The backbone of xylan
is hydrolyzed by xylanases and other de-branching enzymes .
Fluoro-polymer material used to improve the tribological behavior of the gear teeth and for the noise reduction is the Xylan
1052 dispersion--produced by Whitford Plastics Ltd, the UK, which is applied only on the flanks of teeth gears in one, two and three layers, the thickness of a layer being, after appropriate heat treatment, of 12 to 20 microns.
Enzyme assays were done with oat spelt xylan
from Sigma Chemical Co.
1010 is used on hand trowels, limb loppers, secateurs, electric shears and cutting blades of all types.
Production of polygalacturonase was induced in cultures containing pectin, CMC and xylan
as carbon sources and enzyme inducers.
Hydrolysis of xylan
requires action of different enzymes, two enzymes are responsible for the main change; endo-(Beta)-1-4 xylanase cleaves the backbone to xylo-oligosaacharides and (Beta)-xylosidase hydrolyses them to D-xylose .
Coating the seals with Xylan
1631-A-F1242/-B-F1234 resists the chemical attack, and reduces surface friction which means less force is required to operate the valves.
Adaptation of ethanol fermentation to xylan
-derived sugars is also of high interest in agriculture, since inexpensive and seasonably available corn stover has relatively high xylan
The carbohydrates used as carbon sources and enzyme inducers were: sodium carboxymethyl cellulose (CMC, type 7HF, Aqualon Company), microcrystalline cellulose and xylan
(Sigma Chemical Company).
Recently launched at the SAE show in Detroit, Whitford's new Xylan
2222 range of premium coatings is primarily designed to transform the appearance of the cosmetic limbs of rubber profiles used in automotive weatherstrip applications and fascia surrounds.