Talk:Alginic acid

Untitled1
what is the formula of alginic acid? structure of the alginic acid? — Preceding unsigned comment added by 61.1.92.145 (talk) 06:50, 1 September 2005‎
 * ill add this next week. — Preceding unsigned comment added by 218.102.71.167 (talk) 07:17, 19 June 2006‎

Untitled2
Hi, how we can solublise an alginic acid? do you known any method? hanks in advance — Preceding unsigned comment added by 86.41.108.43 (talk) 15:21, 4 February 2007‎

Untitled3
Hi.

In the text it states that alginate (which is the salt-form of alginic acid, NOT the same as alginic acid) is insoluble in water, but this is not the case. It does precipitate at low pH though. If you do a search for Alginate + solubility in google or in scientific litterature you'll see that the solubility varies with pH. I've worked with alginates for ~10 years and it is not a problem to dissolve commercially available alginates (i.e. from SIGMA) at least 20mg/ml in water. Even bacterial alginates from Azotobacter or Pseudomonas spp. with high molecular weight can be dissolved at this concentration, however they form extremely viscous solutions.

Tonje. — Preceding unsigned comment added by 129.241.81.234 (talk) 14:31, 24 July 2007


 * I am deleting the solubility reference in the article, as it is inaccurate. If someone wants to put it back they may feel free to provide a reference to justify doing so. --Steve D (talk) 14:50, 11 December 2008 (UTC)

Untitled4
I propose deleting "Purified forms of alginate are used in antacid preparations such as Gaviscon®, Bisodol®, Asilone®, and Boots Own® tablets."

looks naff should read is used in many pharmaceuticals as part of a modified release system. What does purified forms mean 90% 95% 99% Pharmaceuticals only use uncontaminated items anyway so purified seems a little superfluous. --130.36.75.21 11:30, 17 August 2007 (UTC)

chemicals
In the alglinic acid page the are lots of alginiate salts but dosen't actualy talk of alginic acid. —Preceding unsigned comment added by Ebe123 (talk • contribs) 10:44, 28 March 2010 (UTC)

Biofilms
Alginate is a component of biofilms. That's biologically interesting, and also of clinical significance when the microorganisms are pathogens.

Alginate is the predominant polysaccharide formed by Pseudomonas aeruginosa, and is a significant cause of morbidity and death in cystic fibrosis. (NEJM 366:1978).

I don't have enough information about alginate biofilms to add it to the article now. Its role in cystic fibrosis isn't enough. --Nbauman (talk) 06:35, 25 May 2012 (UTC)

Figure
In the current figure the G-monomer (Guluronic Acid) is represented in the unstable 4C1 conformation. The image should be re-drawn with the G-monomer in it's favored and more stable 1C4 conformation. This is actually not a trivial mistake as many of the properties of alginate are derived from this structural change. (viz. gelation by addition of divalent cations such as Ca2+.) The image's author is notified via the image's own talk page. This needs to be fixed though. El.vegaro (talk) 14:52, 19 November 2012 (UTC)


 * I see the old figure has been removed and a new one with correct conformation replaced it. Very good. El.vegaro (talk) 08:55, 2 December 2012 (UTC)

Acidity (pKa) is 1.5–3.5 according to wikipedia. Could this be harmful for Tooth Enamel?
If not used all the time, only once per week or something?

88.192.242.201 (talk) 08:31, 24 January 2017 (UTC)

THE FORMULA
What the #€77 is the formula?!?! -Muonium777 (talk) 13:56, 19 February 2021 (UTC)