Search results for "XL"
showing 10 items of 104 documents
A stepper motor-driven microelectrode positioner
1987
The mechanical elements and the electronic control system from a stepper motor-driven microelectrode positioner is described. The unit embodies a high-precision small step angle hybrid motor. The compact, rugged and totally concentric design of the mechanic, by a spindle mechanism achieves the necessary precision by translating the stepwise rotations of the motor into steps of linear movement. The system takes advantage of commercially available low friction parts such as ball bearings, ball bushings and axles with hardened surfaces. The related electronic control unit is designed around the most recent integrated circuitry which is both sophisticated and economical. Though the described sy…
A frequency compensation algorithm of four-wheel coherence random road
2013
Published version of an article in the journal: Mathematical Problems in Engineering. Also available from the publisher at: http://dx.doi.org/10.1155/2013/986584 Open access The road surface roughness is the main source of kinematic excitation of a moving vehicle, which has an important influence on vehicle performance. In recent decades, random road models have been widely studied, and a four-wheel random road time domain model is usually generated based on the correlation of the four-wheel input, in which a coherence function is used to describe the coherence of the road input between the left and right wheels usually. However, during our research, there are some conditions that show that…
A nonlinear dynamical approach to the path correction of multi-steering articulated vehicles
2020
When designing articulated tractor-trailer systems, engineers should take care to contrast some undesired phenomena associated with the lateral dynamics: the path off-tracking, namely the trajector...
Staurosporine-induced apoptosis in Chang liver cells is associated with down-regulation of Bcl-2 and Bcl-XL.
2004
A potent inhibitor of serine/threonine kinases, staurosporine exerts antiproliferative and apoptotic effects in many cancer cells, although the exact mechanism of its action is still unclear. This study examines the effects of staurosporine on Chang liver cells, an immortalized non-tumor cell line, in comparison with those caused in HuH-6 and HepG2 cells, two human hepatoma cell lines. Our results provide evidence that staurosporine promotes apoptosis in Chang liver cells as observed by flow cytometric analysis and acridine orange/ethidium bromide staining. The effect appeared already after 8 h of treatment and increased with treatment time and dose. After 48 h of exposure to 200 nM stauros…
Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compoun…
2010
[1] This study analyzes coccolithophore abundance fluctuations (e.g., Emiliania huxleyi, Gephyrocapsa specimens, and Florisphaera profunda) in core MD01-2444 sediment strata retrieved at the Iberian Margin, northeastern Atlantic Ocean. Coccolithophores are calcareous nannofossils, a major component of the oceanic phytoplankton, which provide information about past ecological and climatological variability. Results are supported by data on fossil organic compounds (sea surface temperatures, alkenones, and n-hexacosan-1-ol index) and geochemical analyses (benthic δ13Ccc and planktonic δ18Occ isotopes). Three scenarios are taken into account for this location at centennial-scale resolution ove…
Gillis van Coninxloo, in G. C. SCIOLLA (a cura di), Cielo terra e acque: il paesaggio nella pittura fiamminga e olandese tra Cinquecento e Seicento, …
2006
Gillis van Coninxloo, in G. C. SCIOLLA (a cura di), Cielo terra e acque: il paesaggio nella pittura fiamminga e olandese tra Cinquecento e Seicento, Torino, Elede, 2006 p. 35-133
Membrane-insertion fragments of Bcl-xL, Bax, and Bid.
2004
Apoptosis regulators of the Bcl-2 family associate with intracellular membranes from mitochondria and the endoplasmic reticulum, where they perform their function. The activity of these proteins is related to the release of apoptogenic factors, sequestered in the mitochondria, to the cytoplasm, probably through the formation of ion and/or protein transport channels. Most of these proteins contain a C-terminal putative transmembrane (TM) fragment and a pair of hydrophobic alpha helices (alpha5-alpha6) similar to the membrane insertion fragments of the ion-channel domain of diphtheria toxin and colicins. Here, we report on the membrane-insertion properties of different segments from antiapopt…
Nanoscopic hybrid systems with a polarity-controlled gate-like scaffolding for the colorimetric signalling of long-chain carboxylates
2007
Hybrid mesoporous systems containing a gate-like ensemble functionalised with imidazolium groups and a dye are used for the selective colorimetric sensing of long-chain carboxylates. Amoros del Toro, Pedro Jose, Pedro.Amoros@uv.es
Caracterización molecular de las leucemias mieloides agudas de novo
2013
La secuenciación es la técnica de elección para identificar mutaciones. Sin embargo, tiene un coste elevado, es laboriosa y su sensibilidad es limitada. Recientemente, el nuevo método de análisis de alta resolución con curvas de fusión (High Resolution Melt, HRM) permite detectar de forma rápida y específica mutaciones, polimorfismos y cambios epigenéticos. La leucemia mieloide aguda (LMA) son enfermedades heterogéneas con distintos comportamientos clínicos. El 40-50% de los pacientes no presentan alteraciones cromosómicas específicas y los mecanismos moleculares que subyacen en su patogenia son en su mayor parte desconocidos. Avances en la caracterización molecular han permitido la identif…
Alternatīvas neironu mašīntulkošanas arhitektūras
2020
Pētījuma mērķis: Izpētīt alternatīvas mašīntulkošanas arhitektūras, pielietojot jaunas pieejas, lai izveidotu angļu-latviešu tulkotāju un apvienot attēlu ar teikumu matricu vienā modelī. Nozīmīgākie rezultāti: Darba ietvaros tika uztrēnēti dažādi mašīntulkotāji. Viens balstās uz «transformer» arhitektūru. Šis modeļis uztrenēts pilnīgi no jauna. Otrs mašīntulkotājs balstās uz pretrenētiem modeliem. Darbā tika salīdzinātas dažādas pieejas un tika izvēlēts labākais pretrenēts modelis XLM-R, uz kura bāzes izveidots tulkotājs. Pirmajā tulkotājā iegūtie tulkojuma rezultāti ir pietiekami precīzi un gramatiski pareizi. Taču šis tulkotājs pielāgots politiski vai juridiski virzītam tekstam, jo uztren…