Trace elemental content of biological materials

1990 ◽  
Vol 26-27 (1) ◽  
pp. 177-187 ◽  
Author(s):  
Neil I. Ward ◽  
Fadi R. Abou-Shakra ◽  
Steven F. Durrant
Keyword(s):  
Biological Materials ◽  
Elemental Content ◽  
Trace Elemental

Trace Elemental Content of Biological Materials

1990 ◽  
pp. 177-187 ◽  
Author(s):  
Neil I. Ward ◽  
Fadi R. Abou-Shakra ◽  
Steven F. Durrant
Keyword(s):  
Biological Materials ◽  
Elemental Content ◽  
Trace Elemental

Serum Trace Elemental Content of Tongue Cancer Patients Using Particle Induced X-Ray Emission Technique

2014 ◽  
Vol 20 (3) ◽  
pp. 882-884 ◽  
Author(s):  
P. Sarita ◽  
G. J. Naga Raju ◽  
M. Ravi Kumar ◽  
B. G. Naidu ◽  
T. R. Rautray ◽  
...  
Keyword(s):  
Cancer Patients ◽  
Tongue Cancer ◽  
Elemental Content ◽  
X Ray ◽  
Trace Elemental

Preparation and characterization of purified Na-activated bentonite from Karak (Pakistan) for pharmaceutical use

Clay Minerals ◽  
2013 ◽  
Vol 48 (4) ◽  
pp. 595-603 ◽  
Author(s):  
L. A. Shah ◽  
N. S. Khattak ◽  
M. G. S. Valenzuela ◽  
A. Manan ◽  
F. R. Valenzuela Díaz
Keyword(s):  
Elemental Content ◽  
X Ray Diffraction ◽  
Sodium Bentonite ◽  
E Coli ◽  
Trace Elemental ◽  
Activated Bentonite ◽  
Sedimentation Volume ◽  
Swelling Volume ◽  
Calcium Bentonite

AbstractThe purpose of this paper was to prepare purified Na- bentonite with improved properties for use in the pharmaceutical industry. Calcium bentonite from the Shagia region of Karak district, Pakistan, was activated with various proportions of sodium carbonate (2, 3, 5 and 8 wt.%) and purified by sedimentation to remove impurities, especially quartz. X-ray diffraction (XRD), and swelling volume confirmed the conversion of raw bentonite to sodium bentonite by using 5% Na2CO3. The sodium bentonite (K5) obtained by activation met the chemical and microbiological requirements set by the pharmacopeias regarding the toxic trace elemental content (Pb and As), absence of E. coli, total aerobic microbial contents and physicochemical properties such as swelling volume, pH and sedimentation volume. Therefore K5 bentonite could be designated as potentially suitable for pharmaceutical applications. The CEC, surface area, porosity, pH, gel formation and swelling volume indicated that K5 bentonite could be used in the formulation of oral suspension and in topical application.

scholarly journals The Review of Nuclear Microscopy Techniques: An Approach for Nondestructive Trace Elemental Analysis and Mapping of Biological Materials

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Stephen Juma Mulware
Keyword(s):  
Elemental Analysis ◽  
Biological Materials ◽  
Nuclear Microprobe ◽  
Elemental Distribution ◽  
Relative Level ◽  
Trace Elemental Analysis ◽  
Data Collection And Analysis ◽  
Trace Elemental ◽  
Microscopy Techniques ◽  
Physical And Chemical

The properties of many biological materials often depend on the spatial distribution and concentration of the trace elements present in a matrix. Scientists have over the years tried various techniques including classical physical and chemical analyzing techniques each with relative level of accuracy. However, with the development of spatially sensitive submicron beams, the nuclear microprobe techniques using focused proton beams for the elemental analysis of biological materials have yielded significant success. In this paper, the basic principles of the commonly used microprobe techniques of STIM, RBS, and PIXE for trace elemental analysis are discussed. The details for sample preparation, the detection, and data collection and analysis are discussed. Finally, an application of the techniques to analysis of corn roots for elemental distribution and concentration is presented.

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