treatment processes [8] and as a component for increasing storage
life of fresh-cut fruits [9]. Liu et al. [10] successfully applied chitosan
to remove arsenic from Laminaria japonica Aresch juice. Moreover,
recently studies have been carried out to modify chitosan structure
in order to improve its flocculation/coagulation properties [11,12].
In order to better understand the coagulation process, some
studies have been carried out to analyze the interaction between
chitosan and proteins and carbohydrates. Recently, Boeris et al. [13]
showed that there is an electrostatic interaction between the pro-tein pepsin and the chitosan depending on pH values. Marudova
et al. [14] studied the interaction between chitosan and pectin,
reporting that the action of chitosan as an effective crosslinker
occurs at pH 5.6, being the gel behavior dependent on the degree
of esterification of the pectin. Hiorth et al. [15] also evaluated the
physical features and the temperature dependence of the macro-molecular complexes formed in aqueous mixtures of pectin and
chitosan, looking for pharmaceutical formulations.
Although chitosan applications have been evaluated for some
purposes in the food industry, at the best of our knowledge, there
are no studies reported in the open literature about clarification
of tropical fruit juices, such as passion fruit, using chitosan. In this
way, the study of chitosan as a clarifying agent for passion fruit juice
clarification provides new opportunities to enhance this technique
in the juice processing industry.
The scope of the present work is to evaluate the application
of chitosan as a clarification aid to passion fruit juice process-ing. Moreover, centrifugation and enzymatic treatments were also
treatment processes [8] and as a component for increasing storage
life of fresh-cut fruits [9]. Liu et al. [10] successfully applied chitosan
to remove arsenic from Laminaria japonica Aresch juice. Moreover,
recently studies have been carried out to modify chitosan structure
in order to improve its flocculation/coagulation properties [11,12].
In order to better understand the coagulation process, some
studies have been carried out to analyze the interaction between
chitosan and proteins and carbohydrates. Recently, Boeris et al. [13]
showed that there is an electrostatic interaction between the pro-tein pepsin and the chitosan depending on pH values. Marudova
et al. [14] studied the interaction between chitosan and pectin,
reporting that the action of chitosan as an effective crosslinker
occurs at pH 5.6, being the gel behavior dependent on the degree
of esterification of the pectin. Hiorth et al. [15] also evaluated the
physical features and the temperature dependence of the macro-molecular complexes formed in aqueous mixtures of pectin and
chitosan, looking for pharmaceutical formulations.
Although chitosan applications have been evaluated for some
purposes in the food industry, at the best of our knowledge, there
are no studies reported in the open literature about clarification
of tropical fruit juices, such as passion fruit, using chitosan. In this
way, the study of chitosan as a clarifying agent for passion fruit juice
clarification provides new opportunities to enhance this technique
in the juice processing industry.
The scope of the present work is to evaluate the application
of chitosan as a clarification aid to passion fruit juice process-ing. Moreover, centrifugation and enzymatic treatments were also
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