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Topics referred to by the same term
Drug permeability Semipermeable membrane, a membrane which will allow certain molecules or ions to pass through it by diffusion Vascular permeability, the
Permeability
Measure of the ability of a porous material to allow fluids to pass through it
more easily flow through a material with high permeability than one with low permeability. The permeability of a medium is related to the porosity, but
Permeability_(porous_media)
Ability of magnetization
electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented
Permeability (electromagnetism)
Permeability_(electromagnetism)
Physical constant
magnetic permeability (variously vacuum permeability, permeability of free space, permeability of vacuum, magnetic constant) is the magnetic permeability in
Vacuum_permeability
Percentage of empty volume in a ship
other non-water objects. Permeability is used for ship survivability and damage stability calculations in ship design. Permeability is sometimes split into
Permeability_(nautical)
Type of membrane
either side, as well as the permeability of the membrane to each solute. Depending on the membrane and the solute, permeability may depend on solute size
Semipermeable_membrane
Measure of drug take up into the body
its bioavailability. When drug permeability is empirically measured in vitro, it is generally called apparent permeability (Papp) as its absolute value
Drug_permeability
Ability of a contact lens to allow oxygen to reach the eye
source. Barrer – unit of gas permeability of membranes and contact lenses Oxygen transmission rate "Oxygen permeability". lenses-contact.co.uk. Archived
Oxygen_permeability
Dimensionless measure of a porous material's permeability
relative permeability of a phase is a dimensionless measure of the effective permeability of that phase. It is the ratio of the effective permeability of that
Relative_permeability
Medical term
intestinal lumen. Selective permeability is mediated via two major routes: Transepithelial or transcellular permeability. This consists of specific transport
Intestinal_permeability
Attribute of blood vessels
Vascular permeability, often in the form of capillary permeability or microvascular permeability, characterizes the permeability of a blood vessel wall–in
Vascular_permeability
Roads built with water-pervious materials
cellular grid reduces compaction of the soil to maintain permeability, while the roots improve permeability due to their root channels. In new suburban growth
Permeable_paving
Ability of soils to allow water to flow through its voids
Laboratory experiments: Constant Head Permeability Test, Low-level permeability test, Horizontal permeability test. Field experiments: Free aquifer,
Permeability_of_soils
Biological membrane that separates the interior of a cell from its outside environment
secondary structures. It was not until later studies with osmosis and permeability that cell membranes gained more recognition. In 1895, Ernest Overton
Cell_membrane
Accumulation of excess fluid in tissue
of the vessel wall open up then permeability to water is increased first, but as the gaps increase in size permeability to protein also increases with
Edema
System to differentiate drugs on the basis of their solubility and permeability
their solubility and permeability. This system restricts the prediction using the parameters solubility and intestinal permeability. The solubility classification
Biopharmaceutics Classification System
Biopharmaceutics_Classification_System
Protein pore formed in mitochondria under pathological conditions
The mitochondrial permeability transition pore (mPTP or MPTP; also referred to as PTP, mTP, or MTP) is a protein pore complex that forms in the inner mitochondrial
Mitochondrial permeability transition pore
Mitochondrial_permeability_transition_pore
Freedom of movement of traffic
concerning permeability. The first relates to property crime. Although the issue is contested, there is some research evidence to suggest that permeability may
Permeability (spatial and transport planning)
Permeability_(spatial_and_transport_planning)
Unit of permeability
Typical values of permeability range as high as 100,000 darcys for gravel, to less than 0.01 microdarcys for granite. Sand has a permeability of approximately
Darcy_(unit)
Method used in concrete casting
Controlled Permeability Formwork. Concrete Quarterly, British Cement Association, Summer 1990, pp. 6–7. Harrison, T.A. Introducing Controlled Permeability Formwork
Controlled permeability formwork
Controlled_permeability_formwork
Property of foundry sand
in other words, permeability is the property by which we can know the ability of material to transmit fluid/gases. The permeability is commonly tested
Permeability_(foundry_sand)
Nickel-iron alloy with high magnetic permeability
is a soft magnetic alloy with exceptionally high magnetic permeability. The high permeability of mu-metal provides a low reluctance path for magnetic flux
Mu-metal
San Francisco-based literary publishing company
Permeable Press was a San Francisco-based literary publishing company founded in 1990 by Brian Charles Clark. A "micropress" operating on less than U
Permeable_Press
Type of electromagnet formed by a coil of wire
permeability of the magnetic path is the same as permeability of free space, μ0. If the solenoid is immersed in a material with relative permeability
