The effect of bubble-mediated gas transfer on purposeful dual-gaseous tracer experiments

The paper is devoted to the analysis of development prospects and problems of Eurasian Economic Union (EAEU) of Russia, Kazakhstan, Belarus and Armenia. It considers integration problems inside EAEU, interactions of EAEU with other CIS countries and with countries from the rest of the world. The paper shows that the major integration challenge inside EAEU is the domination of the redistributive motive over the creative one. It estimates the value of the oil and gas transfer from Russia to other EAEU members and the influence of the Russian tax maneuver on this transfer. The paper shows the need in redistribution mechanism inside EAEU as a necessary condition for getting the potential positive economic effects of free trade with other countries. It also assesses the risks for EAEU due to Russian embargo for food imports from countries of the sanctions list and possible application of tariff in the trade with Ukraine.

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Faculty Opinions recommendation of Pulmonary gas transfer in children and adolescents born extremely preterm.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.717967822.793467513 ◽

2012 ◽

Author(s):

Anastassios Koumbourlis ◽

Geovanny Perez

Keyword(s):

Children And Adolescents ◽

Gas Transfer ◽

Extremely Preterm

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Air-Water Gas Transfer in Coastal Waters

10.21236/ada630850 ◽

1999 ◽

Author(s):

Bernd Jaehne ◽

Jochen Klinke

Keyword(s):

Coastal Waters ◽

Gas Transfer ◽

Water Gas

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Spatial Variability of Physical Parameters and Processes in Two Field Soils

Hydrology Research ◽

10.2166/nh.1991.0022 ◽

1991 ◽

Vol 22 (5) ◽

pp. 327-340 ◽

Cited By ~ 7

Author(s):

K. Høgh Jensen ◽

J. C. Refsgaard

Keyword(s):

Transport Model ◽

Flow Direction ◽

Measurement Data ◽

Flow Simulation ◽

Solute Concentration ◽

Conclusive Evidence ◽

Physical Parameters ◽

Effective Parameters ◽

The Mean ◽

Tracer Experiments

A numerical analysis of solute transport in two spatially heterogeneous fields is carried out assuming that the fields are composed of ensembles of one-dimensional non-interacting soil columns, each column representing a possible soil profile in statistical terms. The basis for the analysis is the flow simulation described in Part II (Jensen and Refsgaard, this issue), which serves as input to a transport model based on the convection-dispersion equation. The simulations of the average and variation in solute concentration in planes perpendicular to the flow direction are compared to measurements obtained from tracer experiments carried out at the two fields. Due to the limited amount of measurement data, it is difficult to draw conclusive evidence of the simulations, but reliable simulations are obtained of the mean behaviour within the two fields. The concept of equivalent soil properties is also tested for the transport problem in heterogeneous soils. Based on effective parameters for the retention and hydraulic conductivity functions it is possible to predict the mean transport in the two experimental fields.

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Variations in gas transfer from dispersed bubbles

Water Quality Research Journal ◽

10.2166/wqrj.1967.005 ◽

1967 ◽

Vol 2 (1) ◽

pp. 73-94

Author(s):

K. L. Murphy ◽

A. W. Wilson

Keyword(s):

Gas Transfer

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New Method for Estimation of Contaminant Travel Rate in Unsaturated Zone under Irrigated Soils

Water Science & Technology ◽

10.2166/wst.1993.0549 ◽

1993 ◽

Vol 27 (7-8) ◽

pp. 173-178 ◽

Cited By ~ 4

Author(s):

M. Zilberbrand

Keyword(s):

Water Content ◽

Unsaturated Zone ◽

Sandy Loam ◽

Chestnut Soil ◽

Deep Penetration ◽

Groundwater Recharge Rate ◽

Capillary Tension ◽

Travel Rate ◽

Tracer Experiments ◽

Irrigated Soils

In a thick unsaturated zone, when quick deep penetration of rain and irrigation water is absent, at the depths below 3-5 m there exists a zone of downwards quasi-steady water flow. Darcy's water velocity in this zone remains constant with depth and equal to the groundwater recharge rate; unit hydraulic head gradient occurs above the capillary fringe. Therefore, contaminant travel rate is equal to the ratio of hydraulic conductivity (K) and effective volumetric water content (θef). Field tracer experiments and laboratory K and θef determinations were carried out for several representative irrigated lots in the South Ukraine. The dependence of θef on capillary tension was studied for the first time. For loess loam with a capillary tension decreasing from 46 kPa to 0, θef nonlinearly increases from 12% to 27-28%. The effective water content portion (β1) of the total water content increases nonlinearly from 0.38 to 0.65-0.7. The β1 values were estimated for different unsaturated sedimentary rocks. For a capillary tension of about 5 kPa β1 values were: 0.88-0.99 for sands, about 0.65 for loess loam and chestnut soil, about 0.6 for sandy loam, about 0.32 for limestone and about 0.07 for clay. Calculated chloride travel rates in loess loams under irrigated soils fit the values of 0.001-0.003 m/day, determined by the results of field tracer experiments.

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Mass Transfer Limited Wet Oxidation in Trickle-Bed Reactor

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19981938 ◽

1998 ◽

Vol 63 (11) ◽

pp. 1938-1944 ◽

Cited By ~ 1

Author(s):

Vratislav Tukač ◽

Jiří Vokál ◽

Jiří Hanika

Keyword(s):

Supported Catalyst ◽

Reaction Rates ◽

Gas Transfer ◽

Wet Oxidation ◽

Reactor Performance ◽

Catalytic Wet Oxidation ◽

Environmental Application ◽

Trickle Bed Reactor ◽

Fine Glass ◽

Trickle Bed

Catalytic activity of CuO-supported catalyst in phenol oxidation, and the influence of reaction conditions, viz. temperature (125-170 °C), oxygen partial pressure (1-7 MPa) and liquid feed (30-760 ml h-1), in the continuous operation using 17.9 mm i.d. trickle-bed reactor is presented. The hydrodynamic impact on the three-phase trickle-bed reactor performance in an environmental application of catalytic wet oxidation was also investigated. The results of trickle-bed operation were strongly influenced by wetting efficiency. An insufficient catalyst wetting can be to compensated by filling the catalyst bed voids by fine glass spheres. In the case of the gas transfer limited reaction, a better wetting of the catalyst can lead to worse reactor performance due to lower reaction rates.

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