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When calculating DNA concentration, why must we multiply by a dilution factor?

When calculating DNA concentration, why must we multiply by a dilution factor?

Determining the concentration of DNA with a spectrometer:

When calculating the DNA concentration by multiplying by the adjusted OD260 readings....we must multiply by a dilution factor AND by 50

(the dilution factor is the inverse of the original di

Rimfrost   398   2 Replies

leelo

Whats a control!!??

Whats a control!!??

Okay so I need to put a control on my science fair board. My brother gave me an example of one. Like you have three plants. One gets sunlight, another gets a little bit, and the third one gets none. He said the control is the third one. But how would

dbb868   557   3 Replies

gafsroom

What's the dilution factor to get a 0.02mM solution from a 0.1mM solution?

What's the dilution factor to get a 0.02mM solution from a 0.1mM solution?

Using a 0.4mL aliquot of the 0.1mM solution, how much water is needed to dilute the solution to 0.02mM? Using what dilution factor?

zues1000   315   1 Reply

NURGirl

What's the difference between an experiment vs observational study?

What's the difference between an experiment vs observational study?

What's the difference between an experiment vs observational study?

RIVAS3   568   4 Replies

Nursing2010

What would the ctrl group be in an experiment where u put different amount of Mentos into each bottle of coke?

What would the ctrl group be in an experiment where u put different amount of Mentos into each bottle of coke?

I have to do a science experiment in Science where we have to change one of the variables to be tested. I chose to put different amounts of Mentos into each bottle to see if it would effect the height of the fountain made by the Mentos and Diet Coke.

bugaboo810   423   1 Reply

bio_man

What would happen to an ecosystem if the decomposers disappeared?

What would happen to an ecosystem if the decomposers disappeared?

What would happen to an ecosystem if the decomposers disappeared?

mizberries   27982   5 Replies

Eloo

What would happen if we didn't have amylase in our saliva?

What would happen if we didn't have amylase in our saliva?

If we didn't have Amylase in our Saliva what would happen to the process of digestion? Would it still go on normally?

zzwChris   7791   2 Replies

nut

What would happen if the ratio of reactants in a chemical reaction is changed?

What would happen if the ratio of reactants in a chemical reaction is changed?

If I added 10 mL of substance A with 10 mL of substance B, I get 20 mL of substance C. What would happen if I added 20 mL of substance A instead? Any help would be appreciated.

Leen   311   2 Replies

rimazx

what would be the better results if we use more magnesium during the MgO lab?

what would be the better results if we use more magnesium during the MgO lab?

this is about the magnesium oxide lab.

please, i need your help..thanks a lot!:]

OBISSUCK   531   1 Reply

David93

What would be the absorbance of a sample with 20% transmittance?

What would be the absorbance of a sample with 20% transmittance?

Please help me find the absorbance of a sample with 20% transmittance...

flow.velez   1521   1 Reply

Smntnl

What would be a lab that tests for respiration in a small animal?

What would be a lab that tests for respiration in a small animal?

How would you prepare a lab where you test for respiration in small animals? How would you draw the experiment/system?

NursingMajor   274   1 Reply

bugbeany

what would be a good science experiment for a 4th grader to do using the scientific method?

what would be a good science experiment for a 4th grader to do using the scientific method?

My daughter has to do a science experiment using the scientific experiment. I don't want to pick any baby things and the only thing I can think of is Egg in a Milk bottle. Volcanoes are not allowed. Any suggestions please

rivera5454   437   1 Reply

smp1016

What will be the molarity of this dilution?

What will be the molarity of this dilution?

For my dilution, I will pipet 25.00 mL from the original 0.5000M solution and place into a 100 mL volumetric flask and fill to the mark with distilled water. What will be the molarity of this dilution after the water is added to the 100 mL mark and m

michiggy   1257   1 Reply

rizkallah15

What was the reason for rinsing out the buret with NaOH solution before starting the titrations?

What was the reason for rinsing out the buret with NaOH solution before starting the titrations?

