虽然导致老年痴呆症的原因还没有发现，但是有人假设其原因是淀粉样前提蛋白的调节异常和β-淀粉样蛋白的消失（β-淀粉样蛋白连锁反应）。
The causes for Alzheimer's disease are not known, but dysregulation of amyloid-precursor protein expression and beta-amyloid clearance is hypothesized (beta-amyloid cascade).
采用共凝法制备的复合材料淀粉粒子的结晶结构消失，淀粉粒子的结构为无定形结构。
The crystal structure of starch particles in the composite prepared with co-coagulation method disappeared and transferred to amorphous state.
单核晚期小孢子经培养后，具胚状体发生能力的细胞中央液泡消失，积累淀粉，含丰富细胞器。
The central vacuole began to disappear, and cytoplasm with abundant organelle accumulated starch in some of microspores having embryogenic ability on transfer to culture.
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