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  • forms
  • The effects of temperature, time and humidity were investigated to determine their influence on the kinetics of dehydration/hydration of different hydration forms of calcium sulfate. (wku.edu)
  • chloride
  • Crystals of the tetrahydrate can be prepared by reacting sodium pyrophosphate, Na4P2O7 with calcium nitrate, Ca(NO3)2, at carefully controlled pH and temperature: Na4P2O7(aq) +2 Ca(NO3)2(aq) → Ca2P2O7·4 H2O + 2 Na2NO3 The dihydrate, sometimes termed CPPD, can be formed by the reaction of pyrophosphoric acid with calcium chloride: CaCl2 + H4P2O7(aq) → Ca2P2O7·2 H2O + HCl. (wikipedia.org)
  • Calcium arsenate is commonly prepared from disodium hydrogen arsenate and calcium chloride: 2 Na2H[AsO+ 3 CaCl2 → 4 NaCl + Ca3[AsO + 2 HCl In the 1920s, it was made in large vats by mixing calcium oxide and arsenic oxide. (wikipedia.org)
  • Scrubbing with limestone follows the following idealized reaction: SO2 + CaCO3 → CaSO3 + CO2 Scrubbing with hydrated lime follows the following idealized reaction: SO2 + Ca(OH)2 → CaSO3 + H2O In the laboratory calcium sulfite can be produced by reaction of aqueous solutions of calcium chloride and sodium sulfite. (wikipedia.org)
  • The compound is also added to fresh-cut fruits, such as cantaloupes, to keep them firm and extend their shelf life, without the bitter taste caused by calcium chloride, which can also be used for this purpose. (wikipedia.org)
  • Calcium lactate has been considered as a coagulant for removing suspended solids from water, as a renewable, non-toxic, and biodegradable alternative to aluminum chloride AlCl 3. (wikipedia.org)
  • citation needed
  • Calcium borate (Ca3(BO3)2), also called Gerstley borate[citation needed], is a bluish white crystal with a very defined structure. (wikipedia.org)
  • citation needed] While the best possible reaction to fire classifications are A1 (construction applications) and A1Fl (flooring applications) respectively, both of which mean "non-combustible" according to EN 13501-1: 2007, as classified by a notified laboratory in Europe, some calcium-silicate boards only come with fire classification of A2 (limited combustibility) or even lower classifications (or no classification), if they are tested at all. (wikipedia.org)
  • citation needed] Calcium lactate is also used to treat hypocalcaemia (calcium deficiencies). (wikipedia.org)
  • reaction
  • Inside the reaction chamber, a calcium rich media ( aragonite ), mainly CaCO 3 , is forced into contact with water injected with carbon dioxide (CO 2 ) in order to create carbonic acid (H 2 CO 3 ). (wikipedia.org)
  • It may be formed by reaction of the elements, but it is more commonly prepared by carbothermal reduction of calcium phosphate: Ca3(PO4)2 + 8 C → Ca3P2 + 8 CO The structure of the room temperature form of Ca3P2 has not been confirmed by X-ray crystallography. (wikipedia.org)
  • When strongly heated in air, calcium bromide will react with oxygen to produce calcium oxide and bromine: 2 CaBr2 + O2 → 2 CaO + 2 Br2 In this reaction the oxygen oxidizes the bromide to bromine. (wikipedia.org)
  • tofu
  • Finally, a very helpful non-dairy food for boosting your calcium intake is tofu. (whfoods.com)
  • One of the reasons for tofu's rich calcium content involves the tofu production process itself since calcium is often used to help cause precipitation of the soy milk (i.e., conversion of the soy milk into a more solid form). (whfoods.com)
  • Cell Calcium
  • Cell Calcium is critical and highly regulated by the cells. (medicalnewstoday.com)
  • Cell Calcium is a monthly peer-reviewed scientific journal published by Elsevier that covers the field of cell biology and focuses mainly on calcium signalling and metabolism in living organisms. (wikipedia.org)
  • The journal is abstracted and indexed in: BIOSIS Cambridge Scientific Abstracts Current Awareness in Biological Sciences Current Contents/Life Sciences EMBASE MEDLINE/PubMed Science Citation Index Scopus According to the Journal Citation Reports, Cell Calcium has a 2012 impact factor of 4.327. (wikipedia.org)
