(n.) The mesial plane dividing the body of an animal into similar right and left halves. The line in which it meets the dorsal surface has been called the dorsimeson, and the corresponding ventral edge the ventrimeson.
Example Sentences:
(1) The effect of 70 MeV pi mesons was studied to determine the effectivness of such beams aginst normal tissues in vivo.
(2) Negative pi-meson (pion) therapy employing dynamic scanning with a focused spot of convergent beams has been in use since 1981 at SIN.
(3) These studies will be extended to include negative pi mesons and heavy particles.
(4) The results indicate that pi mesons are not signifacantly more effective for these end-points than more conventional radiation sources such as 60Co gama rays, 220 kVp X rays, and 14 MeV X rays and electrons.
(5) From these data, the relative biologic effectiveness (RBE) of negative pi-mesons with respect to x-rays was determined for each fractionation schedule.
(6) Cultured human kidney T-1 cells were irradiated in flasks or on coverslips at different depths in a water phantom using the Los Alamos Meson Physics Facility Biomedical negative pion beam.
(7) The depth dose profiles of unstable chromosome aberrations were determined by irradiating blood samples at various depths in a plastic phantom exposed to a beam of negative pi mesons (pions).
(8) Negative Pi-mesons (pions) are applied at the Paul Scherrer Institute in the radiotherapy of highly malignant gliomas using a dose escalation program.
(9) The number of heavy tracks (category 4) shows an increased incidence in the region of the stopping pi- mesons (14-5 cm in perspex) while the number of single grains (category 1) decreases with depth.
(10) The possibility exists that high LET (linear energy transfer) radiation such as neutron or pi meson beams may provide better local control than conventional radiation.
(11) Preliminary biological experiments with pions produced at the Los Alamos Meson Physics Facility studied cell survival at various radiation depths and cell cycle sensitivity.
(12) This paper describes the results obtained from in vivo studies of the pion beam at the TRI University Meson Facility (TRIUMF).
(13) Two hundred twenty-eight patients were treated at the Los Alamos Meson Physics Facility (LAMPF) with negative pi-mesons (pions) between 1974 and 1981.
(14) Progress in the future will center around five primary areas: 1) greater understanding and utilization of radiation sensitizing agents such as hyperbaric oxygen, metronidazol, and other electroaffinic agents, purine and pyrimadine analogs, and antibiotics such as Actinomycin D and Adriamycin; 2) introduction into clinical use of high LET particle beams, such as fast neutrons, pi mesons, low atomic number nuclei, and heavy accelerated nuclei; 3) combined modality therapy utilizing radiation and chemotherapy or radiation and immunotherapy for management of subclinical disease; 4) radiobiologic and clinical advances in the utilization of radiation and hyperthermia; and 5) improved understanding of the pathophysiology and natural history of the gynecologic malignancies with increasing use of staging laparotomies, lymphangiography and peritoneoscopy.
(15) The bean roots have also been irradiated at various points along the depth-dose curve of negative pi-mesons, including the gegion where the pions annihilate on coming to rest.
(16) The multi-disciplinary role of intermediate energy proton accelerators in pure and applied nuclear physics is discussed with particular reference to the experimental programmes at LAMPF (Los Alamos Meson Physics Facility) and SIN (Swiss Institute for Nuclear Research, Zurich).
(17) The macroscopic reaction of the mouse skin was used to derive RBE values for negative pi-Mesons.
(18) The physical characteristics of pi-meson beams are especially favorable.
(19) Pions (negative pi mesons) can be directed to and stopped in a specific area, where they are captured by the nuclei of atoms, rendering the nuclei unstable.
(20) Eighty patients have been treated with Pi-mesons (pions) at TRIUMF between 1979-1984.