The present study suggests that in addition to HHV-6 reactivation, reactivation of HHV-7, CMV and/or EBV may also occur following drug eruption in some patients with DIHS.

In addition to the previously described epoxy fatty acids, five hydroxy fatty acids were characterized as self defensive substances produced in the rice plant against rice blast disease.

Dedicated in honor to Prof. Richard R. Schrock on the occasion of his 60th birthday.Abstract: The effect of the cyclopentadienyl fragment in the copolymerization of ethylene with norbornene (NBE) by various non-bridged (aryloxo)(cyclopentadienyl)titanium(IV) complexes of the type, Cp'TiCl 2 -(OAr) [Cp' ¼ indenyl (1), C 5 Me 5 (Cp*, 2), t-BuC 5 H 4 (3), 1,2,4-Me 3 C 5 H 2 (4); OAr ¼ O-2,6-i-Pr 2 C 6 H 3 ], À MAO catalyst systems has been explored. The catalytic activity and the NBE incorporation were highly dependent upon substituent on Cp' employed, and 1 exhibited both a remarkable catalytic activity and an efficient NBE incorporation, affording high molecular weight polymers with unimodal molecular weight distributions. NBE repeat units were observed in the resultant poly(ethylene-co-NBE)s prepared by 1, 3, and 4, and the degree of NBE dyads as well as alternating sequences was strongly influenced by the Cp' employed. These complexes (1,3,4) also exhibited high catalytic activities for ethylene/cyclopentene (CPE) copolymerization, but the CPE incorporation by 1 was less efficient than the NBE incorporation under the same conditions. The ab initio density functional (DF) molecular orbital (MO) methods were utilized to explore the effect of substituents on Cp' toward the catalytic activity, the NBE incorporation and the monomer sequence distribution. Good correlations between the DE coord Et (coordination energy of ethylene) after NBE insertion and the activity, and between DE coord NBE (coordination energy of NBE) after ethylene (or NBE insertion) and NBE content were observed, strongly suggesting that the capability producing NBE repeat units was dependent upon DE coord NBE after NBE insertion.

No abstract

No abstract

No abstract

No abstract

The optical properties of GeTe and Ge2Sb2Te5 have been studied by means of the density functional theory (DFT) in the local density approximation (LDA). The electronic band structures were obtained by two methods, the plane wave (PW) and spherical wave (SW) expansions of the wave functions. GeTe was calculated to be semiconductive, and Ge2Sb2Te5 to be semimetallic. The frequency dependent optical constants such as refractive index and extinction coefficient were calculated and compared with those obtained experimentally. The origin of the peaks in the extinction coefficient spectra was assigned in terms of the transitions between Ge, Sb and Te p states. Dynamical calculations with respect to Ge2Sb2Te5 have also been performed in order to obtain an understanding of its structural features. The displacements of the Te atoms were found to be larger than those of the Ge and Sb atoms.