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Conductive Silver Ink from a Ballpoint Pen
 
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Materials researchers at the University of Illinois, Urbana-Champaign have developed a highly conductive silver ink. In this video, Analisa Russo, a graduate student in the research group of Professor Jennifer Lewis shows exactly how to make this amazing ink, which could be used for a wide variety of hobby projects and in advanced electronics hardware.
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Perovskite solar cells made simply
 
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SIMPLE SETUP Ordinary lab equipment is all that's required to make Perovskite solar cells.
Просмотров: 63379 CEN Online
The 2017 Nobel Prize in Chemistry: Cryo-electron microscopy explained
 
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Jacques Dubochet, Joachim Frank, and Richard Henderson have claimed the 2017 Nobel Prize in Chemistry for their development of cryo-electron microscopy. ↓↓More info and references below↓↓ This year’s winners surprised many people and stirred up the perennial “is this really chemistry?” debate. But the Nobel committee (and the president of the American Chemical Society, Allison Campbell) believes that cryo-EM’s development is firmly entrenched in the central science. Check out our explainer behind the work that’s enabling researchers to image large biomolecules with atomic precision, ushering in a new era of biochemistry. And there was at least one person whom this pick did not surprise. Shout out to Gurunath Ramanathan, a viewer of C&EN’s Nobel Prediction Webinar who submitted this guess: “Cryoelectron microscopy is changing the way in biology. My bet is on analytical chemistry.” Watch the full webinar here: https://www.youtube.com/watch?v=GSGms9DQn7w And be sure to check out these references for more on cryo-EM. Cryo-electron microscopy innovators win 2017 Nobel Prize in Chemistry | C&EN https://cen.acs.org/articles/95/web/2017/10/Cryo-electron-microscopy-innovators-win-2017-Nobel-Prize-in-Chemistry.html The first herpes capsid at atomic resolution | C&EN https://cen.acs.org/articles/95/i27/first-herpes-capsid-atomic-resolution.html Uncovering The Spliceosome’s Secrets | C&EN https://cen.acs.org/articles/93/i39/Uncovering-Spliceosomes-Secrets.html New close-up views of the nuclear pore complex | C&EN https://cen.acs.org/articles/94/i16/New-closeviews-nuclear-pore-complex.html Cryo-electron tomography provides first view of a cell’s nucleus in its natural, undisturbed environment | C&EN https://cen.acs.org/articles/94/i9/Cryo-electron-tomography-provides-first.html Bold, Probably Incorrect Predictions of the Future of X-ray Diffraction | C&EN http://cen.xraycrystals.org/essay-on-the-future-of-crystallography.html The Nobel Prize in Chemistry 2017 | Nobelprize.org https://www.nobelprize.org/nobel_prizes/chemistry/laureates/2017/ Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly news magazine of the American Chemical Society. Contact us at speakingofchem@acs.org!
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How To Print A 3-D Object With Laser Sintering
 
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For more on 3-D printing: http://cenm.ag/3d This is a step by step guide to the process of laser sintering from researchers at the University of Texas, Austin. This technique, a type of 3-D printing, produces solid objects from polymer and metal powders.
Просмотров: 348145 CEN Online
Growing Synthetic Diamonds
 
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More at http://cenm.ag/carbon. Russell J. Hemley, director of the Geophysical Laboratory at the Carnegie Institution for Science in Washington, D.C., walks through the process for making diamonds in a lab.
Просмотров: 134067 CEN Online
Inside A Nanocellulose Pilot Plant--From Wood To Nanomaterials
 
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The latest nanomaterials are coming from a seemingly unlikely source--the forest. C&EN Senior Correspondent Mitch Jacoby takes you inside a nanocellulose plant in Madison, Wis., where scientists are extracting these materials from wood pulp. Like C&EN? Want more chemistry video goodness? Subscribe to our YouTube channel: https://www.youtube.com/user/CENonline Subscribe to C&EN to watch science videos with a focus on chemistry, and to hear from the researchers behind it all. -- Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag Tumblr: http://cenwatchglass.tumblr.com Tumblr: http://cenchempics.tumblr.com
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The Chemistry of Truffles, the Most Expensive Food in the World
 
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Take a crack at our truffle trivia challenge: http://cen.acs.org/articles/93/i36/Makes-Truffles-Enticing-Foodies-Unwittingly.html#truffle-trivia ↓↓Full description and references below↓↓ Although you probably haven’t dropped a cool $60 grand for a truffle, you may have wondered why some people are willing to do so. In this episode, Sarah Everts shows how chemistry fuels the fuss over the fungus…and reveals the shady side of truffle oil. If this episode leaves you wanting more, check out these great resources. What Makes Truffles So Enticing? http://cen.acs.org/articles/93/i36/Makes-Truffles-Enticing-Foodies-Unwittingly.html Truffles: The Most Expensive Food In the World | CBS News http://www.cbsnews.com/news/truffles-the-most-expensive-food-in-the-world/ The Dark Side of the Truffle Trade | The Atlantic http://www.theatlantic.com/international/archive/2014/01/the-dark-side-of-the-truffle-trade/283073/ Want even more Speaking of Chemistry? Like us on facebook: https://www.facebook.com/SpeakingOfChem Or drop us a line at speakingofchem@acs.org Speaking of Chemistry is brought to you by Chemical & Engineering News, the news magazine of the American Chemical Society.
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Is it wise to do multiple postdocs?
 
