자료유형
전체 선택해제
총 13건 검색
본문검색 결과만 보기
-
The expression of plasmid mediated afimbrial adhesin genes in an avian septicemic Escherichia coli strain
Eliana Guedes Stehling, *, Tatiana Amabile Campos, Marcelo Brocchi, Vasco Ariston de Carvalho Azevedo, Wanderley Dias da Silveira 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 1호 10 75-83 (9 pages)
44, 444-452. 22. Maurer JJ, Brown TP, Steffens WL, Thayer SG. The occurrence of ambient temperature-regulated adhesins, curli, and the temperature-sensitive hemagglutinin Tsh among avian Escherichia coli. Avian Dis 1998, 42, 106-118. 23. Nataro JP, Kaper JB. Diarrheagenic Escherichia coli. Clin Microbiol Rev 1998, 11, 142-201. 24. Nicholls L, Grant TH, Robins-Browne RM. Identification of a... An Escherichia coli strain (SEPT13) isolated from the liver of a hen presenting clinical signs of septicaemia had a LD50 of 4.0 × 105 CFU/ml in one-day-old chickens, expressed Ia, Ib, E1, E3, K and B colicins and aerobactin. The strain was ampicillin and streptomycin resistant, and found to have fimA, csgA and tsh DNA related sequences; it could adhere to and invade HEp-2 and tracheal epithelial cells, expressed fimbriae (observed by electron microscopy), and had five plasmids of 2.7, 4.7,... -
Diagnosis and Integrated Management of Major Fungal Fruit Rots on Kiwifruit in Korea
한국식물병리학회 식물병연구 2018, 24권 2호 3 113-122 (10 pages)
type bags may reduce Botrytis build-up in the bag since the canvas picking bags can become contaminated with Botrytis spores attached to kiwifruit hairs (Michailides and Elmer, 2000). Holding or curing the fruit at ambient temperatures before packing and cold storage significantly decreases Botrytis stem-end rot because fruits rapidly cooled to 0 oC (forced air cooling) develop more Botrytis... -
Mechanical and electrical properties of epoxy resin/epoxidized castor oil/carbon fiber cloth composites
Fan-Long Jin, Heng Zhang, Shan-Shan Yao, Soo-Jin Park 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 12 105-109 (5 pages)
ambient temperature and light, and become active only under external stimulation such as heating or photoirradia- tion. Therefore, a thermally latent initiator can easily control the initiation and curing process of an epoxy system, which is desirable for the enhancement of both pot life and handling of epoxy resins [23-26]. In this study, we prepared CF-reinforced epoxy composites using DGEBA... Carbon fibers (CFs) have a unique combination of outstanding mechanical, physical, and chemical properties and are among the materials most frequently used in the preparation of a large variety of composites [1-5]. CF-reinforced polymer composites have been widely used in many advanced technological fields, such as aerospace, engineering, sporting goods, automobiles, and marine industry during the past few decades due to their excellent properties, including high strength-to-weight ratios, light... -
Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides
Mi-Seon Park, Sangmin Lee, Young-Seak Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.21 1 1-7 (7 pages)
onto the GO without ma- jor structural changes. 3.3. Mechanical properties of the aminated GO/epoxy composites Tensile tests of the GO- and aminated GO-based epoxy com- posites were performed at ambient temperature to investigate their tensile strengths and moduli. The test results revealed that the addition of GO and aminated GO resulted in somewhat dif- ferent stress-strain curves, as shown... strength values were 42.1 MPa and 12.3 J/m, respectively, which were observed in an epoxy composite prepared with GO treated with a 28% ammonia solution. This improved tensile strength was 2.2 and 1.3 times higher than those of the neat epoxy and the non-treated GO-based epoxy composite, respectively. The amine groups on the GO ensure its participation in the cross-linking reaction of the epoxy resin under amine curing agent condition and enhance its interfacial bonding with the epoxy resin. -
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)
of 5 mm/min, at ambient temperature (25ºC). At least fve samples were tested after conditioning at room temperature (25°C) for at least 2 d prior to testing. 2.6.2. Fracture toughness For the mode I interlaminar fracture toughness (GIC) tests, the [0]8 laminates were used and a non-adherent flm (Tefon flm), 7.5 m thick, was inserted in the mid-plane of one edge perpen- dicular to the fbers... 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... -
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)
results obtained for melt strength tests, which demonstrated that gamma radiation on 0, 10, 15, 20 and 30 kGy foam samples, under ambient condi- tions, induced long chain branching, once carbonyl groups could not be detected via infrared analyses. The modifed samples showed low values for gel fraction (≤2%), and rheological tests confrmed the existence of branching and cross-linking, from 5... 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... -
Synthesis and characterization of polybenzoxazole/graphene oxide composites via in situ polymerization
Jun Lim, Min-Cheol Kim, Munju Goh, Hyeounk Yeo, Dong Geun Shin, Bon-Cheol Ku, Nam-Ho You 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.4 9 251-254 (4 pages)
8.5 g of NaClO3 were mixed using a stir- rer at room temperature. Then, 9 mL of fuming nitric acid was slowly poured into the mixture using a dropping funnel in an ice bath and stirred for 24 h at ambient temperature. An additional 5 mL of fuming nitric acid was added into the mixture. Next, the mixture was heated at 60°C and stirred for 24 h. After that, the mixture was neutralized using 20... -
Improved Electrical Conductivity of a Carbon Nanotube Mat Composite Prepared by In-Situ Polymerization and Compression Molding with Compression Pressure
Ye Ji Noh, Han Sang Kim, Seong Yun Kim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2012, Vol.13 No.4 8 243-247 (5 pages)
257 (FPP-RS8, DASOL ENG, Korea) under ambient conditions. When applying a voltage drop of 500 V between the center and the sample boundary, the resistivity of sample was obtained by measuring the output current. Electrical resistivity is calculated by using the following equation [18]: of thermoplastic CNT mat composites was investigated by using in-situ polymerizable and low viscous cyclic... -
A review of the preparation and properties of carbon nanotubes-reinforced polymer compositess
Fan-LongJin, 박수진 한국탄소학회 Carbon Letters 13 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.2 1 57-69 (13 pages)
is added to a solvent and dissolved by mechanical stirring. The obtained gel-like solution is poured onto aluminum foil and placed in a vacuum oven. After drying, the material is left to cool to ambient and is then broken into small pieces. The fbers are spun using an Instron capillary rheometer. A typical procedure for preparation of the composites by melt-mixing method is as follows [62]:...