An analysis of the optics of a field ionization ion source for application with a scanning proton microprobe

1992 ◽  
Vol 63 (12) ◽  
pp. 5653-5660 ◽  
Author(s):  
R. A. Colman ◽  
G. L. Allan ◽  
G. J. F. Legge
Keyword(s):  
Ion Source ◽  
Field Ionization ◽  
Proton Microprobe ◽  
Scanning Proton Microprobe

The Oxford scanning proton microprobe

1994 ◽  
Vol 31 (6) ◽  
pp. 187
Author(s):  
Jacqueline Koay ◽  
Geoffrey W. Grime
Keyword(s):  
Proton Microprobe ◽  
Scanning Proton Microprobe

Distribution of Copper and Other Elements in Ryegrass Roots, Determined With a Scanning Proton Microprobe

1983 ◽  
Vol 10 (2) ◽  
pp. 153 ◽  
Author(s):  
AP Mazzolini ◽  
JJ Jeffery ◽  
NC Uren ◽  
GJF Legge
Keyword(s):  
Proton Microprobe ◽  
Scanning Proton Microprobe ◽  
Wimmera Ryegrass ◽  
Solution Cultures

A scanning proton microprobe has been used to determine the distribution of Cu and other elements in Wimmera ryegrass roots grown in solution cultures. Cu was found to be localized on or near the surface of the roots, in randomly distributed discrete zones. The distribution of Cu was partially correlated with those of Fe, P and Ca and possibly indicates some form of association; coprecipitation in a precipitate of Fe(III) phosphate or hydroxyoxide is favoured.

scholarly journals External Scanning Proton Microprobe

2005 ◽  
Vol 6 (1) ◽  
pp. 69-71 ◽  
Author(s):  
T. Sakai ◽  
M. Oikawa ◽  
T. Sato
Keyword(s):  
Proton Microprobe ◽  
Scanning Proton Microprobe

RECENT BIOMEDICAL APPLICATIONS OF THE OXFORD SCANNING PROTON MICROPROBE

1999 ◽  
Vol 09 (03n04) ◽  
pp. 199-216 ◽  
Author(s):  
GEOFFREY W. GRIME ◽  
EVA PÅLSGÅRD ◽  
ELSPETH F. GARMAN ◽  
MARTA UGARTE ◽  
DAVID POTTAGE ◽  
...  
Keyword(s):  
Trace Element ◽  
Metal Binding ◽  
Active Sites ◽  
Trace Element Analysis ◽  
X Ray Diffraction ◽  
Element Analysis ◽  
Proton Microprobe ◽  
Scanning Proton Microprobe ◽  
Leaf Cutting

The Oxford Scanning Proton Microprobe continues to be used in the field of trace element measurement in biological systems, exploiting the unique advantages of sensitive, quantitative trace element analysis using PIXE, high spatial resolution and the long penetrating power of MeV protons. This paper outlines a number of recent applications which highlight these advantages. These include: (a) Analysing the distribution of metals in the pupae of leaf-cutting ants to determine the storage sites and transport mechanism of metals used to harden the edges of the mandibles. (b) A study of the distribution of zinc in the retina of rats to determine the role of zinc in light and dark adaptation of the eye. (c) The analysis of crystals of proteins and other large organic molecules prepared for structure determination using x-ray diffraction. These often contain metal atoms, and the identity and concentration of the metal is an important diagnostic for determining the nature of the protein and the quality of the crystallisation. The crystals are normally small (~100μm) and so microPIXE is being used to characterise them. This technique has wide ranging applications, including qualitative and quantitative identification of metals in reaction centres, in active sites and in metal binding proteins, and of DNA or RNA bound to proteins.

Microanalysis of ore-forming fluids using the scanning proton microprobe

1995 ◽  
Vol 104 (1-4) ◽  
pp. 182-190 ◽  
Author(s):  
C.G. Ryan ◽  
C.A. Heinrich ◽  
E. van Achterbergh ◽  
C. Ballhaus ◽  
T.P. Mernagh
Keyword(s):  
Proton Microprobe ◽  
Scanning Proton Microprobe
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