This study aimed to compare the physical properties of mayonnaise with its perceived texture. Model mayonnaises with the same composition were prepared under di#erent emulsifying conditions. Perceived textural properties of mayonnaise, such as hardness, fracturability, viscosity and adhesiveness, were evaluated by trained panels using the quantitative descriptive analysis method. Rheological properties and particle size distribution were measured instrumentally. Pearson's correlation coe$cients between textural attributes and physical properties were calculated. The storage modulus G' in the linear region showed significant correlations ( pῌ*.**+ or pῌ*.*+) with all of the sensory attributes. No significant correlation was observed between sensory attributes and viscosity-related properties, such as apparent viscosities and flow curve parameters. The particle size at +*ῌ cumulative volume had high correlations ( pῌ*.*+ or pῌ*.*/) with all of the sensory attributes studied.
An unknown substance co-eluted with taurine on an amino acid autoanalyzer was found in the aqueous ethanol extract of the oyster Ostrea edulis. The compound was extracted from 100 g of soft parts from 13 specimens, isolated using Dowex 50 (H+ form) and Amberlite CG 400 (OH form) columns, and crystallized from hot 50% aqueous ethanol. The yield was 16 mg as colorless needles. Its chemical and stereochemical structure was determined to be D-cysteamide [(S)-2-amino-3-sulfopropan amide] by FAB mass, 1H and 13C NMR, IR, and CD spectra and elemental analysis. In order to confirm the assigned structure, L-Cysteamide was synthesized from L-cysteine methyl es ter hydrochloride in a crystalline form. The synthetic compound was identical with a natural one in mobilities on the amino acid autoanalyzer and TLC and in FAB mass, 'H and 13C NMR spectra but showed a reverse Cotton effect in the CD spectrum.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.