Diffusive gas transport through flooded rice systems

Diffusive gas transport through flooded rice systems

A fully mechanistic model based on diffusion equations for gas transport in a flooded rice system is presented. The model has transport descriptions for various compartments in the water-saturated soil and within the plant. Plant parameters were estimated from published data and experiments independent of the validation experiment. An independent experiment is described in which the diffusion c...

Soil fertility in flooded and non-flooded irrigated rice systems

Simulation Diffusive and Advective Transport of Radon Gas through Concrete Samples

The model based on Method of Finite Elements (MFE) which simulates the radon diffusion through the concrete sample in the form of cylinder, is defined in the present work. The diffusion process with concurrent radioactive decay of radon is considered in the model. Differential equations which describes the diffusion and other involved processes were replaced by a system of linear equations of f...

Gaseous emissions from flooded rice paddy agriculture

[1] Modification of continental land for agricultural use has increased over the last century. Atmospheric impact of this land use change has only been addressed for a few ecosystems and compounds. This paper provides, to date, the most comprehensive examination of gaseous emissions from rice paddies. We report seasonal emission ranges and integrated emission totals for 55 chemical species. Thi...

Optimizing Diffusive Transport Through a Synthetic Membrane Channel

Position x P1 P2 P3 Transport of ions, [ 1 , 2 ] proteins, [ 3 ] antibiotics [ 4 , 5 ] and other macromolecular solutes through channels and pores is ubiquitous in nature. In particular channel-facilitated diffusion relies on optimized binding sites for the transported particles inside the channel. [ 6 ] Well characterized examples include membrane channels such as maltoporins [ 7 , 8 ] or aqua...