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Optical properties of conjugated polymers having linear carbon moieties
M.Kijima,I.Kinoshita,K.Hiroki,H.Shirakawa,K.Yoshikawa,Y.Mishima,N.Sasaki 한국물리학회 2002 Current Applied Physics Vol.2 No.4
Alternate conjugated copolymers consisting of phenylene or biphenylylene unit and linear carbons unit such as cumulene andpolyyne were synthesized. The optical property of these polymers was investigated by UVVis and uorescence spectroscopies.Among cumulene-type polymers, the polymer having allene moiety showed a unique hypsochromic shift and intense blue uo-rescence in solution, while poly(phenylenebutadiynylene)s, typical of polyyne-type linear conjugated polymers, showed uorescencepolymers on optical property as well as the band structure were evaluated on the basis of Hammet parameters, which was utilizedfor designing of the polymers. The poly(arylenebutadiynylenes)s were applied in polymer LED. The devices consisting of ITO/PEDOT-PSS/emitting polymer/Ca/Al realized EL emissions in the region covering RGB colors.. 2002 Elsevier Science B.V. All rights reserved.
Wild host plants of four spider mite species (Acari: Tetranychidae) infesting fruit crops in Okinawa
S. Ohno,A. Miyagi,T. Gotoh,T. Ganaha-Kikumura,K. Shiromoto,K. Kijima,T. Ooishi 한국응용곤충학회 2011 Journal of Asia-Pacific Entomology Vol.14 No.3
To determine the wild host plants of four major spider mite species infesting fruit crops grown in the subtropical Asian region, we collected and identified mites from non-crop plants throughout the islands of Okinawa, southwestern Japan. Although the two mango pests, Oligonychus coffeae and O. biharensis, are polyphagous, they did not share any wild host species in the field, indicating that their source plants are completely separate in Okinawa. Several major wild hosts were determined for Eutetranychus africanus, a pest of papaya and citrus. Its host range partially overlapped with that of O. biharensis. The citrus red mite,Panonychus citri, was very rare on non-crop plants in Okinawa, suggesting that it maintains its population mainly on the citrus trees in the area. These results are of great significance when considering vegetation control as part of the integrated management of these pest mites. During our survey, two non-pest species,Panonychus caglei (new to Japan) and Oligonychus gotohi (new to Okinawa), were also found.