The rheological properties of goat milk and goat yogurts were measured using a Physical MCR301 rheometer equipped with a parallel plate of 50 mm diameter (Anton Paar, Graz, Austria) at 25 °C. Samples were gently placed between parallel plates with a gap set at 1.0 mm. The apparent viscosities of the goat milk and yogurts samples were measured with a gradually increasing shear rate from 0.01 to 100.0 s−1 to obtain the flow curve. Viscoelastic properties were determined by frequency sweep test, which performed with a frequency ramp from 0.1 to 10 Hz at a constant strain of 0.5% (within linear viscoelastic region). The test was performed in triplicate for each sample.
Physical mcr 301 rheometer
Manufactured by Anton Paar
Sourced in Austria
The Physical MCR 301 Rheometer is a versatile instrument designed for rheological measurements. It measures the flow and deformation properties of materials, providing insights into their physical characteristics. The rheometer utilizes advanced technology to precisely control and measure the applied stress or strain, enabling users to analyze the rheological behavior of a wide range of materials.
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3 protocols using physical mcr 301 rheometer
1
Rheological Properties of Goat Milk and Yogurt
2
Rheological Properties of Hydrogels
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Rheological properties of hydrogels were examined with Physical MCR 301 Rheometer (Anton Paar). The tested samples were placed on a cone plate (diameter of 4 cm, apex angle of 2°, and clearance 56 m). Measurements were made in the linear viscoelastic region.
3
Rheological Characterization of Hydrogels
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The mechanical strength and viscoelastic parameter of the gels prepared were measured using Anton Paar Physical MCR 301 Rheometer. The experiment was carried out at room temperature using newly made gel in its natural state. A 25 mm parallel plate with a genuine gap of 1 mm was used for the oscillation test. 1% strain and a frequency range of 1–100 rad s−1 were used to quantify the dynamic frequency sweep. The shear strain range for the amplitude sweep was between 0.1 and 1000 Pa, and the angular frequency was fixed at 10 rad s−1. The following settings were made for the dynamic time sweep: fixed frequency: 1 Hz; shear force was applied alternatively at 0.1% at 0–100 s and 100% at 100–200 s up to 7 cycles, and the operation was subsequently repeated up to 6 cycles. Both the viscoelastic moduli are defined as follows: G′ = τ0/γ0 cos δ and G′′ = τ0/γ0 sin δ (where τ0 and γ0 are the amplitudes of stress and strain).
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