Rheology as a Suitable Tool for Quality Control of Collagen Hydrogels
Here, a standard operating procedure (SOP) for determining the quality of collagen hydrogel was developed using oscillatory rheology with a DHR-2 rheometer.
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Preventing Wall Slip in Rheology Experiments
Wall slip is a common problem when testing highly concentrated emulsions or suspensions on a rheometer. It is usually caused by large velocity gradients in a thin region adjacent to the wall. When slip occurs, the measured viscosity can be significantly lower than the actual viscosity of the sample. To overcome this influence, we have introduced a series of roughened surface geometries, such as crosshatched or serrated plates, which significantly improve the contact between the geometry and the sample to reduce slip.
DetailsMonitoring DNA Melting using Nano DSC
In this application note, we used the Nano DSC to monitor ST-DNA melting at a range of concentrations in phosphate buffer.
DetailsFlexural Fatigue Behavior of Woven Fiberglass Composites at Elevated Temperature
This study investigates the influence of operating temperature on the flexural properties and fatigue life of two grades of Garolite woven fiberglass composites using an Electroforce 3330 load frame.
DetailsMust Know Analytical Techniques for Biopharma Developers
eBook Must Know Analytical Techniques for Biopharma Developers A Guide to Improving Biologics Development with Materials Characterization Advancing next generation therapeutics requires reliable characterization of biotherapeutic binding and biomolecular stability. Characterizing biological macromolecules is important for understanding their functions and relationships, which empowers the development of new therapies and treatments. In the case of biotherapeutic…
DetailsSustainable Tire Rubber – A Comparison of Silica and Carbon Black Filled Tread Compounds Using DMA
In this note, viscoelastic properties of SBR mixed with linear and branched butadiene, and carbon and silica filler are systematically investigated using dynamic mechanical analysis.
DetailsIntroduction to Polymer Melt Rheology and its Application in Polymer Processing
Polymer melt rheology aims to understand and quantify the viscous and elastic properties of a polymer so that the process parameters are aligned with the material’s melt properties and vice-versa.
DetailsComparison of Crystallization Behavior of Different Colored Parts Made from Polypropylene Using a Single DSC Experiment
This paper utilizes a single run DSC experiment and analysis of the crystallization data using the Avrami equation to obtain a cursory but useful comparison of crystallization characteristics of different colored polypropylene marker caps purchased from an office supply store.
DetailsThermal Analysis Application Brief Oxidative Stability of Polyethylene Terephthalate
Differential scanning calorimetry (DSC) is an effective technique for rapidly evaluating the oxidative stability of polymers and enables fiber producers to determine optimum formulations.
DetailsDetermination of the Relative Oxidative Stability of Polyethylene Bottle Tops by Differential Scanning Calorimetry (DSC)
Oxidative degradation of polymers is an exothermic process (releases heat) and is detectable by differential scanning calorimetry (DSC). Furthermore, DSC evaluation of polyethylene at elevated temperatures in the presence of oxygen is an effective method for accelerating the onset of degradation so that longer term (shelf life) properties can be predicted and/or compared.
Details“Apparent Melting”: A New Approach to Characterizing Crystalline Structure in Pharmaceutical Materials
The purpose of this paper is to provide a universally acceptable definition of “Melting” and then illustrate that loss of crystalline structure in many materials can be caused by numerous chemical processes other than thermodynamic or “True Melting”.
DetailsIsothermal Titration Calorimetry in Organic Solvent Systems
ITC has recently received increased attention from the field of material science, which necessitates the use of non-aqueous solvent systems. Herein, we elaborate on the development of a representative binding assay that measures the interactions of Ca2+ with a calcium ionophore in a methanol solvent system.
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