The notion that synaptic remodeling underlies certain forms of learning is one of the main tenets of Hebb's inspiring theories dating from the 1940s. Until recently, however, direct evidence for tight relationships between synaptic remodeling and behavior has been scarce. Fascinating data from recent studies on the remodeling of postsynaptic structures known as dendritic spines indicates that s...

A supramolecular self-assembly has been constructed by perylene-bridged bis(β-cyclodextrin)s with water-soluble porphyrin through hydrophobic interactions, showing strong excitonic coupling interactions between perylene backbones and included porphyrins.

AIM To investigate the feasibility of placing a screw in the C2 lamina and evaluate the reliability of the surface of the dorsal arch of C2 as a landmark for determining the optimal site of screw entry. MATERIAL AND METHODS 88 adult human C2 spines were used. Seven measurements were determined for screw entry points, trajectories, and lengths for placement of intralaminar screws. RESULTS Th...

In this issue of Hospital Pediatrics, Dr David Rappaport and colleagues report on the outcomes and costs associated with implementation of a surgical hospitalist comanagement service for medically complex children undergoing spine fusion surgery at Nemours/Alfred I. duPont Hospital for Children (duPont) that was started in September 2005.1 This report is of great personal interest because it is...

It is very difficult to discuss the treatment of tuberculous disease of the spine, as the treatment is so lengthy and the results so distant and so easily modified by the future home and social conditions of the patient. It is easy to produce destructive criticism of the accepted methods of treatment, but very hard to suggest any treatment which is an improvement on the standard methods.

Glochinomyia nigriseta sp. nov. is described and illustrated. The generic characters of Glochinomyia are summarized and the new species is compared with the description of the only known species, G albiseta Kertész. The taxonomic position of Glochinomyia is briefly discussed and the Papuan species of the Pachygastrinae with four scutellar spines are keyed.

The evolution of many kinetic processes in 1+1 (space-time) dimensions results in 2D directed percolative landscapes. The active phases of these models possess numerous hidden geometric orders characterized by various types of large-scale and/or coarse-grained percolative backbones that we define. For the patterns originated in the classical directed percolation (DP) and contact process we show...

Two acceptor-acceptor (A-A) type copolymers (PIIG-BT and PIIG-TPD) with backbones composed exclusively of electron-deficient units are designed and synthesized. Both copolymers show unipolar n-type operations. In particular, PIIG-BT shows electron mobility of up to 0.22 cm(2) V(-1) s(-1). This is a record value for n-type copolymers based on lactam cores.

A series of oligo(quinoxalineethylene)s which exhibit n-type semi-conducting features were synthesized, and adding Ag(+) to their solutions induced the backbones to adopt coplanar conformations due to Ag(+)-N coordination.