Latest chemical composition Stories

Scientists Identify Harmful Elements Of Persisting Oil After Deepwater Horizon
2014-01-23 09:08:29

Ecole Polytechnique Fédérale de Lausanne On 20 April 2010, a floating oil rig in the Gulf of Mexico called Deepwater Horizon suddenly exploded, leading to the largest accidental marine oil disaster in the world. Collaborating scientists at EPFL in Switzerland and the Woods Hole Oceanographic Institution (WHOI) in the United States have analyzed the composition of eight oil-soaked sand patties that were collected along the Gulf shores from April until November in 2011. They determined and...

2011-03-29 19:48:15

Superlenses earned their superlative by being able to capture the "evanescent" light waves that blossom close to an illuminated surface and never travel far enough to be "seen" by a conventional lens. Superlenses hold enormous potential in a range of applications, depending upon the form of light they capture, but their use has been limited because most have been made from elaborate artificial constructs known as metamaterials. The unique optical properties of metamaterials, which include the...

2010-10-01 14:33:01

PM or particulate matter is a type of contaminant in the atmosphere, considered very harmful for health, ecosystems, climate change, conservation of materials and visibility. Chemist Ms Ainhoa Inza studied the presence of this particulate matter in the Autonomous Community of the Basque Country (CAV-EAE); concretely, the type known as PM10, made up of particles of less than ten micras in diameter. Amongst other things, the researcher compared the concentration of this kind of atmospheric...

2010-01-14 15:08:08

Researchers of the University of Granada have conducted the most complete worldwide analysis of the chemical composition and evolutionary state of a spectral type R carbon star. The presence of carbon is essential for the possible development of life in the Universe, and therefore explaining its origin is of vital importance. What are the peculiar type-R stars made? Where does the carbon present in their shell come from? These are the questions to be solved by a research work conducted by...

2010-01-14 11:35:00

Abandon any notion that the duck-billed platypus is a soft and cuddly creature -- maybe like Perry the Platypus in the Phineas and Ferb cartoon. This platypus, renowned as one of the few mammals that lay eggs, also is one of only a few venomous mammals. The males can deliver a mega-sting that causes immediate, excruciating pain, like hundreds of hornet stings, leaving victims incapacitated for weeks. Now scientists are reporting an advance toward deciphering the chemical composition of the...

2009-11-11 13:45:00

The scalding-hot sea that supposedly covered the early Earth may in fact never have existed, according to a new study by Stanford University researchers who analyzed isotope ratios in 3.4 billion-year-old ocean floor rocks. Their findings suggest that the early ocean was much more temperate and that, as a result, life likely diversified and spread across the globe much sooner in Earth's history than has been generally theorized. It also means that the chemical composition of the ancient ocean...

2009-06-15 15:45:18

By squeezing a typical metal alloy at pressures hundreds of thousands of times greater than normal atmospheric pressure, scientists at the California Institute of Technology (Caltech) have created a material that does not expand when heated, as does nearly every normal metal, and acts like a metal with an entirely different chemical composition.The discovery, described in a paper in Physical Review Letters (PRL), offers insight into the exotic behavior of materials existing at high...

2008-10-02 03:00:33

By Soliman, Mohamed Palkowski, Heinz Two Mo-Nb microalloyed transformation-induced-plasticity (TRIP) steels, with Al contents of 0.23 and 0.65, were subjected to several hot-rolling conditions designed to generate different ferrite morphologies and grain sizes. These structures were then cold rolled and TRIP annealed under different heat-treatment conditions. To further develop TRIP steel in terms of strength and ductility, stabilizing retained austenite by isothermal bainitic...

2007-03-22 14:46:58

Chemical Composition of Stars in Clusters Can Tell History of our Galaxy Using ESO's Very Large Telescope, an international team of astronomers has shown how to use the chemical composition of stars in clusters to shed light on the formation of our Milky Way. This discovery is a fundamental test for the development of a new chemical tagging technique uncovering the birth and growth of our Galactic cradle. The formation and evolution of galaxies, and in particular of the Milky Way - the...

2006-12-06 03:00:32

By Narvez-Gonzlez, Ernesto David; de Dios Figueroa-Crdenas, Juan; Taba, Suketoshi; Tostado, Eduardo Castao; Et al ABSTRACT Chemical composition (moisture, total lipids, protein, and apparent amylose) and some physical features (1,000 kernel weight, hardness, and anatomical composition) were determined in 71 accessions representing races of maize from Latin America. Their microstructural characteristics (size and compaction of endosperm cell bodies, pericarp thickness, hornyfloury...

Latest chemical composition Reference Libraries

2005-05-26 12:19:41

Amphibole defines an important group of dark-colored rock-forming inosilicate minerals composed of double chain SiO4 tetrahedra linked at the vertices and generally containing ions of iron and/ or magnesium in their structures. In chemical composition and general characteristics they are very similar to the pyroxenes and, like them, fall into three series according to their system of crystallization. The chief difference between amphiboles and pyroxenes is in cleavage: amphiboles form oblique...

2005-05-26 11:31:44

Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has chemical composition CuFeS2. It has a brassy to golden yellow color and hardness of 3.5 to 4 on the Mohs scale. Due to its color it is often confused with pyrite though this mineral has a cubic and not a tetragonal crystal system and chalcopyrite is more often massive and less brittle. Chalcopyrite is also a darker yellow in color. Chalcopyrite is one of the most important copper ores....

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Word of the Day
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'