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Tungsten

tungsten

1. (Science: chemistry, element) A rare element of the chromium group found in certain minerals, as wolfram and scheelite, and isolated as a heavy steel-gray metal which is very hard and infusible. It has both acid and basic properties. When alloyed in small quantities with steel, it greatly increases its hardness.

2 <chemical> scheelite, or calcium tungstate. Tungsten ocher, or tungstic ocher, tungstate.

Abbreviation: W

Origin: Sw. Tungsten (cf. Dan. Tungsteen, G. Tungstein); tung heavy (akin to Dan. Tung, Icel. Thungr) _ sten stone. (Wolframium).


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Re: Theories - Origin of Life

... if late meteorite bombardment triggered the onset of the current style of mantle convection. Willbold, M., T. Elliott, et al. (2011). "The tungsten isotopic composition of the Earth/'s mantle before the terminal bombardment." Nature 477(7363): 195-198. Btw these researchers are basing ...

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by scottie
Tue Oct 04, 2011 10:14 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 889458

The Fiber Disease

... in the late 60s in the department. They were able to record single units from individual axons in human nerves with electrodes manufactured from tungsten wires. They did the pioneer work of developing the method recording from muscle afferents such as muscle spindles. This project continued to ...

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by Skytroll
Wed Oct 25, 2006 3:14 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5413222

The Fiber Disease

... the resulting energetic ions are projected against the anode. It is then observed that machined parts from normally nonmagnetic materials such as tungsten carbide, as well as the carbon residue from the oil, become ferromagnetic from the accumulation of neutral magnetic filaments. Condensation ...

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by Nadas Moksha
Mon Oct 02, 2006 2:29 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5413222


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