Magnetotransport of coupled electron-holes

The carriers in InAs-GaSb double quantum wells are hybrid ``electron-holes''. We study the magnetotransport properties of such particles using a two-component Keldysh technique, which results in a semi-analytic expression for the small-field current. We show that zero temperature current can be large even when the Fermi energy lies within the hybridization gap, a result which cannot be understood within a semiclassical (Boltzmann) approach. Magnetic field dependence of the conductance is also affected significantly by the hybridization of electrons and holes.Comment: 4 pages, 2 figure

Triboelectric Backgrounds to radio-based UHE Neutrino Exeperiments

The triboelectric effect broadly includes any process in which force applied at a boundary layer results in displacement of surface charge, leading to the generation of an electrostatic potential. Wind blowing over granular surfaces, such as snow, can induce a potential difference, with subsequent coronal discharge. Nanosecond timescale discharges can lead to radio-frequency emissions with characteristics similar to piezoelectric-induced discharges. For Antarctic-sited experiments seeking detection of radio-frequency signals generated by collisions of cosmic rays or neutrinos with atmospheric or englacial molecular targets, triboelectric emissions from the surface pose a potential background. This is particularly true for experiments in which radio antennas are buried ~(1--100) m below the snow surface, and seeking to validate neutrino detection strategies by measurement of down-coming radio-frequency emissions from extensive air showers. Herein, after summarizing extant evidence for wind-induced triboelectric effects previously reported elsewhere, we detail additional analysis using archival data collected with the RICE and AURA experiments at the South Pole. We broadly characterize those radio-frequency emissions based on source location, and time-domain and also frequency-domain characteristics. We find that: a) For wind velocities in excess of 10-12 m/s, triboelectric background triggers can dominate data-taking, b) frequency spectra for triboelectric events are generally shifted to the low-end of the regime to which current radio experiments are typically sensitive (100-200 MHz), c) there is an apparent preference for tribo-electric discharges from metal surface structures, consistent with a model in which localized, above-surface structures provide a repository for transported charge

Power spectrum features of the near-Earth atmospheric electric field in Kamchatka

Power spectrum of the diurnal variations of the quasi-electrostatic field Ez in the near-Earth atmosphere have been presented for the first time. The Ez power spectrum variations in the period of fine weather have been shown to exhibit two bands of the periods of natural atmospheric oscillations with T = 1-5 and 6-24 h. These oscillations are the modes of the internal gravity and tidal waves in the lower atmosphere. On the days under atmospheric precipitation, the spectral power of Ez increases by an order of magnitude. During the pre-earthquake period, when the diurnal Ez variation had an anomaly, the intensity of harmonics with T = 1.8, 2.2, and 3.8 h increased by an order of magnitude or more in comparison with the Ez spectra in fine weather. Two additional spectral bands with T = 0.6 and 1 h have appeared simultaneously

Representation of Game Phrase-Making Mechanisms in Educational Dictionary: Practical Lexicography

The practical experience of the vocabulary representation of the mechanisms of game phraseology is described, the difficulties of lexicography of phraseological units built on the game paradox are listed, the ways to solve the problem of etymologization of phraseological games in the educational dictionary are showed. The main positions of the innovative technology for constructing educational phraseological dictionaries in paper format are presented. The relevance of the research is due to the great developmental impact of phraseological games on the addressee-child and the need to improve the system of their lexicographic description for educational purposes. The novelty of the research lies in the appeal to the unexplored problematic of describing phraseological games and the development of a technique for etymological paraphrasing, including interpretive and plot-compositional techniques, which are implemented in a twolevel configurative structure of etymological paraphrase. Special attention is paid to lexicographic techniques that allow revealing the specifics of phraseological games built on false imagery, as well as phraseological games, the content plan of which is not opposed to the expression plan, and their actual meaning is logically justified and motivated. Examples of dictionary entries of new phraseographic projects of the Experimental Laboratory of Educational Lexicography of Pskov University are given — a quest dictionary and a phraseological puzzle dictionary, the genres of which adequately reveal the specifics of phraseological games

“CVCACS” MODEL FOR PREDICTION OF CARDIOVASCULAR COMPLICATIONS IN HOSPITALIZED PATIENTS WITH ACUTE CORONARY SYNDROME

Sixty-eight patients with acute coronary syndrome (ACS) were studied for correlations between the levels of interleukin IL-6 and IL-10 in blood and saliva, highly sensitive C-reactive protein (hs-CRP) and brain natriuretic peptide (NtproBNP) in the blood serum with the development of cardiovascular complications (CVC) during hospital period of the disease. It has been revealed that the patients with CVC had higher concentration of IL-6 in blood, IL-6, IL-10 in saliva, hs-CRP and NtproBNP in blood samples. Meanwhile, excess of IL-6 levels in saliva over those in blood was a significant predictor of CVC development. In order to facilitate the prediction values of CVC during ACS hospital period we have proposed a “CVCACS” model that employed the parameters of patient’s age, IL-10 level in the saliva, IL-6, and hs-CRP amounts in blood. It should be mentioned that the variable value of > -0,657 obtained with “CVCACS” model was predictive for development of CVC during ACS hospital period, while ≤ -0,657 was associated with favorable course of ACS hospital period

