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Most anal fissures are caused by stretching of the anal mucous membrane beyond its capability. [3] Superficial or shallow anal fissures look much like a paper cut, and may be hard to detect upon visual inspection; they will generally self-heal within a couple of weeks. However, some anal fissures become chronic and deep and will not heal.
Recrystallization is a method used to purify chemicals by dissolving a mixture of a compound and its impurities, in an appropriate solvent, prior to heating the solution. [1] Following the dissolution of crude product, the mixture will passively cool, yielding a crystallized compound and its impurities as separate entities.
Anal bleaching is a process in which the anus and perineum is lightened. Perineum sunning is a process in which the anus is sun tanned by deliberate exposure to sunlight, resulting in a darkening of the area. [21] A true anal piercing is rare because it may interfere with the function of the anus and cause infections. Surface piercings of the ...
In geology and materials science, a deformation mechanism is a process occurring at a microscopic scale that is responsible for deformation: changes in a material's internal structure, shape and volume. [1] [2] The process involves planar discontinuity and/or displacement of atoms from their original position within a crystal lattice structure.
Anal fissures; Fistulas; Abscesses; Inflammation; Perianal/rectal tumors; Some types of rectal or mucosal prolapses; Rectal cancer; Other anorectal problems; Anoscopy will permit biopsies to be taken, and is used when ligating prolapsed hemorrhoids. It is used in the treatment of warts produced by HPV. The procedure is done on an outpatient basis.
Recrystallization is defined as the process in which grains of a crystal structure come in a new structure or new crystal shape. A precise definition of recrystallization is difficult to state as the process is strongly related to several other processes, most notably recovery and grain growth. In some cases it is difficult to precisely define ...
Anal sphincterotomy is a surgical procedure that involves treating mucosal fissures from the anal canal/sphincter. [ 1 ] [ 2 ] The word is formed from sphincter + otomy (to cut, to separate). [ 3 ]
The crystallization process consists of two major events, nucleation and crystal growth which are driven by thermodynamic properties as well as chemical properties. Nucleation is the step where the solute molecules or atoms dispersed in the solvent start to gather into clusters, on the microscopic scale (elevating solute concentration in a ...