Composition and structure of cell wall ulvans recovered from Ulva spp. along the Swedish west coast
Artikel i vetenskaplig tidskrift, 2020

The cell wall polysaccharide ulvan was isolated from two species of the seaweed Ulva collected along the Swedish west coast. Acidic extraction was benchmarked against hot water extraction with enzymatic purification and against commercial ulvan. Extracted ulvan contained 11–18 % g/g of ash, some protein (up to 1.3 % g N/g) but minimal colored impurities. The ulvans had high molecular weights (660,000–760,000 g/mol) and were composed of 77–79 % g/g carbohydrates, mainly rhamnose, xylose, glucose, glucuronic acid, and iduronic acid. The extraction protocol and the ulvan source strongly impact the molecular weight and the chemical composition. Acidic extraction caused almost complete desulfation of the isolated ulvan while the other method preserved a significant degree of SO3 substituents. Elemental analysis of ash remaining after thermal degradation showed presence of common mineral elements such as Na, Ca, Mg, Al, and K, but none of the heavy metals Pb, Hg, or As.

Sulfation

Ulvan

Ulva spp.

Structure

Composition

Extraction

Författare

Niklas Wahlström

Kungliga Tekniska Högskolan (KTH)

Filip Nylander

Chalmers, Kemi och kemiteknik, Kemi och biokemi, Fysikalisk kemi

Eric Malmhäll Bah

Chalmers, Biologi och bioteknik, Industriell bioteknik

Karin Sjövold

Chalmers, Kemi och kemiteknik, Kemi och biokemi, Fysikalisk kemi

Ulrica Edlund

Kungliga Tekniska Högskolan (KTH)

Gunnar Westman

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Eva Albers

Chalmers, Biologi och bioteknik, Industriell bioteknik

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 233 115852

Ämneskategorier

Analytisk kemi

Polymerteknologi

Mikrobiologi

DOI

10.1016/j.carbpol.2020.115852

PubMed

32059903

Mer information

Senast uppdaterat

2020-02-21