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Determination of Amylose: Amylopectin Ratios of Starches [PDF]
Starch - Stärke, 1981 AbstractA method has been developed for the determination of amylose: amylopectin ratios of starches which offers an alternative to iodimetric methods. Starches solubilized in dimethylsulphoxide were debranched with isoamylase and the resulting linear components quantitated by gel permeation chromatography on a column of Sepharose CL‐6B.
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Adsorption of cationic amylopectin on microcrystalline cellulose
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1993Abstract The effects of electrolyte concentration and pH on the adsorption of cationic amylopectin on microcrystalline cellulose were investigated. The adsorbed amount in the pseudo-plateau of the isotherm showed a maximum as a function of the electrolyte concentration. We compared the data with a recent theory on polyelectrolyte adsorption.
van de Steeg, H.G.M. +3 more
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Physical characterisation of amylopectin gels
Polymer Gels and Networks, 1995Abstract Amylopectin is a highly and non-randomly branched polysaccharide and is one of the two main components of starch. Aqueous amylopectin solutions of sufficiently high concentration can form physically crosslinked thermoreversible gels upon cooling to below room temperature.
C. Matin Durrani, Athene M. Donald
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The Dissolution of Cationic Potato Amylopectin
Starch - Stärke, 1997AbstractThe dissolution of a cationic potato amylopectin was studied at low dissolution temperatures 50°–97°C. The dissolution was followed by two methods: (1) iodine binding and (2) the flocculation efficiency with nanosized silica particles. The first method gives us information whether the iodine can penetrate the amylopectin structure or not.
Staffan Wall, Anders Larsson
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Structure of the amylopectin fraction of amylomaize
Carbohydrate Research, 1993The amylopectin fraction (Ap-fraction) from three amylomaize starches (amylose content, 36, 41, and 59%) was fractionated into three amylopectin components (having different molecular size) and a short-chain component by gel-permeation chromatography. The content of the largest amylopectin component was relatively low in a high-amylose maize starch and
Yasuhito Takeda +2 more
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Multiple branching in glycogen and amylopectin
Archives of Biochemistry and Biophysics, 1974Abstract The β-amylase limit dextrins of glycogen and amylopectin are completely debranched by joint action of isoamylase and pullulanase. Action of isoamylase alone results in incomplete debranching as a consequence of the inability of this enzyme to hydrolyze those A-chains that are two glucose units in length (half the total number of A-chains ...
William J. Whelan, J.J. Marshall
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Amylopectin—properties and fine structure
Food Chemistry, 1996Abstract Five amylopectins from different sources were studied to compare their physico-chemical properties and structure. Physicochemical properties such as iodine binding capacity (IBC), maximum absorption ( λ max ) and intrinsic viscosity ([η]) were assayed. Normal corn amylopectin and potato amylopectin gave high values of IBC whereas waxy corn,
Philippe Roger +3 more
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2015
Starch granules consist of two major polyglucans, namely, branched amylopectin and essentially linear amylose. In all nonmutant starches, amylopectin is the major component and is responsible for the internal structure of starch granules, which is the native, semicrystalline form of starch.
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Starch granules consist of two major polyglucans, namely, branched amylopectin and essentially linear amylose. In all nonmutant starches, amylopectin is the major component and is responsible for the internal structure of starch granules, which is the native, semicrystalline form of starch.
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The metabolism of sodium amylopectin sulfate in the rat
Toxicology and Applied Pharmacology, 1969Abstract The metabolism of sodium amylopectin sulfate (SN-263) has been studied in adult rats, 14 C and 35 S-labeled preparations being used. Previous studies have shown that this pepsin inhibitor is an effective antiulcer compound in experimental animals and in man. In the present study, the major fraction of the drug was excreted in the feces and
S.J. Eich, R.E. Ranney
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The building block structure of barley amylopectin
International Journal of Biological Macromolecules, 2011Amylopectin branchpoints are present in amorphous lamellae of starch granules and organised into densely branched areas, referred to as building blocks. One single amylopectin cluster contains several building blocks. This study investigated the building block structure of domains (groups of clusters) and clusters in four different barley genotypes ...
Kristine Koch +4 more
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