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Spray-on Process Creates Bright, Efficient LEDs

Researchers have developed a process to make light-emitting diodes by spraying a substrate with quantum dots, according to a paper published in ACS Photonics. The quantum-dot LEDs (QLEDs) are 100 times as bright and efficient as similar devices, the researchers say. The process could someday be used to mass-produce inexpensive, vibrant, and flexible displays.

Quantum dots are semiconductor nanocrystals that emit a single wavelength when stimulated by electricity or light. This pure color can be tuned by changing the size or composition of the nanocrystals. In some electronic displays on the market today, quantum dots convert blue light from a conventional LED into red and green light, needed for a full-color display. But engineers want to make true QLED displays in which quantum dots at each pixel are electrically triggered to emit each of those three colors. Such displays should be rich, bright, and energy efficient. The question is how to make QLEDs on large areas.

A QLED contains quantum dots sandwiched between a layer that transports negatively charged electrons and one that transports positively charged holes. To make these various layers, researchers coat glass or plastic substrates with layers of charge-ferrying organic polymers and quantum dots using vacuum deposition or spin-coating. But the vacuum method is expensive and complicated, and it is difficult to make high-quality films over large areas with spin-coating. “These are not suitable for industry-scale production,” says Wenfa Xie, a professor of electronic science & engineering at Jilin University.

Illustration of a spray-on process for making light-emitting diodes

An ultrasonic spray nozzle deposits the various layers of a quantum dot LED onto a glass substrate.

Spraying is a much simpler and cheaper way to coat large areas, including flexible plastic sheets. So Xie, Hanzhuang Zhang, and their colleagues created prototype 5-mm2 QLEDs by spraying a series of three nanoparticle solutions onto a glass substrate, depositing one layer at a time. For this, they used an ultrasonic spray machine, which vibrates to break down a liquid into tiny droplets and releases them from a nozzle as an ultrafine spray.

The quantum dots were made of cadmium selenide-cadmium sulfide cores and zinc sulfide shells, which glow green when excited with electricity. Xie and his colleagues chose inorganic metal oxides as charge-transport layers instead of organic polymers because organic materials don’t last long under air and humidity and require expensive encapsulation. The team used zinc oxide nanoparticles for the electron-transporting layer and nickel oxide nanoparticles for the hole-transporting layer. To boost efficiency, Xie and his colleagues sprayed a layer of aluminum oxide between the nickel oxide and quantum dot layers, which helps to quash charge-trapping defect sites in the nickel oxide.

The team produced green QLEDs with an efficiency of 20.5 candelas per ampere and a brightness of more than 20,000 cd/m2. These numbers are two orders of magnitude greater than previously reported QLEDs made with all inorganic materials, Xie says. The process could easily be used to make QLEDs of other colors.

But the devices still need to catch up in brightness and lifetime with organic polymer-based QLEDs, which can be twice as efficient and last 10 times as long. Xie says that his team is now trying to improve both traits by engineering better quantum-dot and hole-transport layers.

Paul Holloway, a materials science & engineering professor at the University of Florida, says the spray process is unique for making QLEDs. Manufacturers would still need to figure out how to pattern the QLEDs to make pixels for displays, he adds, but there are many ways to do that.

This article is reproduced with permission from C&EN (© American Chemical Society). The article was first published on April 25, 2017.

Superbugs and Drug Resistance: An ACS Infectious Diseases Webinar

Bacteria are developing resistance to available antibiotics, and it has been 30 years since the discovery of a truly novel class of antibiotics for common Gram negative and positive pathogen. Scientists and health officials are worried we are losing the battle against drug-resistant bacteria, and they are sounding the alarm on super bugs and drug resistance.

ACS Infectious Diseases explored the topic in 2015 with a Special Issue titled “Gram-Negative Resistance.” Next month, the journal will host a free webinar on the subject with the Special Issue’s Guest Editor, Eric Brown, Professor in the Department of Biochemistry and Biomedical Sciences and member of the M.G. DeGroote Institute for Infectious Disease Research at McMaster University, and Deborah Hung, Co-Director of the Infectious Disease and Microbiome Program at the Broad Institute of MIT and Harvard, Associate Professor of Genetics at Harvard Medical School and Massachusetts General Hospital, and Associate Professor of Medicine at Brigham and Women’s Hospital.

