How To Use Free radical In A Sentence
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However, the products obtained from reactions with halides can be rather surprising - ie the dithiadiazole can trap free radical intermediates.
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Free radicals are very difficult to study due to their short life-times - measured in millionth's of a second.
Nobel Prize in Chemistry 1971 - Presentation Speech
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oxygen free radicals are normally removed in our bodies by the superoxide dismutase enzymes
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Oxidative stress is the term given to the destructive process caused by free radical molecules.
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It is produced through a free radical polymerization reaction of styrene monomers.
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Cigarette smoke contains a range of xenobiotics, including oxidants and free radicals that can increase lipid peroxidation.
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Fruits and vegetables are full of antioxidants that disable free radicals and minimize inflammation.
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in the body free radicals are high-energy particles that ricochet wildly and damage cells
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Metallocenes are useful in industrial chemistry as reducing agents, anti-knock agents for internal combustion engine fuels, absorbers of ultraviolet light, and free radical scavengers.
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Nitric oxide is a free radical that promotes infection resistance and blood vessel dilation.
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Efficiency: Relieve damages caused by free radical, replenish water into skin with obvious anti-oxidation function.
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He says by creating drugs to replicate the effect, it will take longer for the accumulative damage caused by free radicals to occur.
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It's true that an antioxidant becomes a free radical after it donates an electron to quench another free radical.
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It has been discovered that the vitamin has the ability to rid your body of the free radicals that sometimes prevent oxygen being pumped around your limbs.
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This was sufficient to produce an overload of blood lipids, to damage the endothelial cells, to produce free radicals and to affect the dilation and contraction of blood vessels.
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The deleterious effects of the free radicals are kept under check by a delicate balance between the rate of their production and elimination by the different antioxidant systems.
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Niacinamide inhibits free radical formation and facilitates beta-cell regeneration in vivo and in vitro.
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Eliminate free radical, improve immunity, optimize internal secretion, resist lipofuscin and keep nutrient balance.
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Free radicals react destructively with many cellular components causing cell damage and leading to many diseases from cataract to cancer, heart disease to dementia.
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Number one is the build up of toxins such as acetaldehyde and free radicals, as your liver struggles to cope with metabolizing large amounts of alcohol.
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Ultra-violet rays and the free radicals age the skin more quickly reducing its elasticity and creating wrinkles.
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This additional damage could be coming either from the free radicals present in cigarette smoke or from free radicals produced in the body.
The Antioxidant Health Plan
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Carotenoids help build vitamins and are strong antioxidants - chemicals that help animals detoxify harmful molecules called free radicals.
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Oxygen free radicals stimulate osteoclasts, the cells that resorb or break down bone.
Forever Young
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Left to their own devices, these free radicals cause tissue damage.
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It is caused by charged particles known as free radicals and can be counteracted by antioxidants including vitamin C.
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To measure the efficacy of sunscreens, researchers used electron spin resonance spectroscopy to measure free radical production induced by UVA in the skin of white people.
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A 2008 paper titled "Hormesis in Aging" by researchers from the Laboratory of Cellular Aging, Department of Molecular Biology, University of Aarhus in Denmark concluded that "single or multiple exposure to low doses of otherwise harmful agents, such as irradiation, food limitation, heat stress, hypergravity, reactive oxygen species and other free radicals have a variety of anti-aging and longevity-extending hormetic effects.
The Full Feed from HuffingtonPost.com
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Betacarotene helps to quench the chemical fires started by free radicals, and helps to protect the skin from sunburn.
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But I'm beginning now to think those cofactors may act indirectly by inducing mutations – oxidative stress, free radicals which can induce mutations in the virus.
Luc Montagnier - Interview
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Free radicals are thought responsible for making cholesterol harmful to arteries and the heart and for impairing memory and movement with age.
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Most of the oxidants in cigarette smoke are not ordinary atoms or molecules, but ‘free radicals’.
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They're also rich in antioxidants that help eliminate free radicals and reduce inflammation in the skin.
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Some vitamins and other substances work as antioxidants by fighting the oxidation caused by free radicals.
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Low levels of natural antioxidants in pancreatitis indicate their increased utilization as scavengers of free radicals.
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We know that free radicals can damage any tissue in the body.
The Antioxidant Health Plan
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Vitamin A works as an antioxidant, removing free radicals from the skin.
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Free radicals careen through your bloodstream and indiscriminately plunder unpaired electrons from unsuspecting molecules.
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Free radical scavengers, however, do not completely prevent the loss of diaphragmatic force associated with delayed injury, indicating that other mechanisms are involved.
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NO, with its unpaired electron, is a free radical capable of undergoing various oxidative and reductive reactions, whereas CO is relatively inert.
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On contact with the chemoattractant they form oxygen free radical species and there is release of lysosomal enzymes after phagocytosis.
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Melatonin also scavenges free radicals, and having low levels of this hormone has been linked to Alzheimer's disease.
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Two hot areas: products for dieters and antioxidants, which are thought to neutralize so-called free radicals that can damage cells.
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The metallic part of the siccative accelerates absorption of atmospheric oxygen, catalyses the formation of free radicals, and the binder reacts - dries more rapidly.
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Or...as a Free Radical, you can make, hack, create, innovate, be productive and multiplicate to the only thing that really matters for the future of society, and that is rolling the ball of progress up that ever steeper slope.
Andy Kessler: Want to be a Free Radical? Here's How
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Unlike fish oil, krill oil contains higher levels of a potent antioxidant called astaxanthin, which in addition to its ability to fight free radicals and oxidative stress, also helps make krill oil less perishable than fish oil.
The Debate Over Men And Omega-3
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Your body never produces enough antioxidants, though, to stop all of the free radicals.
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Whenever the antioxidants are present, antioxidant enzyme activity and scavengers of the free radical will be induced to prevent the oxidative damage.
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The reaction is started by an initiator, usually a free radical R, that bonds to one of the carbon atoms of ethylene.
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Similarly, a study from Turkey determined that activity in rheumatic joints produced high levels of both free radicals and inflammatory substances.
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Chronic stress also unleashes an army of free radicals that damages body and brain cells.
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One can see features of the system that might be important, the variable valency of cobalt and the possibility of changes within the corrin nucleus, the fact that the cobalt to carbon bond readily breaks to give rise to free radicals 21.
Nobel Lecture The X-Ray Analysis Of Complicated Molecules
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The steps include aerobic exercise, less fatty food, learning new skills and avoiding damaging free radicals.
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The free radicals and reactive species produced by these reactions are highly cytotoxic.
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These antioxidants and enzymes remove or inactivate the free radicals.
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ObjectiveTo investigate the anti - oxide free radical effect of XinAn Granule ( XAG ).
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Free radicals have been implicated in cancer and many other serious diseases.
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Fruits and vegetables rich in antioxidants can help scavenge free radicals generated by stress.
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Methane can also be halogenated by free radical substitution.
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Mutated, freely-multiplying cells are caused by peroxidized fats, by free radicals in the body, by radiation (there has always been background radiation on Earth), by chance mutation.
How and When to Be Your Own Doctor
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Iron plays a very important part in the reactions in our cells that produce damaging free radicals, which glom onto cell membranes and DNA, and may translate into aging the cell.
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Cigarette smoke contains large quantities of free radicals, many known to oxidise LDL cholesterol, making them more likely to be deposited on the walls of the blood vessels.
Gender Disparities in the Battle Against Heart-Related Deaths « Gender Across Borders
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Naringin, a bioflavonoid predominant in grapefruit and other citrus fruits, has been found to scavenge free radicals, therefore it may also reduce radiation-induced damage.
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This additional damage could be coming either from the free radicals present in cigarette smoke or from free radicals produced in the body.
The Antioxidant Health Plan
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It is already well established that ultraviolet radiation produces free radicals in tissue.
The Antioxidant Health Plan
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Further studies in vitro and in vivo were interpreted as showing ß-carotene to act as an anticarcinogen, whereas its oxidation product acted as a carcinogen, possibly related to the instability of the beta-carotene molecule in the free radical-rich environment in the lungs of cigarette smokers.
Innovations-report
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Sweet wild blueberries are bursting with antioxidants, which mop up nasty free radicals.
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But continuous gorging on food triggers a decrease in free radicals.
