Energy-dispersive X-ray microanalysis of the bone mineral content in human trabecular bone: A comparison with ICPES and neutron activation analysis

1994 ◽  
Vol 55 (3) ◽  
pp. 236-239 ◽  
Author(s):  
K. Åkesson ◽  
M. D. Grynpas ◽  
R. G. V. Hancock ◽  
R. Odselius ◽  
K. J. Obrant
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Bone Mineral Content ◽  
Trabecular Bone ◽  
Bone Mineral ◽  
Mineral Content ◽  
Energy Dispersive ◽  
X Ray ◽  
Human Trabecular Bone

Mineral analyses of storage reserves of Cucurbita maxima and Cucurbita andreana pollen

1992 ◽  
Vol 70 (3) ◽  
pp. 491-495 ◽  
Author(s):  
Hilary R. Skilnyk ◽  
John N. A. Lott
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Energy Dispersive ◽  
Specimen Preparation ◽  
Cucurbita Maxima ◽  
X Ray ◽  
Thin Sectioning ◽  
Major Loss ◽  
Storage Reserves

Cucurbita maxima and Cucurbita andreana are so closely related that hybridization is possible. These two species also have been shown to have very different levels of calcium storage in their seeds. Our neutron activation analysis studies have shown that the total amount of P, Ca, K, and Mg in pollen of the two species was similar. Energy dispersive X-ray analysis studies also showed that the composition of electron-dense particles in the tube cells of the two species was similar. Thus the differences in Ca levels in phytate reserves in the seeds of these two Cucurbita species do not appear to be paralleled by differences in mineral reserves in the pollen of the two species. Specimen preparation studies demonstrated that even though elements such as P, K, Mg, and Ca are mostly retained by an anhydrous fixation and embedding protocol, thin-sectioning of such blocks on a water-filled microtome boat resulted in major loss of elements. Key words: pollen, mineral nutrients, energy dispersive X-ray analysis, neutron activation analysis, phytate, Cucurbita.

A Fast, Versatile X-ray Fluorescence Method for Measuring Tin in Impregnated Wood

1984 ◽  
Vol 28 ◽  
pp. 155-160 ◽  
Author(s):  
Iver Drabæk ◽  
Leif Højslet Christensen
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Tin Oxide ◽  
Fluorescence Method ◽  
Energy Dispersive ◽  
Fundamental Parameter ◽  
X Ray ◽  
Precision And Accuracy ◽  
Impregnated Wood

AbstractThe present paper describes an energy-dispersive x-ray fluorescence method for measuring tin in bis(tri-n-butyl)tin-oxide impregnated wood. The proposed method is of the backscatter/fundamental parameter type. Its versatility, precision, and accuracy is demonstrated by analyses of eleven samples of sapwood of Baltic Redwood. The results obtained are compared with those from neutron activation analysis.

A histological and elemental analysis study of the mature seed of Begonia semperflorens

1991 ◽  
Vol 69 (10) ◽  
pp. 2165-2169 ◽  
Author(s):  
M. M. West ◽  
J. N. A. Lott
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Protein Body ◽  
Lipid Vesicles ◽  
Energy Dispersive ◽  
Protein Bodies ◽  
X Ray ◽  
Whole Seed ◽  
Begonia Semperflorens

The total element content and the subcellular distribution of mineral nutrients were investigated in a species that has very minute seeds. The major storage substances in the seed of Begonia semperflorens were lipids sequestered in lipid vesicles and proteins concentrated in protein bodies. Transmission electron microscopy revealed the presence of protein crystalloids and electron-dense globoid crystals in the protein bodies. These inclusions varied both in size and number in protein bodies from different tissues. Energy dispersive X-ray analysis of the globoid crystals showed the high Mg, K, and P levels characteristically found in phytin from large-sized seeds. Small traces of Ca were found in globoid crystals within protein bodies found in the provascular tissue of the embryo. Neutron activation analysis was used to measure the elemental composition of the whole seed and these results were correlated with the findings of energy dispersive X-ray analysis studies of globoid crystals. Key words: Begonia seed, energy dispersive X-ray analysis, protein body, globoid crystal, protein crystalloid, neutron activation analysis.

Sign in / Sign up

Export Citation Format

Share Document