Another fissile isotope, uranium 233, can be produced from natural thorium and is also important in nuclear technology.

The most common isotopes of uranium are uranium 238 (which has 146 neutrons and accounts for almost 99.3 of the uranium found in nature) and uranium 235 (which has 143 neutrons, accounting for 0.7 of the element found naturally).

Significant natural resources are iron ore, coal, potash, timber, lignite, uranium, copper, natural gas, salt, nickel, arable land and water.

Finland lacks domestic sources of fossil energy and must import substantial amounts of petroleum, natural gas, and other energy resources, including uranium for nuclear power.

The organ which is most affected is the kidney.

Uranium in the environment refers to the science of the sources, environmental behaviour, and effects of uranium on humans and other animals.

It has a smaller critical mass than uranium.

Furthermore, during the past 10 years, only about two thirds of worldwide demand for nuclear fuel about 68,000 tons of natural uranium equivalent are needed for 2010 was met from resources obtained from mining. The remaining 20,000 tons came from so called secondary uranium sources mainly inventories held by utilities and governments, re processed nuclear fuel, and stockpiles of depleted uranium.

In nature, uranium is found as uranium 238 (99.2739 99.2752 ), uranium 235 (0.7198 0.7202 ), and a very small amount of uranium 234 (0.0050 0.0059 ).

Featured in these images is a new tunnel entrance near the Uranium Conversion Facility (UCF) at Esfahan and continued construction at the Natanz uranium enrichment site.

Encouraged by the rich uranium deposits the Namibian government plans to erect its first nuclear power station by 2018, also uranium enrichment is envisaged to happen locally.

The uranium was seized in a sting operation.

The uranium was delivered in 1993.

Such uranium was the material of choice for terrorists.

But when you look at the natural gas we have it could very well be the bridge to natural gas, because you have plenty of natural gas.

It is its natural manure.

In order to produce plutonium the Israelis needed a large supply of uranium ore.

LEU cannot be used to make weapons.

This feature is available only to nations with a great wealth of fissile uranium.

Iran responded to the demand to stop enrichment of uranium 24 August 2006, offering to return to the negotiation table but refusing to end enrichment.

On 9 April 2007, Iran announced that it has begun enriching uranium with 3 000 centrifuges, presumably at Natanz enrichment site.

The Uranium Enrichment Technology (Prohibition on Disclosure) Regulations 2004 make it an offence to make an unauthorised disclosure of uranium enrichment technology.

This is of crucial importance to us, as our uranium resources are modest.

One example was the announcement that some of its enriched uranium is being diverted to medical research in other words, uranium enrichment, according to this message, can be slowed down.

In most of these cases, however, low enriched uranium (LEU) can be substituted for HEU, or other techniques can be applied to achieve the required results.

First, Iran must halt all enrichment of uranium to 20 purity (a level required for research reactors, but only a short step away, in practical terms, from weapons grade uranium).

An ensuing arms race during the Cold War between the United States and the Soviet Union produced tens of thousands of nuclear weapons that used uranium metal and uranium derived plutonium 239.

After the loss of the community's mining industry, Uranium City began a sharp depopulation.

The extraction of uranium from seawater has been considered as a means of obtaining the element.

Australia has substantial deposits of uranium which account for 30 of the world's known reserves.

Darwin gained extensive experience as he collected and studied the natural history of life forms from distant places.

Police seize 2 tons of uranium in Sopocachi, La Paz, on August 28.

Canada also exports significant amounts of uranium and coal to Asia, Europe and Latin America.

Nuclear power requires low enriched uranium as fuel. Enrich it further, in the same facilities, and you have bomb grade highly enriched uranium (HEU).

Indeed, Iran may already be enriching uranium secretly.

Because of its uranium content, the mineral is radioactive.

Qadaffi exploited a network of opportunity. French controlled mines in Niger provided uranium ore. An undisclosed country conveyed a pilot uranium conversion facility.

It also had to verify the origin of the enriched uranium particles found at a number of locations, and find out how the Islamic Republic of Iran had come into possession of a P 2 uranium enrichment centrifuge technology.

Iraq has reserves of uranium ore which continue to be mined at Akashat, on the border with Syria.

62 30. Effects of the use of armaments and ammunitions containing depleted uranium

Agreement on the supply and leasing of enriched uranium and the transfer of equipment and special nuclear materials

It's normal for almost every region here to make fun of a part of it's own people.

This is a model (natural selection) of the theory of evolution.

Materials that are different, but only slightly so, such as the isotopes of uranium, are very difficult to separate.

The Swedish Museum of Natural History (, literally, the National Museum of Natural History), in Stockholm, is one of two major museums of natural history in Sweden, the other one being located in Gothenburg.