Results of hydrological studies and channel analysis of the Ganges (Padma) River at the construction site of the “Rooppur” NPP

This work presents the results of research on channel processes in the Padma River (Republic of Bangladesh) at the construction site of the “Ruppur” Nuclear Power Plant (NPP). The fluvial characteristics of the Padma River were presented, including: the water outflow regime, characteristics of anthropogenic impact on the river outflow and assessment of the present state of the channel and floodplain. The research was conducted based on field expeditions, during which data on morphology, dynamics, hydrological and hydraulic conditions for the formation of the floodplain-channel complex were collected. Moreover, the water discharges and suspended sediments, as well as the longitudinal profiles of the water level and the channel morphology were measured. The presented research has shown that comprehensive and planned regulation of selected sections of rivers could lead to the channel stabilization and support the rational use of water resources for different purposes, e.g. power plants, municipal purposes, etc. Moreover, detailed research on channel deformation in selected areas indicated the major role of natural factors (geological structure, the type of sediments delivered to the river, vegetation cover, etc.) in the past and present fluvial processes

Past distribution of Tilia-feeding Phyllonorycter micromoth (Lepidoptera: Gracillariidae) in the Russian Far East based on survey of historical herbarium

Distribution data of Tilia-feeding Phyllonorycter in the Russian Far East have been retrieved from a century-old Tilia herbarium stored in Vladivostok. Overall, 280 typical mines of Phyllonorycter, some with larvae and pupae, were found on 61 out of 799 herbarized specimens of Tilia spp. collected in Khabarovskii krai and Primorskii krai. For the first time, the presence of Tilia-feeding Phyllonorycter has been documented in Amurskaya oblast and Jewish Autonomous oblast. High densities of the leafminer have been recorded on Tilia amurensis sampled in Khabarovskii krai and Primorskii krai between 1937 and 2005 suggesting a population dynamics with recurrent outbreaks. Our results confirm the importance of historical herbarium collections in studying trophic interactions and invasion ecology of folivore organisms

Isolation and characterization of a subtilisin-like proteinase of Bacillus intermedius secreted by the Bacillus subtilis recombinant strain AJ73 at different growth stages

Two subtilisin-like serine proteinases of Bacillus intermedius secreted by the Bacillus subtilis recombinant strain AJ73 (pCS9) on the 28th and 48th h of culture growth (early and late proteinase, respectively) have been isolated by ion-exchange chromatography on CM-cellulose and by FPLC. Molecular weights of both proteinases were determined. The N-terminal sequences of the recombinant protein and mature proteinases of the original strain were compared. Kinetic parameters and substrate specificities of the early and late proteinase were analyzed. Physicochemical properties of the enzymes were studied. © Nauka/Interperiodica 2007

ОЦЕНКА ПОЛИМОРФИЗМА ESR1-PVUII ГЕНА ЭСТРОГЕНОВОГО РЕЦЕПТОРА У СВИНЕЙ С ИСПОЛЬЗОВАНИЕМ МЕТОДА ПЦР–ПДРФ И ТЕХНОЛОГИИ HRM-АНАЛИЗА

The DNA typing for the estrogen receptor gene (ESR1) in pigs is proposed to carry out with the aid of the technology of the HRM-analysis (High Resolution Melting) and continue to use it as an express method for mass screening of breeding animals in order to increase the fertility and to improve the breeding animals process in the pig. Assessed polymorphism ESR1-PvuII of the estrogen receptor gene in the Belarusian large white pigs (n = 51) with the use of the HRM-analysis, which is highly sensitive and cost-effective as compared to the traditional PCR-RFLP method. The conditions for real-time PCR are worked out, the accuracy of identification of genotypes AA, BB, AB is confirmed, and the effectiveness of the HRM-method is also analyzed.ДНК-типирование свиней по гену эстрогенового рецептора (ESR1) предлагается проводить с помощью технологии HRM-анализа (High Resolution Melting) и в дальнейшем использовать его как экспресс-метод для массового скрининга племенных животных с целью повышения плодовитости особей и усовершенствования селекционного процесса в свиноводстве. Проведена оценка полиморфизма ESR1-PvuII гена эстрогенового рецептора у свиней белорусской крупной белой породы (n = 51) с использованием HRM-анализа, который обладает высокой чувствительностью и экономически выгоден по сравнению с традиционным методом ПЦР–ПДРФ. Отработаны условия проведения ПЦР в реальном времени, подтверждена достоверность определения генотипов АА, ВВ, АВ, а также проанализирована эффективность HRM-метода