Fission Fragments
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Bacteria arise at the border of mycoplasma-infected HeLa cells, containing cytoplasm with either malformed cytosol, mitochondria and endoplasmic reticulum or tightly adjoined smooth vacuoles
ABSTRACT A study with transmission electron microscopy of mycoplasma-contaminated HeLa cells using five cell donors referred to as donors A, B, C, D and E, observations are herein presented. Experiments performed with cells from donors B, C and D, revealed the presence of Mycoplasma hyorhinis after PCR and sequencing experiments. Bacteria probably originated
Rev. Inst. Med. trop. S. Paulo. Publicado em: 21/12/2017
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2. Estudo de traços de fissão em vidro utilizando-se microscopias de força atomica e eletronica de varredura : inferencia da estrutura de traços latentes a partir de traços atacados / Glass fission track analysis by AFM and SEM : inferring latent track structure trough etched tracks
A study on the geometric evolution of 235U induced fission tracks in a soda-lime glass was made. It was necessary to know about the geometric model for structure evolution of fission tracks in isotropic materials. This model is based on the competition of two chemical etching rates: one in the bulk material (VB) and another in each fragment trajectory (VT).
Publicado em: 2008
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3. EXPERIMENTAL AND THEORETICAL ANALYSIS OF (NH3)NNHM(+)(-) ION CLUSTERS DESORBED FROM SOLID AMMONIA BOMBARDED BY 65 MEV ION PROJECTILES / ESTUDO TEÓRICO E EXPERIMENTAL DE AGREGADOS IÔNICOS (NH3)NNHM(+)(-) DESSORVIDOS DE AMÔNIA SÓLIDA BOMBARDEADA POR ÍONS DE 65 MEV
Um espectrômetro de massa tipo tempo-de-vôo, montado no Laboratório Nacional de Luz Síncrotron (Campinas - SP), foi utilizado para analisar os íons dessorvidos de uma amostra de amônia condensada (temperaturas de análise: 25 a 150 K) ao ser impactada por fragmentos de fissão do 252Cf. O espectrômetro permite identificar e determinar as abundâncias
Publicado em: 2007
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4. 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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5. Beyond the Rayleigh instability limit for multicharged finite systems: From fission to Coulomb explosion
We address the stability of multicharged finite systems driven by Coulomb forces beyond the Rayleigh instability limit. Our exploration of the nuclear dynamics of heavily charged Morse clusters enabled us to vary the range of the pair potential and of the fissibility parameter, which results in distinct fragmentation patterns and in the angular distributions
The National Academy of Sciences.
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6. Construction of a Not I restriction map of the fission yeast Schizosaccharomyces pombe genome.
Pulsed field gel electrophoresis and large DNA technology were used to construct a Not I restriction map of the entire genome of the fission yeast Schizosaccharomyces pombe. There are 14 detectable Not I sites in S. pombe 972h: 9 sites on chromosome I and 5 sites on chromosome II, while no Not I sites were found on chromosome III. The 17 fragments (including
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7. Importance of Mitochondrial Dynamics During Meiosis and Sporulation
Opposing fission and fusion events maintain the yeast mitochondrial network. Six proteins regulate these membrane dynamics during mitotic growth—Dnm1p, Mdv1p, and Fis1p mediate fission; Fzo1p, Mgm1p, and Ugo1p mediate fusion. Previous studies established that mitochondria fragment and rejoin at distinct stages during meiosis and sporulation, suggesting tha
The American Society for Cell Biology.
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8. Dicer is required for chromosome segregation and gene silencing in fission yeast cells
RNA interference is a form of gene silencing in which the nuclease Dicer cleaves double-stranded RNA into small interfering RNAs. Here we report a role for Dicer in chromosome segregation of fission yeast. Deletion of the Dicer (dcr1+) gene caused slow growth, sensitivity to thiabendazole, lagging chromosomes during anaphase, and abrogated silencing of centr
National Academy of Sciences.
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9. Construction of an expression vector for the fission yeast Schizosaccharomyces pombe.
We have isolated and characterized a S. pombe promoter using a functional heterologous gene product assay. Random S. pombe genomic fragments were cloned upstream from the promoterless 'lacZ gene and tested in vivo for their efficiency to promote expression of the beta-galactosidase protein in the fission yeast. An efficient S. pombe promoter called 54/1 was
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10. A Schizosaccharomyces pombe artificial chromosome large DNA cloning system.
The feasibility of using the fission yeast, Schizosaccharomyces pombe , as a host for the propagation of cloned large fragments of human DNA has been investigated. Two acentric vector arms were utilized; these carry autonomously replicating sequences ( ars elements), selectable markers ( ura4(+) or LEU2 ) and 250 bp of S. pombe terminal telomeric repeats. Al
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11. Structural organization and functional analysis of centromeric DNA in the fission yeast Schizosaccharomyces pombe.
Centromeric DNA in the fission yeast Schizosaccharomyces pombe was isolated by chromosome walking and by field inversion gel electrophoretic fractionation of large genomic DNA restriction fragments. The centromere regions of the three chromosomes were contained on three SalI fragments (120 kilobases [kb], chromosome III; 90 kb, chromosome II; and 50 kb, chro
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12. The silent P mating type locus in fission yeast contains two autonomously replicating sequences.
We show that in fission yeast two DNA fragments at the silent P mating type locus provide plasmids with the capability of autonomous replication. Bacterial vectors containing these sequences replicate in a polymeric form in fission yeast very much like plasmids with the commonly used replication sequence ars1, do. There are, however, several differences betw