• The complete primary and three-dimensional solution structures of subtilosin A (1), a bacteriocin from Bacillus subtilis, were determined by multidimensional NMR studies on peptide produced using isotopically labeled [(13)C,(15)N]medium derived from Anabaena sp. (rcsb.org)
  • An isotopical pure diamond is a type of diamond that is composed entirely of one isotope of carbon. (wikipedia.org)
  • Isotopically pure diamonds have been manufactured from either the more common carbon isotope with mass number 12 (abbreviated as 12C) or the less common 13C isotope. (wikipedia.org)
  • Here, we report on the stratigraphy, sedimentology, petrology, carbon isotope chemostratigraphy, and stromatolite development for carbonate-rich successions within the pre-glacial part of the Kungarra Formation and the postglacial Kazput Formation. (edu.au)
  • The sensitive isotope tracer detection allows tracing isotopically labeled materials into necromass biomarkers in SOM pools. (univie.ac.at)
  • Downes, Hilary and Abernethy, F.A.J. and Smith, C.L. and Ross, A.J. and Verchovsky, A.B. and Grady, M.M. and Jenniskens, P. and Shaddad, M.H. (2015) Isotopic composition of carbon and nitrogen in ureilitic fragments of the Almahata Sitta meteorite. (bbk.ac.uk)
  • This study characterizes carbon and nitrogen abundances and isotopic compositions in ureilitic fragments of Almahata Sitta. (bbk.ac.uk)
  • Main release δ15N values of −53 to −94‰ fall within the range reported for diamond separates and acid residues from ureilites, and identify an isotopically primordial nitrogen component. (bbk.ac.uk)
  • However, they differ from common polymict ureilites which are more nitrogen-rich and isotopically heavier. (bbk.ac.uk)
  • Floss C. and Stadermann F. J. (2003) Complementary carbon, nitrogen and oxygen isotopic imaging of interplanetary dust particles: presolar grains and an indication of a carbon isotopic anomaly. (wustl.edu)
  • For example, in diatomic nitrogen N≡N the bond order is 3, while in acetylene H−C≡C−H the bond order between the two carbon atoms is also 3, and the C−H bond order is 1. (absoluteastronomy.com)
  • The isotopes of carbon can be separated in the form of carbon dioxide gas by cascaded chemical exchange reactions with amine carbamate. (wikipedia.org)
  • 3) Temperatures are increasing at a rate we would expect due to the increased forcing of anthropogenic greenhouse gases (primarily carbon dioxide and methane. (sciforums.com)
  • I DID look at ALL of the references you provided and did word searches on all of them (the referenced documents) for ' CO2 boost' and 'carbon dioxide boost' None of the searches successfully found either of the word-string terms. (sciforums.com)
  • We carried out 10 field expeditions between 2010 and 2015 in the lowland part of the Congo River network in the eastern part of the basin (Democratic Republic of the Congo), to describe the spatial variations in fluvial dissolved carbon dioxide ( CO 2 ), methane ( CH 4 ) and nitrous oxide ( N 2 O ) concentrations. (copernicus.org)
  • Model amino acid derivatives bearing a sulfide moiety at the alpha-carbon were synthesized by reaction of the corresponding alpha-alkoxy compounds with benzyl thiol and SnCl(4). (rcsb.org)
  • Due to the structural complexity of sugars, derivatization reactions and high-throughput analytical methods are required to separate and quantify these sugar-related compounds. (univie.ac.at)
  • In the search for life elsewhere in the solar system, we have some expectations about what life might look like: It will likely involve carbon chemistry, and a spatial segregation of organic compounds in a way that simple chemical processes would not permit. (nationalacademies.org)
  • The term also refers to a method of treating wastes in which activated carbon is used to remove organic compounds from wastewater. (itrcweb.org)
  • Acyclic or cyclic, saturated or unsaturated, carbon compounds (excluding aromatic compounds). (itrcweb.org)
  • C-isotopic values show marked variation along a single horizon and even within hand samples, reflecting spatially and temporally variable mixing between dissolved inorganic carbon in seawater and isotopically light inorganic carbon generated via syn- and post-depositional remineralization of organic matter.In contrast, the Kazput carbonates consist of subtidal stromatolites, grainstones, and micrites deposited on a mixed carbonate-siliciclastic shelf. (edu.au)
  • Both liquid and gas chromatography coupled to mass spectrometry (LC-MS and GC-MS, respectively) have been used in targeted and untargeted experiments but require the use of isotopically labeled substrates to glean information on the dynamic processes of DCs. (chromatographyonline.com)
  • this was demonstrated by incubating duck erythrocytes with labeled substrates and then degrading the porphyrin molecule ill a manner by which each carbon atom from a specific position could be isolated. (nationalacademies.org)
  • Such CO2 can be converted to methane and from there to isotopically pure synthetic diamonds. (wikipedia.org)
  • The 12C isotopically pure, (or in practice 15-fold enrichment of isotopic number, 12 over 13 for carbon) diamond gives a 50% higher thermal conductivity than the already high value of 900-2000 W/(m·K) for a normal diamond, which contains the natural isotopic mixture of 98.9% 12C and 1.1% 13C. (wikipedia.org)
  • Kazput carbonates, thus, provide some of the best available evidence that an interval of unexceptional C-isotopic values separates the Lomagundi-Jatuli C-isotopic excursion(s) from the initiation of the GOE as inferred from multiple sulfur isotopes (loss of mass independent fractionation). (edu.au)
  • Maruoka T., Kurat G., Zinner E., Varela M. E. and Ametrano S. J. (2003) Carbon isotopic heterogeneity of graphite in the San Juan mass of the Campo Del Cielo IAB iron meteorite. (wustl.edu)
  • Genomic comparison revealed high conservation of key metabolic features in sublineage II Nitrospira , including respiratory complexes I-V and the machineries for nitrite oxidation and carbon fixation via the reductive tricarboxylic acid cycle. (osti.gov)