The webinar “Superbugs and Drug Resistance: Challenges in New Antibiotic Discovery” will take place Monday, May 15, at 11 a.m. EDT and you can register now.

As a preview, we’re taking a look at the danger posed by superbugs and drug resistance and exploring some new treatments in development.

The Rise of Superbugs and Drug Resistance

Between August 2016 and March 2017, 10 infants in the neonatal intensive care unit at UC Irvine Medical Center in California were diagnosed with methicillin-resistant Staphylococcus aureus (MRSA) infections, the hospital said. Fortunately, all of the babies were treated and survived the infection.

In September 2016, a Nevada woman in her 70’s died from an infection with New Delhi metallo-beta-lactamase (NDM), a form of the bacterium Klebsiella pneumonia, which was resistant to all 26 antibiotics used in the U.S., reported the Centers for Disease Control in January. The woman had recently returned from an extended trip to India, and her illness became the latest U.S. case of carbapenem-resistant enterobacteria (CRE), which are typically the last resort class of antibiotics. The CDC has tracked about 175 cases of CRE in the U.S.

In the U.K., doctors are raising concerns about carbapenemase-producing Enterobacteriaceae (CPE), a nearly untreatable infection, reported The Guardian last week. “At least 81 people infected with CPE have died since 2009 at 66 NHS trusts in England,” found Freedom of Information requests made by the Bureau of Investigative Journalism, but CPE may have been a complicating factor, not the cause of death, in some cases. In 2015 there were nearly 2,000 cases of CPE in England – up from just three twelve years earlier, according to Public Health England. That might not be all, though, because hospitals are not required to report suspected cases.

In China, studies have found that drug-resistant Escherichia coli (E. coli) is a growing problem in the country’s hospitals. “The drug resistance gene known as mcr-1 — which can move from one bacterium to another — was found in about 1 percent of E. coli bacteria and 1 percent of a bacteria known as Klebsiella pneumoniae, that can cause pneumonia, bloodstream infections, and wound infections,” reported STAT in January. And China also has a serious problem with CREs.

WHO Lists Antibiotic-Resistant “Priority Pathogens”

Those are just a few recent examples of problems caused by drug-resistance around the word. In February, the World Health Organization (WHO) brought additional attention to the global problem when it published its first list of antibiotic-resistant “priority pathogens – 12 families of bacteria that pose a great threat to public health and require new antibiotics for treatment, to guide research and development of new antibiotics.

“Antibiotic resistance is growing, and we are fast running out of treatment options. If we leave it to market forces alone, the new antibiotics we most urgently need are not going to be developed in time,” said Marie-Paule Kieny, WHO Assistant Director-General for Health Systems and Innovation, upon the release of the list.

The list is separated into three groups, based on the level of need for new antibiotics: critical, urgent, and medium. The critical group is largely made up of bacteria that are resistant to multiple types of treatments and could affect hospitals, nursing homes, and facilities for patients who use certain medical devices. The high and medium urgency groups on the WHO list contain drug-resistant bacteria associated with more common illnesses.

Recent Research on Treating Drug-Resistant Bacteria

Researchers are looking everywhere for potential weapons against drug-resistant bacteria. At the University of Wisconsin-Madison, researchers are looking to apply CRISPR-Cas9 gene-editing technology to develop a probiotic pill that could target any bacteria doctors choose. If successful, the pill could be used to treat superbugs and less-lethal bacterial infections.

Scientists at Canada’s McGill University have found a way to reduce the overuse of antibiotics, which can help superbugs develop. An extract found in maple syrup can increase the effectiveness of antibacterial treatments. In some cases, they were able to reduce the volume of antibiotics by 97% and get the same results.

Komodo dragons are known for carrying deadly bacteria in their bite to kill prey. Researchers have analyzed the animals’ blood and identified 47 cationic antimicrobial peptides believed to have antimicrobial properties. From these, they believe they will find treatments for superbugs.

Learn more about the research on superbugs and antibiotic resistance from the ACS Infectious Diseases webinarSuperbugs and Drug Resistance: Challenges in New Antibiotic Discovery” on May 15. Register today!

4 Keys to Writing a Highly-Read Chemistry Research Paper

You spent a lot of time on your research, and now it is time to describe those findings to the scientific community. You know your work is important, but how do you make it stand out? To help answer this question, we asked ACS Editors, staff, and 2016’s most-read author to share their thoughts on the essential elements of a highly-read chemistry research paper. Here are a few tips to make sure your next chemistry research paper attracts the maximum amount of attention.

