Search results
Results from the WOW.Com Content Network
Hydraulic redistribution is a passive mechanism where water is transported from moist to dry soils via subterranean networks. [1] It occurs in vascular plants that commonly have roots in both wet and dry soils, especially plants with both taproots that grow vertically down to the water table, and lateral roots that sit close to the surface.
A patient lift (patient hoist, jack hoist, Hoyer lift, or hydraulic lift) may be either a sling lift or a sit-to-stand lift.This is an assistive device that allows patients in hospitals and nursing homes and people receiving home health care to be transferred between a bed and a chair or other similar resting places, by the use of electrical or hydraulic power.
Hydraulic lift may refer to: A type of hydraulic machinery. Hydraulic elevator; A form of hydraulic redistribution, a plant phenomenon
An essential design element of all MLS systems is that they must prevent hydraulic connection of the various monitored intervals within the wellbore. [ 1 ] While installed primarily in water-saturated sediments and rock, MLS systems can also be installed in the vadose zone for the collection of depth-discrete soil gas samples.
Hydraulic signaling is fast and effective because of the cohesion and tension properties of water. [1] Hydraulic signals can be propagated downward or upward, relaying water potential gradients throughout the entire plant. Hydraulic signals can be sensed in a few ways all relating to how an increase in water potential affects the plants.
The upward movement of water and solutes (hydraulic lift) is regulated in the roots by the endodermis [62] and in the plant foliage by stomatal conductance, [63] and can be interrupted in root and shoot xylem vessels by cavitation, also called xylem embolism. [64]
Artificial lift is the use of artificial means to increase the flow of liquids, such as crude oil or water, from a production well. Generally this is achieved by the use of a mechanical device inside the well (known as pump or velocity string) or by decreasing the weight of the hydrostatic column by injecting gas into the liquid some distance down the well.
Environmental impact of fracking in the United States has been an issue of public concern, and includes the contamination of ground and surface water, methane emissions, [1] air pollution, migration of gases and fracking chemicals and radionuclides to the surface, the potential mishandling of solid waste, drill cuttings, increased seismicity and associated effects on human and ecosystem health.