305 research outputs found
Fundamental Solutions and Decay of Fully Non-local Problems
In this paper, we study a fully non-local reaction-diffusion equation which
is non-local both in time and space. We apply subordination principles to
construct the fundamental solutions of this problem, which we use to find a
representation of the mild solutions. Moreover, using techniques of Harmonic
Analysis and Fourier Multipliers, we obtain the temporal decay rates for the
mild solutions
Scattering in the energy space for Boussinesq equations
In this note we show that all small solutions in the energy space of the
generalized 1D Boussinesq equation must decay to zero as time tends to
infinity, strongly on slightly proper subsets of the space-time light cone. Our
result does not require any assumption on the power of the nonlinearity,
working even for the supercritical range of scattering. No parity assumption on
the initial data is needed
Marginality and the position value
We present a new characterization of the position value, one of the most prominent allocation rules for communication situations (graph-games or games with restricted communication). This characterization includes the PL-marginality property, an extension for communications situations of the classic marginality for TU-games, as well as component efficiency and balanced link contributions for necessary players
Auxin and epigenetic regulation of SKP2B, an F-box that represses lateral root formation
In plants, lateral roots originate from pericycle founder cells that are specified at regular intervals along the main root. Here, we show that Arabidopsis (Arabidopsis thaliana) SKP2B (for S-Phase Kinase-Associated Protein2B), an F-box protein, negatively regulates cell cycle and lateral root formation as it represses meristematic and founder cell divisions. According to its function, SKP2B is expressed in founder cells, lateral root primordia and the root apical meristem. We identified a novel motif in the SKP2B promoter that is required for its specific root expression and auxin-dependent induction in the pericycle cells. Next to a transcriptional control by auxin, SKP2B expression is regulated by histone H3.1/H3.3 deposition in a CAF-dependent manner. The SKP2B promoter and the 59 end of the transcribed region are enriched in H3.3, which is associated with active chromatin states, over H3.1. Furthermore, the SKP2B promoter is also regulated by H3 acetylation in an auxin-and IAA14-dependent manner, reinforcing the idea that epigenetics represents an important regulatory mechanism during lateral root formation
Automated FISH spots counting in interphase nuclei
ABSTRACT NUMBER 197Work supported by grant CYCIT (TIC92-0922)
Evaluation of autofocus functions in molecular cytogenetic analysis
This work describes a systematic evaluation of several
autofocus functions used for analytical fluorescent image
cytometry studies of counterstained nuclei. Focusing is the
first step in the automatic fluorescence in situ hybridization
analysis of cells. Thirteen functions have been evaluated
using qualitative and quantitative procedures. For the last
of these procedures a figure-of-merit (FOM) is defined and
proposed. This new FOM takes into account five important
features of the focusing function. Our results show that
functions based on correlation measures have the best
performance for this type of image.Publicad
Predictors of mortality and poor outcome in cancer patients with E. faecium bloodstream infection
Background. To analyze predictors of mortality and
poor outcome in cancer patients diagnosed with E. faecium bloodstream infection.
Methods. Demographic, clinical and microbiological
data were collected (January 1998-June 2011).
Results. After multivariate analysis, presence of a
urinary catheter was associated with a worse 7-day
prognosis, and higher mortality at discharge. A high
Charlson index was also associated with higher 7-day
mortality.
Conclusion. Presence of a urinary catheter was associated with poor 7-day prognosis and higher mortality at
discharge in the present series.Fundamento. Analizar los predictores de mortalidad y
mal pronóstico en el paciente oncológico diagnosticado
de bacteriemia por E. faecium.
Métodos. Se analizaron datos demográficos, clínicos y
microbiológicos (Enero 1998-Junio 2011).
Resultados. El análisis multivariable demostró que la
presencia de una sonda urinaria se asoció a mal pronóstico a los 7 días y alta mortalidad del paciente al final
del estudio. Un índice de Charlson elevado se asoció a
un aumento en la mortalidad a los 7 días.
Conclusión. En nuestro estudio, la presencia de sonda
urinaria se asoció con mal pronóstico del paciente a los
7 días y aumento de la mortalidad
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