Application of Lactic Acid Bacteria for Coating of Wheat Bread to Protect it from Microbial Spoilage

Plant Foods for Human Nutrition - Comparative study of four edible coatings of wheat bread containing lactic acid bacteria showed that coating with Streptococcus salivarius subsp. thermophilus,...     

Ukrainian Dietary Bread with Selenium-Enriched Soya Malt

The production of bread with addition of selenium-enriched soya malt was studied. Processing of this soya malt included soaking of the soya beans in the solution of hydroselenite with concentration 1.5 mg Se/L (20 μg of Se per 1 g of soya beans), then 4 days of beans germination at 20 °C, drying at 50 °C until moisture content 8%, separation from the sprouts and grinding. The soya malt was a powder containing 15–18 μg of Se in 1 g. The accumulated selenium was mainly in the protein fraction of soya malt. Addition of selenium-enriched soya malt to leaven intensified activity of yeasts and lactic acid bacteria. The quality of the wheat bread with selenium-enriched soya malt was better than that of the bread in control. The enriched bread had specific pleasant smell and soft texture. The daily intake of 277 g of bread with the selenium-enriched soya malt, which is added in quantity of 1.0–1.75% to mass of plain flour, ensures the consumption of 30–50% of selenium recommended daily allowance for 17 million population of the northern and northwestern Ukraine.

     

Sealing of sand using spraying and percolating biogrouts for the construction of model aquaculture pond in arid desert

The topic of the paper is the biotechnological sealing of sand using calcium- or iron-based biogrouts. These processes are modeling the sealing of sand during construction of aquaculture pond in the arid desert. The experiments showed that it is possible to conduct biosealing of sand using microbially induced calcium carbonate precipitation performed by the spraying of dead but urease-active bacteria. The sealing was also effective due to ferric hydroxide precipitation in sand after percolation of ferrous-containing solution produced from iron ore and cellulose by the community of acidogenic and iron-reducing bacteria. These treatments of sand can decrease its hydraulic conductivity from the level of 10^?4 m/s to the level of 10^?8 m/s, which is an acceptable level for the aquaculture ponds. The cost of this sealing, especially when the local sources of calcium chloride brain or low grade iron (hydr)oxides of iron ore are applied, could be several times lower than any other known methods of the sand sealing, and could be used in aquaculture practice for the construction of fish, prawns, or algae ponds in sand of the arid deserts.