Pattern formation and ommatidial differentiation were examined in the developing retina of the lobster Homarus americanus using light and electron microscopy. In the lobster the retina differentiates from the surface ectoderm that covers the optic primordia. Initially a single band of proliferation moves across this surface ectoderm. Immediately following this wave of proliferation, rows of omm...

E. Lefai · I. Ruiz de Mena · R. Garesse Departamento de Bioquímica, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Facultad de Medicina, Universidad Autónoma de Madrid, c/ Arzobispo Morcillo 4. 28029 Madrid. Spain M. Calleja Centro de Biologia Molecular "Severo Ochoa" CSIC-UAM, Campus de Cantoblanco, Madrid, Spain A. T. Lagina III · L. S. Kaguni Department of Biochemistry, Mic...

Three fluorescent asymmetric bis-urea receptors (L1-L3) have been synthesised. The binding properties of L1-L3 towards different anions (fluoride, acetate, hydrogencarbonate, dihydrogen phosphate, and hydrogen pyrophosphate HPpi3-) have been studied by means of 1H-NMR, UVVis and fluorescence spectroscopies, single crystal X-ray diffraction, and theoretical calculations. In particular, a remarka...

Humans sometimes forage or distribute the products of foraging in ways that do not maximize individual energetic return rates. As an alternative to hypotheses that rely on reciprocal altruism to counter the costs of inefficiency, we suggest that the cost itself could be recouped through signal benefit. Costly signaling theory predicts that signals can provide fitness benefits when costs are hon...

It is known that the medio-posterior cerebellar lobules VI/VII of the vermis and caudal part of the fastigial nucleus (cFN) are involved in the control of saccadic displacements of the visual axis in space (gaze). We have recently shown in the head-unrestrained cat that inactivation of the cFN severely impairs the accuracy of orienting gaze shifts toward visual targets by altering the amplitude...

The effects of inhibition of carotenoid biosynthesis by 2-hydroxybiphenyl on the photosynthetic growth, pigment composition and chlorosome structure of Chlorobium phaeobacteroides strain CL1401 were examined. At a concentration of 20 μg 2-hydroxybiphenyl ·ml -1 , carotenoid synthesis was largely inhibited (85%), but the photosynthetic growth rate was almost unaffected (μ control =0.00525±0.0000...

Purpose: To compare urgency symptoms in women with interstitial cystitis/bladder pain syndrome (IC/BPS) and overactive bladder (OAB). Materials and Methods: Women with diagnoses of IC/BPS (n=194) and OAB (n=85) were recruited from the clinical practices of Urologists (n=8) and Gynecologists (n=16) with recognized expertise in the diagnosis and management of these conditions. Subjects completed ...

This collection of articles presents a range of results achieved by the editors and their colleagues at the Indiana University Learnability Project, including former students in that programme. The work has cumulatively produced, and benefits from, a large database of phonological disorders in 279 children aged 3 to 7. In addition to Dinnsen andGierut, there are five other contributors; all but...