The Sun
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Both of these cancers produce high levels of free radicals that can be suppressed by feeding the mice supplements of antioxidants, either vitamin C or N-acetylcysteine (NAC).
How Vitamin C Stops the Big ‘C’ | Impact Lab
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They might also influence free radicals: atoms with unpaired electrons that are highly reactive and play a part in all sorts of biochemical processes.
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The basic assumption is that the extent to which the post-anoxic cells can detoxify by ‘scavenging’ free radicals using enzymic and chemical means will determine the level of injury.
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Now the free radicals start to oxidise this cholesterol, and that leads ultimately to inflammation.
Inflammation and diet | The Blog of Michael R. Eades, M.D.
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His first problem involved the study, by flow techniques, of free radicals produced in gaseous photochemical reactions.
George Porter - Biography
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Adding spermidine suppressed various processes associated with ageing, as well as reducing free radicals and increasing lifespan.
Telegraph.co.uk: news business sport the Daily Telegraph newspaper Sunday Telegraph
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The scientist also believes that antioxidants taken supplementally will combat the negative effects of exercise by protecting cells and tissues against destructive free radicals.
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Artery-clogging cholesterol, alcohol and carcinogenic free radicals cause cellular mayhem in the aftermath of too many bibulous feasts.
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Since free radicals play an important role in causing the arterial disease that brings about this narrowing, we have one obvious line of approach.
The Antioxidant Health Plan
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When cinnamic aldehyde, a weak electrophile, acts upon NRF2, this protective transcription factor is activated, just as it is when a cell is under attack by free radicals.
Forever Young
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These free radicals are known to have a role in causing cancer as well as other harmful effects.
Times, Sunday Times
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In the free radical polymerization of ethylene to form polyethylene, a small amount of a peroxide is added to a large volume of ethylene.
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The raw egg is full of cysteine which helps the body break down the free radicals which build up in the liver and it's best to swallow it in a oner.
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These free radicals are known to have a role in causing cancer as well as other harmful effects.
Times, Sunday Times
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One of the commonest forms of exposure to free radicals is atmospheric pollution.
The Family Nutrition Workbook
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Pro - Nogenol: Cell protector; Helps to transmit Vitamin C through the body; Free radical scavenger.
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The activity technology is proved by medical research that the superoxide dismutase (SOD) can eliminate excessive free radicals in the human body, and delay senility and the appearance of age pigment.
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We accept the fact that agents such as free radicals can influence cell function.
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The thyroid uses glutathione, a combination of three amino acids (glycine, glutamine, and cysteine), protectively as an antioxidant or free radical quencher and as a cofactor that makes it possible for one of its most important enzymes (5'-deiodinase) to work (6).
Dr. James P. Blumenthal: Healthy Tips For Protecting Your Body From Radiation And Nuclear Fallout
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Free radicals are thought to be responsible for helping to cause premature ageing, heart disease and cancer.
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Bickford speculates it's the antioxidants that help inhibit free radicals and so reduce the cumulative effects of life on the aging rat brain.
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Leaves skin cleansed and soft and protects against free radicals.
Times, Sunday Times
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Substitution reactions of organic compounds can also involve free radicals.
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The formation of conjugated dienes occurs when free radicals attack the hydrogens of methylene groups separating double bonds and leading to a rearrangement of the bonds.
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In free radical polymerization, monomers can add to each other without formation of a small molecule.
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All three have been shown to be active in a variety of yeast-based screens and there is some evidence that urethane and thiourea may induce free radicals in yeast cells.
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If left unchecked, free radicals cause nasty damage to the body's cell membranes and DNA.
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Functions include detoxification of free radicals and peroxides, regulation of cell growth and protein function, and maintenance of immune function.
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We also developed a means of producing fragments of polyatomic molecules (free radicals such as benzyl and methoxy) by directing a pulsed laser into a specially designed pulsed supersonic nozzle, and studying these cooled in the supersonic beam.
Richard E. Smalley - Autobiography
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Produced in the cytosol, the watery portion of the cell, this glutathione must be transferred into the mitochondria to defend against the free radicals, also known as reactive oxygen species, or ROSs.
Forever Young
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Oxygen use produces oxygen - free radicals that can destroy schistosoma an organism.
