Why is rheology important in pharmacy?

Rheology is therefore crucially important as it will directly affect the way a drug is formulated and developed, the quality of the raw and finished product, the drug efficacy, the way a patient adheres to the prescribed drug, and the overall healthcare cost.

What is the importance of rheology?

Researchers believe that rheological characterization is essential for the development, optimization, and processing of foods. Food rheology also determines the food texture. Rheological flow properties deal with the perception of food when we touch or put it into our mouth.

What is meant by rheology in physical pharmaceutics?

Pharmaceutics, Pharmacy Notes. Rheology is the science which deals with flow of the liquid and deformation of the solid. The term 'rheology' was derived from the Greek words rheo (flow) and logos (science).

Why is viscosity important in pharmaceutical industry?

Viscosity is a key indicator of quality in a wide range of biotech applications, from pharmaceuticals and mechanical devices to medical laboratories and research centers. Viscosity measurement is important when it comes to determining a wide range of data points—such as at what point can a fluid flow through a syringe?

What is rheology and its application?

Rheology is science which treats the deformation and flow of materials. The science of rheology is applied to the physics, chemistry, engineering, medicine, dentistry, pharmacy, biology and so on. Classical theory of elasticity treats the elastic solid which is accordant to Hooke's law [ 1].

RHEOLOGY | PHYSICAL PHARMACY | PART-1 | VISCOSITY | FLUIDITY |

What is medical rheology?

[re-ol´ah-je] the science of the deformation and flow of matter, such as the flow of blood through the heart and blood vessels.

Why is rheology important in cosmetics?

Rheological measurements provide information about storage stability, processability or flow properties of liquid and semi-solid formulations, which are essential for quality control and further product development.

What is viscosity in pharmacy?

Viscosity is that property of liquids that tells you how much resistance they have to flowing; whether it is a cough syrup, an ointment, or whatever. The ability to test for viscosity is a very important practice by quality control throughout industries.

What is viscometer in pharmacy?

A viscometer (also called viscosimeter) is an instrument used to measure the viscosity of a fluid. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used.

Why is viscosity test important?

Gathering viscosity data on a material gives manufacturers the ability to predict how the material will behave in the real world. For example: if toothpaste does not have the correct viscosity, it can either be too difficult to pump out from the tube, or pump out too much.

What are the examples of rheology?

Many physiological materials and fluids exhibit complicated rheology. Within the eye, examples include the vitreous humour, the liquid in the tear film, and the blood in capillaries.

What is rheological behavior?

Rheology generally accounts for the behavior of non-Newtonian fluids, by characterizing the minimum number of functions that are needed to relate stresses with rate of change of strain or strain rates.

What is rheology modifiers in cosmetics?

Rheology modifiers are often referred to as thickeners, and whilst increasing the apparent viscosity will confer a feeling of “quality” to the formulation, this is only one aspect of rheological control. The product itself can be Newtonian or pseudoplastic, thixotropic, be a ringing gel or a stringy flowable liquid.

Why is the rheological property important to understand polymers?

Understanding the rheological properties of polymers through laboratory testing can help to optimize products and process conditions, thereby saving costs and minimizing potential waste.

What does rheology depend on?

Rheology is the scientific field that encompasses the flow phenomena of matter (solids, liquids, and gases) and notably involves time-dependent behavior under the influence of stresses.

Is viscosity a rheological property?

The property of rheology is viscosity, which is defined as the measure of the resistance of a fluid to gradual deformation by shear or tension.

What is rheometer testing?

Rheology testing can determine if materials are processed properly with minimal product degradation. Rheological tests to measure the viscosity of a polymer ranging from single point tests to variable shear-rate tests.

What is rheology Slideshare?

DEFINITION OF RHEOLOGY  Rheology is the science/physics that concerns with the flow of liquids and the deformation of solids.  Study of flow properties of liquids is important for pharmacist working in the manufacture of several dosage forms, viz., simple liquids, gels, ointments, creams, and pastes.

What are the methods determining the viscosity of pharmaceutical formulation?

What are the applications of viscosity?

What is the principle of viscosity?

The principle of Viscosity is stated here: When a layer of Liquid is subjected to move upon a surface or another layer of the same Liquid, the Fluid particles tend to oppose such movement; this resisting force developed by a Liquid is called Viscosity.

Is lotion Pseudoplastic fluid?

According to the ana - lysis of a down-curve at lower shear rates (0–600 s-1) it was con- firmed that samples of body lotions are pseudoplastic sub- stances and the pow- er law model, t = Kg·p, was used (regression coefficients higher than 0.98) to deter- mine consistency parameter, K, and flow index, p.

What is rheology testing?

Rheology testing is measuring the deformation of matter under the influence of imposed stress, by analysing the internal response of materials to forces.

What are rheological properties of fluids?

Rheological properties refer to the Bingham plastic fluid parameters such as yield point (YP) and plastic viscosity (PV). It is one of the several flow characteristics of drilling fluid, workover fluid or completion fluid or cement.

What is the relationship between rheology and viscosity of fluids?

Rheology is defined as the study of the deformation and flow of a fluid. It is an important property of a molten polymer; it relates the viscosity with the temperature and shear rate, and is consequently linked to polymer processability.