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Related Concept Videos

Viscosity01:17

Viscosity

When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
Viscosity01:27

Viscosity

Viscosity is a property of fluids that measures their resistance to flow. It is influenced by factors such as the surface area of contact, the gradient of flow speed, and the fluid's viscosity constant, called the coefficient of viscosity. The coefficient of viscosity, also known as dynamic viscosity, is denoted by the symbol η. It determines the proportionality between the viscous force and the gradient of flow speed.Newton's law of viscosity states that the viscous force on a faster-moving...
Viscosity of Fluid01:19

Viscosity of Fluid

Viscosity measures the resistance a fluid offers to flow and deformation. It results from internal friction between layers of fluid moving relative to one another. Dynamic viscosity, denoted by the Greek letter mu (μ), quantifies the force needed to move one fluid layer over another. For Newtonian fluids like water and air, the relationship between the shearing stress and the rate of shearing strain is linear, meaning their viscosity remains constant regardless of the applied stress.
Colloids and Suspensions01:17

Colloids and Suspensions

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
Colloids03:22

Colloids

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
Tonicity in Animals00:59

Tonicity in Animals

The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...

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Related Experiment Video

Updated: Jun 27, 2026

An Efficient Single-Person Technique for Milk Sampling from Laboratory Mice
04:56

An Efficient Single-Person Technique for Milk Sampling from Laboratory Mice

Published on: March 28, 2025

Assessment of Colostrum Quality in Cattle Using Viscosity Measurements.

Florian Schneider1, Theresa Conze1, Kathrin Büttner2

  • 1Veterinary Clinic for Reproductive Medicine and Neonatology, Faculty of Veterinary Medicine, Justus-Liebig University, Frankfurter Strasse 106, 35392 Giessen, Germany.

Veterinary Sciences
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

Colostrum viscosity, measured by viscometer or funnel, accurately predicts immunoglobulin G (IgG) levels in calves. This practical method helps assess colostrum quality without affecting measurements after freezing.

Keywords:
cattlecolostrumoutflow funnelviscosity

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Last Updated: Jun 27, 2026

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Milk Collection in the Rat Using Capillary Tubes and Estimation of Milk Fat Content by Creamatocrit

Published on: December 16, 2015

Area of Science:

  • Veterinary Medicine
  • Animal Science
  • Immunology

Background:

  • High-quality colostrum is crucial for neonatal calf immunity.
  • Passive transfer of immunity relies on adequate immunoglobulin G (IgG) uptake.
  • Accurate assessment of colostrum quality is vital for calf health.

Purpose of the Study:

  • To evaluate colostrum viscosity as an indicator of colostrum quality.
  • To determine the relationship between viscosity and immunoglobulin G (IgG) concentration.
  • To assess the impact of cryopreservation on viscosity measurements.

Main Methods:

  • Colostrum viscosity was measured using a cone-plate viscometer and an outflow funnel.
  • Immunoglobulin G (IgG) concentrations were quantified via enzyme-linked immunosorbent assay (ELISA).
  • Correlation and Receiver Operating Characteristic (ROC) analyses were performed.

Main Results:

  • Significant positive correlations were found between viscosity, flow time, and IgG concentration.
  • Viscosity measurements were unaffected by cryopreservation (freezing and thawing).
  • The outflow funnel method demonstrated good diagnostic performance for identifying low-quality colostrum (AUC = 0.821).

Conclusions:

  • Colostrum viscosity is a practical and reliable proxy for assessing IgG concentration and colostrum quality.
  • Both viscometer and outflow funnel methods are effective for quality assessment.
  • Cryopreservation does not interfere with colostrum viscosity measurements.