School Leader Update, June 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, July 2010

Monthly newsletter produced by Iowa Department of Education

Iowa Public Employees' Retirement System Member Handbook Supplement, July 2010

In 2010, the state legislature and the governor approved changes to the IPERS plan. Important changes will apply to most IPERS members, but the changes are not effective until July 1, 2012. A few changes were effective immediately but did not affect most IPERS members. Because most of the IPERS plan is unchanged, IPERS published the law changes as a supplement to the IPERS Member Handbook. The IPERS Member Handbook remains effective until July 1, 2012. View the supplement as an addendum to the IPERS Member Handbook dated May 2009.

School Leader Update, August 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, September 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, November 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, October 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, December 2010

Monthly newsletter produced by Iowa Department of Education

School Leader Update, February 2011

Monthly newsletter produced by Iowa Department of Education

School Leader Update, January 2011

Monthly newsletter produced by Iowa Department of Education

X-ray diffraction, thermal analysis, and Raman scattering study of K2BeF4 and comparation to other member of the (beta)-K2SO4 family with ferroelectric -paraelectric transition

Thermal analysis, powder diffraction, and Raman scattering as a function of the temperature were carried out on K2BeF4. Moreover, the crystal structure was determined at 293 K from powder diffraction. The compound shows a transition from Pna21 to Pnam space group at 921 K with a transition enthalpy of 5 kJ/mol. The transition is assumed to be first order because the compound shows metastability. Structurally and spectroscopically the transition is similar to those observed in (NH4)2SO4, which suggests that the low-temperature phase is ferroelectric. In order to confirm it, the spontaneous polarization has been computed using an ionic model.

Cutting edge: a novel viral TNF receptor superfamily member in virulent strains of human cytomegalovirus.

The UL144 open reading frame found in clinical isolates of human CMV (HCMV) encodes a structural homologue of the herpesvirus entry mediator, a member of the TNFR superfamily. UL144 is a type I transmembrane glycoprotein that is expressed early after infection of fibroblasts; however, it is retained intracellularly. A YXXZ motif in the highly conserved cytoplasmic tail contributes to UL144 subcellular distribution. The finding that no known ligand of the TNF family binds UL144 suggests that its mechanism of action is distinct from other known viral immune evasion genes. Specific Abs to UL144 can be detected in the serum of a subset of HCMV seropositive individuals infected with HIV. This work establishes a novel molecular link between the TNF superfamily and herpesvirus that may contribute to the ability of HCMV to escape immune clearance.

School Leader Update, April 2011

Monthly newsletter produced by Iowa Department of Education

School Leader Update, March 2011

Monthly newsletter produced by Iowa Department of Education