Meaning of "free radical" in the English dictionary

PRONUNCIATION OF FREE RADICAL

free radical

GRAMMATICAL CATEGORY OF FREE RADICAL

Free radical is a noun.

A noun is a type of word the meaning of which determines reality. Nouns provide the names for all things: people, objects, sensations, feelings, etc.

WHAT DOES FREE RADICAL MEAN IN ENGLISH?

Radical (chemistry)

In chemistry, a radical is an atom, molecule, or ion that has unpaired valence electrons or an open electron shell, and therefore may be seen as having one or more "dangling" covalent bonds. With some exceptions, these "dangling" bonds make free radicals highly chemically reactive towards other substances, or even towards themselves: their molecules will often spontaneously dimerize or polymerize if they come in contact with each other. Most radicals are reasonably stable only at very low concentrations in inert media or in a vacuum. A notable example of a free radical is the hydroxyl radical, a molecule that is one hydrogen atom short of a water molecule and thus has one bond "dangling" from the oxygen. Two other examples are the carbene molecule, which has two dangling bonds; and the superoxide anion, the oxygen molecule O 2 with one extra electron, which has one dangling bond. On the other hand, the hydroxyl anion, the oxide anion and the carbenium cation are not radicals, since the bonds that may appear to be dangling are in fact resolved by the addition or removal of electrons.

TRANSLATION OF FREE RADICAL

Find out the translation of free radical to 25 languages with our English multilingual translator.

The translations of free radical from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «free radical» in English.

• Translator English - Chinese: 自由基
• Translator English - Spanish: radicales libres
• English: free radical
• Translator English - Hindi: कट्टरपंथी मुक्त
• Translator English - Arabic: الجذور الحرة
• Translator English - Russian: свободный радикал
• Translator English - Portuguese: radical livre
• Translator English - Bengali: ভিত্তিগত বিনামূল্যে
• Translator English - French: de radicaux libres
• Translator English - Malay: Radikal bebas
• Translator English - German: Radikal
• Translator English - Japanese: 遊離基
• Translator English - Korean: 자유 라디칼
• Translator English - Javanese: Radikal bebas
• Translator English - Vietnamese: gốc tự do
• Translator English - Tamil: இலவச தீவிரம்
• Translator English - Marathi: मुक्त मूलगामी
• Translator English - Turkish: serbest radikal
• Translator English - Italian: radicale libero
• Translator English - Polish: wolnych rodników
• Translator English - Ukrainian: вільний радикал
• Translator English - Romanian: radicali liberi
• Translator English - Greek: ελεύθερων ριζών
• Translator English - Afrikaans: vrye radikale
• Translator English - Swedish: fri radikal
• Translator English - Norwegian: frie radikaler

10 ENGLISH BOOKS RELATING TO «FREE RADICAL»

Discover the use of free radical in the following bibliographical selection. Books relating to free radical and brief extracts from same to provide context of its use in English literature.

Free Radical Damage and its Control

This book provides a comprehensive treatise on the chemical and biochemical consequences of damaging free radical reactions, the implications for the pathogenesis of disease and how this might be controlled endogenously and by radical ...

C.A. Rice-Evans, R.H. Burdon, 1994

Free Radical Toxicology

The book focuses on target organ toxicity, and the concluding section offers an overview of the evidence implicating free radicals in the aetiology of various chemical toxicities, challenging the possibility of misguided use of biomarkers ...

Kendall B Wallace, 1997

Techniques in Free Radical Research

Techniques in Free Radical Research assembles and critically assesses the most relevant and reliable experimental approaches used towards the measurement of radicals and radical-mediated damage in chemical systems, in cells and in tissues ...

A.T. Diplock, M.C.R. Symons, C.A. Rice-Evans, 1991

Handbook of Free Radical Initiators

The Handbook of Free Radical Initiators presents an up-to-date account of the physicochemical data on radical initiators and reactions of radical generation.

E. T. Denisov, T. G. Denisova, T. S. Pokidova, 2005

Free Radical

In 2001, Tony Benn, one of the most influential socialist politicians in Europe, retired from the British House of Commons after almost 50 years in politics, to 'devote more time to politics'.

Tony Benn, 2004

Free-Radical-Induced DNA Damage and Its Repair: A Chemical ...

Both chemists and molecular biologists will find this an invaluable reference work for the study of free radical induced DNA damage and its repair.

Clemens Sonntag, 2006

Advanced Free Radical Reactions for Organic Synthesis

The book usefully provides experimental details for the most important reactions as well as numerous references to the original literature.

Hideo Togo, 2004

Immunopharmacology of Free Radical Species

This volume deals with various basic mechanisms of free radical processes and injury. The emphasis in each case is on potential therapeutic strategies developing fromthis new knowledge.

‎1995

Handbook of Radical Polymerization

Chapters written by internationally acclaimed experts in their respective fields include: * Theory of Radical Reactions * The Kinetics of Free Radical Polymerization * Industrial Applications and Processes * Nitroxide Mediated Living ...

Krzysztof Matyjaszewski, Thomas P. Davis, 2002

Free-Radical Retrograde-Precipitation Polymerization ...

The book pertains to unique phenomenological features of a potentially runaway polymerization reaction process that is apparently brought under control through a mass and energy confining mechanism.

Gerard Caneba, 2010

10 NEWS ITEMS WHICH INCLUDE THE TERM «FREE RADICAL»

Find out what the national and international press are talking about and how the term free radical is used in the context of the following news items.

10 Reasons to Love the Herb St. John's Wort

Because free radical damage is involved in aging and many diseases, these findings suggest that St. John's Wort may have many other ... «Care2.com, Jul 15»

Health: Nutrients to reduce heart disease risk

While there is debate whether homocysteine is a primary or a supporting risk factor we know that homocysteine increases free radical activity in ... «New Zealand Herald, Jul 15»

Natural News: Wisdom of Nature Welcomes BritEyes

... integrity of blood vessels, promote healthy circulation and even help to prevent free radical damage to the delicate structures within the eyes. «PR.com, Jul 15»

We all get sunburned - here's how to deal with it

"Exposure to the sun's rays can increase free radical damage, contributing to the breakdown of collagen and elastin (the structures that keep ... «Business Insider, Jul 15»

The New Superfruit You've Never Heard of But Need to Try

One in particular, chlorogenic acid, is one of the most potent free radical scavengers found in plant tissues. Serving size: one cup cooked ... «TIME, Jul 15»

Mukti Antioxidant Facial Serum

Strengthens capillaries and reduces free radical damage, protecting the skin from breakdown and aging." Wild Roselia (Hibiscus) extract: ... «Truth In Aging, Jul 15»

Therapeutic benefit of melatonin in refractory central serous …

Protective effects of melatonin in experimental free radical-related ocular diseases. J Pineal Res 2006; 40: 101–109. | Article | PubMed |; Alio JL ... «Nature.com, Jul 15»

Dr. Jen's surprising news about sunscreen

You put sunscreen on, to avoid free radical generation from the sun. But if you're putting chemical sunscreens on, you're actually doubling up ... «KING5.com, Jul 15»

MitoQ Protects Donor Transplant Hearts From Damage During Storage

Researchers have found that the reperfusion of blood into an ischemic heart can lead to free radical production in the mitochondria. «Cardiovascular Disease News, Jul 15»

Healing, stress reducing, immune-boosting power of tea

These polyphenols are antioxidants, and protect the body's cells from free radical damage, help prevent premature blood clotting, and boost the ... «Tryon Daily Bulletin, Jul 15»