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 average cost is $5.60 per square foot. The cost for ceramic tile material is relatively inexpensive. The price for labor, tools and materials, however, is what accounts for the bulk of the expense in installing ceramic tile countertops. Labor is expected to take 10 hours.