Results 261 to 270 of about 259,540 (309)
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Centromeres of human chromosomes
Environmental and Molecular Mutagenesis, 1996The centromere, recognized cytologically as the primary constriction, is essential for chromosomal attachment to the spindle and for proper segregation of mitotic and meiotic chromosomes. Considerable progress has been made in identifying both DNA and protein components of the centromere and kinetochore complex in mammalian chromosomes, including ...
B A, Sullivan, S, Schwartz, H F, Willard
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Archives of Pediatrics & Adolescent Medicine, 1961
The purpose of this paper is to present a nonencyclopedic review of this rapidly growing field. The focus will be on the new methodologies involved, their accomplishments, their limitations, and their potentialities, in the hope of enabling the reader to examine with more understanding the many publications appearing in the clinical literature on the ...
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The purpose of this paper is to present a nonencyclopedic review of this rapidly growing field. The focus will be on the new methodologies involved, their accomplishments, their limitations, and their potentialities, in the hope of enabling the reader to examine with more understanding the many publications appearing in the clinical literature on the ...
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Archives of General Psychiatry, 1972
A cytogenic study of 16 opiate addicts receiving methadone hydrochloride compared with a control population revealed an unusual number of chromosome aberrations including dicentric chromosomes and an exchange figure at 72 hours in the addicted group, but no significant increase in chromosome anomalies over the controls at 48 hours. To determine whether
A, Falek +4 more
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A cytogenic study of 16 opiate addicts receiving methadone hydrochloride compared with a control population revealed an unusual number of chromosome aberrations including dicentric chromosomes and an exchange figure at 72 hours in the addicted group, but no significant increase in chromosome anomalies over the controls at 48 hours. To determine whether
A, Falek +4 more
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Heteropycnosis in Human Chromosomes
Nature, 1950INVESTIGATORS of human chromosomes noticed many years ago the presence of two chromatic masses or chromocentres in resting nuclei. On the other hand, Schultz1 was able to analyse in male human material the structure of a couple of elements pairing at pachytene during spermatogenesis, each spatially connected with a nucleolus, and, therefore, called ...
C, BARIGOZZI, P, FELETIG
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Chromosome Abnormalities in Human Sperm
1985The ability to analyze human sperm chromosome complements after penetration of zona pellucida-free hamster eggs provides the first opportunity to study the frequency and type of chromosomal abnormalities in human gametes. Two large-scale studies have provided information on normal men.
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