These mice represent a model of human sleep homeostasis that provides an opportunity to probe the effect of sleep on human physical and mental health.”
“5-S-Lipoylhydroxytyrosol Ro-3306 (1), the parent member of a novel group of bioinspired multidefense antioxidants, is shown herein to exhibit potent peroxyl radical
scavenging properties that are controlled in a solvent dependent manner by the sulfur center adjacent to the active o-diphenol moiety. With respect to the parent hydroxytyrosol (HTy), 1 proved to be a more potent inhibitor of model autoxidation processes in a polar solvent (acetonitrile), due to a lower susceptibility to the adverse effects of hydrogen bonding with the solvent. Determination of O-H bond dissociation enthalpies (BDE) in t-butanol by EPR radical equilibration technique consistently indicated a ca. 1.5 kcal/mol lower value for 1 relative to HTy. In good agreement, DFT calculations of the BDEOH using an explicit methanol molecule to mimic solvent
effects predicted a 1.2 kcal/mol lower value for 1 relative to HTy. Forcing the geometry of the S-R group to coplanarity with the aromatic ring resulted in a dramatic decrease in the computed BDEOH values suggesting a potentially higher activity than the reference antioxidant a-tocopherol, depending on geometrical constrains in microheterogeneous environments. These results point to sulfur substitution as an expedient tool to tailor P005091 the chain breaking antioxidant properties of catechol derivatives in a rational and predictable fashion.”
“The temporal lobe is of importance for visuospatial orientation. Ulixertinib Intracranial
arachnoid cysts have a predilection for the temporal fossa, and might therefore affect visuospatial orientation. The aim was to find out whether temporal cysts affect maze learning and if surgical cyst decompression improves maze performance.\n\nForty-five patients with a temporal arachnoid cyst and 17 control patients with cervical disc disease were tested in a labyrinth route in the hospital corridors the day before surgery and at least 3 months postoperatively.\n\nThirty-five cyst patients (78 %) experienced postoperative improvement of their preoperative complaints. The cyst patients spent significantly longer time than the controls navigating through the maze in the preoperative test, 161 s and 127 s, respectively, but there was no difference in number of errors between the two groups. However, the cyst patients improved significantly in the postoperative test, both with regards to number of errors they made and time spent, contrary to the control patients, whose postoperative performance equalled that of the preoperative test. For the cyst patients, postoperative improvement in the labyrinth test correlated with the clinical outcome-but not the neuroradiological outcome-after the operation.\n\nThus, temporal arachnoid cysts may affect visuospatial orientation and learning in a reversible manner.