Currently, one of the main problems is the reform of the management system of the agricultural sector, the rational use of land and water resources, as well as the protection of harmful organisms by means of predatory and free-feeding and microbiological preparations.If we solve these problems and protect agricultural crops in a biological way, we
The wave energy converter (WEC) system, which extracts electricity through the relative heave motion of two concentric cylinders, comprises an inner cylinder and a torus-type outer cylinder sliding along the inner cylinder.To maximize the relative heave motion between two cylinders, the natural frequencies of the two cylinders must be precisely tun
Innovations in surgical techniques have improved the esthetic outcome and predictability of root coverage procedures in recent years.A free gingival graft (FGG) augments the attached gingiva, but the compromised blood supply precludes its use oval hexagon glass jar in root coverage.In the surgical technique described in this case report, the FGG ke
The large amount of heavy metal chromium emissions from industrial production, ore smelting and sewage treatment plants have made chromium one of the most widespread heavy metal pollutants, with Cr (VI) being the most toxic.In recent years, people have gradually recognized the great harm of heavy metal chromium pollution, but the research on its pa