( ( In ( ( ( fractional crystallization ) and ) ( fractional freezing ) ) ) ( , ( ( chemical substances ) ( ( are ( fractionated ( based ( on ( difference ( in ( solubility ( at ( a ( given temperature ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NP (JJ fractional) (NN crystallization)) (CC and) (NP (JJ fractional) (NN freezing)))) (, ,) (NP (NN chemical) (NNS substances)) (VP (VBP are) (VP (VBN fractionated) (PP (VBN based) (PP (IN on) (NP (NP (NN difference)) (PP (IN in) (NP (NP (NN solubility)) (PP (IN at) (NP (DT a) (VBN given) (NN temperature)))))))))) (. .)))
In fractional crystallization and fractional freezing, chemical substances are fractionated based on difference in solubility at a given temperature.
(ROOT (S (NP (JJ Fractional) (NN crystallization)) (VP (VBZ is) (NP (NP (DT the) (NN separation)) (PP (IN of) (NP (NP (NNS compounds)) (PP (IN on) (NP (NP (DT the) (NN basis)) (PP (IN of) (NP (PRP$ their) (NNS solubilities))))))) (PP (IN in) (NP (DT a) (VBN given) (NN solvent))))) (. .)))