What do mean by refractoriness?
What do mean by refractoriness?
: the insensitivity to further immediate stimulation that develops in irritable and especially nervous tissue as a result of intense or prolonged stimulation.
What is meant by refractoriness of a refractory?
A refractory material or refractory is a material that is resistant to decomposition by heat, pressure, or chemical attack, and retains strength and form at high temperatures. Refractories are polycrystalline, polyphase, inorganic, non-metallic, porous, and heterogeneous. are also considered refractories.
What is the root of refractory?
The word refractory comes from a Latin word meaning “obstinate” and can also be used to mean “not responsive to something.” If you have a cold you can’t shake, you could say you have a refractory cough.
Is refractory a noun?
noun, plural re·frac·to·ries. a material having the ability to retain its physical shape and chemical identity when subjected to high temperatures. refractories, bricks of various shapes used in lining furnaces.
What are the properties of refractories?
Important properties of refractories include chemical composition, bulk density, apparent porosity, apparent specific gravity and strength at atmospheric temperatures. These properties are frequently among those which are used as ‘control points’ in the manufacturing and quality control process.
What are the advantages of refractories?
More heat-resistant than metals, they are used to line the hot surfaces found inside many industrial processes. In addition to being resistant to thermal stress and other physical phenomena induced by heat, refractories can withstand physical wear and corrosion caused by chemical agents.
What are refractory symptoms?
A refractory symptom is one that cannot be adequately controlled despite aggressive efforts to identify a tolerable therapy that does not compromise consciousness (Cherny 1994). A refractory symptom may be subjective and, at times, nonspecific.
What is refractories and its classification?
Refractories are classified according to their physical form. These are the shaped and unshaped refractories. The shaped is commonly known as refractory bricks and the unshaped as monolithic refractories. Brick shapes are usually divided into two types (i) standard shapes and (ii) special shapes.
What is refractory pain?
Intractable pain or refractory pain occurs when pain cannot be adequately controlled despite aggressive measures.
What does refractory heart failure mean?
Refractory CHF here is defined as New York Heart Association (NYHA) functional class III-IV heart failure, despite maximal drug therapy. Before such a diagnosis is made, the patient should be treated with digoxin, diuretics, and a vasodilator.
What is refractory disease?
Refractory disease is defined as disease that is recalcitrant, unresponsive, stubborn, unmanageable or resistant to treatment or cure. While the pathogenesis of refractory endodontic disease is not clearly comprehended,…
definitions – refractory pain. Refractory Pain (n.) 1.(MeSH)Persistent pain that is refractory to some or all forms of treatment.
What is a refractory element?
Refractory elements: The term refractory metals denotes metals with a very high melting point, but it is used somewhat arbitrarily in the metals industry.
What does double refractory mean?
Double refraction. Double refraction, also called birefringence, an optical property in which a single ray of unpolarized light entering an anisotropic medium is split into two rays, each traveling in a different direction.