• Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. (wikipedia.org)
  • C-13 is a stable carbon isotope. (lookformedical.com)
  • The β+ and β- annihilation (interaction of matter and anti-matter) would lead to the emission of a high energy photon, γ , (Einstein) from the nucleus of the now stable copper isotope and a neutrin to conserve the lepton number. (journal-of-nuclear-physics.com)
  • its only stable isotope is 23Na. (absoluteastronomy.com)
  • Isotopes lighter than the stable isotopes primarily undergo beta plus decay to isotopes of arsenic, and isotopes heavier than the stable isotopes undergo beta minus decay to isotopes of bromine, with some minor neutron emission branches in the heaviest known isotopes. (w3we.com)
  • for this reason among others, zinc, cadmium, and mercury are often not considered to be transition metals like the rest of the d-block metals. (wikipedia.org)
  • Here, two soils were separated into four particle size fractions, namely fine sand, silt, fine silt, and colloidal particles and used to determine cadmium (Cd) and zinc (Zn) concentrations and isotope compositions. (bvsalud.org)
  • The very rough areas are likely associated with defects-in this case with fewer zinc atoms and an oxygen-rich crystal structure (C)-and are the most active sites for methanol production when water is present. (bnl.gov)
  • When hydrogen atoms come in contact with the metal (Ni), they abandon their stationary state as they deposit their electrons in the conductivity band of the metal, and due to their greatly reduced volume, compared to that of their atom, the hydrogen nuclei (naked protons) readily diffuse into the defects of the nickel crystalline structure as well as in tetrahedral or octahedral void spaces of the crystal lattice. (journal-of-nuclear-physics.com)
  • it is conceivable that, for a very short time period (e.g. 10ˆ-18 sec), a series of neutral mini atoms of hydrogen could be formed, in an unstable state , of various size and energy level, distributed within the Fermi band, which is enlarged due to the very short time (Heisenberg). (journal-of-nuclear-physics.com)
  • The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. (wikipedia.org)
  • A variety of zinc compounds are commonly used, such as zinc carbonate and zinc gluconate (as dietary supplements), zinc chloride (in deodorants), zinc pyrithione (anti-dandruff shampoos), zinc sulfide (in luminescent paints), and dimethylzinc or diethylzinc in the organic laboratory. (wikipedia.org)
  • Hydrogen sulfide (H2S) and bisulfide (SH−) are the conjugate acids of sulfide. (wikipedia.org)
  • Instead sulfide converts to hydrosulfide: S2− + H2O → SH− + OH− Upon treatment with an acid, sulfide salts convert to hydrogen sulfide: S2− + H+ → SH− SH− + H+ → H2S Oxidation of sulfide is a complicated process. (wikipedia.org)
  • This sulfide minerals recorded information (like isotopes) of their surrounding environment during their formation. (wikipedia.org)
  • Oxidation of sulfide can also form thiosulfate (S 2O2− 3) an intermediate species responsible for severe problems of pitting corrosion of steel and stainless steel while the medium is also acidified by the production of sulfuric acid when oxidation is more advanced. (wikipedia.org)
  • One of the reasons why we think we see these unique microbes is because of the properties associated with volcanic eruptions: lots of sulfur and hydrogen sulfide gas, which are likely fueling the unique taxa we found," said Nick Dragone , Cooperative Institute for Research in Environmental Sciences (CIRES) PhD student and lead author of the study. (my.id)
  • Arsenic metabolism is affected by tissue and blood levels of zinc, selenium, arginine, choline, methionine, taurine, and quaniacetic acid, all of which affect methyl-group metabolism and polyamine synthesis which is the site of arsenic function in human physiology. (mighty-90.com)
  • Taking copper in combination with zinc, manganese, and calcium might slow bone loss in older women. (supplemented.net)
  • Caribbean reef sharks exhibited some of the highest metal concentrations compared to five other species, and peaks in the concentrations of Pb, Cr, Cu, Zn, and Ag were observed as individuals reached sexual maturity. (researchgate.net)
  • The mechanism proposed by Focardi - Rossi, verified by mass spectroscopy data, which predicts transmutation of a nickel nucleus to an unstable copper nucleus (isotope), remains in principle valid. (journal-of-nuclear-physics.com)
  • The difference is that inside the unstable copper nucleus, produced from the fusion of a hydrogen mini-atom with a nickel nucleus, is trapped the mini-atom electron ( β- ), which in my opinion undergoes in-situ annihilation, with the predicted (Focardi-Rossi) decay β+ of the new copper nucleus. (journal-of-nuclear-physics.com)
  • It was formerly known as eka-caesium and actinium K.Actually the least unstable isotope, francium-223 It has the lowest electronegativity of all known elements, and is the second rarest naturally occurring element. (absoluteastronomy.com)
  • Selenium requirements in plants differ by species, with some plants requiring relatively large amounts and others apparently requiring none. (w3we.com)
  • Selenium has seven naturally occurring isotopes. (w3we.com)
