Fixation may refer to: *

Carbon fixation Biological carbon fixation, or сarbon assimilation, is the Biological process, process by which living organisms convert Total inorganic carbon, inorganic carbon (particularly carbon dioxide, ) to Organic compound, organic compounds. These o ...

, 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 subatomi ...

, 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. That is, the allele ...

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

Fixation (psychology) Fixation () 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 people or things in ...

, 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 external ...

, 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 poi ...

maintaining the gaze in a constant direction * Fixation agent, a process chemical * Fixation in Canadian copyright law, a concept in Canadian copyright law *

Nitrogen fixation Nitrogen fixation is a chemical process by which molecular dinitrogen () is converted into ammonia (). It occurs both biologically and abiological nitrogen fixation, abiologically in chemical industry, chemical industries. Biological nitrogen ...

, 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 r ...

, computer security attack * Target fixation, attentional phenomenon * “Fixation”, an episode of ''The Good Doctor''

See also