Listán negro

Listán negro (also known as Listan Prieto) is a red Spanish wine grape variety that is widely planted in the Canary Islands, particularly on the island of Tenerife where it is a permitted variety in the Denominaciones de Origen (DO) wines of Tacoronte-Acentejo, Valle de la Orotava, Ycoden-Daute-Isora and Valle de Güímar. It is also permitted in the Spanish wine regions of El Hierro, Gran Canaria, La Gomera, La Palma, Lanzarote. Across the Canary Islands more than 5,000 hectares (12,000 acres) are planted to the variety. Listán negro is the black-skin version of the Palomino grape (Listan Blanco) that is used in the production of the fortified wine Sherry.

In 2007, DNA fingerprinting done by the Centro Nacional de Biotecnología in Madrid, Spain discovered that the Mission grape that was widely planted in the earliest New World vineyards in the America was a genetic match to Listán negro. Despite the genetic match, there is enough clonal variation that has occurred over the centuries of geographical separation that the Mission grape of the Americas and the Listán negro grape of the Canary Islands are classified by the Vitis International Variety Catalogue as two separate grape varieties. Part of the variation is likely because some of earliest plantings by the Spanish missionaries were from grape seeds which are the result of pollination and sexual propagation and thus more likely to have slight differences from the parent vine than propagation through cuttings.

Molar

Molar may refer to:

See also:

Molar concentration

Molar concentration, also called molarity, amount concentration or substance concentration, is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of amount of substance in a given volume. A commonly used unit for molar concentration used in chemistry is mol/L. A solution of concentration 1 mol/L is also denoted as 1 molar (1 M).

Definition

Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. For use in broader applications, it is defined as amount of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase c:

Here, n is the amount of the solute in moles,N is the number of molecules present in the volume V (in litres), the ratio N/V is the number concentration C, and N_A is the Avogadro constant, approximately 6.022×10²³mol⁻¹.
Or more simply: 1 molar = 1 M = 1 mole/litre.

In thermodynamics the use of molar concentration is often not convenient, because the volume of most solutions slightly depends on temperature due to thermal expansion. This problem is usually resolved by introducing temperature correction factors, or by using a temperature-independent measure of concentration such as molality.

Molar (tooth)

The molars or molar teeth are large, flat teeth at the back of the mouth. They are more developed in mammals. They are used primarily to grind food during chewing. The name molar derives from Latin, molaris dens, meaning "millstone tooth", from "mola", millstone and dens, tooth. Molars show a great deal of diversity in size and shape across mammal groups.

Human anatomy

In humans, the molar teeth have either four or five cusps. Adult humans have twelve molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a wisdom tooth. It is the last tooth to appear, breaking through the front of the gum at about the age of twenty, although this varies from individual to individual. Ethnicity can also have an impact on the age at which this occurs, with statistical variations between groups. In some cases, it may not even erupt at all.

The human mouth contains upper (maxillary) and lower (mandibular) molars. They are: maxillary first molar, maxillary second molar, maxillary third molar, mandibular first molar, mandibular second molar, and mandibular third molar.

Grape

A grape is a fruiting berry of the deciduous woody vines of the botanical genus Vitis.

Grapes can be eaten raw or they can be used for making wine, jam, juice, jelly, grape seed extract, raisins, vinegar, and grape seed oil. Grapes are a non-climacteric type of fruit, generally occurring in clusters.

History

The cultivation of the domesticated grape began 6,000–8,000 years ago in the Near East.Yeast, one of the earliest domesticated microorganisms, occurs naturally on the skins of grapes, leading to the innovation of alcoholic drinks such as wine. The earliest archeological evidence for a dominant position of wine-making in human culture dates from 8,000 years ago in Georgia. The oldest winery was found in Armenia, dating to around 4000 BC. By the 9th century AD the city of Shiraz was known to produce some of the finest wines in the Middle East. Thus it has been proposed that Syrah red wine is named after Shiraz, a city in Persia where the grape was used to make Shirazi wine. Ancient Egyptian hieroglyphics record the cultivation of purple grapes, and history attests to the ancient Greeks, Phoenicians, and Romans growing purple grapes for both eating and wine production. The growing of grapes would later spread to other regions in Europe, as well as North Africa, and eventually in North America.

Shades of violet

There are numerous variations of the color violet, a sampling of which are shown below.

Variations of the color violet

Variations of spectral violet

Although pure spectrum violet is outside the color gamut of the RGB color space, the three colors displayed below are rough approximations of the range of colors of actual spectral violet, although the accuracy of the approximation can vary depending on the individual's color vision, and on the color rendition of one's computer monitor.

Color wheel violet

The tertiary color on the HSV color wheel (also known as the RGB color wheel) precisely halfway between blue and magenta is called color wheel violet. This tone of violet—an approximation of the color violet at about 417 nanometers as plotted on the CIE chromaticity diagram—is shown at right. This tone of violet is actually somewhat toward indigo assuming indigo is accepted as a separate spectrum color, usually quoted as having a range of from about 420 to 450 nanometers. Another name for this color is near violet.

Grape (disambiguation)

A grape is a fruit that grows on the vines of plants in the genus Vitis.

Grape may also refer to:

See also