Acids in wine

The acids in wine are an important component in both winemaking and the finished product of wine. They are present in both grapes and wine, having direct influences on the color, balance and taste of the wine as well as the growth and vitality of yeast during fermentation and protecting the wine from bacteria. The measure of the amount of acidity in wine is known as the “titratable acidity” or “total acidity”, which refers to the test that yields the total of all acids present, while strength of acidity is measured according to pH, with most wines having a pH between 2.9 and 3.9. Generally, the lower the pH, the higher the acidity in the wine. However, there is no direct connection between total acidity and pH (it is possible to find wines with a high pH for wine and high acidity). In wine tasting, the term “acidity” refers to the fresh, tart and sour attributes of the wine which are evaluated in relation to how well the acidity balances out the sweetness and bitter components of the wine such as tannins. Three primary acids are found in wine grapes: tartaric, malic and citric acids. During the course of winemaking and in the finished wines, acetic, butyric, lactic and succinic acids can play significant roles. Most of the acids involved with wine are fixed acids with the notable exception of acetic acid, mostly found in vinegar, which is volatile and can contribute to the wine fault known as volatile acidity. Sometimes, additional acids, such as ascorbic, sorbic and sulfurous acids, are used in winemaking.

Acid (disambiguation)

An acid is any chemical compound that, when dissolved in water, gives a solution with a pH less than 7.0.

Acid or ACID may also refer to:

Science

Computing

Music

Genres

Bands

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

Kat

Kat is a common nickname for the feminine given name Katherine, Kathleen, Katarina, Katrina, Kathryn, and variations.

Kat or KAT may also refer to:

People

Individuals

Fictional

Kat (band)

Kat is a Polish heavy metal band formed in 1979 in Katowice, Poland. They have been accused, mainly by the Polish media, of promoting Satanism.

In Polish "kat" means executioner. KAT is one of the most important bands in Polish heavy metal overall, and is also mentioned as one of the main precursors of thrash and even black metal genres in this country. KAT's most famous album is Oddech wymarłych światów (The Breath of Extinct Worlds), considered an opus of Polish heavy metal.

The band is best known for tracks "Czas zemsty" (Time of revenge), "Łza dla cieniów minionych" (A tear for the shadows gone), "Wyrocznia" (Oracle) and "Noce Szatana " (The nights of Satan).

Band history

KAT was founded in 1979 by guitarist Piotr Luczyk and drummer Ireneusz Loth. Shortly after they were joined by bassist Tomasz Jaguś and another guitarist, Ryszard Pisarski. They played instrumental music influenced by hard rock bands, mainly Deep Purple, Led Zeppelin, and Black Sabbath. In 1981, during the first edition of the Silesian Rock festival, the band found a singer, Roman Kostrzewski The line-up was filled out by guitarist Wojciech Mrowiec and in 1984 KAT released the debut single "Noce szatana / Ostatni tabor" (Polish for The Nights of Satan / The Last Train). Robert "Lor" Milewski wrote the lyrics of both songs; since then Kostrzewski became the lyricist, incorporating poetry, Polish folklore, and mysticism. The band also toured with Hanoi Rocks.

KAT-7

KAT-7 is a radio telescope constructed in the Northern Cape of South Africa. Part of the Karoo Array Telescope project, it is the precursor engineering test bed to the larger MeerKAT telescope, but it has become a science instrument in its own right. The construction was completed in 2011 and commissioned in 2012. It also served as a technology demonstrator for South Africa's bid to host the Square Kilometre Array. KAT-7 is the first Radio telescope to be built with a composite reflector and uses a stirling pump for 75 K cryogenic cooling. The telescope was built to test various system for the MeerKAT array, from the ROACH correlators designed and manufactured in Cape Town, now used by various telescopes internationally, to composite construction techniques. With the short baselines the telescope is suited to observing diffuse sources, but will begin VLBI observation in 2013.

Technical Specifications

KAT-7 consist of 7 dishes of 12 metres in diameter each a Prime Focus Reflecting telescope.