We present new results from the VLBA 2 cm Survey, an imaging survey of active galactic nuclei (AGN) at submilliarcsecond resolution. We extend the structural variability monitoring program of more than 130 extragalactic parsec-scale radio jets from over 170 AGN to a total of eight years. The sample is explored further in time for all sources, and intensively for individual objects. We report ne...

It is well known that functions in the analytic Besov space B1 on the unit disk D admits an integral representation f(z) = ∫ D z − w 1− zw dμ(w), where μ is a complex Borel measure with |μ|(D) < ∞. We generalize this result to all Besov spaces Bp with 0 < p ≤ 1 and all Lipschitz spaces Λt with t > 1. We also obtain a version for Bergman and Fock spaces.

I Zw 18 is the most metal poor star-forming galaxy known and is an ideal laboratory to probe stellar evolution theory at low metallicities. Using archival HST WFPC2 imaging and FOS spectroscopy we were able to improve previous studies. We constructed a continuum free HeII λ4686 map, which was used to identify Wolf-Rayet (WR) stars recently found by ground-based spectroscopy and to locate diffus...

III Zw 2 is a spiral galaxy with an optical spectrum and faint extended radio structure typical of a Seyfert galaxy, but also with an extremely variable, blazar-like radio core. We have now discovered a new radio flare where the source has brightened more than twenty-fold within less than two years. A broad-band radio spectrum between 1.4 and 666 GHz shows a textbook-like synchrotron spectrum p...

Sexual differentiation in birds is controlled genetically as in mammals, although the sex chromosomes are different. Males have a ZZ sex chromosome constitution, while females are ZW. Gene(s) on the sex chromosomes must initiate gonadal sex differentiation during embryonic life, inducing paired testes in ZZ individuals and unilateral ovaries in ZW individuals. The traditional view of avian sexu...

The interactions of transition metals with the prion protein (PrP) are well-documented and characterized, however, there is no consensus on their role in either the physiology of PrP or PrP-related neurodegenerative disorders. PrP has been reported to protect cells from the toxic stimuli of metals. By employing a cell viability assay, we examined the effects of various concentrations of Cu2+, Z...

We present the second XMM-Newton observation (85ks) of the narrow-line Seyfert 1 galaxy (NLS1) I Zw 1 and describe its mean spectral and timing characteristics. On average, I Zw 1 is ∼ 35 per cent dimmer in 2005 than in the shorter (20 ks) 2002 observation. Between the two epochs the intrinsic absorption column density diminished, but there were also subtle changes in the continuum shape. Consi...

Systems neuroscience addresses the complex circuits made by populations of neurons in the CNS and the cooperative function of these neurons. Improved approaches to the neuroanatomical analysis of CNS circuits are thus of great interest. In fact, significant advances in tract-tracing methods have recently been made by using transgenic mice that express transneuronal lectin tracers under the cont...

During the last two decades populations of three resident species of Gyps vulture have declined dramatically and are now threatened with extinction in South Asia. Sex identification of vultures is of key importance for the purpose of conservation breeding as it is desirable to have an equal sex ratio in these monogamous species which are housed together in large colony aviaries. Because vulture...

Surgical Department, St. Elisabeth’s Oncology Institute and Medical Faculty of Comenius University, Bratislava, Slovakia Address for correspondence: R. Kralik, MD, PhD, Surgical Department, St. Elisabeth’s Oncology Institute and Medical Faculty of Comenius University, Heydukova 10, SK-812 50 Bratislava, Slovakia. I am sending you a few important notes to the publication in your journal titled R...