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More at http://cenm.ag/postd. Ph.D. chemists who do more than one postdoctoral stint after finishing their degree--whether for personal reasons or because of the economy-- often face harsh realities in trying to find permanent positions. C&EN Senior Editor Linda Wang spoke to postdocs and experts about this issue at the American Chemical Society National Meeting in New Orleans.
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The 2018 Nobel Prize in Chemistry: Directed evolution & phage display — Speaking of Chemistry
 
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Frances Arnold, George Smith, and Gregory Winter won the 2018 Nobel Prize in Chemistry. Watch our latest episode to learn why. ↓↓More information below↓↓ This trio took home chemistry’s top honor for developing techniques, directed evolution and phage display, that identify useful new enzymes, antibodies, and more. We know a lot of chemistry fans were rooting for lithium-ion-battery guru John Goodenough to be tapped for the 2018 prize, but stay with us: We are excited about the impactful chemistry involved this year, and we’re about to break it down for you. Let us know what you think about the award going to directed evolution and phage display in the comments. Correction: At about 2:30 in the video, we incorrectly refer to Nobel Laureate Gregory Winter as George Winter. Sources: Celia Arnaud’s stunning news story on the prize for C&EN: Frances H. Arnold, George P. Smith, and Gregory P. Winter share 2018 Nobel Prize in Chemistry | C&EN https://cen.acs.org/biological-chemistry/Frances-H-Arnold-George-P-Smith-and-Gregory-P-Winter-share-2018-Nobel-Prize-in-Chemistry/96/web/2018/10 Frances Arnold’s work: Tuning the activity of an enzyme for unusual environments: sequential random mutagenesis of subtilisin E for catalysis in dimethylformamide | Proc. Natl. Acad. Sci. USA http://doi.org/10.1073/pnas.90.12.5618 George P. Smith’s work: Filamentous fusion phage: novel expression vectors that display cloned antigens on the virion surface | Science http://doi.org/10.1126/science.4001944 Greg Winter’s work: Phage antibodies: filamentous phage displaying antibody variable domains | Nature http://doi.org/10.1038/348552a0 Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society. Contact us at speakingofchem@acs.org!
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X-ray Photoelectron Spectroscopy
 
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Roy Murray, a graduate student in S. Ismat Shah's group at the University of Delaware department of Materials Science and Engineering, shows us an X-ray Photoelectron Spectroscopy instrument
Просмотров: 24386 CEN Online
How to Avoid Kidney Stones - Speaking of Chemistry
 
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Kidney stones can be excruciatingly painful, and half a million people in the U.S. end up in the emergency room because of them. In this episode of Speaking of Chemistry, guest host Linda Wang explores how kidney stones form and shares some of the most recent research in this area. She even offers tips on how to prevent them. Subscribe! http://bit.ly/CENOnline Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! Sources: Zinc May Help Drive Kidney Stone Formation Issue Date: June 8, 2015 http://cen.acs.org/articles/93/i23/Zinc-Help-Drive-Kidney-Stone.html?type=paidArticleContent
Просмотров: 20031 CEN Online
How to Make Quantum Dots
 
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Charli Dvoracek, a graduate student in Peter Searson's lab at the Johns Hopkins Institute for NanoBioTechnology (INBT) shows us how to make Cadmium Selenide semiconductor nanocrystals, which are better known as quantum dots. These nanoparticles could be used in a wide range of products from cancer tests to solar cells.
Просмотров: 62469 CEN Online
Chem-lapsed: Tomato Juice Rainbow
 
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How can you turn bright-red tomato juice into a rainbow of color? It just takes one extra ingredient -- and some chemistry chops. Just remember, don’t drink the rainbow. For more of the science, check out the throwback Journal of Chemical Education paper here: http://pubs.acs.org/doi/abs/10.1021/ed063p1092 Chem-lapsed is a series of chemistry-themed time-lapses created by Dorea Reeser for C&EN.
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How cannabis growers use natural pest control
 
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It’s a major bummer when bugs destroy your cannabis plants, especially if your business is growing legal marijuana. https://cen.acs.org/business/agriculture/Nurturing-cannabis/96/i21 ↓↓More info and references below↓↓ Eddie Funtanellas and his team at Phantom Farms in Oregon use natural methods to keep pests away from their valuable crop. Cleaning up cannabis | C&EN https://cen.acs.org/articles/95/i45/Cleaning-cannabis.html Making Legal Marijuana Safe | C&EN https://cen.acs.org/articles/93/i16/Making-Legal-Marijuana-Safe.html
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Turn Up The Alcohol By Volume
 
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Find out how yeast and brewers work together to beef up a beer's alcohol content. To learn more about Avery and Renegade, visit their websites: http://averybrewing.com/age-verification/?referrer=/ http://renegadebrewing.com/ Photo credits Yeast micrograph: J. Cell. Biol. 192: 615-629 http://www.cellimagelibrary.org/images/13901 Mash tun interior: Erik Charlton https://www.flickr.com/photos/erikcharlton/2812431871/in/photolist-5hws1F-4ZJgce
Просмотров: 5950 CEN Online
Sunscreen SPF Explained - Speaking of Chemistry Ep.5
 
