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The changes of intrinsic viscosity and end carboxyl group content with temperature and time were studied for poly(trimethylene terephthalate)(PTT), PET and CDP.

研究了聚对苯丙醇酯(PTT),PET,CDP在不同度和时间下的特和端羧基含量的变化。

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原声例句
Osmosis-泌尿

This happens because albumin has acidic amino acids, like glutamate and aspartate, which have some carboxyl groups that are in the form of COO- or COOH.

这是因为白蛋白含有性氨基，比如谷氨与天冬氨，具有一COO-COOH形式存在的羧基。

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Osmosis-泌尿

When there's a high pH, or alkalosis, there are very few protons floating around, and so those carboxyl groups tend to be in the COO- form.

当血液pH值高碱中毒时，几乎没有氢离子在周围漂浮，所那羧基倾向于呈COO-的形式。

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