LİMON EKŞİSİ ÜRETİMİ ÜZERİNE BİR ARAŞTIRMA.

In this study, some physical and chemical properties of lemon juice sauce which were produced under atmospheric and vacuum conditions were investigated. After processing of lemon juice into lemon sauces, pH values were decreased about 50%, and titretable acidity values were increased about 8-10 times. The ascorbic acid content was determined 48.36% higher in the vacuum condition compared to the atmospheric condition. The highest total phenolic and carotenoid contents in lemon sauces which were produced in the atmospheric condition, were determined. Both production methods decreased L* and Hueo values, while increased a*, b* and Croma* values of lemon sauces, compared to color values of lemon juices. The highest browning index and the HMF (hydroxymethylfurfural) content were determined in lemon sauces which were produced in the atmospheric condition, while the highest antioxidant activity were determined in lemon sauces which were produced under vacuum condition. Six organic acids (tartaric, quinic, oxalic, malic, citric, and succinic) were determined in the lemon sauces. The highest organic acid contents were found in samples which were produced under the vacuum condition. [ABSTRACT FROM AUTHOR]