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  4. Effect of Processing on Quality and Safety of Cherry Juice and its By-Products

Effect of Processing on Quality and Safety of Cherry Juice and its By-Products

File(s)
Vila_cornell_0058O_10172.pdf (2.38 MB)
Permanent Link(s)
https://doi.org/10.7298/X4D798KR
https://hdl.handle.net/1813/56925
Collections
Cornell Theses and Dissertations
Author
Vila, Belen Maria
Abstract

Cyanogenic Glycosides (CG) are compounds capable of producing hydrogen cyanide. Processed pits are potential saleable by-products if CG are removed. We evaluated the effect of processing on cherry juice and its by-products by measuring CG and quality attributes. After analysis by HPLC and 1H-NMR, amygdalin was detected in kernels (13.6-23.0 mg/g), in flesh (0.07-0.09 mg/g) and in processed juice (0.06 mg/g). A significant reduction was observed in kernels after juicing (3.3 mg/g) and after 90 minutes of additional heat/acid treatment. Cherry pit oils were also extracted by expeller pressing yielding 2.9-4.4% and presenting comparable quality attributes but different aroma perception. No amygdalin was detected. After 12 weeks, sensory and quality parameters remained relatively stable. Melatonin was also determined by 1H-NMR in different matrices. Quantification was effective between 1-100 ppm for aqueous solutions and supplements. No melatonin was detected in cherry products which may be associated with the detection limit.

Date Issued
2017-08-30
Keywords
Food science
•
Amygdalin
•
Cherries
•
Cyanogenic Glycosides
•
Melatonin
•
NMR
•
HPLC
Committee Chair
Padilla-Zakour, Olga I.
Committee Member
Gavirneni, Srinagesh
Degree Discipline
Food Science and Technology
Degree Name
M.S., Food Science and Technology
Degree Level
Master of Science
Type
dissertation or thesis

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