Calculator for converting numbers to scientific notation. In scientific notation each number is written in the form: b Ã 10 y, where b is a number between 1 and 10 and y is a positive or negative whole number. The calculator below can be used to covert numbers to normalised scientific notation.
Although there are similarities between bacteria and human cells, there are many differences as well. Antibiotics work by affecting things that bacterial cells have but human cells donât. For example, human cells do not have cell walls, while many types of bacteria do. The antibiotic penicillin works by keeping a bacterium from building a cell wall. Bacteria and human cells also differ in the structure of their cell membranes and the machinery they use to build proteins or copy DNA.
Penicillin was the first antibiotic made available to humans during World War II. It was very effective against gram-positive bacteria, but didnât last long and was susceptible to stomach acid so was wasted inside the body. Amoxicillin is the new and improved version of penicillin that is able to last longer, resist stomach acid, and kill both gram-positive and gram-negative bacteria. It is often used to prevent and treat infections found in cuts and wounds, the mouth, the upper respiratory system, and the bladder. Amoxicillin also has better absorption than another predecessor, Ampicillin.