Wednesday, May 15, 2013

New Weapons Detail Reveals True Depth of Cuban Missile Crisis

The Cuban Missile Crisis was the closest the world has come to nuclear war, but exactly how close has been a matter of some speculation. The conflict, itself, has been analyzed and interpreted, but the number and types of nuclear weapons that were operational have not. According to fresh analysis available today in the Bulletin of the Atomic Scientists, published by SAGE, senior experts calculate the nature of weapons capabilities on both sides, and write that the situation was even more perilous than history has previously acknowledged. The details on the number and status of weapons—known as the nuclear order of battle—has remained widely overlooked by many authors, experts, and researchers over the past five decades. Several types of US and Soviet nuclear weapons were operational, some on high levels of alert and readily available to use. This information was often omitted by authors in their writing. The three main catagories that must be analyzed are...
    • Local forces, which were the Soviet and US nuclear weapons in and around Cuba;
    • Regional forces, which were both the US tactical weapons in Europe that could hit targets in the Soviet Union, as well as the Soviet weapons in western USSR that were aimed at European targets;
    • Global forces, which included the US strategic nuclear weapons—intercontinental ballistic missiles (ICBM), submarine-launched ballistic missiles (SLBM), and long-range bombers—that could reach the Soviet Union, and, of course, the Soviet strategic nuclear weapons that could reach the United States.
 158 Soviet nuclear warheads of five types were already in Cuba by the time the military blockade was imposed on October 24th. Still, 50 years later, it is unknown how ready they were or whether they were specifically targeted at US cities. US Joint Chiefs of Staff considered using nuclear weapons during a Cuban invasion, but by October 31st had decided against this.In Europe, the United States had approximately 500 nuclear weapons at its disposal to attack targets in the western Soviet Union. With its 550 nuclear weapons, the Soviet Union had a slightly larger arsenal to hit European targets. By reviewing these numbers, it is revealed that the crisis was more serious and more dangerous than previously thought.

http://www.sciencedaily.com/releases/2012/10/121012074701.htm

Wednesday, May 1, 2013

Bioremediation of Toxic Metals Using Worms: Earthworms Soak Up Heavy Metal

It has recently been discovered that earthworms could be used to extract toxic heavy metals, including cadmium and lead, from solid waste from domestic refuse collection and waste from vegetable and flower markets. Three species of earthworm, Eudrilus eugeniae, Eisenia fetida and Perionyx excavates can be used to assist in the composting of urban waste and to extract heavy metals, cadmium, copper, lead, manganese, zinc, prior to subsequent processing. Since the population is rapidly increasing, there is a growing problem of how to manage organic waste and to find alternatives to landfill disposal particularly for domestic food waste and that from vegetable markets. A lot of waste is currently dumped on the outskirts of many towns and cities and is causing serious pollution, disease risk and general ecological harm. It also represents a considerable wasted resource, whereas the organic matter might be exploited usefully in growing food crops. The process of vermicomposting in this way allows such waste materials to be remediated and the compost used subsequently for use in growing human food without the risk of accumulating heavy metals in crops making it safe for everyone. How this possible one might ask? Well the worms' digestive system is apparently capable of detaching heavy metal ions from the complex aggregates between these ions and humic substances in the waste as it rots. Various enzyme-driven process then seem to lead to assimilation of the metal ions by the worms so that they are locked up in the organism's tissues rather than being released back into the compost as worm casts. The separation of dead worms from compost is a relatively straightforward process allowing the heavy metal to be removed from the organic waste.

http://www.sciencedaily.com/releases/2012/08/120816133420.htm