M 14C-labeled

On the other hand, j8 particles from 14C will travel, on average, 10/m through emulsion, and so a thicker layer of emulsion while reducing resolution has the effect of increasing the number of grains produced. This has been made use of in double label techniques where DNA has been labelled with tritiated and 14C-labelled 

Durall D. M., Todd A. W., and Trappe J. M. (1994) Decomposition of 14C-labelled substrates by ectomycor-rhizal fungi in association with Douglas fir. New Phytol 127(4), 725-729. 

Wang, W. H., Bray, M. C., and Jones M. N. (1999). The fate of 14C-labelled humic substances in rice cells in culture. J. Plant Physiol. 154, 203-211. 

WeiB M et al., Fate and stability of 14C-labeled 2,4,6-trinitrotoluene in contaminated soil following microbial bioremediation processes, Environ. Toxicol. Chem., 23, 2049, 2004. 

Y. Iimura, M. Mishima, H. Sugimoto, Synthesis of l-benzyl-4-[(5,6-dimethoxy [2-14C]-l-indanon)-2-yl]-methylpiperidine hydrochloride (E2020-14C), J. Label. Comp. Radio-pharm. XXVI (1989) 835-839. 

The recovery of trimethylsilyl and trifluoroacetyl derivatives has been examined by use of 14C-labelled sugars, and it has been shown that glucose trifluoroacetate is recovered208 to the extent of 3 to 5% on SF-96, or of 5 to 14% on Carbowax 20 M. 

Vaughan, D., Cheshire, M. V., and Mundie, C. M. (1974b). Uptake by beet root tissue and biological activity of 14C-labelled fractions of soil organic matter. Biochem. Soc. T. 2, 126-129. 

Melancon, M.J. and Lech, JJ. Uptake metabolism and elimination of 14C-labeled 1,2,4-trichlorobenzene in rainbow trout and carp, J. Toxicol. Environ. Health, 6(3) 645-658, 1980. 

Figure 6. Chromatographic pattern for carp liver microsomal 14C-labeled organo-soluble metabolites of [ring-14C]-molinate. Incubation was conducted under standard conditions for one hr m number represents metabolite code.

The biosynthesis of terpenoid indole alkaloids from tryptophan has long been known.1,2 In new experiments with DL-[2-14C,2, 3 - 3C2]tryptophan [as (94)], this has been confirmed for vindoline (106).35 Incorporation measured by assay for radioactivity and by n.m.r. spectroscopy was the same, thus indicating an intact incorporation (with loss, of course, of the carboxy-group) (for discussion of the particular application of 13C labelling used here, see pp. 1-2). 

C. D. DiVincenzo, M. L. Hamilton, C. J. Kaplan, J. Dedinas, Metabolic Fate and Disposition of 14C-Labeled Methyl w-Butyl Ketone in the Rat , Toxicol. Appl. Pharmacol. 

Schiavon, M. 1988a. Studies of the leaching of atrazine, of its chlorinated derivatives, and of hydroxyatrazine from soil using 14C ring-labeled compounds under outdoor conditions. Ecotoxicol. Environ. Safety 15 46-54. 

P. A. Cossum, H. Sasmor, D. Dellinger, L. Truong, L. Cummings, S. R. Owens, P. M. Markham, J. P. Shea, S. Crooke, Disposition of the 14C-Labeled Phosphorothioate Oligonucleotide ISIS 2105 after Intravenous Administration to Rats ,./. Pharmacol. Exp. Ther. 1993, 267, 1181-1190. 

Crooke, S.T., L.R. Grillone, A. Tendolkar, A. Garrett, M.J. Fratkin, J. Leeds, and W.H. Barr. 1994. A pharmacokinetic evaluation of 14C-labeled afovirsen sodium in patients with genital warts. Clin. Pharmacol. Ther. 56 641—646. 

Recently Inamoto and Simamura [74] investigated the interaction of 1-cyano-1-methylethyl radicals and various nitro compounds (nitrobenzene, m- dinitrobenzene, nitromethane, tetranitromethane) and Bevington and Ghanem [84] have studied the effects of picric acid and m- dinitrobenzene on the sensitized radical polymerization of styrene. Picric acid proved to be a rather inefficient inhibitor, in- dinitrobenzene was found to be a polymerization retardant. By using 14C-labelled specimens of the nitro compounds the authors determined the amounts of nitro compounds incorporated in the polymer. The average number of retardant molecules per polymer molecule was found to be 0.5-0.7. 

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