEONG 한국교육사회학회 한국교육사회학회 학술대회자료집 39 Pages
한국교육사회학회 한국교육사회학회 학술대회자료집 2019 춘계학술대회 4 72-110 (39 pages)
of their socioeconomic background when holding the academic achievement constant. Using Korean Educational Longitudinal Survey (KELS 2005), this research demonstrates that educational expansion does not necessarily correspond to greater equality of educational opportunity regardless of social origin in South Korea. This empirical examination indicates that educational mechanism still reproduces the class differentials in educational attainment through both primary and secondary effects. Students... -
Comparison of the effects of isoflurane versus propofolremifentanil anesthesia on oxygen delivery during thoracoscopic lung lobectomy with one-lung ventilation in dogs
Jiyoung Park, Hae-Beom Lee, Seong Mok Jeong 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2018, 제 19권 제 3호 12 426-433 (8 pages)
This study compared effects of isoflurane inhalation (ISO) and propofol-remifentanil combined total intravenous anesthesia (TIVA) on oxygenation during thoracoscopic lung lobectomy with 30-min one-lung ventilation (1LV). Thoracoscopic right middle lung lobectomy was performed in ten dogs divided into ISO and TIVA groups, and cardiopulmonary parameters were measured with blood gas analysis. Throughout the study, isoflurane was inhaled up to 1.5%, and the infusion rates of propofol and... -
Modeling of Arrhythmogenic Automaticity Induced by Stretch in Rat Atrial Myocytes
JaeBoumYoum, ChaeHunLeem, YinHuaZhang, NariKim, JinHan, YungE.Earm 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2008, Vol.12 No.5 8 267-274 (8 pages)
Since first discovered in chick skeletal muscles, stretch-activated channels (SACs) have been proposed as a probable mechano-transducer of the mechanical stimulus at the cellular level. Channel properties have been studied in both the single-channel and the whole-cell level. There is growing evidence to indicate that major stretch-induced changes in electrical activity are mediated by activation of these channels. We aimed to investigate the mechanism of stretch-induced automaticity by... -
Postnatal Changes in Atrial Compliance and Stretch-Induced ANP Secretion in Rabbits
SuhnHeeKim, KyungSunLee, SungZooKim, KyungHwanSeul, KyungWooCho 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.5 8 393-401 (9 pages)
To define the postnatal changes in ANP secretion in response to mechanical stretch and atrial compliance, experiments have been done in perfused nonbeating rabbit atria with different ages: 1-day, 1-, 2-, 3-, 4-, and 8-wk-old. In 1-day-old-rabbits, an increase in intraatrial pressure resulted in an increase in atrial volume, which was higher than that in 1-wk-old rabbits. Increases in atrial volume stimulated the secretion of ANP with concomitant translocation of extracellular fluid (ECF) into... -
신성 고혈압쥐의 전신성 동맥계와 폐동맥계에 대한 EDRF 기능의 차이
이병호(Byung-Ho Lee), 신화섭(Hwa-Sup Shin), 허인회(In-Hoe Huh) 대한약리학회 대한약리학잡지 12 Pages
대한약리학회 대한약리학잡지 1993, 제 29권 제 2호 7 213-224 (12 pages)
급성 신성 고혈압쥐 (2-kidney, 1-ligation type)의 전신성 동맥계와 폐 동맥계에 대한 내피 의존적 혈관반응성을 규명하기 위하여, 적출 혈관 및 마취상태의 흰쥐에 대한 acetylcholine (ACh)의 혈관이완작용 및 혈압강하 작용을 측정하였다. 혈장 renin 활성(PRA)은 신동맥 결찰전 7.31 ± 0.63 ng/ml/hr A I에 비해 결찰 6 ~ 8일후에는 19 ~ 22 ng/ml/hr A I으로 유의성있게 증가하였으며, 이는 수축기혈압의 상승과 (154 ± 1.83{\rightarrow}190 ~ 215 mmHg) 일정한 상관성을 유지하였다. 신성 고혈압쥐 및 정상 혈압쥐의 흉곽... -
Effects of High Glucose on Na,K-ATPase and Na/glucose Cotransporter Activity in Primary Rabbit Kidney Proximal Tubule Cells
Han, Ho-Jae 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1995, 제 29권 제 1호 7 69-80 (12 pages)