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Summertime means slathering on sunscreen, but are all the new sky-high SPF labels that much better at protecting you? Chemical & Engineering News Senior Editor Carmen Drahl and Associate Editor Sophia Cai explain the chemistry behind SPF, so you don't get burned. More reading: J. Chem. Educ., 1998, 75 (6), p 757 DOI: 10.1021/ed075p757 http://pubs.acs.org/doi/abs/10.1021/ed075p757?journalCode=jceda8 Sunscreen-The Burning Facts-EPA http://www.epa.gov/sunwise/doc/sunscreen.pdf What's That Stuff? Sunscreens http://pubs.acs.org/cen/whatstuff/stuff/8025sunscreens.html Sunscreen Delays ($) http://cen.acs.org/articles/92/i19/Sunscreen-Delays.html Lawmakers Want FDA To Act On Sunscreens ($) http://cen.acs.org/articles/92/i22/Lawmakers-Want-FDA-Act-Sunscreens.html Want more chemistry video goodness? Subscribe! http://bit.ly/CENOnline Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag Tumblr: http://cenwatchglass.tumblr.com Tumblr: http://cenchempics.tumblr.com
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Powdered Alcohol: What It Is And How You Make It
 
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C&EN's Jeff Huber and Sophia Cai visited chemistry professor Matt Hartings at American University to learn about--and taste--powdered alcohol. To learn more, go to http://cenm.ag/palco. Like C&EN? Want more chemistry video goodness? Subscribe to our YouTube channel: https://www.youtube.com/user/CENonline Subscribe to C&EN to watch science videos with a focus on chemistry, and to hear from the researchers behind it all. -- Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag Tumblr: http://cenwatchglass.tumblr.com Tumblr: http://cenchempics.tumblr.com
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Metal Organic Frameworks
 
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Metal Organic Frameworks, or MOFs, are crystalline materials with extremely high surface areas. They can be used to store hydrogen and methane for fuel cell cars, or they could be used to sequester the carbon dioxide output of factories and power plants. In this video, Caitlin Stevens gives a tour of the Yaghi lab at UCLA. She explains how MOFs are made and tested.
Просмотров: 5649 CEN Online
19th century medicine & voodoo -- A Tour of the New Orleans Pharmacy Museum
 
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C&EN invites viewers on a virtual tour of the New Orleans Pharmacy Museum, located in the heart of the French Quarter. This 19th century apothecary shop is filled from floor to ceiling with bottles and jars containing crude drugs, herbal medicines, and voodoo potions. Tour guide Matthew Chandelier explains a few of the things chemists will find in this treasure chest of ancient medicine.
Просмотров: 6906 CEN Online
Supermembrane Separates Oil and Water with Ease
 
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For more information, go to http://cenm.ag/membrane. Even though oil and water don't mix, when they do come together, as in oil spills, they're difficult to separate. Researchers at the University of Michigan and the Air Force Lab have now developed a membrane that separates the substances with ease, via gravity filtration. In this clip, watch the membrane in action and learn about the materials it's made from.
Просмотров: 7759 CEN Online
Scientific Cocktail Toppers Move from the 3D Printer to the Bar
 
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Last fall, MIT researchers debuted two scientific cocktail toppers - a cocktail boat and floral pipette - that they developed in collaboration with celebrity chef José Andrés. To find out how close these two garnishes are to a bar or restaurant near you, C&EN went inside Andrés's headquarters, ThinkFoodGroup. The garnishes both rely on a special property of liquids, surface tension, to work. The edible prototypes in this video are made with silicone molds fashioned with help from a 3D printer. The garnishes are not available to the public yet, but stay tuned. For more details, see http://cenm.ag/wow and the paper "Biomimicry and the Culinary Arts" by Burton, et al. 2013 at: http://iopscience.iop.org/1748-3190/8/4/044003/article
Просмотров: 19318 CEN Online
Inside of an NMR Spectrometer
 
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George Furst, Associate Director Tech. Facilities at the University of Pennsylvania in Philadelphia, gives a tour of a deconstructed 200 MHz NMR. Filmed and edited by Kirk Zamieroski
Просмотров: 17107 CEN Online
What Is Tinsel Made Of? Speaking of Chemistry Ep. 12
 
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How is the shiny tinsel that decorates many Christmas trees made? Today it's mostly made of plastic. But did you know tinsel used to contain chemical elements like lead, aluminum, or copper? Find out all about tinsel's chemistry history in this very special holiday episode of Speaking of Chemistry. Special thanks to the following for photos: Materialscientist/Wikimedia commons http://en.wikipedia.org/wiki/Aluminium#mediaviewer/File:Aluminium-4.jpg http://en.wikipedia.org/wiki/Copper#mediaviewer/File:NatCopper.jpg AlchemistHP/Wikimedia commons http://en.wikipedia.org/wiki/Lead#mediaviewer/File:Lead_electrolytic_and_1cm3_cube.jpg Brite Star Manufacturing Co. (tinsel product photos) Darron Fick/Flickr https://www.flickr.com/photos/thunderpants/173076522/ Jüppsche/Wikimedia commons http://commons.wikimedia.org/wiki/File:Lametta_-_Christmas_decorations.jpg Rene Schwietzke/Flickr https://www.flickr.com/photos/rene-germany/2126809489/ simpleinsomnia/Flickr https://www.flickr.com/photos/simpleinsomnia/9698410745 https://www.flickr.com/photos/simpleinsomnia/15240693388 snapshotsofthepast/Flickr https://www.flickr.com/photos/oldeyankee/8128048724 https://www.flickr.com/photos/oldeyankee/8128022305/ Carmen Drahl Susan Waggoner Like C&EN? Want more chemistry video goodness? Subscribe to our YouTube channel: https://www.youtube.com/user/CENonline Subscribe to C&EN to watch science videos with a focus on chemistry, and to hear from the researchers behind it all. -- Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag
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Is Bleaching Hair Bad For You? - Speaking of Chemistry Ep. 14
 