  • Mainstream smoke yields of hydrogen cyanide (HCN) and three aromatic amines, 1-aminonaphthalene, 2-aminonaphthalene, and 4-aminobiphenyl, from 60 little cigar brands currently on the US market were measured for both International Organization for Standardization (ISO) and Canadian Intense (CI) smoking regimens. (cdc.gov)
  • The 65 Zn forms a negatively charged zinc complex which is retained by the anion exchange resin, and Gallium and 68 Ge species are not retained. (atlasofscience.org)
  • It is shown that in aqueous solutions, zinc phthalocyanines with cholinyl peripheral substituents form complexes with negatively charged DND based on electrostatic interactions. (allergy-link.com)
  • k obs = a + b [H + ]. The oxidation of MeCDO exhibited a substantial kinetic isotope effect ( k H / k D = 4.33 at 303 K). The role of aldehyde hydrate in the oxidation process has been discussed. (ias.ac.in)
  • the hydrogen-ion dependence has the form k obs = c+d [H + ]. The oxidation of [1, 1- 2 H 2 ] ethanol (MeCD 2 OH) exhibited a substantial primary kinetic isotope effect. (ias.ac.in)
  • The oxidation of deuterioformic acid showed the presence of a primary kinetic isotope effect ( k H / k D ≈4). (ias.ac.in)
  • The reaction exhibited the presence of a substantial kinetic isotope effect. (ias.ac.in)
  • Although neither zinc nor zirconium is ferromagnetic, their alloy, ZrZn 2, exhibits ferromagnetism below 35 K. Zinc makes up about 75 ppm (0.0075%) of Earth's crust, making it the 24th most abundant element. (wikipedia.org)
  • Citric acid is added to the 68 Ge solution to prevent the formation of insoluble gallium species [Ga(OH) 3 ], and the pH is raised to ~12.5 with sodium hydroxide. (atlasofscience.org)
  • Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive with water, generating sufficient heat to ignite the hydrogen emitted in the reaction.Potassium and sodium are. (absoluteastronomy.com)
  • Oxidation of lower phosphorus oxyacids by benzyltrimethylammonium dichloroiodate (BTACI), in the presence of zinc chloride, resulted in the formation of the corresponding oxyacids with phosphorus in a higher oxidation state. (ias.ac.in)
  • The reaction is first order with respect to the concentration of BTACI, oxyacid and zinc chloride. (ias.ac.in)
  • The Focardi-Rossi approach considers this shielding a basic requirement for surpassing the Coulomb barrier between the hydrogen nuclei (protons) and the Nickel lattice nuclei, resulting into release of energy, which is a fact, through a series of exothermic nuclear processes leading to transmutations, decays, etc. (journal-of-nuclear-physics.com)
  • It should be underlined that, in addition to the deposited hydrogen electrons, in the nickel mass included are also electrons of the chemical potential of the metal. (journal-of-nuclear-physics.com)
  • The "step" edges between copper-oxide and zinc-oxide (A, where blue is zinc, red is oxygen) are the main active sites for producing methanol when no water is present. (bnl.gov)
  • During the complex formation, quenching of phthalocyanine fluorescence and a decrease in its ability to generate reactive oxygen species were observed. (allergy-link.com)
  • was used as a reactivity model of reactive oxygen species and solubilized in water using β-cyclodextrin (β-CD). (allergy-link.com)
  • It is proposed that the reactive oxidizing species is [PhCH 2 Me 3 N] + [Zn 2 Cl 6 ] −2 I + . It has been shown that the pentacoordinated tautomer of the phosphorus oxyacid is the reactive reductant. (ias.ac.in)
  • In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. (wikipedia.org)
  • The reaction is catalysed by hydrogen ions. (ias.ac.in)
  • Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. (wikipedia.org)
  • The study authors believed they would find organisms observed when a glacier retreats or other typical early colonizer species - but instead, they discovered a unique group of bacteria that metabolize sulfur and atmospheric gases. (my.id)
  • When run with water, the copper-zinc oxide catalyst had 80% selectivity for methanol production. (bnl.gov)
  • Each state of the catalyst exhibits distinct selectivity for the dehydrogenation of ethanol reaction with the single-atom alloy phase exhibiting high selectivity to acetaldehyde and hydrogen versus a range of products from Pd clusters. (nature.com)
  • Overall the program emphasizes the origins, ecology, and evolution of marine lakes, including how their species vary through time due to regional variation in the ocean and climate. (coralreefpalau.org)
  • The broad program looks at the ecology and evolution of marine lakes and their organisms, and how this relates to important issues such as invasive species and climate change. (coralreefpalau.org)
  • A zinc containing enzyme of the hydrolase class that catalyzes the removal of the N-terminal amino acid from most L-peptides, particularly those with N-terminal leucine residues but not those with N-terminal lysine or arginine residues. (lookformedical.com)
  • Here, eleven enzyme variants of two different [FeFe]-hydrogenases (CpI and HydA1) with substitutions in the presumptive PT-pathway are examined kinetically, spectroscopically, and crystallographically to provide solid experimental proof for its role in hydrogen-turnover. (nature.com)
  • It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. (absoluteastronomy.com)
  • Brass, an alloy of copper and zinc in various proportions, was used as early as the third millennium BC in the Aegean area and the region which currently includes Iraq, the United Arab Emirates, Kalmykia, Turkmenistan and Georgia. (wikipedia.org)
