Search results for "XB"
showing 8 items of 78 documents
IFI16 expression is related to selected transcription factors during B-cell differentiation
2015
The interferon-inducible DNA sensor IFI16 is involved in the modulation of cellular survival, proliferation, and differentiation. In the hematopoietic system, IFI16 is consistently expressed in the CD34+ stem cells and in peripheral blood lymphocytes; however, little is known regarding its regulation during maturation of B- and T-cells. We explored the role of IFI16 in normal B-cell subsets by analysing its expression and relationship with the major transcription factors involved in germinal center (GC) development and plasma-cell (PC) maturation.IFI16mRNA was differentially expressed in B-cell subsets with significant decrease inIFI16mRNA in GC and PCs with respect to naïve and memory subs…
Fabricación, caracterización, modelado y propuesta de aplicabilidad de sensores magnetorresistivos de efecto túnel para medición de potencia y sensor…
2015
En el capítulo 1 se describen los fundamentos teóricos a utilizar para los análisis y estudios a realizar más adelante, así como una breve explicación del estado de la técnica que es el estado actual de la tecnología al momento de redacción de la tesis. La introducción se divide en la tecnología magnetorresistiva, definiendo qué es y los efectos magnetorresistivos que existen así como su aplicación aeroespacial y modelización fraccional. A continuación se presenta el procesamiento digital de datos y las redes de sensores tratando un poco sobre los protocolos de comunicación formatos y aplicación de la transformada digital de Fourier. En el capítulo 2 se aborda la microfabricación de los sen…
Dépenses d’enseignement dans les collèges privés et publics et indice de positionnement social : une analyse spatiale et longitudinale
2023
Introduction En France, depuis 1963, date d’instauration de la carte scolaire, l’affectation des élèves dans un collège est fonction de son lieu de résidence. Ainsi, chaque élève est affecté à un collège public à proximité de son domicile. Par essence, cette méthode d’affectation reproduit au sein des collèges la ségrégation résidentielle. La possibilité d’obtenir des dérogations à cette affectation administrative, l’assouplissement de la carte scolaire de 2007, et la liberté de scolariser so...
Endoderm development requires centrioles to restrain p53-mediated apoptosis in the absence of ERK activity
2021
Centrioles comprise the heart of centrosomes, microtubule-organizing centers. To study the function of centrioles in lung and gut development, we genetically disrupted centrioles throughout the mouse endoderm. Surprisingly, removing centrioles from the endoderm did not disrupt intestinal growth or development but blocked lung branching. In the lung, acentriolar SOX2-expressing airway epithelial cells apoptosed. Loss of centrioles activated p53, and removing p53 restored survival of SOX2-expressing cells, lung branching, and mouse viability. To investigate how endodermal p53 activation specifically killed acentriolar SOX2-expressing cells, we assessed ERK, a prosurvival cue. ERK was active t…
Study of Zumba game playing experience, related to previous knowledge of Zumba
2014
The focus of this research is to make an analysis of the experiences of Xbox Kinect Zumba game players in correlation to the real Zumba classes. Through the observation of the Zumba game, specifically using the Xbox Kinect motion detection technology, the researcher intends to create a user experience similar to the real classroom experience and/or create a situation pleasant enough to interest the subjects in real Zumba classes or further game playing, despite of their preconceptions about the game/activity. Negative results will be used to pinpoint what is lacking in this situation and environment to achieve the level of comfort and enjoyment required. The researcher intends to show that …
Genetic variability of the blue and red shrimp Aristeus antennatus in the Western Mediterranean Sea inferred by DNA microsatellite loci
2012
Genetic variation at eight microsatellite loci was studied in nine populations of the blue and red shrimp Aristeus antennatus to investigate whether distinct stocks are present in the Western Mediterranean Sea. A high level of gene flow and no evidence of genetic partitioning were discovered. No significant variation was found (FST = 0.00673, P-value = 0.067) even when shrimps from exploited and those from deep-water unexploited grounds were compared. No evidence of reduction or expansion of population size in the recent past was found, as indicated by the bottleneck and interlocus g-tests. Our results are consistent with previous studies using mitochondrial gene methods and allozymes, indi…
Spectral analysis of the dipping LMXB system XB 1916-053
2019
Context: XB 1916-053 is a low mass X-ray binary system (LMXB) hosting a neutron star (NS) and showing periodic dips. The spectrum of the persistent emission was modeled with a blackbody component having a temperature between 1.31 and 1.67 keV and with a Comptonization component with an electron temperature of 9.4 keV and a photon index $\Gamma$ between 2.5 and 2.9. The presence of absorption features associated with highly ionized elements suggested the presence of partially ionized plasma in the system. Aims: In this work we performed a study of the spectrum of XB 1916-053, which aims to shed light on the nature of the seed photons that contribute to the Comptonization component. Methods: …
Evidence of a non-conservative mass transfer in the ultra-compact X-ray source XB 1916-053
2020
The dipping source XB 1916-053 is a compact binary system with an orbital period of 50 min harboring a neutron star. Using ten new {\it Chandra} observations and one {\it Swift/XRT} observation, we are able to extend the baseline of the orbital ephemeris; this allows us to exclude some models that explain the dip arrival times. The Chandra observations provide a good plasma diagnostic of the ionized absorber and allow us to determine whether it is placed at the outer rim of the accretion disk or closer to the compact object. From the available observations we are able to obtain three new dip arrival times extending the baseline of the orbital ephemeris from 37 to 40 years. From the analysis…