Coloured units (representing phosphoric acids, purines and pyrimidines) for constructing DNA, t-RNA and RNA helices. Also useful for explaining replication and transcription.
Use this model to show the elementary structure of calcium sulphate (anhydrous) as well as other comparable crystal structures such as silicate and phosphate. The bonds of the elementary structure are identified in white...
Use this unique model to illustrate the structure of graphite with its tightly packed carbon atoms arranged in layers. The clear plexiglass surfaces which separate the layers provide an unobstructed view of the dark carb...
Biology 
ready to ship in 24h only stock ++ Best-Price-Guarantee ++ 30 days withdrawal ++
