Let P6 denote the induced path on six nodes. We prove that if a perfect graph G contains P6 as an induced subgraph but not two families introduced by Conforti and Cornuéjols then G is bipartite or disconnected, or % G has a star cutset. r 2002 Elsevier Science (USA). All rights reserved.

OBJECTIVE In this retrospective study, we evaluated the efficacy of the reverse less invasive plating system (LISS) in the management of subtrochanteric fractures (STF) in elderly patients that are expected to be difficult to nail. SUBJECTS AND METHODS Fifty-five patients with STF were treated from April 2005 to December 2007. Of these, 26 (16 females and 10 males, age >65 years, average 79.8...

Six quaternary phosphonium salts (QPSs) in combination with phosphotungstic heteropolyacid, H3PW12O40, were tested the epoxidation of rapeseed oil fatty acid methyl esters a hydrogen peroxide aqueous solution. The QPSs consisted trihexyl(tetradecyl)phosphonium [P6], tributyl-tetradecylphosphonium [P4] or tetraoctylphosphonium [P8] cation and different anions—chloride (Cl−), bromide (Br−), tetra...

Tetraloops with the generic sequence GNRA are commonly found in RNA secondary structure, and interactions of such tetraloops with "receptors" elsewhere in RNA play important roles in RNA structure and folding. However, the contributions of tetraloop-receptor interactions specifically to the kinetics of RNA tertiary folding, rather than the thermodynamics of maintaining tertiary structure once f...

PCR was used to detect Haemophilus influenzae in samples of nasopharyngeal secretion and middle ear effusion (MEE). Nasopharyngeal secretions were collected from 102 patients with otitis media with effusion and from 111 healthy subjects. Eighty samples of MEE were collected from patients with otitis media with effusion. A pair of primers was designed to amplify a DNA segment of the gene encodin...

We studied the assembly of photosystem II (PSII) in several mutants from Chlamydomonas reinhardtii which were unable to synthesize either one PSII core subunit (P6 [43 kD], D1, or D2) or one oxygen-evolving enhancer (OEE1 or OEE2) subunit. Synthesis of the PSII subunits was analyzed on electrophoretograms of cells pulse labeled with [14C]acetate. Their accumulation in thylakoid membranes was st...

PURPOSE To examine the molecular profile of fetal human retinal progenitor cells (hRPCs) expanded in vitro and those grown in a co-culture system with mouse retina through the analysis of protein and gene expression and neurotransmitter-stimulated calcium dynamics. METHODS hRPCS were isolated from human retina of 14 to 18 weeks gestational age (GA) and expanded in vitro. Immunoblot, microarra...

PURPOSE To review the outcome of less invasive stabilisation system (LISS) plating for complex distal femoral fractures. METHODS Records of 6 men and 11 women who underwent LISS plating for complex distal femoral fractures from September 2001 to August 2005 were reviewed. One patient who died 12 months after surgery due to a cardiac problem was excluded. The mean age of the remaining patients...