What is a permeability factor?

Published by Charlie Davidson on

What is a permeability factor?

The permeability factor, k, then refers to the entire flow field, and must be determined experimentally. In most cases the flow through the fuel cell flow field is laminar, which means that the pressure drop is linearly proportional to velocity, that is, to flow rate.

What is circulating permeability factor?

The term “permeability” refers to the increased leakiness of the glomerular filtration barrier leading to proteinuria. The evidence for a “circulating” component of permeability factor in FSGS includes: (1) primary FSGS can recur very rapidly after kidney transplantation (~30% of cases in adults, >50% in children).

What causes focal segmental glomerulosclerosis?

Focal segmental glomerulosclerosis, or FSGS, can be caused by a variety of conditions, like diabetes, sickle cell disease, other kidney diseases, and obesity. It can also be caused by an infection and drug toxicity. A rare form of FSGS is caused by inherited abnormal genes. Sometimes there’s no identifiable cause.

What is a circulating factor?

Circulating factors contribute to activate molecular pathways that regulate cardiac aging. The profound interconnection between heart and brain becomes more evident with aging and thus understanding the specific role of these factors may represent a novel therapeutic opportunity for chronic disorders.

What factors affect soil permeability?

The factors that affect the coefficient of permeability for a given soil are particle size distribu- tion (grading curve), void ratio, level of saturation, soil structure, and soil imperfections or discontinu- ities [1, 2, 3, 4]. The coefficient of permeability increases significantly with increase in the void ratio.

What is the treatment for focal segmental glomerulosclerosis?

FSGS treatment An angiotensin-converting enzyme (ACE) inhibitor or an angiotensin II receptor blocker (ARB) to lower your blood pressure and reduce protein in your urine. High cholesterol medication. Diuretic medications to help excrete salt and water, which can improve blood pressure and swelling.

Can focal segmental glomerulosclerosis be cured?

FSGS has no cure. The prognosis varies depending on the person. For some people, FSGS goes away on its own without treatment. For others, the disease continues for many years but does not get worse.

How can soil permeability be reduced?

It is common practice to alter the soil structure to reduce permeability, for example, in irrigated agriculture through the puddling of rice fields and in civil engineering through the mechanical compaction* of earthen dams. Similar practices may be applied to fish-ponds to reduce water seepage.

What is the value of permeability?

The permeability of free space, μ0, is a physical constant used often in electromagnetism. It is defined to have the exact value of 4π x 10-7 N/A2 (newtons per ampere squared). It is connected to the energy stored in a magnetic field, see Hyperphysics for specific equations.

Is scarring of the kidney serious?

In FSGS, the scarring occurs only in some of the glomeruli. And only part of the individual glomeruli is damaged. Untreated, it can lead to kidney failure. In some cases, kidney failure can occur despite treatment.

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