define - permeable
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Meaning of âpermeableâ in the English Dictionary › If a substance is permeable, it allows liquids or gases to go through it: Certain types of sandstone are permeable to water. The solvent passes through the permeable membrane to the solution. Soft and gas-permeable contact lenses are kinder to the eyes than hard lenses. Opposite. impermeable.
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- Permeability Coefficient. The permeability coefficient, P (or simply the permeability) is defined as the transport flux of material through the membrane per unit driving force per unit membrane thickness. It's value must be experimentally determined. The barrer is the commonly used unit for gas separation and it is defined as:
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Permeation In physics and engineering, permeation (also called imbuing) is the penetration of a permeate (such as a liquid, gas, or vapor) through a solid.It is directly related to the concentration gradient of the permeate, a material's intrinsic permeability, and the materials' Mass diffusivity.n physics and engineering, permeation (also called imbuing) is the penetration of a permeate (such as a liquid, gas, or vapor) through a solid.
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Semipermeable membrane How the membrane is constructed to be selective in its permeability will determine the rate and the permeability. Many natural and synthetic materials thicker than a membrane are also semipermeable. One example of this is the thin film on the inside of an egg.
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Is a door selectively permeable? The cell membrane is the organelle that is selectively permeable.
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- Permeability refers to the ease with which molecules cross biological membranes. Because of the chemical and structural nature of the phospholipid bilayer (hydrophobic core), only lipid-soluble molecules and some small molecules are able to freely pass through the lipid bilayer.
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- - Cell membranes are selective permeable. Cell walls are fully permeable-which means that it allows all substances/molecules to pass in and o … ut of the cell. It is located outside of the membrane.5 people found this useful.elecive permeability is important because it keeps cells functioning properly by letting only wanted molecules (solutes) in and unwanted solutes out. In addition to keeping t … he bad stuff out (e.g. bacteria, viruses), selective permeability is essential to the function of our nervous system.
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Pervious concrete Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater ...
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Selective Permeability: Definition & Overview Because selective permeability is a complex topic, you will be learning the definitions of several terms in this lesson. Selective permeability usually refers to what can enter and exit a cell membrane. There are other processes that are selectively permeable such as some plastics. However, for the purpose of this lesson we will refer to the cell membrane for consistency. Let's describe a membrane for you.
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Bette Davis at 104: Still smokin' I was reminded of this interview I did with her in 1988, which appeared on my CinePad website 10 years later: When my former Seattle Times editor called me, a few months after I'd moved to Los Angeles, to say he wanted me to interview Bette Davis, I wasn't as thrilled as I probably should have been.
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Semipermeable membrane Semipermeable membrane. The diffusion of water through a selectively permeable membrane is called osmosis.This allows only certain particles to go through including water and leaving behind the solutes including salt and other contaminants. In the process of reverse osmosis, thin film composite membranes (TFC or TFM) are used.
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permeability (magnetic permeability) The permeability factors of some substances change with rising or falling temperature, or with the intensity of the applied magnetic field. In engineering applications, permeability is often expressed in relative, rather than in absolute, terms. If µ o represents the permeability of free space (that is, 1.257 x 10-6 H/m) and µ represents the permeability of the substance in question (also specified in henrys per meter), then the relative permeability, µ r, is given by: µ r = µ / µ o
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CONTENTS The Plasma Membrane is a selectively permeable membrane as it only allows entry and exit of some selected molecules into and out of the Cells. It also prevents movement of s … ome other materials, therefore the plasma membrane is called a selectively permeable membrane. 104 people found this useful. Johnellishartford.
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- Permeability (earth sciences), a measure of the ability of a material (such as rocks) to transmit fluids; Permeability (foundry sand), is a test of the venting characteristics of a rammed foundry sand; Hydraulic conductivity the permeability of soil for water; Vehicles and transport
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What is Selective Permeability? In cell biology, selective permeability is the property of a living cell membrane that allows the cell to control which molecules can pass through the membrane, moving into or out of the cell. In order to understand this property, it helps to be aware that there are three different methods by which molecules can move into or out of cells: passive transport, active transport, and transport by the use of vesicles.
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Groundwater Definitions It is independent of the thickness of that material. See Transmissivity for related definition. Another term for hydraulic conductivity is coefficient of permeability. Impermeable layer: A layer of material (such as clay) in an aquifer through which water does not pass or passes extremely slowly.
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What does the term selectively permeable mean? The cell membrane is selectively permeable, meaning that it only lets in and out certain materials such as, proteins, nutrients, water, waste, etc.n the field of biology Semipermeable and Selectively Permeable refer to what substances the cell membrane allows to permeate (cross) into and out of the cell. The two terms … can be used interchangeably. 2 people found this useful.
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capillary permeability capillary permeability. a condition of the capillary wall structure that allows blood elements and waste products to pass through the capillary wall to tissue spaces. capillary permeability. The condition of the capillary wall that enables substances in the blood to pass into tissue spaces or into cells, or vice versa. See also: permeability. capillary. 1. pertaining to or resembling a hair.
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- Full Definition of PERMEATE. intransitive verb. : to diffuse through or penetrate something. transitive verb. 1. 2. : to pass through the pores or interstices of. — per·me·ative \-ˌā-tiv\ adjective.See permeate defined for English-language learners.See permeate defined for kids.edical Definition of PERMEATE. intransitive verb. : to diffuse through or penetrate something. transitive verb. : to pass through the pores or interstices of.
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- Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content. Link to this page: <a href=http://www.thefreedictionary.com/Selectively+permeable>semipermeable membrane</a>.
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- Plasma Membrane. All living cells, prokaryotic and eukaryotic, have a plasma membrane that encloses their contents and serves as a semi-porous barrier to the outside environment. The membrane acts as a boundary, holding the cell constituents together and keeping other substances from entering. The plasma membrane is permeable to specific molecules, however, and allows nutrients and other essential elements to enter the cell and waste materials to leave the cell.
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- Look at the words - selective and permeable.   What does 'selective' mean? You select what to eat-an apple or an orange; you select where to sleep-the bed or the f … loor; you select what movie to see.   So, selective means to have a choice between things.
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What is the reducing agent in the following reaction? Pyruvate + NADH + H+ ? Lactate + NAD+ Choose one answer. a. selectively permeable (or differentially permeable), allowing some substances to pass through easily, while completely or partially excluding others. Although there are several methods by which solutes may enter or leave cells, the most common is diffusion. Diffusion is the movement of a substance (e.g. molecules and ions) from a region of higher
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- Split and merge into it. Answer by Betaclamp. Confidence votes 21.0K. The plasma membrane is selectively permeable because it needs to allow certain things in and certain things out. The plasma membrane is a selectively permeable membrane as it allows the entry and exit of some selected substances only.
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- In  earth sciences permeability is a measure of how a porous material  such as a rock allows fluids to pass through it.      absorbency   absorbency.asalt is mainly comprised of calcic plagioclase feldspar and  pyroxene. Olivine can also occur in large amounts in basalt and a  number of other minerals may appear in mino … r amounts.
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SELECTIVE PERMEABILITY Characteristic of a membrane which allows it to be permeable to some substances, and impermeable to others. See also: permeability. SELECTIVE PERMEABILITY: Membranes exhibiting selective permeability are employed in a variety of structures within the body..