Photoorganoheterotroph = use light, organic e- donor, carbon source. Chemolithoautotroph = use organic/inorganic mlcls for energy, inorganic e- donor, CO2 carbon source. Chemolithoheterotroph = use organic/inorganic mlcls for energy, inorganic e- donor, organic carbon source. Chemoorganoheterotoph = organic/inorganic energy source, organic e- donor, carbon source.
When plastic polymer technology was not much in use Waxed Paper or card board paper was used to wrap soaps, cookies and a host of other fragile items. Wax makes the paper stiff, water resistant and moisture proof. Wax is environmentally benign and non toxic to humans. Even now as a green measure we see fruit juice packs on such cardboard papers.
It is commonly made in the laboratory by reacting a lead(II) salt (such as lead(II) nitrate) with a chromate or dichromate salt (such as potassium chromate or potassium dichromate) in solution in water, producing a very deep yellow to orange precipitate of lead(II) chromate.ead(II) chromate is used in some pyrotechnic compositions, especially delay compositions, as an oxidizer. Up to the late 1800s it was used to impart a bright yellow color to some types of candy. It has also been used in the paint to color school buses.(Chrome Yellow). Previously, its use was wider.