scholarly journals Details of Gas Flow in Wetland Plant Roots Unearthed

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
David Shultz
Keyword(s):  
Gas Flow ◽  
Trace Gases ◽  
Root Systems ◽  
Plant Roots ◽  
Wetland Plant ◽  
Biogenic Gas ◽  
Gas Fluxes

Scientists track the flow of trace gases through wetland root systems to understand the role of plants in biogenic gas fluxes.

Natural attenuation potential of tricholoroethene in wetland plant roots: Role of native ammonium-oxidizing microorganisms

Chemosphere ◽  
2015 ◽  
Vol 119 ◽  
pp. 971-977 ◽  
Author(s):  
Ke Qin ◽  
Garrett C. Struckhoff ◽  
Abinash Agrawal ◽  
Michael L. Shelley ◽  
Hailiang Dong
Keyword(s):  
Natural Attenuation ◽  
Plant Roots ◽  
Wetland Plant

The role of soil resistance in determining water uptake by plant root systems

Soil Research ◽  
1983 ◽  
Vol 21 (4) ◽  
pp. 571 ◽  
Author(s):  
NR Hulugalle ◽  
ST Willatt
Keyword(s):  
Water Stress ◽  
Hydraulic Conductivity ◽  
Water Uptake ◽  
Plant Root ◽  
Soil Water Potential ◽  
Root Systems ◽  
Plant Roots ◽  
Soil Resistance ◽  
Plant Root Systems

Resistance to water flow in plant roots has been suggested as a significant factor limiting water uptake by plants. The results of previous experiments have been used to show that soil resistance may be more significant than has recently been suggested, particularly in soils of low hydraulic conductivity and where root density is low. As the technique used to determine soil resistance relies on hydraulic conductivity, the latter may be more appropriate as an indicator of water stress than soil water potential.

The role of gas flow distributions on CO2 mineralization within monolithic cemented composites: coupled CFD-factorial design approach

2021 ◽  
Author(s):  
Iman Mehdipour ◽  
Gabriel Falzone ◽  
Dale Prentice ◽  
Narayanan Neithalath ◽  
Dante Simonetti ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Factorial Design ◽  
Material Properties ◽  
Gas Flow ◽  
Design Approach ◽  
Processing Conditions ◽  
Gas Processing ◽  
Co2 Mineralization

Optimizing the spatial distribution of contacting gas and the gas processing conditions enhances CO2 mineralization reactions and material properties of carbonate-cementitious monoliths.

Quantifying sources and sinks of trace gases using space-borne measurements: current and future science

2008 ◽  
Vol 366 (1885) ◽  
pp. 4509-4528 ◽  
Author(s):  
Paul I Palmer
Keyword(s):  
Trace Gases ◽  
Lower Troposphere ◽  
Biological Interactions ◽  
Satellite Measurements ◽  
Sources And Sinks ◽  
The Past ◽  
Fundamental Understanding ◽  
Earth’S Climate ◽  
New Generation

We have been observing the Earth's upper atmosphere from space for several decades, but only over the past decade has the necessary technology begun to match our desire to observe surface air pollutants and climate-relevant trace gases in the lower troposphere, where we live and breathe. A new generation of Earth-observing satellites, capable of probing the lower troposphere, are already orbiting hundreds of kilometres above the Earth's surface with several more ready for launch or in the planning stages. Consequently, this is one of the most exciting times for the Earth system scientists who study the countless current-day physical, chemical and biological interactions between the Earth's land, ocean and atmosphere. First, I briefly review the theory behind measuring the atmosphere from space, and how these data can be used to infer surface sources and sinks of trace gases. I then present some of the science highlights associated with these data and how they can be used to improve fundamental understanding of the Earth's climate system. I conclude the paper by discussing the future role of satellite measurements of tropospheric trace gases in mitigating surface air pollution and carbon trading.

Role of the Spatial Distribution of Gas Flow for Tuning the Vertical/Planar Growth of Nonlayered Two-Dimensional Nanoplates

2021 ◽  
Author(s):  
Xukun Zhu ◽  
Lokwing Wong ◽  
Xiulian Fan ◽  
Jiong Zhao ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Gas Flow ◽  
Two Dimensional ◽  
Planar Growth

Iron plaque formation on wetland-plant roots accelerates removal of water-borne antibiotics

2018 ◽  
Vol 433 (1-2) ◽  
pp. 323-338 ◽  
Author(s):  
Yiping Tai ◽  
Nora Fung-Yee Tam ◽  
Rui Wang ◽  
Yang Yang ◽  
Jianhua Lin ◽  
...  
Keyword(s):  
Plaque Formation ◽  
Iron Plaque ◽  
Plant Roots ◽  
Wetland Plant ◽  
Water Borne

scholarly journals Model Test of the Reinforcement of Surface Soil by Plant Roots under the Influence of Precipitation

