These are organized by a classification scheme developed exclusively for Cosma. More…
NIST Chemistry WebBook
Physical and Chemical Properties Resources (UC Berkeley Physics and Astronomy Library)
CRC Handbook of Chemistry and Physics Online (99th Edition)
ChemSpider: Free Chemical Structure Database
Chemistry Calculators (Calculator.com)
matter : material substance that occupies space, has mass, and is composed predominantly of atoms consisting of protons, neutrons, and electrons, that constitutes the observable universe, and that is interconvertible with energy — Webster
Matter is any substance that has mass and takes up space by having volume. All everyday objects that we can touch are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, “matter” generally includes atoms and anything made up of them, and any particles (or combination of particles) that act as if they have both rest mass and volume. However it does not include massless particles such as photons, or other energy phenomena or waves such as light or sound.
Matter exists in various states (also known as phases). These include classical everyday phases such as solid, liquid, and gas – for example water exists as ice, liquid water, and gaseous steam – but other states are possible, including plasma, Bose–Einstein condensates, fermionic condensates, and quark–gluon plasma.
Usually atoms can be imagined as a nucleus of protons and neutrons, and a surrounding “cloud” of orbiting electrons which “take up space”. However this is only somewhat correct, because subatomic particles and their properties are governed by their quantum nature, which means they do not act as everyday objects appear to act – they can act like waves as well as particles and they do not have well-defined sizes or positions.
In the Standard Model of particle physics, matter is not a fundamental concept because the elementary constituents of atoms are quantum entities which do not have an inherent “size” or “volume” in any everyday sense of the word. Due to the exclusion principle and other fundamental interactions, some “point particles” known as fermions (quarks, leptons), and many composites and atoms, are effectively forced to keep a distance from other particles under everyday conditions; this creates the property of matter which appears to us as matter taking up space. — Wikipedia
Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds. Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. — Wikipedia
Journal of the American Chemical Society: Latest Articles (ACS Publications) latest articles published in Journal of the American Chemical Society
- [ASAP] Capturing the Complete Reaction Profile of...by David Gygi, Miguel I. Gonzalez, Seung Jun Hwang, Kay T. Xia, Yangzhong Qin, Elizabeth J. Johnson, François Gygi, Yu-Sheng Chen, and Daniel G. Nocera on April 16, 2021 at 4:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c02630
- [ASAP] A Bioinspired Disulfide/Dithiol Redox...by Shao-An Hua, Lucas A. Paul, Manuel Oelschlegel, Sebastian Dechert, Franc Meyer, and Inke Siewert on April 16, 2021 at 4:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c01763
- [ASAP] Host–Guest Induced Peptide Folding with...by David E. Clarke, Guanglu Wu, Ce Wu, and Oren A. Scherman on April 16, 2021 at 4:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c00342
- [ASAP] Mediator-Enabled Electrocatalysis with...by Benjamin R. Walker, Shuhei Manabe, Andrew T. Brusoe, and Christo S. Sevov on April 16, 2021 at 4:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c02103
- [ASAP] A Helicase Unwinds Hexanucleotide Repeat...by Honghe Liu, Yu-Ning Lu, Tapas Paul, Goran Periz, Michael T. Banco, Adrian R. Ferré-D’Amaré, Jeffrey D. Rothstein, Lindsey R. Hayes, Sua Myong, and Jiou Wang on April 15, 2021 at 4:00 am
Journal of the American Chemical SocietyDOI: 10.1021/jacs.1c00131
Nature Chemistry Nature Chemistry is a monthly journal dedicated to publishing high-quality papers that describe the most significant and cutting-edge research in all areas of chemistry. As well as reflecting the traditional core subjects of analytical, inorganic, organic and physical chemistry, the journal features a broad range of chemical research including, but not limited to, bioinorganic and bioorganic chemistry, catalysis, computational and theoretical chemistry, environmental chemistry, green chemistry, medicinal chemistry, organometallic chemistry, polymer chemistry, supramolecular chemistry and surface chemistry. Other multidisciplinary topics such as nanotechnology, chemical biology and materials chemistry are also featured.
- A three-shell supramolecular complex enables the...by Ernest Ubasart on April 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 April 2021; doi:10.1038/s41557-021-00658-6A supramolecular three-shell matryoshka-like complex di rects the functionalization of the C60 inner shell to the selective formation of a single trans-3 fullerene bis-adduct. The selectivity with this matryoshka-like approach could be useful for applications where regioisomerically pure C60 bis-adducts have been shown to have superior properties compared with isomer mixtures.
- A far-red hybrid voltage indicator enabled by...by Shuzhang Liu on April 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 April 2021; doi:10.1038/s41557-021-00641-1Voltage imaging is a powerful technique for studying electrical signalling in neurons. A palette of bright and sensitive voltage indicators has now been developed via enzyme-mediated ligation and Diels–Alder cycloaddition. Among these, a far-red indicator faithfully reports neuronal action potential dynamics with an excitation spectrum orthogonal to optogenetic actuators and green/red-emitting biosensors.
- Aromatic hydrocarbon beltsby Qing-Hui Guo on April 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 April 2021; doi:10.1038/s41557-021-00671-9Aromatic hydrocarbon belts consisting of fully fused benzenoid rings have fascinated scientists for over half a century. This Review revisits the protracted historical background of these compounds and features some recent breakthroughs in their rational design and synthesis, including the challenges faced in the precise synthesis of carbon-rich materials such as single-walled carbon nanotubes.
- Magnetic ordering through itinerant...by Jesse G. Park on April 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 April 2021; doi:10.1038/s41557-021-00666-6The development of metal–organic magnets that combine tunable magnetic properties with other desirable physical properties remains challenging despite numerous potential applications. Now, a mixed-valent chromium–triazolate material has been prepared that exhibits itinerant ferromagnetism with a magnetic ordering temperature of 225 K, a high conductivity and large negative magnetoresistance (23%).
