calcium

Definitions

  • Calcium carbide producing furnace
    Calcium carbide producing furnace
  • WordNet 3.6
    • n calcium a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
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Webster's Revised Unabridged Dictionary
  • Interesting fact: People who meet their calcium need reduce their risk of developing kidney stones
    • n Calcium kăl"sĭ*ŭm (Chem) An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a member of the alkaline earth group of elements. Atomic weight 40. Symbol Ca.Calcium is widely and abundantly disseminated, as in its compounds calcium carbonate or limestone, calcium sulphate or gypsum, calcium fluoride or fluor spar, calcium phosphate or apatite.
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Century Dictionary and Cyclopedia
  • Interesting fact: Half of a cup of figs will give you just as much calcium as half a cup of milk
    • n calcium Chemical symbol, Ca; atomic weight, 40. A metal having a light-yellow color and brilliant luster, about as hard as gold, very ductile, and having a specific gravity of about 1.57. It oxidizes readily in moist air, and at a red heat burns vividly, forming calcium oxid, CaO, or quicklime, one of the alkaline earths. On adding water this forms calcium hydrate, Ca(OH)2 or slaked lime. Calcium is not found native in the metallic state, but it unites with most of the non-metallic elements in compounds which are widely distributed in nature and extensively used. The mineral calcite, all limestone or marble, and the chalk deposits are calcium carbonate; gypsum is calcium sulphate; and calcium also enters into the composition of nearly all the native silicates.
    • n calcium A calcium light.
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Chambers's Twentieth Century Dictionary
  • Interesting fact: Chocolate not only does not promote tooth decay, it might prevent it. According to the American Dental Association, milk chocolate contains ingredients, such as calcium and phosphate, that might modify acid production in the mouth that leads to cavities. Some oils in chocolate might also prevent tooth decay. Chocolate does contain sugar, of course, but these are simple sugars that are less harmful than the complex sugars contained in other foods.
    • n Calcium kal′si-um the metal present in chalk, stucco, and other compounds of lime
    • v.t Calcium to wash with such
    • v.i Calcium to become a calx or powder by heat
    • v.t Calcium and v.i. Cal′cify, to make calcic: to turn into bony tissue
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Etymology

Webster's Revised Unabridged Dictionary
NL., from L. calx, calcis, lime; cf F. calcium,. See Calx

Usage

In literature:

The marine phosphate beds originally consist principally of calcium phosphate and calcium carbonate in varying proportions.
"The Economic Aspect of Geology" by C. K. Leith
Phosphorescent substances, such as calcium sulphide show this effect, as also do various specimens of fluor-spar.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8" by Various
If calcium chloride be used the precipitated calcium sulphate must be removed by filtration.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3" by Various
I had smelled of the calcium, and there was no more clerking for me.
"The Scrap Book, Volume 1, No. 1" by Various
C., and dried by means of calcium chloride.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6" by Various
It is a calcium-magnesium metasilicate, CaMg(SiO3)2, and crystallizes in the monoclinic system.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5" by Various
Calcium colors the flame orange-red, distinguished from strontium, by appearing gray when seen through blue glass.
"The Elements of Blowpipe Analysis" by Frederick Hutton Getman
Of these elements, those most likely to be deficient either in total amount or in availability are nitrogen, phosphorus, potassium and calcium.
"A Living from the Land" by William B. Duryee
All cements having calcium sulphate as their base are suitable only for indoor work because of the solubility of this substance.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various
Milk is so rich in calcium that it requires only 400 c.c.
"Dietetics for Nurses" by Fairfax T. Proudfit
The second group includes iron, calcium, magnesium, and, generally, sulfur.
"The Chemistry of Plant Life" by Roscoe Wilfred Thatcher
The lime molecule is composed of one atom of calcium and one of oxygen.
"Nature's Miracles, Volume 1" by Elisha Gray
It is a hydrous potassium and calcium silicate, H7KCa4(SiO3)8 + 4-1/2(H2O).
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3" by Various
The small quantity of water still contained is removed by leaving it in contact with metallic calcium.
"The New Gresham Encyclopedia. Vol. 1 Part 1" by Various
It is a compound of calcium phosphate with calcium fluoride or chloride.
"The New Gresham Encyclopedia. Vol. 1 Part 2" by Various
Salt may contain magnesium and calcium chlorides, which of course are undesirable in large amounts.
"Soap-Making Manual" by E. G. Thomssen
Calcium carbide is a compound of calcium and carbon.
"Electricity and Magnetism" by Elisha Gray
We waited and watched till we heard a faint "hurrah", and soon, in the distance, a calcium light burned red and long.
"A Cry in the Wilderness" by Mary E. Waller
Take, for instance, the dissociation of calcium carbonate into calcium oxide and carbon dioxide.
"The Phase Rule and Its Applications" by Alexander Findlay
Their photographs showed the calcium and hydrogen lines in the prominence spectrum.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10" by Various
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In news:

