blocking (redirected from blocking agents)

blocking /block·ing/ (-ing)

1. interruption of an afferent nerve pathway; see block.

2. difficulty in recollection, or interruption of a train of thought or speech, due to emotional factors, usually unconscious.

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blocking

Etymology: ME, blok

1 preventing the transmission of an impulse, such as by an antiadrenergic agent or by the injection of an anesthetic.

2 interrupting an intracellular biosynthetic process, such as by the injection of actinomycin D or the action of an antivitamin.

3 an interruption in the spontaneous flow of speech or thought.

4 repressing an idea or emotion to prevent it from obtruding into the consciousness.

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Blocking

Histology The application of a chemical—e.g., acetylation, methylation, saponification—or an immunologic—e.g., digestion with hyaluronidase or sialidase—method to prevent nonspecific binding of unwanted substances in a reaction
Immunology The reduction or elimination of non-specific binding of an antibody to an epitope, which is accomplished by washing a specimen with the serum of a mammal other than one used in the assay system; blocking is the first step in ELISA
Neurology A phenomenon seen in neuromuscular junction disease—e.g., myasthenia gravis—in which one of 2 single muscle fibers tested for jitter may intermittently fail to fire due to a loss of impulse conduction
Psychiatry An abrupt cessation of thoughts and mental activity or spontaneous flow of thinking or speaking, perceived as an absence or deprivation of thought
Conditions causing Organic brain disease, schizophrenia

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blocking [blok´ing]

1. interruption of an afferent nerve pathway (see block).

2. inhibition of an intracellular biosynthetic process; metabolic block.

3. thought blocking or thought deprivation; sudden cessation of the train of thought or speech, such as may occur in a period of extreme emotion or when a repressed painful thought is approached.

4. casting of tissue blocks in an embedding medium such as paraffin wax so that sections can be cut with a microtome.

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blocking,

n the process of obstructing or deadening, as a nerve.

blocking agent,

n See agent, blocking.

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blocking

1. interruption of an afferent nerve pathway (see block).

2. inhibition of an intracellular biosynthetic process; metabolic block.

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blocking agents

see under alpha, adrenergic, blockade, blocker, ganglionic, muscarinic.

blocking antibody

see blocking antibody.

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blocking 

The mounting of one or a number of lens blanks on a holder to form a unit (termed a 'block') ready for surfacing. The lens blanks are cemented with pitch, wax, etc. See surfacing.

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blocking

Clinical trials The process of establishing defined groups, as in a treatment schedule designed to ensure a specific allocation ratio

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Patient discussion about blocking.

Q. what does a sun block cream do? and what are a UV rays?

A. It blocks out harmful Ultra violet rays from the skin as the previous entries have related; however it can also block your ability to produce vitamin D. If you live in a northerly area or one that receives limited sunlight, its recommended to get at least 15 minutes of sun a day (this is probably best done with minimal sunblock) and according to personnal sun sensitivity. Another thing to keep in mind is that sunblock works best if applied 20 minutes before sun exposure.

Q. my son is 5 and half yrs old.he is having veezing and 75%block in one nose because of adenod.is is curable he has taken steriods for one and half yrs but with not much relief for veezing. then we switched on to ayur medicines,where he had some pigmentation at some places in his body. so again we are back to allopathy. he has one nasal steriod spray now with few other medicines. in his last test, dr, said he has adenod about 75% blcok in one nose, he has prescribed medicines for one month. he has also said that a small surgery can be done to remove adenod. i would like to know how long this surgry wil take and how much of rest he wil have to take. and if this adenod is removed, wil his other problem like veezing be cured? indira rajesh

A. it's a pretty common surgery from what i remember. most of our family has any kind of nasal problem...sinusitis..adenoids...just name it. the surgery is entering through the mouth (under full sedation) and lasering/curetting - removed. it took about a week to recover , eating soft foods..and it worked!