Fixation may refer to: *

Carbon fixation Biological carbon fixation or сarbon assimilation is the process by which inorganic carbon (particularly in the form of carbon dioxide) is converted to organic compounds by living organisms. The compounds are then used to store energy and as ...

, a biochemical process, usually driven by photosynthesis, whereby carbon dioxide is converted into organic compounds *

Fixation (alchemy) In alchemy, fixation is a process by which a previously volatile substance is "transformed" into a form (often solid) that is not affected by fire. It separates the substance or object and puts it back in the same or different shape at a subatomic ...

, a process in the alchemical magnum opus *

Fixation (histology) In the fields of histology, pathology, and cell biology, fixation is the preservation of biological tissues from decay due to autolysis or putrefaction. It terminates any ongoing biochemical reactions and may also increase the treated tissues' mec ...

in biochemistry, histology, cell biology and pathology, the technique of preserving a specimen for microscopic study *

Fixation (population genetics) In population genetics, fixation is the change in a gene pool from a situation where there exists at least two variants of a particular gene (allele) in a given population to a situation where only one of the alleles remains. In the absence of mu ...

, the state when every individual in a population has the same allele at a particular locus *

Fixation (psychology) Fixation (german: Fixierung) is a concept (in human psychology) that was originated by Sigmund Freud (1905) to denote the persistence of anachronistic sexual traits. The term subsequently came to denote object relationships with attachments to peo ...

, the state in which an individual becomes obsessed with an attachment to another human, an animal, or an inanimate object *

Fixation (surgical) Fixation in orthopedics is the process by which an injury is rendered immobile. This may be accomplished by internal fixation, using intramedullary rod, Kirschner wire or dynamic compression plate; or by external fixation, using a spanning externa ...

, an operative technique in orthopedics *

Fixation (visual) Fixation or visual fixation is the maintaining of the gaze on a single location. An animal can exhibit visual fixation if it possess a fovea in the anatomy of their eye. The fovea is typically located at the center of the retina and is the poin ...

maintaining the gaze in a constant direction *

Fixation agent A fixation agent is a chemical that is capable to fixate one substance to another substance that the first substance have little affinity to. Applications Pulp and paper production In pulp and paper production fixation agents are used to fixate ...

, a process chemical *

Fixation in Canadian copyright law Fixation in Canadian copyright law is a threshold consideration that must be used in copyright infringement cases by courts to determine if copyright actually exists. In Canada, a work "must be expressed to some extent at least in some material for ...

, a concept in Canadian copyright law *

Nitrogen fixation Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmo ...

, a process by which nitrogen is converted from its inert molecular form to a compound more readily available and useful to living organisms *

Session fixation In computer network security, session fixation attacks attempt to exploit the vulnerability of a system that allows one person to fixate (find or set) another person's session identifier. Most session fixation attacks are web based, and most rel ...

, computer security attack *

Target fixation Target fixation is an attentional phenomenon observed in humans in which an individual becomes so focused on an observed object (be it a target or hazard) that they inadvertently increase their risk of colliding with the object. It is associated w ...

, attentional phenomenon * “Fixation”, an episode of ''The Good Doctor''

See also