  • CaCl2
  • CaCl2 + Na2SO3 → CaSO3 + 2 NaCl The structure of calcium sulfite has been examined by X-ray crystallography. (wikipedia.org)
  • alkaline
  • An alkaline earth metal , calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. (wikipedia.org)
  • Calcium is considered to be an alkaline earth metal, along with these heavier elements and the lighter beryllium and magnesium. (wikipedia.org)
  • Nevertheless, there are significant differences in chemical and physical properties between beryllium and magnesium (which behave more like aluminium and zinc respectively and have some of the weaker metallic character of the post-transition metals) and the group members from calcium onwards, which traditionally led to "alkaline earth metal" only applying to the latter group. (wikipedia.org)
  • The chemistry of calcium is that of a typical heavy alkaline earth metal. (wikipedia.org)
  • lime
  • It is a colorless crystal or white powder and is obtained when calcium oxide (called lime or quicklime ) is mixed, or slaked with water . (wikipedia.org)
  • Calcium iodate can be produced by the anodic oxidation of calcium iodide or by passing chlorine into a hot solution of lime in which iodine has been dissolved. (wikipedia.org)
  • sulfate
  • Calcium sulfate causes permanent hardness in water. (wikipedia.org)
  • The main use of calcium sulfate is to produce plaster of Paris and stucco . (wikipedia.org)
  • These applications exploit the fact that calcium sulfate which has been powdered and calcined forms a moldable paste upon hydration and hardens as crystalline calcium sulfate dihydrate. (wikipedia.org)
  • The impure acid from various sources was converted to calcium lactate, purified by crystallization, and then converted back to acid by treatment with sulfuric acid, which precipitated the calcium as calcium sulfate. (wikipedia.org)
  • carbide
  • During the 1920s and 1930s, Charles Kingsford Smith used separate buoyant canisters of calcium carbide and calcium phosphide as naval flares lasting up to ten minutes. (wikipedia.org)
  • Calcium phosphide is a common impurity in calcium carbide , which may cause the resulting phosphine-contaminated acetylene to ignite spontaneously. (wikipedia.org)
  • It may also be prepared by reacting liquid hydrocyanic acid with calcium carbide. (wikipedia.org)
  • bone
  • Bones grow rapidly during adolescence, and teens need enough calcium to build strong bones and fight bone loss later in life. (kidshealth.org)
  • Bone calcium begins to decrease in young adulthood and people gradually lose bone density as they age - particularly women. (kidshealth.org)
  • if there is too little absorbed or ingested, or if there is excess loss through the kidney or gut, calcium is taken from bone to maintain blood concentrations. (labtestsonline.org)
  • In addition to its widely known role in bone structure, calcium is used to help control muscle and nerve function, as well as to manage acid/base balance in our blood stream. (whfoods.com)
  • From this very simple description, you can see how calcium-rich foods can play a role in many aspects of your health that extend far beyond the specific area of bone health. (whfoods.com)
  • While the most common problem related to calcium metabolism is undoubtedly bone loss from getting too little calcium, there can be problems when intake of this nutrient gets too high as well. (whfoods.com)
  • But if we do more borrowing from than replenishing to our calcium stores, bone can become dangerously weak. (whfoods.com)
  • salts
  • Hypothetical univalent salts of calcium would be stable with respect to their elements, but not to disproportionation to the divalent salts and calcium metal, because the enthalpy of formation of MX 2 is much higher than those of the hypothetical MX. (wikipedia.org)
  • dissolves
  • The carbon dioxide lowers the pH by producing a solution high in carbonic acid , and dissolves calcium. (wikipedia.org)
  • The pH control is connected to a probe in the reactor and adjusts the rate at which the calcium media dissolves. (wikipedia.org)
  • intracellular
