Add 2 mL of culture to 20 mL of buffer. 2/20 = 1/10
To make a 1 to 100 dilution from a 1 to 10 dilution, first take 1 part of the 1 to 10 dilution and add it to 9 parts of diluent (such as water or buffer). This results in a 1 to 100 dilution because the original 1 to 10 dilution is already diluted, and further diluting it by 10 times achieves the desired concentration. Ensure thorough mixing to achieve uniformity.
1 part of solution A plus 99 parts solution B
A 2 to 1 dilution means that for every 2 parts of a concentrated solution or substance, there is 1 part of a diluent (such as water). This results in a total of 3 parts, with the final mixture having a concentration that is one-third of the original. For example, if you have 2 mL of a solution and add 1 mL of water, you create a 2 to 1 dilution.
To make a 1 to 100 dilution, start by taking 1 part of the concentrated solution and add it to 99 parts of a diluent (usually water or a buffer). For example, if you use 1 mL of the concentrated solution, mix it with 99 mL of the diluent. Ensure thorough mixing to achieve a uniform dilution. This results in a final solution that is 1% of the original concentration.
Add 2 mL of culture to 20 mL of buffer. 2/20 = 1/10
To prepare a final dilution of 10^-10, you can start with a stock solution at a known concentration. First, create a 10^-1 dilution by mixing 1 part stock solution with 9 parts diluent (e.g., sterile water). Then, take 1 part of this 10^-1 dilution and mix it with 9 parts diluent to create a 10^-2 dilution. Repeat this step until you reach the desired 10^-10 dilution, performing a series of ten 1:10 dilutions.
In chemistry and biology, the dilution factor is the total number of unit volumes in which the material is dissolved. As I understand it, the dilution refers to the dilution ratio. If you add 1 part of something to 4 parts of something else, the dilution ratio is 1 to 4. The dilution factor counts all the parts and expresses the same thing as 1 out of 5.
33,4ml
To make a 1 to 5 dilution you mix 1 part of your substance with 4 parts water. ie: Mix 1 tablespoon of creamer with 4 tables spoons of coffee, and the coffee is 1/5 creamer now.
To make a 1 to 100 dilution from a 1 to 10 dilution, first take 1 part of the 1 to 10 dilution and add it to 9 parts of diluent (such as water or buffer). This results in a 1 to 100 dilution because the original 1 to 10 dilution is already diluted, and further diluting it by 10 times achieves the desired concentration. Ensure thorough mixing to achieve uniformity.
1 part of solution A plus 99 parts solution B
If accuracy is not a problem the most simple way to produce 20 ml of a 1:400 dilution is to take 1:400 of 20 ml (i.e. 0.05 ml) of the original solution and add 19.95 ml of liquid. As pipettes are the most precise close to their maximum uptake volume and micro-pipettes are inherently much less precise than pipettes for larger volumes I'd do a two-step dilution. 1. step: 1.000 ml of original solution with 1 ml pipette + 4 times 4.750 ml with 5 ml pipette 2. step: 1.000 ml of solution from step 1 + 4 times 4.750 ml with 5 ml pipette.
To calculate a 1:2000 dilution, you mix 1 part of the substance with 1999 parts of the diluent (such as water or buffer). For example, if you want to prepare 2000 mL of the diluted solution, you would use 1 mL of the concentrated substance and add 1999 mL of the diluent. The total volume after mixing should equal 2000 mL, maintaining the 1:2000 ratio.
0.03125 ounces.
1:4
You dilute it 1:10, then you take 1 part of that solution and mix it with 9 parts of the diluent. That will make the 1:100 dilution you need, incl. prevention of pipette inaccuracy.