Three species of stannanes were determined in different biological samples obtained from the sea water of the Arabian Gulf. Following digestion with acetonitrile, and extraction with n-hexane, the analytes were derivatized and subsequently analyzed in gas chromatography mass spectrometric system. Five-point calibrations using the concentration range of 0.05-10 μg/g were linear with coefficients...

Several analytical methods have been suggested for the determination of mannosidostreptomycin (streptomycin B) (5, 6). Titus and Fried (6, 12) and Plaut and McCormack,’ who have utilized the quite specific and quite accurate but yet laborious counter-current distribution methods (previously described by Craig) for the isolation and determination of streptomycin B, have noted a number of difficu...

© 2012 Repetto et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Lipid Peroxidation: Chemical Mechanism, Biological Implications and Analytical Deter...

Analytical supercritical fluid extraction (WE) is finding widespread application in the analysis of foodstuffs, agriculturally derived materials, and natural products. The high efficacy that SE demonstrates toward the removal of oils and fats from such matrices makes it a natural technique for the determination of their fat and oil content. In this review, we have highlighted what is essential ...

The demand for energy resources by various systems such as production and transportation, as well as for physical comfort continues to grow apace, intensifying global dependence on fossil fuels and their derivatives. For this reason, numerous private and public programs in several countries have established feasible alternatives for the substitution of petroleum derivatives (Sahin, 2011; Saint ́...

Starch is the most important digestible polysaccharide present in foods and feeds. The starch concentration in cereals cannot be determined directly, because the starch is contained within a structurally and chemically complex matrix. Fine grinding and boiling in dilute HCl are preparative steps necessary for complete release of the starch granules from the protein matrix. Starch can be determi...

One of the actual problems of safe and reliable operation of NPP units with pressurized reactors is the development of tube plugging criterion for steam generator tubing. The basis for plugging criterion development is associated with existence of flaws with critical sizes at steam generator tubes. For effective application of this criterion the conditions of flaw instability should be analyzed...

Submit Manuscript | http://medcraveonline.com Glyphosate is a non-selective herbicide widely used in agriculture, which accounts for over 60% in the global market, providing a wide spectrum of action which enables an optimal control danin has plants [1-4]. Besides, this pesticide has low acute oral toxicity when compared to other herbicidas [5-7]. It is known that pesticide residues are widely ...

Xylitol is a naturally occurring five-carbon containing sugar alcohol. It has attracted a lot of attention in the pharmaceutical, cosmetics, food, and dental industries due to its high sweetening ability, anticariogenic properties and possibilities for use in insulin-dependent diabetics. Thus, the establishment of a simple and rapid method for the determination of xylitol with high selectivity ...

In this study, the permeability of ordered fibrous media towards normal and parallel flow is determined analytically. In this approach, porous material is represented by a ‘‘unit cell” which is assumed to be repeated throughout the media. Several fiber arrangements including: touching and non-touching arrays are considered. Modeling 1D touching fibers as a combination of channel-like conduits, ...