Fecha registrada: May 27 2014

Duration: 56 minutes 34 seconds

This webinar is of interest to anyone involved in the rheological testing of complex fluid formulations which are low viscosity and weakly-structured. DLS microrheology is a technique which is particularly applicable to polymers and proteins in solution, where access to high frequency data extends the viscoelastic measurement range into process-relevant timescales, and is key to understanding short timescale dynamics of these systems. The webinar discusses the basic principles behind DLS Microrheology with relevant application examples relating to proteins and polymer solutions.

Table of contents
1. Introduction to DLS Microrheology and its Applications
01:43
2. Introduction to DLS Micro-rheology and its Applications
00:14
3. Overview
00:39
4. Microrheology
00:47
5. Benefits of Microrheology
01:06
6. DLS Microrheology
01:03
7. Brownian Motion, Particle Size and Viscosity
00:00
8. Brownian Motion, Particle Size and Viscosity
00:19
9. DLS Instrument Components
01:30
10. Correlation in Dynamic Light Scattering
00:11
11. Correlation in Dynamic Light Scattering
00:34
12. Correlation: Low viscosity gives rapid fluctuations
00:43
13. Correlation:Low Viscosity, Rapid fluctuations
00:21
14. Correlation:Low Viscosity, Rapid Fluctuations
00:25
15. Correlation:Low Viscosity, Rapid Fluctuations
00:07
16. Correlation:Low Viscosity, Rapid Fluctuations
00:02
17. Correlation:Low Viscosity, Rapid Fluctuations
00:21
18. Intensity Fluctuations and Brownian Motion
00:27
19. Correlation Functions
01:08
20. Mean Square Displacement
00:43
21. MSD Time Dependence
00:00
22. Extraction of Rheological Data
04:28
23. Extraction of Rheological Data
01:15
24. Extraction of Rheological Data
02:53
25. Extraction of Rheological Data
00:00
26. Making a Measurement
03:22
27. Ensuring Single Scattering
01:54
28. Evaluating Sample/Tracer interaction
01:55
29. Effect of probe chemistry – protein solution (BSA)
02:29
30. Tracer Size Measurement
01:12
31. Rotational Rheometry - A complementary tool
01:42
32. Rotational Rheometery – A complementary tool
00:42
33. Effect of Particle Size on Frequency Range
01:41
34. Example 1 – Polyacrylamide Solution
02:26
35. Example 2 – Shear thinning of Protein solutions
02:08
36. Example 3 - Denaturation of Protein solution
01:37
37. How to get DLS Microrheology?
01:52
38. Conclusions
01:32
39. Any Questions?
10:12
40. Contact Information
00:51