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Subscribe! http://bit.ly/CENOnline If you’re looking for a new ‘do, you might be considering bleaching your flowing locks. But adding hydrogen peroxide to your head can actually do a lot of damage. C&EN Associate Editor Matt Davenport breaks down why going platinum blonde could be bad for your "head suit." Looking for more information on hair chemistry? Check out these articles. Surface Chemistry Of Becoming A Blonde http://cen.acs.org/articles/92/i38/Surface-Chemistry-Becoming-Blonde.html Color Challenge http://cen.acs.org/articles/86/i6/Color-Challenge.html Hair Care Ingredients Makers Get Creative http://cen.acs.org/articles/91/i19/Hair-Care-Ingredient-Makers-Creative.html L’Oréal Hair Science http://www.hair-science.com/_int/_en/index.aspx Colour To Dye For http://mosaicscience.com/story/hair-dye Melanin micrograph courtesy of Int. J. Trichology: http://openi.nlm.nih.gov/detailedresult.php?img=2938584_IJT-1-83-g002&req=4 Hair lipid schematic adapted from Langmuir: http://pubs.acs.org/doi/abs/10.1021/la500461y?source=cen ----- Subscribe to C&EN to watch science videos with a focus on chemistry, and to hear from the researchers behind it all. Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag
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Artificial Leaf Generates Electricity From Light
 
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This solar-cell device mimics the ability of a leaf to convert sunlight into usable energy. It's the brainchild of a team led by MIT's Daniel G. Nocera, working in conjunction with researchers at SunCatalytix, a company Nocera founded. The device is based on two water-splitting photocatalysts developed by Nocera's group. Simply dropping the solar cell in water and exposing it to light, O2 bubbles begin streaming off the side coated with a cobalt borate catalyst, and H2 bubbles begin streaming off the other side coated by a nickel-molybdenum-zinc alloy catalyst. If placed in a vessel with a barrier, the H2 and O2 could be collected separately and stored, and then later be used to power a fuel cell. Nocera envisions this type of simple, low-cost solar cell, once optimized, could be useful to power individual homes in developing regions around the world. More information here http://cenm.ag/electro
Просмотров: 28827 CEN Online
What You Need To Know About Microbeads - Speaking of Chemistry Ep. 10
 
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Your toothpaste and face scrub probably get their scrubbing power from tiny plastic beads contained within. In Episode 10 of Speaking of Chemistry, Lauren K. Wolf talks about these polyethylene “microbeads” and why environmental scientists and dentists alike are nervous about them getting into lakes, rivers, and your gums. Like C&EN? Want more chemistry video goodness? Subscribe! Subscribe to C&EN to watch science videos with a focus on chemistry, and to hear from the researchers behind it all. Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag Tumblr: http://cenwatchglass.tumblr.com
Просмотров: 7216 CEN Online
How To 3-D Print Your Own Molecular Models
 
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Chemists and chemistry educators can now easily generate all the files they need to 3-D print their own molecular models thanks to the NIH 3D Print Exchange. Watch this video to learn how and visit cenm.ag/3dprintx for more.
Просмотров: 3955 CEN Online
Why Don't We Recycle Styrofoam? - Speaking of Chemistry
 
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It’s common practice to recycle paper, glass, and many plastics—in fact, about 35% of the trash produced in the U.S. is recycled or composted. So why can’t we recycle what’s commonly referred to as Styrofoam? (It’s actually expanded polystyrene, or EPS—a bit different!) In episode 19 of Speaking of Chemistry, host Sophia Cai explains that EPS actually can be recycled, but the prohibitive costs have prompted cities to ban the pesky product instead. If this episode leaves you wanting to know more about recycling EPS, read the sources below. Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! Subscribe to C&EN’s YouTube channel! Fuming Over Foam http://cen.acs.org/articles/93/i12/Fuming-Over-Foam.html Volume 93 Issue 12 | pp. 23-25 Issue Date: March 23, 2015 New York City Bans Expanded Polystyrene Food Containers, Opens Market To Alternatives http://cen.acs.org/articles/93/web/2015/01/New-York-City-Bans-Expanded.html C&EN Latest News Web Date: January 12, 2015
Просмотров: 21880 CEN Online
How MOFs are Made and Tested
 
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Metal organic frameworks can double the capacity of hydrogen fuel tanks and capture carbon emissions from factories. A graduate student in the lab of Omar Yaghi explains how they are made.
Просмотров: 4391 CEN Online
Making a safer lithium-ion battery
 
