that slow or prevent the oxidation
of other chemicals
. Oxidation is a redox chemical reaction
that transfers electrons
from a substance to an oxidizing agent
. Oxidation reactions can involve the production of free radicals
, which can form dangerous chain reactions
. Antioxidants can terminate these chain reactions by removing radical intermediates and can inhibit other oxidation reactions by being oxidized themselves. As a result, antioxidants are often reducing agents
such as thiols
Although oxidation reactions are critical for life, they can also be damaging; hence, plants and animals maintain complex systems of multiple types of antioxidants, such as glutathione, vitamin C, and vitamin E as well as enzymes such as catalase, superoxide dismutase and various peroxidases. Low levels of antioxidant molecules or inhibition of these antioxidant enzymes causes oxidative stress and may damage or kill cells.
As oxidative stress has been implicated in the pathogenesis of many human diseases, the use of antioxidants in pharmacology is intensively studied, particularly as treatments for stroke and neurodegenerative diseases. Antioxidants are also widely used as ingredients in dietary supplements in the hope of maintaining health and preventing diseases such as cancer and coronary heart disease. In addition to these uses in medicine, antioxidants have many industrial uses, such as preservatives in food and cosmetics and preventing the degradation of rubber and gasoline.
History and Philosophy of Chemistry
Wikipedia:WikiProject Chemicals/Data is a collection of links and references that are useful for chemistry-related works. This includes free online chemical databases, publications, patents, computer programs, and various tools.
Science is Fun University of Wisconsin–Madison Chemistry Professor Bassam Z. Shakhashiri, shares the fun of science.
megaConverter The Web's best place to figure out what equals what.
General Chemistry Online Clear text and comprehensive coverage of general chemistry topics by Fred Senese, Dept. of Chemistry Frostburg State University
General Chemistry Demonstration at Purdue Video clips (and descriptions) of lecture demonstrations.
Intota Chemistry Experts A large online listing of real-world chemistry expert biographies provides examples of the many areas of expertise and careers in chemistry.
Chemistry Webercises Directory A large listing of chemistry resources maintained by Steven Murov, Emeritus Chemistry Professor Modesto Junior College.
MathMol MathMol (Mathematics and Molecules) is a good starting point for those interested in the field of molecular modeling.
Chemistry Educational Resources and Essential References from Wiley, the world's largest chemistry publisher
ABC-Chemistry A directory of free full-text journals in chemistry, biochemistry and related subjects.
The Element Song A goofy little song about all of the elements.
Techniques used by chemists
Equipment used by chemists
Here are some things you can do:
Collaboration of the Month
Every month a different chemistry-related topic, stub or non-existent article may be picked. Please improve the article any way you can.
The Nucleus: Crash Course Chemistry #1
Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three t...
Chemical Curiosities: Surprising Science and Dramatic Demonstrations
Professor Chris Bishop, presenter of the 2008 Royal Institution Christmas Lectures, leads us through a spectacular tour of the curious, and sometimes surpris...
Acid-Base Reactions in Solution: Crash Course Chemistry #8
Last week, Hank talked about how stuff mixes together in solutions. Today, and for the next few weeks, he will talk about the actual reactions happening in t...
Bill Nye - Greatest Discoveries - Chemistry - Full Documentary
Documentary produced and narrated by Bill Nye Documentary is courtesy of Discovery Channel Video is property of Discovery Communications LEGAL DISCLAIMER: Re...
The lives of five students are turned upside down when 3 of their classmates commit suicide. Parvati arrives as a new girl to the school. The spirit of one of the dead girls enters her body which subsequently leads to the resolving of the mystery. For more, Log on to: http://www.lehren.co Subscribe & Stay connected: http://www.youtube.com/subscription_center?add_user=lehrenmalayalam Like us on Facebook: http://www.facebook.com/LehrenEntertainment Follo.
CHEMISTRY Premium Studio Live
1. TWO 2. 愛しすぎて (Aishi Sugite) 3. キスからはじめよう (Kiss Kara Hajimeyou) 4. Once Again 5. Go Alone.
Losing fingers to chemistry - Periodic Table of Videos
The Prof is back in the lab with a Potassium Dichromate reaction and a story of lost fingers! More chemistry at http://www.periodicvideos.com/ Follow us on F...
Chemistry Lesson - 1 - What is Chemistry?
Visit my website at http://thenewboston.com for all of my videos! I also do a podcast three nights a week. You can watch the live show at http://www.justin.t...
The Creation of Chemistry - The Fundamental Laws: Crash Course Chemistry #3
Today's Crash Course Chemistry takes a historical perspective on the creation of the science, which didn't really exist until a super-smart, super-wealthy Fr...
Science is Fun and the Joy of Learning | MIT Chemistry Behind the Magic
MIT Chemistry Behind the Magic View the complete course: http://ocw.mit.edu/behindthemagic Instructor: Bassam Shakhashiri License: Creative Commons BY-NC-SA ...
Mon, 17 Jun 2013 12:48:22 -0700
COVINGTON, La. - Two children and an instructor were injured after an accident at a chemistry lab at a summer camp at St. Scholastica High School in Covington Monday morning. Some members of the summer camp were in the chemistry lab around 10:30 ...
Mon, 17 Jun 2013 11:06:09 -0700
What happens when you mix cobalt chloride with ferrous sulfate? We have no idea. But when you mix four science lovers with a dance rock band you get Chemistry Club. Download a track from these geeks below. Only the rare nerd would ever associate a ...
Sun, 16 Jun 2013 16:51:51 -0700
Washington Mystics managing partner Sheila Johnson emerged from a chair in the owner's suite at Verizon Center to clasp her hands together in prayer, the tension almost too much to handle. Forward Crystal Langhorne, one of the few remaining vestiges ...
Mon, 17 Jun 2013 07:31:37 -0700
Online Shop · > Chemistry World Magazine · > ChemNet Student Networking · > Advertise with us · > Chemistry World Jobs · > Conferences & Events · > Educational Resources · > Library & Information Centre · > ChemSpider Synthetic Pages · > Submission ...
Sun, 16 Jun 2013 08:47:19 -0700
Biggie, Biggie, Biggie, can't you see... the hidden message in this girl's yearbook quote? You may need a periodic table. (Story Continues Below) jessica lee yearbook. Redditor AugusttRush submitted a photo on Saturday of Jessica Lee's end-of-the-year ...
Fri, 14 Jun 2013 17:56:19 -0700
Jerome Karle, a U.S. Naval Research Laboratory scientist who shared the Nobel Prize in chemistry for discovering a way to determine the structure of molecules, a breakthrough that made possible significant advances in medicine and other fields of ...
Sat, 15 Jun 2013 10:25:01 -0700
The 2013 meeting is dedicated to chemistry and will involve young researchers from 78 different countries. In anticipation of the event, which will take place from June 30 through July 5, we are highlighting a group of attendees under 30 who represent ...
Mon, 17 Jun 2013 02:02:24 -0700
Maybe they've stayed together so long because of a few acetyl groups near a couple of key genes. Image courtesy of Wikimedia Commons. Love at first sight is a magical, mysterious thing. Unless you are prairie vole that is. Then, if the results of a new ...
Oops, we seem to be having trouble contacting Twitter
You can talk about Chemistry with people all over the world in our discussions.