A Highly-Read Chemistry Research Paper Tells a Story

Your paper should be about more than data points and methods if you want to attract more readers. Your research needs to tell a story that will grab and hold readers’ attention.

“A paper should have a gripping narrative about why you undertook this piece of research. (What were you trying to prove? How is this an advancement over the state of the art?), the setbacks or learning moments you had along the way, and where the data took you in the end,” says Dr. Stefano Tonzani, Executive Editor, ACS Omega.

Telling a good story invests the reader into your research. Once they find themselves interested in how it begins, they will want to learn how it ends.

A Highly-Read Chemistry Research Paper Has a Hook

A timely research topic will go a long way to ensuring your paper is highly read. If your work covers an emerging research topic, such as the Zika virus, or a subject that affects large amounts of people, such as climate change, it’s more likely to attract attention. Other elements that can increase the number of people reading your research can include a  human interest angle or a novel method.

Dr. Prashant Kamat, Editor-in-Chief, ACS Energy Letters, suggests a simple fix to help your paper stand out: Having an engaging title. With so many research papers out there, an appealing title is important. “The shorter the title, the better,” he says. He goes on to say, “An important step in writing the paper is to come up with an attractive title that will appeal to a broad readership. The title should be simple, effective, and accurately reflect the content of the paper. If you are submitting a paper to a physical chemistry journal, avoid using phrases such as SynthesisDevice Fabrication, or Application in the title as they imply the focus of the paper is highly specialized in nature. You should also avoid descriptive words such as study, investigation, or demonstration because they can undermine the uniqueness of the study. Similarly, avoid adjectives such as Significant EnhancementHighly EfficientNovelFacile, or Green unless you have a major finding that conclusively supports the claim.”

Visual elements are also key to holding a reader’s attention. Dr. Kamat suggests that you have attractive images and figures in your paper to break up the text and make the overall experience visually appealing.

A Highly-Read Chemistry Research Paper is Accessible

If you want to reach a lot of readers, you need to make your work accessible to them. One way to do this is to make your work open access, or free for anyone to read.

“At ACS Energy Letters, 13 out of the 20 most read articles are open access,” says Dr. Kamat, suggesting that accessibility is key to broader dissemination and readership.

Dr. Tonzani agrees that open access is important for a research paper. “In regards to my open access journal, ACS Omega, roughly half of the readers are working in industry or ingesting our research at places other than universities and companies that subscribe to ACS journals. Thus you can have an immediate doubling of the possible audience for your paper.”

At ACS Publications, we offer flexible open access options on all ACS Journals under an ACS AuthorChoice license. With multiple discounts available, including a 50% ACS Membership discount, it’s more affordable than ever to open up your research to the world. Through the end of the year, researchers may also use their ACS Author Rewards to cover the cost of open access fees.

A Highly-Read Chemistry Research Paper Gets Promoted

Don’t be afraid to seek out readers. Once you’ve gotten published, it’s time to reach out to potential audiences and tell them about your work. There is a world of people out there who find your research interesting. They just need to hear about it.

“It’s important to take the time to help a general audience understand the bigger picture of whatever you do, and reaching out through social and local media sources is imperative,” says Dr. Jacqueline Fries, Formulation Scientist at CoreRx, Inc. and 2016’s Most-Read Author in an ACS Publications journal.

She and fellow researchers used an extract from a sponge found in Antarctica to create a new chemical that killed 98% of MRSA cells in laboratory tests. They call the chemical “darwinolide.” Dr. Fries says it is important that the public is made aware of this research, which is why they made every effort to use key communication channels to spread the word.

“We did this by doing an AMA on Reddit, posting on Facebook, doing interviews with local media, and eventually being contacted by national media such as Wired Magazine and National Geographic,” she says.

The public outreach helped attract attention to the work, and allowed her to communicate “that darwinolide is just a small step in the right direction for antibiotics research.” That effort paid off, as it certainly contributed to making her research paper the most-read of 2016.

Are you looking for more helpful tips on publishing highly-read chemistry research paper? Check out our Top 10 Poster Presentation Tips. Or, click through to read tips from ACS Editors on how to master the art of scientific publication.

