What attenuation means?
Definition of attenuation : the act or process of attenuating something or the state of being attenuated: such as. a : a lessening in amount, force, magnitude, or value : weakening Sound can travel thousands of kilometers in this planar acoustic waveguide with little attenuation.— David Ritchie.
What is the synonym of attenuate?
Synonyms & Near Synonyms for attenuate. attenuated, elongate. (or elongated), linear.
What does too attenuated mean?
1 : lessened or weakened (as in amount, force, or magnitude) “It wasn’t that there was less effect, or an attenuated effect.
What does attenuated mean in biology?
Listen to pronunciation. (uh-TEN-yoo-way-ted) Weakened or thinned. Attenuated strains of disease-causing bacteria and viruses are often used as vaccines.
What does attenuate mean in medicine?
Weakened or thinned. Attenuated strains of disease-causing bacteria and viruses are often used as vaccines. The weakened strains are used as vaccines because they stimulate a protective immune response while causing no disease or only mild disease in the person receiving the vaccine.
What is attenuated in microbiology?
(noun) Attenuation (in genetics) is a proposed mechanism of control in some bacterial operons that results in premature termination of transcription. It is based on the fact that, in bacteria, transcription and translation can and do proceed simultaneously.
What is a tincture made of?
Tinctures are concentrated herbal extracts made by soaking the bark, berries, leaves (dried or fresh), or roots from one or more plants in alcohol or vinegar. The alcohol or vinegar pulls out the active ingredients in the plant parts, concentrating them as a liquid.
Which is the best solvent for herbal extraction?
Methanol was identified as the most effective solvent for the extraction, resulting in the highest extraction yield (33.2%) as well as the highest content of phenolic (13.36 mg GAE/g DW), flavonoid (1.92 mg QE/g DW), alkaloid (1.40 mg AE/g DW), and terpenoids (1.25%, w/w).
What is attenuated tissue?
The amplitude and intensity of ultrasound waves decrease as they travel through tissue, a phenomenon known as attenuation. Given a fixed propagation distance, attenuation affects high frequency ultrasound waves to a greater degree than lower frequency waves.
What is attenuated antigen?
An attenuated vaccine (or a live attenuated vaccine, LAV) is a vaccine created by reducing the virulence of a pathogen, but still keeping it viable (or “live”). Attenuation takes an infectious agent and alters it so that it becomes harmless or less virulent.
What is decoction and concoction?
As nouns the difference between concoction and decoction is that concoction is (obsolete) digestion (of food etc) while decoctionis an extraction or essence of something, obtained by boiling it down.
What is the meaning of attenuated?
1 : lessened or weakened (as in amount, force, or magnitude) “It wasn’t that there was less effect, or an attenuated effect. There was no effect at all.” — Roger Simon … people who are not, even in Facebook’s attenuated sense of the word, your “friends” … — Robert Wright But I am aware that my connection to Russia is an attenuated connection.
What does it mean to attenuate radio waves?
Radio waves can become attenuated by the shape of the landscape, by foliage, by atmospheric conditions, and simply by distance. Factory workers and rock musicians often use noise-attenuating ear plugs to save their hearing. To attenuate something isn’t to stop it, just to tone it down. “Attenuated.”
How does a friendship become attenuated?
A friendship can become attenuated if neither person bothers to keep in touch. Radio waves can become attenuated by the shape of the landscape, by foliage, by atmospheric conditions, and simply by distance. Factory workers and rock musicians often use noise-attenuating ear plugs to save their hearing.