In an experiment to isolate the lipids from horse red blood cells, one of the steps is too "Add 500µL of 10mM sodium phosphate buffer (pH. 7.0). Resuspend the pellet thoroughly by vortexing."
What happens in this step of the lipid isolation period? (hint: the supernatant in the next centrifuge step will be red)
In: Biology
The decomposition of H2CO3(aq) gives off CO2(g) and also produces H2O(l). In a particular experiment at 30.0ºC, 184.3 mL of gas product at 1.078 atm were collected over water. What mass in mg of H2CO3 reacted? Enter your answer to 2 decimal places
In: Chemistry
Require some hint to approach the problem
How can we identifying whether or not the given measurements of maxima and minima belonged to a single slit or double slit experiment ?
How a magnet behaved in earths magnetic field ?
What formula should be used to dentify the charge of a mystery material?(electrostatics)
In: Physics
A 7.364 gram sample of an organic compound
containing only C, H, and O is analyzed by combustion analysis and
9.343 g CO2 and 2.550
g H2O are produced.
In a separate experiment, the molar mass is found to be
104.1 g/mol. Determine the empirical formula and
the molecular formula of the organic compound.
In: Chemistry
A scientist is worried that the mitochondria he is studying are uncoupled. They estimate high rates of the electron transport chain activity by measuring NADH oxidation, high rates of oxygen uptake using a Clark electrode, but very low ATP synthesis in an assay. Explain what is happening in the experiment and assess their analysis - are they right?
In: Biology
Suppose you are provided with an isolated nerve-muscle preparation in order to study synaptic transmission. In one of your experiments, you give that preparation a drug that blocks voltage-gated Ca++ channels: in another , you give tetanus toxin to the preparation. How will synaptic transmission be affected in each experiment?
In: Nursing
Consider a Michelson–Morley experiment with 11-m light paths perpendicular and parallel to the ether wind. What would be the difference in light travel times on the two paths if Earth moved relative to the ether at
(a) its orbital speed (Appendix E);
(b) 0.01c;
(c) 0.5c; and
(d) 0.99c?
In: Physics
You have isolated two novel compounds, Compound X and Compound Y, which you suspect might be carcinogenic in some way. Based on their chemical characteristics, you hypothesize that Compound X is a cancer initiator and Compound Y is a cancer promoter. Design an experiment to test your hypothesis.
In: Biology
I am currently doing an experiment on continous wave NMR and was wondering if someon could explain the theroy behind how resonace is created in a sample, for example hydrogen 1.
If possible type would be best as I have trouble reading, on my laptop the hand written answers somtimes.
In: Physics
What is the law of reflection?What is the critical angle?What is reflectivity?What is resolving power?What is one use of polarization?What was the significance of Young’s double slit experiment?What is a lens?Describe to types of lenses?What is the relationship between particle size and diffraction angle?What is anisotropy?
In: Physics