The royal jelly had no effect on the leukemia cells, but it had dramatic effects on sarcoma cells. Royal jelly, however, has not lived up to expectations that it is an important anti-aging substance. But it is not without medical interest. Royal jelly consists of an emulsion of proteins, sugars, lipids and some other substances in a water base. Proteins make up about 13% of royal jelly. Most of the proteins comprise a family called major royal jelly proteins.
Cells were first discovered by Robert Hooke in 1663.
1833: English Botanist Robert Brown discovered the nucleus in plant cells. 1838: Matthias Jakob Schleiden, a German botanist, concluded that all plant tissues are composed of cells and that an embryonic plant arose from a single cell. He declared that the cell is the basic building block of all plant matter. This statement of Schleiden was the first generalizations concerning cells.