62 research outputs found
Enhancement of antiferromagnetic correlations below superconducting transition temperature in bilayer superconductors
Motivated by the recent experiment in multilayered cuprate superconductors
reporting the enhancement of antiferromagnetic order below the superconducting
transition temperature, we study the proximity effect of the antiferromagnetic
correlation in a bilayer system and also examine the possibility of a
coexistence of antiferromagnetic order and superconductivity. We present the
result of mean field theory that is consistent with the experiment and supports
the proximity effect picture.Comment: 7 pages, 6 figures, added Fig.6, some comments, and reference
Induced Order in Nonequivalent Two-Leg Hubbard Ladder
Motivated by the presence of different orders in multilayered
high-temperature superconductors, we examine a model consisting of
nonequivalent two Hubbard chains coupled by interchain hopping by using the
density-matrix renormalization group (DMRG) and a mean-field theory. As an
example, we consider a system with noninteracting chain without order and a
Hubbard chain with strong spin-density-wave correlation. We find that the
magnitude of the interchain hopping controls the strength of induced order as
well as that of original order and its fluctuation. It is also found that the
induced order decreases with increasing the magnitude of the original order.
Implications to the multilayered system are discussed.Comment: 9 page
Relationships between Cytokine Profiles and Signaling Pathways (IκB Kinase and p38 MAPK) in Parainfluenza Virus-Infected Lung Fibroblasts
Respiratory viruses such as parainfluenza virus (PIV) in individuals with certain genetic predispositions in early life are associated with the induction of wheezing, which can progress to the development of asthma. It has been suggested that aberrant production of various cytokines due to viral infection are associated with virus-induced asthma. However, the mechanisms of how respiratory viruses induce and exacerbate asthma have yet to be clarified. To examine cytokine responses to PIV infection, we assessed 27 cytokine levels released from PIV-infected human fetal lung fibroblasts. In addition, we examined relationships between these cytokine responses and signaling pathways (IκB kinase and p38 MAPK) in PIV-infected cells. At 24 h after infection, PIV-infected cells significantly released a number of cytokines, namely, proinflammatory cytokines [interleukins (IL)-1β, IL-6, and tumor necrosis factor-α], anti-inflammatory cytokine (IL-1ra), Th1 cytokines (interferon-γ, and IL-2), Th2 cytokines (IL-4, IL-5, and IL-10), granulopoiesis-inducing cytokines (granulocyte colony-stimulating factor and granulocyte–macrophage colony-stimulating factor), neutrophil recruitment-inducing cytokines (IL-8 and interferon-inducible protein-10), and eosinophil recruitment-inducing cytokines (eotaxin and regulated on activation normal T-cell expressed and secreted). PIV infection enhanced phosphorylation of both IκB and p38 MAPK, but not Akt, in the cells. Signaling pathway inhibitors, BMS-345541 (a specific IκB kinase inhibitor) and SB203580 (a specific p38 MAPK inhibitor), significantly suppressed release of these cytokines from PIV-infected cells. The results indicate that PIV infection induces aberrant production and release of various cytokines through IκB kinase and p38 MAPK pathways in human lung fibroblasts. Overproduction and imbalance of these cytokines may be partially associated with the pathophysiology of virus-induced asthma
Measurements of anisotropic scintillation efficiency for carbon recoils in a stilbene crystal for dark matter detection
It is known that scintillation efficiency of organic single crystals depends
on the direction of nuclear recoils relative to crystallographic axes. This
property could be applied to the directional WIMP dark matter detector.
The scintillation efficiency of carbon recoils in a stilbene crystal was
measured for recoil energies of 30 keV to 1 MeV using neutrons from
Li(p,n)Be and Cf. Anisotropic response was confirmed in low
energy regions. The variation of the scintillation efficiency was about 7 %,
that could detect the possible dark matter signal.Comment: 12 pages, 6 figures, to be published in Physics Letters
Seasonal variations of NO observed with a microwave radiometer at Syowa Station
第3回極域科学シンポジウム 横断セッション「中層大気・熱圏」 11月26日(月) 国立極地研究所 2階大会議
2015年の昭和基地でのNOおよびオゾンの地上ミリ波モニタリング観測
第6回極域科学シンポジウム分野横断型セッション:[IM] 横断 中層大気・熱圏11月17日(火) 国立極地研究所1階交流アトリウ
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