Composition of rocks and minerals from the transition zone of the Reykjanes Ridge

Investigations of petrography, mineralogy, and chemical composition of gases and fluids in tuffs and lavas were carried out on samples dredged in the transition zone from the shelf and slope of Iceland to the Reykjanes Ridge. The samples were collected from the depths of 950-720 m during different expeditions of R/V Akademik Kurchatov and Mikhail Lomonosov. Mantle ultrabasite inclusions were first recognized in the region of Iceland. It can be assumed that they are related to eruptive structures formed on the ocean floor during Pliocene and are associated with the Iceland hot spot.

[C II] and 12^CO(1-0) emission maps in HLSJ091828.6+514223: a strongly lensed interacting system AT z = 5.24

We present Submillimeter Array [C II] 158 μm and Karl G. Jansky Very Large Array 12^CO(1-0) line emission maps for the bright, lensed, submillimeter source at z = 5.2430 behind A 773: HLSJ091828.6+514223 (HLS0918). We combine these measurements with previously reported line profiles, including multiple 12^CO rotational transitions, [C I], water, and [N II], providing some of the best constraints on the properties of the interstellar medium in a galaxy at z > 5. HLS0918 has a total far-infrared (FIR) luminosity L_FIR(8–1000 μm) = (1.6 ± 0.1) × 10^14 L_☉ μ^–1, where the total magnification μ_total = 8.9 ± 1.9, via a new lens model from the [C II] and continuum maps. Despite a HyLIRG luminosity, the FIR continuum shape resembles that of a local LIRG. We simultaneously fit all of the observed spectral line profiles, finding four components that correspond cleanly to discrete spatial structures identified in the maps. The two most redshifted spectral components occupy the nucleus of a massive galaxy, with a source-plane separation <1 kpc. The reddest dominates the continuum map (demagnified L_FIR, component = (1.1 ± 0.2) × 10^13 L_☉) and excites strong water emission in both nuclear components via a powerful FIR radiation field from the intense star formation. A third star-forming component is most likely a region of a merging companion (ΔV ~ 500 km s^–1) exhibiting generally similar gas properties. The bluest component originates from a spatially distinct region and photodissociation region analysis suggests that it is lower density, cooler, and forming stars less vigorously than the other components. Strikingly, it has very strong [N II] emission, which may suggest an ionized, molecular outflow. This comprehensive view of gas properties and morphology in HLS0918 previews the science possible for a large sample of high-redshift galaxies once ALMA attains full sensitivity.

Intervención social en VIH-Sida.

Resumen basado en el del autor

La investigación a través del mundo del cómic : (experiencia didáctica).

Precede al tit.: Didáctica de la literatura

La marca notoria en la CAN

Frente a la limitada existencia de estudios que definan el alcance de la figura de la notoriedad de las marcas en la Comunidad Andina, el autor aporta un marco conceptual, normativo y jurisprudencia de esta figura, , relacionándola con distintos instrumentos internacionales. La necesidad de unificar criterios en ecuador respecto a la interpretación de la normativa vigente para marcas notorias ha sido una de las razones para profundizar el análisis de la notoriedad, pues solo así se contribuirá a incentivar un ambiente de seguridad jurídica en el que tanto los titulares de derechos subjetivos como la instancia administrativa y autoridad nacionales competentes se conduzcan con lineamientos definidos y con actuaciones legales eficientes para consolidar un sistema que tutele de manera eficaz este tipo de derechos. En el transcurso del libro, el lector es retado a analizar el grado de cumplimiento de la legislación respecto de las obligaciones internacionales adquiridas, la conveniencia en el incremento de los niveles de protección y los problemas de aplicación de la normativa vigente.

Study of tyrosine kinases and protein tyrosine phosphorylation

In recent years, our increased understanding of the complex signal transduction mechanisms that regulate cellular function has fueled huge advances in all aspects of biomedical science and cell biology. Platelet and megakaryocyte function is no exception to this. In the last 10 yr our understanding of the receptor biochemistry and the systems that they control has been pivotal in the development of new strategies to inhibit platelet function and thereby prevent thrombosis. Experimental techniques have become more and more elegant, however; the basic toolbox that a researcher requires to study signaling in platelets and megakaryoctes is described in this and several subsequent chapters.

Efeito da sazonalidade no teor proteico e composição de aminoácidos no pólen apícola produzido em Botucatu, Estado de São Paulo

Pós-graduação em Zootecnia - FMVZ

Relationships between running economy and mechanics in middle-distance runners

Running economy (RE), i.e. the oxygen consumption at a given submaximal speed, is an important determinant of endurance running performance. So far, investigators have widely attempted to individuate the factors affecting RE in competitive athletes, focusing mainly on the relationships between RE and running biomechanics. However, the current results are inconsistent and a clear mechanical profile of an economic runner has not been yet established. The present work aimed to better understand how the running technique influences RE in sub-elite middle-distance runners by investigating the biomechanical parameters acting on RE and the underlying mechanisms. Special emphasis was given to accounting for intra-individual variability in RE at different speeds and to assessing track running rather than treadmill running. In Study One, a factor analysis was used to reduce the 30 considered mechanical parameters to few global descriptors of the running mechanics. Then, a biomechanical comparison between economic and non economic runners and a multiple regression analysis (with RE as criterion variable and mechanical indices as independent variables) were performed. It was found that a better RE was associated to higher knee and ankle flexion in the support phase, and that the combination of seven individuated mechanical measures explains ∼72% of the variability in RE. In Study Two, a mathematical model predicting RE a priori from the rate of force production, originally developed and used in the field of comparative biology, was adapted and tested in competitive athletes. The model showed a very good fit (R2=0.86). In conclusion, the results of this dissertation suggest that the very complex interrelationships among the mechanical parameters affecting RE may be successfully dealt with through multivariate statistical analyses and the application of theoretical mathematical models. Thanks to these results, coaches are provided with useful tools to assess the biomechanical profile of their athletes. Thus, individual weaknesses in the running technique may be identified and removed, with the ultimate goal to improve RE.