Properties of water
Water (H
2O) is the most abundant compound on Earth's surface, covering 70 percent of the planet. In nature, water exists in liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at standard temperature and pressure. At room temperature, it is a tasteless and odorless liquid, nearly colorless with a hint of blue. Many substances dissolve in water and it is commonly referred to as the universal solvent. Because of this, water in nature and in use is rarely pure and some properties may vary from those of the pure substance. However, there are also many compounds that are essentially, if not completely, insoluble in water. Water is the only common substance found naturally in all three common states of matter and it is essential for all life on Earth. Water makes up 55% to 78% of the human body.
Forms of water
H2O (disambiguation)
H2O is the chemical formula for water, ice or steam.
H2O or H2O may also refer to:
Entertainment
Music
- H2O (H2O album), their self-titled debut album
Other
See also
H2O (H2O album)
H2O is the first album released by H2O. It was released on June 25, 1996. The CD was recorded and mixed in 3 days. H2O did a video for "Family Tree" in the fall of 1996.
Track listing
Personnel
IET
IET can mean any of the following:
Organizations
- Institute of Engineers and Technicians, which became part of the Institution of Incorporated Engineers in 1998 (which then became part of the Institution of Engineering and Technology in 2006)
Tryptophol
Tryptophol is an aromatic alcohol that induces sleep in humans. It is formed in the liver after disulfiram treatment. It is also produced by the trypanosomal parasite in sleeping sickness.
It is also found in wine as a secondary product of alcoholic fermentation. It was first described by Felix Ehrlich in 1912.
Natural occurrences
Tryptophol can be found in Pinus sylvestris needles or seeds.
It is produced by the trypanosomal parasite (Trypanosoma brucei) in sleeping sickness (African trypanosomiasis).
It is found in wine or in beer (although at levels of <23 mg/L in Canadian beers as a secondary product of alcoholic fermentation (a product also known as congener) by Saccharomyces cerevisiae.
It is also an autoantibiotic produced by the fungus Candida albicans.
It can also be isolated from the marine sponge Ircinia spiculosa.
Metabolism
Biosynthesis
It was first described by Felix Ehrlich in 1912. Ehrlich demonstrated that yeast attacks the natural amino acids essentially by splitting off carbon dioxide and re-placing the amino group with hydroxyl. By this reaction, tryptophan gives rise to tryptophol. Tryptophan is first deaminated to 3-indolepyruvate. It is then decarboxylated to indole acetaldehyde by indolepyruvate decarboxylase. This latter compound is transformed to tryptophol by alcohol dehydrogenase.
Institution of Engineering and Technology (professional society)
The Institution of Engineering and Technology (IET) is the largest multidisciplinary professional engineering institution in the world. The IET was formed in 2006 from two separate institutions: the Institution of Electrical Engineers (IEE), dating back to 1871, and the Institution of Incorporated Engineers (IIE) dating back to 1884. Its worldwide membership is currently in excess of 153,000. The IET's main offices are in Savoy Place in London, England and at Michael Faraday House in Stevenage, England.
The IET has the authority to establish professional registration for the titles of Chartered Engineer, Incorporated Engineer, Engineering Technician, and ICT Technician, as a Licensed Member institution of the Engineering Council.
The IET is registered as a charity in England and Wales, and in Scotland.
Formation
Discussions started in 2004 between the IEE and the IIE about merging to form a new institution. In September 2005, both institutions held votes of the merger, and the members voted in favour (73.5% IEE, 95.7% IIE). This merger also needed government approval, so a petition was then made to the Privy Council of the United Kingdom for a Supplemental Charter, to allow the creation of the new institution. This was approved by the Privy Council on December 14, 2005, and the new institution emerged on March 31, 2006.
Podcasts:
