THE BACTERIOSTATIC EFFECT OF PRELIMINARY TREATMENT WITH ULTRAVIOLET RADIATION ON BERRIES PRESERVED BY FREEZING

Abstract

The paper presents a method of conservation for the berries by combining a procedure based on physical anabiosis with a procedure based on radio abiosis. Cold operates in a differentiated manner on various types of microorganisms, the storage of refrigerated berries at temperatures between 0 and 4°C leading to the inactivation of mesophilic microorganisms and slows down the rhythms of psychrotrophic and psychrophilic microorganism’s development. As a result of partial bacteriostatic effect provided by refrigeration, a method of preliminary treatment applied to berries is proposed. For this purpose a study is carried out regarding the improvement of the bacteriostatic effect by using a source of ultraviolet radiation on the used material. Also, a device for the berries’ ultraviolet radiation treatment applied before refrigeration is proposed in order to obtain a longer conservation period.