You are given a protein solution with a concentration of 0.15 mg/ml. Suppose that we want to prepare 1 ml of 10 μg/ml solution. How much of H2O and protein stock do we need to add to obtain the target concentration and volume?

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Q: X OH OH

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Q: Which of the following compounds is insoluble in water at 25 °C ?

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Q: e 0= -8°

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Q: HgSO4 H₂SO4 H₂O HBr (excess)

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.