Hayward, Linda F. Evidence for a-2 adrenoreceptor modulation of arterial chemoreflexes in the caudal solitary nucleus of the rat. Am J Physiol Regulatory Integrative Comp Physiol 281: R1464–R1473, 2001.—The caudal region of the nucleus of the solitary tract (cNTS) is the primary central termination site for arterial chemoreceptor afferents originating from the carotid body. The purpose of the p...

Neutron time-of-flight powder-diffraction spectra have been obtained in potassium cyanide (KCN) at temperatures between 25 and 200 K and at pressures between 35 and 366 MPa. These data sample Ave difFerent phases of KCN. In phase C, which exists at 366 MPa and below 170 K, the structure is determined to be paraelectric with the monoclinic space-group symmetry C2/c. This is in disagreement with ...

PURPOSE To report visual outcomes and corneal biomechanical changes after femtosecond-assisted Intacs SK implantation in keratoconic eyes. METHODS This prospective interventional case series is comprised of 32 keratoconic eyes of 25 patients with mean age of 23.8 ± 5.4 years. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity, refraction, manifest refraction spherical equivalent (...

Ventilation with enhanced fractions of O(2) (hyperoxia) is a common and necessary treatment for hypoxemia in patients with lung failure, but prolonged exposure to hyperoxia causes lung injury. Ischemia-reperfusion (IR) injury of lung tissue is common in lung transplant or crush injury to the chest. These conditions are associated with apoptosis and decreased survival of lung tissue. The objecti...

Objective. Since oligodendrocyte progenitor cells (OPCs) are the target cells of neonatal hypoxic-ischemic encephalopathy (HIE), the present study was aimed at investigating the protective effects of N-acetyl-l-cysteine (NAC), a well-known antioxidant and precursor of glutathione, in OPCs as well as in neonatal rats. Methods. In in vitro study, protective effects of NAC on KCN cytotoxicity in F...

Pollen tubes grow by spatially and temporally regulated expansion of new material secreted into the cell wall at the tip of the tube. A complex web of interactions among cellular components, ions and small molecule provides dynamic control of localized expansion and secretion. Cross-correlation studies on oscillating lily (Lilium formosanum Wallace) pollen tubes showed that an increase in intra...

Photosynthetic O(2)-production and photorespiratory O(2)-uptake were measured, using stable isotope techniques, in isolated intact leaf cells of the C(3) plant Xanthium strumarium L., and isolated intact chloroplasts of Spinacia oleracea L (var. Yates 102). Considerable light dependent O(2)-uptake was observed in both systems, a proportion of which could be suppressed by CO(2) (63% suppression ...