Objectives of this study were to (1) determine the starch physicochemical properties of two commercial Tibetan hull-less barley varieties, Beiqing (BQ) and Kangqing (KQ); and (2) understand the relationship between unique properties of the starches, their structures, and impacts of growing conditions. The BQ barleys were grown at a location with lower temperature and less rainfall compared with...

abstract: a combined gas chromatography-mass spectrometry (gc-ms) with headspace solid-phase micro extraction (spme) method has been employed for the analysis of the flavor volatiles of three different rice cultivar, including two modified iranian rice cultivars and hashemi rice cultivar during gelatinization. the proposed combination provided a powerful system for easy and rapid screening of a...

Commingling of rice cultivars commonly occurs during harvest, drying, and storage operations. As different cultivars often have different functional properties, there is a need to study the impact of commingling on these properties. Two long-grain, hybrid cultivars, Clearfield (CL) XL745 and CLXL729, and two long-grain, pure-line cultivars, CL151 and Wells, were used to prepare hybrid/pure-line...

It is suggested that a stable confoTmation of each complex was not formed during the gelatinization of the starch granu]es, but during cooling from a temperature higher than the dissociation temperature of the complex -'hich had formed during the gelatinization process. by differential scanning calorirnetry. Fairly high purity SE have reeently become available, whose position of esterification ...

Standard maize (SMS) and waxy maize starch (WMS) were hydrothermally treated at their residual moisture level (~12 %) by Instantaneous Controlled Pressure Drop process in order to obtain pre-gelatinised starches in a single step. The effect of two parameters of this process, namely the steam pressure level and processing time, on the structural and rheological properties of the native maize sta...

Apios americana is a wild legume-bearing plant with edible tubers. Domestication of Apios is in progress because of the superior nutritional value and health benefits of the tuber. Objectives of this study were to: (1) characterize physicochemical properties of the Apios tuber starch; and (2) understand differences in starch structures and properties between the mother (seed) and child (progeny...

The effects of black tea polyphenol extract (BTPE) on the retrogradation of starches from different plant sources were studied using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). DSC analysis shows that the gelatinization temperature of maize starch and starches from different rice varieties increased with increasing BTPE level. After storage at 4 °C, BTPE at a concentrat...

A comparison was made between the structure and physicochemical properties of starches extracted from five normal and one naked cultivar of oat. There was little difference in the molecular size or polydispersity of the native amylose and amylopectin determined by gel permeation chromatography (GPC), or in the unit chain distribution of isoamylasedebranched amylopectin, where three peaks were r...