  • The PMCA and the sodium calcium exchanger (NCX) are together the main regulators of intracellular Ca2+ concentrations. (wikipedia.org)
  • Calcium pumps play a crucial role in proper cell signalling by keeping the intracellular calcium concentration roughly 10,000 times lower than the extracellular concentration. (wikipedia.org)
  • atoms
  • The Ca2+ centers have high coordination numbers, being bonded to the sulfite oxygen atoms and the water, giving calcium a coordination number of eight. (wikipedia.org)
  • It can be found in stars as a gas formed when calcium atoms are present with hydrogen atoms. (wikipedia.org)
  • reactive
  • In bulk, calcium is less reactive: it quickly forms a hydration coating in moist air, but below 30% relative humidity it may be stored indefinitely at room temperature. (wikipedia.org)
  • broccoli
  • You'll also find calcium in broccoli and dark green, leafy vegetables (especially collard and turnip greens, kale, and bok choy). (kidshealth.org)
  • alloy
  • still, in small quantities it is often used as an alloying component in steelmaking, and sometimes, as a calcium-lead alloy, in making automotive batteries. (wikipedia.org)
  • form
  • Excess calcium can deposit in places where it doesn't belong, including blood vessels and the kidneys (in the form of kidney stones). (whfoods.com)
  • Calcium cyanide hydrolyzes readily to form hydrogen cyanide gas. (wikipedia.org)
  • The high temperature form α- is monoclinic, with 8 coordinate calcium, the lower temperature form β- is tetragonal, with calcium in four different coordination environments, 2 that are 7 coordinate, one eight and one 9. (wikipedia.org)
  • The lactate ion is chiral, with two enantiomers, D (−,R) and L (+,S). The L isomer is the one normally synthesized and metabolized by living organisms, but some bacteria can produce the D form or convert the L to D. Thus calcium lactate also has D and L isomers, where all anions are of the same type. (wikipedia.org)
  • milk
  • Make smoothies with fresh fruit and low-fat milk or calcium-fortified soy or almond milk. (kidshealth.org)
  • If your child has lactose intolerance , a milk allergy , or eats a vegan diet, talk to your health care provider about calcium and vitamin D. (kidshealth.org)
  • Calcium caseinate is a protein produced from casein in skim and sometimes 1% milk. (wikipedia.org)
  • In the early 20th century, oral administration of calcium lactate dissolved in water (but not in milk or tablets) was found to be effective in prevention of tetany in humans and dogs with parathyroid insufficiency or who underwent parathyroidectomy. (wikipedia.org)
  • dietary
  • Looking for ways to up your dietary calcium intake? (kidshealth.org)
  • There is still some debate about how much of a problem this is for the average adult, but at this time, most nutrition experts agree that excess dietary calcium is very unlikely, and probably the result of a diet that is largely dependent upon dairy foods. (whfoods.com)
  • When our dietary calcium levels are too low, we pull calcium from the bones to keep the blood levels close to constant. (whfoods.com)
  • bones
  • It is speculated that calcium phosphide-made by boiling bones in urine, within a closed vessel-was an ingredient of some ancient Greek fire formulas. (wikipedia.org)
  • Calcium is needed for blood clotting and is crucial for the formation, density, and maintenance of bones. (labtestsonline.org)
  • About 99% of calcium is found complexed in the bones, while the remaining 1% circulates in the blood. (labtestsonline.org)
  • At any given time, about 99% of our total body calcium stores are found in bones and teeth. (whfoods.com)
  • membrane
  • Calcium pumps are a family of ion transporters found in the cell membrane of all animal cells. (wikipedia.org)
  • They are responsible for the active transport of calcium out of the cell for the maintenance of the steep Ca2+ electrochemical gradient across the cell membrane. (wikipedia.org)
  • Molecular
  • Calcium monohydride is the first molecular gas that was cooled by a cold buffer gas and then trapped by a magnetic field. (wikipedia.org)