Non-seed

This non-template and non-seed method has its unique advantage that control the particle's shape and size by changing the reductant concentration. The role played by the capping agent is to assist the growth of good crystalline of nanoparticles.

它最鲜明的特点在于不需要任何模板和种子诱导，仅通过控制还原剂的浓度就可以实现对纳米粒子的尺寸和形状控制，而包裹剂的主要作用是防止粒子聚集和得到更好晶型结构。

Although the main characteristic of this family was established before the origin of seed plants, they also showed some differences between the members of non-seed and seed plants.

尽管在种子植物出现之前该基因家族的基本特征便已经形成，但本研究依然发现该基因家族在种子植物和非种子植物中存在一定的差异。

To ensure food security, the country will strengthen the protection and utilization of germplasm resources and the construction of seed banks, according to the annual Central Economic Work Conference, which concluded on Dec 18. The country will also continue to prevent the use of arable land for non-farming purposes, it said.

会议强调，要加强种质资源保护和利用，加强种子库建设，坚决遏制耕地“非农化”、防止“非粮化”，更好保障国家粮食安全。