Mole (unit)
The mole is the unit of measurement in the International System of Units (SI) for amount of substance. It is defined as the amount of a chemical substance that contains as many elementary entities, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with relative atomic mass 12 by definition. This number is expressed by the Avogadro constant, which has a value of 7023602214129000000♠6.02214129(27)×1023 mol-1. The mole is one of the base units of the SI, and has the unit symbol mol.
The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions. For example, the chemical equation 2 H2 + O2 → 2 H2O implies that 2 mol of dihydrogen (H2) and 1 mol of dioxygen (O2) react to form 2 mol of water (H2O). The mole may also be used to express the number of atoms, ions, or other elementary entities in a given sample of any substance. The concentration of a solution is commonly expressed by its molarity, defined as the number of moles of the dissolved substance per litre of solution.
Melanocytic nevus
A melanocytic nevus (also known as "nevocytic nevus") is a type of lesion that contains nevus cells (a type of melanocyte). Some sources equate the term mole with "melanocytic nevus". Other sources reserve the term "mole" for other purposes.
The majority of moles appear during the first two decades of a person's life, with about one in every 100 babies being born with moles. Acquired moles are a form of benign neoplasm, while congenital moles, or congenital nevi, are considered a minor malformation or hamartoma and may be at a higher risk for melanoma. A mole can be either subdermal (under the skin) or a pigmented growth on the skin, formed mostly of a type of cell known as a melanocyte. The high concentration of the body's pigmenting agent, melanin, is responsible for their dark color. Moles are a member of the family of skin lesions known as nevi.
Classification
Some sources equate the term mole with "melanocytic nevus". Other sources reserve the term "mole" for other purposes such as the animal of the same name. Melanocytic nevi represent a family of lesions. The most common variants are:
Rock
Rock commonly refers to:
Rock or Rocks may also refer to:
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List of Superman enemies
This is a list of fictional characters from DC Comics who are or have been enemies of Superman. It is notable that several of Superman's enemies are or have been foes of the Justice League of America as well.
Central rogues gallery
In alphabetical order (with issue and date of first appearance):
Foes of lesser renown
In alphabetical order (with issue and date of first appearance):
Group villains
Allies in conflict
Some characters originally conceived as heroes have come into conflict with Superman.
Enemies created for other media
These are Superman villains created in other media, with no appearances in previous comics. Livewire, Mercy Graves, Non and Ursa subsequently made appearances in Superman comic books, and have been integrated into the mainstream continuity of the DC Universe.
Villains from comics in other media
A number of villains from the comic books have made an appearance, or appearances, in Superman related live-action media.
Rock (rapper)
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Jamal Bush (born November 4, 1975), better known by his stage name Rock (or Big Rock, or alternatively The Rockness Monstah), is an American rapper, famous as a member of hip hop collective Boot Camp Clik and the duo Heltah Skeltah along with Sean Price. He is known for his deep, grimy voice and having a sophisticated and rugged flow.
After releasing two albums with Heltah Skeltah, Nocturnal and Magnum Force, Rock left Duck Down Records and pursued a solo career. He signed to DJ Lethal's Lethal Records and recorded a solo album titled Planet Rock, which was never released after the label folded. He didn't make an appearance on the Clik's 2002 group album The Chosen Few, being the only member of the "Great 8" not to appear.
He made his official return to Duck Down in 2005, making appearances on Sean Price's Monkey Barz album and Smif-N-Wessun's Smif 'N' Wessun: Reloaded album. He's performed songs for a variety of video games including "I Am Rock" for Need for Speed: Most Wanted, "This Is Me" for Blitz The League II and "I Am Rock" for NFL Street 2. He and the Boot Camp released their third group album, The Last Stand, on July 18, 2006.
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