Vrije Universiteit Brussel

About: Vrije Universiteit Brussel is a education organization based out in Brussels, Belgium. It is known for research contribution in the topics: Population & Context (language use). The organization has 14295 authors who have published 38258 publications receiving 1203970 citations. The organization is also known as: VUB.

An absence of neutrinos associated with cosmic-ray acceleration in γ-ray bursts

Abstract: Very energetic astrophysical events are required to accelerate cosmic rays to above 10(18) electronvolts. GRBs (c-ray bursts) have been proposed as possible candidate sources(1-3). In the GRB 'fireball' model, cosmic-ray acceleration should be accompanied by neutrinos produced in the decay of charged pions created in interactions between the high-energy cosmic-ray protons and gamma-rays(4). Previous searches for such neutrinos found none, but the constraints were weak because the sensitivity was at best approximately equal to the predicted flux(5-7). Here we report an upper limit on the flux of energetic neutrinos associated with GRBs that is at least a factor of 3.7 below the predictions(4,8-10). This implies either that GRBs are not the only sources of cosmic rays with energies exceeding 10(18) electronvolts or that the efficiency of neutrino production is much lower than has been predicted.

A conceptual framework for analysing sports policy factors leading to international sporting success

Abstract: Although an increasing number of nations invest large amounts of money in sport in order to compete against other nations, there is no clear evidence that demonstrates how sports policies can influence international sporting success. This paper provides an overview of important determinants that can lead to nations enjoying international sporting success. The literature reveals that more than 50% of the determinants of success are macro-level variables that are beyond the control of politicians. The meso-level contains factors that can be influenced by sports policies. An empirically founded theory on the policy factors that determine elite sporting success has not yet been developed. In this paper a conceptual framework will be presented that can be used for making trans-national comparisons of elite sports policies. Nine policy areas, or ‘pillars’, that are thought to have an important influence on international sporting success are logically derived from the literature.

Bacteriocins of Lactic Acid Bacteria: Microbiology, Genetics and Applications

Abstract: Bacteriocins of lactic acid bacteria: microbiology, genetics, and applications , Bacteriocins of lactic acid bacteria: microbiology, genetics, and applications , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

Structure, function and mechanism of thioredoxin proteins

Abstract: Thioredoxins are ubiquitous antioxidant enzymes that play important roles in many health-related cellular processes. As such, the fundamental knowledge of how these enzymes work is of prime importance for understanding cellular redox mechanisms and for laying the ground for the development of future therapeutic approaches. Over the past 40 years, a really impressive amount of data has been published on thioredoxins. Here, we review the most significant results that have contributed to our knowledge regarding the structure, the function, and the mechanism of these crucial enzymes. Antioxid. Redox Signal. 13, 1205–1216.