71 research outputs found
Mercado interno de Uluses Árticos de Sakha (Yakutia) en el Área Macro del Distrito Federal del Lejano Oriente
This study reviews and compares the market potential of two macro-areas in the Republic of Sakha (Yakutia) in the AZRF (Arctic zone of the Russian Federation) and the FEFD (Far Eastern Federal District. Moreover, this work shows that a significant part of supply and demand in municipalities' domestic markets is concentrated in the FEFD. Until recently, the AZRF and the FEFD were not considered by the State as a single government body. Transferred powers to the Ministry of the Russian Federation for the development of the Far East and the Arctic has allowed the territory of the Arctic uluses of the Republic of Sakha (Yakutia) to be included in the social and economic development of the FEFD.Este estudio revisa y compara el potencial de mercado de dos macro áreas en la República de Sakha (Yakutia) en la AZRF (zona ártica de la Federación de Rusia) y el FEFD (Distrito Federal del Lejano Oriente. Además, este trabajo muestra que una parte significativa de la oferta y la demanda en los mercados internos de los municipios se concentra en el FEFD. Hasta hace poco, el Estado no consideraba al AZRF y al FEFD como un solo organismo gubernamental. Se transfirieron competencias al Ministerio de la Federación de Rusia para el desarrollo de la El Lejano Oriente y el Ártico han permitido que el territorio de los uluses árticos de la República de Sakha (Yakutia) se incluya en el desarrollo social y económico del FEFD
Mercado interno de Uluses Árticos de Sakha (Yakutia) en el Área Macro del Distrito Federal del Lejano Oriente
Este estudio revisa y compara el potencial de mercado de dos macro áreas en la República de Sakha (Yakutia) en la AZRF (zona ártica de la Federación de Rusia) y el FEFD (Distrito Federal del Lejano Oriente. Además, este trabajo muestra que una parte significativa de la oferta y la demanda en los mercados internos de los municipios seconcentra en el FEFD. Hasta hace poco, el Estado no consideraba al AZRF y al FEFD como un solo organismo gubernamental. Se transfirieron competencias al Ministerio de la Federación de Rusia para el desarrollo de la El Lejano Oriente y el Ártico han permitido que el territorio de los uluses árticos de la República de Sakha (Yakutia) se incluya en el desarrollo social y económico del FEF
Spin-Photovoltaic Effect in Quantum Wires Due to Intersubband Transitions
We consider the current induced in a quantum wire by external electromagnetic radiation. The photocurrent is caused by the interplay of spin-orbit interaction (Rashba and Dresselhaus terms) and an external in-plane magnetic field. We calculate this current using a Wigner functions approach, taking into account radiation-induced transitions between transverse subbands. The magnitude and the direction of the current depends on the Dresselhaus and Rashba constants, strength of magnetic field, radiation frequency, and intensity. The current can be controlled by changing some of these parameters
Skew scattering in dilute ferromagnetic alloys
The challenging problem of skew scattering for Hall effects in dilute
ferromagnetic alloys, with intertwined effects of spin-orbit coupling,
magnetism and impurity scattering, is studied here from first principles. Our
main aim is to identify chemical trends and work out simple rules for large
skew scattering in terms of the impurity and host states at the Fermi surface,
with particular emphasis on the interplay of the spin and anomalous Hall
effects in one and the same system. The predicted trends are benchmarked by
referring to three different \emph{ab initio} methods based on different
approximations with respect to the electronic structure and transport
properties.Comment: 5 pages, 4 figure
Functional Profiling Reveals Critical Role for miRNA in Differentiation of Human Mesenchymal Stem Cells
BACKGROUND:Mesenchymal stem (MS) cells are excellent candidates for cell-based therapeutic strategies to regenerate injured tissue. Although human MS cells can be isolated from bone marrow and directed to differentiate by means of an osteogenic pathway, the regulation of cell-fate determination is not well understood. Recent reports identify critical roles for microRNAs (miRNAs), regulators of gene expression either by inhibiting the translation or by stimulating the degradation of target mRNAs. METHODOLOGY/PRINCIPAL FINDINGS:In this study, we employed a library of miRNA inhibitors to evaluate the role of miRNAs in early osteogenic differentiation of human MS cells. We discovered that miR-148b, -27a and -489 are essential for the regulation of osteogenesis: miR-27a and miR-489 down-regulate while miR-148b up-regulates differentiation. Modulation of these miRNAs induced osteogenesis in the absence of other external differentiation cues and restored osteogenic potential in high passage number human MS cells. CONCLUSIONS/SIGNIFICANCE:Overall, we have demonstrated the utility of the functional profiling strategy for unraveling complex miRNA pathways. Our findings indicate that miRNAs regulate early osteogenic differentiation in human MS cells: miR-148b, -27a, and -489 were found to play a critical role in osteogenesis
