mercury

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mercury

 (Hg) [mer´ku-re]
a chemical element, atomic number 80, atomic weight 200.59. (See Appendix 6.) Mercury forms two sets or classes of compounds: mercurous, in which a single atom of mercury combines with a monovalent radical, and mercuric, in which a single atom of mercury combines with a bivalent radical. Mercury and its salts can be absorbed by the skin and mucous membranes, causing chronic poisoning (see mercury poisoning). The mercuric salts are more soluble and irritant than the mercurous.
ammoniated mercury a compound used as an antiseptic skin and ophthalmic ointment. It should be applied with caution, as excessive use may irritate the skin and cause dermatitis.
mercury bichloride an extremely poisonous compound formerly used in treatment of syphilis but now used only as a disinfectant.
mercury poisoning acute or chronic disease caused by exposure to mercury or its salts; an important aspect is its toxic effect on the brain, causing impaired judgment, memory loss, sleeplessness, and nervousness. The acute form, due to ingestion, is marked by severe abdominal pain, metallic taste in the mouth, vomiting, oliguria or anuria at onset, followed by bloody diarrhea, and corrosion and ulceration of the entire digestive tract. The chronic form, due to absorption by the skin and mucous membranes, inhalation of vapors, or ingestion of mercury salts, is marked by stomatitis, metallic taste in the mouth, a blue line along the border of the gum, sore hypertrophied gums that bleed easily, loosening of the teeth, excessive salivation, tremors and incoordination, and psychiatric symptoms including abnormal excitability, anxiety, and social withdrawal. A common cause of chronic mercury poisoning is the ingestion of contaminated fish. Because of this, some fishing areas are posted with signs recommending limiting consumption of fish caught there. See also minamata disease.
Treatment. Treatment consists of removal of the source of exposure and administration of a chelating agent. Exchange transfusions and removal of mercury by surgery are options in selected patients. Consultation with a toxicologist is warranted.

mer·cu·ry (Hg),

(mĕr'kyū-rē),
A dense liquid metallic element, atomic no. 80, atomic wt. 200.59; used in thermometers, barometers, manometers, and other scientific instruments; some salts and organic mercurials are used medicinally; care must be followed with its handling; 197Hg (half-life of 2.672 days) and 203Hg (half-life of 46.61 days) have been used in brain and renal scanning.
Synonym(s): hydrargyrum, quicksilver
[L. Mercurius, Mercury, the god of trade, messenger of the gods; in Mediev. L., quicksilver, mercury]

mercury

A liquid metallic element (atomic number 80; atomic weight 200.59) often obtained from cinnabar, a major mercury ore. Mercury preparations used in healthcare have minimal toxicity and mercury-based agents have been used as diuretics, topical antiseptics and in dental amalgams, and are thought to be relatively safe; the practice of removing dental amalgams is believed by toxicologists to cause a marked short-term increase in mercury levels. The cardioprotective effect of n-3 fatty acids may be reduced by the high mercury content of fish.

Alternative dentistry
See Dental amalgam.

Homeopathy
Merc sol, see there; Mercurius solubilis.
 
Toxicology
A highly toxic heavy metal widely used in household products (e.g., as a fungicide in latex paints) which is absorbed via skin and lungs.

Clinical findings
• Inorganic mercury causes nausea, diarrhoea, renal toxicity.
• Organic mercury causes neuromuscular defects (e.g., loss of co-ordination), myalgias, brain dysfunction and “mad hatter” disease (which may be misinterpreted as a mental disorder).

Specimen
24-hour urine.

Ref range
0–20 µg/L.
 
Toxic range
> 150 µg/L.
 
Method
Atomic absorption spectrophotometry.

mer·cu·ry

(Hg) (mĕr'kyūr-ē)
A dense, liquid metallic element, atomic no. 80, atomic wt. 200.59; used in thermometers, barometers, manometers, and other scientific instruments; some salts and organic mercurials are used medicinally; 197Hg (half-life of 2.672 days) and 203Hg (half-life of 46.61 days) have been used in brain and renal scanning.

mer·cu·ry

(mĕr'kyūr-ē)
A dense liquid metallic element; used in thermometers, barometers, manometers, and other scientific instruments; some salts and organic mercurials are used medicinally; must be handled with care.
References in periodicals archive ?
There is at least one person who is a Mercurian who lies.
Syal and colleagues first estimated that the infall of comet stuff during the past 200 million years could have infused the top layer of Mercurian dirt with 3% to 6% carbon.
Mapping of the Mercurian terra incognita was virtually completed by the Messenger spacecraft's second encounter (Journal, 119(1), 4-5 (2009)).We received a small number of good visual and webcam Mercury observations.
The short term of the Belgian Everard Mercurian as head of the order, from 1573 until his death in 1580, is sandwiched between the better known figures of Ignatius Loyola himself, Diego Lainez, and Francis Borja, the first three generals, and the long term of Claudio Aquaviva from 1581 to 1615.
He had been assigned to a quiet life in his native land, ostensibly for reasons of poor health, but rumors circulated about his strained relations with the Society's first non-Spanish general, the Fleming Everard Mercurian. Shortly after his arrival Ribadeneyra was accused of having been among a group of disgruntled Spanish Jesuits who presented reports, or memoriales, critical of Mercurian's leadership to Philip II, an allegation that he strenuously denied.(33) In launching a passionate defense of his conduct in the Confessions, Ribadeneyra dramatically changed his tone.
Instead, explains geochemist Larry Nittler (Carnegie Institution of Washington), Mercurian rocks are infused with lots of magnesium, a chemical signature unique among the terrestrial worlds.
That the Mercurian surface is also mercurial--and surprisingly lovely--reminds us that we have only begun to explore our solar system.
Harmon notes that the still-unnamed Mercurian crater was seen in previous radar campaigns but with only a tenth as much resolution.
(45) James Keenan, "The Casuistry of John Major, Nominalist Professor of Paris (1506-1531)," Annual of Society of Christian Ethics (1993) 205-22; "William Perkins (1558-1602) and the Birth of British Casuistry," The Context of Casuistry 105-30; "The Casuistry of Francisco de Toledo, (1532-1596)," Mercurian Collection, Thomas McCoog, ed.
Conceptions of this kind correspond to the idea of the existence of warrior people and trader people, or, to adopt Yuri Slezkine's terminology, "Appollonians" and "Mercurians." (43) Russians--and, more broadly speaking, Slavs--subscribed to the widespread proposition that not only Jews but also "Caucasians," "Central Asians," and in general those who could be considered "other" were unsuitable for military service.
VIRGO Aug 23> Sep 22 AS with your fellow Mercurians, both you and Gemini must be on your guard when Mercury goes into reverse.
Mercurians are excellent orators and have the capacity to mesmerise their listeners with their speeches.