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UV absorbance at 280 nm is another ways of protein quantitation that does not rely on the production of a colored product for analysis. Explain this method of quantitation including what aromatic structures absorb at 280 nm. As well describe potential problems associated with the method
What is the basic structure of phosphatidyl cholines and how do they work as emulsifiers? Why is there so much research interest in phosphatidyl cholines and similar compounds in heart research?
Briefly explain how the calculated molar mass of HCL would be affected if the HCL-saturated cotton ball were placed in the tube the NH3-satureted cotton ball
At a certain concentration of reactants the rate of appearance of water in the following reaction is 0.43 M/s.
Compute the difference in the ionization energies for the 1H 2H atoms(The ionization energy is the energy of the transition from the n=1 to the n=infinity energy levels for the hydrogen atom. )?
Liquid nitrogen has a density of 0.808g/ml at 77 K. A sample of 2.5 L of liquid nitrogen is allowed to evaporate at 21°C and 1.00 atm of pressure. what volume will the nitrogen gas occupy?(keep your phases straight)
A three component solution is made by adding 0.300 moles of CH3CN and 0.400 moles of C3H6O to 0.350 moles of CS2. The mixture behaves as an ideal mixture. What is the vapor pressure of the solution?
The mass spectrum of an organic compound shows the relative abundances of M to be 62.87% and M 1 to be 4.760%. Assuming the peaks are caused by 12C and 13C isotopes,
Suggest two possible byproducts (excluding water) of the reaction between dibenzyl ketone and benzil in the presence of KOH.
Write the lewis structure for SeF6. What is the general "ABX" structure, shape name, and molecular polarity?
State the meaning of alpha and beta with regard to steroid structure, and indicate whether the hydroxyl group on ring A and the alkyl group on ring D are alpha or beta
It takes 45.0J to raise the temperature of an 9.80g piece of unknown metal from 13.0C to 24.0 C. What is the specific heat for the metal
Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
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