排序方式: 共有15条查询结果,搜索用时 15 毫秒
1.
A. A. Vetrov N. V. Lobus A. N. Drozdova N. A. Belyaev E. A. Romankevich 《Oceanology》2018,58(2):198-204
The methane content in water and bottom sediments was measured in vertical sections: Lena River Delta–continental slope (the Laptev Sea), Taimyr Peninsula–Voronin Trough, and along the Novaya Zemlya Archipelago. The methane concentrations varied from 2.5 to 70 nmol/L and from 590 to 2600 nmol/L in the water column and sediments, respectively. Most of the surface water samples showed oversaturation in methane (up to 19-fold, fourfold on average), which determined the water–atmosphere direction of methane fluxes, which amounted to 1–400 mol/km2 day (52 mol/km2 day on average). 相似文献
2.
Drozdova O. Yu. Demin V. V. Makarova M. A. Karpukhin M. M. Lapitskiy S. A. 《Doklady Earth Sciences》2022,504(2):399-402
Doklady Earth Sciences - The change in the distribution of Cu compounds by size fractions with an increase in its concentration in noncontaminated surface waters has been studied experimentally. It... 相似文献
3.
This study presents data on Fe–Mn nodules first recovered from the northeastern part of the Kara Sea. Analysis of the geochemical indicators of organic matter and major and trace element compositions of nodules showed that samples with strong Mn enrichment (Mn/Fe = 2.38, on average) are dominated by terrestrial organic matter (OM), whereas Fe-rich samples (Mn/Fe = 0.20, on average) are dominated by marine biogenic OM. The variation in the n-alkane abundances in the studied nodules is independent of the sampling sites and nodule morphology. This study was conducted for the first time in the Artic region.
相似文献4.
5.
G. V. Novikov O. Yu. Bogdanova M. E. Melnikov A. N. Drozdova N. V. Lobus N. A. Shulga 《Doklady Earth Sciences》2017,477(2):1414-1418
It is shown that the reaction ability of metal cations of ore minerals in Fe–Mn crusts of the Marcus Wake Rise increases in the following manner: (Co2+ < Cu2+ < Ni2+) < (Mg2+ < Mn2+ < K+ ≈ Ca2+ ≈ Na+). The composition of the exchange complex of the ore minerals is constant and includes these metal cations. Ca2+ and Na+ are major contributors to the exchange capacity of the ore minerals. The capacity of the ore minerals by cations of alkali and base metals is 0.43–0.60 and 2.08–2.70 mg-equiv/g, respectively. The exchange capacity of the ore minerals by cations of base metals increases linearly with the increase in the MnO2 content of the crust and does not depend on the geographical locations of the Marcus Wake guyots. 相似文献
6.
G. A. Avanesov V. Yu. Belov T. Yu. Drozdova I. Yu. Katasonov M. I. Kudelin V. M. Murav’ev A. A. Forsh 《Solar System Research》2010,44(5):468-473
This article describes a device called the System for Scientific Payload Information Support (SSPIS) that controls the traffic
(commands, board time code, science and telemetry data) between the onboard computer system (OCS) and the scientific instrumentation
(SI) of the spacecraft (SC) of the Phobos-Grunt project. The functional scheme of the device and the functions of the included modules are described. The scope of the testing
of the device is considered. The software developed to perform functional testing of the hardware resources of the device
is described. 相似文献
7.
8.
Drozdova O. Yu. Ilina S. M. Anokhina N. A. Zavgorodnyaya Yu. A. Demin V. V. Lapitskiy S. A. 《Water Resources》2019,46(1):52-58
Water Resources - The composition of organic matter in the conjugated series of natural water (soil, bog, creek, and lake water) has been considered. The composition of aliphatic and aromatic... 相似文献
9.
Yu. V. Alekhin O. Yu. Drozdova Yu. A. Zavgorodnyaya G. V. Motuzova 《Moscow University Geology Bulletin》2013,68(6):380-387
The study of the mobility of elements under dynamic conditions, when the material from each of soil horizons is regarded as a separate adsorption-precipitation chromatographic column allowed us make quantitative estimates of the migration of elements using coefficients of interaction as extraction and retention coefficients. The results that were obtained during the modeling experiment made it possible to compile mobility sequences of elements in soil horizons. 相似文献
10.
A. N. Drozdova A. A. Vetrov E. A. Romankevich N. A. Prokuda S. V. Sukhoverkhov S. Yu. Bratskaya V. I. Sergienko I. P. Semiletov A. S. Ulyantsev 《Doklady Earth Sciences》2016,468(1):496-499
The distribution and genesis of polycyclic aromatic hydrocarbons (PAHs) were studied in a 40-m core from a lagoon of the Laptev Sea that appeared during the Holocene resulting from the flooding of seawater into a freshwater lake in the area of the Buor-Khaya Gulf. The bulk of the core is constituted of permafrost rocks, thawed partially in their upper layers and covered with recent sediments (mainly by the products of intense thermoabrasion). The ratio of petrogenic and pyrogenic PAHs was evaluated. 相似文献