Mn-Zn ferrites substituted with Ti4+ ions are now becoming commercially important. The substitution with titanium ions in Mn-Zn ferrite is recommended for ferrites with low losses and low temperature factor of initial permeability, Tdpi because of the shift of the secondary maximum of permeability, SMP, towards lower temperatures [I] and the increase of he d.c.resistivity [3,4,5]. The present p...

The permeability properties of planar lipid bilayers made from egg lecithin, n-decane and a long-chain secondary amine (n-lauryl [trialkylmethyl]amine) are described. Membranes containing the secondary amine show halide selectivity and high conductance at pH less than 6, as estimated by measurements of zero-current potentials generated by NaBr activity gradients. In the absence of halide ions, ...

BACKGROUND Patients with focal segmental glomerulosclerosis (FSGS) develop nephrotic syndrome and terminal renal failure in most cases. FSGS reappears in 15-50% of transplanted kidneys and frequently causes the graft loss. Sera from patients with FSGS of native or transplanted kidneys contain some proteinuric or permeability factors (PF) which can be removed by means of plasma exchange (PE) or ...

We investigated the possibility that the TRPC gene family of putative store-operated Ca2+ entry channels contributes to the increase in microvascular endothelial permeability by prolonging the rise in intracellular Ca2+ signaling. Studies were made in wild-type (wt) and TRPC4 knockout (TRPC4(-/-) mice and lung vascular endothelial cells (LECs) isolated from these animals. RT-PCR showed expressi...

Accurate permeability estimation has always been a concern in determining flow units, assigning appropriate capillary pressure andrelative permeability curves to reservoir rock types, geological modeling, and dynamic simulation.Acoustic method can be used as analternative and effective tool for permeability determination. In this study, a four-step approach is proposed for permeability estimati...

Acute lung injury (ALI) is a life-threatening syndrome that causes high morbidity and mortality worldwide. ALI is characterized by increased permeability of the alveolar-capillary membrane, edema, uncontrolled neutrophils migration to the lung, and diffuse alveolar damage, leading to acute hypoxemic respiratory failure. Although corticosteroids remain the mainstay of ALI treatment, they cause s...

reservoir permeability is a critical parameter for characterization of the hydrocarbon reservoirs. in fact, determination of permeability is a crucial task in reserve estimation, production and development. traditional methods for permeability prediction are well log and core data analysis which are very expensive and time-consuming. well log data is an alternative approach for prediction of pe...

THE VASCULAR ENDOTHELIUM plays a vital role in the inflammatory response by induction and surface expression of adhesion molecules and chemokines. At sites of acute inflammation, blood flow is increased and postcapillary venules exhibit increased permeability (leakiness) and support the influx of blood leukocytes, primarily neutrophils. The relationship between neutrophil influx and increased v...

The relationship between matrix volume and the amount of light scattered by a mitochondrial suspension has been characterized for equilibrium measurements and shown to depend in a complex but predictable manner on native structure of the mitochondrion (Beavis, A. D., Brannan, R. D., and Garlid, K. D. (1985) J. Biol. Chem. 260, 13424-13433). In the present report, we show that this characterizat...