A-PSGroup A Streptococcal Polysaccharide (carbohydate)
A-PSAmplitude of Population Spike
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Proximate composition (% dry matter basis) of the test diets Diets Crude Crude Crude Ash protein lipid fiber Reference diet (R) 48.2 8.1 4.2 16.6 Test diets (70% R+30% carbohydrate) A-PS: [alpha]-potato starch 34.1 4.8 2.7 11.9 B-PS: [beta]-potato starch 34.9 4.8 2.9 11.8 B-CS: [beta]-corn starch 34.3 5.1 3.2 11.6 DEX: dextrin 33.9 4.7 3.1 11.6 Diets NFE1 Energy (MJ/kg) 222277 Reference diet (R) 22.9 19.9 Test diets (70% R+30% carbohydrate) A-PS: [alpha]-potato starch 46.5 19.2 B-PS: [beta]-potato starch 45.6 19.2 B-CS: [beta]-corn starch 45.8 19.1 DEX: dextrin 46.7 19.1 (1) Nitrogen free extract = 100-(crude protein+crude lipid+crude fiber+crude ash).
a-PS filaments were melt-spun similarly at a processing temperature of 235[degrees]C and 290[degrees]C.
The TGA scans for the s-PS and a-PS are shown in Fig.
The spinline stresses in the melt-spinning experiments for the a-PS and s-PS are shown in Fig.
4a and 4b, the s-PS and a-PS filaments exhibited a [T.sub.g] at about 98[degrees]C.
The a-PS filaments appear amorphous and show only a single broad amorphous halo.
Birefringence measurements of a-PS and s-PS melt-spun filaments are contained in Fig.
It has long been known that [DELTA]n for a-PS is correlates with spinline stress [sigma], for melt-spun filaments (10).
We found that the a-PS data for different melt-spinning temperatures correlates reasonably well with stress.
A comparison of these two figures shows that the average value of n decreases with decreasing fraction of s-PS (or increasing a-PS) in the blends.
To evaluate effects of molecular weights of s-PS on kinetic behavior of s-PS, blends samples of s-PS/a-PS of different grades of a-PS ([M.sub.w] = 50,000, and 125,000-250,000 g/mol) were prepared and investigated.
Blending s-PS with a-PS led to slight but significant changes in the exponent.