نتایج جستجو برای: criticality nuclear fission

تعداد نتایج: 257853  

Journal: :Journal of cell science 2005
Daniel Tondera Frank Czauderna Katharina Paulick Rolf Schwarzer Jörg Kaufmann Ansgar Santel

Mitochondria are dynamic organelles that change morphology by controlled fission and fusion events. Mitochondrial fission is regulated by a conserved protein complex assembled at the outer membrane. Human MTP18 is a novel nuclear-encoded mitochondrial membrane protein, implicated in controlling mitochondrial fission. Upon overexpression of MTP18, mitochondrial morphology was altered from filame...

2004
M. V. Ricciardi A. V. Ignatyuk A. Kelić P. Napolitani O. Yordanov

Complex structural effects in the nuclide production from the projectile fragmentation of 1 A GeV U nuclei in a titanium target, manifested as an even-odd effect, are reported. The structure seems to be insensitive to the excitation energy induced in the reaction. This is in contrast to the prominent structural features found in nuclear fission and in transfer reactions, which gradually disappe...

Journal: :Current Biology 2010
Shelley Sazer

The fission yeast Schizosaccharomyces pombe undergoes closed mitosis but 'virtual nuclear envelope breakdown' at anaphase of meiosis II, in which the nuclear envelope is structurally closed but functionally open.

Journal: :Chinese Physics C 2021

Abstract Fission properties of the actinide nuclei are deduced from theoretical analysis. We investigate potential energy surfaces and fission barriers predict fragment mass yields isotopes. The results compared with experimental data where available. calculations were performed in macroscopic-microscopic approximation Lublin-Strasbourg Drop (LSD) for macroscopic part, microscopic corrections e...

Journal: :FEMS microbiology letters 2014
Linda Dekker Thomas H Osborne Joanne M Santini

One of the issues facing the nuclear power industry is how to store spent nuclear fuel which is contaminated with radionuclides produced during nuclear fission, including caesium ((134)Cs(+), (135)Cs(+) and (137)Cs(+)) and cobalt ((60)Co(2+)). In this study, we have isolated Co(2+)- and Cs(+)-resistant bacteria from water collected from a nuclear fuel storage pond. The most resistant Cs(+) and ...

2000
M. BRACK Lise Meitner

The explanation of the asymmetry in the fragment mass distributions of many actinide nuclei has long been a stumblestone in fission theory. Shortly after the advent of the shell model, Lise Meitner related the mass asymmetry to shell structure, in particular to magic nucleon numbers in one of the fragments. Indeed, since the classical liquid drop model (LDM) prefers symmetric shapes, the mass a...

1995
Boualem Hammouda

III. 1. NUCLEAR FISSION REACTIONS ............................................................................................. 7 III. 2. NUCLEAR REACTORS ............................................................................................................. 7 III. 3. SPALLATION SOURCES ..........................................................................................................

سهیلی , سعید, لامعی لامعی رشتی , محمد, هوشیار, نوشاد ,

  The fission fragment angular distributions have been measured for proton-induced fission of 209Bi and 197Au nuclei using surface barrier detectors at several energies between 25 MeV and 30 MeV. The experimental anisotropies are found to be in agreement with the predictions of the Standard Saddle-Point Statistical Model (SSPSM). The fission cross sections of 209Bi 197Au nuclei were also measur...

Journal: :Current Biology 2002
Katherine W. Osteryoung

Chloroplasts contain three membrane systems that constrict together during division of the organelle. A newly identified protein, ARTEMIS, may shed light on the nuclear control of chloroplast division, and also on the mechanism of thylakoid membrane fission and how this is coordinated with fission of the two envelope membranes.

2005
N. Yamano A. Hasegawa K. Kato M. Igashira

A research and development (R&D) project on a nuclear data processing and utilization system was started in 2002 for a five-year plan for innovative nuclear energy systems such as innovative reactors and accelerator-driven systems. The nuclear data processing and utilization system is being developed to use on a PC-Linux server through the Internet, so that it has a graphic user interface (GUI)...

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