This overview of lateral‐flow immunochromatographic assays covers the development of the first of such tests for pregnancy, their general mode of operation and the role of, and interplay between, their different components. Emerging materials and issues related to the wider range of biofluids these devices are now designed to work with are also discussed. This assay platform has existed for almost 20 years and despite efforts to improve upon it, its ability to produce an accurate and rapid result in the hands of both professional and naïve user 8 will ensure that its spectrum of applicability widens.
A method is described for the controlled adjustment of flour moisture level over the range 1660%. Water was added as powdered ice to flour dispersed in liquid nitrogen thereby avoiding the introduction of mechanical work. The effect of moisture on the distribution of free and bound lipids in a hard wheat flour was investigated using this technique.Free lipid decreased above 20% moisture, while extractable bound lipid increased only above 25% moisture. These different critical moisture levels are considered with reference to the distribution of neutral and polar lipid fractions in the moistened flour.
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