I am doing a grade 12 chemistry lab, in which we are given the Molarity of NaOH, but not that of HCl, and acetic acid. We need to figure out both through titration experiments.

smiley14   7167   1 Reply

smilez23

What was the purpose of the balloon on the glucose-yeast extract broth bottle

What was the purpose of the balloon on the glucose-yeast extract broth bottle

Can you answer this for me, I’m confused

Marianny   263   1 Reply

bolbol

What was the original concentration of the HCl stock solution?

What was the original concentration of the HCl stock solution?

If the result of the dilution is 40 mL of 0.40 M HCl and it was diluted 10-fold.

ff.marquis   608   1 Reply

nurazije

What volume of a bacterial culture would you have to add to 60mL of diluent to make a 1/15 dilution?

What volume of a bacterial culture would you have to add to 60mL of diluent to make a 1/15 dilution?

What volume of a bacterial culture would you have to add to 60mL of diluent to make a 1/15 dilution?

Please show how you got it to because I can't figure it out. The answer is supposed to be 4.3mL

michi   316   1 Reply

michn

What types of things can I look at using Transmission electron microscopy and scanning electron microscope?

What types of things can I look at using Transmission electron microscopy and scanning electron microscope?

Okay, I know that TEM are used for thin sections of cells or tissues and SEM are used for viewing three dimensional objects. I also know that TEM are used to look at Golgi bodies and SEM are used to look at pollen grains. Are there any other objects

feven   493   2 Replies

nurhan

What type of science experiment for an 8 year old?

What type of science experiment for an 8 year old?

My child must prepare a science experiment. This has to be ready in less than 3 weeks. I'm no scientist myself. Any suggestions for experiments that aren't too complicated? Thank you in advance.

Smorr   274   1 Reply

rivatayah

what type of doctor can you be if you are already a clinical Laboratory scientist?

what type of doctor can you be if you are already a clinical Laboratory scientist?

okay so if you are a clinical Laboratory scientist right now and you want to go back to school to become a doctor what type of doctor can you be.

michaelpipe18   380   2 Replies

michal.levy

What test would Helicobacter pylori be positive for?

What test would Helicobacter pylori be positive for?

What test would Propionibacterium acnes be positive for: Starch, casein, triglycerides, tryptophan, and urea?

What test would Helicobacter pylori be positive for?

Microgirl16   421   1 Reply

rkdgh2002

What temperature kills a lettuce seed ?

What temperature kills a lettuce seed ?

Im doing a science project on " how does temperature affect the germination of lettuce seeds ? " and im planning to microwave the seeds / put it out in the sun and put it in the freezer / cooler , but i need to know how hot and cold the lettuce seed

Leeta c   1483   2 Replies

Alexx

What si teh proper method for making dilutions?

What si teh proper method for making dilutions?

If a 1:1 dilution is an mix of equal parts, what is a 1:2 dilution? I always thought you subtracted the volume of the concentrated part from the final total volume. For instance, to make a 1:20 dilution, take one part of the concentrate and add 19 pa

smmunday   298   1 Reply

rj.lall

What should I research for my science experiment?

What should I research for my science experiment?

My science teacher wants 3 pages of research, but I don't know what to research. My experiment is going to be on how long drinks keep cold. I already know I have to research density, but what else?

freddy0622   407   1 Reply

denver413

What science experiment can be done with a vehicle?

What science experiment can be done with a vehicle?

I have to do some kind of science experiment and have a Toyota 4Runner. Does anyone have any suggestions for an advanced level high school science experiment?

nursing101   321   3 Replies

nursing2012

What s necessary to measure with a high degree of accuracy while preparing the KHP analyte solution? ?

What s necessary to measure with a high degree of accuracy while preparing the KHP analyte solution? ?

You can pick one or more from the following:

1. The volume of the erlenmeyer flask to be used as the container

2. The mass of KHP solute

3. The volume of water solvent

4. The volume of the KHP-water solution

micabar   499   1 Reply

bunnie49024

What qualification before taking the State of California Clinical Laboratory Scientist license?

