First verbal productions of a bilingual child learning Basque and Spanish simultaneously : analysis of the noun phrase. 'Primeras producciones verbales de niños bilingües aprendiendo castellano y euskera simultáneamente : análisis de los sustantivos en la frase'.

Estudiar la evolución del lenguaje en niños bilingües que hablan euskera y castellano. Hipótesis: se encontrarán pocas marcas gramaticales en las frases. En euskera aparecerán ciertos sufijos de declinación; se espera encontrar el determinante 'A', marca de los casos locativo y posesivo y posiblemente algunos dativos. En castellano se espera no encontrar marcas gramaticales con preposiciones y artículos y sí en los casos locativo y posesivo. No se hallarán marcas formales y sí algunas construcciones lingüísticas por categorías ya que parece que los sistemas gramaticales funcionan de manera autónoma. Un niño en su período entre un año y once meses hasta dos años y tres meses, que se desenvuelve en euskera en el ambiente familiar y en castellano en su ambiente social. Se trata de un estudio descriptivo que está dividido en cuatro apartados: relato del ambiente familiar y social en el que se desenvuelve el niño. Diferencias entre el castellano y el euskera. Teorías que explican este tipo de problemas. Análisis de datos recogidos en las cintas. Las marcas gramaticales en castellano y euskera se clasifican en dos grupos: prefijos y unidades aisladas que preceden al nombre como artículos, pseudoartículos. Sufijos, incluyendo las marcas de casos, y calificativos. Grabaciones en vídeo sobre la producción en castellano y en euskera en situaciones familiares espontáneas. Cada sesión de grabación dura 30 minutos para cada idioma. Análisis de los datos recogidos en la grabación después de haber realizado la transcripción. En este caso, el artículo castellano no aparece inmediatamente. Los artículos indefinidos son más frecuentes que los definidos. Las formas masculinas predominan sobre las femeninas. Los artículos en castellano y los nombres en castellano y euskera son las unidades gramaticales más numerosas. Hay pocos ejemplos de sufijos locativos y posesivos. Aparecen pocas marcas de plural en los nombres. Se usan otras cuantificaciones como números, palabras 'otro', 'más'. A este nivel gramatical no hay fusión de marcas de los dos idiomas: no hay terminaciones 'A' en palabras castellanas usadas en contexto hispano y no hay artículos castellanos delante de nombres vascos usados en contexto vasco.

Difference limens for first formant frequencies of synthesized vowels in hearing-impaired listeners

This paper studies auditory-vowel perception abilities of the hearing impaired. The study investigated the relationship among the difference limen for first formant frequencies of synthesized vowels in severe and profoundly hearing-impaired listeners, degree of hearing low, and general auditory speech perception.

First CRDS-measurements of water vapour continuum in the 940nm absorption band

Measurements of near-infrared water vapour continuum using continuous wave cavity ring down spectroscopy (cw- CRDS) have been performed at around 10611.6 and 10685:2 cm1. The continuum absorption coefficients for N2- broadening have been determined for two temperatures and wavenumbers. These results represent the first near-IR continuum laboratory data determined within the complex spectral environment in the 940nm water vapour band and are in reasonable agreement with simulations using the semiempirical CKD formulation.

Archaeological evidence for the first Mesolithic occupation of the Western Isles of Scotland

The examination of eroding coastal dunes at the prehistoric site of Northton, Harris, has produced the first archaeological evidence of Mesolithic activity in the Western Isles in the form of two midden-related deposits. The first phase of Mesolithic activity is dated to 7060-6650 cal. Bc based on AMS dating of charred hazelnut shells. This discovery appears to validate the frequent pollen-based inferences of Mesolithic impact for the area and, as predicted, allows the Atlantic fringe of Scotland to become part of the European Mesolithic mainstream. A detailed pedological analysis also suggests that these early midden layers may have been amended during the Neolithic period as part of a possible phase of cultivation.

Effect of acute administration of recombinant human leptin during the neonatal period on body temperature and endocrine profile of the piglet

Background: Leptin is produced predominantly by white adipocytes; in adults it regulates appetite and energy expenditure but its role in the neonate remains to be fully established. Objectives: To examine the effects of acute administration of recombinant human leptin on the endocrine profile and thermoregulation of neonatal pigs. Methods: 24 pairs of siblings (n = 48) were administered with either a single dose (4 mu g ml(-1) kg(-1) body weight) of leptin (L: n = 24) or a placebo (P: n = 24) on day 6 of neonatal life. Rectal temperature was recorded, and tissue samples were taken at 1 (n = 12), 2 (n = 12), 4 (n = 12) or 6 (n = 12) hours post-administration. Plasma concentrations of hormones and metabolites were determined in conjunction with messenger RNA (mRNA) for leptin and uncoupling protein-2. Results: Plasma leptin increased following leptin administration, and differences in concentrations of insulin, thyroxine and non-esterified fatty acids were observed between the two groups. Initially, rectal temperature decreased in L pigs but returned to start values by 1.5 h. This decline in rectal temperature was delayed in placebo animals, resulting in differences between treatments at 1.5 and 2 h. Conclusions: Acute leptin administration alters the endocrine profile of pigs and influences the thermoregulatory ability of the neonate. Copyright (C) 2007 S. Karger AG, Basel.

First structural analysis of a naphthalene-based poly(ether ketone): Crystal and molecular simulation from X-ray powder data and diffraction modeling

Polycondensation of 2,6-dihydroxynaphthalene with 4,4'-bis(4"-fluorobenzoyl)biphenyl affords a novel, semicrystalline poly(ether ketone) with a melting point of 406 degreesC and glass transition temperature (onset) of 168 degreesC. Molecular modeling and diffraction-simulation studies of this polymer, coupled with data from the single-crystal structure of an oligomer model, have enabled the crystal and molecular structure of the polymer to be determined from X-ray powder data. This structure-the first for any naphthalene-containing poly(ether ketone)-is fully ordered, in monoclinic space group P2(1)/b, with two chains per unit cell. Rietveld refinement against the experimental powder data gave a final agreement factor (R-wp) of 6.7%.

First crystallographic signature of an acyclic peptide nanorod: molecular mechanism of nanorod formation by a self-assembled tetrapeptide

A terminally protected acyclic tetrapeptide Boc-Aib-Val-Aib-beta-Ala-OMe 1 (Aib: alpha-aminoisobutyric acid, beta-Ala: beta-Alanine) self-assembles into a continuous hydrogen-bonded supramolecular helix with an average diameter of 10Angstrom (1nm) starting from a double bend molecular conformation in crystals and further self-assembly of this supramolecular architecture leads to the formation of polydisperse nanorods of diameters 10-40 nm.