An improved method for measurement of gel strength and data on starch gels

Abstract

A method is deHcribed for t he measurem ent of gel s trength that involyes essentially the determination of the shearing for ce r()q uired to fracture gels. vVeigh t is applied to standard disks embedded in t he gels. A standardization of t he method is outlined. Several applications are given to ill ust rate the precision of the method and its use in s tudies of starches of various kind s. No exact co rrelat ion between gel strength and t he granular size or t he amylose o r amylope ctin co n te nts of s tarches was found.

Molecules to Granules: A Comprehensive Starch Review

“…6. The rapid setback and firm gel properties of maize are more like those of isolated amylose; potato gel properties (slower set back and less rigid than maize) are more amylopectinlike, as if amylose effects are moderated by the amylopectin fraction [49]. The starches have 27 and 22% amylose content, respectively.…”

“…The result is a decrease in amount of X-ray scattering from the amorphous regions, compared to that from the crystalline starchktarke 40 (1988) Nr. 2, S. [44][45][46][47][48][49][50] regions. Curiously, the spacing for potato starch is either 90 or 96 8, depending on whether the water was adsorbed from dryness or desorbed from the wet state of water saturation [32].…”

Grading Pectin in Sugar Jellies

“…The requirement, however, that jellies for testing be of the standard and preferably of somewhat higher strength is not found in the method now proposed. Hamer's recent method (6) for measuring the strength of starch gels in grams per square centimeter, by rupturing a gel by means of a disk molded in it, is a method of high precision, but it may not prove suitable for routine control.…”

“…CHOLINE chloride and choline citrate have come into prominence as medicináis, and suitable analytical methods have become necessary, both for assaying the finished products and as a means of control in their production. A method given in the United States Pharmacopoeia (6) for the assay of choline chloride (when used as a reagent, not as a pharmaceutical) is based merely upon the chloride content of the substance. This is not specific for choline and cannot be used for the assay of the citrate nor for the determination of choline in crude preparations obtained during the course of production.…”

Hydrogen Bromine Laminar Flow Electrochemical Cell for High Power and Efficiency Energy Storage Applications

“…The potential drop in the electrolyte can then be described by current conservation in two dimensions. An empirical relation between electrolyte conductivity and concentration is employed (26):…”