What Chemists Do: Dow Chemical Company’s Andrea Greyson

Andrea Greyson is the Technical Sales Service Manager for Industrial Coatings at The Dow Chemical Company. Industrial coatings are an integral part of keeping machinery in service for longer.

Watch Andrea’s interview as she explains the challenges of working in this segment of the chemical industry, and the excitement of getting a product into customers’ hands.

Learn more about the various industry member programs at the American Chemical Society.

ACS Editors’ Choice: Astronomical Molecules — and More!

This week: Astronomical molecules, new approaches to drug design, bioinspired smart materials for directional liquid transport — and more!

Each and every day, ACS grants free access to a new peer-reviewed research article from one of the Society’s journals. These articles are specially chosen by a team of scientific editors of ACS journals from around the world to highlight the transformative power of chemistry. Access to these articles will remain open to all as a public service.

Check out this week’s picks!
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Fragment-Based, Structure-Enabled Discovery of Novel Pyridones and Pyridone Macrocycles as Potent Bromodomain and Extra-Terminal Domain

J. Med. Chem., Article ASAP
DOI: 10.1021/acs.jmedchem.7b00017
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Structure and Spectroscopic Properties of [Mg,C,N,O] Isomers: Plausible Astronomical Molecules

ACS Earth Space Chem., Article ASAP
DOI: 10.1021/acsearthspacechem.7b00019
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The Root Growth-Regulating Brevicompanine Natural Products Modulate the Plant Circadian Clock

ACS Chem. Biol., Article ASAP
DOI: 10.1021/acschembio.6b00978
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Bioinspired Smart Materials for Directional Liquid Transport

Ind. Eng. Chem. Res., Article ASAP
DOI: 10.1021/acs.iecr.7b00583
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Singlet Oxygen Generation with Chemical Excitation of an Erythrosine–Luminol Conjugate

ACS Omega, 2017, 2 (4), pp 1367–1371
DOI: 10.1021/acsomega.7b00228
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Packaged and Free Satellite Tobacco Mosaic Virus (STMV) RNA Genomes Adopt Distinct Conformational States

Biochemistry, Article ASAP
DOI: 10.1021/acs.biochem.6b01166
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Subcellular Chemical Imaging of Antibiotics in Single Bacteria Using C60-Secondary Ion Mass Spectrometry

Anal. Chem., Article ASAP
DOI: 10.1021/acs.analchem.7b00466
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Love ACS Editors’ Choice? Get a weekly e-mail of the latest ACS Editor’s Choice articles and never miss a breakthrough!

2017 ACS Applied Materials & Interfaces Young Investigator Award Winner Announced

ACS Applied Materials & Interfaces, in partnership with the ACS Division of Colloid & Surface Chemistry, is pleased to announce the selection of Professor Yanli Zhao of Nanyang Technological University, as the winner of the 2017 ACS Applied Materials & Interfaces Young Investigator Award.

Professor Zhao was selected for this Award for development of advanced multifunctional nanomaterials for application in cancer therapy and diagnostics.

We recently spoke with Professor Zhao to get his thoughts on this Award, his current research, and his advice for young researchers.

How did you become interested in materials science and how did your career progress?

My research background was supramolecular chemistry by training. In particular, I conducted cyclodextrin-based molecular recognition and self-assembly during my PhD studies, and the fabrication of switchable rotaxanes and catenanes in my postdoctoral research. During my postdoctoral studies, I had great opportunities to work in collaborations with some excellent materials scientists, and I became interested in integrating supramolecular chemistry with materials chemistry. After I joined Nanyang Technological University Singapore to start my independent academic career in 2010, I decided to take self-assembled nanosystems as my major research direction in my research team. While carrying out interdisciplinary research is always challenging, I have been fortunate to have talented graduate students and research fellows working with me, achieving some exciting results in the fields of nanomedicine as well as gas capture and catalytic conversion.

You undertook your postdoctoral research under one of the joint 2016 Nobel Laureates in Chemistry, Professor Sir Fraser Stoddart. How was that experience, and what’s the most significant learning experience from your time working with him?

