Resonant tunneling in Y(Dy)Ba2Cu3O7−δ/PrBa2Cu3−xGaxO7−δ/Y(Dy)Ba2Cu3O7−δ ramp-type Josephson junctions

We have investigated both experimentally and theoretically the normal state resistance and Josephson critical current of ramp-type Josephson junctions having YBCO (DyBCO) electrodes and 8–30 nm thick Ga-doped barriers PrBa2Cu3−xGaxO7−δ with Ga content x = 0, 0.05 and 0.1. Analysis of the data shows that the behavior of the junctions can be well described by the model assuming transport through a finite number of localized states in the barrier

Comment about UV regularization of basic commutators in string theories

Recently proposed by Hwang, Marnelius and Saltsidis zeta regularization of basic commutators in string theories is generalized to the string models with non-trivial vacuums. It is shown that implementation of this regularization implies the cancellation of dangerous terms in the commutators between Virasoro generators, which break Jacobi identity.Comment: LaTeX, 9 pages, no figures, submitted to Physics Letters

Anti-inflammatory effect of semisolid dosage forms containing capsaicin

Background: Capsaicin is alkaloid found primarily in the fruit of the Capsicum genus. Capsaicin and its analogues have been used in topical creams and patches to treat chronic pain and inflammation.Objectives: The paper deals with topical application of creams containing capsaicin to treat Freund’s adjuvant-induced inflammation.Materials and Methods: Anti-inflammatory activity was studied on the model adjuvantinduced inflammation with Freund's complete adjuvant. The study covered morphological changes in the inflamed area, the total number of white blood cells was studied by microscopic method in Gorjaev's chamber. The biochemical parameters of blood - cholinesterase activity and total number of alpha-1-acid glycoprotein in blood plasma were determined by the commercial test kits for rapid analysisResults: It was shown that the cream containing Capsicum annuum L. extract proved to be more efficient for treatment of adjuvant-induced inflammation than the commercial drug Dolgit Cream. Application of therapeutic cream with Capsicum annuum L. extract reduced activity of plasma acetylcholinesterase and total WBC count on the 15 day of treatment to initial values.Conclusion: The cream containing Capsicum annuum L. extract significantly inhibited inflammatory swelling, reduced WBC count and activity of plasma acetylcholinesterase.Keywords: capsaicin, ibuprophen, Freund’s adjuvant, inflammatio

Running anti-de Sitter radius from QCD-like strings

We consider renormalization effects for a bosonic QCD-like string, whose partons have $1/p^{2}$ propagators instead of Gaussian. Classically this model resembles (the bosonic part of) the projective light-cone (zero-radius) limit of a string on an AdS${}_5$ background, where Schwinger parameters give rise to the fifth dimension. Quantum effects generate dynamics for this dimension, producing an AdS${}_5$ background with a running radius. The projective light-cone is the high-energy limit: Holography is enforced dynamically.Comment: 12 page

Geomagnetic storm dependence on the solar flare class

Content. Solar flares are often used as precursors of geomagnetic storms. In particular, Howard and Tappin (2005) recently published in A&A a dependence between X-ray class of solar flares and Ap and Dst indexes of geomagnetic storms which contradicts to early published results. Aims. We compare published results on flare-storm dependences and discuss possible sources of the discrepancy. Methods. We analyze following sources of difference: (1) different intervals of observations, (2) different statistics and (3) different methods of event identification and comparison. Results. Our analysis shows that magnitude of geomagnetic storms is likely to be independent on X-ray class of solar flares.Comment: 3 pages, 1 tabl

The Three Loop Equation of State of QED at High Temperature

We present the three loop contribution (order $e^4$) to the pressure of massless quantum electrodynamics at nonzero temperature. The calculation is performed within the imaginary time formalism. Dimensional regularization is used to handle the usual, intermediate stage, ultraviolet and infrared singularities, and also to prevent overcounting of diagrams during resummation.Comment: ANL-HEP-PR-94-02, SPhT/94-054 (revised final version

Prospects for intranasal drug delivery systems with Ginkgo biloba in the treatment of cerebral circulatory disorders

