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Divnomorskoye, Russia

Dmitriev V.G.,State Scientific Center
Acoustical Physics

The paper presents the results of studying a breadboard model of a vector combined hydroacoustic array created in the mid-1980s. The combined sensor array was developed on the basis of molecular-electronic hydroacoustic pressure-gradient sensors. According to the experimental data, the gain from joint processing of the total pressure and pressure-gradient channels exceeded 20 dB. The paper discusses the parameters of molecular-electronic converters, which ensured the qualitative characteristics of the combined array. © 2013 Pleiades Publishing, Ltd. Source

Kamenskaya O.E.,RAS Shirshov Institute of Oceanology | Melnik V.F.,State Scientific Center | Gooday A.J.,UK National Oceanography Center
Zhurnal Obshchei Biologii

Our previous investigations showed that giant protists (xenophyophores and komokiaceans) are one of the key groups in the deep-sea mega- and macrobenthos, dominating in density and biomass in some areas of the World Ocean. Analyses of 38600 seafloor photographs and fauna from 30 box-corers taken in the Russian Exploratory area at the Clarion-Clipperton Fracture Zone ferromanganese nodule field revealed a diverse and abundant fauna of these organisms. Xenophyophores were found on 70% of seafloor photographs. Their abundance averaged 1600 specimens per hectare, whereas abundance of the next common group, Actiniaria, did not exceed 170 specimens per hectare. The maximum abundance of xenophyophores was 12 specimens per m2 (equal to 120000 specimens per hectare). In the box-corers, xenophyophores were found in 30% of samples. The most common group in these samples was Komokiacea. They occurred in 100% of samples. It was shown earlier that abundance and species diversity of macro- and meiobenthos increased when xenophyophores and komokiaceans were present. On the Russian exploratory area, the giant protists structure benthic communities. Study of these protists is especially important in the light of mining planned in the deep sea and for understanding of recovery of benthic communities after mining. We have found 6 species of xenophyophores, 4 of them were new and 25 species of komokiaceans, most part of part of them was not known earlier. Source

Konarev A.A.,State Scientific Center | Novikov V.T.,Mendeleev University of Chemical Technology
Russian Journal of Electrochemistry

Polarographic behavior of 2,4-dinitrobenzene and products of its reduction, 2-chloro-5-nitroaniline and 4-chloro-3-nitroaniline, is studied: it is shown that formation of the corresponding chloronitroanilines in the case of polarographic reduction of 2,4-dinitrochlorobenzene is rather problematic. 0.1 M NaOH is recommended as the supporting solution for analytical control of conversion of 2,4-dinitrochlorobenzene and a mixture of 2-chloro-5-nitroaniline and 4-chloro-3-nitroaniline in reaction solutions obtained by preparative electroreduction of 2,4-dinitrochlorobenzene. © 2013 Pleiades Publishing, Ltd. Source

The effect is studied of the conditions of preparative reduction of naphthalene 1-nitro-3,6,8- trisulfo acid, particularly, the cathode material, temperature, and current density on the yield of intermediate naphthalene 1-hydroxylamino-3,6,8-trisulfo acid. It is shown that formation of naphthalene 1-hydroxy- lamino-3,6,8-trisulfo acid in reaction solutions results not only in a decrease in the yield of target naphtha- lene 1-amino-3,6,8-trisulfo acid, but also in a decrease in the quality of the latter, which is manifested in a decrease in the yield into its conversion to naphthalene 1-amino-8-oxy-3,6- disulfo acid. Conditions are found for preparative reduction of naphthalene 1-nitro-3,6,8-trisulfo acid providing the lowest yield of naph- thalene 1-hydroxylamino-3,6,8-trisulfo acid in reaction solutions. © Pleiades Publishing, Ltd., 2012. Source

Nefedov V.A.,State Scientific Center
Russian Journal of General Chemistry

Two absorption bands of ferrocene, the in-plane bending C-H vibrations (β CH) at 1002 cm -1 and out-of-plane C-H vibration (γ CH) at 816 cm -1, are accompanied with high-frequency satellites β CH (1055) and γ CH (837 cm -1). In the spectrum of 1,1′-dideuteroferrocene, only the high-frequency bands suffer an isotopic shift, from 1055 to 859 cm -1, and from 837 to 668 cm -1. Only additional incorporation of deuterium into 1,1′-dideuteroferrocene results also in an isotopic shift of the basic bands: 1002 to 771 and 816 to 632 cm -1. Therefore, one of the five carbon atoms of cyclopentadienyl ring of ferrocene differs from the other in the static state. It is assumed that just this carbon atom is bonded with the iron atom by the σ-bond. © 2011 Pleiades Publishing, Ltd. Source

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