| 单词 | isoelectric point |
| 释义 | > as lemmasisoelectric point a. (Composed of particles) having no net electric charge; equal as regards electric charge; chiefly in isoelectric point, the point (usually pH value) at which an amphoteric molecule or a colloidal particle is electrically neutral in a solution. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electric charge, electricity > [adjective] > not charged non-electrized1746 non-electrified1747 unelectrified1747 neutral1760 unelectrized1764 uncharged1815 indifferent1855 isoelectric1900 electroneutral1924 the world > matter > physics > electromagnetic radiation > electricity > electric charge, electricity > [noun] > process of charging > absence of charge isoelectric point1900 electroneutrality1917 1900 W. B. Hardy in Proc. Royal Soc. 66 112 It is clear that there exists some point at which the particles and the fluid in which they are immersed are iso-electric. This iso-electric point is found to be one of great importance. As it is neared, the stability of the hydrosol diminishes until, at the iso-electric point, it vanishes, and coagulation or precipitation occurs. 1922 J. Loeb Proteins & Theory Colloidal Behavior i. 6 The conception of the ‘isoelectric point’ of proteins was introduced before its chemical meaning was recognized and it attracted attention because it was connected with the precipitation of colloids. 1922 J. Loeb Proteins & Theory Colloidal Behavior iv. 42 When an acid, e.g., HCl, is added to isoelectric gelatin (or any other isoelectric protein), an equilibrium is established between free HCl, protein chloride, and non-ionogenic (or isoelectric) protein. 1946 P. H. Mitchell Textbk. Biochem. iv. 107 Crystallization of a protein is usually carried out at its isoelectric point. 1958 J. Packer & J. Vaughan Mod. Approach Org. Chem. xiii. 433 In a solution at the isoelectric point, amino acid molecules will not migrate in the electric field created by the introduction of a cathode and an anode. 1966 Acta Chem. Scand. XX. 821 The peptides isoelectric between pH 5·0 and 6·5 proved to possess poor carrier ampholyte properties. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。