Color measurements were performed with a Chroma Meter CR-200
colorimeter (Minolta Co., Osaka, Japan) using a 10mmport size, illuminant
D65 and a 10° standard observer. The instrument was calibrated
with black and white reference tiles and a D65 illuminant source before
the measurements. For zero calibration the black reference was positioned
to prevent light from entering the optic bundle. The observer
viewed a test sample against a multi-colored background on the left
side of the screen for each sample separately to prevent interference
from spatial inhomogeneity (Bramwell & Hurlbert, 1996). As described
by AMSA guidelines (2012), samples with 12 to 15 mm thickness are
sufficient to absorb non-reflected light. Therefore, all sausages (frankfurter,
meat-free sausage and beef ham) were peeled and sliced by
electric slicer into 15 mm-thick pieces (approximately 22 g). For each
treatment, five cylindrical samples (30 mm diameter) were longitudinally
cut and carefully cored to analyze internal color of sausages.
Color measurements were performed with a Chroma Meter CR-200colorimeter (Minolta Co., Osaka, Japan) using a 10mmport size, illuminantD65 and a 10° standard observer. The instrument was calibratedwith black and white reference tiles and a D65 illuminant source beforethe measurements. For zero calibration the black reference was positionedto prevent light from entering the optic bundle. The observerviewed a test sample against a multi-colored background on the leftside of the screen for each sample separately to prevent interferencefrom spatial inhomogeneity (Bramwell & Hurlbert, 1996). As describedby AMSA guidelines (2012), samples with 12 to 15 mm thickness aresufficient to absorb non-reflected light. Therefore, all sausages (frankfurter,meat-free sausage and beef ham) were peeled and sliced byelectric slicer into 15 mm-thick pieces (approximately 22 g). For eachtreatment, five cylindrical samples (30 mm diameter) were longitudinallycut and carefully cored to analyze internal color of sausages.
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