in 5 mM glucose medium. Rb+ uptake rate in 5 mM glucose medium was reduced by 28% when the cultures were incubated with 1 mM ouabain. The increase of the Rb+ uptake by rabbit kidney proximal tubule cells in 20 mM glucose could be attributed primarily to an increase in the rate of ouabain-sensitive Rb+ uptake (5 mM to 20 mM; 4.68±0.85 to 8.38±1.37 nM/mg protein/min). In conclusion, the activity of the renal proximal tubular Na,K-ATPase is elevated in high glucose concentration. In contrast, the... -
Role of Endogenous Nitric Oxide in the Control of Renin Release
Lee, Je-Jung, Kim, Dong-Ho, Kim, Young-Jae, Kim, Won-Jae, Yoo, Kwang-Jay, Choi, Ki-Chul, Lee, Jong-Eun, 대한생리학회 대한생리학회지 8 Pages
대한생리학회 대한생리학회지 1994, 제 28권 제 2호 13 225-232 (8 pages)
The present study was undertaken to investigate the role of endogenous nitric oxide in renin release under different physiological conditions. In the first series of experiments, renin release was either inhibited by acute volume-expansion (VE) or stimulated by clipping one renal artery in the rat. VE was induced by intravenous infusion of saline (0.9% NaCl) up to 5% of the body weight over 45 min under thiopental (50 mg/kg, IP) anesthesia. VE caused a decrease of plasma renin concentration... -
Contribution of Bulk Flow to Transport Mechanisms of the Membranes Surrounding Amniotic Fluid in the Rabbit
Lim, Young-Cheol, Lee, Sang-Jin, Sung, Ho-Kyung 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1994, 제 28권 제 1호 8 79-90 (12 pages)
were much higher in hypotonic amniotic fluid than in isotonic. 3. In hypervolumetric and increased Censored group, the rate of Na+ efflux increased proportionately with the increment of Censored concentration up to 0.98, which was higher than the rate of Li+ efflux in isotonic amniotic fluid. However, the increment of Na+ concentration was rather related with the initial Na+ concentration in hypotonic amniotic fluid, showing inverse relationship. Li+ concentration increased only when there was a... -
Myogenic Autoregulation of Coronary Vessels and Heterometric Autoregulation of the Myocardium
Doring, H.J., Schlicht, I., Hiller, V., Jiang, X.R. 대한생리학회 대한생리학회지 12 Pages
대한생리학회 대한생리학회지 1989, 제 23권 제 2호 1 225-236 (12 pages)
1) At the isolated perfused guinea-pig and rat heart heterometric autoregulation of the myocardium and myogenic autoregulation of the coronary vessels were induced by means of stepwise increases of perfusion pressure. 2) According to this loading test Frank-Starling function curves of the left ventricle and pressure-flow curves of the coronary vessels can be drawn. This graphic evaluation gives more information about the condition of the heart and the coronary vessels than simple evaluation... -
조미료가 창자 운동과 흡수기능에 미치는 영향 -소장의 피동적 흡수에 대한 고추의 영향-
신동훈(Shin, Dong-Hoon), 김중수(Kim, Joong-Soo), 고재평(Koh, Jae-Pyong), 안승운(Ahn, Seung-Woon) 대한생리학회 대한생리학회지 10 Pages
대한생리학회 대한생리학회지 1973, 제 7권 제 1호 3 23-32 (10 pages)
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Spatial and Temporal Genetic Diversity and Population Structure of Hemileia vastatrix from Peruvian Coffee Plantations
Cinthia Quispe-Apaza, Roberto Mansilla-Samaniego 한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2021, 37권 3호 7 280-290 (11 pages)
Population genetic studies of Hemileia vastatrix have been conducted in order to describe the evolutionary dynamics of the pathogen and the disease epidemiology as consequence of changes in disease management and host distribution occurred in Peru after the 2013 epi- demic. These analyses were performed by sequencing the internal transcribed spacers of the nuclear ribosom- al DNA (rDNA-ITS) of H. vastatrix collected from two coffee growing areas in 2014 and 2018. H. vastatrix pop- ulation showed... -
Evolutionary Rates and Phylogeographical Analysis of Odontoglossum Ringspot Virus Based on the 166 Coat Protein Gene Sequences
Zhen He, Tingting Dong, Weiwen Wu, Wen Chen, Xian Liu, Liangjun Li 한국식물병리학회 The Plant Pathology Journal 10 Pages
