Results 181 to 190 of about 2,001 (220)

MICRO-PIXE RECONNAISSANCE OF ALLANITE AS A PRASEODYMIUM SOURCE

International Journal of PIXE, 1996
Praseodymium is one of the most important pigment materials for high-quality china and ceramics but its source minerals are not well known to geologists. Allanite, one of the REE-bearing minerals in nature, has a large coordination polyhedra for cations and favors the larger LREE ions such as praseodymium than other REE-bearing minerals that favor the
SATOSHI MURAO, KAZUO NAKASHIMA, SOEY H SIE   +2 more
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Micro-PIXE and PIGE analysis of individual fluid inclusions

Radiation Physics and Chemistry, 1996
Abstract Using the high resolution microprobe which combines PIXE with PIGE measurements, components of trapped fluids can be measured without opening individual inclusions. It is a useful tool for nondestructive all elements' analysis. Micro-PIXE was used to detect the Z > 13 elements and the fluorine concentration was analyzed with micro-PIGE ...
null Shijun Zhou, null Chigang Ren, null Zhuoran Lin, null Fujia Yang   +3 more
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Micro-PIXE Analysis of Trace Elements in Sulfides

AIP Conference Proceedings, 2003
Micro‐scale Proton‐induced X‐ray Emission (PIXE) of trace elements (TE) in sulfides provides insights into geologic processes including magmatic system evolution, ore forming events, and fluid‐flow processes. The Los Alamos nuclear microprobe was used to determine TE concentrations and ratios in sulfides from diverse geologic environments including ...
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Micro-PIXE in plant sciences: Present status and perspectives

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2002
Fundamental processes of plant physiology are affected or regulated by mineral nutrients. Hence understanding the mechanisms of nutrient uptake and their functions in plant metabolism is of fundamental importance in both basic and applied plant studies.
Jolanta Mesjasz-Przybyłowicz, Wojciech J. Przybyłowicz   +1 more
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Micro-PIXE studies on gallium incorporation in mineralized tissue

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001
The influence of gallium ions on the development of the mineralization process in a cell culture model was investigated. To determine the elemental composition the proton microprobe in combination with proton induced X-ray emission (micro-PIXE) and energy-dispersive X-ray fluorescence (XRF) were used.
Rokita, E., Korbas, M., Mutsaers, P.H.A., Taton, G., de Voigt, M.J.A.   +4 more
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MICRO-PIXE STUDIES OF MINERALIZED TISSUES – A QUANTITATIVE APPROACH

International Journal of PIXE, 1994
A method of quantitative analysis of bone samples by simultaneous measurements of proton induced X-ray emission (PIXE) and Rutherford backscattered (RBS) spectra is described. The method is used for the evaluation of the data collected during proton microprobe irradiation. The RBS spectra are used for the determination of the sample thickness.
E. ROKITA, A. WROBEL, F. MUNNIK, P.H.A. MUSTSAERS, M.J.A. de VOIGT   +4 more
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Elemental imaging of rat epididymis by micro-PIXE analysis

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003
Abstract The epididymis, a male reproductive organ, which is a highly convoluted duct, plays an important role in transportation of spermatozoa, their maturation, and their storage. Although major elements, such as P, S and K, as well as trace elements, such as Mn, Cu, Zn, Se, are known to be essential for spermatogenesis, detailed distributions of ...
S. Homma-Takeda, Y. Nishimura, Y. Watanabe, H. Imaseki, M. Yukawa   +4 more
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Micro-PIXE analysis of impurities in bow-tie trees

[Proceedings] 1992 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, 2003
The impurity distributions in the core, wings, and the XLPE (cross-linked polyethylene) insulation surrounding six bow-tie trees found in a 25-kV underground cable were analyzed by scanning micro-PIXE (proton induced X-ray emission) using a focused 0.75-MeV proton beam.
A. Houdayer, P.F. Hinrichsen, W.J. Teesdale, J.-L. Parpal, J.-P. Crine   +4 more
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New in-air micro-PIXE system for biological applications

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2005
Two unique apparatuses have been installed at in-air micro-PIXE system at JAERI Takasaki. One is a multiple X-ray detection system that consists of three X-ray detectors. The efficiency below 2 keV is greatly improved by a new high energy resolution Si(Li) detector, on the other hand higher energy region above 6 keV is covered by a backward X-ray ...
T. Sakai, M. Oikawa, T. Sato, T. Nagamine, H.D. Moon, K. Nakazato, K. Suzuki   +6 more
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Micro-PIXE study of metal loss from dental amalgam

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2017
Abstract Mercury amalgams have been a topic of controversy ever since their introduction over 150 years ago as a dental material. An interesting question is if metals are released from the amalgam into the enamel and dentine tissue. To elucidate this PIXE mapping was used to investigate metal redistribution in an extracted molar tooth with a ∼30 year
Ridthee Meesat, Wanwisa Sudprasert, Edouard Guibert, Liping Wang, Thibault Chappuis, Harry J. Whitlow   +5 more
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