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Barkhatov N.A.,Nizhny Novgorod State Pedagogical University | Barkhatova O.M.,Nizhny Novgorod State University of Architecture and Civil Engineering | Grigor'ev G.I.,Radiophysical Research Institute
Geomagnetism and Aeronomy | Year: 2014

In the first part of study the possibility of high frequency (HF) and low frequency (LF) modes of magnetogravity waves (MGW) propagation in the equatorial atmosphere in conditions of ionospheric F2 layer is demonstrated taking into account the finite conductivity. Here the spectral features of the excited HF MGW mode is studied. At the second part of study the dispersion relations for LF MGW in the ionospheric equatorial region is received. The spectral features of the disturbed components of medium displacement for LF MGW generated by a mass source are investigated. The results are applied to calculate the values of the spectral components of magnetogravity density, pressure and magnetic field disturbances caused by horizontal meteor sweep. The estimates may be useful in the analysis of ionospheric disturbances excited by high-energy geophysical sources. © Pleiades Publishing, Ltd 2014. Source


Barkhatov N.A.,Nizhny Novgorod State University of Architecture and Civil Engineering | Barkhatova O.M.,Nizhny Novgorod State Pedagogical University | Grigor'ev G.I.,Radiophysical Research Institute
Geomagnetism and Aeronomy | Year: 2014

The possibility of magnetogravity wave (MGW) propagation in the equatorial ionosphere taking into account the finite conductivity is analyzed. The dispersion relation shows the existence of two propagating MGW modes in ionospheric layer F2: high-frequency (HF MGW) and low frequency (LF MGW). The dispersion relations for them are executed and the characteristic frequencies and propagation velocities are determined. In this part of research the spectral features of disturbances in components of environment displacement for HF MGW, generated by a mass source, is carried out. The results are applied to estimate the values of density, pressure and magnetic field spectral components of magnetogravity disturbances caused by horizontal meteor sweep. They may be useful in the analysis of ionospheric disturbances excited by high energy geophysical sources. © 2014, Pleiades Publishing, Ltd. Source


Fedushkin I.L.,Novgorod State University | Sokolov V.G.,Novgorod State University | Piskunov A.V.,Novgorod State University | Makarov V.M.,Nizhny Novgorod State Pedagogical University | And 2 more authors.
Chemical Communications | Year: 2014

A gallium(i) carbenoid derived from redox-active diimine 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-bian) in complexes with molybdenum may serve either as a neutral [(dpp-bian)Ga:] or an anionic [(dpp-bian)Ga:]- two-electron donor depending on the electronic state of the transition metal. This journal is © the Partner Organisations 2014. Source


Balachova T.,The University of Oklahoma Health Sciences Center | Bonner B.,The University of Oklahoma Health Sciences Center | Chaffin M.,The University of Oklahoma Health Sciences Center | Bard D.,The University of Oklahoma Health Sciences Center | And 3 more authors.
Addiction | Year: 2012

Aims Alcohol-exposed pregnancies (AEP) are the direct cause of fetal alcohol spectrum disorders (FASD). This study examines drinking patterns among pregnant and non-pregnant women of childbearing age in Russia, a country with one of the highest levels of alcohol consumption in the world. Design Cross-sectional survey. Setting Seven public women's clinics in two locations: St Petersburg (SPB) and the Nizhny Novgorod region (NNR). Participants A total of 648 pregnant and non-pregnant childbearing-age women. Measurements A face-to-face structured interview assessed alcohol consumption, pregnancy status/possibility of becoming pregnant and consumption before and after pregnancy recognition. Findings Eighty-nine per cent of non-pregnant women reported consuming alcohol and 65% reported binge drinking in the past 3 months; 47% in NNR and 28% in SPB reported binges at least monthly. Women who might become pregnant consumed alcohol similarly to women who were not likely to become pregnant, and 32% of women in SPB and 54% in NNR were categorized as at risk for AEP. There was a significant decline in drinking after pregnancy identification. Twenty per cent of pregnant women reported consuming alcohol and 6% in SBP (none in NNR) reported binge drinking; however, a high prevalence of binge drinking was found among women who might become pregnant or who were trying to conceive. Conclusions Russian women substantially reduce drinking after pregnancy recognition compared to pre-pregnancy levels. No reductions were found prior to pregnancy recognition, either when a woman might become pregnant or when she was trying to conceive. The pre-conception period presents a risk window and, therefore, a prevention opportunity. © 2011 The Authors, Addiction © 2011 Society for the Study of Addiction. Source


Balachova T.,The University of Oklahoma Health Sciences Center | Sobell L.C.,Nova Southeastern University | Agrawal S.,Gallup Consulting | Isurina G.,Saint Petersburg State University | And 3 more authors.
Addictive Behaviors | Year: 2015

Introduction: Low rates of contraception and at-risk drinking place many Russian women at risk of an alcohol-exposed pregnancy (AEP). The only realistic way to determine when women are at risk of AEP is by self-reports. A U.S. study found that a single binge-drinking question (SBD) effectively identified nearly all women whose drinking placed them at risk of AEP. Methods: The present study replicated the U.S. study. Participants were 689 non-pregnant Russian women of childbearing age who were at AEP risk. Their answers to SBD, "During the previous three months, how often did you have four or more drinks on one occasion", were compared with their reports of binge drinking on a 90-day Timeline Followback (TLFB) calendar. Results: The SBD identified 99% of at-risk Russian women as binge drinkers, replicating U.S. findings. Only 8% of the women were identified at-risk using a second AEP criterion of ≥ 8 drinks on average per week. Although Russian women did not report heavy weekly drinking and two-thirds did not meet AUDIT criteria for problem drinking, when they did drink, 40% of the time it was binge drinking. Conclusions: Almost all Russian women who were at risk of an AEP were identified by a single binge-drinking question. Results from this study suggest that Russian health care practitioners can use SBD to successfully screen women for AEP risk. SBD identified 99% of Russian women who were at AEP risk. Consequently, it is recommended that SBD be incorporated into routine health care © 2015 Elsevier Ltd. Source

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