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Researchers at the University of Maryland and the Army Research Lab are building lithium-ion batteries that won’t explode when damaged. ↓↓More info and references below↓↓ The lithium-ion batteries in our electronic devices use organic electrolytes to store charge. The problem is that these electrolytes are flammable. Li-ion batteries that replace those electrolytes with water-based versions remove the risk of explosions but don’t perform as well. In this video University of Maryland postdoc Chongyin Yang demonstrates how his team uses an anode with a special coating to make aqueous batteries that can reach 4.0 V—the voltage level of today’s commercial Li-ion batteries. Charged up about batteries? Check out these great resources: Periodic graphics: Why Li-ion batteries catch fire | C&EN https://cen.acs.org/articles/94/i45/Periodic-graphics-Li-ion-batteries.html Flexible batteries get safe aqueous electrolytes | C&EN https://cen.acs.org/articles/95/web/2017/08/Flexible-batteries-safe-aqueous-electrolytes.html “Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries | Science http://science.sciencemag.org/content/350/6263/938/F5 Aqueous Li-Ion Batteries | Joule http://www.cell.com/joule/abstract/S2542-4351(17)30034-X
Просмотров: 4235 CEN Online
What Does Space Smell Like? - Speaking of Chemistry Ep. 15
 
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Subscribe! http://bit.ly/CENOnline One of the most surprising things about space is that it has a smell, NASA astronaut Mike Hopkins told Reddit readers this past summer. But how is that even possible? In this episode of Speaking of Chemistry, Matt Davenport sticks his nose into the science behind astronomical aromas and celestial body odors. Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag References: Fireworks Fashion, Extraterrestrial Smells http://cen.acs.org/articles/92/i44/Fireworks-Fashion-Extraterrestrial-Smells.html The ‘Perfume’ of 67P/C-G http://blogs.esa.int/rosetta/2014/10/23/the-perfume-of-67pc-g/ Apollo Chronicles: The Mysterious Smell of Moondust http://www.nasa.gov/exploration/home/30jan_smellofmoondust_prt.htm The Moon Smells: Apollo Astronauts Describe Lunar Aroma http://www.space.com/26932-moon-smell-apollo-lunar-aroma.html Astronaut Describes Missions and Smell of Space http://kstp.com/article/stories/s3339965.shtml What Does Space Smell Like http://www.popsci.com/science/article/2013-07/what-does-space-smell Special thanks to Colin Furze for building a firework safety suit: https://www.youtube.com/channel/UCp68_FLety0O-n9QU6phsgw If that blows your mind, you’ll probably want to check out his YouTube channel: https://www.youtube.com/channel/UCp68_FLety0O-n9QU6phsgw Also, give Mike Hopkins’s Reddit Ask Me Anything a read if you want to know what it’s like living in space: http://www.reddit.com/r/IAmA/comments/27pv5o Finally, 67P/C-G is actually named after the scientists who discovered it in 1969, Klim Churyumov and Svetlana Gerasimenko. Read more about the comet here: http://www.esa.int/Our_Activities/Space_Science/Rosetta/Frequently_asked_questions And, for more on its namesake, check out this Q&A with Gerasimenko: http://www.esa.int/Our_Activities/Space_Science/Rosetta/Happy_birthday_An_interview_with_Svetlana_Gerasimenko
Просмотров: 6542 CEN Online
R. B. Woodward, chemistry legend
 
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On what would be Robert Burns Woodward's 100th birthday, C&EN looks back at his legacy using footage of the man himself. To read more, visit http://cenm.ag/woodward100. Watch the original video clips here: http://bit.ly/RBWoodward Speical thanks to the Hoye Group & Addison Ault for conserving and sharing this footage.
Просмотров: 7203 CEN Online
Hypoallergenic Isn't Really a Thing - Speaking of Chemistry Ep. 16
 
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It’s a simple claim made on thousands of personal care products for adults and kids: hypoallergenic. But what does that actually mean? Turns out, it can mean whatever manufacturers want it to mean, and that can leave you feeling itchy. Speaking of Chemistry is back this week with Sophia Cai explaining why “hypoallergenic” isn’t really a thing. References: Medical Professionals Call For Regulation Of Claims That Cosmetics Are Hypoallergenic http://cen.acs.org/articles/92/i50/Medical-Professional-Call-Regulation-Claims.html Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag
Просмотров: 5598 CEN Online
How The World's First Lithium Ion Microscope Works
 
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Watch this guided tour of a new type of focused ion beam built for nanoscale imaging and machining. Learn more at http://cenm.ag/liscope Jabez McClelland and his team developed the instrument at the Center for Nanoscale Science & Technology at NIST. You can read more about it in their paper in the journal, Ultramicroscopy: http://www.sciencedirect.com/science/article/pii/S0304399114000679 Want to learn more about how Brookhaven National Lab created that 3-D image of a battery anode? Check out this paper from Jun Wang's group in Angewandte Chemie: http://onlinelibrary.wiley.com/doi/10.1002/anie.201310402/abstract
Просмотров: 2382 CEN Online
Painting Solar Cells with Nanoparticle Paste
 
