A series of 5H-thiazolo[3,2-a]pyrimidin-5-ones were synthesized by the cyclization reactions of S-alkylated derivatives in concentrated H2SO4.Upon treatment of S-alkylated derivatives at different temperatures, intramolecular cyclization to 7-(substituted phenylamino)-5H-thiazolo[3,2-a]pyrimidin-5-ones or sulfonation of cyclized products to sulfoni
A country cannot avoid the era of globalization in life.Countries that do not want to follow, reject and even avoid the era of globalization are tantamount to shutting themselves out from the international world, which in turn will make it difficult for the country to establish cooperative relations with other countries.The era of globalization cer
Heat transfer analysis can be studied efficiently with the help of so-called modern dimensional analysis (MDA), which offers a uniform and easy approach, without requiring in-depth knowledge of the phenomenon by only taking into account variables that may have some influence.After a brief presentation of the advantages of this method (MDA), the aut
BackgroundCovert atrial fibrillation (AF) is a predominant aetiology of embolic stroke of undetermined source (ESUS).Evidence suggested that AF is more frequently detected by implantable loop recorder (ILR) than by conventional monitoring.However, the predictive factors associated with occult AF detected using ILRs are not well established yet.In t
Timing forms the basis of wireless communication systems.Orthogonal frequency division multiplexing (OFDM) technology has strict requirements for synchronization performance, and timing errors lead to interference between subcarriers and symbols.Although cyclic prefix (CP) can relax the timing requirement, high precision timing is still necessary a