sensing mechanism
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temporal sensing — Mechanism of gradient sensing in which the value of some environmental property is compared with the value at some previous time, the cell having moved position between the two samplings. Initial movement is random; until the second observation… … Dictionary of molecular biology
pseudospatial gradient sensing — Mechanism for sensing a gradient of a diffusible chemical in which the cell sends protrusions out at random; up gradient protrusions are stabilized by positive feedback (because receptor occupancy is rising with time) and others are transitory… … Dictionary of molecular biology
spatial sensing — Mechanism of sensing a gradient in which the signal is compared at different points on the cell surface and cell movement directed accordingly. Translocation of all or part of the cell is not required. See temporal and pseudospatial gradient… … Dictionary of molecular biology
Quorum sensing — is a type of decision making process used by decentralized groups to coordinate behavior. Many species of bacteria use quorum sensing to coordinate their gene expression according to the local density of their population. Similarly, some social… … Wikipedia
Collocation (remote sensing) — Collocation is a procedure used in remote sensing to match measurements from two or more different instruments. This is done for two main reasons: for validation purposes when comparing measurements of the same variable, and to relate… … Wikipedia
Direct drive mechanism — A Direct drive mechanism is one that takes the power coming from a motor without any reductions (such as a gearbox). Contents 1 Advantages 2 Disadvantages 3 Applications 3.1 High speed … Wikipedia
Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… … Wikipedia
Pressure sensor — Digital air pressure sensor Compact digital barometric pressure sensor A pressure sensor measure … Wikipedia
N-Acyl homoserine lactone — General chemical structure of an N acyl homoserine lactone N Acyl homoserine lactones (AHLs or N AHLs) are a class of signaling molecules involved in bacterial quorum sensing. Quorum sensing is a method of communication between bacteria that… … Wikipedia
Gravitropism — [or geotropism ] is a turning or growth movement by a plant or fungus in response to gravity. Charles Darwin was one of the first Europeans to document that roots show positive gravitropism and stems show negative gravitropism . That is, roots… … Wikipedia
Miniature snap-action switch — Comparison of some different switches. A miniature snap action switch, also trademarked and frequently known as a micro switch, is an electric switch that is actuated by very little physical force, through the use of a tipping point mechanism,… … Wikipedia