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For more information, read the C&EN article here: http://cenm.ag/paintable Researchers at Notre Dame have developed a solar cell that is remarkably easy to assemble because the middle layer can be painted onto a clear electrode. First, they mix t-butanol, water, cadmium sulfide and titanium dioxide for 30 minutes. Next, they mask off a clear electrode with office tape. Once the tape is in place, they spread the mixture onto the electode and then anneal it with a heat gun. Finally, they sandwich an electrolyte solution between the new electrode and a graphene composite electrode. And then, it's time for testing under a beam of artificial light. The Paper: http://pubs.acs.org/doi/abs/10.1021/nn204381g
Просмотров: 82246 CEN Online
Are Strawberries Going Away? - Speaking of Chemistry Ep. 24
 
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Strawberries are sweet, juicy, and delightful. Unfortunately, they’re also attractive bait for a litany of pests and diseases. In 2016, an expiring federal pesticide exemption could mean the end of strawberries as we know them. In this Speaking of Chemistry video, Sophia Cai explains the problem and some possible solutions. Subscribe! http://bit.ly/CENOnline If this episode leaves you itching for more, check out the sources below. Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! Sources: Strawberries In Peril Because Of Fumigant Phaseout Volume 93 Issue 23 | pp. 18-19 Issue Date: June 8, 2015 http://cen.acs.org/articles/93/i23/Strawberries-Peril-Fumigant-Phaseout.html Alternatives to Methyl Bromide: A Florida Perspective APS 2005, DOI: 10.1094/APSnetFeature/2005-0605 http://www.apsnet.org/publications/apsnetfeatures/Pages/MethylAlternatives.aspx A Pest Management Strategic Plan for Strawberry Production in California The California Strawberry Commission (CSC) & The California Minor Crops Council (CMCC) http://www.ipmcenters.org/pmsp/pdf/CASTRAWBERRY.PDF University of California Plant Breeding Center http://plantbreeding.ucdavis.edu/ Tomato Diseases On The Rise In Absence Of Methyl Bromide Posted By: Paul Rusnak, Growing Produce | February 1, 2014 http://www.growingproduce.com/vegetables/tomato-diseases-on-the-rise-in-absence-of-methyl-bromide/ Soil Fumigants Website Chloropicrin Manufacturers' Task Force, Methyl Bromide Industry Panel, and Metam Task Force http://www.fumeinfo.org/
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How To Make Synthetic Leather In An Eco-friendly Way - Speaking of Chemistry Ep. 18
 
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Alternatives to leather made from animal hides have been around for decades. Synthetic leather is in our car seats and our stylish jackets. But at least one of the chemicals used to make faux leather is highly toxic. In episode 18 of Speaking of Chemistry, host Lauren Wolf explains how companies usually make pleather and talks about a more environmentally friendly manufacturing process that's in the works. If this episode leaves you wanting more video goodness, read the sources below. Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! Subscribe to C&EN’s YouTube channel! Synthetic Leather's Green Revivial http://cen.acs.org/articles/92/i33/Synthetic-Leathers-Green-Revival.html Volume 92 Issue 33 | pp. 28-29 Issue Date: August 18, 2014 Leather From Another Era http://cen.acs.org/articles/87/i5/Leather-Another-Era.html Volume 87 Issue 5 | pp. 18-21 Issue Date: Feb. 2, 2009
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Insect Chemistry - Speaking of Chemistry Ep. 20
 
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Subscribe! http://bit.ly/CENOnline Insects may not be the most charismatic creatures on the planet, but what they lack in cuddliness, they make up for with chemical ingenuity. In Episode 20 of Speaking of Chemistry, Matt Davenport looks at three of the craziest six-legged chemists out there. If this episode leaves you wanting more, check out the sources below. Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! For more of C&EN’s critter chemistry videos, visit https://www.youtube.com/playlist?list=PLM2CTqSTy7cRaqZg4_UJ7fXXIFyPaZipQ Sources: Beetle’s Explosive Spray Mechanism Revealed By X-Ray Imaging Volume 93 Issue 18 | p. 7 Issue Date: May 4, 2015 http://cen.acs.org/articles/93/i18/Beetles-Explosive-Spray-Mechanism-Revealed.html. To Outwit Plant Defenses, Hungry Caterpillars Turn Chemists Volume 92 Issue 40 | p. 10 Issue Date: October 6, 2014 http://cen.acs.org/articles/92/i40/Outwit-Plant-Defenses-Hungry-Caterpillars.html An Ant’s Acid Antidote Volume 92 Issue 9 | pp. 44-45 Issue Date: March 3, 2014 http://cen.acs.org/articles/92/i9/Ants-Acid-Antidote.html Ant Battle Yields Ionic Liquid Volume 92 Issue 30 | p. 32 Issue Date: July 28, 2014 http://cen.acs.org/articles/92/i30/Ant-Battle-Yields-Ionic-Liquid.html For more critter chemistry stories, visit: http://cen.acs.org/collections/critchem.html Beetle footage courtesy of Melanie Gonick/MIT: https://www.youtube.com/watch?v=TgqF-ND2XcY Ant footage from Edward G. LeBrun, Nathan T. Jones, Lawrence E. Gilbert, Science 2014, DOI: 10.1126/science.1245833 http://www.sciencemag.org/content/343/6174/1014/suppl/DC1 If you’re wondering where that 10 quintillion insect estimate came from, visit the Entomological Society of America: http://www.entsoc.org/resources/faq Lastly, Prince did not name the Rasberry crazy ants. They’re named for Tom Rasberry, the exterminator who identified the invasive pests and the threat they pose. Check out this video to learn more about Tom and the crazy ants: https://www.youtube.com/watch?v=NgpCXGsC6PU Craving even more juicy bug coverage? Here are the scientific publications behind C&EN’s original stories. Bombardier Beetle Spray: Eric M. Arndt, Wendy Moore, Wah-Keat Lee, Christine Ortiz, Science 2015, DOI: 10.1126/science.1261166 http://www.sciencemag.org/content/348/6234/563 Fall Armyworm Stereochemistry: Felipe C.Wouters et al., Angew. Chem. Int. Ed. 2014 DOI: 10.1002/anie.201406643 http://onlinelibrary.wiley.com/doi/10.1002/anie.201406643/abstract Tawny Crazy Ant-idote: Edward G. LeBrun, Nathan T. Jones, Lawrence E. Gilbert, Science 2014, DOI: 10.1126/science.1245833 http://www.sciencemag.org/content/343/6174/1014/suppl/DC1 Li Chen et al., Angew. Chem. Int. Ed. 2014, DOI: 10.1002/anie.201404402 http://onlinelibrary.wiley.com/doi/10.1002/anie.201404402/abstract
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How do some animals glow? — Speaking of Chemistry
 
