A critical assessment of the current state of. knowledge on a topic â with a view to. researching one of the âgapsâ in that body of. knowledge. As a critical assessment, an effective review. analyses and synthesises the published work on a. topic.
Because of the strong hydrogen bonds that occur between cellulose chains, cellulose does not melt or dissolve in common solvents. Thus, it is difficult to convert the short fibers from wood pulp into the continuous filaments needed for artificial silk, an early goal of cellulose chemistry. he existence of cellulose as the common material of plant cell walls was first recognized by Anselm Payen in 1838. It occurs in almost pure form in cotton fiber and in combination with other materials, such as lignin and hemicelluloses, in wood, plant leaves and stalks, etc.
alcium makes your bones strong because it has vitamin D which is a protein and that protein is a very hard substance. So when you calcium it starts to layer kind of like a wal â¦ l around your bones making them stronger.the trick is two sets of cells-one is always desolving your bones, and the second builds up every micro break). For weight bone is one of the strongest materials on earth, super light, flexible and strong, they are chambers of hollow walls allowing them to bend.