Nicks
Mostrando 1-12 de 229 artigos, teses e dissertações.
-
1. BRINCANDO DE SER NA REALIDADE VIRTUAL: UMA VISÃO POSITIVA DA SUBJETIVIDADE CONTEMPORÂNEA / EXPERIMENTING DIFFERENT WAYS OF BEING IN VIRTUAL REALITY: A POSITIVE VIEW OF CONTEMPORARY SUBJECTIVITY
Desde o fim do século XX, um grande número de publicações vem tratando das mudanças políticas, econômicas, tecnológicas e sociais que estão ocorrendo no mundo. Todas essas macro-mudanças têm gerado também transformações no plano micro (ou subjetivo), o que não passou despercebido por vários autores. A maioria destes, todavia, lança sobre o s
Publicado em: 2007
-
2. Investigation on diamond turning of silicon crystal - generation mechanism of surface cut with worn tool
This paper discusses the effect of tool wear on surface finish in single-point diamond turning of single crystal silicon. The morphology and topography of the machined surface clearly show the type of cutting edge wear reproduced onto the cutting grooves. Scanning electron microscopy is used in order to correlate the cutting edge damage and microtopography f
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
-
3. Sequence analysis of the nicks and termini of bacteriophage T5 DNA.
Bacteriophage T5 DNA, when isolated from mature phage particles, contains several nicks in one of the two strands. The 5'-terminal nucleotides at the nicks were labeled with polynucleotide kinase and [gamma-32P]ATP, and the 3'-terminal nucleotides were labeled with Escherichia coli DNA polymerase I and [alpha-32P]dGTP. The sequences around the nicks were ana
-
4. Distribution of "minor" nicks in bacteriophage T5 DNA.
Bacteriophage T5 DNA can be released from the phage particle in such a way that one end of 5 to 10% of the DNA molecules remains attached to either the phage head or tail. Under partial denaturation conditions, the DNA preferentially denatures in the vicinity of a nick so that the nicks can be located relative to the end that remains attached to the phage he
-
5. Apurinic/apyrimidinic endonucleases in repair of pyrimidine dimers and other lesions in DNA.
The characteristics of the nicks (single-strand breaks) introduced into damaged DNA by Escherichia coli endonucleases III, IV, and VI and by phage T4 UV endonuclease have been investigated with E. coli DNA polymerase I (DNA nucleotidyltransferase). Nicks introduced into depurinated DNA by endonuclease IV or VI provide good primer termini for the polymerase,
-
6. Adenosine-guanosine preferential photocleavage of DNA by azido-benzoyl- and diazocyclopenta-dienylcarbonyloxy derivatives of 9-aminoacridine.
The photoreactions of 9-[6-(4-azidobenzamido)hexylamino]acridine (AHA) and 9-[6-(2-diazocyclopentadienylcarbonyloxy)hexylamino]acridine (DHA) with double stranded DNA result in formation of single strand nicks and alkali labile sites (adducts) with an efficiency of 6 x 10(-3) nicks per AHA and 3 x 10(-2) nicks per DHA molecule. The alkali dependent DNA cleav
-
7. Restoration of the strictured gullet 1
Nicks, R. (1973).Thorax, 28, 498-510. Restoration of the strictured gullet. Local plastic procedures which restore the lumen of the oesophagus are a satisfactory mode of treatment for patients with localized strictures, provided the remainder of the oesophagus is healthy and that a valvular sphincteric mechanism is restored.
-
8. Chromosomes in living Escherichia coli cells are segregated into domains of supercoiling.
Torsional tension in the DNA double helix can be detected in living cells of Escherichia coli from measurements of the rate of trimethylpsoralen photobinding to the intracellular DNA. Here we show that this tension is relaxed in vivo when single-strand DNA breaks are introduced by gamma-irradiation and that approximately 160 nicks per genome equivalent of DN
-
9. Initiation of heteroduplex-loop repair by T4-encoded endonuclease VII in vitro.
Heteroduplex DNAs with single-stranded loops of 51 nt or 8 nt were constructed in vitro and used in reactions with purified endonuclease VII (endo VII) from phage T4. The enzyme makes double-strand breaks by introducing pairs of staggered nicks flanking the loops. Regardless of loop-size the nicking sites map exclusively at the 3' side of the loop in the loo
-
10. Unique Double-Stranded Fragments of Bacteriophage T5 DNA Resulting from Preferential Shear-Induced Breakage at Nicks
Nicks within one strand of the bacteriophage T5 DNA molecule act as “ weak points” for a novel kind mechanical breakage that can be utilized for “dissecting” the genome. The products from sheared T5+ DNA include five unique double-stranded segments of the molecule and various combinations of adjacent segments. These specific fragments are not obtaine
-
11. Nuclear extracts of chicken embryos promote an active demethylation of DNA by excision repair of 5-methyldeoxycytidine.
Here I show that nuclear extracts of chicken embryos can promote the active demethylation of DNA. The evidence shows that in hemimethylated DNA (i.e., methylated on one strand only) demethylation of 5mCpG occurs through nucleotide excision repair. The first step of demethylation is the formation of specific nicks 5' from 5-methyldeoxycytidine. Nicks are also
-
12. Empyema and Ruptured Lung Abscess in Adults 1