  • Specific protocols have been established for ethanol oxidation and carbon monoxide oxidation. (northwestern.edu)
  • A hydrocarbon compound in which the carbon atoms are in a straight-chain, branched, or cyclic arrangement and are saturated or unsaturated. (itrcweb.org)
  • A group of chemicals (also known as paraffins or aliphatic hydrocarbons) for which the carbon atoms are all linked by single covalent bonds. (itrcweb.org)
  • A group of chemicals (also known as paraffins or aliphatic hydrocarbons) for which the carbon atoms contain at least one double bond. (itrcweb.org)
  • Based on the classical model, a revised formulation incorporating an isotopically distinct substrate for day respiration was able to account well for the high observed dawn and dusk (13)Delta values. (who.int)
  • Amari S., Stadermann F. J., Zinner E., and Lewis R. S. (2003) Continued study of presolar graphite from Murchison separate KFA1. (wustl.edu)
  • Novel group IV semiconductor epitaxial structures composed of silicon, germanium, carbon or tin on silicon or silicon-on-insulator wafers provide a natural route for continued improvement of properties of state-of-the-art silicon devices with enhanced or emerging unique properties. (tech-life.news)
  • The instrumental capability to separate volatile analytes by HRGC is, for the most part, no longer the limiting factor in their analysis. (cdc.gov)
  • We analyzed the amounts of microbial carbon (Cmic), microbial N (Nmic), dissolved organic C (DOC) and dissolved organic N (DON) and then assessed whether these variables could help to account for the compositional dissimilarity of ground hexapod communities across temperatures. (univie.ac.at)
  • Posttranslational linkage of a thiol to the alpha-carbon of an amino acid residue is unprecedented in ribosomally synthesized peptides or proteins, and very rare in secondary metabolites. (rcsb.org)
  • This, and many other copepod-driven processes, help transport carbon down into the deep sea, where it may be locked away from the atmosphere for hundreds, or even thousands of years - thereby helping to regulate global climate. (exeter.ac.uk)
  • The mining protocol entails the excavation of the top 50-70 cm of soil (which they consider to be topsoil), followed by the overburden (the layer covering the phosphate), then storing the two soil layers in separate piles. (copernicus.org)
  • PMP-derivatives were separated and quantified via reversed phase (RP) ultra-high-performance liquid chromatography (UPLC) coupled to high-resolution Orbitrap mass spectrometry (MS). The method was validated and applied on hydrolyzed peptidoglycans and the biomass of archaeal, bacterial, fungal and plant species, as well as with soils. (univie.ac.at)
  • However, studies on its ability to immobilize PAH and N, S, and O substituted PAH (hetero-PAH) in real soils, and benchmarking with commercial activated carbon are missing. (univie.ac.at)
  • Isotopically pure 13C diamond layers 20 micrometers thick are used as stress sensors due to the advantageous Raman spectroscopy properties of 13C. (wikipedia.org)
  • Additional samples of 1 were also generated by separate incorporations of [U-(13)C,(15)N]-L-phenylalanine and [U-(13)C,(15)N]-L-threonine using otherwise unlabeled media. (rcsb.org)
  • most showed the major carbon release at temperatures of 600-700 °C with peak values of δ13C from −7.3 to +0.4‰, similar to literature values for unbrecciated ("monomict") ureilites. (bbk.ac.uk)
  • The combined main release δ13C and δ15N values do not overlap the fields for carbonaceous or enstatite chondrites, suggesting that carbon in ureilites was not derived from these sources. (bbk.ac.uk)
  • It is also found that dihydroxy addition and elimination reactions play a major role in the process of desulfonation, carbon skeleton cleavage and benzene ring separation. (bvsalud.org)
  • Isotopically enriched diamonds have been synthesized by application of chemical vapor deposition followed by high pressure. (wikipedia.org)
  • High-performance liquid chromatography (HPLC) has been used to measure isotopically labelled pyridine and its metabolites in urine (Shaker et al. (cdc.gov)
  • As such, Turee Creek carbonate strata provide an opportunity to characterize early Paleoproterozoic carbonate sedimentation and carbon cycle dynamics in the context of significant global change. (edu.au)
  • Given the importance of copepods in the global carbon cycle, there has never been a more urgent need to understand how they will be affected by environmental change. (exeter.ac.uk)
  • Diatom-bacteria aggregates are key for the vertical transport of organic carbon in the ocean. (frontiersin.org)
  • Since chemical binding energies are in the range of 1-5 eV, one will have no ability to determine the chemical binding state of carbon in such a system. (nationalacademies.org)
  • Sensitive and selective methods are available for the qualitative and quantitative measurement of pyridine after it is separated from its sample matrix. (cdc.gov)
  • In this onderzoek en behandeling van de voet, we will attend the students of famous shows from human Yugoslavia, Bulgaria, Albania, Rumania, Greece, and Turkey from the Western and global methods. (mbca-lasvegas.org)
  • Mathematical modeling helps provide a mechanistic understanding for the studied process, separating the main drivers from the circumstantial ones, bounding the outcomes of experiments and guiding engineering approaches. (biomedcentral.com)
  • Ureilites are carbon-rich (containing up to 7 wt% C) and were formed early in solar system history, thus the origin of carbon in ureilites has significance for the origin of solar system carbon. (bbk.ac.uk)
  • Here, we compared the ability of pristine biochar (BC), steam-activated biochar (SABC), and commercial activated carbon (AC) to immobilize PAH and hetero-PAH. (univie.ac.at)
  • Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring. (exeter.ac.uk)