News tagged with free radicals
Academic researchers have found that breathing motor vehicle emissions triggers a change in high-density lipoprotein (HDL) cholesterol, altering its cardiovascular protective qualities so that it actually contributes to clogged ...
Cardiology May 15, 2013 | 4 / 5 (4) | 0 |
(Medical Xpress)—Eating an apple a day might in fact help keep the cardiologist away, new research suggests.
Health Oct 02, 2012 | 5 / 5 (9) | 3 |
Researchers at Newcastle University have revealed the mechanism by which neurons, the nerve cells in the brain and other parts of the body, age. The research, published today in Aging Cell, opens up new avenues of understanding ...
Neuroscience Sep 12, 2012 | 4.9 / 5 (9) | 0 |
In an experiment on rats, European researchers have proved that eating strawberries reduces the harm that alcohol can cause to the stomach mucous membrane. Published in the open access journal Plos One, the st ...
Other Oct 25, 2011 | 4.4 / 5 (21) | 2
Obesity is growing at alarming rates worldwide, and the biggest culprit is overeating. In a study of brain circuits that control hunger and satiety, Yale School of Medicine researchers have found that molecular ...
Medical research Aug 28, 2011 | 4.9 / 5 (7) | 0 |
Conditions like atherosclerosis and age-related macular degeneration (AMD) -- the most common cause of blindness among the elderly in western societies -- are strongly linked to increased oxidative stress, ...
Medical research Oct 05, 2011 | 5 / 5 (2) | 0 |
It's rubbed on the skin to reduce signs of aging and consumed by athletes to improve endurance but scientists now have the first evidence of one of vitamin E's normal body functions.
Medical research Dec 20, 2011 | 4.8 / 5 (16) | 4 |
Twenty-five years ago the term "antioxidant" was new to the public. Today it's big business, with sales of products making antioxidant-related claims reaching $65 billion in the U.S. in 2011.
Health Sep 25, 2012 | not rated yet | 1 |
Alcohol consumption affects the brain in multiple ways, ranging from acute changes in behavior to permanent molecular and functional alterations. The general consensus is that in the brain, alcohol targets mainly neurons. ...
Neuroscience Mar 18, 2013 | 3 / 5 (1) | 0
(Medical Xpress)—Taking enough omega-3 fatty acid supplements to change the balance of oils in the diet could slow a key biological process linked to aging, new research suggests.
Health Oct 01, 2012 | 5 / 5 (2) | 0 |
Levels of the protein appoptosin in the brain skyrocket in Alzheimer's disease and traumatic brain injury. Appoptosin is known for helping the body make heme, the molecule that carries iron in the blood. In a study published ...
Neuroscience Nov 09, 2012 | 5 / 5 (1) | 1 |
Professor David Rollo and a group of researchers at McMaster may have found a "silver bullet" when it comes to slowing the aging of the brain.
Medical research Jan 04, 2012 | 4.3 / 5 (7) | 2 |
Using two different compounds they developed, scientists from the Florida campus of The Scripps Research Institute (TSRI) have been able to show in animal models that inhibiting a specific enzyme protects heart cells and ...
Cardiology Feb 07, 2013 | 4 / 5 (1) | 0 |
Genetics and demographics likely put you at risk for salt-sensitive hypertension, and scientists are looking for a way to protect you.
Medical research Feb 26, 2013 | 4.5 / 5 (2) | 0 |
Women who abruptly and prematurely lose estrogen from surgical menopause have a two-fold increase in cognitive decline and dementia.
Neuroscience Mar 28, 2013 | 3 / 5 (1) | 0
In chemistry, radicals (often referred to as free radicals) are atoms, molecules, or ions with unpaired electrons on an otherwise open shell configuration. These unpaired electrons are usually highly reactive, so radicals are likely to take part in chemical reactions. Radicals play an important role in combustion, atmospheric chemistry, polymerization, plasma chemistry, biochemistry, and many other chemical processes, including human physiology. For example, superoxide and nitric oxide regulate many biological processes, such as controlling vascular tone. "Radical" and "free radical" are frequently used interchangeably, although a radical may be trapped within a solvent cage or be otherwise bound. The first organic free radical identified was triphenylmethyl radical, by Moses Gomberg in 1900 at the University of Michigan.
Historically, the term radical has also been used for bound parts of the molecule, especially when they remain unchanged in reactions. These are now called functional groups. For example, methyl alcohol was described as consisting of a methyl "radical" and a hydroxyl "radical". Neither are radicals in the modern chemical sense, as they are permanently bound to each other, and have no unpaired, reactive electrons. They can, however, be observed as radicals in mass spectrometry after breaking down the substance with a hail of energetic electrons.
For more information about Radical (chemistry), read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.