Sentences with phrase «by organic molecules»

The terbium is surrounded by organic molecules that shield it against external impacts.

Meyer, a chemist at University of North Carolina at Chapel Hill and director of its Energy Frontier Research Center in Solar Fuels, noticed that two separate groups of researchers working on two separate parts of the photosynthetic reaction happened to be using the same class of catalyst — ones with an atom of the metal ruthenium surrounded by organic molecules.

A typical MOF consists of a metal oxide center surrounded by organic molecules that form a highly porous three - dimensional crystal framework.

MOFs are microscopic - scale porous crystals engineered from metal ions bound together by organic molecules called ligands.

Not exact matches

More amazingly, we now know that beneath the crust of Enceladus is a global ocean of liquid saltwater and organic molecules, all being heated by hydrothermal vents on the seafloor.

It is now well known that vast amounts of water and over 120 molecules, including complex organic molecules, are found in interstellar space, having been created by stars and nebulae (the Orion Nebula alone churns out huge amounts of water).

«What we have described as globalization is remarkably close to Teilhard de Chardin's planetization, in which «[mankind, born on this planet and spread over its entire surface, come [s] gradually to form round its earthly matrix, a single, major, organic unity, enclosed upon itself.4 Thus the globalization of humankind could lead to the formation of a new kind of living entity — a social organism — on the same cosmic principle as that by which atoms join to form molecules, molecules join to form mega-molecules, mega-molecules unite to form living cells, and innumerable cells constitute an organism.

The apparent gap between nonliving and living has now been bridged by nucleic acids, a class of polymeric organic molecules composed of a succession of small units (nucleotides) of four sorts, the order of which determines an indefinitely large number of different specificities.

Spontaneous self - organization is invoked by biochemists in the evolution of the prebiotic world in which a variety of atoms assembled into organic molecules eventually giving rise to molecules of RNA, DNA and proteins which led to further complex assemblies and eventually to cells.

One of the key clues will be the presence or lack of complex organic compounds — molecules featuring carbon that are both ingredients for life and potential by - products of it.

By replacing these materials with carbon - based or organic molecules, the research team led by post-doctoral pursued a fundamentally different approacBy replacing these materials with carbon - based or organic molecules, the research team led by post-doctoral pursued a fundamentally different approacby post-doctoral pursued a fundamentally different approach.

To try to develop a more sensitive probe for isolating individual peptides — short strands of amino acids — from a pool of similar molecules, a team led by chemist Clark Still of Columbia University 4 years ago synthesized small organic compounds that selectively fish out peptides dissolved in chloroform.

They linked the subunits with clusters of zinc acetate to create a scaffold riddled with wide channels, then soaked the crystals in various large organic molecules to test their sponginess and ability to sort by size.

A prototype metal - free flow battery developed by engineer Michael Aziz and colleagues at Harvard University relies on the electrochemistry of naturally abundant, small organic molecules to store electricity generated from renewable, intermittent energy sources.

With ALMA, an international team lead by Yoko Oya, a graduate student of Department of Physics, The University of Tokyo, and Nami Sakai, an associate chief scientist of RIKEN, studied the distribution of various organic molecules around a Solar - type protostar IRAS 16293 - 2422A at a high spatial resolution.

One of those studies, led by Brown geologist Peter Schultz and published last year, found organic molecules and even plant matter entombed in glass formed by an impact that occurred millions of years ago in Argentina.

Geneticists and information scientists have built and are building models for the transition of organic molecules to self - replicating living organisms, based on theories of Earth's early development provided by astronomers, geologists, and oceanographers and on the evidence of fossilized microorganisms discovered by paleontologists.

Or molecules can flow through «carbon dioxide highways» created by adjacent metal - organic frameworks.

The Methods: Photochemical modeling by a Caltech team indicates that ethane, a hydrocarbon detected on Titan by both of the Voyager spacecraft and the European Infrared Space Observatory, is created when solar ultraviolet light breaks down methane, a minor component of Titan's nitrogen - rich atmosphere, into a stew of organic molecules that form a dense orange - brown smog.

When I was at Bell Labs, I was surrounded by amazing organic chemists who could cook up all kinds of interesting polymers and organic molecules that we could use to build transistors.

The team traced the molecules found in these air samples to their original sources using databases that show the specific volatile organic compounds released by specific products.

They began by coating one AFM tip with an ink consisting of 16 - mercaptohexadecanoic acid (MHA), an organic molecule capped with a water - attracting carboxylic acid group.