0CT scan of the heart quickly shows where calcium is bulding up in the arteries.
Before the signs of first leaves, begin to fertilize with calcium-based formulas, like 15-0-15 or 13-2-13 at 75 ppm.
Just a decade after the the calcium-sensing receptor (CaR) was identified, pharmacological manipulation of the CaR is about to enter routine practice.
A new study proposes two early solar system solids — chondrules and calcium-aluminum rich inclusions — formed at the same time.
This herb , typically grown on the English roadside, is loaded with nutrients including vitamins A and C, calcium, magnesium and iron.
Chamomile (Matricaria chamomila) is rich in calcium and magnesium, making it a natural nervince, useful for calming nerves and upset stomachs and promoting sleep.
Not only does coconut water hydrate you, but it also contains more magnesium, calcium and potassium than other juices, according to the.
In Holly McCord's new book, "The Ice Cream Diet," a diet high in calcium keeps fat-burners in the body high.
A latte can deliver a full serving of milk's nine essential nutrients, including calcium, vitamin D and potas­sium.
Amiloride- insensitive cation conductance in Xenopus laevis olfactory neurons: a combined patch clamp and calcium imaging analysis.
The study is limited because the sample had a lower calcium intake than the national average.
ORANGE, Calif — Without magnesium , calcium supplements increase risk of heart attacks, according to a meta-analysis recently conducted by Carolyn Dean, medical director of the Nutritional Magnesium Association.
Limestone, Calcium And Magnesium .
Find information on bone density, calcium, and what you can to to prevent osteoporosis .
Do your bones a favor and make this calcium- and magnesium-rich Bone-Strengthening Salad.
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In science:

The primary brightness patterns revealed in two-dimensional images obtained in the ionized calcium H and K lines include bright plages, chromospheric network located at the boundaries of supergranular cells, and bright points in the interior of the cells – internetwork grains or K2V bright points.
The relationship between chromospheric emissions and magnetic field strength
The evolution of all ma jor shell closures has been extensively discussed in a recent review , to which the reader is referred to. I will start in the region of light elements between oxygen and calcium, where the shell structure is modified by the residual interaction.
New magic numbers
Chromospheric radiation approximation Chromospheric radiative losses are dominated by a small number of strong lines from hydrogen, calcium and magnesium (Vernazza et al. 1981).
The stellar atmosphere simulation code Bifrost
The Bifrost approximations come close to describing the cooling in both hydrogen and calcium except that the cooling is overestimated in hydrogen just below the transition region (left part of the figure).
The stellar atmosphere simulation code Bifrost
Hippocampus increased expression of enzymes involved in glucose utilization Change in gene transcription Increased level of calcium in the central nervous system Table 1.
The physical condition from the perspective of complexity: Application of a physical activity program for Alzheimer's disease
Notice the emerging class of Calcium-rich halo transients, .
Cosmic Explosions (Optical Transients)
Their disappearance from the Ca ii H passband images taken with the Solar Optical Telescope (SOT) on-board the Hinode spacecraft has been interpreted as heating which causes the singly ionised calcium to become at least doubly ionised.
Off-limb (spicule) DEM distribution from SoHO/SUMER observations
In particular, SLC25A12 encodes a calcium-binding mitochondrial carrier protein whose expression has been associated with hypertension in mice (C. E. Rasmussen & C. K. I.
An efficient group test for genetic markers that handles confounding
When a calcium solution migrates through “crown” Ether (resin or liquid), Ca2+ ions are attracted by negative charged O− of the CO dipole in Ether.
Review of double beta experiments
We note that the current CANDLES-III detector could reach the same sensitivity if calcium was enriched to 13% using AVLIS method.
Review of double beta experiments
The model is very simple, and the uncertainties are large, but it is nevertheless reassuring to find that the very different values of observed polarization in the two calcium lines is consistent with a single value of Pcorr , around 0.35-0.45.
Spectropolarimetry of the Type Ia SN 2007sr Two Months After Maximum Light
Also possible are heavy-ion collisions with nuclei up to lead: used as a lead-lead collider, the LHC would have a centre-of-mass energy up to 1.2 PeV and a luminosity of up to 1027 cm−2 sec−1 , whilst the luminosity could be higher if lighter calcium is used.
Testing the Standard Model and Beyond
Example parameters are given for the case of calcium ions.
The Ion Trap Quantum Information Processor
Example values are given for the singly-charged calcium ion.
The Ion Trap Quantum Information Processor
Then the LHC is scheduled to start taking data in 2005, with the capability to make pp, pA and AA collisions, where the nuclei A range from Calcium to Lead.
Summary of DIS 98
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