Solenoid
chemistry, parallel artificial membrane permeability assay (PAMPA) is a method which determines the permeability of substances from a donor compartment
Parallel artificial membrane permeability assay
Parallel_artificial_membrane_permeability_assay
Systems for measuring textiles
contained to form a loop. Air permeability is a measure of the ability of air to pass through a fabric. Air permeability is defined as "the volume of air
Units_of_textile_measurement
Study of how deformed rocks alter fluid flows
can vary the permeability of a fault zone. Some processes affect the permeability temporarily. These processes enhance the permeability for a certain
Fault_zone_hydrogeology
Method of approximating the properties of a composite material
is effective relative complex permeability of the mixture, μ d {\displaystyle \mu _{d}} is relative complex permeability of the background medium containing
Effective medium approximations
Effective_medium_approximations
Penetration of a liquid, gas, or vapor through a solid
considered carefully in many polymer applications, due to their high permeability. Permeability depends on the temperature of the interaction as well as the characteristics
Permeation
Decompression model and algorithm based on bubble physics
The Varying Permeability Model, Variable Permeability Model or VPM is an algorithm that is used to calculate the decompression needed for ambient pressure
Varying_Permeability_Model
Organ covering the outside of the human body
the only way to increase its permeability. Recently, simpler and more effective methods for increasing skin permeability have been developed. Ultraviolet
Human_skin
Ability of water to flow through a porous material
the permeability of soil with minimum disturbances. In laboratory methods, the degree of disturbances affect the reliability of value of permeability of
Hydraulic_conductivity
Drug delivery to the bladder
low permeability of the bladder wall itself. Due to the advantages of directly targeting the bladder, as well as the effectiveness of permeability enhancers
Intravesical_drug_delivery
Movement of molecules to lower concentration
small molecules like oxygen, carbon dioxide, nitrogen, and nitric oxide. Permeability depends on solubility, charge, or chemistry, as well as solute size.
Osmosis
Nickel–iron alloy with high magnetic permeability
typically have relative permeability of around 100,000, compared to several thousand for ordinary steel. In addition to high permeability, its other magnetic
Permalloy
Non-SI unit of gas permeability
thickness and area. The cm corresponds in the permeability equations to the thickness of the material whose permeability is being evaluated, the cm3STPcm−2s−1
Barrer
Subsurface pool of hydrocarbons
rock formations with lower permeability, while in unconventional reservoirs the rocks have high porosity and low permeability, which keeps the hydrocarbons
Petroleum_reservoir
Term for several kidney diseases
affects the cells surrounding the glomerulus, podocytes, increases the permeability to proteins, resulting in an increase in excreted proteins. When the
Glomerulonephritis
Protein found in humans
P-glycoprotein 1 (permeability glycoprotein, abbreviated as P-gp or Pgp) also known as multidrug resistance protein 1 (MDR1) or ATP-binding cassette sub-family
P-glycoprotein
Theory that living organisms are made up of cells
Troshin published a book, The Problems of Cell Permeability, in Russian, in which he showed that permeability was of secondary importance in determining the
Cell_theory
Protein
disorders characterized by increased intestinal permeability, particularly celiac disease. Intestinal permeability Tight junction Haptoglobin Properdin Larazotide
Zonulin
Topics referred to by the same term
country code Single negative metamaterial, with negative permittivity or permeability LNER Class A4 4498 Sir Nigel Gresley, a British steam locomotive Sit
Sng
Electric potential difference between interior and exterior of a biological cell
consideration the relative permeability of the plasma membrane to each ion in question. In reality, there is some degree of permeability for several ions simultaneously
Membrane_potential
Mammalian protein found in Homo sapiens
Bactericidal permeability-increasing protein (BPI) is a 456-residue (~50kDa) protein that is part of the innate immune system, coded for in the human by
Bactericidal permeability-increasing protein
Bactericidal_permeability-increasing_protein
Closed loop path containing a magnetic flux
_{\mathrm {r} }\mu _{0}} is the permeability of the material ( μ r {\displaystyle \mu _{\mathrm {r} }} is the relative permeability of the material (dimensionless)
Magnetic_circuit
Material with a negative refractive index
and permeability μeff values have exceeded those found in any ordinary material. Furthermore, the characteristic of negative (effective) permeability evinced
Negative-index_metamaterial
Fine grained natural soil
as well as impart modified behavior: increased stiffness, decreased permeability, decreased electrical conductivity, etc. Traditional uses of clay as
Clay
Single-cell layer lining the intestines
are osmolarity and the specific intestinal region. Regulated selective permeability is performed through two major routes: the transcellular (transepithelial)
Intestinal_epithelium
Clade of reptiles
