Salicylate or phthalate: the main intermediates in the bacterial degradation of naphthalene

Pathways of naphthalene degradation, the key enzymes, and genetic regulation are the main subjects of the present review, representing an attempt to summarize the current knowledge about the mechanism of the microbial degradation of PAH

Biotechnological potential of fungi and bacteria with ligninolytic activity (mini-review)

The presented mini-review gives a general idea of oxidative enzymes of fungi and bacteria. Possible directions of their practical application are show

Soil bacteria as a basis for sustainable development of the environment

The aim of this work was to isolate aerobic microorganisms from soil samples of two types - forest, without technogenic history, and agro-industrial, and to evaluate their propertie

Terahertz spectroscopy of electromagnons in Eu_{1-x}Y_xMnO_3

Dielectric permittivity spectra of yttrium-doped EuMnO$_3$ in the composition range 0 =< x =< 0.5 have been investigated in the terahertz frequency range. Magnetoelectric contributions to the permittivity were observed in all compositions for ac electric fields parallel to the crystallographic a-axis. Well defined electromagnons exist for x >= 0.2 close to \nu ~ 20 cm^{-1} and with dielectric strength strongly increasing on doping. In addition to electromagnons, a broad contribution of magnetoelectric origin is observed for all compositions. For Eu_{0.8}Y_{0.2}MnO_3 the electromagnons can be suppressed by external magnetic fields which induce a canted antiferromagnetic phase. Magnetoelectric effects in the different doping regimes are discussed in detail.Comment: 7 pages, 9 figures include

Анализ эффективности очистки HEX-олигонуклеотидов, полученных с использованием модифицированного метода деблокирования

A new way of deblocking of synthetic hexachlorofluorescein-oligodeoxyribonucleotides (HEX-ODN) prevents the modification of the label and the accumulation of difficult to separated by-product. It was shown that this method increases the efficiency of purification HEX-ON and the sensitivity of DNA diagnostics.Новый способ деблокирования синтетических гексахлорфлуоресцеин-олигодезоксирибонук-леотидов (HEX-ODN) препятствует модификации метки и накоплению трудно отделяемого побочного продукта. Показано, что его применение увеличивает эффективность очистки HEX-ODN и чувствительность ДНК-диагностики

Making linearizability compositional for partially ordered executions

In the interleaving model of concurrency, where events are totally ordered, linearizability is compositional: the composition of two linearizable objects is guaranteed to be linearizable. However, linearizability is not compositional when events are only partially ordered, as in the weak-memory models that describe multicore memory systems. In this paper, we present a generalisation of linearizability for concurrent objects implemented in weak-memory models. We abstract from the details of specific memory models by defining our condition using Lamport’s execution structures. We apply our condition to the C11 memory model, providing a correctness condition for C11 objects. We develop a proof method for verifying objects implemented in C11 and related models. Our method is an adaptation of simulation-based methods, but in contrast to other such methods, it does not require that the implementation totally orders its events. We apply our proof technique and show correctness of the Treiber stack that blocks on empty, annotated with C11 release-acquire synchronisation

Double-polarization antenna for MIMO system of wireless communication

A new type of flat quadrifilar spiral antenna is proposed for use in modern wireless MIMO systems. The developed antenna has compact dimensions and operates in a wide frequency range that fully covers the WiFi (2.4-2.4835 GHz) range. The problem of excitation of the proposed quadrifilar spiral antenna is solved with the help of the balancing and matching device introduced in the report.Efficiency of the antenna is proved by experiment that compares the real throughput of the wireless information system to the one using two standard “rubber duck” antennas

IMECE01-2612 Exact Closure Procedures of Hierarchical VAT Capillary Thermo-Convective Problem for Turbulent and Laminar Regimes

ABSTRACT Volume Averaging Theory (VAT), an effective and rigorous approach for study of transport (laminar and turbulent) phenomena, is used to model flow and heat transfer in porous media. The modeling is based on a simple pore level network. The primary difficulties in applying VAT to straight capillary networks, the many unknown integral and differential terms that are needed for closure, are overcome. VAT based modeling of pore level transport in straight capillaries results in two sets of scale governing equations. One scale is the upper scale VAT equations which describe ensemble properties for flow and heat transfer in porous media. The other scale is the lower scale laminar and turbulent transport equations that represent flow and heat transport in each straight pore capillary. It is how the unknown VAT terms in the upper scale equations can be estimated using the relationships between upper scale properties and lower scale properties. Exact closures and mathematical procedures are developed for the turbulent regime, extending the previous laminar regime work. Numerical results for turbulent and laminar transport in straight capillary porous media are shown in this paper

Analysis of efficiency of purification of HEX-oligonucleotides obtained by modified deblocking

A new way of deblocking of synthetic hexachlorofluorescein-oligodeoxyribonucleotides (HEX-ODN) prevents the modification of the label and the accumulation of difficult to separated by-product. It was shown that this method increases the efficiency of purification HEX-ON and the sensitivity of DNA diagnostics