  • The new paper describes how a common copper-zinc oxide catalyst can steer the reaction along different pathways depending on whether water is present. (bnl.gov)
  • To find out how the copper-zinc catalyst achieves 80 and 30 percent specificity with and without water, respectively, the team conducted detailed studies using a variety of techniques that worked hand-in-hand with theoretical calculations to reveal crucial details of the reaction mechanism. (bnl.gov)
  • Consumption of excess zinc may cause ataxia, lethargy, and copper deficiency. (wikipedia.org)
  • Dissolved free sulfides (H2S, HS− and S2−) are very aggressive species for the corrosion of many metals such as steel, stainless steel, and copper. (wikipedia.org)
  • Copper-zinc oxide is a commercial catalyst that is readily available and not too expensive," said Sanjaya Senanayake, one of the study co-authors. (bnl.gov)
  • In most of its range in Asia, this is the largest of the drongo species and is readily identifiable by the distinctive tail rackets and the crest of curled feather that begin in front of the face above the beak and along the crown to varying extents according to the subspecies. (aladdin.st)
  • The central theme of this methodology is the formation of alpha -aminoalkyl radicals from existing amino acid and alpha -amino alcohol derivatives by 1,5-hydrogen atom transfer and the subsequent trapping of these radicals with appropriate radicalphiles, thus generating quaternary centres with high efficiency and excellent stereocontrol. (exeter.ac.uk)
  • Residence Times of Molecular Complexes in Solution from NMR Data of Intermolecular Hydrogen-Bond Scalar Coupling. (utmb.edu)
  • Am-Americum are radioactive isotopes and have a half-life of 7,950 years. (mighty-90.com)
  • At-Atatine is a radioactive isotope with an extremely short half-life of 7.2 to 8 hours. (mighty-90.com)
  • In marine biomes, notably within polar regions, a deficit of zinc can compromise the vitality of primary algal communities, potentially destabilizing the intricate marine trophic structures and consequently impacting biodiversity. (wikipedia.org)
  • This scanning tunneling electron microscope image shows the structure of a copper-zinc oxide catalyst that converts methane to methanol with and without water. (bnl.gov)
  • Corrosion-resistant zinc plating of iron (hot-dip galvanizing) is the major application for zinc. (wikipedia.org)
  • Work by Luigi Galvani and Alessandro Volta uncovered the electrochemical properties of zinc by 1800. (wikipedia.org)
  • Zinc metal was not produced on a large scale until the 12th century in India, though it was known to the ancient Romans and Greeks. (wikipedia.org)
  • Zinc is a bluish-white, lustrous, diamagnetic metal, though most common commercial grades of the metal have a dull finish. (wikipedia.org)
  • The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. (wikipedia.org)
  • To date, the oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as the 9th century AD when a distillation process was employed to make pure zinc. (wikipedia.org)
  • This ongoing area of research has led to further investigations into the 1,5-hydrogen atom transfer process and in particular, studies into the effectiveness of deuterium as a protecting group for C-H bonds in radical and carbene chemistry. (exeter.ac.uk)
  • A total of 36 individual sharks from six species were evaluated, spanning two regions/study areas, with a focus on the Caribbean reef shark (Carcharhinus perezi), and to a lesser extent the tiger shark (Galeocerdo cuvier), due their high relative abundance and ecological significance throughout coastal Bahamian and regional ecosystems. (researchgate.net)
  • The hydrogen-ion dependence has the form k obs = a + b [H + ]+ c [H + ] 2 . (ias.ac.in)
  • The isotope pair is used to make a medical isotope generator that separates 68 Ga from 68 Ge, and the pure 68 Ga can be used in radiopharmaceuticals. (atlasofscience.org)
  • Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. (wikipedia.org)
  • Zinc is also an essential nutrient element for coral growth as it is an important cofactor for many enzymes. (wikipedia.org)
  • A second use of 68 Ge / 68 Ga is in the calibration of Positron Emission Tomography cameras which are used to image positron emitting isotopes on the radiopharmaceuticals. (atlasofscience.org)
  • You shouldn't take copper supplements and zinc supplements at the same time. (supplemented.net)
  • The distribution range of this species extends from the western Himalayas to the eastern Himalayas and Mishmi Hills in the foothills below 4000 feet. (aladdin.st)
  • It was one of 240 bird species that Linnaeus added to his twelfth edition based on the 1760 work Ornithologie by the French naturalist Mathurin Jacques Brisson. (aladdin.st)
  • In this work, detonation nanodiamonds (DNDs) were used to deliver polycationic zinc phthalocyanines to E. coli cells. (allergy-link.com)
  • Zinc deficiency affects about two billion people in the developing world and is associated with many diseases. (wikipedia.org)
  • It sometimes occurs in people who get too much zinc from diet or supplements, have intestinal bypass surgery, or are fed by feeding tubes. (supplemented.net)
  • This pathway ends with C299 located in hydrogen-bonding distance to the amine head-group of the adt-ligand. (nature.com)