Identification of irradiated spices with thermo‐and chemiluminescence measurements

Abstract

Thermoluminescence and chemiluminescence intensities of twenty-nine different spices were measured to determine whether the techniques could be used to detect if spices had been irradiated (10 kGy) and stored after irradiation. In each case it was possible to identify radiation treatment with 10 kGy by at least one of the two methods, if irradiation occurred 2-3 weeks prior to the examination. The luminescence effect from radiation treatment differs from spice to spice. Intensity increases in samples treated with 10 kGy vary between 1 (no effect) and about 1000 times compared with untreated samples. Thermoluminescence proved to be more useful than chemiluminescence, as with most spices radiation treatment could be identified after longer periods of time. A combined or simultaneous use of both techniques assures a rapid identification of radiation treatment in most of the examined spices. With the exception of gzrlic, onions, white and black pepper, the irradiated spices can be identified more than 6 months after irradiation. Some, curcuma, juniper berries, basil, chillis, paprika and celery, show increased luminescence intensities for a year or longer after irradiation.

Phytochemical Characterization of Couch Grass (Cynodon dactylon) and Its Growth Promoting Potential on the Freshwater Prawn Macrobrachium rosenbergii Post-Larvae

“…Quinonines are compounds very much used in pharmacopoeia for the treatment of malaria [48] and more recently of tumors [49]. Quinonines have anti-inflammatory, anti-bacterial and immunomodulating potentials [50]. In the present study, petroleum ether and acetone extracted C. dactylon showed luxurious presence of quinonines, whereas ethanolic extracted C. dactylon showed moderate presence of quinonines (Table 1).…”

(S)-2-(2-Chloroquinolin-3-yl)-2-[(S)-α-methylbenzylamino]acetonitrile

“…Among these, 2-chloro-3-formylquinolines occupy a prominent position as they are key intermediates for further ()-annelation of a wide variety of rings and for various functional group interconversions (Meth-Cohn, 1993). Particular interest in quinoline derivatives arises owing to their biological activity, namely as antibiotics (Jackson & Meth-Cohn, 1995;Kansagra et al, 2000), anti-inflammatories (Schroderet, 1989), anti-tumourals (Joseph et al, 2002)), antioxidants (Laalaoui et al, 2003) and analgesics (Heide et al, 1986;Solomon, 1970). In the same way, -aminoacids are of great biological and economic importance (Williams, 1989).…”

Thermoluminescence parameters and kinetics of irradiated inorganic dust collected from black peppers

“…Thermoluminescence is the emission of light upon release of captured charges from their traps by heating. Quantitative measurement of the emitted TL light following irradiation is an established method in radiation dosimetry (McKeever, Moscovitch, & Townsend, 1995), and has been introduced by Bögl and coworkers for the identiWcation of irradiated food (Heide & Bögl, 1987).…”