18 research outputs found
First occurrences of the greater bonneted Eumops perotis (Molossidae) in the State of ParanĂĄ and synthesis of the known records for Brazil
Fauna de morcegos em remanescentes urbanos de Cerrado em Campo Grande, Mato Grosso do Sul
A MODEST review
We present an account of the state of the art in the fields explored by the
research community invested in 'Modeling and Observing DEnse STellar systems'.
For this purpose, we take as a basis the activities of the MODEST-17
conference, which was held at Charles University, Prague, in September 2017.
Reviewed topics include recent advances in fundamental stellar dynamics,
numerical methods for the solution of the gravitational N-body problem,
formation and evolution of young and old star clusters and galactic nuclei,
their elusive stellar populations, planetary systems, and exotic compact
objects, with timely attention to black holes of different classes of mass and
their role as sources of gravitational waves.
Such a breadth of topics reflects the growing role played by collisional
stellar dynamics in numerous areas of modern astrophysics. Indeed, in the next
decade, many revolutionary instruments will enable the derivation of positions
and velocities of individual stars in the Milky Way and its satellites and will
detect signals from a range of astrophysical sources in different portions of
the electromagnetic and gravitational spectrum, with an unprecedented
sensitivity. On the one hand, this wealth of data will allow us to address a
number of long-standing open questions in star cluster studies; on the other
hand, many unexpected properties of these systems will come to light,
stimulating further progress of our understanding of their formation and
evolution.Comment: 42 pages; accepted for publication in 'Computational Astrophysics and
Cosmology'. We are much grateful to the organisers of the MODEST-17
conference (Charles University, Prague, September 2017). We acknowledge the
input provided by all MODEST-17 participants, and, more generally, by the
members of the MODEST communit
Iron assimilation in plants: reduction of a ferriphytosiderophore by NADH:nitrate reductase from squash
Occurrence of white-winged vampire bat, Diaemus youngi (Mammalia, Chiroptera), in the Cerrado of Distrito Federal, Brazil OcorrĂȘncia de Diaemus youngi (Mammalia, Chiroptera) no Cerrado do Distrito Federal
Authors cite Diaemus youngi (Jentik, 1893) as occurring in all the Brazilian territory. In spite of that, there are no reports of capture sites for D. youngi in the literature for Distrito Federal or Cerrado of Central Brazil. Here we report the first precise record of this species for Central Brazil, rural area of Distrito Federal, and provide information on its biology, conservation and distribution in Brazil, according to our data and information from the literature.<br>A espécie Diaemus youngi (Jentik, 1893) é considerada por alguns autores como ocorrendo para todo o Brasil incluindo o bioma Cerrado e årea rural do Distrito Federal. No entanto não hå na literatura nenhum registro do local de coleta dessa espécie para essas regiÔes. Reportamos aqui o primeiro registro no Cerrado do Brasil Central, årea rural do Distrito Federal, e alguns dados sobre a biologia, conservação e distribuição geogråfica da espécie no Brasil, de acordo com dados desse trabalho e da literatura
The Arabidopsis Nuclear Pore and Nuclear Envelope
The nuclear envelope is a double membrane structure that separates the eukaryotic cytoplasm from the nucleoplasm. The nuclear pores embedded in the nuclear envelope are the sole gateways for macromolecular trafficking in and out of the nucleus. The nuclear pore complexes assembled at the nuclear pores are large protein conglomerates composed of multiple units of about 30 different nucleoporins. Proteins and RNAs traffic through the nuclear pore complexes, enabled by the interacting activities of nuclear transport receptors, nucleoporins, and elements of the Ran GTPase cycle. In addition to directional and possibly selective protein and RNA nuclear import and export, the nuclear pore gains increasing prominence as a spatial organizer of cellular processes, such as sumoylation and desumoylation. Individual nucleoporins and whole nuclear pore subcomplexes traffic to specific mitotic locations and have mitotic functions, for example at the kinetochores, in spindle assembly, and in conjunction with the checkpoints. Mutants of nucleoporin genes and genes of nuclear transport components lead to a wide array of defects from human diseases to compromised plant defense responses. The nuclear envelope acts as a repository of calcium, and its inner membrane is populated by functionally unique proteins connected to both chromatin andâthrough the nuclear envelope lumenâthe cytoplasmic cytoskeleton. Plant nuclear pore and nuclear envelope researchâpredominantly focusing on Arabidopsis as a modelâis discovering both similarities and surprisingly unique aspects compared to the more mature model systems. This chapter gives an overview of our current knowledge in the field and of exciting areas awaiting further exploration
High Energy Physics Opportunities Using Reactor Antineutrinos
Nuclear reactors are uniquely powerful, abundant, and flavor-pure sources of antineutrinos that continue to play a vital role in the US neutrino physics program. The US reactor antineutrino physics community is a diverse interest group encompassing many detection technologies and many particle physics topics, including Standard Model and short-baseline oscillations, BSM physics searches, and reactor flux and spectrum modeling. The community's aims offer strong complimentary with numerous aspects of the wider US neutrino program and have direct relevance to most of the topical sub-groups composing the Snowmass 2021 Neutrino Frontier. Reactor neutrino experiments also have a direct societal impact and have become a strong workforce and technology development pipeline for DOE National Laboratories and universities. This white paper, prepared as a submission to the Snowmass 2021 community organizing exercise, will survey the state of the reactor antineutrino physics field and summarize the ways in which current and future reactor antineutrino experiments can play a critical role in advancing the field of particle physics in the next decade