Bioactive Protecting Coating of Guar Gum with Thyme Oil to Extend Shelf Life of Tilapia (<i>Oreoschromis niloticus</i>) Fillets oleh Xochitl Ruelas-Chacon, Alfredo Aguilar-González, María de la Luz Reyes-Vega, René Darío Peralta-Rodríguez, José Corona-Flores, Oscar Noé Rebolloso-Padilla, Antonio Francisco Aguilera-Carbo