Search results for "H2"

Production of photon states from Λ-atoms in a cavity

2019

We analyse the system of Λ-atoms in a cavity QED of semi-transparent mirror and driven by laser fields. We derive effective models and connect concepts (photonic flux, input-output operators, photonic state) characterizing the propagation of the resulting leaking photons. We propose an atom-cavity non-resonant scheme for single-and 2-photons generation. The pulse shapes of outgoing single photons are tailored using a specifically designed driving field envelope. For the production of 2-photon states, two trapped atoms are used with two driving pulses. Their pulse shapes are characterized and it is shown that the multiphoton outgoing photonic states cannot be Fock states, since the photons a…

Etude de NLRP3 dans les cellules myéloïdes immunosuppressives et les lymphocytes TCD4 dans un contexte de cancer

2013

The inflammasome NLRP3 (NOD like receptor pyd containing 3) is a multiprotein complex notably responsible for IL-1β (interleukine-1β) production, an inflammatory cytokine. Negative effects have been observed in various diseases including cancer. My thesis focuses on the effects of NLRP3 in cancer.In my first project, I studied the NLRP3 inflammasome activation in MDSC (myeloïd derived suppressor cells) after a chemotherapy treatment. Two chemotherapies, 5-Fluorouracil and Gemcitabine, are selectively able to kill MDSC, an immunosuppressive population growing during cancer evolution. MDSC’s death restores anti-tumor immunity for a while but another immunosuppressive population is established…

Impact of environmental factors on grapevine physiology and responsiveness to elicitor-induced resistance against Plasmopara viticola

2012

Image analysis methods for assessment of H2O2 production and Plasmopara viticola development in grapevine leaves: application to the evaluation of re…

2014

Functional characterization of the sea urchin sns chromatin insulator in erythroid cells.

2005

Abstract Chromatin insulators are regulatory elements that determine domains of genetic functions. We have previously described the characterization of a 265 bp insulator element, termed sns, localized at the 3′ end of the early histone H2A gene of the sea urchin Paracentrotus lividus. This sequence contains three cis-acting elements (Box A, Box B, and Box C + T) all needed for the enhancer-blocking activity in both sea urchin and human cells. The goal of this study was to further characterize the sea urchin sns insulator in the erythroid environment. We employed colony assays in human (K562) and mouse (MEL) erythroid cell lines. We tested the capability of sns to interfere with the communi…

The organization, localization and nucleotide sequence of the histone genes of the midge Chironomus thummi.

1991

Several histone gene repeating units containing the genes for histones H1, H2A, H2B, H3 and H4 were isolated by screening a genomic DNA library from the midge Chironomus thummi ssp. thummi. The nucleotide sequence of one complete histone gene repeating unit was determined. This repeating unit contains one copy of each of the five histone genes in the order and orientation mean value of H3 H4 mean value of H2A H2B H1 mean value of. The overall length is 6262 bp. The orientation, nucleotide sequence and inferred amino acid sequence as well as the chromosomal arrangement and localization are different from those reported for Drosophila melanogaster. The codon usage also shows marked difference…

Cabut, a C2H2 zinc finger transcription factor, is required during Drosophila dorsal closure downstream of JNK signaling.

2005

AbstractDuring dorsal closure, the lateral epithelia on each side of the embryo migrate dorsally over the amnioserosa and fuse at the dorsal midline. Detailed genetic studies have revealed that many molecules are involved in this epithelial sheet movement, either with a signaling function or as structural or motor components of the process. Here, we report the characterization of cabut (cbt), a new Drosophila gene involved in dorsal closure. cbt is expressed in the yolk sac nuclei and in the lateral epidermis. The Cbt protein contains three C2H2-type zinc fingers and a serine-rich domain, suggesting that it functions as a transcription factor. cbt mutants die as embryos with dorsal closure …

Functional characterization of the enhancer blocking element of the sea urchin early histone gene cluster reveals insulator properties and three esse…

2000

Insulator elements can be functionally identified by their ability to shield promoters from regulators in a position-dependent manner or their ability to protect adjacent transgenes from position effects. We have previously reported the identification of a 265 bp sns DNA fragment at the 3' end of the sea urchin H2A early histone gene that blocked expression of a reporter gene in transgenic embryos when placed between the enhancer and the promoter. Here we show that sns interferes with enhancer-promoter interaction in a directional manner. When sns is placed between the H2A modulator and the inducible tet operator, the modulator is barred from interaction with the basal promoter. However, th…

Recepšu medikamentu, kas inhibē kuņģa skābes sekrēciju, aprite par 2015. gadu "Jelgavas Lielā aptiekā"

2016

Pieauguša cilvēka organisms katru dienu spēj producēt aptuveni 1litru kuņģa skābes. Ja saražotais skābes daudzums pārsniedz fizioloģisku normu, tad sākas traucējumi kuņģa darbībā, kur attīstās dažādas slimības. Patoloģiskās novirzes skābes producēšanā, var būt saistītas ar dažādiem faktoriem, kā piemēram, nepareizs un neregulārs uzturs, smēķēšana un alkohola lietošana, nesteroīdo pretiekaisuma līdzekļu (NSPL) lietošana, ilgstošs sterss un citi. Bet skābes hipersekēcija var būt saistīta arī ar gremošanas sistēmas slīmībām, īpaši , ja simptomi parādās bieži un ilgstoši. Vairāku gadu laikā zināmi līdzekļi kuri palīdz cilvēkiem cīnīties ar nepatīkamiem simptomiem; tie vērsti kā uz simptomu mazi…

New Polylactic Acid Composites Reinforced with Artichoke Fibers

2015

In this work, artichoke fibers were used for the first time to prepare poly(lactic acid) (PLA)-based biocomposites. In particular, two PLA/artichoke composites with the same fiber loading (10% w/w) were prepared by the film-stacking method: the first one (UNID) reinforced with unidirectional long artichoke fibers, the second one (RANDOM) reinforced by randomly-oriented long artichoke fibers. Both composites were mechanically characterized in tensile mode by quasi-static and dynamic mechanical tests. The morphology of the fracture surfaces was analyzed through scanning electron microscopy (SEM). Moreover, a theoretical model, i.e., Hill's method, was used to fit the experimental Young's modu…