Counters
Mostrando 25-36 de 53 artigos, teses e dissertações.
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25. The RdgC protein of Escherichia coli binds DNA and counters a toxic effect of RecFOR in strains lacking the replication restart protein PriA
PriA protein provides a means to load the DnaB replicative helicase at DNA replication fork and D loop structures, and is therefore a key factor in the rescue of stalled or broken forks and subsequent replication restart. We show that the nucleoid-associated RdgC protein binds non-specifically to single-stranded (ss) DNA and double-stranded DNA. It is also
Oxford University Press.
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26. High counting rates from 125I in radioimmunoassays
Responses from one manual and four automatic gamma counters for assaying 125I were compared. The resolution times quoted by manufacturers when applied in a standardized correction formula to obtain true counts from observed counting rates above 104 counts per second appeared to be inadequate. The need to investigate the errors associated with high counting r
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27. Spontaneous bacterial peritonitis
Spontaneous bacterial peritonitis (SBP) is the infection of ascitic fluid in the absence of any intra‐abdominal, surgically treatable source of infection. Despite timely diagnosis and treatment its reported incidence in ascitic patients varies between 7–30%. Ascitic paracentesis remains the chief diagnostic procedure. Automated cell counters have the sam
BMJ Group.
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28. Hypochromic macrocytes: are they reticulocytes?
Automated full blood counters measuring the size and haemoglobin concentration of individual red cells by high and low angle light scatter can provide estimates of the percentage of cells which are abnormal in either or both of these variables. The hypothesis that an increase in the number of large cells with a reduced haemoglobin content ("hypochromic macro
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29. Evaluation of a prototype for a reference platelet counter.
A semiautomated single channel aperture-impedance particle counter was developed as a prototype for a reference platelet count for assigning values to reference preparations used in automated blood cell counts. The instrument is equipped with sheath flow and an aperture orifice of 50 microns in diameter and 60 microns in length to eliminate non-axial flow an
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30. Long-term outcome after coronary stenting
The present review assesses the data on long-term outcome after coronary stenting. Histological, angiographical and intravascular imaging data have shown that the insertion of stents constitutes only a transient stimulus to lumen renarrowing, that this process is almost complete at 6 months and that a certain degree of neointima regression is also possible a
BioMed Central.
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31. Liquid Scintillation Vial for Cumulative and Continuous Radiometric Measurement of In Vitro Metabolism
A two-compartment vial is described in which suspensions of bacteria, cells, or tissues may be cultured and their growth and metabolism measured radiometrically by using a liquid scintillation counter. The device consists of a scintillation vial lined with a cylinder of scintillating paper into which is placed a sterilized inner culture vial containing a car
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32. 8-Classtype Tallying Device and Counter
An electronic device using transistor-transistor-logic integrated circuits as primary building blocks was designed and constructed to accumulate counts for eight classtypes. Selection of the classtypes is provided for by three encoders, X, Y, and Z. Using these encoders allows selection of memory counters for accumulations of 0 to 99 counts per classtype. Ma
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33. Active site and complete sequence of the suicidal methyltransferase that counters alkylation mutagenesis.
The inducible resistance to alkylation mutagenesis and killing in Escherichia coli (the adaptive response) is controlled by the ada gene. The Ada protein acts both as a positive regulator of the response and as a DNA repair enzyme, correcting premutagenic O6-alkylguanine in DNA by suicidal transfer of the alkyl group to one of its own cysteine residues. We h
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34. Role of left inferior prefrontal cortex in retrieval of semantic knowledge: A reevaluation
A number of neuroimaging findings have been interpreted as evidence that the left inferior frontal gyrus (IFG) subserves retrieval of semantic knowledge. We provide a fundamentally different interpretation, that it is not retrieval of semantic knowledge per se that is associated with left IFG activity but rather selection of information among competing alter
The National Academy of Sciences of the USA.
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35. The transcriptional responses of respiratory epithelial cells to Bordetella pertussis reveal host defensive and pathogen counter-defensive strategies
Bordetella pertussis, the causative agent of whooping cough, has many well-studied virulence factors and a characteristic clinical presentation. Despite this information, it is not clear how B. pertussis interaction with host cells leads to disease. In this study, we examined the interaction of B. pertussis with a human bronchial epithelial cell line (
The National Academy of Sciences.
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36. The High-Risk Human Papillomavirus Type 16 E6 Counters the GAP Function of E6TP1 toward Small Rap G Proteins
We have recently identified E6TP1 (E6-targeted protein 1) as a novel high-risk human papillomavirus type 16 (HPV16) E6-binding protein. Importantly, mutational analysis of E6 revealed a strong correlation between the transforming activity and its abilities to bind and target E6TP1 for ubiquitin-mediated degradation. As a region within E6TP1 has high homology
American Society for Microbiology.