한국식물병리학회 The Plant Pathology Journal 2019, 35권 5호 10 498-507 (10 pages)
infer the genetic diversities, evolutionary rate, timescale and migration of ORSV populations. Evolutionary rate of ORSV populations was 1.25 × 10−3 nucleotides/site/y. The most recent common ancestors came from 30 year ago (95% confidence intervals, 26- 40). Based on CP gene, ORSV migrated from mainland China and South Korea to Taiwan island, Germany, Australia, Singapore, and Indonesia, and it also circulated within east Asia. Our study is the first attempt to evaluate the evolutionary... -
Management of Citrus Canker in Argentina, a Success Story
한국식물병리학회 The Plant Pathology Journal 9 Pages
한국식물병리학회 The Plant Pathology Journal 2017, 33권 5호 1 441-449 (9 pages)
Citrus canker is an important bacterial disease of citrus in several regions of the world. Strains of Xanthomonas citri type-A (Xc-A) group are the primary pathogen where citrus canker occurs. After Xc-A entered the Northeast of Argentina in 1974, the disease spread rapidly from 1977 to 1980 and then slowed down and remained moving at slow pace until 1990 when it became endemic. Citrus canker was detected in Northwest Argentina in 2002. This paper presents the main steps in the fight of the... -
Altering Conidial Dispersal of Alternaria solani by Modifying Microclimate in Tomato Crop Canopy
한국식물병리학회 The Plant Pathology Journal 11 Pages
한국식물병리학회 The Plant Pathology Journal 2016, 32권 6호 3 508-518 (11 pages)
Early blight of tomato caused by Alternaria solani, is responsible for severe yield losses in tomato. The conidia survive on soil surface and old dry lower leaves of the plant and spread when suitable climatic conditions are available. Macroclimatic study reveals that highest inoculum concentration of Alternaria spores appeared in May 2012 to 2013 and lowest concentration during January 2012 to 2013. High night temperature positively correlated and significantly (P ; 0.01) involved in conidial... -
Research Articles : Responses of Guava Plants to Inoculation with Arbuscular Mycorrhizal Fungi in Soil Infested with Meloidogyne enterolobii
한국식물병리학회 The Plant Pathology Journal 7 Pages
한국식물병리학회 The Plant Pathology Journal 2013, 29권 3호 3 242-248 (7 pages)
Brazil, expansion of guava crops has been impaired by Meloidogyne enterolobii that causes root galls, leaf fall and plant death. Considering the fact that arbuscular mycorrhizal Fungi (AMF) improve plant growth giving protection against damages by plant pathogens, this work was carried out to select AMF efficient to increase production of guava seedlings and their tolerance to M. enterolobii. Seedlings of guava were inoculated with 200 spores of Gigaspora albida, Glomus etunicatum or Acaulospora... -
와이블 확장분포에 의존한 소프트웨어 신뢰성모형에 관한 신뢰도 성능분석 연구
김정범, 김희철, 전종오, 이동현, 변제섭, 조준호, 유경화, 이진환 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 11 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2018, 제 8권 제 1호 80 813-823 (11 pages)
무한고장 비동질적인 포아송 과정 모형에서 위험함수는 고장시간에 독립인 상수패턴을 따르거나, 비 증가 또는 비 감소하는 패턴을 따를 수 있다. 본 연구에서는 소프트웨어의 오류를 확인하여 조치 하는 시행에서 무한고장수를 가진 비동질적인 포아송 과정에 기초하였다. 수명분포는 다양한 확률현 상을 표현 할 수 있는 연장 와이블 분포와 확장 와이블 분포를 이용하였다. 따라서 변형된 와이블분 포를 이용한 소프트웨어 신뢰성모형에 대한 효율성을 비교하는데 중심을 두었다. 본 논문의 신뢰도 효율성 결과 분석에서는 소프트웨어... -
Services in International Trade of China: Factors Influence on the Share
Kyung Mi Bae, Youn Sung Kim 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 8 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2017, 제 7권 제 11호 6 63-70 (8 pages)
This paper examines factors influence on the share of services in international trade of China. In 2004, China overtook Japan as the leading Asian exporter, outdistanced the United States in 2007 and Germany in 2009 as the world’s leading exporter. Since the performance of services in China has shown the competitiveness in international trade for the last decade, it is determined to be the noteworthy field of the economy. In this study, the periodical changes of services in international trade... -
