Koalas were declared endangered in eastern Australia on Friday, with more and more koalas dying from disease, habitat loss, and other threats. Earlier, the koala was considered a vulnerable species, and the Commonwealth Department of the Environment…
Zinc oxide can be described as an oxide or zinc. Its chemical formula is ZnO. It is insoluble when it comes into contact with water. However, it can be dissolved in acidic and strong bases. Purity: 99.5%Pebble size: 20 nm-200 nm Zinc Oxide powder:…
French scientists have confirmed for the first time through genome sequencing that the "deltacron" variant of the new coronavirus that has previously attracted a lot of attention does exist, which combines the mutations in the new coronavirus delta v…