Discovery of DNA. Today, we know that DNA is the genetic material: the molecule that bears genes, is passed from parents to children, and provides instructions for the growth and functioning of living organisms. But scientists didnât always know this.
Dixon Chew is a leading UK manufacturer of Reactive Zirconium Chemicals. Our modern, well-equipped manufacturing facility located in Dewsbury has been built for flexible and reliable processing aimed at minimising order turn round times, maximising yields and reducing our environmental impact.
Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun Ø²Ø±Ú¯ÙÙ, meaning gold-colored.It is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium.aturally occurring zirconium is composed of five isotopes. 90 Zr, 91 Zr, 92 Zr and 94 Zr are stable. 94 Zr can undergo double beta decay (not observed experimentally) with a half-life of more than 1.10Ã10 17 years. 96 Zr has a half-life of 2.4Ã10 19 years, making it the longest-lived radioisotope of zirconium.