Working with Fraser changed my life, and it is the most remarkable and memorable experience for me. I met Fraser during a cyclodextrin conference in Nankai University China in May 2005, right before my PhD oral defense. When I asked him for a postdoctoral position in his group, he quickly accepted my request. Over the years working with Fraser, I learned how to rationally design research projects, write scientific proposals, supervise students, polish manuscripts, deliver oral presentations, and many more. The most significant learning experience from him is working with students with great care and patience, and being supportive to their careers. After working with Fraser for several days and nights in order to finish my remaining manuscripts before my leaving for Nanyang Technological University in 2010, an important piece of advice from him was to choose a research topic different from my original research to start an independent academic career.

Could you give us a short overview of the research you’re currently undertaking?

Our group in Nanyang Technological University conducts research in an interdisciplinary area of applied chemistry and materials with an emphasis on the design, synthesis, and applications of integrated nanosystems for targeted bioimaging and therapy as well as for gas capture and conversion. I have outlined an independent blueprint for the research program that leverages my experiences in synthetic chemistry and advanced materials. For nanomedicine, our research has innovatively discovered therapeutic platforms that can simultaneously target diseased cells, enable the location to be imaged by optical methods, and release therapeutic drugs to the diseased cells by commands. The approach paves the way for developing the next generation of therapeutics in cancer therapy. For gas capture and separation, we have tackled an environmentally important matter of using cost-effective porous materials to selectively capture CO2 from polluted air, followed by catalytic conversion of CO2 into some value-added chemicals and materials. In particular, we have innovatively incorporated nitrogen-rich units into porous materials that exhibit enhanced CO2 capture capability and selectivity. A laboratory-scale prototype facility using the developed nitrogen-rich porous materials has been home-designed and set up by us for high-performance CO2 capture and conversion.

What advice do you have for young scientists who are just starting out in their career and want to make an impact?

My personal experience rather than advice is to spend some time to come up with a new idea or something more creative by integrating your previous research experiences with a different area. Be prepared to fine-tune the topic based on the research progress, and summarize the experimental results timely. Do not get too disappointed when the outcome is negative, and always be optimistic to work toward the goal.

Is there anything else you’d like to share?

I would like to take this special opportunity to thank the former and current group members as well as our collaborators for their great contributions. I also would like to thank Nanyang Technological University for providing me with excellent research platforms and administrative supports. The last but not the least, I would express my great appreciation to my family for their consistent support to my academic career.

View selected articles published by Yanli Zhao in ACS Publications:

Understanding Pathway Complexity of Organic Micro/Nanofiber Growth in Hydrogen-Bonded Coassembly of Aromatic Amino Acids
ACS Nano, Articles ASAP (As Soon As Publishable)
DOI: 10.1021/acsnano.7b01161

Tuning Synergistic Effect of Au-Pd Bimetallic Nanocatalyst for Aerobic Oxidative Carbonylation of Amines
Chem. Mater., Just Accepted
DOI: 10.1021/acs.chemmater.7b00544

Halogen-Assisted Piezochromic Supramolecular Assemblies for Versatile Haptic Memory
J. Am. Chem. Soc., 2017, 139 (1), pp 436–441
DOI: 10.1021/jacs.6b11057

Anticancer Effect of α-Tocopheryl Succinate Delivered by Mitochondria-Targeted Mesoporous Silica Nanoparticles
ACS Appl. Mater. Interfaces, 2016, 8 (50), pp 34261–34269
DOI: 10.1021/acsami.6b13974

Emerging Applications of Metal–Organic Frameworks and Covalent Organic Frameworks
Chem. Mater.
, 2016, 28 (22), pp 8079–8081
DOI: 10.1021/acs.chemmater.6b04677

Photopolymerization of Diacetylene on Aligned Multiwall Carbon Nanotube Microfibers for High-Performance Energy Devices
ACS Appl. Mater. Interfaces, 2016, 8 (48), pp 32643–32648
DOI: 10.1021/acsami.6b12171

Dual-Responsive Carbon Dots for Tumor Extracellular Microenvironment Triggered Targeting and Enhanced Anticancer Drug Delivery
ACS Appl. Mater. Interfaces, 2016, 8 (29), pp 18732–18740
DOI: 10.1021/acsami.6b06695

Professor Zhao will be honored at a special award symposium which will be held on Tuesday, August 22, 2017 at the Fall ACS Meeting in Washington, DC as part of the Colloid Division (COLL) program. We hope to see you there!