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Catalase acts as a free radical scavenger by neutralizing superoxide radical anion and hydrogen peroxide.
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Free radical damage can also wrinkle your skin and weaken your heart.
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A 2007 University of Texas study review concluded that not only does melatonin detoxify harmful, cancer-causing free radicals, but in doing so it actually creates more antioxidants.
The Cost Of Lost Shut-Eye
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When the toxin is exposed to light, it reacts with oxygen to produce superoxide anions and singlet oxygen, which are also known as free radicals.
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It is important to note that nitrated proteins are not the same as free radicals.
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The research and development of anti free radical pharmacon will make a new way to prevent and heal altitude diseases.
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Leaves skin cleansed and soft and protects against free radicals.
Times, Sunday Times
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Objective To study the protective action of rearm by anti - oxygen free radical to the grafted liver.
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They get passed around from vitamin C to vitamin E to lipoic acid and then finally to glutathione which cools off the free radicals and recycles other antioxidants.
Mark Hyman, MD: Glutathione: The Mother of All Antioxidants
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Free radicals may also play a part in producing organic compounds with metallic properties.
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Free radicals like ROS, RNS and lipid peroxidation products such as Malondialdehyde have been shown to induce pressure of c-fos and c-jun oncoproteins.
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CoffeeBerry is made from the coffee plant Coffea arabica, which is grown in tropical regions and harvested when sub-ripe, and is a super antioxidant that protects the skin from free radicals.
Secret Ingredients In Skincare Products
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Oxygen free radicals in root cells would be formed in the process of root respiration in the mitochondria and the oxidation of secondary metabolites such as soluble phenols.
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Metallocenes are useful in industrial chemistry as reducing agents, anti-knock agents for internal combustion engine fuels, absorbers of ultraviolet light, and free radical scavengers.
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Free radicals are the unstable, highly reactive and potentially harmful molecules formed in the body by exposure to sunlight, cigarette smoke and environmental pollutants.
PCOS DIET BOOK: How you can use the nutritional approach to deal with polycystic ovary syndrome
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Once NFκB is activated in the cytosol (watery portion of the cell) during oxidative stress (excess free radicals), it translocates to the nucleus, where it activates gene expression for the production of pro-inflammatory proteins called cytokines.
Forever Young
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The formation of conjugated dienes occurs when free radicals attack the hydrogens of methylene groups separating double bonds and leading to a rearrangement of the bonds.
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Antioxidants are molecules which can safely interact with free radicals and terminate the chain reaction before vital molecules are damaged, and green tea has EGCG as an anti-oxidant which is found to be 100 times more effective than vitamin C, 25 times more effective than Vitamin E and twice as powerful as its peers!
Archive 2007-10-01
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It appears as a result of the photosensitized formation of free radicals, singlet oxygen, photoproducts or other intermediates.
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It also enhances the antioxidant activity of vitamin E, a fat-soluble free radical scavenger.
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These compounds are photolytic; the break down in the presence of UV light to form free radicals.
Archive 2007-09-01
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Since free radicals play an important role in causing the arterial disease that brings about this narrowing, we have one obvious line of approach.
The Antioxidant Health Plan
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Isoflavone Aglycone ( phytoestrogens ) can activate the anti - oxidization system in the body to eliminate free radicals.
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Certain vitamins like tocopherol and ascorbic acid are also suggested to have a strong free radical scavenging properties.
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In the free radical polymerization of ethylene to form polyethylene, a small amount of a peroxide is added to a large volume of ethylene.
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Cerebral oligaemia episode triggers free radical formation and late cognitive deficiencies.
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We also developed a means of producing fragments of polyatomic molecules (free radicals such as benzyl and methoxy) by directing a pulsed laser into a specially designed pulsed supersonic nozzle, and studying these cooled in the supersonic beam.
Richard E. Smalley - Autobiography
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A series of free radicals and the neutral molecules were identified by measuring of photoionization mass spectrometry combined with photoionization efficiency spectra.
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Pumpkins are high in carotenoids, which neutralize free radicals, and lutein, which is good for your baby blue eyes.
