当反应温度高于聚合上限温度时,聚合物会解聚成小分子单体.A chain - growth polymer raised above the ceiling temperature will degrade, or depolymerize.以肝素钠为原料,经成盐 、 酯化 、 解聚和纯化得到依诺肝素钠.Enoxaparin sodium was prepared from heparin sodium via salinization,...
为什么不选玉石的领带扣针 呢 ?Why not get jade tiepins for them?类别26:花边及刺绣 、 饰带及编带; 钮扣 、 领.扣 、 扣针及.针; 假花.Class 26 : Lace and embroidery, ribbons and braid; buttons, hooks and eyes, pins and needles; artificial flowers.1999年间,142名苏格兰人因...