Smoke from more than 200 wildfires burning across Canada has been turning skies hazy in North American cities far from the flames.
May 23, 2023
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Turmeric has been used by humans for more than 4,000 years. As well as cooking and cosmetics, it's been a staple of the traditional medicine practice of Ayurveda, used to treat a variety of conditions from arthritis to wind.
May 23, 2023
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From vitamin A capsules to herbal teas and zinc tablets, dietary supplements come in all shapes and sizes. But are they a good fit for people with cancer?
Apr 11, 2023
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In a world first, Newcastle researchers have discovered the mechanisms acute myeloid leukemia (AML) cells use to produce "free radicals"—the byproduct of a cell process that aggressively fuels the growth of cancer cells ...
Mar 29, 2023
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Potentially lifesaving steroids commonly given to preterm babies also increase the risk of long-term cardiovascular problems, but a new study in rats has found that if given in conjunction with statins, their positive effects ...
Feb 1, 2023
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Many cardiovascular diseases, such as atherosclerosis, or "hardening of the arteries," correlate to mitochondrial dysfunction and endothelial impairment in the tissues of the heart and blood vessels. Despite a significant ...
Jan 24, 2023
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Nutritionists will tell you to eat a rainbow of fruit and vegetables. This isn't just because it looks nice on the plate. Each color signifies different nutrients our body needs.
Nov 25, 2022
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Pumpkins are synonymous with autumn. But while most of us associate them with Halloween, pie and pumpkin spice lattes, these fruits are in fact extremely versatile. And depending on how they're prepared, they can be good ...
Oct 31, 2022
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New formulation sunscreens could offer better protect against skin cancer by filtering out more harmful ultra-violet rays.
Oct 24, 2022
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Cystic fibrosis patients who supplement their diet with vitamin C can also derive greater benefit from another antioxidant, vitamin E, resulting in a reduction in damaging inflammation, a study led by Oregon State University ...
Sep 28, 2022
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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.
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