125 research outputs found
Modern trends and challenges of development of global aluminum industry
This article overviews complex study into modern trends and challenges of development of global aluminum industry. Dynamics, structure, and segmentation of global aluminum market are discussed in terms of systematic analysis. On this basis strategic map of the industry has been plotted and five forces of competition on global aluminum market have been determined which will influence directly on functioning and development of aluminum producing companies
Search for decays of the B nucleus and Hoyle state in N nucleus dissociation
First results of an analysis to determine contribution of decays of the
unstable Be and B nuclei and the Hoyle 3-state to
dissociation of N 3He (+H) are presented. As the research
material, layers of nuclear track emulsion longitudinally exposed to 2.9
GeV/ N nuclei with at the JINR Nuclotron. Under the assumption that
the He and H fragments retain momentum per nucleon of the primary nucleus,
these unstable states are identified by the invariant mass calculated from the
emission angles of the fragments.Comment: Article materials were presented in the report by A.A. Zaitsev at LXX
International conference Nucleus - 2020,
https://indico.cern.ch/event/839985/contributions/3985257 To be published in
journal "Physics of Particles and Nuclei
Mapping of T7 RNA polymerase active site with novel reagents – oligonucleotides with reactive dialdehyde groups
AbstractOligonucleotides of a novel type containing 2′-O-β-ribofuranosyl-cytidine were synthesized and further oxidized to yield T7 consensus promoters with dialdehyde groups. Both types of oligonucleotides were tested as templates, inhibitors, and affinity reagents for T7 RNA polymerase and its mutants. All oligonucleotides tested retained high affinity towards the enzyme. Wild-type T7 RNA polymerase and most of the mutants did not react irreversibly with oxidized oligonucleotides. Affinity labeling was observed only with the promoter-containing dialdehyde group in position (+2) of the coding chain and one of the mutants tested, namely Y639K. These results allowed us to propose the close proximity of residue 639 and the initiation region of the promoter within initiation complex. We suggest the oligonucleotides so modified may be of general value for the study of protein-nucleic acid interactions
Special features of the Be2He fragmentation in emulsion at an energy of 1.2~A~GeV
The results of investigations of the relativistic Be nucleus
fragmentation in emulsion which entails the production of two He fragments of
an energy of 1.2~A~GeV are presented. The results of the angular measurements
of the Be2He events are analyzed.
The BeBe+n fragmentation channel involving the Be decay from
the ground (0) and the first excited (2) states to two
particles is observed to be predominant.Comment: 10 pages, 6 figures, conference: Conference on Physics of Fundamental
Interactions, Moscow, Russia, 5-9 Dec 2005 (Author's translation
Unstable states in dissociation of relativistic nuclei. Recent findings and prospects of researches
The invariant mass method is used to identify the Be and B nuclei and
Hoyle state formed in dissociation of relativistic nuclei in a nuclear track
emulsion. It is shown that to identify these extremely short-lived states in
the case of the isotopes Be, B, C, C, C, and
O, it is sufficient to determine the invariant mass as a function of the
angles in pairs and triples of He and H fragments in the approximation of the
conservation of momentum per nucleon of the parent nucleus. According to the
criteria established in this way, the contribution of these three unstable
states was evaluated in the relativistic fragmentation of the Si and
Au nuclei.Comment: To be published in the European Physical Journal A. Topical issue
"Light Clusters in Nuclei and Nuclear Matter: Nuclear Structure and Decay,
Heavy Ion Collisions, and Astrophysics
Clustering in light nuclei in fragmentation above 1 A GeV
The relativistic invariant approach is applied to analyzing the 3.3 A GeV
Ne fragmentation in a nuclear track emulsion. New results on few-body
dissociations have been obtained from the emulsion exposures to 2.1 A GeV
N and 1.2 A GeV Be nuclei. It can be asserted that the use of the
invariant approach is an effective means of obtaining conclusions about the
behavior of systems involving a few He nuclei at a relative energy close to 1
MeV per nucleon. The first observations of fragmentation of 1.2 A GeV B
and C nuclei in emulsion are described. The presented results allow one
to justify the development of few-body aspects of nuclear astrophysics.Comment: 7 pages, 8 figures, 3 tables, Nuclear Physics in Astrophysics-2,
16-20 May, 2005 (ATOMKI), Debrecen, Hungar
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