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Showing 1 to 20 of 587 for “"fission"”.
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Singlet fission photovoltaics
… lose energy by thermalization. Singlet exciton fission splits a high-energy molecular excitation ("singlet" exciton) into a pair of lowenergy ones ("triplet" excitons). In solar cells, it promises to generate two electrons per photon, potentially overcoming the singlet junction efficiency limit. …
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Fail-safe source-driven fission and fusion-fission hybrid reactor configurations
… a unity infinite medium multiplication factor fission core (1k), is investigated for both fission and fusion-fission hybrid systems. Suchaconfiguration is thought to offer adesirable fail-safe reactor alternative in that the loss of the fission or the fusion neutron sourceswould automatically …
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Fission dynamics in a microscopic theory
… functional theory (TDDFT) to investigate the fission dynamics of atomic nucleus, which is still one of the most complicated problem in nuclear physics and a full microscopic interpretation is still missing. The establishment of the time-dependent superfluid local density approximation (TDSLDA) …
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Mitochondrial Fission After Traumatic Brain Injury
… undergo regulated processes of fusion and fission and functionally adapt to changes in the cellular environment. An imbalance of these processes can disrupt the ability for mitochondria to functionally meet the metabolic needs of the cell, therefore resulting in mitochondrial damage and …
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Cell Size Control in Fission Yeast
… clear mechanisms have yet to be elucidated. The fission yeast Schizosaccharomyces pombe is an ideal model organism whose simple but conserved cell biology has led to the identification of many important cell size regulators common to all eukaryotes. In this thesis, I have quantitatively analyzed …
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Neutron spectrum from 252Cf spontaneous fission
… of the neutron spectrum from the spontaneous fission of 252Cf in the restframe of the fragment by simultaneous observation of the neutron time-of-flight and the fragment velocity. The fragments were detected by means of thin film plastic scintillators in which the scintillation pulse-height …
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The Photo-Fission of Heavy Elements
Made available in DSpace on 2014-12-05T19:35:49Z (GMT). No. of bitstreams: 1 0007844.pdf: 5346098 bytes, checksum: 90ba058997100a933d545854c87b52ab (MD5) Previous issue date: 1954
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An ionization chamber for fission fragment analysis
Fission fragments play a pivotal role in understanding the entire nuclear fission process, and their effects are widespread to all applications involving nuclear fission: reactor design and maintenance, waste removal, active and passive integration of nuclear materials, simulations, and the …
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Roles of H2A.z in Fission Yeast Chromatin
… one of the seven JmjC Domain Proteins (JDPs) in Fission Yeast. JDPs are known to function in chromatin and some act as histone demethylases. We found that Msc1 is a member of Swr1 Complex which is known to exchange histone H2A variant H2A.z in nucleosomes. We purified H2A.z as a member of Swr1 …
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Measurements of fission product sorption on graphite
… temperature reactors (VHTRs) require data for fission product (FP) adsorption on graphite at high temperatures. The adsorption and vapor pressures of silver on nuclear moderator grade IG-110 graphite were measured in the range of 1000-1400K. Knudsen Effusion Mass Spectrometry (KEMS) was used …
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Tracking translation factors in fission yeast nucleus
Translation factors are essential components of the ribosome, yet it has been reported that many ribosomal proteins (RPs) and other translation factors are found at transcription sites of Drosophila melanogaster (D. melanogaster) polytene chromosomes. Whilst these findings might indicate the …
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Independent fission yields of some xenon isotopes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1962.
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Quantum efficiency and fission rate in tetracene
Using singlet fission in a photovoltaic cell, the theoretical energy conversion efficiency limit is larger than the Shockley-Queisser limit due to two excitons produced with one incident photon. In a singlet fission material, an absorbed photon excites a singlet exciton and then split into two …
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Heat removal system for fission converter tank
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Yield, Kinetic Energy, Pairing Effect, and Shell Effect of Light Fission Products for Thermal-Neutron Fission of Uranium-233
… chamber to determine the yields of light fission products for thermal-neutron fission of U-233. HIAWATHA has an energy resolution of 0.3%, a mass resolution of 0.5 amu, and an atomic-number resolving power of 38. The yields were measured as a function of mass number, atomic number, and …
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Direct and absolute measurements of average yield of neutrons in thermal fission of U²³⁵ and spontaneous fission of Cf²⁵²
… and prompt-neutron coincidence calibration of fission counters, have been carried out to obtain independent evaluations the total yield of neutrons in thermal fission of U²³⁵[ν̅(U²³⁵)] and spontaneous fission of Cf²⁵²[ν̅(Cf²⁵²)]. In this experiment, the neutron-fission coincidence phase was …
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Mechanisms of genomic stability maintenance in fission yeast
DNA replication consists of two distinct steps: the licensing step during the G1 phase and the initiation step at the G1 to S transition point. During licensing, two inactive complexes of the replicative helicases, MCMs, are loaded onto all the potential origins of replication (ORIs), through the …
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Burn Serum Stimulates Mitochondrial Fission in C2C12 Myoblasts
… designed to investigate changes in mitochondrial fission and fusion in response to a burn serum challenge in myoblasts in vitro. METHODS: Cultured murine myoblasts, C2C12 cells, w ere exposed to 10% rat serum isolated either from 40% total body surface area (TBSA) scald burn rats or control rats. …
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Fission Multiplicity Distribution Sampling in MCNP6 Criticality Calculations
… to the average number of neutrons emitted in fission of the system. It can be shown that if the average number of neutrons emitted in fission and the average neutron energy spectrum is conserved, the criticality of a system remains the same without regard to the actual physical fission …
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