Nuclear Tracks
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Sobre a influência de fatores ambientais nos níveis de radônio em cavernas dos Parques Estaduais do Vale do Ribeira, SP e avaliação do equilíbrio radioativo e fator de equilíbrio entre radônio e seus descendentes / On the influence of environmental factors on radon levels in caves of Ribeira Valley State Parks, SP and evaluation of radioactive equilibrium and equilibrium factor between radon and its progeny
In the present study it was carried out the monitoring of radon in caves distributed among three state parks of Sao Paulo. The radon concentration were determinate in Morro Preto and Santana caves, located at PETAR Parque Estadual Turístico do Alto Ribeira (High Ribeira River Tourist State Park), Diabo cave, situated in PEJ Parque Estadual de Jacupiranga (J
Publicado em: 2011
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2. Estudo comparativo das respostas de monitores de Rn-222 que utilizam o CR-39 como detector de tracos de particulas alfa / Response comparative study os Rn-222 alpha particle track monitors
This work was a comparative study between the responses of three monitors, the NRPB, an acrylic monitor (in thin film geometry) and the aluminum monitor (also thin film geometry) in controled and mixed environment. The experiments consisted on placing the monitors in a plastic tube, with a radio-226 source internal. Only internal CR-39 plastic detectors were
Publicado em: 2010
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3. Sequential and double sequential fission observed in heavy ion interaction Of (11.67 MeV/u)197Au projectile with 197Au target
The heavy ion interaction of 11.67 MeV/u 197Au + 197Au has been investigated using mica as a passive detector. By employing Solid State Nuclear Track Detection Technique the data of elastic scattering as well as inelastic reaction channel was collected. The off-line data analysis of multi-pronged events was performed by measuring the three-dimensional geomet
Brazilian Journal of Physics. Publicado em: 2009-09
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4. Non invasive methods for genetic analysis applied to ecological and behavioral studies in Latino-America
Documenting the presence and abundance of the neotropical mammals is the first step for understanding their population ecology, behavior and genetic dynamics in designing conservation plans. The combination of field research with molecular genetics techniques are new tools that provide valuable biological information avoiding the disturbance in the ecosystem
Revista Brasileira de Zootecnia. Publicado em: 2007-07
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5. Estudo da formação de rastos nucleares em polímeros / Study of the Nuclear Tracks Formation in Polymers
The research in the field of material modification with ion implantation has greately improved, stimulated by technological applications in biology, medicine, electronics and other related areas. One of the correlated aspects in understanding these new materials is the identification and characterization of the damage produced by ion beam irradiation. In thi
Publicado em: 2007
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6. Estudo do annealing de traços de fissão em apatitas, tanto em seções basais como em seções sem orientação preferencial, a partir do comprimento e da densidadede de traços de fissão
We studied the annealing of fission track in apatite aiming two goals: to be able to produce na experimental data set that is more complete than those found in the literature and to contribute to a better understanding of this process. We measured superficial density of fission tracks and estricted length measurements to the tracks totally confined inside th
Publicado em: 1998
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7. Highly localized tracks of human immunodeficiency virus type 1 Nef in the nucleus of cells of a human CD4+ T-cell line.
A human T-cell line constitutively expressing the nef gene from the human immunodeficiency virus type 1 SF2 isolate was used to examine the distribution of the Nef protein in the nucleus. High-resolution immunogold labeling/electron microscopic studies with polyclonal anti-Nef antibodies on nef+ and nef- cells revealed that a small fraction of Nef is in the
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8. 4-D single particle tracking of synthetic and proteinaceous microspheres reveals preferential movement of nuclear particles along chromatin – poor tracks
BioMed Central.
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9. The spatial targeting and nuclear matrix binding domains of SRm160
The Ser-Arg (SR)-related protein SRm160 is a coactivator of pre-mRNA splicing. It bridges splicing factors located at the 5′ splice site, branch site, and 3′ splice site. Recently, SRm160 has also been shown to be involved in mRNA export as part of an exon-junction complex. SRm160 is highly concentrated in splicing speckles but is also present in long br
The National Academy of Sciences.
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10. Adenovirus Type 5 E4orf3 Protein Relieves p53 Inhibition by E1B-55-Kilodalton Protein
The E1B-55-kDa protein of adenovirus type 5 and the p53 tumor suppressor gene product form a complex that localizes to the cytoplasm, thereby downregulating p53’s transcriptional activity. The E4orf6 protein binds and relocalizes E1B-55-kDa, and the proteins act synergistically to inactivate p53. We show that another adenovirus E4 gene product, E4orf3, is
American Society for Microbiology.
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11. Microspectroscopic imaging tracks the intracellular processing of a signal transduction protein: fluorescent-labeled protein kinase C beta I.
We have devised a microspectroscopic strategy for assessing the intracellular (re)distribution and the integrity of the primary structure of proteins involved in signal transduction. The purified proteins are fluorescent-labeled in vitro and reintroduced into the living cell. The localization and molecular state of fluorescent-labeled protein kinase C beta I
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12. M-FISH analysis shows that complex chromosome aberrations induced by α-particle tracks are cumulative products of localized rearrangements
Complex chromosome aberrations are characteristically induced after exposure to low doses of densely ionizing radiation, but little is understood about their formation. To address this issue, we irradiated human peripheral blood lymphocytes in vitro with 0.5 Gy densely ionizing α-particles (mean of 1 α-particle/cell) and analyzed the chromosome aberrations
National Academy of Sciences.