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What’s the difference between fluorescence and bioluminescence? We illuminate the biochemical distinctions. ↓↓More info and references below↓↓ Special thanks to everyone who shared their amazing glowing animal footage with us. Be sure to check out Jelly Club’s YouTube page for more stunning jelly videos: https://www.youtube.com/user/JellyClubAdmin To learn more about Marc Zimmer’s research at Connecticut College and to find more great info and images involving GFP, visit his website: http://www.conncoll.edu/ccacad/zimmer/MZ-8/ To see more luminescent creatures photographed by NOAA, visit their Ocean Explorer webpage: http://oceanexplorer.noaa.gov/explorations/09bioluminescence/welcome.html And don’t forget to watch the Wellcome Trust’s video to learn all about those wild blue nematode worms: https://www.youtube.com/watch?v=pAw5rjgHWc0 Even more brilliant references: First naturally-fluorescing frog found in Argentina | C&EN http://cen.acs.org/articles/95/i12/First-naturally-fluorescing-frog-found.html Glowing mushroom’s mechanism unmasked | C&EN http://cen.acs.org/articles/95/i18/Glowing-mushroomsmechanism-unmasked.html Novel roles for GFP | C&EN http://cen.acs.org/articles/87/i18/Novel-Roles-GFP.html Spider Seduction Requires UV Light | C&EN http://cen.acs.org/articles/85/i5/Spider-Seduction-Requires-UV-Light.html Naturally occurring fluorescence in frogs | Proc. Natl. Acad. Sci. USA http://www.pnas.org/content/114/14/3672 Mechanism and color modulation of fungal bioluminescence | Sci. Adv. http://advances.sciencemag.org/content/3/4/e1602847 Live cell imaging of PC3 prostate cancer cells | Figshare https://figshare.com/articles/PC3_GFPEN2_sample2_cell_fusion_mp4/4057197 Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly news magazine of the American Chemical Society. Connect with us at www.facebook.com/SpeakingOfChem and/or at speakingofchem@acs.org!
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Keeping Cool without Killing the Planet - Speaking of Chemistry Ep. 21
 
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Subscribe! http://bit.ly/CENOnline Refrigeration is a staple of modern living—we use refrigerants in air conditioners, aerosol spray cans, and, well, refrigerators. But it turns out that the most popular refrigerants of the 20th century depleted the ozone and had high global warming potentials. In episode 21 of Speaking of Chemistry, Sophia Cai takes a look at the pros and cons of new refrigerants recently approved by the Environmental Protection Agency to be used as more environmentally friendly alternatives. If this episode leaves you wanting more, check out the links below.. Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! The Montreal Protocol Is Healing Earth’s Ozone Hole http://cen.acs.org/articles/93/i22/Montreal-Protocol-Healing-Earths-Ozone.html Volume 93 Issue 22 | p. 8 Issue Date: June 1, 2015 Climate-Friendly Refrigerants http://cen.acs.org/articles/93/i10/Climate-Friendly-Refrigerants.html Volume 93 Issue 10 | p. 6 Issue Date: March 9, 2015 EPA Clamps Down On Anhydrous Ammonia For Refrigeration http://cen.acs.org/articles/93/i9/EPA-Clamps-Down-Anhydrous-Ammonia.html Volume 93 Issue 9 | p. 26 Issue Date: March 2, 2015 Halocarbons Reassessed http://cen.acs.org/articles/91/i34/Halocarbons-Reassessed.html Volume 91 Issue 34 | pp. 27-28 Issue Date: August 26, 2013
Просмотров: 3447 CEN Online
Tissue Imaging with Mass Spectrometry
 
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Using MALDI, researchers are able to identify the locations of lipids in tissue samples. In this video, professor Robert C. Murphy at CU Denver explains the work done by his research group.
Просмотров: 5471 CEN Online
Beer Brewing Chemistry - Speaking of Chemistry Ep. 17
 
