TAILIEUCHUNG - Some factors affecting on determination and measurement of tomato firmness

Firmness is one of the most important factor for determination of tomatoes quality. Distructive measurement of tomato firmness is one of the evaluation methods of fruit firmness. The Universal Instron is most common used machine for measurement of most adeqequate fruit firmness. | Tr. J. of Agriculture and Forestry 22 (1998) 411-418 © TÜBİTAK Some Factors Affecting on Determination and Measurement of Tomato Firmness Ali BATU Gaziosmanpaşa University, Agriculture Faculty, Food Engineering Depratment, 60100, Tokat-TURKEY Received: Abstract: Firmness is one of the most important factor for determination of tomatoes quality. Distructive measurement of tomato firmness is one of the evaluation methods of fruit firmness. The Universal Instron is most common used machine for measurement of most adeqequate fruit firmness. During destructive measurement of firmness considedation of force or deformation values as a firmness of fruits could give incorrect result and taking epicarp strength over deformation values is more accurate to concern the firmness of tomato. Two of possible minimum firmness limits were suggested for tomato fruits at the point of retail marketing or using at home. All 100% marketable fruits should have firmness values above N mm-1 but the Instron values of the tomato -1 mainly consuming stage at home, should have higher than the N mm . The firmness of tomatoes is closely assosiated with acceptability levels of the fruits. Subjective evaluation scores based on finger feel highly and positively correlated and with epicarp strength and firmness values, respectively. A negative and highly significant correlation () exists between deformation values of subjective evaluatoin scores of Liberto variety, but this correlation slightly lower for Criterium and that was . Cuting the skin of mature green tomatoes did not affect on firmness but removing the skin highly effect on it. Both cutting and removing of the skin affected measurement of the firmness of tomatoes harvested at pink stage of maturity. Domates Sertliğinin Belirlenmesi Üzerine Etkili Bazı Faktörler Özet: Domates kalitesinin belirlenmesinde sertlik en önemli faktörlerden birisidir. Ürünün sertlik değerlerinin parçalanarak belirlenmesi

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