T and B cells. Lymphocytes originate from stem cells in the bone marrow; these stem cells divide continuously, releasing immature lymphocytes into the bloodstream. Some of these cells travel to the thymus, where they multiply and differentiate into T lymphocytes, or T cells.
Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air, oils, greases, bacteria and water makes it useful for food packaging. Cellophane is in many countries a registered trade mark of Innovia Films Ltd based in Wigton, Cumbria, United Kingdom.
Hexane (also known as n-Hexane) is a highly volatile aliphatac hydrocarbon. It is a commercial and industrial product that contains a mixture of hydrocarbons with six carbon atoms (hence the prefix hex) (#ATSDR - Toxicological Profile. It is a colorless liquid at room temperature with a slight gasoline smell (#OSHA).