Ha has functional groups such as hydroxyl, carboxyl and N-acetyl, therefore, it can be modified by cross-linking, esterification, graft, molecule modification and composition.

HA具有羟基、羧基和乙酰胺基等官能团，可通过交联、酯化、接枝、分子修饰和复合等方法进行改性。

youdao

The paper introduces the design and application of perforated weir-riser distributor with toothed weir, which is used in the modification of n-paraffin separation unit.

详细介绍了带齿形堰的筛孔溢流盘式分布器在正构烷烃分离装置改造中的设计与应用情况。

youdao

In spite of the scientific consensus that the new techniques of genetic engineering are essentially extensions, or refinements, of conventional (but less precise and less predictable) techniques of genetic modification, both U.N. entities have established requirements for the products of genetic engineering (whether plants or food derived from them) that no conventionally modified product could meet.

FORBES: Commentary