Freeze drying as a way to preserve the quality of vegetables to create functional products

Relevance. In order to expand the range of food products for the crews of the International Space Station (ISS), studies have been conducted on the specifics of developing natural flavoring vegetable additives in the form of powder for freeze-dried dishes.   The aim is to evaluate new broccoli hybrids as raw materials for the production of natural flavoring vegetable additives in the form of powder for freeze-dried dishes of increased nutritional value and high degree of readiness for consumption, including components of children's, dietary and cosmonaut nutrition.   Methods. The objects of the study were 6 new broccoli hybrids (2 hybrids of domestic and 4 of foreign breeding).   Results. In domestic hybrids F1 (Detskiy delikates, Macho), the average vitamin C content in natural flavoring vegetable additives in the form of freeze-dried powder of a high degree of readiness for consumption was 1.66 times higher than in foreign hybrids. The highest vitamin C content was noted in the domestic hybrid children's delicacy 419.4 mg %. β-carotene was best preserved in the hybrids F1 Detskiy delikates (2.58 mg %), F1 Macho (2.56 mg %), as well as in the hybrid F1 Batavia (2.52 mg %). The amount of sugars in natural flavoring vegetable additives in the form of freeze-dried powder was on average 1.17 times higher in domestic hybrids than in foreign ones. At the same time, some foreign hybrids showed a high level of accumulation. So the largest accumulation of the sum of sugars was in the F1 Lord (12.85 %). A high level of sugar content was also observed in F1 Macho (12.84 %) and F1 Detskiy delikates (11.63 %). The F1 Fiesta accumulated the least nitrates (77.1 mg/kg). According to organoleptic indicators, the F1 Detskiy delikates has been identified. High organoleptic indices were also noted in the F1 Macho and the F1 Batavia.