polydisperseadj.

Brit.

/ˌpɒlɪdᵻˈspəːs/, U.S.

/ˈˌpɑlidəˈspərs/

Origin: A borrowing from German. Etymon: German polydispers.

Etymology: < German polydispers ( W. O. Ostwald Grundriss der Kolloidchem. (ed. 2, 1911) i. 39) < poly- poly- comb. form + dispers (1909 or earlier; < classical Latin dispersus : see disperse adj.). Compare disperse v. Compounds, monodisperse adj.

Physical Chemistry.

Existing in the form of or containing colloidal particles having a range of sizes; esp. designating macromolecular substances in which there is a simple distribution of particle size with one peak; relating to such a distribution. Cf. polymolecular adj. 4.

ΘΚΠ

the world > matter > chemistry > physical chemistry > colloid > [adjective] > properties > polydispersity

polydisperse1915

polydispersed1941

1915 M. H. Fischer tr. W. Ostwald Handbk. Colloid-chem. i. 35 These systems in which the disperse phase is composed of particles having different degrees of dispersion may be called polydisperse systems.

1938 Nature 4 June 1001/2 The specific polysaccharide of type I pneumococcus is polydisperse with an average weight of approximately 225,000.

1968 H. Harris Nucleus & Cytoplasm iii. 56 Preparations of the total RNA in the cell cytoplasm..did not show any fraction which had..the polydisperse sedimentation of the rapidly labelled nuclear RNA.

1991 Progress Polymer Sci. 16 32 The samples investigated were very polydisperse; the ratio M_w/M_n ranged between 3 and 6.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polydisperse
释义	polydisperseadj. Brit. /ˌpɒlɪdᵻˈspəːs/, U.S. /ˈˌpɑlidəˈspərs/ Origin: A borrowing from German. Etymon: German polydispers. Etymology: < German polydispers ( W. O. Ostwald Grundriss der Kolloidchem. (ed. 2, 1911) i. 39) < poly- poly- comb. form + dispers (1909 or earlier; < classical Latin dispersus : see disperse adj.). Compare disperse v. Compounds, monodisperse adj. Physical Chemistry. Existing in the form of or containing colloidal particles having a range of sizes; esp. designating macromolecular substances in which there is a simple distribution of particle size with one peak; relating to such a distribution. Cf. polymolecular adj. 4. ΘΚΠ the world > matter > chemistry > physical chemistry > colloid > [adjective] > properties > polydispersity polydisperse1915 polydispersed1941 1915 M. H. Fischer tr. W. Ostwald Handbk. Colloid-chem. i. 35 These systems in which the disperse phase is composed of particles having different degrees of dispersion may be called polydisperse systems. 1938 Nature 4 June 1001/2 The specific polysaccharide of type I pneumococcus is polydisperse with an average weight of approximately 225,000. 1968 H. Harris Nucleus & Cytoplasm iii. 56 Preparations of the total RNA in the cell cytoplasm..did not show any fraction which had..the polydisperse sedimentation of the rapidly labelled nuclear RNA. 1991 Progress Polymer Sci. 16 32 The samples investigated were very polydisperse; the ratio M_w/M_n ranged between 3 and 6. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.1915
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