Tight binding (disambiguation)

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Tight binding in physics describes electronic band structure.

In solid-state physics, the tight-binding model is an approach to the calculation of electronic band structure using an approximate set of wave functions based upon superposition of wave functions for isolated atoms located at each atomic site. The method is closely related to the LCAO method used in chemistry. Tight-binding models are applied to a wide variety of solids. The model gives good qualitative results in many cases and can be combined with other models that give better results where the tight-binding model fails. Though the tight-binding model is a one-electron model, the model also provides a basis for more advanced calculations like the calculation of surface states and application to various kinds of many-body problem and quasiparticle calculations.

Tight binding may also refer to:

Leukocyte extravasation The passage of a leukocyte between the tight junctions of endothelial cells lining blood vessels, typically the fourth and final step of cellular extravasation.

Leukocyte extravasation, less commonly called diapedesis, is the movement of leukocytes out of the circulatory system and towards the site of tissue damage or infection. This process forms part of the innate immune response, involving the recruitment of non-specific leukocytes. Monocytes also use this process in the absence of infection or tissue damage during their development into macrophages.

Japanese bondage

Kinbaku (緊縛) means "tight binding," while Kinbaku-bi (緊縛美) literally means "the beauty of tight binding." Kinbaku is a Japanese style of bondage or BDSM which involves tying a person up using simple yet visually intricate patterns, usually with several pieces of thin rope. In Japanese, this natural-fibre rope is known as asanawa (麻縄); the Japanese vocabulary does not make a distinction between hemp and jute. The allusion is to the use of hemp rope for restraining prisoners, as a symbol of power, in the same way that stocks or manacles are used in a Western BDSM context. The word shibari came into common use in the West at some point in the 1990s to describe the bondage art Kinbaku. Shibari (縛り) is a Japanese word that literally means "to tie decoratively".

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Snowboard winter sport equipment

Snowboards are boards where both feet are secured to the same board, which are wider than skis, with the ability to glide on snow. Snowboards widths are between 6 and 12 inches or 15 to 30 centimeters. Snowboards are differentiated from monoskis by the stance of the user. In monoskiing, the user stands with feet inline with direction of travel, whereas in snowboarding, users stand with feet transverse to the longitude of the board. Users of such equipment may be referred to as snowboarders. Commercial snowboards generally require extra equipment such as bindings and special boots which help secure both feet of a snowboarder, who generally rides in an upright position. These types of boards are commonly used by people at ski hills or resorts for leisure, entertainment, and competitive purposes in the activity called snowboarding.

Hosiery leg coverings, sometimes woven in one with panties, that extend to the ankle and usually cover the foot; generally knitted or woven, sheer or opaque, and of lightweight or heavy fabric

Hosiery, also referred to as legwear, describes garments worn directly on the feet and legs. The term originated as the collective term for products of which a maker or seller is termed a hosier; and those products are also known generically as hose. The term is also used for all types of knitted fabric, and its thickness and weight is defined by denier or opacity. Lower denier measurements of 5 to 15 describe a hose which may be sheer in appearance, whereas styles of 40 and above are dense, with little to no light able to come through on 100 denier items.

Foot binding

Foot binding was the custom of applying tight binding to the feet of young girls to modify the shape and size of their feet. It was practiced in China from the Tang dynasty until the early 20th century, and bound feet were considered a status symbol as well as a mark of beauty. Foot binding was a painful practice and significantly limited the mobility of women, resulting in lifelong disabilities for most of its subjects. Feet altered by binding were called lotus feet.

Cofactor (biochemistry) a non-protein chemical compound or metallic ion that is required for a proteins biological activity to happen

A cofactor is a non-protein chemical compound or metallic ion that is required for an enzyme's activity. Cofactors can be considered "helper molecules" that assist in biochemical transformations. The rates at which these happen are characterized by enzyme kinetics.


Shibori is a Japanese manual resist dyeing technique, which produces patterns on fabric.

PLATO (computational chemistry)

PLATO is a suite of programs for electronic structure calculations. It receives its name from the choice of basis set used to expand the electronic wavefunctions.

Nuclear binding energy energy required to split a nucleus of an atom into its component parts.

Nuclear binding energy is the minimum energy that would be required to disassemble the nucleus of an atom into its component parts. These component parts are neutrons and protons, which are collectively called nucleons. The binding is always a positive number, as we need to spend energy in moving these nucleons, attracted to each other by the strong nuclear force, away from each other. The mass of an atomic nucleus is less than the sum of the individual masses of the free constituent protons and neutrons, according to Einstein's equation E=mc2. This 'missing mass' is known as the mass defect, and represents the energy that was released when the nucleus was formed.

