To calculate the number of viable cells in the original sample, the number of colonies present after the plates have been incubated is multiplied by the dilution factor. The number of cells in a sample is usually expressed as colony forming units (CFU) per unit of volume (in this case mL...
During the stationary phase, cells switch to a survival mode of metabolism. As growth slows, so too does the synthesis of peptidoglycans, proteins, and nucleic-acids; thus, stationary cultures are less susceptible to antibiotics that disrupt these processes. In bacteria capable of producing endospor...
Which one gives the most accurate number to calculate the original bacterial count in the sample, the 24, 48, or 72 hours of incubation sample? You take 0.05 mL of a culture of bacteria at a concentration of 4 x 107 CFU/mL and add 4.95 mL of water to it. What ...
It can calculate metabolic fluxes in a steady state, allowing to predict the growth rate of an organism or the production rate of a metabolite. Genotoxin chemical agent that can damage DNA, causing mutations and possibly cancer. Gnotobiotic model all microorganisms present in and on the animal ...
Bacterial vaginosis (BV) has been reported in one-third of women worldwide at different life stages, due to the complex balance in the ecology of the vaginal microbiota. It is a common cause of abnormal vaginal discharge and is associated with other health issues. Since the first description ...
However, under direct selling, the profits of the manufacturer show an “inverted U” trend with the increase in the market share of green consumers. In addition, under certain conditions, the direct selling channels opened by the manufacturer are not necessarily to sell green products, but to ...
(TCBS) agar. Incubation at both 20–25 and 35 °C for 2 days was performed andVibriocolonies were counted according to the colony-forming unit (CFU) method. The incubation temperature of 35 °C was chosen to assess vibrios potentially pathogenic to humans. The incubation temperature of 20–...
The scientists chose 11 sites (including the final landing site for the Mars 2020 mission, Jezero Crater, and control sites of lowest and highest H2 production) to calculate H2 production based on their radionuclide composition data obtained from the γ ray spectrophotometer (GRS) on Mars Odyssey...