Volume 2 : 3 ratio of the volumes of the sphere and cylinder is credited to Archimedes. The volume of a sphere is the integral of an infinite number of infinitesimally small circular disks of thickness "dx". The calculation for the volume of a sphere with center 0 and radius "r" is as follows. The surface area of the circular disk is formula_10. The radius of the circular disks, defined such that the x-axis cuts perpendicularly through them, is or where y or z can be taken to represent the radius of a disk at a particular x value. Using y
X-Gluc reagent is safe to transport and easy to store. X-Gluc X-Gluc is a chemical compound with the molecular formula CHBrClNO. It is used as a reagent to detect β-glucuronidase, an enzyme produced by the "E. coli" bacterium. It is used to detect "E. coli" contamination in food, water and the urinary tract. In addition, it is widely used in molecular biology experiments to mark and select the expression of target genes (GUS reporter system). It is often preferred to other detection methods because it is fast (24-hour testing), relatively accurate ( <1% false negatives and <5% false positives ) and