| DI | date of injury; defective interfering [particle]; dentinogenesis imperfecta; deoxyribonucleic acid i... |
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| e | base of natural logarithms, approximately 2.7182818285; egg transfer; ejection; electric charge; ele... |
| EB | elective abortion; electron beam; elementary body; emotional behavior; endometrial biopsy; epidermol... |
| elem | elementary |
| EU | Ehrlich unit; elementary unit; emergency unit; endotoxin unit; entropy unit; enzyme unit; esterase u... |
| EB | Elementary bodies |
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| EBs | Elementary bodies |
| EB | elementary body |
| GCP | Growth cone particle |
| IAP | Intracisternal A Particle |
| elementary particle interactions | The interactions of particles responsible for their scattering and transformations (decays and reactions). Because of interactions, an isolated particle may decay into other particles. Two particles passing near each other may transform, perhaps into the same particles but with changed momenta (elastic scattering) or into other particles (inelastic scattering). Interactions fall into three groups: strong, electromagnetic, and weak. (12 Dec 1998) |
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| Zimmermann's elementary particle | <haematology> A discoid cell (3m diameter) found in large numbers in blood, important for blood coagulation and for haemostasis by repairing breaches (small breaks) in the walls of blood vessels. Platelet _ granules contain lysosomal enzymes, dense granules contain ADP (a potent platelet aggregating factor) and serotonin (a vasoactive amine). They also release platelet-derived growth factor which presumably contributes to later repair processes by stimulating fibroblast proliferation. Synonym: thrombocytes. (09 Oct 1997) |
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| sperm-ovum interactions | Interactive processes between the ovum and the spermatozoon. (12 Dec 1998) |
| food-drug interactions | The pharmacological result, either desirable or undesirable, of drugs interacting with components of the diet. (12 Dec 1998) |
| elementary bodies | Old term for virions, especially the largest virus particles, visible by light microscopy when stained. Synonym: platelet. (05 Mar 2000) |
| elementary granule | A particle of blood dust, or haemoconia. (05 Mar 2000) |
| elementary particles | <radiobiology> at a nuclear-energy level: electron & positron - seem to be stable, proton - thought to be stable, life greater than 10^30 sec, neutron - decays in ?6 min unless its in a nucleus, which often extends its life. Other particles important for nuclear energy: Muon, neutrino (m, e, tau), photon, Muonic atoms, Pi-meson antiparticles (09 Oct 1997) |
| elementary step | <chemistry> Reaction mechanisms are broken down into elementary steps. For each step the the reactants are directly involved in forming the transition state. Therefore a rate law can be written from an elementary step but not from an overall reaction. (09 Jan 1998) |
| alpha particle | <physics> A radioactive particle made up of two protons and two neutrons, these particles are created by the decay of a radioactive material or by nuclear bombardment, and they are the same as the nucleus of a helium-4 atom. (09 Oct 1997) |
| beta particle | <physics, radiobiology> An electron or positron emitted from a radioactive nucleus during beta decay. (09 Oct 1997) |
| genes, intracisternal a-particle | A family of retrovirus-like genetic elements coding for virus-like particles found regularly in early rodent embryos (2-cell to blastocyst stage), but which, under certain circumstances such as DNA hypomethylation, are transcribed in a wide variety of neoplasms, including plasmacytomas, neuroblastomas, rhabdomyosarcomas, teratocarcinomas, and colon carcinomas. (12 Dec 1998) |
| particle | <chemistry> A tiny mass of material. Origin: L. Particula, dim. Of pars = part (18 Nov 1997) |
| particle accelerators | Devices which accelerate electrically charged atomic or subatomic particles, such as electrons, protons or ions, to high velocities so they have high kinetic energy. (12 Dec 1998) |
| particle fluence | <chemistry, radiobiology> at a given point in space, the sum of energies, the number of particles or photons incident during a given time interval on a small sphere centreed at that point, divided by the cross-sectional area of that sphere. It is identical with the time integral of the particle flux density. (16 Dec 1997) |
| charged particle | <radiobiology> A particle which carries a positive or negative electrical charge. In plasma physics, this typically means an ionised atom or molecule, or an electron. (09 Oct 1997) |
| core particle | The group of eight histones (protein molecules which act like spools for DNA to wrap around so that it can be compacted to fit within the nucleus) in the middle of a nucleosome (which is the histone core particle plus the small segment of DNA wrapped around it). (09 Oct 1997) |
Synonyms : Elementary Particle Interaction, Interaction, Elementary Particle, Interactions, Elementary Particle, Particle Interaction, Elementary
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