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Every beer brewer is locked into a high-maintenance relationship with yeast: those finicky, alcohol-creating microorganisms. In Episode 17 of Speaking of Chemistry, brewmaster Max Filter from Renegade Brewing Company fills us in on how he keeps his fermenting fungi happy. If this episode leaves you wanting more, read the sources below. Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly magazine of the American Chemical Society. Contact us at speakingofchem@acs.org! Subscribe to C&EN’s YouTube channel! Tapping Yeast’s Genome http://cenm.ag/brewing Volume 93 Issue 16 | pp. 8-13 Issue Date: April 20, 2015 Strange Brews: The Genes of Craft Beers http://www.nytimes.com/2014/05/27/science/craft-beer-at-the-genetic-level.html?_r=0 New York Times Web Date: May 26, 2014 What’s That Stuff: Beer http://cen.acs.org/articles/84/i14/Beer.html Volume 84 Issue 14 | p. 39 Issue Date: April 3, 2006
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Flexible hydrogels embrace rigid electronics
 
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Check out the full story on the chemistry behind these new hydrogel devices: http://cen.acs.org/articles/93/web/2015/12/Researchers-Hack-ElectronicsSurface-Chemistry-Bond.html For the scientific paper, visit Advanced Materials: http://onlinelibrary.wiley.com/doi/10.1002/adma.201504152/full
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Growing Induced Pluripotent Stem Cells
 
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Sravanti Kusuma, a graduate student in Bioengineering at Johns Hopkins University, shows some induced pluripotent stem cells and talks about handling them. Kusuma works for Professor Sharon Gerecht, Chemical and Biomolecular Engineering, Whiting School of Engineering, and affiliated with Johns Hopkins Institute for NanoBioTechnology. The Gerecht lab studies stem cells with the long-term goal of making blood vessels from stem cells, potentially for nourishing transplanted organs. Filmed and edited by Kirk Zamieroski
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Inside the Indian Generic Drug Manufacturer Cipla
 
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India produces over 30% of the world's entire supply of generic drugs. Cipla is one of India's largest drug manufacturers. It supplies antiretroviral drugs to about one third of AIDS patients under treatment in Africa. C&EN Senior Correspondent Jean-François Tremblay went inside Cipla's advanced pharmaceutical ingredient manufacturing plant to learn more about the stringent regulations it must follow. India's future as the world's drugstore is a controversial topic. Other drugmakers have been heavily fined, or had products recalled or banned, because of problems at plants. And India is under pressure to make its patent system more like those in western nations. But India has found a market for low-cost drugs and that market isn't about to disappear. More at http://cenm.ag/cpla Like C&EN? Want more chemistry video goodness? Subscribe to our YouTube channel: https://www.youtube.com/user/CENonline Subscribe to C&EN to watch science videos with a focus on chemistry, and to hear from the researchers behind it all. -- Looking for C&EN elsewhere on the internet? Homepage: http://cen.acs.org Facebook: http://www.facebook.com/CENews Twitter: http://www.twitter.com/cenmag Tumblr: http://cenwatchglass.tumblr.com
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Masking Boronic Acids for Suzuki Coupling
 
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Boronic acids are used in Suzuki coupling, but they have stability problems. In this video, Maureen Reilly, a graduate student in the Scott Rychnovsky lab, explains how to protect them with diethanolamine.
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Building a Jellyfish Mimic with Tissue Engineering
 
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For more information, go to http://cenm.ag/jelly. Researchers at Caltech and Harvard have made a polymer sheet that swims like a jellyfish. In this video, Janna Nawroth, a graduate student at Caltech, explains what inspired the team and talks about how the researchers optimized the design of their synthetic jellyfish with a printed protein and some rat heart cells. The researchers say that the jellyfish mimic could help them learn about jellyfish evolution or might even help them test cardiac drugs in the future.
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Ellipsometry for Studying Polymers
 
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Zahra Fakhraai is a polymer researcher in the Penn chemistry department.
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How can quantum computers change chemistry? — Speaking of Chemistry
 
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A growing band of scientists and tech giants are turning to quantum computers to solve some of chemistry’s currently intractable problems. ↓↓More info and references below↓↓ In this episode of Speaking of Chemistry, we look at how chemists and physicists want to use quantum computers, a new kind of machine that they hope can simulate and even predict molecules valuable for catalysis, materials science, and drug discovery. Read more: Chemistry is quantum computing’s killer app | C&EN https://cen.acs.org/articles/95/i43/Chemistry-quantum-computings-killer-app.html Quantum computing goes beyond hydrogen and helium | C&EN https://cen.acs.org/articles/95/i37/Quantum-computing-goes-beyond-hydrogen-and-helium.html Digitalization comes to the materials industry | C&EN https://cen.acs.org/articles/95/i39/Digitalization-comes-materials-industry.html Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets | Nature https://www.nature.com/articles/nature23879 Speaking of Chemistry is a production of Chemical & Engineering News (C&EN), the weekly news magazine of the American Chemical Society. Contact us at cen_multimedia@acs.org!
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The Chemistry of Cooking
 
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For more on kitchen chemistry classes, go to http://cenm.ag/cook. You're a chemist any time you step foot into the kitchen, says Matthew Hartings, a professor at American University, in Washington, D.C. In this clip, Hartings makes macaroni and cheese and talks about his class, "The Chemistry of Cooking," which is meant for undergraduates not majoring in science. He teaches the course with the goal of making chemistry more relevant and interesting to non-science majors.
Просмотров: 17195 CEN Online