The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; or higher energy X-rays. Identification of ELEMENTS by this technique is based on the specific type of X-rays that are emitted which are characteristic of the specific elements in the material being analyzed. The characteristic X-rays are distinguished and/or quantified by either wavelength dispersive or energy dispersive methods
Proton magnetic resonance -- Tables. : Nuclear states from charged particle reactions. Subvolume A, Tables of proton and [alpha]-particle resonance parameters / [contributors], S.I. Sukhoruchkin, Z.N. Soroko ; edited by H. Schopper
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques
The part of a cell that contains the CYTOSOL and small structures excluding the CELL NUCLEUS; MITOCHONDRIA; and large VACUOLES. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)
Protostars -- Congresses : Protostars and planets VI / edited by Henrik Beuther, Ralf S. Klessen, Cornelis P. Dullemond, and Thomas Henning ; with the assistance of Renee Dotson ; with 250 collaborating authors
Prototracheata. : Guide to the Arachnida, millipedes, and centipedes, exhibited in the Department of zoology, British museum (Natural history) / with 34 illustrations in the text and 3 coloured plates
Prototroctes maraena. : A review of biological information distribution and status of the Australian grayling Prototroctes maraena Gunther in Victoria / P.D. Jackson and J.D. Koehn
1988
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Prototyp : Prototype : design and craft in the 21st century / edited by Louise Valentine