7 research outputs found

    Distributed Multimedia Learning Environments: Why and How?

    Full text link

    Efeito da adi莽茫o de trolox e pentoxifilina na motilidade, integridade do acrossoma e do DNA de espermatozoides equinos ap贸s descongela莽茫o Effect of trolox and pentoxifylline on motility and integrity of, acrossome and DNA of equine spermatozoa after thawing

    No full text
    Tr锚s garanh玫es foram utilizados para estudar o efeito da adi莽茫o de trolox e pentoxifilina na motilidade, integridade do acrossoma e DNA de espermatozoides p贸s-descongela莽茫o. Para congela莽茫o, utilizou-se Tris-gema com glicerol (5%) em m谩quina de congela莽茫o de s锚men. As amostras foram descongeladas a 37潞C durante 30 segundos e tratadas com: T1= 150碌L de s锚men + 150碌L de Tris; T2= 150碌L de s锚men + 150碌L de Tris + 120碌M/mL de trolox; T3= 150碌L de s锚men + 150碌L de Tris + 3,5mM de pentoxifilina e T4= 150碌L de s锚men + 150碌L de Tris + 3,5mM de pentoxifilina + 120碌M/mL de trolox. Ap贸s 0, 60 e 120 minutos de incuba莽茫o (37潞C), as amostras foram analisadas quanto 脿 motilidade, vigor, integridade de acrossoma e DNA. N茫o houve diferen莽a (P>0,05) entre tratamentos ap贸s 0 e 60 minutos de incuba莽茫o em todos os par芒metros estudados. Ap贸s 120 minutos de incuba莽茫o, verificou-se maior porcentual (P<0,05) de c茅lulas com motilidade total e progressiva nas amostras do T2. Conclui-se que a adi莽茫o de trolox ap贸s descongela莽茫o do s锚men equino preserva a motilidade total e progressiva dos espermatozoides submetidos 脿 incuba莽茫o a 37潞C durante 120 minutos.<br>Three stallions were used to study the effect of trolox and pentoxifylline addition on the motility and integrity of acrossome and DNA equine spermatozoa after thawing. Tris-egg-yolg diluent with glycerol (5%) were used to freeze the semen samples in a freezing machine. The samples were thawed at 37潞C during 30 seconds and treated with: T1=150碌L of semen + 150碌L of Tris; T2= 150碌L of semen + 150碌L of Tris +150mM/mL of trolox; T3= 150碌L of semen + 150碌L Tris +3.5mM of pentoxifylline; and T4= 150碌L of semen + 150碌L of Tris + 3.5mM of pentoxifylline + 150mM of trolox. After 0, 60, and 120 minutes of incubation (37潞C), the samples were analyzed to motility, vigor, and integrity of acrossome and DNA. There was no difference (P>0.05) among treatments considering 0 and 60 minutes of incubation in all studied parameters. After 120 minutes of incubation, it was observed higher percentage (P<0.05) of cells with total and progressive motility in the samples of T2. It can be concluded that the trolox addition after thawing of equine semen preserved total and progressive motility of the sperm incubated at 37潞C during 120 minutes
    corecore