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The amount of by-pass cement produced from Egyptian Cement Companies is more than 10% of the total cement production. This dust is harmful on the health of human beings especially for those living near the company. It is known that the preparation and crushing of the raw materials for cement production is a highly expensive step. Accordingly, decreasing the amount of dust reduces the production cost of cement per ton. Many investigations were carried out to solve this problem by recycling this dust in alternative processes (e.g. use it in the production of cement, clay bricks, or as a fertilizer by mixing it with sewage water). Recycling it with raw materials can only be carried out in the wet process of cement production. Unfortunately, up till now these solutions has not yet been sufficient. In this investigation, a trial is made to use such dust as catalytic material in the production of sodium chromate. In this investigation, two feed materials consist of the chromite ore concentrate and soda ash with examined. The suitable pellets (from its mechanical properties point of view) were subjected to firing process at different temperatures, then the roasted pellets were dissolved in hot water and the sodium chromate was extracted from it. Also this paper studied the kinetics of formation of sodium chromate for both pellet types. [ABSTRACT FROM AUTHOR]

Ever since the uncovering of the severe discrepancy of COVID-19 manifestations, irrespective of viral load, scientists have raced to locate and manage factors contributing to the genesis of a critical state. Recent evidence delineates the role of oral dysbiosis in the development of low-grade inflammation, characterized by the increase of inflammatory cytokines common to those fundamental to the development of severe COVID. Furthermore, high periodontopathic bacteria were recorded in severe acute respiratory syndrome in COVID patients, as well as its common provoking comorbidities such as diabetes and hypertension. This can be explained by the immigration and elimination of oral bacteria into the airways, which, in the context of an injured lung, allows for their preferential overgrowth familiar to that, causing the progression to advanced lung diseases. This is why we indicate the promising usage of oral microbiome transplantation as a treatment of oral microbial dysbiosis, not only associated with the worst outcomes of COVID-19 but also in other disorders of low-grade inflammation. OMT for attenuation of severity of COVID-19. COVID-19: Coronavirus disease 2019, MS: Multiple Sclerosis, OMT: oral microbial transplantation, SARS-CoV-2: Severe acute respiratory syndrome coronavirus 2. [Display omitted] [ABSTRACT FROM AUTHOR]