Results 91 to 100 of about 15,552 (245)

Detection of Sulfur from Industrial Emissions Across a Complex Mountainous Landscape: An Isotope Approach Using Plant-Based Biomonitors in Winter

Atmosphere
Tree rings, tree needles, and moss can be used as biomonitors to evaluate atmospheric pollutant concentrations and deposition patterns spanning different timescales.
Ann-Lise Norman, Sunita LeGallou, Erin E. Caldwell, Patrick M. Blancher, Jelena Matic, Ralph Cartar   +5 more
doaj   +1 more source

Microbial Sulfur Isotope Fractionation in the Chicxulub Hydrothermal System. [PDF]

Astrobiology, 2021
Kring DA, Whitehouse MJ, Schmieder M.
europepmc   +1 more source

One‐Shot Pd(II)‐Catalyzed Multiple C–H Activation Enables Modular Construction of Fluorenylidene Oxindole‐Based Multi(Polycyclic) Aromatic Enes

Chemistry – A European Journal, EarlyView.
A one‐shot Pd(II)‐catalyzed C─H activation strategy enables the rapid conversion of simple linear propiolamides into structurally diverse mono‐, di‐, and tri‐olefin‐bridged MPAEs. This cascade process orchestrates up to six sequential C–H activations in a single operation, providing streamlined access to highly conjugated architectures.
Haiyu Wang, Kouki Sakata, Takuma Sato, Masahiro Terada, Tienan Jin   +4 more
wiley   +1 more source

An improved narrower-diameter EA/IRMS method with a built-in desulfurization reactor: optimization for nitrogen and carbon measurement without sulfur matrix interference

Progress in Earth and Planetary Science
Elemental analysis with isotope ratio mass spectrometry (EA/IRMS) is a widely used technique for stable isotope ratio analysis of nitrogen and carbon. Although the narrower-diameter EA/IRMS method developed to date has effectively enhanced sensitivity ...
Yohei Matsui, Wataru Fujisaki, Takahiro Aze, Toshihiro Miyajima, Shinsuke Kawagucci, Eiji Tasumi, Masahiro Yamamoto, Yoshinori Takano, Tomohiro Toki   +8 more
doaj   +1 more source

Dietary homogenization and spatial distributions of carbon, nitrogen, and sulfur isotope ratios in human hair in South Korea. [PDF]

PLoS One, 2021
Lee HS, Shim JY, Shin WJ, Choi SH, Bong YS, Lee KS.   +5 more
europepmc   +1 more source

Nitrooxylation in Organic Synthesis: From Classical Nitrate Ester Formation to Modern Catalytic Strategies

Chemistry – A European Journal, EarlyView.
Nitrooxylation—the installation of nitrate esters (–ONO2) has evolved from classical mixed‐acid protocols to catalytic and mechano‐, flow‐, photo‐, and electrochemical strategies. This review delineates ionic and radical manifolds for C–ONO2 bond formation, emphasizing mechanistic control, selected substrate scope, and selectivity.
Jayanta Dey, Dmitry Katayev
wiley   +1 more source

Safe, accurate, and precise sulfur isotope analyses of arsenides, sulfarsenides, and arsenic and mercury sulfides by conversion to barium sulfate before EA/IRMS. [PDF]

Anal Bioanal Chem, 2022
Spangenberg JE, Saintilan NJ, Palinkaš SS.   +2 more
europepmc   +1 more source

Syntheses and Properties of Pentafluoroethylplumbanes in the Oxidation States +II, +III, and +IV

Chemistry – A European Journal, EarlyView.
Syntheses of pentafluoroethyl substituted plumbanes in the formal oxidation states +II, +III, and +IV are reported. The compounds were characterized by multinuclear NMR spectroscopy, including 207Pb NMR spectroscopy, mass spectrometry and single‐crystal x‐ray diffraction experiments. ABSTRACT Mono‐, bis‐, and tris(pentafluoroethyl)plumbanes of the type
Michael Grasse, Lukas Hartmann, Beate Neumann, Hans‐Georg Stammler, Berthold Hoge   +4 more
wiley   +1 more source

Guidelines for Sample Preparation and Stable Isotope Analysis of Food for Traceability Studies

Food Safety and Health
Stable isotope analysis is a powerful and increasingly applied tool for food traceability, enabling high‐confidence determination of origin, production practices, and authenticity. This guideline provides practical recommendations for the preparation and
Bayan Nuralykyzy, Syed Abdul Wadood, Jing Nie, Hanyi Mei, Shengzhi Shao, Yongzhi Zhang, Chunlin Li, Yuwei Yuan, Karyne M. Rogers   +8 more
doaj   +1 more source

Large sulfur isotope fractionation in lunar volcanic glasses reveals the magmatic differentiation and degassing of the Moon. [PDF]

Sci Adv, 2021
Saal AE, Hauri EH.
europepmc   +1 more source