Chicxulub impact may have triggered these eruptions by increasing the permeability of the mantle plume underlying the Deccan Traps. Whether the Deccan Traps
Dinosaur
Underground water-bearing rock
environments have moderate to high permeability while sandy deposits formed in river environments have low to moderate permeability. Rainfall and snowmelt enter
Aquifer
Statement on equilibrium in electromagnetism
with relative magnetic permeability greater than one (paramagnetism) are further destabilising, but materials with a permeability less than one (diamagnetic
Earnshaw's_theorem
Form of natural gas extracted from coal beds
gas from the matrix. Fracture permeability acts as the major channel for the gas to flow. The higher the permeability, the higher the gas production
Coalbed_methane
maintained, the results are comparable. At low rates, air permeability will be higher than brine permeability. This is because gas does not adhere to the pore
Klinkenberg_correction
Powder fineness indicator
The air permeability specific surface of a powder material is a single-parameter measurement of the fineness of the powder. The specific surface is derived
Air permeability specific surface
Air_permeability_specific_surface
Systems with external interactions
an open system is one whose border is permeable to both energy and mass. By contrast, a closed system is permeable to energy but not to matter. The definition
Open_system_(systems_theory)
Fundamental interaction between charged particles
quantity defined via Ampère's law and takes the permeability as a dimensionless quantity (relative permeability) whose value in vacuum is unity. As a consequence
Electromagnetism
Thin, transparent sheet made of cellulose
Its low permeability to air, oils, greases, bacteria, and liquid water makes it useful for food packaging. Cellophane is highly permeable to water vapor
Cellophane
point of relative permeability curves (i.e., where relative permeabilities are equal to each other), and the normalized water permeability at residual oil
Lak_wettability_index
Equation describing the flow of a fluid through a porous medium
phase (fluid) flow, is the defining equation for absolute permeability (single phase permeability). With reference to the diagram to the right, the flow
Darcy's_law
Semipermeable capillary interface between blood and the brain
et al. (November 2016). "Hyperfibrinolysis increases blood-brain barrier permeability by a plasmin- and bradykinin-dependent mechanism". Blood. 128 (20): 2423–2434
Blood–brain_barrier
Functional unit of nephron
as shown on the picture. The structures of the layers determine their permeability-selectivity (permselectivity). The factors that influence permselectivity
Glomerulus_(kidney)
Part of the female reproductive tract
squamous cells are more resistant to both abrasion and infection. The permeability of the epithelium allows for an effective response from the immune system
Vagina
Fracturing bedrock by pressurized liquid
fracturing used in low-permeability formations, small hydraulic fracturing treatments are commonly used in high-permeability formations to remedy "skin
Fracking
Polyethylene food wrap
has an oxygen permeability of 0.6 cm3 μm m−2 d−1 kPa−1 while low-density polyethylene under the same conditions has an oxygen permeability of 2000 cm3 μm
Saran_(plastic)
Artificial world of a game
In games and digital media, the "magic circle" is the space in which the normal rules and reality of the world are suspended and replaced by the artificial
Magic_circle_(games)
Object used to guide and confine magnetic fields
A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical
Magnetic_core
Feature of some magnetic materials
can also be expressed as the magnetic permeability: μ = B / H {\displaystyle \mu =B/H} or the relative permeability μ r = μ / μ 0 {\displaystyle \mu _{r}=\mu
Saturation_(magnetic)
Enclosing or separating membrane in organisms acting as selective semi-permeable barrier
A biological membrane or biomembrane is a selectively permeable membrane that separates the interior of a cell from the external environment or creates
Biological_membrane
Mechanism by which materials form into and are attracted to magnets
magnet, which is a consequence of their substantial magnetic permeability. Magnetic permeability describes the induced magnetization of a material due to
Ferromagnetism
Natural gas produced from reservoir rocks
0.1 millidarcy (mD) matrix permeability and less than ten percent matrix porosity. Although shales have low permeability and low effective porosity,
Tight_gas
Thin, film-like structure separating two fluids, acting as a selective barrier
following parameters on the overall permeate flux are: The membrane permeability (k) The operational driving force per unit membrane area (Trans Membrane
Membrane
Number, approximately 3.14
v . {\displaystyle F=6\pi \eta Rv.} In electromagnetics, the vacuum permeability constant μ0 appears in Maxwell's equations, which describe the properties
Pi
Static membrane potential in biology
modulating sodium and chloride permeabilities and gradients. In a healthy animal cell Na+ permeability is about 5% of the K+ permeability or even less, whereas
Resting_potential
Phylum of invertebrates with jointed exoskeletons
as much as possible with water. The ammonia is then eliminated via any permeable membrane, mainly through the gills. All crustaceans use this system, and
Arthropod
Psychoactive drug, often called ecstasy
