Vine-ripened and ethylene-treated tomatoes (cv. 'Sunny') were ripened at 15, 18, 21, and 25°C and evaluated for color using a colorimeter. Computer models were developed from the objective data to predict changes in color components (value, hue angle, chroma). Computer-predicted results were then converted to sensory equivalent scores to provide a basis for quality management of tomatoes within a handling and distribution system. The models obtained reasonably estimated changes in vine-ripened tomatoes (cv. 'Flora-Dade') ripened at 15, 21, and 2S"C, but were less successful at predicting changes in ethylene-treated fruit.
all rights reserved a knowledge of basic wood properties is required if plantation grown trees are going to be utilised optimally by the forest products industry. two properties of particular interest to the industry are basic density (Bd) and moisture content (Mc). together, Bd and Mc determine the weight of a given volume of wood and both have a strong influence on physical and mechanical properties, both as a raw material and when used in various forest products including lumber, composite panels and paper. 1-4 Both properties are known to vary greatly with location, between stands, between trees within stands and within trees; in addition, Mc varies with time since harvest and seasonally. Knowledge of both properties could greatly improve weight scaling of pulplogs and sawlogs and could be used to sort logs (or loads) based on quality. accurate measurement of Bd and Mc (particularly when above the fibre saturation point) can only be achieved by ovendrying wood samples. Hence, neither can be measured with sufficient speed for inclusion in existing scaling systems.
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