Product: Standards for biological activity study
Structure description: Linear chain with mixed linkage of (1,3) and (1,4);
The ratio of tri- and tetra- building block is ~2:1
Properties:
Appearance: white powder, odorless
Starch: not detected (n.d.)
Protein: n.d.
Moisture: < 3%
Arabinoxylan: < 0.5%
Ash: < 0.5%
Beta-glucan: > 97%
Water-solubility: water soluble.
Molecular weight (Mw)and Polydispersity (Pd):
|
Standards |
PS-BA-B50 |
PS-BA-B500 |
PS-BA-B2000 |
PS-BA-B2500 |
|
Mw X 10-4 |
5 |
50 |
200 |
250 |
|
Pd |
1.5 |
1.5 |
1.5 |
1.5 |
Weight average molecular weight Mw was determined by Viscotek triple detector array system equipped
with size exclusion chromatography, light scattering detector using a 90o angle geometry; dn / dc = 0.146
Method of dissolution:
1. Measure a specified amount of standards in a sample bottle;
2. Add distilled water and dissolve it at 90¡æ for 1h, stir the water gently until they dissolve
homogeneously with the water
3. The solution is then allowed to cool to room temperature and the volume adjusted to 50 ml. It can be
preserved at 4 ¡æ for 3 days.
Storage:
Store dry at room temperature in well sealed containers. Under these conditions, the product is stable
for several years.
.