- Cellular uptake of large biomolecules enabled by...by Anselm F. L. Schneider on April 15, 2021 at 12:00 am
Nature Chemistry, Published online: 15 April 2021; doi:10.1038/s41557-021-00661-xRobust delivery of proteins into cells is challenging, but it has now been shown that by conjugating arginine-rich cell-penetrating peptides to the surface of cells, proteins containing a cell-penetrating peptide can be delivered efficiently into them. Using a thiol-reactive cell-penetrating peptide enables thiol-containing proteins to be delivered by simple co-incubation.
Geochemistry News -- ScienceDaily Earth and Climate Chemistry. Full text articles on organic and inorganic chemistry in the environment. Updated daily.
- Wearable sensors that detect gas leakson April 16, 2021 at 7:50 pm
A research team has developed wearable gas sensors that display an instantaneous visual holographic alarm.
- Experiments cast doubts on the existence of...on April 16, 2021 at 4:00 pm
A quantum spin liquid is a state of matter in which interacting quantum spins do not align even at lowest temperatures, but remain disordered. Research on this state has been going on for almost 50 years, but whether it really exists has never been proven beyond doubt. An international team has now put an end to the dream of a quantum spin liquid for the time being. Nevertheless, the matter remains exciting.
- Process simultaneously removes toxic metals and...on April 15, 2021 at 6:28 pm
Removing salt is only one step in creating clean water from ocean or brackish water. Toxic compounds, from metals to human-made carcinogens, must be removed by subsequent processing. Chemists have invented a technique to remove salt and toxic ions in one step. They create porous nanoparticles, PAFs, with added functional groups that selectively absorb ionic compounds, like metals, or neutral species, like boron, then add them to the polymer membranes used in electrodialysis.
- The whitest paint is here -- and it's the...on April 15, 2021 at 6:18 pm
In an effort to curb global warming, engineers have created the whitest paint yet. Coating buildings with this paint may one day cool them off enough to reduce the need for air conditioning, the researchers say.
- Water purification system engineered from wood,...on April 15, 2021 at 5:31 pm
Researchers have developed a more eco-friendly way to remove heavy metals, dyes and other pollutants from water. The answer lies in filtering wastewater with a gel material taken from plant cellulose and spiked with small carbon dots produced in a microwave oven.
Scientific American - Chemistry Science news and technology updates from Scientific American
- How Quantum Computing Could Remake Chemistryby Jeannette Garcia on March 15, 2021 at 2:00 pm
It will bring molecular modeling to a new level of accuracy, reducing researchers’ reliance on serendipity -- Read more on ScientificAmerican.com
- Ketchup Is Not Just a Condiment: It Is Also a...by H. Joachim Schlichting on March 12, 2021 at 11:45 am
Everybody’s favorite red sauce may be thin or thick, depending on how it is handled -- Read more on ScientificAmerican.com
- Even Tiny Phytoplankton Have Microbiomesby Leslie Nemo on February 19, 2021 at 5:00 pm
These algae exchange vital chemicals with bacteria that live around their surface -- Read more on ScientificAmerican.com
- Remembering the Extraordinary Scientist Paul...by Jan Zalasiewicz, Colin Waters, Will Steffen on February 5, 2021 at 12:00 pm
Among other things, he explored the concept of nuclear winter, won a Nobel for his role in helping understand atmospheric ozone depletion and coined the term “Anthropocene” -- Read more on ScientificAmerican.com
- Newly Studied Proteins Expand CRISPR's Editing...by Niko McCarty on February 1, 2021 at 11:45 am
A catalog of Cas9 proteins could provide gene-editing variety -- Read more on ScientificAmerican.com
Chemistry News - Biochemistry, Polymers, Materials Science The latest news stories on chemistry, biochemistry, polymers, materials science from Phys.org
- Process simultaneously removes toxic metals and...on April 15, 2021 at 6:00 pm
University of California, Berkeley, chemists have discovered a way to simplify the removal of toxic metals. like mercury and boron. during desalination to produce clean water, while at the same time potentially capturing valuable metals, such as gold.
- The whitest paint is here—and it's the coolest....on April 15, 2021 at 6:00 pm
In an effort to curb global warming, Purdue University engineers have created the whitest paint yet. Coating buildings with this paint may one day cool them off enough to reduce the need for air conditioning, the researchers say.
- Plastics could see a second life as biodegradable...on April 15, 2021 at 4:58 pm
Scientists at the Institute for Cooperative Upcycling of Plastics (iCOUP), an Energy Frontier Research Center led by Ames Laboratory, have discovered a chemical process that provides biodegradable, valuable chemicals, which are used as surfactants and detergents in a range of applications, from discarded plastics. The process has the potential to create more sustainable and economically favorable lifecycles for plastics.
- Water purification system engineered from wood,...on April 15, 2021 at 4:02 pm
Researchers in Sweden have developed a more eco-friendly way to remove heavy metals, dyes and other pollutants from water. The answer lies in filtering wastewater with a gel material taken from plant cellulose and spiked with small carbon dots produced in a microwave oven.
- Starving tuberculosis of sugars may be a new way...on April 15, 2021 at 2:12 pm
Tuberculosis is a devastating disease that claims over 1.5 million lives each year. The increase in TB cases that are resistant to the current antibiotics means that novel drugs to kill Mycobacterium tuberculosis (Mtb) are urgently needed. Researchers from the University of Warwick have successfully discovered how Mycobacterium tuberculosis uses an essential sugar called trehalose, which provides a platform to design new and improved TB drugs and diagnostic agents.