Inadequate storage conditions can affect the sensory, physicochemical, and functional properties of tropical fruits such as Pouteria lucuma; which is a climacteric fruit, with a pleasant aroma and flavor; Peru being the main producer and exporter of this fruit, postharvest storage conditions have not been studied to maintain its properties. The objective of the research was to evaluate the effect of the storage conditions on the main physicochemical components, primary and secondary metabolites, antioxidant, and hypoglycemic capacity during postharvest ripening, under two storage conditions: ambient (29 °C and 70% RH) and climatic chamber (15 °C and 90% RH). Regarding the physicochemical characteristics, the state of maturity influenced acidity, pH, reducing sugars, starch, dietary fiber, firmness, pulp color and epicarp. In climate-controlled storage, glucose is the only metabolite th...

The maximum conversion parameters of sucrose and fructooligosaccharides (FOS) from a clarified yacon extract (1% FOS) to fructose were optimized by using chemical and enzymatic hydrolysis. Chemical hydrolysis was performed using sulfuric and phosphoric acids and enzymatic hydrolysis with inulinase and invertase enzymes. Surface methodology response was employed for optimization hydrolysis. A Box-Behnken design, was used for chemical hydrolysis, where optimal conditions using sulfuric acid were: pH 1, temperature 88,4°C and time of 38,7 min reaching 9,11 g fructose/L extract while with phosphoric acids were: pH 1, temperature 89,9°C and time of 42,2 min obtaining 7,84 g fructose/L extract. To enzymatic hydrolysis a central compose design was used, founding as optimal conditions with inulinase a time of 134 min and a enzymatic concentration of 11,7 U/g FOS and with invertase a time of 12...

Background and objectives: Tarwi is a legume that grows in the Andean region of Peru. This grain is characterized by having a high protein content (similar to 42%). In order to generate added-value products from this resource, the possibility of obtaining tarwi protein hydrolyzates (TPH) with in vitro bioactive properties was evaluated using Alcalase, Neutrase, and Flavourzyme enzymes, acting alone or in combination for up to 240 min. The in vitro evaluated properties were as follows: antioxidant (ABTS assay), antidiabetic (alpha-amylase, alpha-glucosidase and dipeptidyl peptidase IV (DPP-IV) inhibition), and antihypertensive (angiotensin-converting enzyme-I (ACE) inhibition). Findings: The TPH obtained from the different enzyme treatments exhibited important antioxidant, antidiabetic (specially for DPP-IV inhibition), and antihypertensive properties. One-stage treatment using Alcalase f...