A new species of Piarosoma Hampson, 1893 (Lepidoptera, Zygaenidae, Procridinae, Artonini) from Arunachal Pradesh, India.

A new species, Piarosoma arunachalensis sp. nov., is described and illustrated based on external characters and the genitalia of two male specimens from Tale Wildlife Sanctuary, Lower Subansiri District, Arunachal Pradesh, India.

Phylogenetic position of the 'extinct' Fijian coconut moth, Levuana iridescens (Lepidoptera: Zygaenidae).

Levuana iridescens Bethune-Baker, 1906, a day-flying moth purported to be endemic to the Fijian Island of Viti Levu and a former pest of its coconut palm trees, was last observed in 1956 and has been officially declared extinct by IUCN since 1996. The controversial classical biological control method that resulted in the (presumed) demise of this moth has given this species an iconic status in biological control studies. We investigated the sister-group relationships and phylogenetic placement of this moth using NGS-obtained ancient DNA sequences from museum specimens of L.

"Ino Budensis var. Mollis" Grum-Grshimailo, 1893 (Lepidoptera: Zygaenidae) from Eastern Asia recognized as a valid species on the base of morphological and molecular analysis.

Based on morphological and molecular data, Ino budensis var. mollis Grum-Grshimailo, 1893, from China, so far treated as a synonym of Jordanita (Roccia) paupera (Christoph, 1887), is here recognized as a good species, Jordanita (Roccia) mollis (Grum-Grshimailo, 1893), stat. nov.

Karyotype reinvestigation does not confirm the presence of two cryptic species and interspecific hybridization in the () complex in the Crimea (Lepidoptera, Lycaenidae).

The karyotype of the blue butterflies from the Angarskiy Pass (Crimea), previously attributed to Polyommatus (Agrodiaetus) poseidon (Herrich-Schäffer, 1851), was re-examined. In all 19 studied individuals, we found the haploid chromosome number n = 26, including 7 pairs of relatively large and 19 pairs of relatively small chromosomes. According to the chromosome number and karyotype structure, the studied population does not differ from P.

Amplitude Higgs Mode and Admittance in Superconductors with a Moving Condensate.

We consider the amplitude (Higgs) mode in a superconductor with a condensate flow (supercurrent). We demonstrate that, in this case, the amplitude mode corresponding to oscillations δ|Δ|_{Ω}exp(iΩt) of the superconducting gap is excited by an external ac electric field E_{Ω}exp(iΩt) already in the first order in |E_{Ω}|, so that δ|Δ|_{Ω}∝(v_{0}E_{Ω}), where v_{0} is the velocity of the condensate. The frequency dependence δ|Δ|_{Ω} has a resonance shape with a maximum at Ω=2Δ.

Species-Level Para- and Polyphyly in DNA Barcode Gene Trees: Strong Operational Bias in European Lepidoptera.

The proliferation of DNA data is revolutionizing all fields of systematic research. DNA barcode sequences, now available for millions of specimens and several hundred thousand species, are increasingly used in algorithmic species delimitations. This is complicated by occasional incongruences between species and gene genealogies, as indicated by situations where conspecific individuals do not form a monophyletic cluster in a gene tree.

[Sec-butyl ester of dodecenoate: synthesis and attractive properties].

2-Butyl 2-dodecenoate has been synthesized from lauric acid and sec-butanol. The study of the biological activity of this substance has demonstrated its property as a sex attractant for males of Jordanita graeca, Jordanita globulariae and Theresimima ampellophaga (Lepidoptera: Zygaenidae, Procridinae). The latter species is the grape pest in southern Europe.

Strong quantum interference in strongly disordered bosonic insulators.

We study the variable-range hopping of bosons in an array of sites with short-range interactions and a large characteristic coordination number. The latter leads to strong quantum interference phenomena yet allows for their analytical study. We develop a functional renormalization-group scheme that repeatedly eliminates high-energy sites properly renormalizing the tunneling between the low-energy ones.

Conversion of self-assembled monolayers into nanocrystalline graphene: structure and electric transport.

Graphene-based materials have been suggested for applications ranging from nanoelectronics to nanobiotechnology. However, the realization of graphene-based technologies will require large quantities of free-standing two-dimensional (2D) carbon materials with tunable physical and chemical properties. Bottom-up approaches via molecular self-assembly have great potential to fulfill this demand.

Coulomb interaction and first-order superconductor-insulator transition.

The superconductor-insulator transition (SIT) in regular arrays of Josephson junctions is studied at low temperatures. We derived an imaginary time Ginzburg-Landau-type action properly describing the Coulomb interaction. The renormalization group analysis at zero temperature T=0 in the space dimensionality d=3 shows that the SIT is always of the first order.

Exact bosonization for an interacting fermi gas in arbitrary dimensions.

We present an exact mapping of models of interacting fermions onto boson models. The bosons correspond to collective excitations in the initial fermionic models. This bosonization is applicable in any dimension and for any interaction between fermions.

dc conductivity of an array of Josephson junctions in the insulating state.

We consider microscopically low-temperature transport in weakly disordered arrays of Josephson junctions in the Coulomb blockade regime. We demonstrate that at sufficiently low temperatures the main contribution to the dc conductivity comes from the motion of single-Cooper-pair excitations, scattered by irregularities in the array. Being proportional to the concentration of the excitations, the conductivity is exponentially small in temperature with the activation energy close to the charging energy of a Cooper pair on a superconductive island.

