Svejgaard A, Ryder LP (1¢)76): Interaction of HLA nmle-cules with non-immunological ligargls as an exp~ of HLA and disease. Lancet ii:547-549. To the Editor: In their recent overview, "'Benzodiazepines and Ca:atonia," Menza and Harris (1989) describe numerous theories regarding the response of catatonic symptoms to benzodi~zepines. Among these, they state that, "[Llow doses of GABA agonists red...

Albert J. Varon, MD* BACKGROUND: Ryder Trauma Center is a Level 1 trauma center with approximately 3800 emergency admissions per year. In this study, we sought to determine the incidence of failed prehospital intubations (PHI), its correlation with hospital mortality, and possible risk factors associated with PHI. METHODS: A prospective observational study was conducted evaluating trauma patien...

Quantitative measurements of the total blood flow to the brain of man have not previously been reported and the few procedures which have been used for the purpose of obtaining relative or qualitative values have recently been subjected to considerable criticism (1). The method to be described is based on the principle that the rate at which the cerebral venous blood content of an inert gas app...

To better understand tacit knowledge underlying experienced Web-Based Instruction designers’ performance, this study utilized Heuristic Task Analysis, a method developed for eliciting, analyzing, and representing expertise in complex cognitive tasks. Three experts, representing three post-secondary institutions offering online programs, were selected for interviews based on the following criter...

Dear Editor, Gastric antral vascular ectasia (GAVE) is an uncommon but important cause of chronic gastrointestinal blood loss and iron deficiency anaemia. The syndrome was first described in 1953 by Ryder et al in the gastrectomy specimen of an elderly woman. It was not until 1984 when Jabbari et al described the unique endoscopic appearance as “prominent erythematous stripes radiating in a spo...

Thyroid cancer is an important malignancy with relatively high incidence among women in middle east (Larijani et al., 2005; Larijani et al., 2004; Mohagheghi et al., 2009) and many part of the world (Salim et al., 2010) like Iran (Sanii et al., 2012; Haghpanah et al., 2006). The incidence has been increasing with rate of up to 3% in countries that reliable cancer registry exits (Morris et al., ...

4 Asymmetric age variations in spiral galaxies (Sonia Cianci) 6 Measuring stellar abundance gradients in galaxy disks using TTF (Stuart Ryder et al.) 8 Extraplanar emission-line gas in edge-on spiral galaxies (Sylvain Veilleux & Scott Miller) 10 Taurus spectroscopy of young brown dwarfs in Orion (Fiona Riddick et al.) 12 RAVE hits the Galaxy (Fred Watson et al.) 16 Lasers in space (Andrew McGra...

INTRODUCTION The description of tumors in invertebrates is rare. Smith in 1934 (4) described a mesenchymal tumor in the oyster (Ostrea virginica.) This tumor had arisen from the pericardium, was nodular or polypoid and consisted of large oval mesenchymal cells with an outer layer of simple columnar ciliated epithelium. A similar tumor was found in an oyster in 1887 by Ryder (2), and another tum...

The paper presents some considerations concerning the role of consciousness as a privileged state in nature which has implications for ethics. Especially in the modern talk about consciousness of human beings or animals since Thomas Nagel (1974) or Peter Singer (1975) we find discussions about the role of consciousness as an important irreducible and ‘higher’ phenomenon connected with a first p...

The evolution of the crust and the timing of early impact events is important in the scientific exploration of the Moon [1]. The recent National Research Council decadal study [2] made sampling the deposits of the South Pole-Aitken basin a major priority for planetary exploration. This basin, located on the southern far side, is the largest and oldest multi-ring basin on the Moon and may have e...