Mutations at the rug5 (rugosus5) locus have been used to elucidate the role of the major soluble isoform of starch synthase II (SSII) in amylopectin synthesis in the developing pea embryo. The SSII gene maps to the rug5 locus, and the gene in one of three rug5 mutant lines has been shown to carry a base pair substitution that introduces a stop codon into the open reading frame. All three mutant...

The problem of branching in glycogen and starch has been the subject of interest ever since Cori and Cori (I, 2) isolated the phosphorolytic enzyme from animal tissues and Hanes (3) found a similar enzyme in plants. Examination of polysaccharides produced by these enzymes when glucose-l-phosphate was used as a substrate showed that, similar to amylose, they had a linear configuration in which t...

Amylopectin concentration in barley endosperm has important effects on grain quality and end-use. In this study, quantitative trait locus (QTL) analysis together with genome-wide association studies (GWAS) were performed to identify markers linked to grain amylopectin content respectively using a doubled haploid (DH) population of 178 lines and a collection of 185 diverse barley germplasms both...

Statistically and causally meaningful relationships are established between starch molecular structure (the molecular distribution of branched starch and the chain length distribution of debranched starch) and texture (hardness and stickiness) of cooked rice grains. The amounts of amylose chains with degree of polymerization (DP) 100-20,000, and of long amylopectin chains, positively correlated...

This research study analysed the rheological properties of potato amylose and potato amylopectin in binary solutions of the following water and dimethyl sulfoxide concentrations: 90% DMSO (1), 80% DMSO (2) and 50% DMSO (3), with preparation methodology involving the dissolution at the temperature of 98°C. The studies of dynamic light scattering on the biopolymer coils and the determination of m...

Abstract Biodegradable materials have lower production costs, they are easy to work with, and environmentally friendly too. Bioplastics can use natural organic wastes, such as nopal, sargassum, banana peel, corn, algae a variety of products. There is also the synthesis characterization these new bioplastics, however, very little known their electronic structure materials. This study analyzes in...

Starches were isolated from grains of waxy, heterowaxy, and normal sorghum. To study the relationship between starch structure and functionality and guide applications of these starches, amylose content, amylopectin chain-length distributions, gelatinization and retrogradation, pasting properties, dynamic rheological properties, and in vitro enzyme digestion of raw starches were analyzed. Heter...

A procedure was developed for the separation and purification of amylose and amylopectin isolated from cotton leaves. Cotton leaves were homogenized in 0.02 molar phosphate buffer at pH 7.0 containing HgCl(2) plus toluene. Crude starch granules were collected by centrifugation and partially purified by treating with acetone and toluene. The starch granules were then dispersed in dimethylsulfoxi...

16 Starches with different amylopectin contents and different molecular sizes prepared 17 using acid hydrolysis were hydrophobically modified using octenylsuccinic anhydride 18 (OSA). The OSA-modified starches were used as surfactants to stabilize emulsions of 19 β-carotene and canola oil dispersed in water. The objective of this study is to 20 investigate the relationship between starch molecu...