 

Enjoy Free Open Access Articles from the Journal of Agricultural and Food Chemistry for Earth Day

The Journal of Agricultural and Food Chemistry publishes high-quality, cutting-edge original research representing complete studies and research advances focusing on the chemistry and biochemistry of agriculture and food. The journal also encourages papers with chemistry and/or biochemistry as a major component combined with biological/sensory/nutritional/toxicological evaluation related to agriculture and/or food.

The Journal of Agricultural and Food Chemistry is headed by Dr. Thomas F. Hofmann (Technische Universität München), a leader in the field of taste perception, and is supported by an international team of Associate Editors with expertise across agricultural & food chemistry. The journal is the most-cited in the categories of Food Science & Technology, Chemistry, Applied and Agriculture, Multidisciplinary, according to the 2015 Thomson Reuters journal citation reports.

Enjoy these Free Open Access Articles from the Journal of Agricultural and Food Chemistry:

Development of a QuEChERS-Based Method for the Simultaneous Determination of Acidic Pesticides, Their Esters, and Conjugates Following Alkaline Hydrolysis

J. Agric. Food Chem., 2017, 65 (6), pp 1296–1305
DOI: 10.1021/acs.jafc.6b05407

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Comprehensive Analysis of the Value of Single Versus Multiple Year (Season) Crop Residue Data for Establishment of Maximum Residue Levels (MRLs)

J. Agric. Food Chem., 2017, 65 (8), pp 1784–1791
DOI: 10.1021/acs.jafc.6b05106

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Harnessing Insect–Microbe Chemical Communications To Control Insect Pests of Agricultural Systems

J. Agric. Food Chem., 2017, 65 (1), pp 23–28
DOI: 10.1021/acs.jafc.6b04298
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Sulfoglucosides as Novel Modified Forms of the Mycotoxins Alternariol and Alternariol Monomethyl Ether

J. Agric. Food Chem., 2016, 64 (46), pp 8892–8901
DOI: 10.1021/acs.jafc.6b03120

Celebrate Earth Day 2017 with Resources from the Journal of Chemical Education

Chemists Celebrate Earth Day is an ACS annual event for bringing international focus to environmental topics, such as clean air, water, and energy, to illustrate the positive role chemistry plays in understanding and preserving the Earth. In honor of Earth Day 2017, the Journal of Chemical Education is highlighting content related to the CCED 2017 theme “Chemistry Helps Feed the World”.

The articles, activities, and laboratory experiments listed below provide ideas and suggestions for bringing environmental chemistry to students on agricultural & food chemistry, agrochemicals, and soil and water. Environmental chemistry engages students of all levels in learning new chemistry concepts by relating chemistry to their daily lives as well as triggering awareness of environmental issues. With 94 volumes of interesting material including a wide variety of environmental chemistry topics, it is easy to connect the classroom experience to the greater world through the Journal of Chemical Education.

Agricultural & Food Chemistry

Demonstrating the Effect of Surfactant on Water Retention of Waxy Leaf Surfaces
Journal of Chemical Education 2017 94 (2), 230-234
DOI: 10.1021/acs.jchemed.6b00546
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Citrus Quality Control: An NMR/MRI Problem-Based Experiment
Journal of Chemical Education 2016 93 (2), 335-339
DOI: 10.1021/acs.jchemed.5b00251
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Detection of the cp4 epsps Gene in Maize Line NK603 and Comparison of Related Protein Structures: An Advanced Undergraduate Experiment
Journal of Chemical Education 2015 92 (7), 1229-1232
DOI: 10.1021/ed500655j
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Touring the Tomato: A Suite of Chemistry Laboratory Experiments
Journal of Chemical Education 2013 90 (3), 368-371
DOI: 10.1021/ed3004148
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Mushroom Magic: Analysis of Metals in a Familiar Food
Journal of Chemical Education 2012 89 (1), 114-116
DOI: 10.1021/ed200336q
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The Grapes of Class: Teaching Chemistry Concepts at a Winery
Journal of Chemical Education 2012 89 (10), 1264-1266
DOI: 10.1021/ed300158c

