http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
The report presents turbulent Navier Stokes computations on twin engine afterbody model with jet exhaust. The computations are carried out for free-stream Mach number of 0.8 to 1.20 and jet pressure ratio of 3.4 to 7.8. The Spalart-Allmaras turbulence model is used in the computations. Comparison is made with experimental data and Cp distribution around the afterbody is found to agree well with experiments. Flow features of the exhaust jet like under expansion, over expansion, Mach discs, etc are well captured. The effect of nozzle pressure ratio and flight Mach number are studied in detail. These computations serve as validation of the in-house code for twin jet afterbody.
−Lignocellulosic biomass, Water hyacinth (Eichornia crassipes) was pretreated with ionic-liquid (IL)-water mixture using ILs, 1-butyl-3-methylimidazolium acetate [BMIM]OAc, 1-butyl-3-methylimidazolium chloride [BMIM]Cl, 1-butyl-3-methylimidazolium bromide [BMIM]Br and 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM]TFB. Effects of IL anions, IL content, temperature, time and particle size of biomass on dissolution and recovery of lignin were examined and the conditions were optimized. Biomass dissolution and yield of lignin recovery in ILwater mixtures with different anions of 1-butyl-3-methyl imidazolium based ILs follows the order, [BMIM]OAc>[BMIM]Cl>[BMIM]Br>[BMIM]TFB. The role of IL-water mixture for dissolution and recovery of lignin was investigated by characterizations using XRD, SEM, FTIR, TGA and XRF spectroscopy. The Hildebrand solubility parameters of biomass component (lignin) and IL-water mixtures were examined using intrinsic viscosity method. On applying the concept of Hildebrand solubility parameter for dissolution of the biomass in all the IL-water mixtures the results were consistent with the experimental results, which suggests that Hildebrand solubility parameter concept can be applied as primary information in choosing the appropriate solvent for biomass dissolution
The magnetic control on scattering of light by ultra¯ne iron oxide (?-Fe2O3) nanoparticles suspended in a carrier liquid was investigated. The light scattering behavior was studied using laser light under the in°uence of a permanent magnet over a rotating frame of reference. When the magnet is rotated continuously from 0? to 360? with respect to the direction of the incident laser beam, the scattered light pattern from the sample has the same angular displacement but in counter direction to the magnetic ¯eld rotation. When external ¯eld is not applied to the ferro°uid, no other preferred directional scattering of light is observed. The applied magnetic ¯eld induces directional self assembly of magnetic nanoparticles through dipole?dipole interactions. This ¯nally leads to the formation of \nanoparticle grating" and the optical geometry of diffraction grating clearly describes the anomalous scattering behavior of the ferro°uid. Most interestingly, for each complete orientation of the ¯eld from 0? to 360?, the transmitted light intensity switches between maxima and minima for longitudinal and transverse applied magnetic ¯elds.
In present days bio-fibers have attracted many researchers in the field of polymer composites due to theiroutstanding properties that nature has conferred on them. In this study, epoxidized soybean oil (ESO) was reacted withmethacrylic acid and then by methacrylic anhydride, along with suitable catalyst to form methacrylic anhydride basedepoxidized soybean oil (MAESO) resin. Chicken feather fibers were used as reinforcing agents in polymer composites due totheir high specific strength and modulus. The ratio of fiber/resin was taken as 30:70. The synthesis of resin was confirmed byfourier transfer infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopy. The interaction between the resin andchicken feather was studied by fourier transform infrared (FTIR) spectroscopy and SEM studies. The thermal stability andmechanical properties of the composites with/without styrene were evaluated using thermogravimetric analyser (TGA) anduniversal testing machine (UTM). Flame retardancy, water vapour uptake, and chemical resistance properties of thecomposites with/without styrene, were also studied.
Bhushan, Shashi,Gogoi, Mandakini,Bora, Abhispa,Ghosh, Sourav,Barman, Sinchini,Biswas, Tethi,Sudarshan, Mathummal,Thakur, Ashoke Ranjan,Mukherjee, Indranil,Dey, Subrata Kumar,Chaudhuri, Shaon Ray The Korean Society for Microbiology and Biotechnol 2019 한국미생물·생명공학회지 Vol.47 No.2
Earlier studies by our group revealed that gallic acid in phytochemicals stimulated biofilm production in epiphytes, while caffeic acid in phytochemicals inhibited biofilm production in non-epiphytes. It is well documented that antimicrobial secretion by some epiphytic bacteria inhibits non-epiphytic bacterial growth on leaf surfaces. These selection criteria help plants choose their microbial inhabitants. Calcium and iron in phytochemicals also stimulate biofilm formation and thus, may be selection criteria adopted by plants with respect to their native epiphytic population. Furthermore, the processing of leaves during phytochemical extraction impacts the composition of the extract, and therefore its ability to affect bacterial biofilm formation. Computation of the Hurst exponent using biofilm thickness data obtained from the Ellipsometry of Brewster Angle Microscopic (BAM) images is an efficient tool for understanding the impact of phytochemicals on epiphytic and non-epiphytic populations when compared to fluorescent microscopy, scanning electron microscopy, and staining techniques. To the best of our knowledge, this is the first report that uses the Hurst exponent to elucidate the mechanism involved in plant microbe interaction.