An improved form of apparatus for the fractionation is represented in fig.
Or the separation may be effected by a method of fractionation as described above.
The acids obtained from the thirdfractionation had a melting point of 53°-54° C.
The acid obtained from the first fractionation had the melting point at 75°-76°, indicating an acid either in carbon then stearic or palmitic acids.
Radioactive Isotopes Radioactive isotopes occur as minor constituents in many natural materials, from which they can be concentrated by fractionation procedures.
The methods necessary to make this distinction are based on the chemical fractionation of the tissue, isolation of RNA, determination of its amount by quantitative analysis, and determination of the amount of radioactivity by physical methods.
Liquid Scintillation Counting Liquid scintillation counting is the preferred method for the measurement of low-energy beta-emitting radioisotopes commonly used in cell-fractionation studies (see Figure 18).
It is best to prepare a set of the precipitates and to preserve them in well-stoppered vessels, and not to try to take the time and care necessary to effect a perfect fractionation as a lecture experiment.
Various methods of fractionation are similarly available, chiefly the precipitation of the intermediate 'dextrins' by alcohol.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "fractionation" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: breakdown; distillation; evaporation; fumigation; smoking; steaming; sublimation