Agrochemicals

Fertilizers, Then and Now
Journal of Chemical Education 2010 87 (2), 135-138
DOI: 10.1021/ed8000683
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Reducing the Use of Agrochemicals: A Simple Experiment
Journal of Chemical Education 2006 83 (2), 245
DOI: 10.1021/ed083p245
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Operation Allelopathy: An Experiment Investigating an Alternative to Synthetic Agrochemicals
Journal of Chemical Education 2014 91 (4), 570-574
DOI: 10.1021/ed4000074
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Project-Based Learning in Undergraduate Environmental Chemistry Laboratory: Using EPA Methods To Guide Student Method Development for Pesticide Quantitation
Journal of Chemical Education 2017 94 (4)
DOI: 10.1021/acs.jchemed.6b00352
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Liquid–Liquid Extraction of Insecticides from Juice: An Analytical Chemistry Laboratory Experiment
Journal of Chemical Education 2013 90 (4), 483-486
DOI: 10.1021/ed300389p
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Soil & Water

Soil Testing: Dig In!
Journal of Chemical Education 2006 83 (2), 240A
DOI: 10.1021/ed083p240A
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Chemists Celebrate Earth Day 2006: Dig It! JCE Resources for Chemistry and Soils
Journal of Chemical Education 2006 83 (2), 199
DOI: 10.1021/ed083p199
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Chemical Analysis of Soils: An Environmental Chemistry Laboratory for Undergraduate Science Majors
Journal of Chemical Education 1999 76 (12), 1693
DOI: 10.1021/ed076p1693
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Using Artificial Soil and Dry-Column Flash Chromatography To Simulate Organic Substance Leaching Process: A Colorful Environmental Chemistry Experiment
Journal of Chemical Education 2012 89 (2), 248-253
DOI: 10.1021/ed100728j
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Water Filtration
Journal of Chemical Education 2004 81 (2), 224A
DOI: 10.1021/ed081p224A
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A Miniature Wastewater Cleaning Plant to Demonstrate Primary Treatment in the Classroom
Journal of Chemical Education 2015 92 (11), 1889-1891
DOI: 10.1021/acs.jchemed.5b00291
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“Will It Rain?” Activities Investigating Aerosol Hygroscopicity and Deliquescence
Journal of Chemical Education 2015 92 (4), 672-677
DOI: 10.1021/ed5004977

Celebrate Earth Day By Testing Your Environmental I.Q.

Chemistry is important to the past, present, and future of the modern environmental movement. Many of today’s thorniest environmental problems have their roots in the work of earlier generations of chemists. But if chemistry has sometimes been part of creating ecological problems, it is absolutely essential to humanity’s efforts to solve them. That’s why the American Chemical Society supports programs such as Chemists Celebrate Earth Day, which creates connections between the chemistry community, environmental activists, and the general public.

Take our quiz to uncover your Environmental I.Q. and learn how chemists can get involved with Earth Day.


Test Your Eco I.Q. With the ACS!
Test Your Eco I.Q.
Happy Earth Day 2017! Test your knowledge of recent advancements in environmental science, sustainable chemistry, agricultural and food chemistry, chemistry education, and more with this quiz from ACS Publications.
Chemists can do all these things and more. Learn more about Chemists Celebrate Earth Day activities from the American Chemical Society.
Learn more about the effects of elevated carbon dioxide levels on seawater chemistry in Journal of Chemical Education.
Read more about 2016 emissions levels in C&EN.
Learn more about this research in Journal of Agricultural and Food Chemistry.
Learn more about the latest in battery recycling in ACS Sustainable Chemistry & Engineering.
Rachel Carson’s 1962 book “Silent Spring” detailed harms caused by certain pesticides, spurring a wave of activism that led to the modern environmental movement.
Read more about the research in Environmental Science & Technology Letters.
2016 was the third global “warmest year” in a row, according to NASA.
Learn more about the cause of the crisis in Environmental Science & Technology.
The U.S. has celebrated Earth Day each year since 1970.


Using Ultraflexible Transparent Film to Improve Heat Therapy

To soothe aches and pains, many people turn to heating pads, patches or creams. Although a common practice, thermotherapy can cause burns. Now researchers are developing a transparent heating pad that allows users to see through it to monitor their skin’s color and prevent such injuries.

Watch a video on transparent heating pads:

Read the full paper from ACS Applied Materials & Interfaces:

Ultraflexible Transparent Film Heater Made of Ag Nanowire/PVA Composite for Rapid-Response Thermotherapy Pads

ACS Appl. Mater. Interfaces, 2017, 9 (7), pp 6644–6651
DOI: 10.1021/acsami.6b16853