Read e-book online Alicyclobacillus spp. in the Fruit Juice Industry: History, PDF

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By Su-Sen Chang; Dong-Hyun Kang

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Extra info for Alicyclobacillus spp. in the Fruit Juice Industry: History, Characteristics, and Current Isolation/Detection Procedures

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This is because the concentration of pulp components is increased by such extraction techniques. It is thus debatable to what extent the Israeli figures really conflict with those of Petrus and Attaway. The fluorescence spectra serve to confirm the presence of pulp wash. Several differences in both excitation and emission spectra of pulp wash and orange juice have been summarised (Petrus and Attaway, 1985). The main effect of pulp wash presence is the appearance of a peak in the excitation spectrum at 302nm, a diagnostic feature confirmed by Brause et al.

It seems likely that PMF analysis may have a future if peel by-products are used to sophisticate juice. However, the measurement of PMFs will contribute little to the detection of conventional adulteration because their characteristic pattern will be preserved on mere dilution and the addition of sugars and acid. 1 Introduction and the Gaussian distribution The purpose of this section is to show the role of statistical analysis in orange juice authentication, and to describe how that role has increased in importance.

One recent exception is the pioneering work of Aries et al. (1986). These workers recognised the practical difficulties of acquiring large amounts of conventional analytical data and proposed a novel solution. Pyrolysis-mass spectrometry is an analytical fingerprinting technique. It requires thermal decomposition of a sample in an inert atmosphere under controlled conditions. This yields an array of volatiles, characteristic of the original sample. Mass spectrometry of these volatiles is then carried out by passing the pyrolysis products to the ion source of a mass spectrometer.

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Alicyclobacillus spp. in the Fruit Juice Industry: History, Characteristics, and Current Isolation/Detection Procedures by Su-Sen Chang; Dong-Hyun Kang

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