Buscar
Mostrando ítems 61-70 de 16851
Screening and characterization of sex-specific DNA fragments in the freshwater fish matrinch, Brycon amazonicus (Teleostei: Characiformes: Characidae)
(Springer, 2012-10-01)
The matrinch Brycon amazonicus, a commercially important freshwater fish resource, has no heteromorphic sex chromosomes so far described. In the present study, we performed a screening of sex-associated DNA markers in this ...
The effects of male age on sperm DNA damage in an infertile population
(2007-11-01)
The objective was to investigate the influence of age on sperm DNA damage. Semen samples were collected from 508 men in an unselected group of couples attending infertility investigation and treatment. DNA fragmentation ...
The effects of male age on sperm DNA damage in an infertile population
(2007-11-01)
The objective was to investigate the influence of age on sperm DNA damage. Semen samples were collected from 508 men in an unselected group of couples attending infertility investigation and treatment. DNA fragmentation ...
Taxonomic and phylogenetic relationships between neotropical species of ticks from genus Amblyomma (Acari: Ixodidae) inferred from second internal transcribed spacer sequences of rDNA
(2007-03-01)
The accurate specific identification of ticks is essential for the study, control and prevention of tick-borne diseases. Herein, we determined ribosomal nucleotide sequences of the second internal transcribed spacer (ITS2) ...
Taxonomic and phylogenetic relationships between neotropical species of ticks from genus Amblyomma (Acari: Ixodidae) inferred from second internal transcribed spacer sequences of rDNA
(2007-03-01)
The accurate specific identification of ticks is essential for the study, control and prevention of tick-borne diseases. Herein, we determined ribosomal nucleotide sequences of the second internal transcribed spacer (ITS2) ...
Intrinsically bent DNA sites in the Drosophila melanogaster third chromosome amplified domain
(SPRINGER HEIDELBERG, 2009)
Bent DNA sites promote the curvature of DNA in both eukaryotic and prokaryotic chromosomes. Here, we investigate the localization and structure of intrinsically bent DNA sites in the extensively characterized Drosophila ...
Medida da elasticidade entrópica de uma molécula de DNA
(Universidade Federal de Minas GeraisUFMG, 2001-03-13)
In this work we combine optical tweezer and videomicroscopy techniques to obtain the entropic elastic behavior of single ¸ phage DNA molecules. By tethering a single DNA molecule by one end to a 3¹m poliestirene bead and ...
Analysis of DNA damage induced by aflatoxin B1 in Dunkin-Hartley guinea pigs
(2007-05-01)
Aflatoxin B1 (AFB1) is among the most potent naturally occurring carcinogens and classified as a group I carcinogen. Since the ingestion of aflatoxin-contaminated food is associated with several liver diseases, the aim of ...