Iron-56 isotope of iron

Iron-56 (56Fe) is the most common isotope of iron. About 91.754% of all iron is iron-56.

Enzyme inhibitor molecule that binds to an enzyme and decreases its activity

An enzyme inhibitor is a molecule that binds to an enzyme and decreases its activity. Since blocking an enzyme's activity can kill a pathogen or correct a metabolic imbalance, many drugs are enzyme inhibitors. They are also used in pesticides. Not all molecules that bind to enzymes are inhibitors; enzyme activators bind to enzymes and increase their enzymatic activity, while enzyme substrates bind and are converted to products in the normal catalytic cycle of the enzyme.

Breast binding flattening breasts by the use of constrictive materials, using cloth strips, elastic or non-elastic bandages, purpose-built undergarments, or shirts layered from tight to loose

Breast binding is the act of flattening breasts by the use of constrictive materials. The term also refers to the material used in this act. Common binding materials include cloth strips, elastic or non-elastic bandages, purpose-built undergarments and shirts layered from tight to loose. The act of breast binding is common for trans men, but is also done by androgynous, genderqueer and gender fluid people, as well as crossdressers, cosplayers, and performers. In a general sense; women may also use binders as alternatives to bras or as a practice of propriety.

Nickel-62 is an isotope of nickel having 28 protons and 34 neutrons.

Clostridium enterotoxin InterPro Family

Clostridium enterotoxins are toxins produced by Clostridium species.

Dihydrofolate reductase inhibitor molecule that inhibits the function of dihydrofolate reductase, and is a type of antifolate

A dihydrofolate reductase inhibitor is a molecule that inhibits the function of dihydrofolate reductase, and is a type of antifolate.

JWH-198 chemical compound

JWH-198 is a drug from the aminoalkylindole family which acts as a cannabinoid receptor agonist. It was invented by the pharmaceutical company Sanofi-Winthrop in the early 1990s. JWH-198 has a binding affinity at the CB1 receptor of 10nM, binding around four times more tightly than the parent compound JWH-200, which has no substitution on the naphthoyl ring. It has been used mainly in molecular modelling of the cannabinoid receptors.

JWH-193 chemical compound

JWH-193 is a drug from the aminoalkylindole family which acts as a cannabinoid receptor agonist. It was invented by the pharmaceutical company Sanofi-Winthrop in the early 1990s. JWH-193 has a binding affinity at the CB1 receptor of 6nM, binding around seven times more tightly than the parent compound JWH-200, though with closer to twice the potency of JWH-200 in activity tests. A structural isomer of JWH-193 with the methyl group on the indole ring instead of the naphthoyl ring, was also found to be of similarly increased potency over JWH-200.

Jamming knot

As a type of binding knot, the jamming knot is good for constricting a bundle of objects such as sticks or brush. It is basically a taut-line hitch but the initial two wraps are on the outside of the working line rather than on the inside, and finished off with one wrap on the inside. Thus the knot holds tension towards the inside of the loop rather than the standing end of the rope as with the taut-line – turning a tension knot into a constricting knot. After the knot is tied, the knot is held with one hand, the standing end is pulled tight, and the knot should hold fast. This knot, as with the taut-line, can be difficult or impossible to tie on slick or particularly stiff rope.

ADSB-FUB-187 chemical compound

ADSB-FUB-187 is an indazole-based synthetic cannabinoid. It is a potent agonist of the CB1 receptor with a binding affinity of Ki = 0.09 nM and an EC50 of 1.09 nM. It was originally developed by Pfizer in 2009, being example 187 from patent WO 2009/106982. While it is the most tightly binding compound from this patent in terms of Ki, it is not the most potent compound at producing a CB1 mediated pharmacological effect, with at least 17 other compounds from the patent having lower EC50 values.


2-Bromomescaline (2-Br-M) is a derivative of the phenethylamine hallucinogen mescaline which has an unusual 2-bromo substitution. It is an agonist for serotonin receptors, with a binding affinity of 215 nM at 5-HT1A, 513 nM at 5-HT2A and 379 nM at 5-HT2C, so while it is around ten times more tightly binding than mescaline at 5-HT1A and 5-HT2A receptors, it is over twenty times more potent at 5-HT2C.