Biomass combustion in small-scale boilers in Eastern Europe has recently become a very popular heating option.Biomass boilers are gradually replacing old, coal-fired installations, especially in the domestic sector.In comparison with coal, biomass contains more phosphorus, chlorine, and potassium, which may cause the corrosion, slagging, and foulin
What Have We Learned about the Life Cycle of Radio Galaxies from New Radio Surveys
The recurrent activity of radio AGN, with phases of activity alternating with periods of quiescence, has been known since the early studies of these objects.The full relevance of this cycle is emphasised by the requirement, from the AGN feedback scenario, of a recurrent impact of the energy released by the SMBH during the lifetime of the host GARDE
A Megasecopteron From Upper Carboniferous Strata in Spain
In 1962 Professor F.Stockmans, of the Institut Royal des Sciences Naturelles de Belgique, kindly sent me for study two insects from Upper Carboniferous deposits in Northern Spain.One of these (no.94.837), from the PURE CRANBERRY JUICE Mine de Poleiro, is part of a cockroach tegmen, which cannot be placed with certainty even to family level.The othe
Vanishing splendor: a comprehensive review of the decline in the original fish fauna of Lake Victoria
The presence of the non-native Nile perch (Lates niloticus) in Lake Victoria and the resulting ecological transformations have garnered significant attention from the scientific community.However, details regarding the timing, Cast origin, and purpose of the fish introduction have remained elusive.This paper reviews fish fauna changes in Lake Victo