Study of nuclear reactions

Heterogeneous nuclear ribonucleoprotein (HNRNP) A1 and A2 are the most abundant HNRNPs with nearly identical functions, and play important roles in regulating gene expression at multiple levels (i.e. transcription, posttranscription, and translation). However, the expression and regulation mechanism of HNRNPA1 and A2 themselves remain unclear. In this study, the amino acid sequences of HNRNPA1 and HNRNPA2 were compared and found to have 78% and 86% homology in key functional domains.

10p thiencuuchu 27-11-2021 10 1   Download

This study aims at better understanding the chemical and physico-chemical phenomena of uranium dioxide dissolution reactions in nitric acid media in the Purex process, which separates the reusable materials and the final wastes of the spent nuclear fuels.

13p christabelhuynh 29-05-2020 12 0   Download

N-Heterocyclic carbenes are widely used in organic reactions and coordination chemistry. In the present study, 2,3-dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (1) is reacted with diphenyl disulfide, methyl phenyl disulfide, and bis(methylsulfonyl)methane to yield target compounds 5, 6, and 7 respectively.

6p tocectocec 25-05-2020 5 0   Download

In present paper, ADU has been produced via both the routes. Variation of uranium recovery and crystal structure and composition of ADU with progress in precipitation reaction has been studied with special attention on first appearance of the precipitate Further, ADU produced by two routes have been calcined to UO3, then reduced to UO2 and hydroflorinated to UF4. Effect of two different process routes of ADU precipitation on the characteristics of ADU, UO3, UO2 and UF4 were studied here.

8p minhxaminhyeu4 26-06-2019 32 0   Download

The control rod assembly controls reactor power by adjusting its position during normal operation and shuts down chain reactions by its free drop under scram conditions. Therefore, the drop performance of the control rod assembly is important for the safety of a nuclear reactor. In this study, the drop performance of the conceptually designed control rod assembly for the prototype generation IV sodium-cooled fast reactor that is being developed at the Korea Atomic Energy Research Institute as a next-generation nuclear reactor was experimentally investigated.

10p minhxaminhyeu4 26-06-2019 25 0   Download

For the design of ADS (Accelerator Driven System), it is important to study neutron spectra and details of nuclear reactions induced by neutrons. Furthermore, neutron energy and angular distribution data are important for a correct simulation of the propagation of particles inside a spallation target and the geometrical distribution of the outgoing neutron flux.

6p bautroibinhyen17 13-02-2017 45 3   Download

This dissertation is constructed by an overview, three chapters and the conclusion; the general knowledge of nuclear physics, astrophysics and the goals of this work are mentioned in the first chapter; the basic theory of the stellar reaction rate and the matrix method used to determine reaction rate is also mentioned in this part.

153p fujijudo87 07-07-2014 72 10   Download

Human immunodeficiency virus type 1 protein R (HIV-1 Vpr) promotes nuclear entry of viral nucleic acids in nondividing cells, causes G2 cell cycle arrest and is involved in cellular differentiation and cell death. Vpr subcellular localization is as variable as its functions. It is known, that consistent with its role in nuclear transport, Vpr localizes to the nuclear envelope of human cells. Further, a reported ion channel activity of Vpr is clearly dependent on its localization in or at membranes.

6p system191 01-06-2013 33 4   Download

In a previous study we showed that natural polyamines interact in the nuclear environment with phosphate groups to form molecular aggregates [nuclear aggregates of polyamines (NAPs)] with estimated molecular mass values of 8000, 4800 and 1000 Da. NAPs were found to interact with genomic DNA, influence its conformation and interfere with the action of nucleases.

11p fptmusic 11-04-2013 43 2   Download

The ability ofEntamoeba histolyticaTATA binding protein (EhTBP) to interact with different TATA boxes in gene promoters may be one of the key factors to perform an efficient transcription in this human parasite. In this paper we used several TATA variants to study the in vitro EhTBP DNA-binding activity and to determine the TATA-EhTBP dissociation constants. The presence of EhTBP in complexes formed by nuclear extracts (NE) and the TATTTAAA oligonucleotide, which corresponds to the canonical TATA box for E. histolytica, was demonstrated by gel-shift assays. ...

13p awards 06-04-2013 45 1   Download

The staphylococcal enterotoxins produced byStaphylococcus aureusare associated with pyrogenic response in humans and primates. This study investigates the role of NADPH oxidase and nuclear factor-kappa B (NF-jB) on enterotoxin staphylococcal enterotoxin C1 (SEC1)-induced pyrogenic cytokine production in human peripheral blood mononuclear cells (PBMC).

13p galaxyss3 19-03-2013 52 4   Download

Recent studies suggest that diverse types of intronic and small non-coding RNAs play pivotal regulatory roles, often as a part of ribonucleoprotein (RNP) complexes, in a variety of cellular proces-ses such as transcription and translation. Thus, isolation and char-acterization of novel RNP complexes, such as micro RNPs, small nuclear RNPs, small nucleolar RNPs, and heteronuclear RNPs, are crucial to understand the biological systems.

20p galaxyss3 19-03-2013 44 2   Download

Accumulation ofb-amyloid protein (Ab) is one of the most important pathological features of Alzheimer’s disease. Although Abinduces neurode-generation in the cortex and hippocampus through several molecular mech-anisms, few studies have evaluated the modulation of transcription factors during Ab-induced neurotoxicity.

10p viettel02 19-02-2013 37 3   Download

EVI1 is a nuclear zinc finger protein essential to normal development, which participates in acute myeloid leukaemia progression and transforms Rat1 fibroblasts. In this study we show that enforced expression of Evi1 in Rat1 fibroblasts protects from paclitaxel-induced apoptosis, consistent with previously published studies.

12p mobifone23 18-01-2013 33 4   Download