The impact of ozone on health-promoting, microbiological, and colour properties ofRubus ideausraspberries

Abstract

The purpose of the study was to define the impact of ozonisation duration and concentration on selected chemical, physical, and microbiological properties of Rubus ideaus red-fruited raspberries of the Polka variety. Raspberry fruit was exposed to a stream of ozone in concentration of 0.3 and 0.9 mg/L over a period of 60 and 120 min. The scope of the study covered the measurements of titratable acidity, soluble solids concentration, and such health-promoting indicators as content of phenol compounds, flavonoids, anthocyanins and vitamins C, total antioxidant activity (TAA) on 0, 4th, and 8th day of storage. The ozone treated fruit had higher level of phenol compounds and demonstrated higher TAA compared to untreated raspberries. The use of ozone made it possible to curb the development of yeast and moulds on the surface of raspberries, in which the dosage of 0.9 mg/L and treatment time of 60 min proved most efficient.Impacto del ozono en las propiedades promotoras de la salud, microbiológicas y de color de la frambuesa Rubus ideaus RESUMEN El presente estudio se propuso definir el impacto que la duración y la concentración de la ozonización tienen sobre determinadas propiedades químicas, físicas y microbiológicas de frambuesas rojas, Rubus ideaus, de la variedad polka. Con este objetivo, la fruta de la frambuesa fue expuesta a un chorro de ozono en concentraciones de 0,3 y 0,9 mg/L durante 60 y 120 minutos. El alcance del estudio permitió medir la acidez valorable, la concentración de sólidos solubles y los indicadores de las propiedades promotoras de la salud, que incluyen el contenido de compuestos fenólicos, flavonoides, antocianinas y vitamina C, así como el total de actividad antioxidante en los días 0, 4 y 8 de almacenamiento. La fruta sometida al tratamiento con ozono presentó niveles más elevados de compuestos fenólicos y de actividad antioxidante en comparación con los mostrados por las frambuesas no tratadas. Además, el uso de ozono ayudó a limitar el crecimiento de levadura y moho en la superficie de las frambuesas, constatándose que el tratamiento con una dosis de ozono de 0.9 mg/L durante 60 minutos fue el más eficiente. ARTICLE HISTORY

Impact of the storage atmosphere enriched with ozone on the quality of Lycopersicon esculentum tomatoes

“…Since activity of low doses of ozone does not cause any damages to epidermis, it does not have a negative impact on the quality of plant products. The obtained results are compliant with the research by Skog and Chu (), where analogically no impact of ozonization on the changes of cucumber surface color was reported, and research carried out by Onopiuk, Półtorak, Moczkowska, et al (), where raspberries were subjected to ozonization.…”

“…Gaseous ozone is a promising solution for extension of tomatoes shell life (O 3 ). Ozone, a triatomic allotrope of oxygen, is characterized by a high oxidation potential of 2.07 V compared to chlorine (1.36 V) and oxygen (1.23 V) that conveys bactericidal and viricidal properties (Analia, Loredo, Guerrero, & Alzamora, 2015;Ong & Ali, 2015;Onopiuk, Półtorak, Moczkowska, Szpicer, & Wierzbicka, 2017). The most important and critical parameters during ozonization are: correct choice of ozone concentration and optimization of process time (food products exposure to ozone) (Ong, Ali, Alderson, & Forney, 2014).…”

Aspectos microbiológicos e físico-químicos de morango exposto ao gás ozônio em diferentes concentrações durante o armazenamento

“…Selma et al (2008) não obtiveram alterações significativas na qualidade sensorial em melão exposto ao ozônio na concentração de 10.000 ppm/30 min. Onopiuk et al (2017) observaram que concentração do ozônio de até 0,9 mg L -1 , por até 120 min, não afetou os atributos sensoriais de framboesa.…”

The impact of biochar dosing with simultaneous fertilization with a biogas plant digestate on the volumetric density of soil

“…One of the key segments of plant agrotechnics is fertilization as mineral and organic fertilizers affect the chemical, biological and physical properties of soils, shaping its productiveness, richness and fertility. The most common organic fertilizer used in agriculture is manure, which is considered one of the best fertilizers in terms of impact on the soil environment [10]. However, due to the increasing share of cereals in the distribution of crops, and the reduction of stocking density in agricultural holdings, its deficit is more and more often experienced.…”

“…Used in farming to improve land properties, biochar is also known as agrocarbonate. Please note that the word "biochar" indicates the biological origin of materials used in the pyrolysis process [9][10][11].…”