Of particular interest was the potential gradient
shift effect shown in Fig.
The theoretical voltage gradient at a single coating flaw (valid for both DCVG and ACVG) could be described by the radial equal potential gradient
lines in an ideal situation (with uniform soil resistivity).
To evidence the potential gradient
on the ground, this method use a special voltmeter, ultrasensitive, which measure the potential difference between two un-polarized electrodes of Cu/CuS[O.
This innate electrical signaling system regulates bodily functions from the cellular level by using the movement of ions with a small positive or negative electrical charge to create concentration gradient and consequently an electric potential gradient
He assumed that water flows through the soil towards the root surface along a potential gradient
, then across the root membrane into the xylem, only when the water potential of soil water is higher than that of the root.
If the potential gradient
is small relative to the concentration gradient of the migrated ions, the ions diffuse along the concentration gradient.
The survey entailed concurrent Gradient Array Resistivity and Spontaneous Potential Gradient
surveying over a 30m x 100m grid spacing.
Moreover, the mirror region must be screened from the grounded vacuum chamber by a cylindrical grid or film, which will maintain a linear potential gradient
at the circumference of the active volume.
We may have to build in a potential gradient
to separate the gases," says Dobson.
Similarly soil water flow is controlled by the potential gradient
between the soil and the plant root (Herkelrath et al.
This consists of the direct measurement of the soil water potential gradient
[Delta][Psi]/[Delta]z and the water content [Theta] or soil water potential [Psi] at the depth of interest in the soil.
Soil water dynamics have been described using the Darcy-Buckingham equation, which relates the soil water flux density to the total soil water potential gradient
through the soil hydraulic conductivity.