ABSTRACT
Europe is the largest market for fruit juices, representing 55% of the total world imports. Large import and consumer markets such as Belgium, the Netherlands, France, Germany, and the United Kingdom offer opportunities for developing country exporters. A key trend in many of the major fruit juice and nectar markets has been the consumption of less quantity and better quality. Pure fruit juice, which contains no added sugars, has been shown to have no causal relationship with human obesity. Enzymatic treatment is widely used in fruit juice production, where pectolytic enzymes are applied to enhance juice flavor, stability, and yield , since these enzymes digest cell wall materials, reducing viscosity and the water-binding capacity of enzyme-treated mashes. Polyphenoloxidases (PPOs) are part of a large group of enzymes known as oxidoreductases, which oxidize phenols to o-quinones in the presence of molecular oxygen, resulting in brown pigment formation that contributes to processed product darkening.