Hybridization of spin and plasma waves in Josephson tunnel junctions containing a ferromagnetic layer.

We study dynamics of tunnel Josephson junctions with a thin ferromagnetic layer F [superconductor-insulator-ferromagnet-superconductor (SIFS) junctions]. On the basis of derived equations relating the superconducting phase and magnetic moment to each other we analyze collective excitations in the system and find a new mode which is a hybrid of plasmalike and spin waves. The latter are coupled together in a broad range of parameters characterizing the system.

Proximity effect and its enhancement by ferromagnetism in high-temperature superconductor-ferromagnet structures.

We consider a bilayer consisting of a d-wave layered superconductor and diffusive ferromagnet with a domain wall (DW). The c axis in the superconductor and DW in the ferromagnet are assumed to be perpendicular to the interface. We demonstrate that in such a heterostructure the inhomogeneous exchange field enhances the proximity effect.

Hall resistivity of granular metals.

We calculate the Hall conductivity sigma(xy) and resistivity rho(xy) of a granular system at large tunneling conductance g(T)>>1. We show that in the absence of Coulomb interaction the Hall resistivity depends neither on the tunneling conductance nor on the intragrain disorder and is given by the classical formula rho(xy)=H/(n*ec), where n* differs from the carrier density n inside the grains by a numerical coefficient determined by the shape of the grains. The Coulomb interaction gives rise to logarithmic in temperature T correction to rho(xy) in the range Gamma less or similar T less or similar min(g(T)E(c), E(Th)), where Gamma is the tunneling escape rate, E(c) is the charging energy, and E(Th) is the Thouless energy of the grain.

Electromagnetic-field-induced suppression of transport through n-p junctions in graphene.

We study electronic transport through an n-p junction in graphene irradiated by an electromagnetic field (EF). In the absence of EF one may expect the perfect transmission of quasiparticles flowing perpendicular to the junction. We show that the resonant interaction of propagating quasiparticles with the EF induces a dynamic gap between electron and hole bands in the quasiparticle spectrum of graphene.

Quantum dots in graphene.

We suggest a way of confining quasiparticles by an external potential in a small region of a graphene strip. Transversal electron motion plays a crucial role in this confinement. Properties of thus obtained graphene quantum dots are investigated theoretically for different types of the boundary conditions at the edges of the strip.

Effect of disorder on transport in graphene.

Quenched disorder in graphene is characterized by 5 constants and experiences the logarithmic renormalization even from the spatial scales smaller than the Fermi wavelength. We derive and solve renormalization group equations (RGEs) describing the system at such scales. At larger scales, we derive a nonlinear supermatrix sigma model completely describing localization and crossovers between different ensembles.

Bosonization for disordered and chaotic systems.

Using a supersymmetry formalism, we reduce exactly the problem of electron motion in an external potential to a new supermatrix model valid at all distances. All approximate nonlinear sigma models obtained previously for disordered systems can be derived from our exact model using a coarse-graining procedure. As an example, we consider a model for a smooth disorder and demonstrate that using our approach does not lead to a "mode-locking" problem.

Transport properties of granular metals at low temperatures.

We investigate transport in a granular metallic system at large tunneling conductance between the grains, g(T)>>1. We show that at low temperatures, Tg(T)delta) behavior where conductivity is controlled by the scales of the order of the grain size. In three dimensions we predict the metal-insulator transition at the bare tunneling conductance g(C)(T)=(1/6pi)ln((E(C)/delta), where E(C) is the charging energy of a single grain.

[Complement-binding and immuno-modulating properties of polyreactive immunoglobulins].

New data concerning biological properties of polyreactive immunoglobulins (PRIG) were obtained as a result of treatment of mouse serum immunoglobulins by 4 M KSCN and are presented in the paper. In particular, the capacity of PRIG to bind C1q, the subunit of the first component of complement was studied. It was shown that PRIG's binding capacity to C1q is similar to that of intact immunoglobulins.

Odd triplet superconductivity in superconductor-ferromagnet multilayered structures.

We demonstrate that in multilayered superconductor-ferromagnet structures a noncollinear alignment of the magnetizations of different ferromagnetic layers generates a triplet superconducting condensate which is odd in frequency. This triplet condensate coexists in the superconductors with the conventional singlet one but decays very slowly in the ferromagnet, which should lead to a large Josephson effect between the superconductors separated by the ferromagnet. Depending on the mutual direction of the ferromagnetic moments, the Josephson coupling can be both of 0 and of pi type.

[Intensification of the interaction of IgG with C1q in the presence of melittin as a possible reason for anaphylaxis under the effect of bee venom].

The hydrophilic head of melittin (peptide from bee venom) has the amino acid sequence which is very close to the amino acid sequence of C1q-binding site of the IgG molecule. It was shown, that melittin caused the multiple growth of the interaction of C1q with IgG monoclonal antibody. We assume, that the appearance of melittin in blood causes the spontaneous antigen-independent aggregation of IgG and C1q with the following triggering of the classical pathway of the complement cascade and origin of C3a and C5a components.