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Ishida, Yuko,Cornel, Anthony J.,Leal, Walter S. Korean Society of Applied Entomology 2003 Journal of Asia-Pacific Entomology Vol.6 No.1
We have identified and cloned an odorant-binding protein from the female mosquito, Culex tarsalis (CtarOBP). As expected for an olfactory protein, CtarOBP was detected by gel electrophoresis analysis in antennae but not in control tissues (legs). The isolated protein was identified by in-gel digestion and subsequent analysis of internal fragments by tandem mass spectrometry (MS-MS). Based on the amino acid sequences of two peptides generated by enzymatic digestion, degenerate primers were designed for cDNA cloning. The complete cDNA (cloned by RACE) encoded a protein with a signal peptide (24 residues) and a mature protein of 125 amino acid residues. The calculated molecular mass and isoelectric point of the mature protein were 14,515 Da and pI 5.5, respectively. CtarOBP showed the hallmark of odorant-binding proteins, 6 cysteine residues, and high sequence homology (61-96%) to previously characterized mosquito OBPs.
Antiferromagnetic Phase Transition of K-Rb Alloy Nanoclusters Incorporated in Sodalite
Takehito Nakano,Yuko Ishida,Atsufumi Hanazawa,Yasuo Nozue 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We prepared Rb-rich K-Rb alloy nanoclusters arrayed in the regular nanospace of aluminosilicatesodalite which has a bcc arrangement of cages. The average chemical formula of the cluster is(K1.5Rb2.5)3+, where one unpaired s-electron is shared by four alkali cations and is confined in acage. The magnetic susceptibility and the electron spin resonance clearly show an antiferromagneticphase transition at a N´eel temperature TN of approximately 90 - 100 K. The observed TNis higher than that in K3+4 (TN = 72 K) and (K3Rb)3+ clusters (TN = 80 K) in sodalites. Thisresult indicates a systematic enhancement of the antiferromagnetic exchange coupling between theadjacent nanoclusters by substituting Rb atoms for K ones. The size and the spatial distributionof the s-electron wave function in the nanocluster play a key role in the exchange coupling.
Satoshi Yamada,Yuko Shimada,Takanori Ishida,Yuka Matsumoto,Jun Iyama,Hiroumi Shimokawa,Hiroshi Ito,Satoshi Aoyagi 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.5
Submerged arc welding, which is generally used for the corner joint of box-section columns, is a welding process with a high heat input. The influence on the strength and toughness of the heat-affected zone is an important concern, especially when used with a high-performance steel that may be more susceptible to heat input. The ductility of the welded corner joint is one of the important factors to ensure safety against external forces, such as during severe earthquakes. In this study, a series of material and cyclic loading tests of the corner joint comprising SA440C high-performance steel fabricated by submerged arc welding were conducted. The experimental results indicated that the welded corner joint comprising SA440C steel is ductile enough to dissipate input energy caused by the strong ground motion from an earthquake.