AUSTRALIAN VETERANS' AFFAIRS PAPER FOR THE INTERNATIONAL SEMINAR
Barry Telford 한국보훈학회 한국보훈학회 학술대회지 27 Pages
한국보훈학회 한국보훈학회 학술대회지 2005 국제세미나 8 280-306 (27 pages)
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대입시기 대학 및 전공지향 선택이 노동시장 진입에 미치는 영향
이왕원, 최지은, 최율 한국교육사회학회 한국교육사회학회 학술대회자료집 43 Pages
한국교육사회학회 한국교육사회학회 학술대회자료집 2016 춘계학술대회 9 132-174 (43 pages)
본 연구에서는 대입시기 개인들의 대학 및 전공 선택이 이후 그들의 노동시장 진입에 미치는 영향을 확인한다. 대학 및 전공 지향 선택은 다음의 네 가지 유형으로 구분된다. 첫째, 학벌주의에 기초한 대학 지향 선택, 둘째, 취업에 유리한 학과를 우선적으로 선택하는 전공지향 선택, 셋째, 취업에는 불리하지 만 자신의 관심과 흥미에 기초한 전공지향 선택, 넷째, 대학과 전공의 특성을 동시한 고려한 선택이다. 한국사회의 학벌주의와 학과 선호의 편향성을 반영하는 이 네 가지 유형은 노동시장 진입에서의 유리 한 위치를 점하기... -
MARKETS, STANDARDS, AND INEQUALITY
Michael W. Apple 한국교육사회학회 한국교육사회학회 학술대회자료집 52 Pages
한국교육사회학회 한국교육사회학회 학술대회자료집 2001 국제학술대회 1 1-52 (52 pages)
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English Education in the Primary School : A Comparative Study
한국교육사회학회 교육사회학연구 2000, 제 10권 제 1호 6 125-144 (20 pages)
이 연구는 지난 약 100년 동안 초등학교 영어교과의 제도화 및 확산 과정을 살펴보기 위한 것이다. 세계 각국에서 수집된 광범위한 자료들을 역사적으로 비교 분석한 결과, 영어를 초등 학교의 정규 교육과정에 포함시키는 나라의 수는 지속적으로 늘어났으며, 특히 2차 세계대전 이후에 그와 같은 현상이 더욱 두드러지게 나타났음을 알 수 있었다. 세계 각국으로부터 수집 된 초등 교육과정의 분석 결과는 개별 국가의 고유한 특성들이 영어교과의 제도화에 그다지 큰 작용을 하지 않음을 보여주고 있다. 이와 같은 연구 결과는 많은... -
On Beyong Status Quo: Emerging e-Learning Paradigm in Education
Insook Lee 한국교육학회 한국교육학회 학술대회논문집 26 Pages
한국교육학회 한국교육학회 학술대회논문집 KSSE Inter 19 439-464 (26 pages)
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정보통신망과 유아, 아동사망률
오경래, 김인덕, 한지희 한국헬스커뮤니케이션학회 헬스커뮤니케이션연구 41 Pages
한국헬스커뮤니케이션학회 헬스커뮤니케이션연구 2011, Vol.5 No.1 5 139-179 (41 pages)
구조화 이론에 따르면 구조와 행위자는 상호의존적 관계 안에 존재하며, 이 구조들은 인간의 행동을 제약하기도 하고 촉진하기도 한다. 구조화 이론을 건강 불평등 문제에 접목시켰을 때, 우리는 커뮤니케이션 인프라가 국가적 보건 측면에서 제약적인, 그리고 촉진적인 역할을 수행할 것임을 추정해 볼 수 있다. 본 연구는 국가의 정보통신망이 유아, 아동 사망률에 미치는 장기적 영향을 측정하기 위해 인구 천 명당 전화회선의 평균 숫자를 변수로 사용했다. 세계개발 지수를 이용해 202개 국가를 대상으로 종단적 회귀분석을 적용해... -
Comparative Legal Review on Foreign Bank Regulations in Korea and Indonesia
Byung Tae Kim 은행법학회 은행법연구 24 Pages
은행법학회 은행법연구 2014, 제 7권 제 2호 6 113-136 (24 pages)
Korea and Indonesia have come up with specific blueprints for restructuring their respective banking and financial sectors post the Asian financial crisis. Even though there have been many changes recently in the regulations of both countries' banking sector, foreign banks have tended to operate in certain non-traditional types of markets (e.g., foreign exchange, derivatives and international banking activities generally) which may require greater or different regulation. In addition, the... -
The Construction of Young Children During COVID-19 in the Online Media in Indonesia
Ina Winangsih, Vina Adriany, Euis Kurniati 환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 16 Pages
환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 2023, Vol.17 No.1 11 217-232 (16 pages)
Media is believed to possess its power in constructing discursive meaning in the society. This article aims to see how media creates discourse pertaining children and childhood during the pandemic of COVID-19. This article adopts critical discourse analysis (CDA) in order to unpack power relation in the children discourse by analyzing 78 articles from websites found in the internet. The analysis suggests that there is one hegemonic and dominant discourse on children, namely discourse of... -
A Study on the Current Status of Childcare Teacher Policy and Policy Evaluation in Korea
Gilsook Kim 환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 16 Pages
환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 2022, Vol.16 No.2 11 231-246 (16 pages)
