There are multiple ways to count the bacteria colonies growing in a Petri dish, from simple counting by hand, to complex machinery designed to electronically measure colony growth. Depending on how many Petri dishes need to be counted, and how often measurement is taking place, different users will benefit from different counting methods.Know More
Counting by hand is appropriate for most lab settings, since the only resource required is time. It is both economical and easy; anyone capable of counting and recording spots observed in the Petri dish is capable of counting colonies via this method. There are some simple tools, including markers and counters operated by manual clicks, that can aid in the recording process. The downside of counting by hand is that it is time-consuming and can be prone to human error.
There are machines that have been designed specifically to measure the number of colonies present in a Petri dish. These machines provide users with an output that includes count numbers and growth over a specific period of time. Using counting machines is helpful in the lab environment where time is better spent in activities other than manually counting, and where accuracy is of extreme importance. The downsides of using counting machines include expense and potentially limited functionality of the device, beyond simple counting purposes.Learn more in Biology
According to Scientific American, peptidoglycan is the substance that makes up the cell walls of bacteria. The polymer is primarily composed of amino acids and sugars. Peptidoglycan is a crucial component of bacteria, and it influences several different facets of their biology. Scientists use differences in the peptidoglycan-based cell walls to classify different bacterial species.Full Answer >
The kingdom Monera included bacteria and cyanobacteria. Classification systems change when technologies such as DNA sequencing provide new information about the relationship between organisms. A three-domain system consisting of Bacteria, Archaea and Eukarya supplanted the five-kingdom system, and Monera is obsolete.Full Answer >
A microbicidal agent kills microorganisms such as bacteria, while a microbiostatic agent only prohibits the growth of such microorganisms. In the presence of microbiostatics, the microorganisms eventually die due to lack of reproduction. Microbicidals are irreversible and lethal, while microbiostatics are reversible.Full Answer >
Thermophilic bacteria are microorganisms found in areas that have temperatures too high for other types of bacteria. These bacteria live, reproduce and thrive in temperatures ranging from 113 degrees to more than 212 degrees Fahrenheit.Full Answer >