Russian

Russian refers to anything related to Russia, including:

Russian may also refer to:

See also

Russian White, Black and Tabby

The Russian White, Russian Black, and Russian Tabby are breeds of cat created in 1971, derived from the Russian Blue. The Black and Tabby Russians came from the original mating which created the Russian White. It is appropriate to consider their origins first.

The Russian White Program

In the UK, Frances McLeod of Arctic began breeding Russian Whites and Russian Blacks in the 1960s.

In Australia, The Russian White program started on the 4 May 1971 by Dick and Mavis Jones of Myemgay Cattery. Below is an excerpt from an article by Mavis Jones.

Russian wine

Russian wine refers to wine made in the Russian Federation and to some extent wines made in the former Union of Soviet Socialist Republics though this later referencing is an inaccurate representation of wines from Armenia, Azerbaijan, Georgia, Moldova, Ukraine. The phrase Russian wine more properly refers to wine made in the southern part of the Russian Federation-including the areas around Dagestan, Chechnya, Kabardino-Balkaria, Krasnodar Krai, Rostov, and Stavropol Krai. Russia currently has the following controlled appellations that correspond to the sorts of grapes: Sibirkovy (Сибирьковый), Tsimlyanski Cherny (Цимлянский чёрный), Plechistik (Плечистик),Narma (Нарма), and Güliabi Dagestanski (Гюляби Дагестанский).

History

Wild grape vines have grown around the Caspian, Black and Azov seas for thousands of years with evidence of viticulture and cultivation for trade with the Ancient Greeks found along the shores of the Black Sea at Phanagoria and Gorgippia. It is claimed that the Black Sea area is the world's oldest wine region.

Population

A population is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding.

In ecology, the population of a certain species in a certain area is estimated using the Lincoln Index. The area that is used to define a sexual population is defined as the area where inter-breeding is potentially possible between any pair within the area. The probability of interbreeding is greater than the probability of cross-breeding with individuals from other areas. Under normal conditions, breeding is substantially more common within the area than across the border.

In sociology, population refers to a collection of humans. Demography is a social science which entails the statistical study of human populations. This article refers mainly to human population.

Population genetics (ecology)

In population genetics a sexual population is a set of organisms in which any pair of members can breed together. This means that they can regularly exchange gametes to produce normally-fertile offspring, and such a breeding group is also known therefore as a gamodeme. This also implies that all members belong to the same of species, such as humans. If the gamodeme is very large (theoretically, approaching infinity), and all gene alleles are uniformly distributed by the gametes within it, the gamodeme is said to be panmictic. Under this state, allele (gamete) frequencies can be converted to genotype (zygote) frequencies by expanding an appropriate quadratic equation, as shown by Sir Ronald Fisher in his establishment of quantitative genetics.

Population (disambiguation)

Population may refer to:

Human population

Metallicity

In astronomy and physical cosmology, the metallicity or Z is the fraction of mass of a star or other kind of astronomical object that is not in hydrogen (X) or helium (Y). Most of the physical matter in the universe is in the form of hydrogen and helium, so astronomers use the word "metals" as a convenient short term for "all elements except hydrogen and helium". This usage is distinct from the usual physical definition of a solid metal. The astronomical usage is claimed to be justified because in the high-temperature and pressure environment of a star, atoms do not undergo chemical reactions and effectively have no chemical properties, including that of being a metal as usually understood. For example, stars and nebulae with relatively high abundances of carbon, nitrogen, oxygen, and neon are called "metal-rich" in astrophysical terms, even though those elements are non-metals in chemistry.

The distinction between hydrogen and helium on the one hand and metals on the other is relevant because the primordial universe is believed to have contained virtually no metals, which were later synthesised within stars.