El presente estudio se centra en la evaluación de la actividad antimicrobiana y antioxidante de extractos de semilla y cáscara de frutos de Cucurbita ficifolia Bouché (calabaza), planta con notables propiedades nutricionales y medicinales, pero poco reconocidas por la población peruana, por lo que presenta principalmente un cultivo incipiente. Las semillas y cáscaras utilizadas se obtuvieron de frutos maduros e inmaduros, estas se deshidrataron y maceraron en frío con agua y etanol al 70% por 15 días, obteniendo así ocho tipos de extractos que fueron evaluados. El protocolo experimental incluye la cuantificación de fenoles por el método de Folin-Ciocalteau, evaluación de actividad antioxidante por el método de inhibición de DPPH (2,2-difenil-1-picrilhidrazil), y evaluación de actividad antimicrobiana frente Escherichia coli (ATCC 35401), Bacillus subtilis (ATCC 6633), Sacch...

Propolis is a resinous substance produced by bees, and various investigations show that it has antioxidant, antimicrobial, and antifungal properties, which is why it is considered a great alternative as a natural preservative for foods and beverages, compared to artificial preservatives. The objective of this research work was to microbiologically evaluate the useful life of peach nectar with propolis as a natural preservative, under the parameters of NTS N°071-MINSA/DIGESA-V.01. The methodology used consisted of preparing nectar samples with different concentrations of propolis (0.03% and 0.05%) and storing them for two, five and nine days at room temperature, subsequently performing the seeding and microbiological count for mesophilic aerobes, coliforms total, molds and yeasts. The results showed a greater antimicrobial effect on total coliforms and molds, for nectar samples with prop...

Ulomoides dermestoides Fairmaire, 1893 (Coleoptera: Tenebrionidae), is a pest of stored grains, aff ecting the germination and commercial value of the seeds. Ricinus communis (Linneo, 1753) (Euphorbiaceae) has compounds with phytotoxic properties such as ricinin (toxic alkaloid), and, ricin (phytotoxic albumin). Th is research aims to evaluate the biocidal eff ect of R. communis essential oil extracted by maceration and Soxhlet methods on larvae of the last stages and adults of U. dermestoides. Th e experimental design consisted of a control group (C) and three experimental groups E1 (33%), E2 (60%), and E3 (70.4%), with four repetitions per treatment. Th e evaluation period was 120 hours in 24-hour intervals. Th e results obtained indicate that treatments E2 and E3 have the greatest biocidal eff ect on larvae and adults of U. dermestoides, recording the highest number of dead individual...

Currently, the use of agrochemicals is necessary for the production of foodstuffs of agroindustrial interest such as tomato (Solanum lycopersicum L.). These are applied mainly as growth stimulants for the crop; however, they also bring with them problems that affect the environment and human health, so better alternatives are being sought to reduce their use; in view of this, chitosan is presented as an option for plant biostimulants. The objective of this research was to study the effect of chitosan extracted from the shell of Romaleon setosum (Molina, 1782) or "hairy crab" on the germination and development of S. lycopersicum seedlings. The extracted chitosan was applied to tomato seeds at concentrations of 1000, 2000 and 3000 mg/l, and germination percentage was evaluated after 10 days and growth indicators every seven days over a three-week period. The results showed that the seeds t...