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1.
Cryobiology ; 60(2): 235-7, 2010 Apr.
Article in English | MEDLINE | ID: mdl-19895799

ABSTRACT

Cryopreservation of human semen can cause DNA damages, which compromise the fertilization and normal embryo development. The present study showed that the antioxidant resveratrol prevents these damages both in fertile and infertile men. The addition of ascorbic acid before cryopreservation can reduce DNA damages only in infertile men. Although further studies are needed, the present work showed that resveratrol could be considered in human cryopreservation procedures to avoid/minimize DNA damages and preserve sperm integrity.


Subject(s)
Ascorbic Acid/pharmacology , Cryopreservation/methods , DNA Damage/drug effects , Semen Preservation/adverse effects , Semen Preservation/methods , Stilbenes/pharmacology , Adult , Antioxidants/pharmacology , Humans , In Vitro Techniques , Infertility, Male/therapy , Male , Resveratrol
2.
Rev. bras. genét ; 11(3): 563-76, sept. 1988. ilus, tab
Article in English | LILACS | ID: lil-65435

ABSTRACT

O presente trabalho apresenta dados morfológicos e citogenéticos de duas populaçöes de jundiás da família Pimelodidae, pertencente à espécie Rhamdia quelen. Foram observados dois números cromossômicos modais: 58 e 59 devido à presença de um cromossomo supranumerário ou B, que é heterocromático e cuja origem é a de um isocromossomo. Técnicas de impregnaçäo com sais de prata demonstram um par de cromossomos com regiöes NOR, que podem ser variáveis quanto ao tamanho do satélite e da constriçäo secundária


Subject(s)
Animals , Chromosomes , Fishes/genetics , Polymorphism, Genetic , Cytogenetics , Karyotyping , Nucleolus Organizer Region
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