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Hengxing Wang ◽  
Yulong He ◽  
Zufeng Shang ◽  
Chunpeng Han ◽  
Yilu Wang
Keyword(s):  
Water Content ◽  
Model Test ◽  
Surface Soil ◽  
Plant Root ◽  
Root Systems ◽  
Reinforced Soil ◽  
Plant Roots ◽  
Interfacial Friction ◽  
Negative Power ◽  
Pull Out

We present the results of the reinforcement of plant root systems in surface soil in a model test to simulate actual precipitation conditions. In the test, Eleusine indica was selected as herbage to reinforce the soil. Based on the various moisture contents of plant roots in a pull-out test, a fitting formula describing the interfacial friction strength between the roots and soil and soil moisture content was obtained to explain the amount of slippage of the side slope during the process of rainfall. The experimental results showed that the root systems of plants successfully reinforced soil and stabilized the water content in the surface soil of a slope and that the occurrence time of landslides was delayed significantly in the grass-planting slope model. After the simulated rainfall started, the reinforcement effect of the plant roots changed. As the rainfall increased, the interfacial friction between the roots and the soil exhibited a negative power function relationship with the water content. These conclusions can be used as a reference for the design of plant slope protection and reinforcement.

scholarly journals The influence of argon gas flow in the killing of staphylococcus epidermidis bacteria

2018 ◽  
Vol 16 (36) ◽  
pp. 134-139
Author(s):  
Ahmed Mahmoud Shihab
Keyword(s):  
Staphylococcus Epidermidis ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Biotechnological Applications ◽  
Plasma System ◽  
Argon Gas ◽  
Killing Rate ◽  
Normal Atmospheric Pressure ◽  
Non Thermal Plasma

In this research, non-thermal plasma system of argon gas is designed to work at normal atmospheric pressure and suitable for work in medical and biotechnological applications. This technique is applied in the treatment of the Staphylococcus epidermidis bacteria and show the role of the flow rate of Argon gas on the killing rate of bacteria, and it obtained a 100 % killing rate during the time of 5 minutes at the flow Argon gas of 5 liters/ min.

scholarly journals Research on the Sea-Buckthorn (Hippophae rhamnoides L.) Eco-Restoration Value in Avoiding Erosion and Supporting Soil Fixation

2016 ◽  
Vol 73 (2) ◽  
pp. 343
Author(s):  
Carmen Georgeta Dumitrescu (Manole)
Keyword(s):  
Root System ◽  
Sea Buckthorn ◽  
Hippophae Rhamnoides ◽  
Plant Roots ◽  
Hippophaë Rhamnoides ◽  
Supporting Soil ◽  
Real Importance ◽  
Hippophae Rhamnoïdes L ◽  
Root Suckers

This paper approaches an issue of real importance, namely the sea-buckthorn influence on the areas attacked by erosion. We consider that this effect is mainly a result of its extremely developed root system, as well as of the nodosities formation on the roots. The study was conducted over a period of 3 years (2011-2013) in two landslides areas from Prahova and Dambovita counties, from where were collected 5 plants (from each area) in 3 repetitions. Calculating the averages regarding the plant roots depth, but also the number of root suckers and nodosities, can be easily deduced the role of these plants in soil fixation, hence their eco-restoration value.

Conversaziones 1974

1975 ◽  
Vol 29 (2) ◽  
pp. 163-171
Keyword(s):  
Electron Microscopy ◽  
Fine Structure ◽  
Cell Walls ◽  
Structural Changes ◽  
Vascular Tissue ◽  
Root Systems ◽  
Plant Roots ◽  
Tracer Studies ◽  
Water Move ◽  
Intact Root

CONVERSAZIONES were held this year on 9 May and 27 June. At the first conversazione twenty-seven exhibits and two films were shown. The fine structure of plant roots in relation to transport of nutrient ions and water was demonstrated by Dr D. T. Clarkson of the A.R.C. Letcombe Laboratory, Wantage and Dr A. W. Robards of the Department of Biology, University of York. Two major pathways by which nutrients and water move radially across the cortex towards the central vascular tissue have been distinguished by the use of tracer studies of adsorption by different zones of intact root systems, microautoradiography and electron microscopy. Movement can be apoplastic through cell walls, or symplastic between cells joined by plasmodesmata. As the root ages, structural changes in the endodermis reduce movement in the former pathway but the symplast is not interrupted by the elaboration of endodermal walls because plasmodesmatal connexions remain intact. These observations help explain the contrasting extent to which different ions and water reach the shoot from young and mature parts of root systems.

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