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Molecular biology
A term of art for chromosome fragments which are not incorporated into the nucleus at the time of cell division.

The smaller nucleus in ciliate protozoans (e.g., Paramecium).


(mī-krō-nū′klē-ŭs) plural.micronuclei [″ + L. nucleus, kernel]
1. A small nucleus.
2. The smaller of the two nuclei of ciliated protozoa; it contains the chromosomes.
References in periodicals archive ?
Results of the unpaired t test showed that the mean epithelial micronuclei occurrences of the school children at both study areas were not significantly different (p > 0.
Measurement of micronuclei in human lymphocytes Mutat Res 1983; 148 : 29-36.
Micronuclei as an index of cytogenetic damage: past, present and future.
Determination of diesel genotoxicity in firebreathers by micronuclei and nuclear abnormalities in buccal mucosa.
She discussed an ongoing study of 82 patients with oral leukoplakia who underwent micronuclei and chromosomal assays and then were treated with 4-5 cups a day of black tea daily for 1 year (J.
Exercise-induced DNA effects in human leukocytes are not accompanied by increased formation of 8-hydroxy-2'-deoxyguanosine or induction of micronuclei.
4-fold increase in micronuclei frequencies per 1,000 cells, from 3.
In humans, structural chromosomal aberrations, micronuclei, or sister chromatid exchanges have been induced in cultured human blood lymphocytes (9,37,38).
He incubated human cells with extracts of cigarette smoke and then scanned the cells for fragments called micronuclei, which are evidence of precancerous genetic changes.
And seven of the women had a larger number of components called micronuclei in their white blood cells.
Both simultaneous and prior administration of the vegetable juices reduced the cyclophosphamide-induced micronuclei significantly in the treated animals.
Haskins' 90-minute presentation will cover: high-content screening; formation and importance of micronuclei and the need for automation in analyzing these; an overview of a novel in vitro micronucleus assay; and incorporation of genotoxicity with cytotoxicity for screening evaluation.