Chemical substance

A chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be chemical elements, chemical compounds, ions or alloys.

Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.

Chemical substances exist as solids, liquids, gases or plasma, and may change between these phases of matter with changes in temperature or pressure. Chemical reactions convert one chemical substance into another.

Drug

A drug is any substance other than food, that when inhaled, injected, smoked, consumed, absorbed via a patch on the skin or dissolved under the tongue causes a physiological change in the body.

In pharmacology, a pharmaceutical drug or medicine, is a chemical substance used to treat, cure, prevent, diagnose a disease or promote well-being. Traditionally drugs were obtained through extraction from medicinal plants, but more recently also by organic synthesis. Pharmaceutical drugs may be used for a limited duration, or on a regular basis for chronic disorders.

Pharmaceutical drugs are often classified into drug classes—groups of related drugs that have similar chemical structures, the same mechanism of action (binding to the same biological target), a related mode of action, and that are used to treat the same disease. The Anatomical Therapeutic Chemical Classification System (ATC), the most widely used drug classification system, assigns drugs a unique ATC code, which is an alphanumeric code that assigns it to specific drug classes within the ATC system. Another major classification system is the Biopharmaceutics Classification System. This classifies drugs according to their solubility and permeability or absorption properties.

Chemical (Crashdïet song)

Chemical is the second single from the Swedish glam metal band Crashdïet's 2010 album Generation Wild. It was released on 19 September and was written by Crashdïet's guitarist Martin Sweet and the band Peep Show's singer Johnny Gunn.

Personnel

External links

References

Zip

Zip, Zips or ZIP may refer to:

Computing

Arts and entertainment

List of recurring Tomb Raider characters

This is a list of recurring characters that appear through the game series, Tomb Raider.

Winston Smith

Lara's butler who is often seen at Croft Manor. He rarely plays any role in the game's plot, usually only seen in Lara's Mansion, in the 2nd and 3rd games he follows Lara around the mansion, carrying a tray with what seems to be blue mugs on it and often farts and groans. One of the secrets in the 2nd and 3rd game was the ability to lock Winston in a large freezer.

In Tomb Raider Chronicles, he sits around a table with various other friends of Lara as they recall Lara's past adventures. He tells the story of how Lara finds the Philosopher's Stone in Rome, while being stalked by Larson Conway and Pierre Dupont. He also tells how Lara stole the "Iris" artefact from Von Croy's company building.

In Tomb Raider: Legend he stands beside the fireplace in Croft Manor and offers advice to Lara in cutscenes. He also appears in the manor level of Tomb Raider: Anniversary.

Zip (airline)

Zip was a Canadian discount airline headquartered in Hangar 101 at Calgary International Airport, Calgary, Alberta. It was launched by Air Canada as a no-frills subsidiary in September 2002. It operated a fleet of 12 Boeing 737 aircraft, each painted in a bright, neon colour (blue, fuchsia, green, and orange) with a single class of service. The subsidiary was headed by former WestJet CEO, Steve Smith.

As a direct competition to Canada's leading low-cost carrier WestJet, Zip flew mostly between the western cities of Abbotsford, Calgary, Edmonton, Vancouver, Saskatoon, Regina and Winnipeg.

Zip ceased operations in September 2004 when Air Canada resumed a full schedule on its western routes.

Branding

Zip was known for branding its advertising with 3 character words. Among them, "yuk" was printed on the air sickness bags, "bag" was printed on the personal baggage tags, and "yum" was printed on the napkins distributed with beverages on board. Large print advertisements were erected in many cities, which simply said "fly" and the company's website below, 4321zip.com. Today, the website redirects to the official Air Canada website, along with other subsidiaries' websites.