Crossword clues for coagulation
The Collaborative International Dictionary
Coagulation \Co*ag`u*la"tion\, n. [L. coagulatio.]
The change from a liquid to a thickened, curdlike, insoluble state, not by evaporation, but by some kind of chemical reaction; as, the spontaneous coagulation of freshly drawn blood; the coagulation of milk by rennet, or acid, and the coagulation of egg albumin by heat. Coagulation is generally the change of an albuminous body into an insoluble modification.
The substance or body formed by coagulation.
Douglas Harper's Etymology Dictionary
c.1400, from Latin coagulationem (nominative coagulatio), noun of action from past participle stem of coagulare (see coagulate).
Wiktionary
n. 1 The precipitation of suspended particles as they increase in size (by any of several physical or chemical processes) 2 The process by which blood forms solid clots. 3 Similar solidification of other materials (e.g. of tofu).
WordNet
Wikipedia
Coagulation (also known as clotting) is the process by which blood changes from a liquid to a gel, forming a clot. It potentially results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair. The mechanism of coagulation involves activation, adhesion, and aggregation of platelets along with deposition and maturation of fibrin. Disorders of coagulation are disease states which can result in bleeding ( hemorrhage or bruising) or obstructive clotting ( thrombosis).
Coagulation is highly conserved throughout biology; in all mammals, coagulation involves both a cellular (platelet) and a protein (coagulation factor) component. The system in humans has been the most extensively researched and is the best understood.
Coagulation begins almost instantly after an injury to the blood vessel has damaged the endothelium lining the vessel. Exposure of blood to the space under the endothelium initiates two processes: changes in platelets, and the exposure of subendothilial tissue factor to plasma Factor VII, which ultimately leads to fibrin formation. Platelets immediately form a plug at the site of injury; this is called primary hemostasis. Secondary hemostasis occurs simultaneously: Additional coagulation factors or clotting factors beyond Factor VII (listed below) respond in a complex cascade to form fibrin strands, which strengthen the platelet plug.
Coagulation is the process by which blood forms clots.
Coagulation may also refer to:
- Coagulation (water treatment), in colloid chemistry, a process in which dispersed colloidal particles agglomerate
- Coagulation (milk), the coagulation of milk into curd by rennet or acid
- Mixing of two particles in an aerosol to form a third particle
- Clumping of dust particles in a protoplanetary disk, a possible early stage of planet formation
In water treatment, coagulation occurs when a coagulant is added to water to "destabilize" colloidal suspensions.
In a colloidal suspension, particles will settle very slowly or not at all because the colloidal particles carry surface electrical charges that mutually repel each other. A coagulant (typically a metallic salt) with the opposite charge is added to the water to overcome the repulsive charge and "destabilize" the suspension. For example, the colloidal particles are negatively charged and alum is added as a coagulant to create positively charged ions. Once the repulsive charges have been neutralized ( since opposite charges attract), the van der Waals force will cause the particles to cling together (agglomerate) and form micro floc.
Conversely, flocculation involves the addition of polymers that clump the small, destabilized particles together into larger aggregates so that they can be more easily separated from the water. Flocculation is a physical process and does not involve the neutralization of charge. Coagulation may be used in conjunction with flocculation to assist with water clarification.
Usage examples of "coagulation".
Fibrinogen coagulates more readily than the others and is the only one that changes in the ordinary coagulation of the blood.
What causes the blood to coagulate outside of the blood vessels and what prevents its coagulation inside of these vessels?
Another substance which is necessary to the process of coagulation is the element calcium.
If compounds of calcium are absent from the blood, coagulation does not take place.
The presence of a foreign substance increases the rapidity of coagulation, and it has been observed that bleeding from small wounds is more quickly checked by covering them with linen or cotton fibers.
Through its coagulation, the blood also closes leaks in the small blood vessels.
The purpose of the salts is to prevent coagulation until the blood is diluted with water as in the experiments which follow.
The water dilutes the salts so that coagulation is no longer prevented.
Note that coagulation begins in all parts of the liquid at the same time and that, as the process goes on, the clot shrinks and is drawn toward the center.
The injection of the tumors with a fluid which causes coagulation of the blood, and which does not completely shut off the return current of the circulation through the tumors, has proved fatal in a small percentage of cases.
My previous tests have been made too late to learn the exact rate of coagulation, which may be variable.
He called attention to the fact that the coagulation became more rapid with each interval.
Heat coagulation of muscle protein may become evident at this stage, causing the muscles slowly to contract, and there may be a steady divarication of the thighs with gradually developing flexion of the limbs.
Bopp too accepts that verbs are mixtures obtained by the coagulation of verb with root.
As the opacity and porcelainlike appearance of the glands is probably due to the coagulation of the albumen, I may add, on the authority of Dr.