'TAHE first of the two annual conversaziones which A are given by the Royal Society in its rooms at Burlington House, took place on Wednesday evening, May 16. There was a large attendance, and throughout the evening interested groups were gathered round the exhibits which were shown in the Officers' Room, the Council Room, the Old Council Room, the Principal Library, the Committee Room, and the...

background: searching for factors that reduce the adverse effect of heat stress (hs) on broiler performance has particular importance. objectives: the present study was designed to investigate the influence of dietary melatonin, gamma-amino butyric acid (gaba) and dark period on growth performance, carcass characteristics and blood parameters of broiler under heat stress condition. methods: a t...

The “edge” of the Antarctic polar vortex is known to behave as a barrier to the meridional (poleward) transport of ozone during the austral winter. This chemical isolation of the polar vortex from the middle and low latitudes produces an ozone minimum in the vortex region, intensifying the ozone hole relative to that which would be produced by photochemical processes alone. Observational determ...

The aims of the paper are (i) to describe the annual distribution of extreme runoff events on the Mura, Drava and Sava Rivers, (ii) to demonstrate their association with moisture fluxes, and (iii) to explain their annual distribution by moisture flux climatology. Extreme runoff events were defined as rapid increases in daily mean discharge. Moisture flux anomalies were studied within six pixels...

Centro Nacional de Biotecnología, Campus Univ. Autónoma, 28049 Madrid, Spain, Health Research Inc., Howard Hughes Medical Institute at Wadsworth Center, Empire State Plaza, Albany, NY 12201-0509, and Department of Biomedical Sciences, State University of New York at Albany, University of Konstanz, Department of Biology, 78457 Konstanz, Germany, Max-Planck-Institut fur Biophysik, Frankfurt, Germany

Background: During male germ cells differentiation, genomewide re-organizations and highly specific programming of the male genome occur. These changes not only include the large-scale meiotic shuffling of genes, taking place in spermatocytes, but also a complete “re-packaging” of the male genome in post meiotic cells, leading to a highly compacted nucleo-protamine structure in the mature sperm...