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Showing 21-40 of 7,717 results
  1. Optimization of a pre-concentration method for the analysis of mercury isotopes in low-concentration foliar samples

    Hg isotope analysis in samples from background regions is constrained by the presence of low Hg concentration and therefore requires a...

    Saeed Waqar Ali, Dominik Božič, ... Milena Horvat in Analytical and Bioanalytical Chemistry
    Article Open access 09 January 2024
  2. Stereochemistry of Organic Alicyclic Compounds Containing Carbon–Carbon Double Bonds (Alkenes and Cycloalkenes)

    The simplest compound containing a carbon–carbon double bond is ethylene. Such compounds are called alkenes. In ethylene, a sigma bond between two...
    Chapter 2022
  3. Nitrogen-13, oxygen-15 and carbon-11 in positron emission tomography: an overview

    This review article discusses the most significant aspects related to the conventional positron emitting radionuclides such as nitrogen-13,...

    Article 11 July 2024
  4. Future directions for river carbon biogeochemistry observations

    Joshua F. Dean, Tom J. Battin in Nature Water
    Article 28 February 2024
  5. Use of hydrochemistry, environmental isotopes and radon distribution for assessment of groundwater in the Cenomanian–Turonian aquifer system: a case study from the Barada River valley, Syria

    Combined techniques of hydrochemistry and environmental isotopes were used to characterize the groundwater of the Barada River valley, Syria. A clear...

    Mohamed Al-Hilal, Zuhair Kattan in Journal of Radioanalytical and Nuclear Chemistry
    Article 08 February 2022
  6. Position-specific carbon stable isotope analysis of glyphosate: isotope fingerprinting of molecules within a mixture

    Glyphosate [N-(phosphonomethyl) glycine] is a widely used herbicide and a molecule of interest in the environmental sciences, due to its global use...

    David W. Hoffman, Cornelia Rasmussen in Analytical and Bioanalytical Chemistry
    Article 14 May 2024
  7. Sorption of Protactinium, Thorium, and Other Actinides from the LiF–NaF–KF Melt by Activated Carbon

    Abstract

    The sorption of uranium and thorium fluorides by activated carbon from the eutectic was studied. The sorption isotherms of both fluorides at...

    Yu. S. Fedorov, V. V. Samonin, ... A. A. Akatov in Radiochemistry
    Article Open access 01 December 2022
  8. Stereochemistry of Organic Compounds Containing Asymmetric Carbon

    Carbon is tetravalent, that is it can form four bonds, as in the case of methane. In case, a carbon atom is attached to four different groups or...
    Chapter 2022
  9. Activated carbon treated with different chemical agents for pertechnetate adsorption

    The study investigated the adsorption behaviour of different activated carbon samples for pertechnetate under diverse conditions. Characterizations...

    Marek Hupian, Michal Galamboš, ... Martin Daňo in Journal of Radioanalytical and Nuclear Chemistry
    Article Open access 27 February 2024
  10. Characterization of vanillin carbon isotope delta reference materials

    Stable carbon isotope ratio measurements are used to investigate the provenance of vanillin. In this study, a variety of commercial vanillin samples...

    Michelle M. G. Chartrand, Juris Meija, ... Zoltan Mester in Analytical and Bioanalytical Chemistry
    Article Open access 06 October 2022
  11. Ratios of Stable Isotopes 13С/12С and 15N/14N in Samples of Dead Honey Bees and Beekee** Products

    Abstract

    The isotopic composition of carbon (δ 13 С) and nitrogen (δ 15 N) in samples of dead honey bees and beekee** products (honey, pollen load,...

    D. A. Kalashnikova, G. V. Simonova in Journal of Analytical Chemistry
    Article 14 April 2021
  12. Radioanalytical methods for sequential analysis of actinide isotopes in activated carbon filter-bed waste

    In this work, we compare methods for the sequential determination of U and the transuranium elements Np, Pu, Am, and Cm. The chemical yield, the time...

    Bianca Geraldo, Leandro Goulart de Araujo, ... Júlio Takehiro Marumo in Journal of Radioanalytical and Nuclear Chemistry
    Article 11 October 2020
  13. Stable isotope ratios of nitrogen and carbon as biomarkers of a vegan diet

    Purpose

    Dietary biomarkers can potentially overcome the limitations of self-reported dietary data. While in ecology and archaeology, stable isotope...

    Jutta Dierkes, Stefan Dietrich, ... Cornelia Weikert in European Journal of Nutrition
    Article Open access 10 September 2022
  14. Analysis of δ13C and δ15N values in Croatian honey by EA–IRMS and possibility of their application in botanical origin verification

    The aim of this work was to give characteristic stable carbon and nitrogen isotope ratio ( δ 13 C honey , δ 13 C protein and δ 15 N) ranges and examine their...

    Blanka Bilić Rajs, Ivana Flanjak, ... Ljiljana Primorac in Journal of Food Science and Technology
    Article 08 November 2023
  15. Microwave-assisted one-step synthesis of water-soluble manganese-carbon nanodot clusters

    Using metal coordination to assemble carbon nanodots (CND) into clusters can enhance their photophysical properties for applications in sensing and...

    Nina Gomez-Blanco, Maurizio Prato in Communications Chemistry
    Article Open access 23 August 2023
  16. On mixed metric dimension of crystal cubic carbon structure

    Abstract

    Chemical graph theory is a branch of mathematical chemistry which applies classic graph theory to chemical phenomena and entities. Graphs are...

    Malkesh Singh, Sunny Kumar Sharma, Vijay Kumar Bhat in Journal of Mathematical Chemistry
    Article 14 August 2023
  17. Water Distillation as a Method for Separation of Hydrogen and Oxygen Isotopes: State of the Art and Prospects

    Abstract

    Vacuum distillation of water is one of the most environmentally friendly and safe methods for separating the hydrogen and oxygen isotopes. A...

    E. P. Magomedbekov, I. L. Rastunova, N. N. Kulov in Theoretical Foundations of Chemical Engineering
    Article 01 January 2021
  18. Recent Trends in Nobel Metals and Carbon Dots in the Costume of Hybrid Nano Architecture

    In recent years, hybrid architectures have been extensively developed in the fields of environment and energy to overcome the disadvantages of...

    Tean Zaheer, Sana Zia, ... Tasleem Kausar in Topics in Catalysis
    Article 02 October 2023
  19. Utilization of Organic Substrates for Remediation of TENORM Waste Generated from Some Strategic Industries

    The reduction of the enhanced naturally occurring radioactivity in the TENORM residues associated with some strategic industries has become an...

    Ahmed M. Shahr El-Din, Elsayed M. El Afifi, Moustafa A. Hilal in Chemistry Africa
    Article 07 June 2024
  20. Surface modification of petroleum residue-activated carbon using citric acid for enhanced cobalt removal from an aqueous solution

    Although the amount of petroleum residues produced from oil refinery processes has increased, there has been limited research for the residues. In...

    Jong-Soo Choi, Choong Jeon, Suk Soon Choi in Korean Journal of Chemical Engineering
    Article 03 June 2023
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