Loading...
  • oxidation
  • Anaerobic oxidation of methane (AOM) coupled to sulfate reduction is a microbially mediated unique natural phenomenon with an ecological relevance in the global carbon balance and potential application in biotechnology. (feedage.com)
  • Earth's
  • Carbon dioxide concentrations have varied widely over the Earth's 4.54 billion year history. (wikipedia.org)
  • citation needed] The production of free oxygen by cyanobacterial photosynthesis eventually led to the oxygen catastrophe that ended Earth's second atmosphere and brought about the Earth's third atmosphere (the modern atmosphere) 2.4 billion years before the present. (wikipedia.org)
  • Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel-iron meteorites that were not exposed to oxygen when outside Earth's atmosphere. (wikipedia.org)
  • oxide
  • Oxygen unites directly with a number of other elements to form oxides oxide, chemical compound containing oxygen and one other chemical element. (thefreedictionary.com)
  • Water is the oxide of hydrogen. (thefreedictionary.com)
  • The sensing mechanism of metal oxide nanostructures is based on the activation of atmospheric oxygen on the surface at high temperatures [ 1 - 26 ]. (mdpi.com)
  • UXL Encyclopedia of Science( 10 view With more than 600 very 50 other and different semantics latest solid-oxide of a selection as led in 1998 takes l on Terms in the problem of European, jail, and transformation reviews now poorly as the markets of card, phase, heads, diverse consumption, and aRb. (postgrp.com)
  • In this work, magnetic iron oxide nanoparticles functionalized with L-cysteine (Cys-Fe3O4 NPs) was synthesized and fully characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Fourier transform infra-red (FTIR), thermogravimetric analysis (TGA) and zeta potential measurements. (diva-portal.org)
  • As a toxic gas that leaves no residue on items it contacts, ethylene oxide is a surface disinfectant that is widely used in hospitals and the medical equipment industry to replace steam in the sterilization of heat-sensitive tools and equipment, such as disposable plastic syringes. (wikipedia.org)
  • The relative instability of the carbon-oxygen bonds in the molecule is revealed by the comparison in the table of the energy required to break two C-O bonds in the ethylene oxide or one C-O bond in ethanol and dimethyl ether: This instability correlates with its high reactivity, explaining the ease of its ring-opening reactions (see Chemical properties). (wikipedia.org)
  • ions
  • The hydrogen ions resulting from the enzymatic process are recovered and combined in order to supply the hydrogen fuel cell. (google.es)
  • 3. A process as claimed in claim 2 , wherein said hydration of step b) is catalysed by means of an enzyme capable of catalysing the hydration of dissolved CO 2 into hydrogen ions and bicarbonate ions. (google.es)
  • 10. A process as claimed in claim 1 , wherein the combining step c) comprises the step of adding to the solution of bicarbonate ions and hydrogen ions obtained in step b) an electron donor. (google.es)
  • An inductively coupled plasma is a plasma that is energized (ionized) by inductively heating the gas with an electromagnetic coil, and contains a sufficient concentration of ions and electrons to make the gas electrically conductive. (wikipedia.org)
  • In these plasmas the positive ions are almost all singly charged and there are few negative ions, so there are nearly equal amounts of ions and electrons in each unit volume of plasma. (wikipedia.org)
  • ammonium
  • The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). Pure hydrogen-oxygen flames emit ultraviolet light and with high oxygen mix are nearly invisible to the naked eye, as illustrated by the faint plume of the Space Shuttle Main Engine, compared to the highly visible plume of a Space Shuttle Solid Rocket Booster, which uses an ammonium perchlorate composite. (wikipedia.org)
  • As salts or esters of hydrogen cyanide (HCN, or hydrocyanic acid), cyanides are formed by replacing the hydrogen of hydrogen cyanide with a metal, such as sodium or potassium , or by replacing the hydrogen with a radical (such as ammonium). (newworldencyclopedia.org)
  • bonds
  • The molecules of water are constantly moving in relation to each other, and the hydrogen bonds are continually breaking and reforming at timescales faster than 200 femtoseconds (2×10−13 seconds). (wikipedia.org)
  • oxides
  • Oxides are widely and abundantly distributed in nature. (thefreedictionary.com)
  • Functionalized metal oxides are widely used for vapor sensing applications [ 1 - 34 ]. (mdpi.com)
  • Despite the multiple attractive features of metal oxides as gas-sensitive materials, the detection of chemicals with a high-temperature chemiresistor can be challenging and presents a number of difficulties, such as: substantial thermal noise, high energy consumption and large size from the incorporation of additional heating elements, temperature controller, and signal processing elements. (mdpi.com)
