noun
definition
A chemical element (symbol: I) with an atomic number of 53; one of the halogens.
definition
An antiseptic incorporating the element.
synonyms
definition
An iodide.
verb
definition
To treat with iodine.
synonyms
Examples of iodine in a Sentence
It does not liberate iodine from potassium iodide, neither does it decolorize iodine solution.
Courtois isolated the element iodine from " kelp," the burnt ashes of marine plants.
It has a strong and characteristic odour, and a hot sweetish taste, is soluble in ten parts of water, and in all proportions in alcohol, and dissolves bromine, iodine, and, in small quantities, sulphur and phosphorus, also the volatile oils, most fatty and resinous substances, guncotton, caoutchouc and certain of the vegetable alkaloids.
The industries of the town and its environs (Sandnaes, &c.) are prosperous, including factories for preserved foods, woollens and linens, lime, iodine from seaweed, and domestic commodities.
This acid may also be prepared by the electrolysis of concentrated sulphuric acid, and it is distinguishable from persulphuric acid by the fact that it immediately liberates iodine from potassium iodide.
This difference in behaviour of the three elements, chlorine, bromine and iodine, which in many respects exhibit considerable resemblance, may be explained in the following manner.
The chemical analogy of this substance to chlorine was quickly perceived, especially after its investigation by Davy and Gay Lussac. Cyanogen, a compound which in combination behaved very similarly to chlorine and iodine, was isolated in 1815 by Gay Lussac. This discovery of the first of the then-styled " compound radicals " exerted great influence on the prevailing views of chemical composition.
Unfortunately, the term normal is sometimes given to solutions which are strictly decinormal; for example, iodine, sodium thiosulphate, &c. In technical analysis, where a solution is used for one process only, it may be prepared so that I cc. is equal to.
Its power depends on the fact that it is slowly decomposed by the tissues, and free iodine given off.
Its aqueous solution gradually decomposes with evolution of oxygen, behaves as a strong oxidant, and liberates iodine from potassium iodide.
Among the principal varieties are those which contain carbolic acid and other ingredients of coal tar, salicylic acid, petroleum, borax, camphor, iodine, mercurial salts, sulphur and tannin.
Iodine is an essential component of the thyroid hormone, thyroxine, which is the master regulator of metabolism.
In many cases it acts as a reducing agent (when used in the presence of acids); thus, permanganates are reduced to manganous salts, iodates are reduced with liberation of iodine, &c., 2KMnO 4 + 550 2 + 2H 2 0 = K 2 SO 4 + 2MnSO 4 + 2H 2 SO 4; 2K103+ 550 2 + 4H 2 O =1 3 + 2KHSO 4 + 3H2S04.
Thus, in the production of hydrochloric acid from hydrogen and chlorine 22,000 calories are developed; in the production of hydrobromic acid from hydrogen and bromine, however, only 8440 caloriesare developed; and in the formation of hydriodic acid from hydrogen and iodine 6040 calories are absorbed.
With iodine compounds, iodic acid is likely to be formed, and hence the solution must be reduced with sulphurous acid before precipitation with silver nitrate.
It will only combine with hydrogen in the presence of a catalyst, but combines with many other elements directly; for example, phosphorus melts and then inflames, antimony burns in the vapour, and mercury when heated with iodine combines with it rapidly.
With chlorine it gives phosphoryl and " metaphosphoryl " chlorides, the action being accompanied with a greenish flame; bromine gives phosphorus pentabromide and pentoxide which interact to give phosphoryl and " metaphosphoryl " bromides; iodine gives phosphorus di-iodide, P 2 I 4, and pentoxide, P 2 0 5; whilst hydrochloric acid gives phosphorus trichloride and phosphorous acid, which interact to form free phosphorus, phosphoric acid and hydrochloric acid.
Therefore, the radioactive iodine builds up in the thyroid gland.
A highly polished sheet of silver-plated copper was made sensitive to light by exposing it to the fumes of iodine.
The supernatant fluid above the crystals is a saturated solution of iodine.
Grave 's disease is widely treated, where medical methods are deemed unsatisfactory, by partial thyroidectomy, or Radioactive Iodine ablation.
People with hypothyroidism or with thyrotoxicosis treated either surgically or with radioiodine would not be at risk from stable iodine.
The best chemical purifier is tincture of iodine at the rate of four drops per liter.
In order to increase the information obtained from a conventional x ray, air or contrast media (such as barium or iodine) may be used to enhance the images.
Contrast agent-Also called a contrast medium, this is usually a barium or iodine dye that is injected into the area under investigation.
As far as human nutrition is concerned, the inorganic nutrients include water, sodium, potassium, chloride, calcium, phosphate, sulfate, magnesium, iron, fluorine, copper, zinc, chromium, manganese, iodine, selenium, and molybdenum.
Toxic levels of iodine inhibit the secretion of thyroid hormone, resulting in lower levels of thyroid hormone in the bloodstream.
Goiter is usually caused by iodine deficiency.
In addition to goiter, iodine toxicity produces a brassy taste in the mouth, excessive production of saliva, and ulcers on the skin.
This skin condition has been called kelp acne because of its association with eating kelp, an ocean plant that contains high levels of iodine.
Iodine toxicity occurs fairly frequently in Japan, where people consume large amounts of seaweed.
The prognosis for treating iodine toxicity is excellent.
In the case of iodine, toxicity can be prevented by avoiding overconsumption of seaweed or kelp.
Also in rare cases, the salivary glands can become blocked, develop tumors, or swell due to the use of certain drugs, such as iodine.
The minerals that are relevant to human nutrition are water, sodium, potassium, chloride, calcium, phosphate, sulfate, magnesium, iron, copper, zinc, manganese, iodine, selenium, and molybdenum.
The best source of iodine is fish, but table salt normally has iodine added to it, and even modest amounts of salt will meet the daily iodine requirements.
Because contrast material may contain iodine, sensitivity to contrast material may occur if the child has other allergies to iodine or seafood, and CT staff should be informed if the child has such allergies.
The thyroid stores iodine that the body obtains from food, and uses this mineral to create the thyroid hormones.
Radiation. Radioactive iodine used to treat hyperthyroidism (overactive thyroid) or radiation treatments for head or neck cancers can destroy the thyroid gland.
Because the thyroid makes T4 from iodine in food, an iodine-deficient diet can cause hypothyroidism.
Radioactive iodine is often prescribed to damage cells that make thyroid hormone.
The cells need iodine to make the hormone, so they absorb any iodine found in the body.
The patient may take an iodine capsule daily for several weeks, resulting in the eventual shrinkage of the thyroid, reduced hormone production, and a return to normal blood levels.
Some patients may receive a single larger oral dose of radioactive iodine to treat the disease more quickly.
Some patients may be candidates for surgery because they were not good candidates for iodine therapy or refused iodine administration.
Iodine is required for thyroid gland function and metabolizing fats.
Iodine deficiency is a public health problem in parts of the world that have iodine-deficient soils.
Iodine is needed to make thyroid hormone, which has a variety of roles in human embryo development.
Iodine deficiency occurs when soil is iodine-poor and foods grown in the soil are correspondingly low in iodine.
An iodine intake of 0.10-0.15 mg/day is considered to be nutritionally adequate.