Jodi Lipper and Cerina Vincent: Have Your Candy And Eat It, Too
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Vitamin A supports healthy mucous membranes while vitamin C and E act synergistically to combat free radicals commonly created during infection.
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The free radicals have the additional benefit of killing bacteria, viruses and spores.
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Stilbene glycoside; Vascular dementia; Behavioral; Free radical metabolism.
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Nigel watched the list of molecules and free radicals stack up: ethanol, cyanoacetylene, carbon monoxide, ammonia, methane, water-and realized that as far as the universe was concerned, this was where chemistry occurred.
Across The Sea Of Suns
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Because free radicals are highly reactive, they are capable of damaging the body.
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We know that free radicals can damage any tissue in the body.
The Antioxidant Health Plan
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Addition polymerization reactions use free radical monomers to produce polymers.
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Synthetic polymers such as polyethylene and polypropylene are produced by free radical addition reactions.
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Unlike normal cooking, when food is nuked numerous chemical bonds are ruptured, leaving behind a trail of free radicals, ions, and other radiolytic byproducts.
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Vitamin E helps immune cells multiply, and as an antioxidant it fights damaging free radicals.
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free radicals are very reactive
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But continuous gorging on food triggers a decrease in free radicals.
The Sun
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The free radical of the ethyl group is known to exist as an entity in its own right.
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It is already well established that ultraviolet radiation produces free radicals in tissue.
The Antioxidant Health Plan
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And, as we have seen, removing electrons from atoms is exactly what free radicals are particularly good at doing.
The Antioxidant Health Plan
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The body uses free radical molecules for intracellular and intercellular signalling.
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In the process of decomposing, H2O2 releases free radicals - highly reactive intermediates that oxidize other molecules by removing electrons or hydrogen atoms from them.
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This major study teaches that theoretical ideas about free radicals are not always borne out in practice.
The Antioxidant Health Plan
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In 1880 the first cyclic sulphur-nitrogen free radical - - was prepared as a deep green powder with a metallic lustre.
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Be careful of any fish oil that smells/tastes rancid and it goes bad very fast and then produces free radicals up the wazoo, which is very counterproductive if you're taking these things for your health!
Archive 2006-07-01
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One of the most significant is the harmful biochemical process caused by "free radicals".
The A-Z of Beauty Treatment
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This major study teaches that theoretical ideas about free radicals are not always borne out in practice.
The Antioxidant Health Plan
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They are compounds that scavenge free radicals of oxygen, unstable molecules given off by the body's many metabolic actions.
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At the root of sunburn are damaging molecules, free radicals that increase when the skin gets too much sun.
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14 Chiang et al, "In vitro antiviral activities of Caesalpinia pulcherrima and its related flavonoids," Journal of Antimicrobial Chemotherapy 52: 194-198 (2003) 15 Ferraresi et al, "Essential requirement of reduced glutathione (GSH) for the anti-oxidant effect of the flavonoid quercetin," Free Radical Research 39 (11): 1249-1258 (2005) 16 Myhrstad et al, "Flavonoids increase the intracellular glutathione level by transactivation of the gamma-glutamylcysteine synthetase catalytical subunit promoter," Free Radical Biology
To The Point News Syndicated
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The major function of vitamin E is to act as a natural antioxidant by scavenging free radicals and molecular oxygen.
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This causes scission of an initiator molecule which produces free radicals in the presence of an aliphatic amine accelerator.
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These breakdown products can become toxic to the membrane due to excess levels of free radicals, lipid peroxides, and arachidonic acid and its metabolites such as leukotrienes.
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Variants of two genes were associated with increased risk of kidney cancer: nitric oxide synthase 2A (NOS2A), which increases levels of nitric oxide, a chemical that promotes free radical damage to cells; and prostaglandin-endoperoxide 2 (PTGS2), which produces prostaglandins, compounds that cause inflammation.
Medlogs - Recent stories
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Tomatoes are rich in antioxidants, which neutralize damaging free radicals.
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He also believes that antioxidants taken supplementally will combat the negative effects of exercise by protecting cells and tissues against destructive free radicals.
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Check out our innovative, cutting-edge products with proven results: Isotonix family and Oxygen Plus Antioxidants fighting free radical damage, and our thermogenesis line.