  • In order to expand the scope of its usage, graphene hybrids which combine the synergetic properties of graphene along with metals/metal oxides and other nanostructured materials have been synthesized and are a widely emerging field of research. (frontiersin.org)
  • gases
  • An alkali anion exchange membrane (AAEM) is a semipermeable membrane generally made from ionomers and designed to conduct anions while being impermeable to gases such as oxygen or hydrogen. (wikipedia.org)
  • IUPAC
  • The accepted IUPAC name of water is oxidane or simply water,or its equivalent in different languages, although there are other systematic names which can be used to describe the molecule. (wikipedia.org)
  • whereby
  • The various cyanides are salts or esters of HCN (hydrogen cyanide or hydrocyanic acid), whereby the hydrogen is replaced with a metal or radical, yielding such as potassium cyanide (KCN), calcium cyanide (CA(CN) 2 ), or ethyl cyanide (CH 3 CH 2 CN). (newworldencyclopedia.org)
  • electrically
  • citation needed] The plasmas used in spectrochemical analysis are essentially electrically neutral, with each positive charge on an ion balanced by a free electron. (wikipedia.org)
  • aromatic
  • The reason for this difference is the higher electronegativity for oxygen drawing away electrons to itself at the expense of the aromatic ring current. (wikipedia.org)
  • Yet as an aromatic substituent the thio group is less electron-releasing than the alkoxy group. (wikipedia.org)
  • fossil fuels
  • Interest in developing catalysts for solar-powered reduction of carbon dioxide to generate fuels has increased with the rapid consumption of fossil fuels over the past century, and with the desire for renewable sources of energy. (eurekalert.org)
  • detection
  • We show a near 100 percent selectivity of CO production, with no detection of competing gas products like hydrogen or methane," said Haimei Zheng, staff scientist in Berkeley Lab's Materials Sciences Division and co-corresponding author of the study. (eurekalert.org)
  • water
  • Finally, water, a by-product of the oxidizing reaction of the hydrogen fuel cell, is recovered and recycled back into the aqueous enzymatic system. (google.es)
  • 7. A process as claimed in claim 1 , wherein the hydrogen fuel cell also generates, in step d), water that is recycled and used in the catalysing step b). (google.es)
  • Because of hydrogen bonding between water molecules, the latent heats latent heat, heat change associated with a change of state or phase (see states of matter). (thefreedictionary.com)
  • Unlike other analogous hydrides of the oxygen family, water is primarily a liquid under standard conditions due to hydrogen bonding. (wikipedia.org)
  • Water has a very high specific heat capacity of 4.1814 J/(g·K) at 25 °C - the second highest among all the heteroatomic species (after ammonia), as well as a high heat of vaporization (40.65 kJ/mol or 2257 kJ/kg at the normal boiling point), both of which are a result of the extensive hydrogen bonding between its molecules. (wikipedia.org)
  • fraction
  • Interest in storing power from these intermittent sources grows as the renewable energy industry begins to generate a larger fraction of overall energy consumption. (wikipedia.org)
  • amounts
  • For example, bitter almonds (as opposed to sweet almonds) can yield dangerous amounts of prussic acid (hydrogen cyanide) when eaten raw, but the toxicity can be removed by heating. (newworldencyclopedia.org)
  • genetic
  • 7 January Scientists report that, about 800 million years ago, a minor genetic change in a single molecule, called GK-PID, may have allowed organisms to go from a single cell organism to one of many cells. (wikipedia.org)
  • energy
  • The C−S bond dissociation energy for thiomethane is 89 kcal/mol (370 kJ/mol) compared to methane's 100 kcal/mol (420 kJ/mol) and when hydrogen is replaced by a methyl group the energy decreases to 73 kcal/mol (305 kJ/mol). (wikipedia.org)
  • We prepared three different compositions of Cu x Te target material and studied the properties of sputtered films using X-Ray Diffraction (XRD), Energy Dispersive X-Ray Spectroscopy (EDS), Scanning Electron Microscopy (SEM) and Hall measurements. (ohiolink.edu)
  • The energy isn't stored directly, but the work-product of consuming energy (pumping away heat) is stored, having the equivalent effect on daytime consumption. (wikipedia.org)
  • electricity
  • The object of the invention is the coupling of a hydrogen fuel cell to an enzymatic process for the production of electricity and the transformation and sequestration of CO2. (google.es)
  • transfer
  • For example, carbon nanotubes (CNTs), whose properties emerge in the axial direction, can be functionalized onto the surface of graphene, combining the properties of the two carbon allotropes in all directions while allowing for an increased active surface area and faster electron transfer kinetics. (frontiersin.org)