J A Cebrian Pérez

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
1. Membranes obtained by lysis and Yeda-press treatment of synaptosomes (nerve endings) from cortex, caudateus nucleus, and hippocampal region of calf brain have been studied by partitioning within a liquid-liquid aqueous two-phase system consisting of water, dextran, Ficoll, and poly(ethylene glycol). 2. The partitioning of membranes was sensitive to the(More)
Ram sperm was frozen in the presence of the most commonly used cryoprotectants. After thawing, the overall cell surface changes provoked by freezing were assessed by centrifugal counter-current distribution (CCCD). In addition, cell membrane integrity (viability) of all the treated sperm was estimated by fluorescent staining. Fresh and refrigerated sperm(More)
The activity of glucose-6-phosphate dehydrogenase changes when the mycelium is grown on different carbon sources. In the presence of ribose, the activity of the enzyme is approximately 3 times higher than when the mycelium is grow in a medium containing glucose. This increase in the enzyme activity is developed progressively when the concentration of ribose(More)
Membranes obtained by lysis and Yeda-press treatment of synaptosomes (nerve endings) from calf brain cortex have been partitioned within the aqueous phases (and the interface between them) of a Ficoll-dextran-poly(ethylene glycol)-water two-phase system. By introducing the dye Procion yellow HE-3G in the upper phase, bound to poly(ethylene glycol), or in(More)
  • 1