This study attempted to suggest the future direction of policy for childcare teachers in Korea by examining and evaluating the legal status of childcare teachers, the flow of childcare policies, and policies related to improving the treatment of childcare teachers by period. For this, the related laws, press releases, and basic mid-to-long-term childcare plans were analyzed by examining the respective home pages (websites) of the 「Child Care Act」 and the 「Early Childhood Education Act」, as... -
여성 골퍼의 참여동기와 참여특성에 따른 참여만족도 관계 : 여성골퍼의 참여동기에 따른 참여 만족도 효과
이상일, 유현순, 김선주 한국웰니스학회 한국웰니스학회지 16 Pages
한국웰니스학회 한국웰니스학회지 2011, 제 6권 2호 5 53-68 (16 pages)
본 연구의 목적은 여성골퍼의 참여동기와 참여만족도의 관계를 분석함으로 참여만족에 미치는 참여동기 요인들을 찾아 만족도를 높일 수 있는 방안을 모색한 것이다. 연구목적 달성을 위해 서울과 수도권 소재 골프연습장에서 골프연습에 참여하고 있던 여성골퍼들에게 설문조사를 실시 연구결과는 다음과 같다. 첫째, 성취감, 즐거움, 사교의 참여동기는 심리만족도에 영향을 미쳤다. 둘째, 즐거움과 성취에 대한 참여동기는 시설만족도에 영향을 미쳤다. 셋째, 성취감, 즐거움, 사교, 외적과시는 신체적 만족도에 영향을 미쳤다. 넷째,... -
시간-주파수 변환 압축에 따른 정상 성인의 한국어 단음절 숫자 인지 기능
임덕환, 원유경 한국청각언어재활학회 Audiology and Speech Research 6 Pages
한국청각언어재활학회 Audiology and Speech Research 2012, 제 8권 제 2호 7 190-195 (6 pages)
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강원도민의 건강, 스포츠, 여가시간에 대한 인식
설수영, 프란시스 로보 한국여가문화학회 여가학연구 27 Pages
한국여가문화학회 여가학연구 2010, Vol.7 No.3 3 45-71 (27 pages)
본 연구는 강원도민의 건강, 스포츠, 여가시간에 대한 인식을 분석하고 있다. 잘 알려진 바와 같이 강원도의 도청소재지인 춘천은 2010년 제11회 세계 레저 총회(World Leisure Congress)를 개최하고 있어, 본 논문은 관련 분야의 가장 중요한 세계적 이벤트를 주최하는 지역의 주민이 여가 전반에 관해 지닌 인식과 행위에 대한 정보를 제공한다는 의미가 있다. 분석 결과에 따르면 강원도민은 활기차고 건강하며 스포츠 지향적인 공동체에서 삶을 영위하고 있는 것으로 나타난다. 건설적인 활동에 그들의 여가시간을 의미있게 활용하고... -
High-energy-density activated carbon electrode for organic electric-double-layer-capacitor using carbonized petroleum pitch
Poo Reum Choi, Sang-Gil Kim, Ji Chul Jung, Myung-Soo Kim 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 8 70-80 (11 pages)
Activated carbons (ACs) have been used as electrode materials of electric double-layer capacitors (EDLC) due to their high specific surface areas (SSA), stability, and ecological advantages. In order to make high-energy-density ACs for EDLC, petroleum pitch (PP) precarbonized at 500?1000°C in N2 gas for 1 h was used as the electrode material of the EDLC after KOH activation. As the pre-carbonization temperature increased, the SSA, pore volume and gravimetric capacitance tended to decrease, but... -
Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix
H.J. Carrillo-Escalante, A. ?lvarez-Castillo, A. Valadez-Gonz?lez, P. J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 6 47-56 (10 pages)
In this study, the fracture behavior of a thermoplastic-modified epoxy resin reinforced with continuous carbon fibers for two levels of fiber-matrix adhesion was performed. A carbon fiber with commercial sizing was used and also treated with a known silane, (3-glycidoxy propyl trimethoxysilane) coupling agent. Toughness was determined using the double cantilever test, together with surface analysis after failure using scanning electron microscope. The presence of polysulfone particles improved... -
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)
carbon fibers and a bismaleimide (BMI) matrix, as well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated... -
Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review
Pradeep Puligundla, Sang-Eun Oh, Chulkyoon Mok 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 1 1-10 (10 pages)
have been widely used for different types of lignocellulosic biomass conversion. Additional advantages of microwave-based pretreatments include faster treatment time, selective processing, instantaneous control, and acceleration of the reaction rate. The present review provides insights into the current research and advantages of using microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to fermentable sugars in the process of cellulosic ethanol production. -
