Dictionary » A » Arsenic



1. (Science: chemistry) One of the elements, a solid substance resembling a metal in its physical properties, but in its chemical relations ranking with the nonmetals. It is of a steel-gray colour and brilliant luster, though usually dull from tarnish. It is very brittle, and sublimes at 356 deg fahrenheit. It is sometimes found native, but usually combined with silver, cobalt, nickel, iron, antimony, or sulphur. Orpiment and realgar are two of its sulphur compounds, the first of which is the true arsenticum of the ancients. The element and its compounds are active poisons. Specific gravity from 5.7 to 5.9. Atomic weight. Symbol as.

2. Arsenious oxide or arsenious anhydride; called also arsenious acid, white arsenic, and ratsbane.

(Science: chemistry) Pertaining to, or derived from, arsenic; said of those compounds of arsenic in which this element has its highest equivalence; as, arsenic acid.

Origin: L. Arsenicum, gr, yellow orpiment, perh. Fr. Or better attic masculine, male, on account of its strength, or fr. Per. Zernikh: cf. F. Arsenic.

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Choosing a yeast vector

Hello, I have cloned several plant arsenic transporters and would like to express them in yeast to see if they can partially rescue an arsenic-sensitive yeast strain. I am wondering how I choose an expression vector that is compatible with ...

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by alyson2324
Thu Aug 02, 2012 4:54 pm
Forum: Molecular Biology
Topic: Choosing a yeast vector
Replies: 0
Views: 1797

"Diseased" Seals along the Alaskan Coast

Not heavy metals per se -Mercury Arsenic CadmiumLead etc. could indeed provoke toxicity but wouldn't necessarily implicte from Fukushima.

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by JorgeLobo
Fri Mar 09, 2012 3:05 am
Forum: Ecology
Topic: "Diseased" Seals along the Alaskan Coast
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Views: 3960


... for life). There is also anaerobic respiration as in the case with some microbes that can use an alternate electron acceptor such as iron, arsenic, etc etc. These cells do not use oxygen. Glycolysis refers to an energy production pathway, but it is not a cellular respiration pathway. It ...

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by daniel.kurz
Fri Nov 18, 2011 3:07 pm
Forum: Cell Biology
Topic: Mitochondrial energy pathways
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Views: 7784

Substitutes for DNA and RNA in alien life?

You may have already seen this, but if you haven't you shoul read it now: NASA Life Discovery: New Bacteria Makes DNA With Arsenic (http://news.nationalgeographic.com/news/2010/12/101202-nasa-announcement-arsenic-life-mono-lake-science-space/) But, if you want something totally different, ...

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by DRT23
Mon Mar 07, 2011 6:24 pm
Forum: Molecular Biology
Topic: Substitutes for DNA and RNA in alien life?
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Views: 2268

Any SOLID arguments against evolution?

... on a nuclear reactor ( Deinococcus radiodurans ) or at temperatures above 100ÂșC without light, or at pH close to 14, or in a lake chocfull of arsenic? -Dinosaur: provide evidence. And even if one had survived, that would not mean anything more than 1 dinosaur had survived. remember evolution ...

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by canalon
Fri Feb 11, 2011 9:21 pm
Forum: Evolution
Topic: Any SOLID arguments against evolution?
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