What does high thixotropy mean?

What does high thixotropy mean?

Thixotropy is a time-dependent shear thinning property. Certain gels or fluids that are thick or viscous under static conditions will flow (become thinner, less viscous) over time when shaken, agitated, shear-stressed, or otherwise stressed (time-dependent viscosity).

What is Syneresis thixotropy?

Syneresis is the extraction or expulsion of a liquid from a gel, as when serum drains from a contracting clot of blood. Thixotropy is a time-dependent shear thinning property.

What is muscle thixotropy?

Thixotropy is the property of some gels to turn into liquids under certain conditions. There is a small degree of stiffness in the normal resting muscle that disappears on voluntary movement or passive muscle stretch. Thixotropy is the physiological term used to describe this component of muscle tone.

What is formulation thixotropy?

Chapter: Pharmaceutical Drugs and Dosage: Rheology. Thixotropy is the property of some non-Newtonian fluids to show a time-dependent change in viscosity. When sheared by mixing, such as simple shaking, the matrix relaxes and forms a solution with the charac-teristics of a liquid dosage form for ease of use.

What is thixotropy phenomenon?

Thixotropy is a phenomenon where the viscosity of some fluids depends on the time of share rate, and hence, thixotropy is a time-dependent phenomenon (Koleske, 2012; Mezger, 2014; Wilczyński, 2001). Thus, the viscosity of thixotropic fluids decreases with time.

How does thixotropy work?

‘Thixotropy’ is shear thinning property; when an alloy is sheared it thins, but when it is allowed to stand it thickens again. This behavior is associated with the breakup of agglomerates of solid particles under shear and their reformation when the shear is removed.

What is weeping of gels?

The spontaneous outcome of internal liquid phase from gels is called weeping of gels or syneresis.

Are muscles thixotropic?

Relaxed skeletal muscle has an inbuilt resistance to movement. In particular, the resistance manifests itself as a substantial stiffness for small movements. Because the resistance to movement increases with time at rest and is reduced by movement, this behavior has become known as muscle thixotropy.

How do you measure thixotropy?

Thixotropy can be quantitatively measured using a rotational rheometer. The most commonly used testing geometries are 20-40 mm parallel plate or a cup/rotor geometry.

What is thixotropy in pharmacy Slideshare?

Definition of Thixotropy: It is the decrease in viscosity as a function of time upon shearing, then recovery of original viscosity as a function of time without shearing.

What is thixotropy Slideshare?

What is the difference between thixotropic and pseudoplastic fluids?

The key difference between thixotropic and pseudoplastic is that the viscosity of thixotropic fluids decreases upon applying a force, whereas the viscosity of pseudoplastic fluids increases upon applying a force. 1. Kelly, David. “Non-Newtonian Fluids.”

What is the difference between Bingham and pseudoplastic fluid?

2.5.2 Pseudoplastic Fluid In contrast to a Bingham fluid, a pseudoplastic fluid is a fluid that increases viscosity as force is applied. A typical example is a suspension of cornstarch in water with a concentration of one to one. This cornstarch behaves like water when no force is applied; however, it is solidified as force is applied.

What is thixotropy of connective tissue?

Rolf’s own explanation was that connective tissue is a colloidal substance in which the ground substance can be influenced by the application of energy (heat or mechanical pressure) to change its aggregate form from a more dense ‘gel’ state to a more fluid ‘sol’ state. But thixotropy is minor, slow, and temporary, and fascia is too tough to change.

What is pseudoplastic fluid?

Pseduoplastic fluids are liquids or gases whose viscosity increase upon application of a force. The opposite type of fluid for pseudoplastic is Bingham fluid. It is a time-dependent fluid because the shear stress applied to the fluid during a particular amount of time is taken to determine the change in viscosity.