Which of the terms below does not describe a type of liquid crystal? a. eutectic b. nematic c. smectic d. cholesteric How would you separate Fe3+ from Ba2+ in a mixture? What makes the following two mixtures different? Discuss with an example: 1. Homogeneous mixture. \\ 2. Heterogeneo...
unwanted substances in the sample so that the desired compound is left. There are several methods of separation such as salting out, dialysis, centrifugation, chromatography, and electrophoresis, with the last two being the most useful as they can separate molecules with greater accuracy and ...
It is very stable. The particles of solute present in a solution do not separate out on keeping. A true solution does not scatter light (because its particles are very small). Concentration of a Solution The concentration of a solution is the amount of solute present in a givenquantityof ...
objects of higher mass) are pulled toward the bottom of the tubes. While centrifuges commonly separate solids from liquids, they may also fractionate liquids, as in blood samples, or separate
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: pressing and extraction. Pressing involves using physical force to extract the oil from the plant. Extraction involves dissolving the oil in a solvent to separate it from other plant material. The extraction process includes methods such as cold pressing, expeller pressing, and centrifugation....
Some small-scale manufacturers make baker's yeast extract by grinding the dry yeast using a mortar and mixing it with water overnight. This is followed by centrifugation, filtration,dialysis, and freeze-drying steps. These processes are required to get the purified yeast extract. ...
How does TRIzol® work? TRIzol® reagent is an acid-guanidinium-phenol based reagent ideally designed for the extraction of RNA (as well as DNA and protein) from various biological sample inputs. The low pH (acidic) of TRIzol® controls to separate RNA from DNA and protein, while a...
What is used to separate two or more liquids that are miscible with one another? Describe how you would determine the melting point of a salt of benzoic acid, with a melting point of 170^oC. What are the two main problems in using wet products in a sample when determining the melting ...
Colloidal particles eventually separate from the solvent. Suggest an explanation. Give an example of a substance that refracts light. How and why does this happen? Explain the effect on the concentration of a solution if it is "over-boiled." ...