Aurintricarboxylic Acid is a Canonical Disruptor of the TAZ-TEAD Transcriptional Complex
Disrupting the formation of the oncogenic YAP/TAZ-TEAD transcriptional complex holds substantial therapeutic potential. However, the three protein interaction interfaces of this complex cannot be easily disrupted using small molecules. Here, we report that the pharmacologically active small molecule aurintricarboxylic acid (ATA) acts as a disruptor of the TAZ-TEAD complex. ATA was identified in a high-throughput screen using a TAZ-TEAD AlphaLISA assay that was tailored to identify disruptors of this transcriptional complex. We further used fluorescence polarization assays both to confirm disruption of the TAZ-TEAD complex and to demonstrate that ATA binds to interface 3. We have previously shown that cell-based models that express the oncogenic TAZ-CAMTA1 (TC) fusion protein display enhanced TEAD transcriptional activity because TC functions as an activated form of TAZ. Utilizing cell-based studies and our TC model system, we performed TC/TEAD reporter, RNA-Seq, and qPCR assays and found that ATA inhibits TC/TEAD transcriptional activity. Further, disruption of TC/TEAD and TAZ/TEAD interaction by ATA abrogated anchorage-independent growth, the phenotype most closely linked to dysregulated TAZ/TEAD activity. Therefore, this study demonstrates that ATA is a novel small molecule that has the ability to disrupt the undruggable TAZ-TEAD interface
Kinome-Wide Functional Genomics Screen Reveals a Novel Mechanism of TNFα-Induced Nuclear Accumulation of the HIF-1α Transcription Factor in Cancer Cells
Hypoxia-inducible factor-1 (HIF-1) and its most important subunit, HIF-1α, plays a central role in tumor progression by regulating genes involved in cancer cell survival, proliferation and metastasis. HIF-1α activity is associated with nuclear accumulation of the transcription factor and regulated by several mechanisms including modulation of protein stability and degradation. Among recent advances are the discoveries that inflammation-induced cytokines and growth factors affect protein accumulation of HIF-1α under normoxia conditions. TNFα, a major pro-inflammatory cytokine that promotes tumorigenesis is known as a stimulator of HIF-1α activity. To improve our understanding of TNFα-mediated regulation of HIF-1α nuclear accumulation we screened a kinase-specific siRNA library using a cell imaging–based HIF-1α-eGFP chimera reporter assay. Interestingly, this systematic analysis determined that depletion of kinases involved in conventional TNFα signaling (IKK/NFκB and JNK pathways) has no detrimental effect on HIF-1α accumulation. On the other hand, depletion of PRKAR2B, ADCK2, TRPM7, and TRIB2 significantly decreases the effect of TNFα on HIF-1α stability in osteosarcoma and prostate cancer cell lines. These newly discovered regulators conveyed their activity through a non-conventional RELB-depended NFκB signaling pathway and regulation of superoxide activity. Taken together our data allow us to conclude that TNFα uses a distinct and complex signaling mechanism to induce accumulation of HIF-1α in cancer cells. In summary, our results illuminate a novel mechanism through which cancer initiation and progression may be promoted by inflammatory cytokines, highlighting new potential avenues for fighting this disease
Quantum bits with Josephson junctions
Already in the first edition of this book (Barone and Paterno, "Fundamentals
and Physics and Applications of the Josephson Effect", Wiley 1982), a great
number of interesting and important applications for Josephson junctions were
discussed. In the decades that have passed since then, several new applications
have emerged. This chapter treats one such new class of applications: quantum
optics and quantum information processing (QIP) based on superconducting
circuits with Josephson junctions. In this chapter, we aim to explain the
basics of superconducting quantum circuits with Josephson junctions and
demonstrate how these systems open up new prospects, both for QIP and for the
study of quantum optics and atomic physics.Comment: 30 pages, 10 figures. Book chapter for a new edition of Barone and
Paterno's "Fundamentals and Physics and Applications of the Josephson
Effect". Final versio
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