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An improved method was developed for simultaneous determination of the fortified forms of thiamine (B1), riboflavin (B2), nicotinamide and nicotinic acid (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), and folic acid (B9) in infant formulas and related nutritionals. The method employed a simple, effective, and rapid sample preparation followed by liquid chromatography tandem mass spectrometry...
Two methods for the covalent immobilization of single-stranded DNA onto optical fibers for the development of biosensors are reported. In the first method, fused silica optical fibers were derivatized with γ-amino-propyltriethoxysilane (APTES) followed by extension with 12-nitrododecanoic acid via amide formation. The terminal nitro moiety was then reduced to an amine to provide a hydrophobic spacer...
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