Choice beef has gotten more expensive, while select has become cheaper. The result is the price difference between the two grades of meat has exploded to 19 cents a pound from 3 cents a pound just a few months ago, helping to make the higher-quality beef more costly for all shoppers.
Apr 6, 2015. It is usually not a chemical reaction. Bubbles are often the result of agitation of toilet water or cleaning chemicals/detergents in the toilet. If the bubbles persist in foamy consistency even in standing water, it means there might be some denatured proteins in urine.
26 SCIENCE CONCEPTS: YEARS 5â10 CHEMICAL REACTIONS Â© Deakin University Explanatory note: Bubbles of carbon dioxide form and attach to the currants and act as floats that raise the currants to the surface. On reaching the surface, the bubbles burst leaving the currants to sink to the bottom once again.