Effects of cross-linking methods for polyethylene-based carbon fibers: review
Kwan-Woo Kim, Hye-Min Lee, Jeong-Hun An, Byoung-Suhk Kim, Byung-Gak Min, Shin-Jae Kang, Kay-Hyeok An, Byung-Joo Kim 한국탄소학회 Carbon Letters 24 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 2 147-170 (24 pages)
In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist... -
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.... -
Carbon nanotubes synthesis using diffusion and premixed flame methods: a review
Garima Mittal, Vivek Dhand, Kyong Yop Rhee, Hyeon-Ju Kim and Dong Ho Jung 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.1 1 1-10 (10 pages)
In recent years, flame synthesis has absorbed a great deal of attention as a combustion method for the production of metal oxide nanoparticles, carbon nanotubes, and other related carbon nanostructures, over the existing conventional methods. Flame synthesis is an energyefficient, scalable, cost-effective, rapid and continuous process, where flame provides the necessary chemical species for the nucleation of carbon structures (feed stock or precursor) and the energy for the production of carbon... -
Pitch based carbon fibers for automotive body and electrodes
Kap Seung Yang, Bo-Hye Kim, Seong-Ho Yoon 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 2 162-170 (9 pages)
Pitch is an attractive raw material for carbon fiber precursors due to its low cost stemming from its availability as a residue of coking and petroleum processes. Ford Motor Company reported a carbon fiber target price of $11.0/kg by using a fast cycle-time manufacturing method with carbon fiber in an inexpensive format, allowing for an average retail price of gasoline of $3.58/gallon. They also recommended the use of carbon fiber with strength of 1700 MPa, modulus of 170 GPa, and 1.5%... -
Superhydrophobic carbon-based materials: a review of synthesis, structure, and applications
Long-Yue Meng, Soo-Jin Park 한국탄소학회 Carbon Letters 16 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.2 5 89-104 (16 pages)
Materials with appropriate surface roughness and low surface energy can form superhydrophobic surfaces, displaying water contact angles greater than 150°. Superhydrophobic carbon-based materials are particularly interesting due to their exceptional physicochemical properties. This review discusses the various techniques used to produce superhydrophobic carbon-based materials such as carbon fibers, carbon nanotubes, graphene, amorphous carbons, etc. Recent advances in emerging fields such as... -
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)
shows a lack of densification. The compacts with low matrix precursor to reinforcement weight ratios have insufficient bonding agent to bind the reinforcement whereas the higher matrix precursor to reinforcement weight ratio results in a plaster-like structure. Based on the microstructure analysis, a heating rate of 0.2°C/min, pressure of 15 MPa, and a matrix precursor to reinforcement ratio of 50:50 are found to be optimum w.r.t attaining bloating-free densification and processing time. -
Hierarchical porous carbon nanofibers via electrospinning
Aikifa Raza, Jiaqi Wang, Shan Yang, Yang Si, Bin Ding 한국탄소학회 Carbon Letters 14 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.1 1 1-14 (14 pages)
Carbon nanofibers (CNFs) with diameters in the submicron and nanometer range exhibit high specific surface area, hierarchically porous structure, flexibility, and super strength which allow them to be used in the electrode materials of energy storage devices, and as hybrid-type filler in carbon fiber reinforced plastics and bone tissue scaffold. Unlike catalytic synthesis and other methods, electrospinning of various polymeric precursors followed by stabilization and carbonization has become a...
