Certain people are also more prone to anemia due to the following conditions: 1  Insufficient iron in the diets. 2  Children who experience sudden growth spurts. 3  Women who have been pregnant for four months or more. 4  Women who have given birth recently. 5  People who suffer from chronic kidney disease.
Seed crystal. A seed crystal is a small piece of single crystal / polycrystal material from which a large crystal of the same material typically is to be grown.
Crystallization is the formation of a solid ordered substance, such as happens when water freezes. In nature, crystals are mostly formed from ions which are dissolved in water, as for example in the formation of shells or bone. This involves the clustering of ions into increasingly large nuclei, until a crystal is formed when a certain size is reached. However, the details of this growth process have been the subject of discussion for many years.