Science / Periodic Table of Elements / Cesium (Cs): Atomic number: 55, Atomic mass: 132.9054 g.mol -1, Electronegativity: 0.7, Density: 1.9 g.cm-3 at 20?°C, Melting point: 28.4 ?°C, Boiling point: 669 ?°C, Vanderwaals radius: 0.267 nm, Ionic radius: MORE
Science / Biology / Rna Polymerase: During transcription, an enzyme that attaches to the promoter region of the DNA template, joins nucleotides to form the synthesized strand of RNA and detaches from the template when it reaches the ter MORE
Business / Agriculture / Diethylstibestrol (DES): A synthetic estrogen hormone. DES was used widely in the United States as a growth promoter in cattle and sheep and as a treatment for estrogen-deficiency disorders in veterinary medicine, and for pos MORE