activator


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activator

 [ak´tĭ-va″ter]
a substance that makes another substance active or reactive, induces a chemical reaction, or combines with an enzyme to increase its catalytic activity.
plasminogen activator a substance that activates plasminogen and converts it into plasmin; see t-plasminogen activator and u-plasminogen activator.
tissue plasminogen activator (TPA, t-PA) (t-plasminogen activator) a serine endopeptidase synthesized by endothelial cells, the major physiologic activator of plasminogen; when bound to fibrin clots it catalyzes the conversion of plasminogen to plasmin by hydrolysis of a specific arginine-valine bond. It can be produced by recombinant technology for use in thrombolytic therapy. It acts directly on blood clots and therefore presents a small risk of systemic bleeding; occasionally allergic reactions may occur.
u-plasminogen activator (urinary plasminogen activator) a serine endopeptidase that acts as a plasminogen activator by catalyzing the preferential cleavage of plasminogen at the same arginine-valine bond where t-plasminogen activator cleaves. It is produced in the kidney and excreted in the urine and is used in thrombolytic therapy (when used as a pharmaceutical, it is usually called urokinase). Unlike t-plasminogen activator or prourokinase, it does not require fibrin for activity. Called also urokinase.

ac·ti·va·tor

(ak'ti-vā-tōr),
1. A substance that renders another substance (for example, a catalyst) active, or that accelerates a process or reaction.
2. The fragment produced by chemical cleavage of a proactivator, that induces the enzymic activity of another substance.
3. An apparatus for making substances radioactive (for example, a neutron generator or a cyclotron).
4. A removable type of myofunctional orthodontic appliance that acts as a passive transmitter of force, produced by the function of the activated muscles, to the teeth and alveolar process that are in contact with it.
5. A protein that binds to a DNA sequence before RNA polymerase transcription, sometimes referred to as coactivator.

activator

/ac·ti·va·tor/ (ak´tĭ-va″ter)
1. a substance that combines with an enzyme to increase its catalytic activity.
2. a substance that stimulates the development of a specific structure in the embryo.
3. a chemical or other form of energy that causes another substance to become reactive or that induces a chemical reaction.

plasminogen activator  any of a group of substances that have the ability to cleave plasminogen and convert it into the active form plasmin.
prothrombin activator  any one of the substances in the extrinsic or intrinsic pathways of coagulation.
single chain urokinase-type plasminogen activator  (scu-PA) prourokinase.
tissue plasminogen activator  (TPA) (t-PA), t-plasminogen activator an endopeptidase synthesized by endothelial cells that binds to fibrin clots and catalyzes the cleavage of plasminogen to the active form plasmin. t-PA produced by recombinant technology is used for therapeutic thrombolysis.
u-plasminogen activator  formal name for urokinase. Called also urinary plasminogen a.

activator

[ak′tivā′tər]
1 a substance, force, or device that stimulates activity in another substance or structure, especially a substance that activates an enzyme.
2 a substance that stimulates the development of an anatomical structure in the embryo.
3 an internal secretion of the pancreas.
4 an apparatus for making substances radioactive, such as a cyclotron or neutron generator.
5 (in dentistry) a removable orthodontic appliance that functions as a passive transmitter and stimulator of the perioral muscles.

Activator

A protein that binds DNA at transcription control or enhancer sites—e.g., for an allosteric enzyme—and upregulates—i.e., positively regulates—gene transcription. Activators either increase binding of RNA polymerase to the promoter site or stimulate RNA polymerase to begin transcription.

ac·ti·va·tor

(ak'ti-vā-tŏr)
1. A substance that renders another substance active, or one that accelerates a process or reaction.
2. The fragment, produced by chemical cleavage of a proactivator, which induces the enzymatic activity of another substance.
3. An apparatus for making substances radioactive.
4. A removable type of myofunctional orthodontic appliance that acts as a passive transmitter of force, which is produced by the function of the activated muscles, to the teeth and alveolar process that are in contact with it.
5. A protein that binds to a DNA sequence before DNA polymerase transcription.
6. Manually assisted thrust instrument that activates mechanoreceptors; used by many chiropractors.

activator

any drug that increases the activity level of the person being treated.

activator (ak·ti·vāˑ·ter),

n a chiropractic technique that employs a device that, when applied to joints, muscles, and soft tissues, conveys a powerful impulse to correct subluxations.

ac·ti·va·tor

(ak'ti-vā-tŏr)
1. A substance that renders another substance active, or accelerates a process or reaction.
2. A removable type of myofunctional orthodontic appliance that acts as a passive transmitter of force, produced by the function of the activated muscles, to the teeth and alveolar process that are in contact with it.
See also: accelerator

activator (ak´tivātur),

n 1. an alkali, sodium carbonate, which is a component of photographic developing solution that softens and swells the gelatin of the film emulsion and provides the necessary alkaline medium for the developing agents to react with the sensitized silver halide crystals.
n 2. in orthodontics, a removable orthodontic appliance intended to function as a passive transmitter and sometimes stimulator of the forces of the perioral muscles. One in the myofunctional category of appliances also known by such names as
Andresen, Bimler, Monobloc, and
Frankel.

activator

a substance that makes another substance active or that renders an inactive enzyme capable of exerting its proper effect.

developing activator
see developing accelerator.
plasminogen activator
a substance that activates plasminogen and converts it into plasmin.

Patient discussion about activator

Q. Are there any nice activities for adults with autism? I've been helping a very nice man of 45 of years old and I'm looking for some new things I can do with him in our time together. any ideas?

A. Autistic people react wonderfully with animals. for instance- i saw a group of severe Autistic teenagers going to swim with dolphins. the effect was amazing! taking him to the zoo, or even to the park to feed ducks, pet dogs, whatever.. could have a great effect on him.
hope i helped!
tell me how it went.

Q. what is a passive smoking? and is it dangerous as an active?

A. Passive smoking is the exposure to cigarettes smoke emitted from cigarettes smoke by other person. It's dangerous and may increase the risk to several diseases similar to active smoking (one's exposure to smoke emitted from the cigarettes he or she is smoking) although the risk is of lower magnitude. Example for passive smoking is children of smokers etc.

You may read more here:http://www.nlm.nih.gov/medlineplus/secondhandsmoke.html

Q. i swim a lot ! what are the advantages of swimming over other sport activities? on what part of the body does it work the most ?

A. its a good workout but your not really going to burn as much calories as a regular work out.

More discussions about activator
References in periodicals archive ?
Neutralization of human extrinsic (tissue type) plasminogen activator in human plasma.
1 of Service Activator, Orchestream has expanded its support of technologies for delivering IP services to include IPsec.
The global agricultural activator adjuvant market is estimated to witness a CAGR of 5.
Manufactured in carbon or stainless steel, making the equipment easy to wash down for applications like food processing and beverage bottling, Spiroflow's bin activator is designed to minimise risk in potentially hazardous or explosive environments.
They then combined these newly identified noise enhancers with known transcription activators in a cell line that serves as a model for HIV latency.
Activator 1000 Odor Control Lemon Lime Formula is a three month treatment that comes in three 8 oz.
We saw opportunity with the styling gel, like we saw with the activator gel market,'' he said.
PAION has initiated early-stage development activities for a series of plasminogen activators and analogues that make use of the exciting pre-clinical findings of Desmoteplase.
8220;Our new liquid septic tank cleaning formula is a great addition to the Activator 1000 product line.
The scientists then injected some mice with the bat-saliva compound, called Desmodus rotundus salivary plasminogen activator (DSPA).
This blended activator standardizes and maximizes patient reaction, increasing specificity in measuring inhibition of thrombin by heparin.
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