List of Articles serum urea nitrogen Open Access Article Abstract Page Full-Text 1 - Effects of Thyme Essential Oil and Disodium Fumarate Alone or in Combination on Performance, Blood Metabolites, Ruminal Fermentation and Microbial Communities in Holstein Dairy Cows H. Baraz H. Jahani-Azizabadi O. Azizi 20.1001.1.2251628.2021.11.2.6.0