82 results found

Search Results for: particle

Signal recognition particle

Definition noun A protein-RNA complex important in binding to the mRNA for the recognition of signal peptide on a nascent... Read More

Phagocytosis

Phagocytosis Definition Phagocytosis is a basic physiological cellular process wherein a cell ingests a solid particle... Read More

Particle

particle (Science: chemistry) A tiny mass of material. Origin: L. Particula, dim. Of pars =... Read More

Nucleosome

Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More

Atom

In the enchanting tapestry of life, the smallest of heroes and a celestial protagonist emerges—'the atom'. With grace and... Read More

Pseudopodia

A pseudopodium (plural: pseudopodia) refers to the temporary projection of the cytoplasm of a eukaryotic cell. Pseudopodia... Read More

Vibration

vibration 1. The act of vibrating, or the state of being vibrated, or in vibratory motion; quick motion to and fro;... Read More

Reverse passive agglutination

Definition noun A type of agglutination reaction in which known antibody is bound to a carrier particle instead of the... Read More

Soils

Where a plant grows and what resources are available to it is of vital importance to the life of a plant. The soil type and... Read More

Active agglutination

Definition noun An agglutination reaction in which the antigen is found naturally on particle Supplement Agglutination... Read More

Molecule

Molecule Definition Two or more atoms (same or different) that are held together by attractive forces or chemical bonds... Read More

Signal sequence

Definition noun A sequence of amino acid residues bound at the amino terminus of a nascent protein during protein... Read More

Endoplasmic reticulum

Endoplasmic Reticulum Definition The endoplasmic reticulum is a membrane-bound organelle in cells of eukaryotic cells... Read More

Contamination

Contamination Definition Contamination, sometimes interchanged with pollution, is the existence of live things or... Read More

Filtration

Filtration Definition What is filtration? Filtration is separating a solid from a fluid through a porous material that... Read More

Diffusion

Diffusion Definition Diffusion is the net passive movement of molecules or particles from regions of higher to regions of... Read More

Photon

Definition noun, plural: photons (physics) A quantum unit of light energy or electromagnetic radiation Supplement A photon... Read More

Plaque-forming unit

Definition A measure of the quantity of individual infectious particles (e.g. virus particles) based on the number of... Read More

Cross-sections

Cross-section (Science: physics) Usually refers to the (apparent) area presented by a target particle to an oncoming... Read More

Substance

Substance Definition What is a substance? The word substance finds varied usages in different science fields. In general... Read More

Ribosome

A biological cell is composed of many components called organelles. These organelles serve their specific purposes to make... Read More

Desolvation

Definition noun The removal or dissociation of the solvent component from the particle as a method of drying a sample or... Read More

Transfection

Definition noun (molecular biology) The process of deliberate introduction of nucleic acids into a recipient eukaryotic... Read More

Infectious heredity

Definition noun A non-Mendelian inheritance in which an infectious particle within the cell of the host may bring changes in... Read More

Opsonin

Definition noun, plural: opsonins Any substance (e.g. antibody) that binds to the surface of a particle (e.g. antigen) to... Read More

Otolith

Definition noun, plural: otoliths A crystalline particle of calcium carbonate and a protein adhering to the gelatinous... Read More

Phagosome

Definition noun plural: phagosomes phag·o·some, ˈfæg əˌsoʊm (cell biology) A vesicle that forms by pinching off... Read More

Intracellular digestion

Intracellular Digestion Definition What is intracellular digestion? ‘Intra’ means "inside" and ‘cellular’ pertains... Read More

photomedicine

Photomedicine Definition Photomedicine is a branch of medicine that specializes in the therapeutic application of light. As... Read More

Statolith

Definition noun, plural: statoliths (zoology) An otolith, i.e. a crystalline particle of calcium carbonate and a protein... Read More

Signal peptide

Definition noun An extra-peptide extension found at the amino terminus of a nascent protein, and functions by prompting the... Read More

Prion

prion Origin: proteinaceous infectious particle (microbiology) an infectious protein particle similar to a virus but... Read More

Cross-section

Cross-section (Science: physics) Usually refers to the (apparent) area presented by a target particle to an oncoming... Read More

Activation

Definition noun (general) The state or the process of being active and/or effective (biochemistry) The process of making a... Read More

Peritoneum

What is the Peritoneum? The term peritoneum refers to the serous membrane that constitutes the biologically active inner... Read More

Nucleus

In cell biology, the nucleus is the large, membrane-bounded organelle that contains the genetic material in the form of... Read More

Mechanical equilibrium

Definition noun A state of a physical system at rest or in unaccelerated motion, and where the sum of all forces and torque... Read More

Memory T cell

Definition noun, plural: memory T cells A long-lived T cell that bears receptors for an antigen during its encounter with a... Read More

Antigen

Antigen Definition What is an antigen? A simple definition is that an antigen refers to any substance that triggers an... Read More

Cell division

Cell division is a biological process by which a parent cell duplicates its cell contents and divides to give rise to two or... Read More