News tagged with sodium

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Predicting avoidable 30-day readmissions

In an international, multicenter study researchers have found that the HOSPITAL score, an acronym created to identify the variables associated with hospital readmissions, successfully predicted patients at high risk of a ...

Mar 07, 2016
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Six things that raise your blood pressure

Keeping your pressure under control can mean adding things to your life, like exercise, that help lower it. But, you may not realize that it also means avoiding things that raise your pressure. A healthy blood pressure level ...

Feb 17, 2016
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Salt and sodium intake remains high in China

Yongning Wu, Ph.D., of the China National Centre for Food Safety Risk Assessment, Beijing, China, and colleagues compared salt and sodium consumption in China in 2000 with 2009-2012. The study appears in the February 16 issue ...

Feb 16, 2016
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Aging may worsen the effects of a high-salt diet

Aging is associated with a number of changes that cause the body to function less efficiently, including the way the body controls water and sodium levels. Research has shown that as humans and animals age, they are less ...

Feb 10, 2016
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A new alternative to sodium—Fish sauce

Cooks, chefs and food manufacturers are looking for natural ways to reduce sodium in recipes in nearly every culture. A big challenge to doing that is taste. Consumers typically describe reduced-sodium foods as lacking in ...

Jan 18, 2016
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Sodium

Sodium (pronounced /ˈsoʊdiəm/) is a metallic element with a symbol Na (from Latin natrium or Arabic natrun) and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals within "group 1" (formerly known as ‘group IA’). It has only one stable isotope, 23Na.

Elemental sodium was first isolated by Sir Humphry Davy in 1806 by passing an electric current through molten sodium hydroxide. Elemental sodium does not occur naturally on Earth, but quickly oxidizes in air and is violently reactive with water, so it must be stored in an inert medium, such as a liquid hydrocarbon. The free metal is used for some chemical synthesis and heat transfer applications.

Sodium ion is soluble in water in nearly all of its compounds, and is thus present in great quantities in the Earth's oceans and other stagnant bodies of water. In these bodies it is mostly counterbalanced by the chloride ion, causing evaporated ocean water solids to consist mostly of sodium chloride, or common table salt. Sodium ion is also a component of many minerals.

Sodium is an essential element for all animal life and for some plant species. In animals, sodium ions are used in opposition to potassium ions, to allow the organism to build up an electrostatic charge on cell membranes, and thus allow transmission of nerve impulses when the charge is allowed to dissipate by a moving wave of voltage change. Sodium is thus classified as a “dietary inorganic macro-mineral” for animals. Sodium's relative rarity on land is due to its solubility in water, thus causing it to be leached into bodies of long-standing water by rainfall. Such is its relatively large requirement in animals, in contrast to its relative scarcity in many inland soils, that herbivorous land animals have developed a special taste receptor for sodium ion.

This text uses material from Wikipedia, licensed under CC BY-SA

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