235 research outputs found
Black-billed Whistling Duck
This is where the abstract of this record would appear. This is only demonstration data
Black-billed Whistling Duck
This is where the abstract of this record would appear. This is only demonstration data
Anomalous Enhancement of the Superconducting Transition Temperature in Electron-Doped Cuprate Heterostructures
The superconducting transition temperature of multilayers of
electron-doped cuprates, composed of underdoped (or undoped) and overdoped La%
CeCuO (LCCO) and PrCeCuO (PCCO) thin
films, is found to increase significantly with respect to the of the
corresponding single-phase films. By investigating the critical current density
of superlattices with different doping levels and layer thicknesses, we find
that the enhancement is caused by a redistribution of charge over an
anomalously large distance.Comment: 4 figures. To appear in PRB as a Rapid Communicatio
Probing the surface states in Bi2Se3 using the Shubnikov-de Haas effect
Shubnikov-de Haas (SdH) oscillations are observed in Bi2Se3 flakes with high
carrier concentration and low bulk mobility. These oscillations probe the
protected surface states and enable us to extract their carrier concentration,
effective mass and Dingle temperature. The Fermi momentum obtained is in
agreement with angle resolved photoemission spectroscopy (ARPES) measurements
performed on crystals from the same batch. We study the behavior of the Berry
phase as a function of magnetic field. The standard theoretical considerations
fail to explain the observed behavior.Comment: 6 pages, 8 figures. Accepted to Physical Review
The Persistence Length of a Strongly Charged, Rod-like, Polyelectrolyte in the Presence of Salt
The persistence length of a single, intrinsically rigid polyelectrolyte
chain, above the Manning condensation threshold is investigated theoretically
in presence of added salt. Using a loop expansion method, the partition
function is consistently calculated, taking into account corrections to
mean-field theory. Within a mean-field approximation, the well-known results of
Odijk, Skolnick and Fixman are reproduced. Beyond mean-field, it is found that
density correlations between counterions and thermal fluctuations reduce the
stiffness of the chain, indicating an effective attraction between monomers for
highly charged chains and multivalent counterions. This attraction results in a
possible mechanical instability (collapse), alluding to the phenomenon of DNA
condensation. In addition, we find that more counterions condense on slightly
bent conformations of the chain than predicted by the Manning model for the
case of an infinite cylinder. Finally, our results are compared with previous
models and experiments.Comment: 13 pages, 2 ps figure
One-Year Treatment With Exenatide Improves β-Cell Function, Compared With Insulin Glargine, in Metformin-Treated Type 2 Diabetic Patients: A randomized, controlled trial
0.0001). beta-Cell function measures returned to pretreatment values in both groups after a 4-week off-drug period. A1C and body weight rose to pretreatment values 12 weeks after discontinuation of either exenatide or insulin glargine therapy. CONCLUSIONS: Exenatide significantly improves beta-cell function during 1 year of treatment compared with titrated insulin glargine. After cessation of both exenatide and insulin glargine therapy, beta-cell function and glycemic control returned to pretreatment values, suggesting that ongoing treatment is necessary to maintain the beneficial effects of either therap
Pre-asthma : a useful concept for prevention and disease-modification? A EUFOREA paper. Part 1—allergic asthma
Funding The author(s) declare that no financial support was received for the research, authorship, and/or publication of this article.Peer reviewedPublisher PD
Manifestation of palmoplantar pustulosis during or after infliximab therapy for plaque-type psoriasis: report on five cases
Infliximab is a monoclonal antibody directed against TNF-α. It has been approved for use in rheumatoid arthritis, ankylosing spondylitis, inflammatory bowel disease, psoriatic arthritis and plaque-type psoriasis. In case reports, positive effects on pustular variants of psoriasis have also been reported. However, paradoxically, manifestation of pustular psoriasis and plaque-type psoriasis has been reported in patients treated with TNF antagonists including infliximab for other indications. Here, we report on 5 patients with chronic plaque-type psoriasis who developed palmoplantar pustulosis during or after discontinuation of infliximab therapy. In two of the five cases, manifestation of palmoplantar pustulosis was not accompanied by worsening of plaque-type psoriasis. Possibly, site-specific factors or a differential contribution of immunological processes modulated by TNF inhibitors to palmoplantar pustulosis and plaque-type psoriasis may have played a role
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