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1. Biology
a. A thin, pliable layer of tissue covering surfaces or separating or connecting regions, structures, or organs of a living organism.
b. A semipermeable layer that bounds a cell or an organelle, typically consisting of lipids and proteins.
2. A thin, pliable sheet or layer of natural or synthetic material: the resonating membrane of a kazoo.
3. A piece of parchment.
4. Chemistry A thin sheet of natural or synthetic material that is permeable to substances in solution.

[Latin membrāna, skin, from membrum, member of the body.]

mem′bra·nal (-brə-nəl) adj.


(Biology) relating to membranes
References in periodicals archive ?
Protection of membranal lipids against lipid oxidation by vitamin E has been suggested to be the mechanism responsible for the positive influence of dietary vitamin E on the water holding capacity since the integrity of the cell membrane is thought to be associated with drip loss (Asghar et al.
Effect of Vitamin E supplementation on semen quality and the testicular cell membranal and mitochondrial antioxidant abilities in Aohan fine-wool sheep.
La HFE se sintetiza en el enterocito, donde presenta una localizacion intracelular y perinuclear; mientras que en otros lugares de sintesis como el hepatocito, los macrofagos, el musculo esqueletico y el sincitiotrofoblasto, la ubicacion es membranal (50,51).
The membranal PIP3, a signaling molecule, recruits and activates proteins that contain the pleckstrin homology (PH) domain such as the phosphoinositide-dependent protein kinase (PDK) and protein kinase B (Akt) serine/threonine kinases and the activation of PDK and Akt successively promotes the activation and transcription of their target genes (GSK3, FOXO, BAD, mTOR1, and p53) [89-92].
La elevada actividad de FAI fue asociada con mayor elongacion de las microvellosidades intestinales, elevado intercambio membranal y reduccion en la relacion colesterol/fosfolipidos (39).
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