Purine contains two carbon-nitrogen rings and four nitrogen atoms. Purines have high meting point. Pyrimidines contains one carbon-nitrogen ring and two nitrogen atoms.They have low melting point. Blue spheres are Nitrogen atoms and Pyrimidines is a one ring molecule. Two Purines are Adenine and Guanine. Two Pyrimidines are Thymine and Uracil.
How Much Does Ceramic Tile Flooring Cost? Ceramic Tile, despite the growing popularity of other flooring types, has remained one of the most popular flooring options on the market. Homeowners love the glossy look and feel of tile in their kitchen, but it can be used for many other applications as well. Before you purchase your ceramic tile flooring, check out the cost guide below. Average maximum cost of ceramic tile flooring materials: $1,200 per 500 square foot section.
The cost of refinishing floors yourself. If you want to refinish floors yourself, youâll have to rent a commercial drum sander for about $60 a day. You will also have to buy stains and sealants, which will typically cost between $125 and $225, according to CostHelper.