31 research outputs found
Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects
Full text linkWe theoretically investigate into the effects of the incidence angles in
light transmission of cholesteric liquid crystal two-layer sandwich structures
with twist defects created by rotation of the one layer about the helical
axis.The conoscopic images and polarization resolved patterns are obtained for
thick layers by computing the intensity and the polarization parameters as a
function of the incidence angles.In addition to the defect angle induced
rotation of the pictures as a whole, the rings of defect mode resonances are
found to shrink to the origin and disappear as the defect twist angle varies
from zero to its limiting value and beyond.Comment: revtex4, 7 pages, 4 figure
Um estudo da viabilidade de um programa de seguro agrícola baseado em um índice de produtividade regional em Castro (PR)
Full text linkUma digressão sobre o programa de subvenção ao prêmio do seguro rural e as implicações para o futuro deste mercado
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Magnesium-induced errors of translation in a cell-free system from krebs-II ascites carcinoma cells
No full textAnálise espacial da produtividade agrícola no Estado do Paraná: implicações para o seguro agrícola
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Modulation of defect modes intensity by controlled light scattering in photonic crystal with liquid crystal domain structure
No full textSELECTIVE CONVERSION OF NITROBENZENE TO PHENYLCARBAMATES CATALYZED BY PD(II) AND HETEROPOLYACIDS
No full textA homogeneous catalyst system of Pd(ll) and a heteropolyacid (HPA) converts nitrobenzene to N-phenylcarbamate with a selectivity of 96.3% at 100% nitrobenzene conversion, which appears to be the best value known in the literature. However, the catalyst forms solid deposits during the reaction. © 1990 Korean Institute of Chemical Engineering.close9
