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{{other uses|Paste (disambiguation)}} |
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In [[physics]], a '''paste''' is a substance that behaves as a [[solid]] until a sufficiently large load or [[stress (physics)|stress]] is applied, at which point it flows like a [[fluid]]. In [[rheology|rheological]] terms, a paste is an example of a [[Bingham plastic]] [[fluid]]. |
In [[physics]], a '''paste''' is a substance that behaves as a [[solid]] until a sufficiently large load or [[stress (physics)|stress]] is applied, at which point it flows like a [[fluid]]. In [[rheology|rheological]] terms, a paste is an example of a [[Bingham plastic]] [[fluid]]. |
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Pastes typically consist of a [[suspension (chemistry)|suspension]] of [[granular material]] in a background fluid. The individual grains are jammed together like [[sand]] on a [[beach]], forming a disordered, [[glass]]y or [[amorphous]] structure, and giving pastes their solid-like character. It is this "jamming together" that gives pastes some of their most unusual properties; this causes paste to demonstrate properties of [[fragile matter]]. |
Pastes typically consist of a [[suspension (chemistry)|suspension]] of [[granular material]] in a background fluid. The individual grains are jammed together like [[sand]] on a [[beach]], forming a disordered, [[glass]]y or [[amorphous]] structure, and giving pastes their solid-like character. It is this "jamming together" that gives pastes some of their most unusual properties; this causes paste to demonstrate properties of [[fragile matter]]. |
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In pharmacology, '''paste''' is basic [[pharmaceutical form]]. It consists of fatty base (e.g., [[petroleum jelly]]) and at least 25% solid substance (e.g., [[zinc oxide]]). |
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Examples include [[starch]] pastes, [[toothpaste]], [[Mustard (condiment)|mustard]], and [[putty]]. |
Examples include [[starch]] pastes, [[toothpaste]], [[Mustard (condiment)|mustard]], and [[putty]]. |
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In pharmacology, '''paste''' is a basic [[pharmaceutical form]]. It consists of a fatty base (e.g., [[petroleum jelly]]) and at least 25% of a solid substance (e.g., [[zinc oxide]]). Pharmaceutical pastes are typically intended for external application to the skin. They are usually thick and do not melt at physiologic temperatures.<ref>Juch, R & Rufli, Th & Surber, Christian. (1994). [https://www.researchgate.net/publication/15325051_Pastes_What_Do_They_Contain_How_Do_They_Work Pastes: What Do They Contain? How Do They Work?]. ''Dermatology'' (Basel, Switzerland). '''189'''. 373-7. {{doi|10.1159/000246882}}.</ref> |
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Inphysics, a paste is a substance that behaves as a solid until a sufficiently large load or stress is applied, at which point it flows like a fluid. In rheological terms, a paste is an example of a Bingham plastic fluid.
Pastes typically consist of a suspensionofgranular material in a background fluid. The individual grains are jammed together like sand on a beach, forming a disordered, glassyoramorphous structure, and giving pastes their solid-like character. It is this "jamming together" that gives pastes some of their most unusual properties; this causes paste to demonstrate properties of fragile matter.
Examples include starch pastes, toothpaste, mustard, and putty.
In pharmacology, paste is a basic pharmaceutical form. It consists of a fatty base (e.g., petroleum jelly) and at least 25% of a solid substance (e.g., zinc oxide). Pharmaceutical pastes are typically intended for external application to the skin. They are usually thick and do not melt at physiologic temperatures.[1]
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