Acid
An acid (from the Latin acidus/acēre meaning sour) is a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. An aqueous solution of an acid has a pH of less than 7 and is colloquially also referred to as 'acid' (as in 'dissolved in acid'), while the strict definition refers only to the solute. An acid usually contains a hydrogen atom bonded to a chemical structure that is still energetically favorable after loss of H+ (a positive hydrogen ion or proton). A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution. Chemicals or substances having the property of an acid are said to be acidic.
There are three common definitions for acids: the Arrhenius definition, the Brønsted-Lowry definition, and the Lewis definition. The Arrhenius definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion to include solvents other than water: an acid is a substance which can act as a proton donor. By this definition, any compound which can be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride.
Acid (computer virus)
Acid is a computer virus which infects .COM and .EXE files including command.com. Each time an infected file is executed, Acid infects all of the .EXE files in the current directory. Later, if an infected file is executed, it infects the .COM files in the current directory. Programs infected with Acid will have had the first 792 bytes of the host program overwritten with Acid's own code. There will be no file length increase unless the original host program was smaller than 792 bytes, in which case it will become 792 bytes in length. The program's date and time in the DOS disk directory listing will not be altered.
The following text strings are found in infected files:
External links
Acid (hip-hop)
Acid (often written ACID; Burmese: အက်စစ်, Burmese pronunciation: [ʔɛʔ sɪʔ]) is a Burmese hip hop group often credited with releasing Burma's first hip hop album, Beginning, in 2000. Two of the group's founders were later imprisoned for the group's allegedly pro-democracy lyrics.
Beginning
Acid was founded by Zayar Thaw, Annaga, Hein Zaw and Yan Yan Chan. In 2000, Acid released Burma's first hip-hop album, Beginning. Despite predictions of failure by many in the Burmese music industry, Beginning remained in the number one position of the Burmese charts for more than two months. A Democratic Voice of Burma reporter described the group's music as blending a "combative, angry style with indigenous poeticism".
The band's repertoire has been said to contain many "thinly veiled attacks" on Burma's military government, the State Peace and Development Council.The Independent stated that while the band "focused on the mundane, their lyrics inevitably touched on the hardships of life in Burma, drawing them into dangerous territory."
Pure
Pure may refer to:
Computing
Companies and products
Literature
Pure (Hayley Westenra album)
Pure is the first internationally published album by Christchurch, New Zealand soprano Hayley Westenra. Her previous albums were released only in New Zealand and nearby Australia. This album also received professional consultation from the legendary Sir George Martin who helped to create its "unique appeal". In 2004, it was the highest selling New Zealand Album and so it privileged Hayley with an award from the New Zealand Music Awards of 2004. It was published by the Decca Music Group label in 2003. It was distributed in the United States by Universal Classics in 2004. During its first week of sales it sold 19,068 copies. As of 2007, Pure is the best selling classical album for the 21st century in the UK.
Pure gives a new freshness to well known classical repertoire, as well as exploring the world of pop and traditional Maori choral singing, including renditions of "Who Painted the Moon Black?", "Hine e Hine" (a song of the Māori, the natives of New Zealand), "In Trutina", from Orff's Carmina Burana, "Wuthering Heights" (a cover of the Kate Bush hit), and the perennial spiritual classic "Amazing Grace". Sir George Martin co-wrote the track "Beat of Your Heart" just for the album. Also on the album is "Pokarekare Ana", a New Zealand love song which has enduring popularity, and has become Hayley's signature song.
Pure (Boney James album)
Pure is the ninth album by jazz saxophonist Boney James, released in 2004.
Tracklist
References
Podcasts:
