Naslov
INFLUENCE OF WHEAT STARCH MODIFICATION WITH DICARBOXYLIC ACID/ACETANHYDRIDE MIXTURES ON RESISTANT STARCH CONTENT

Autori
Ačkar, Đurđica ; Šubarić, Drago ; Babić, Jurislav ; Jozinović, Antun ; Valek Lendić, Kristina

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts 5th International Dietary Fibre Conference DF 2012 / - Lahti : ICC, 2012, 139-139

ISBN
978-3-9503336-0-2

Skup
5th International Dietary Fibre Conference DF 2012

Mjesto i datum
Rim, Italija, 07.05.2012. - 09.05.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
wheat starch; dicarboxylic acid/acetanhydride mixtures; resistant starch

Sažetak
Resistant starch is recognised as beneficial and functional food ingredient since it has some properties of dietary fibres. Namely, it is not digested in the small intestine, but fermented by intestinal microflora in large bowel into SCFAs that have pH lowering effect on digesta and influence on lipid and carbohydrate metabolism. Resistant starch content is influenced by starch origin (both species and sort characteristics), conditions during plant growth, presence of other food ingredients (proteins, lipids, minerals, etc), type of food preparation (cooking, roasting, frying, steaming, …) and type and extent of starch modification. It is well established that substitution of starch molecules on C-2 position of glucose units sterically hindrance binding starch to active place of α-amylase and increases RS content. However, higher degrees of substitution hindrance starch chain alignment and makes starch more available to the enzymes, hence, reduces RS content. Cross-linking results in increase of RS content due to strengthening inter- and intramolecular bonds. The aim of this research was to investigate influence of wheat starch modification with mixtures of dicarboxylic acids (succinic, glutaric, adipic and azelaic acid) and acetanhydride (acid:anhydride ratio 1:30) in 4, 6 and 8 % (w/w) on resistant starch content. Hence, mixed dicarboxylic acid – acetic acid anhydride has two binding sites and could react both as cross-linking and substituting agent. The results showed that RS content could be decreased or increased by this type of chemical modification, depending both on type of reagent and extent of modification. This implies that modification resulted in wide variety of substituted and cross-linked products.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija, Prehrambena tehnologija

POVEZANOST RADA