What qualification before taking the State of California Clinical Laboratory Scientist license?

What degree needed to taking the State of California Clinical Laboratory Scientist license?
How to prepare the exam for the State of California Clinical Laboratory Scientist license?

ritznca   326   1 Reply

nursenurse

What percent by volume of H2O2 does the usual over the counter Hydrogen Peroxide disenfectant have?

What percent by volume of H2O2 does the usual over the counter Hydrogen Peroxide disenfectant have?

I am trying to do a lab and want to be specific.  If you know molarity, that would be great. Thanks!

zuggler   393   3 Replies

ff9176

What other test/s should be performed in order to confirm the presumptive "S.aureus colonis" from ...

What other test/s should be performed in order to confirm the presumptive "S.aureus colonis" from ...

Guide questions:


1.What other test/s should be performed in order to confirm the presumptive "S.aureus colonis" from the Mannitol Salt Agar [MSA] plate?

2.When is a differential medium also a selective medium and vice versa?

3.How can organisms t

askollmeyer   459   1 Reply

Asmaa

What other oil can we use in place of immersion oil in light microscopy?

What other oil can we use in place of immersion oil in light microscopy?

And also can you please tell me what would happen if I use the oil with an ordinary dry objective lens instead of an immersion lens?

irina   1324   2 Replies

irina

What methods in laboratory do they use to identify which antibiotic may be of value in treating a particular?

What methods in laboratory do they use to identify which antibiotic may be of value in treating a particular?

What methods in laboratories do they use to identify which antibiotic may be of value in treating a particular organism?

nursenor   335   2 Replies

rivatayah

What method can I use to find out how many monosaccharides are in a mixture which is lactose and ...

What method can I use to find out how many monosaccharides are in a mixture which is lactose and ...

I have to design an experiment at school. I will test if different temperatures and pH levels have an effect on the enzyme activity. I have tried the fehling's solution, but I am not sure if there will be a specific colour change, if there are l

juliahin99   776   1 Reply

bio_man

What makes a study an experiment as opposed to an observational study?

What makes a study an experiment as opposed to an observational study?

What makes a study an experiment as opposed to an observational study?

Thoughts?

onemustfall!   574   2 Replies

juldina1

What lab would demonstrate the law of conservation of matter?

What lab would demonstrate the law of conservation of matter?

I need a little help with this and i don't know what lab would demonstrate that. I need a procedure to, but Im sure I can come up with that. I just need some examples of labs. Thanks!!! Much Appreciated!

nursingishard   337   1 Reply

nursing59

What kind of cell is an Elodea Leaf?

What kind of cell is an Elodea Leaf?

I Have a science project, so what kind of cell is an Elodea Leaf?

micike   330   1 Reply

NursingChick

What is your titrant? Show (or describe) how you determined the number of moles of your titrant

What is your titrant? Show (or describe) how you determined the number of moles of your titrant

What is your titrant? Show (or describe) how you determ

Sadah_17   375   1 Reply

bio_man

What is water potential of potato cell?

What is water potential of potato cell?

I'm doing a potato lab in my AP Bio class and am confused on how to calculate the water potential of the potato cell.
The equation to calculate for water potential is Ψ = 0 + Ψs. Ψs is the solute potential and the equa

LexRunner408   11450   8 Replies

vanbu

What is used as a support for crucibles and funnels?

What is used as a support for crucibles and funnels?

what is used as a support for crucibles and funnels?

what is used to measure mass?

what is used to heat or hold a solution?

what is used for titration labs?

rillameister   435   1 Reply

FF.SMITH

What is the value of a hanging-drop preparation?

What is the value of a hanging-drop preparation?

What is the value of a hanging-drop preparation

pwaterhouse   2989   1 Reply

padre

What is the significance of chemistry, microscopy and physics to biology?

What is the significance of chemistry, microscopy and physics to biology?

how does a knowledge on this disciplines help us provide a better understanding on biology?

JUAN99   390   1 Reply

Nurs-4