The history of the study of bloodsucking mosquitoes, sand flies, black flies, and horse flies in St. Petersburg and Leningrad Province is observed. At present, 38 mosquito species of 5 genera, 67 black fly species of 17 genera, 24 species of bloodsucking sand flies of the genus Culicoides, and 36 horse fly species of 6 genera were revealed in the territory of the region. The analysis of 267 col...

Inadequate and lacking sanitation and wastewater treatment systems can lead to the spreading of diarrhoeal diseases. One contributing factor in the lack of such treatment systems is the lack of economic incentives for stakeholders throughout the service chain. However, the organic fraction of the waste is high in valuable plant nutrients and could be reused in agriculture and as animal feed. Fo...

Thorne and Kidder give expressions which allow for analytical estimates of the “kick”, i.e. the recoil, produced from asymmetrical gravitational radiation during the interaction of black holes, or in fact any gravitating compact bodies. (The Thorne-Kidder formula uses momentum flux calculations based on the linearized General Relativity of gravitational radiation.) We specifically treat kicks a...

plants firing fuel oil produce huge quantities of fly ash as solid waste, which needs to becharacterized prior to its proper management. it is worth mentioning that the published literature lackcomprehensive information on the characteristics of such fly ash. characteristics of fuel oil fly ash producedat selected power (pp) and water desalination (dp) plants were determined. the results showed...

There is lack of evidence on the black soldier fly (Hermetia Illucens L.) and its use as a biological control waste recycle agent. Unknown information related with mating ovipositional activities. The aim this research to determine reproductive profile manure Black Soldier Fly through different rearing substrate ruminant feed. A total 4 treatments replicates were used in experiment. treatment d...

Concrete performs well when exposed to various atmospheric conditions, water, soil, and many other chemical exposures. However, some chemical environments or even water can deteriorate high-quality concrete. Paper considers the usefulness of current fly ash concrete technology and prevention techniques, and advances a new approach for making concrete resist the deleterious effects of corrosion....