Abstract.-The so-called "Oddy test" has gained popularity in art and archaeology collections because it is inexpensive to use, and the results are relatively easy to analyze. However, the method is also subjective and does not identify the pollutants. Here we present a modification to the traditional test that addresses these drawbacks and aims at providing solutions. Activated carbon was used to adsorb the volatile emissions generated within the standard Oddy test setup. Gas chromatographymass spectrometry (GC-MS) analysis of the volatile organic compounds (VOCs) desorbed from the activated carbon detected pollutants within a considerably shorter time frame than the traditional Oddy test and provided both qualitative and quantitative data. GC-MS analysis of volatiles offgassed during the Oddy test provided information about the VOCs from local brands of materials commonly used for conservation and storage of objects in collections. The use of GC-MS analysis of volatiles improves the Oddy test in a fast, sensitive, and quantitative manner.
An inscription in early Canaanite script from Lachish, incised on an ivory comb, is presented. The 17 letters, in early pictographic style, form seven words expressing a plea against lice.
The glutamic-pyruvic transaminase (GPT) activity in the ovary and uterus of rats was examined after serum and chorionic gonadotrophin stimulation. These gonadotrophins were found to increase considerably the GPT activity in the above mentioned tissues. This effect of gonadotrophins was tested with different doses of gonadotrophins, at increasing intervals after a single injection and under different physiological conditions (vitamin B6 deficiency, hypothyroidism and inanition), and subsequently compared with the effect of gonadotrophins on glutamicoxalacetic transaminase (GOT). Such comparisons showed that these two enzymes behaved differently under all the experimental conditions investigated. The possible significance of the gonadotrophin stimulating effect in transaminase activity is discussed.
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