Toyohashi University of Technology researchers led by Associate Professor Shibatomi developed new catalytic reaction to produce chlorine - containing organic molecules in isomerically pure (left - or right - handed) form

Inspired by Aequoreas green glow, Mark Thompson of the University of Southern California and his colleagues synthesized chromophore - like molecules, which they then seeded onto a matrix of organic molecules in an organic LED (OLED).

Today is the birthday of Derek Barton, a British chemist born in 1918 who revolutionized organic chemistry by launching conformational analysis, the study of the three - dimensional structure of complex molecules.

The pattern, observed in a surface architecture just one molecule thick, was formed by self - assembly of linear organic linkers, imaged as rods, and lanthanide cerium centers, visualized as bright protrusions.

To construct the solar cell, the semiconductor molecules are deposited as thin films on glass with the same production methods used by organic light - emitting diode manufacturers.

Recently Berkeley Lab scientists used this method to calculate the absorption spectrum and confirm what several experimental results have been hinting — that the element berkelium breaks form with its heavy element peers by taking on an extra positive charge when bound to a synthetic organic molecule.

In research published in the Proceedings of the National Academy of Sciences in 2012, Donahue and colleagues showed conclusively that organic molecules given off by pine trees, called alpha - pinene, are chemically transformed multiple times in the highly oxidizing environment of the atmosphere.

The MOF under study was made up of pyramidal molecular frameworks, each consisting of a zinc atom surrounded by four cyclical, organic molecules called imidazolates.

According to a prediction published last year by American researchers, capillary forces could suck neon and some organic molecules into buckytubes.

He searches for organics in dinosaur fossils by using heat to break down molecules into volatile components and running them through a mass spectrometer.

Using the energy of the sun, they break the water molecules apart and use the hydrogen to create organic compounds like carbohydrates, leaving oxygen behind as a by - product.

One then «reconstructs» the molecule by examining the interaction of the orbitals of the ligand, typically an organic molecule, with the orbitals of the MLn, fragment.

The Grignard reaction is a classic reaction in organic chemistry, useful for building the carbon skeleton of molecules by transforming carbon - halogen bonds into carbon - carbon bonds.

The laser fires at a clear film of molecules consisting of tin and sulfur atoms arranged in a diamondlike pattern and surrounded by organic groups.

In York, inspired by the «beauty and symmetry» of the dendritic organic molecules he had worked on for his postdoc, Smith and his lab members worked to create similar molecules.

University of Utah physicists believe they have solved the problem by creating a new organic molecule that is shaped like rotelle — wagon - wheel pasta — rather than spaghetti.

In their experiments, the researchers made use of DXP, the organic molecule which is a red dye of the same type as once used by Ferrari for their famous Testarossa.

In the crystal developed by UCLA researchers, a metallo - organic framework (top and bottom layers of molecules) surrounds central sphere - like shapes, which can rotate at up to 50 billion rotations per second.

Makoto Fujita and his team from Japan's University of Tokyo created scaffolding - like crystalline structures known as metal - organic frameworks, or MOFs, whose empty spaces can soak up molecules and provide an ordered array that enables the molecules to then be characterized by X-ray analysis.

The researchers ascribe this effect to the interaction between the electrons carrying electricity and the magnetic field which is generated by the surrounding atomic nuclei in the organic molecules.

For the first time, complex organic molecules (depicted by stick molecules in the artist's representation above) that are potential precursors to some building blocks of life have been spotted in the protoplanetary disk surrounding another star.

They can reveal important organic molecules, but are obscured by atmospheric moisture.

But the enhanced instruments aboard NASA's Spitzer Space Telescope are breaching that barrier in a critical way: by detecting extremely subtle differences in wavelengths of infrared light, enough to isolate the nature and quantities of simple organic molecules.

The scientists investigated a chemical reaction that involved breaking carbon - to - iodine bonds in the organic molecule iodobenzene, by means of metallic copper, a common catalyst.

They suspect that the way the olfactory system is organized has little to do with how an organic chemist might organize molecules (for instance, by the number of carbon atoms on each molecule); instead, it more closely resembles the complex way that chemicals are associated in the real world.

It is possible that this handedness is produced by the interaction of ultraviolet radiation with icebound organic molecules in a vacuum.

«Since nanoparticles started to be implemented in the first prototype devices, people have asked what's going on at the surface and how we can adjust properties by changing the organic molecules on the surface,» says Zherebetskyy.

Waka Nakanishi, an organic chemist at the National Institute for Materials Science in Tsukuba, Japan, has designed a nanocar with two sets of «flaps» that are intended to flutter like butterfly wings when the molecule is energized by the STM tip.