Legislative Speaker Tina Muña Barnes, is trailed by Sen. Clynton Ridgell and other fellow lawmakers, as they enter the conference room at Adelup on Thursday, April 4, 2019.

According to the World Health Organization (WHO), healthcare professionals have given more than 13 billion COVID-19 vaccine doses since 2021, saving an estimated 14.4 million lives.

In this study, mono-, bi-, and trivalent coumarin-contg. benzoxazine monomers (mono-, di-, and tri-coumarin BZ) were synthesized in high yield and purity by facile Mannich reactions of ...