polylactic acid .. help desperately needed ! (1 Viewer)

[miss_pinkii]

does anybody know any good sites that tell u like the steps involved in the production of polylactic acid? including the bacteria and enzymes used ..?

thaanx

 

[pLuvia]

http://en.wikipedia.org/wiki/Polylactic_acid

Try here

May I ask what dot point this is in the syllabus?

 

[miss_pinkii]

i rilli need to know the enzymes and organisms, i.e. bacteria, involved though .. !

its from syllabus dot point 2:

use available evidence to gather and present data from secondary sources and analyse progress in the development and use of a named biopolymer. This analysis should name the specific enzyme(s) used or organism used to synthesise the material and an evaluation of the use or potential use of the polymer produced related to its properties

 

[sikeveo]

miss_pinkii is using PLA rather than the common ones of PHB etc. This should help

http://members.rediff.com/jogsn/BP12.htm
http://www.clinchem.org/cgi/content/full/48/2/378

 

[brilliance**]

i rilli need to know the enzymes and organisms, i.e. bacteria, involved though .. !

its from syllabus dot point 2:

use available evidence to gather and present data from secondary sources and analyse progress in the development and use of a named biopolymer. This analysis should name the specific enzyme(s) used or organism used to synthesise the material and an evaluation of the use or potential use of the polymer produced related to its properties

hey,,
from the research I've gathered ...
the method of production for PLA is fermentation process of starch.
the bacteria used for this is the lactobacillus. I'm not quite sure which species it's in though, because the bacteria used "depends on the feedstock"...
after the bacteria ferments, two types of lactic acid is formed (which I really don't think you need to know), and then there is the open-ringed polymerization process which takes place which polymerizes the lactic acid monomers into PLA.

sorry, I would post up my resources, but most of them are a load of rubbish where only one sentence is useful.... so I think it would be a waste of time quoting out urls.

hope this helps.