Chitosan supplier/methods

hayoaklee at my-deja.com hayoaklee at my-deja.com
Fri Nov 5 03:46:18 EST 1999


In article <7vmuii$k0c$1 at pegasus.csx.cam.ac.uk>,
  C Coward <cc122 at mole.bio.cam.ac.uk> wrote:
> Greetings,
>
> I am investigating the possibility of using a polysaccharide-based
polymer
> to form nanoparticles with DNA via coacervation (eg Leong et al. 1998
> Journal of Controlled Release, vol 53 p.183). I am looking for a
supplier
> of high-quality Chitosan. Sigma/Fluka etc. only supply practical grade
> material that I am reluctant to use (and indeed I observe problems
with
> dissolving the supplied material). Does anyone out there know of a
company
> (preferably near the UK) that could supply my needs?
>
> Also if anyone has information concerning the solubility of chitosan
> (especially in regards to pH) I'd appreciate it - the literature
suggests
> a 0.02% w/v solution pH5.5 in 5 mM NaHOAc0 for a working
concentration but
> in my hands, with the material as supplied large quantities of
insoluble
> material remains.
>
> Cheers in advance.
>
> Chris
>
> --
>
------------------------------------------------------------------------
------
> Dr. Chris Coward                       | Tel: +44 1223 333545
> University of Cambridge                | Fax: +44 1223 766145
> Department of Pathology                | E-mail:
cc122 at mole.bio.cam.ac.uk
> Tennis Court Road, Cambridge.          |
> CB2 1QP                                |
> England                                |
>
------------------------------------------------------------------------
------
> I work for a company named Jakwang Co., Ltd. which is a manufacturer
of water-soluble high quality chitosan. I think we have what you are
looking for. Please contact us at ecjakwang at hanmail.net
Bye.


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