Purpose: To analyze the range of currently available nasal medicines, and to study extant information on the use of Ginkgo biloba herbal complexes for the treatment of cerebral circulatory disorders of different etiologies. The study dwelt on the features and prospects of intranasal drug administration. Currently, intranasal administration is used primarily for the treatment of local symptoms. However, it has a much higher potential: the mucous membrane of the nasal cavity offers an opportunity for noninvasive treatment using systemic administration. Methods: The study involved the analysis of materials from information-retrieval systems, library databases, patent databases, and scientific information repositories such as e-Library. PubMed, Scopus, Google Scholar, as well as materials from the websites of manufacturers of herbal medicinal products and other herbal substances. Results: Herbal medicinal products have great potential in terms of intranasal administration. This is especially true of herbal medicines obtained through extraction of leaves of Ginkgo biloba, which have a broad spectrum of action, i.e., anti-aggregatory, venotonic, nootropic, anti-hypoxic, antioxidant, antiinflammatory, membrane-stabilizing, and capillary-protective effects. The range of Ginkgo biloba-based medicines calls for expansion, and this testifies to a good potential of these products in terms of further research and use. The analysis of literature and technical information showed the existence of a wide range of nasal medicines currently in use. However, only few drugs are used for the treatment of cerebrovascular diseases. Furthermore, there are no herbal medicines among these drugs, despite obvious advantages of herbal products such as ease of use, high bioavailability, and systemic action potential. Conclusion: The current status of research on nasal dosage forms of Ginkgo biloba herbal complexes warrants further development involving biopharmaceutical and pharmacological studies

Thermal compression of atomic hydrogen on helium surface

We describe experiments with spin-polarized atomic hydrogen gas adsorbed on liquid $^{4}$He surface. The surface gas density is increased locally by thermal compression up to $5.5\times10^{12}$ cm$^{-2}$ at 110 mK. This corresponds to the onset of quantum degeneracy with the thermal de-Broglie wavelength being 1.5 times larger than the mean interatomic spacing. The atoms were detected directly with a 129 GHz electron-spin resonance spectrometer probing both the surface and the bulk gas. This, and the simultaneous measurement of the recombination power, allowed us to make accurate studies of the adsorption isotherm and the heat removal from the adsorbed hydrogen gas. From the data, we estimate the thermal contact between 2D hydrogen gas and phonons of the helium film. We analyze the limitations of the thermal compression method and the possibility to reach the superfluid transition in 2D hydrogen gas.Comment: 20 pages, 11 figure

Localized states in 2D semiconductors doped with magnetic impurities in quantizing magnetic field

A theory of magnetic impurities in a 2D electron gas quantized by a strong magnetic field is formulated in terms of Friedel-Anderson theory of resonance impurity scattering. It is shown that this scattering results in an appearance of bound Landau states with zero angular moment between the Landau subbands. The resonance scattering is spin selective, and it results in a strong spin polarization of Landau states, as well as in a noticeable magnetic field dependence of the $g$ factor and the crystal field splitting of the impurity $d$ levels.Comment: 12 pages, 4 figures Submitted to Physical Review B This version is edited and updated in accordance with recent experimental dat

BRST approach to Lagrangian formulation for mixed-symmetry fermionic higher-spin fields

We construct a Lagrangian description of irreducible half-integer higher-spin representations of the Poincare group with the corresponding Young tableaux having two rows, on a basis of the BRST approach. Starting with a description of fermionic higher-spin fields in a flat space of any dimension in terms of an auxiliary Fock space, we realize a conversion of the initial operator constraint system (constructed with respect to the relations extracting irreducible Poincare-group representations) into a first-class constraint system. For this purpose, we find auxiliary representations of the constraint subsuperalgebra containing the subsystem of second-class constraints in terms of Verma modules. We propose a universal procedure of constructing gauge-invariant Lagrangians with reducible gauge symmetries describing the dynamics of both massless and massive fermionic fields of any spin. No off-shell constraints for the fields and gauge parameters are used from the very beginning. It is shown that the space of BRST cohomologies with a vanishing ghost number is determined only by the constraints corresponding to an irreducible Poincare-group representation. To illustrate the general construction, we obtain a Lagrangian description of fermionic fields with generalized spin (3/2,1/2) and (3/2,3/2) on a flat background containing the complete set of auxiliary fields and gauge symmetries.Comment: 41 pages, no figures, corrected typos, updated introduction, sections 5, 7.1, 7.2 with examples, conclusion with all basic results unchanged, corrected formulae (3.27), (7.138), (7.140), added dimensional reduction part with formulae (5.34)-(5.48), (7.8)-(7.10), (7.131)-(7.136), (7.143)-(7.164), added Refs. 52, 53, 54, examples for massive fields developed by 2 way