𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The fate of labelled insecticide residues in food products. I.—Studies with a radioactive bromine analogue of DDT

✍ Scribed by F. P. W. Winteringham; A. Harrison; C. R. Jones; J. L. McGirr; W. H. Templeton

Publisher
John Wiley and Sons
Year
1950
Tongue
English
Weight
832 KB
Volume
1
Category
Article
ISSN
0022-5142

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A radioactive bromine analogue, 1:1:1‐trichloro‐2:2‐di‐(4‐bromophenyl)ethane, of the insecticide DDT has been used to indicate the fate of DDT sprayed on to wheat grain which is subsequently milled, baked and fed to animals. ^82^Br of high specific activity was prepared in the Harwell pile by the Szilard‐Chalmers method and was used for the synthesis of the analogue. Grain carrying 402 p.p.m. of the labelled insecticide was milled under typical conditions. A concentration of 14.6 p.p.m. was found in the flour (85% extraction) and 11.2 p.p.m. in bread made from the flour. There was evidence that some of the insecticide was in a ‐combined form in the bread. Some of the grain and bread were fed to hens and rats respectively. The insecticide was found in all the tissues examined. A fraction of the radioactivity found in the excreta behaved as the di‐(4‐bromo‐phenyl)acetic acid metabolite. This metabolite was identified in the urine of a man following ingestion of some of the bread.

📜 SIMILAR VOLUMES

The fate of labelled insecticide residue
The fate of labelled insecticide residues in food products. V.—The nature and significance of ethylene dibromide residues in fumigated wheat
✍ R. G. Bridges 📂 Article 📅 1956 🏛 John Wiley and Sons 🌐 English ⚖ 727 KB

## Abstract Ethylene dibromide labelled with bromine‐8~2~ has been used to study the absorption and decomposition of ethylene dibromide in wheat under the conditions of fumigation and on subsequent airing and heating. In spite of the high physical sorption of the fumigant and its slow rate of airin

The fate of labelled insecticide residue
The fate of labelled insecticide residues in food products. III. —N-methylation as a result of fumigating wheat with methyl bromide
✍ R. G. Bridges 📂 Article 📅 1955 🏛 John Wiley and Sons 🌐 English ⚖ 666 KB

## Abstract The principal reaction between ^14^C‐labelled methyl bromide and the nitrogen‐containing groups of wheat protein has been shown, by combined radioactive tracer‐chromatographic techniques, to be with the histidine residue. Three methylated histidines are present in the hydriodic acid hyd

The fate of labelled insecticide residue
The fate of labelled insecticide residues in food products. IV. —The possible toxicological and nutritional significance of fumigating wheat with methyl bromide
✍ F. P. W. Winteringham 📂 Article 📅 1955 🏛 John Wiley and Sons 🌐 English ⚖ 585 KB

## Abstract The major products of the chemical reactions between methyl bromide and the constituents of wheat under the conditions of fumigation have been characterized or identified. Their rate of absorption by an adult human consuming fumigated flour products has been estimated. The likely nature