the neuroimmune system that, through several mechanisms, increases the permeability of the blood–brain barrier, thereby making the brain more susceptible
MDMA
composed of nickel (75%), iron (20%), and molybdenum (5%). It is a high permeability ferromagnetic alloy used in magnetic cores and magnetic shielding in
Supermalloy
Type of electromagnetic metamaterial
Negative permeability was achieved with a split-ring resonator (SRR) as part of the subwavelength cell. The SRR achieved negative permeability within a
Photonic_metamaterial
Hypothetical medical condition
that is distinct from the scientific phenomenon of increased intestinal permeability commonly known as "leaky gut". Claims for the existence of "leaky gut
Leaky_gut_syndrome
High-porosity, water-permeable concrete
results in higher compressive strength, but lower porosity (and thus lower permeability). Jointing varies little from other concrete slabs. Joints are tooled
Pervious_concrete
Australian conservationist (1962–2006)
model Thalmann algorithm Thermodynamic model of decompression Varying Permeability Model Equivalent air depth Oxygen window Physiology of decompression
Steve_Irwin
1812–1815 conflict in North America
Retrieved 31 July 2020. Berthier-Foglar, Susanne; Otto, Paul (2020). Permeable Borders: History, Theory, Policy, and Practice in the United States. Berghahn
War_of_1812
Structure extending into a body of water to alter water flow
Groynes are generally straight but could be of various plan view shapes, permeable or impermeable, built from various materials such as wood, sand, stone
Groyne
Season of television series
Sheldon dismisses him and restores Raj as a friend. 31 14 "The Financial Permeability" Mark Cendrowski Story by : Chuck Lorre & Steven Molaro Teleplay by :
The_Big_Bang_Theory_season_2
Top of a saturated aquifer
rate at which water is added to and removed from the aquifer and the permeability of the material. The water table does not always mimic the topography
Water_table
Groundwater cleaning technique
promising for treating non-polar organic contaminants. However, clay's low permeability means it cannot be used in flow-through PRBs, but have been proposed
Permeable_reactive_barrier
Mountain pass and archaeological site in Colorado, USA
geotextile stabilization fabrics whose characteristics match the soil and the permeability of the existing roadbed. There are several drystack retaining walls on
Rollins_Pass
Technology for splitting specific gases out of mixtures
membrane. The performance of the membrane depends on permeability and selectivity. Permeability is affected by the penetrant size. Larger gas molecules
Membrane_gas_separation
Fluid emitted through pores or a wound
higher the specific gravity, the greater the likelihood of capillary permeability changes in relation to body cavities. For example, the specific gravity
Exudate
American filmmaker (1946–2025)
Chris Thiessen, Lynch's films explore "enchanted (and haunted) worlds, permeable and multi-layered, filled with the unknown and the spiritual." Critic
David_Lynch
Physical effects resulting from activation of the immune system
flow causes the redness (rubor) and increased heat (calor). Increased permeability of the blood vessels results in an exudation (leakage) of plasma proteins
Inflammation
Street with only one way in and out
through streets tend to be safe. As for permeability, it suggests that residential areas should be permeable enough to allow movement in all directions
Dead-end_street
Type of contact lens
rigid gas-permeable lens, also known as an RGP lens, GP lens, or colloquially, a hard contact lens, is a rigid contact lens made of oxygen-permeable polymers
Rigid_gas_permeable_lens
Meningeal structure
essentially the brain. Due to the pia mater's and the ependyma's high permeability, water and small molecules in the CSF are able to enter the brain interstitial
Pia_mater
Anion of glutamic acid in its role as a neurotransmitter
receptors are also ionotropic, but they differ from AMPA receptors in being permeable, when activated, to calcium. Their properties make them particularly important
Glutamate_(neurotransmitter)
Absolute dielectric permittivity of free space
parameter referred to as the magnetic constant (also called vacuum permeability or the permeability of free space). Historically, the parameter ε0 has been known
Vacuum_permittivity
Measuring tool
sensor thanks to the apparent permeability of the ferromagnetic core. The magnetic amplification, known as apparent permeability μ a p p {\displaystyle \mu
Search_coil_magnetometer
Model of cell membranes
by proteins and lipids with pore-like structures that allow specific permeability for certain molecules. Then, they suggested a model for the cell membrane
Fluid_mosaic_model
Topics referred to by the same term
University of Indonesia U1 (disambiguation) μi, the initial magnetic permeability of a material This disambiguation page lists articles associated with
UI
Early diving decompression model
to the Varying Permeability Model. but is conceptually different in that it rejects the gel-bubble model of the varying permeability model. It is used
Thermodynamic model of decompression
Thermodynamic_model_of_decompression
Family of transport proteins
of excitable cells (e.g., muscle, glial cells, neurons, etc.) with a permeability to the sodium ion Na+. They are the main channels involved in action
Voltage-gated_sodium_channel
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