Neural crest cells (NCCs) can adopt different neuronal fates. In NCCs, neurogenin-2 promotes sensory specification but does not specify different subclasses of sensory neurons. Understanding the gene cascades that direct Trk gene activation may reveal mechanisms generating sensory diversity, because different Trks are expressed in different sensory neuron subpopulations. Here we show in chick a...

Since low birth weight is a leading cause of infant mortality,7 varying rates of this outcome among Hispanic subgroups may translate to similarly varying patterns in infant mortality. On the other hand, if access to neonatal intensive care services differs by maternal birthplace or ethnicity, then infant mortality rates might not reflect differences in low-birth-weight rates among Hispanic subg...

Volume 29, Number 4, July/August 1997 language would, in practice, have serious unintended consequences, such as nullifying laws allowing minors to obtain confidential reproductive health care and other sensitive health services, disrupting school sex education and AIDS prevention activities, and impeding the removal of children from abusive homes. However, the outcome also appears to reflect a...

We give a “limit-free formula” simplifying the computation of the topological entropy for topological automorphisms of totally disconnected locally compact groups. This result allows us to extend to our setting several basic properties of the topological entropy known for compact groups.

1. FECHET, J. E.-" Those airplane crashes; how they can be prevented." Flight Surgeon Topics, School of Aviation Medicine, Randolph Field, Texas, Vol. I, pp. 44-48, 1937. 2. FERREE, C. E. and RAND, G.-" The inertia of the eye for clear seeing .-t different distances." A study of ocular functions with special reference to aviation. Amer. JI. Ohthal., Vol. I, pp. 764-776, 1918. 3. FERREE, C. E. a...

Because of improvements in the fi eld of radiology as well as increased awareness, cystic neoplasms are increasingly Differentiating Pancreatic Ductal Adenocarcinoma from Pancreatic Serous Cystadenoma, Mucinous Cystadenoma, and a Pseudocyst with Detailed Analysis of Cystic Features on CT Scans: a Preliminary Study Peijie Lv, MM, Radfan Mahyoub, MD, Xiaozhu Lin, MD, Kemin Chen, MD, Weimin Chai, ...

The aim of this study was to assess neopterin, a marker of interferon gamma (IFN-gamma) induced macrophage activity, as a possible surrogate marker of inflammation in patients with multiple sclerosis. Urinary neopterin to creatinine ratios (UNCRs) were measured daily in 10 primary progressive (PP). 10 relapsing remitting (RR) and 11 secondary progressive (SP) patients with multiple sclerosis, a...