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421
Understanding Dioxygen Activation in the Fe(III)-Promoted Oxidative Dehydrogenation of Amines: A Computational Study
Published 2025-01-01“…Experiments with the deuterated ligand L<sup>3</sup> reveal a primary C-H kinetic isotope effect, <i>k</i><sup>CH</sup>/<i>k</i><sup>CD</sup> = 2.30, suggesting C-H bond cleavage as the rate-determining step. …”
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422
The microbiota-derived bile acid taurodeoxycholic acid improves hepatic cholesterol levels in mice with cancer cachexia
Published 2025-12-01“…More broadly, our work demonstrates the interest and relevance of microbial activity measurements using stable isotopes, an approach currently underused in the microbiome field.…”
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423
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424
Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustr...
Published 2025-01-01“…This study establishes hydrocarbon generation patterns for the Fengcheng shale and Lucaogou shale using a semi-open thermal simulation system, combined with rock pyrolysis, vitrinite reflectance (Ro), total organic carbon (TOC) analysis, carbon isotope analysis, gas chromatography-mass spectrometry (GC-MS), mercury porosimetry, and nitrogen adsorption. …”
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425
Failure to repair damaged NAD(P)H blocks de novo serine synthesis in human cells
Published 2025-01-01“…Control and NAXD-deficient cells were cultivated under different conditions, followed by cell viability and mitochondrial function assays as well as metabolomic analyses without or with stable isotope labeling. Enzymatic assays with purified recombinant proteins were performed to confirm molecular mechanisms suggested by the cell culture experiments. …”
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426
Strontium isoscape of sub-Saharan Africa allows tracing origins of victims of the transatlantic slave trade
Published 2024-12-01“…Abstract Strontium isotope (87Sr/86Sr) analysis with reference to strontium isotope landscapes (Sr isoscapes) allows reconstructing mobility and migration in archaeology, ecology, and forensics. …”
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427
A strontium isoscape of southwestern Australia and progress toward a national strontium isoscape
Published 2025-01-01“…Results demonstrate a wide range of quite elevated Sr isotopic values (0.7152 to 1.0909, with a median of 0.7560) over the survey area, reflecting a large diversity of source rock lithologies, geological processes, and bedrock ages. …”
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428
Time Zero for Net Zero: A Coal Mine Baseline for Decarbonising Heat
Published 2022-12-01“…In addition, over 550 water, rock and gas samples collected during borehole drilling and testing underwent diverse geochemical, isotopic and microbiological analysis. Initial results indicate a connected subsurface with modern groundwater, and resolve distinctive chemical, organic carbon and stable isotope signatures from different horizons that offer promise as a basis for monitoring methods. …”
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429
Direct measurement of three different deformations near the ground state in an atomic nucleus
Published 2025-01-01“…Abstract Atomic nuclei serve as prime laboratories for investigations of complex quantum phenomena, where minor nucleon rearrangements cause significant structural changes. 190Pb is the heaviest known neutron-deficient Pb isotope that can exhibit three distinct shapes: prolate, oblate, and spherical, with nearly degenerate excitation energies. …”
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430
Rapid screening of 420 pesticide residues in fruits and vegetables using ultra high performance liquid chromatography combined with quadrupole-time of flight mass spectrometry
Published 2023-07-01“…The accurate mass database and MS/MS database which contains 420 pesticides were established, the automatic retrieval of detection results was carried on according to the accurate mass, retention time, isotope ratio, ion fragment information, and so on. …”
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431
The 0ν2β-decay CROSS experiment: preliminary results and prospects
Published 2020-01-01“…The basic concept of CROSS consists of rejecting this challenging background component by pulse-shape discrimination, assisted by a proper coating of the faces of the crystal containing the isotope of interest and serving as energy absorber of the bolometric detector. …”
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432
Canopy structure modulates the sensitivity of subalpine forest stands to interannual snowpack and precipitation variability
Published 2025-02-01“…Here, we present data from a network of sap velocity sensors and xylem water isotope measurements from three common tree species (<i>Picea engelmannii</i>, <i>Abies lasiocarpa</i> and <i>Populus tremuloides</i>) across a hillslope transect in a subalpine watershed in the Upper Colorado River basin. …”
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433
The MAJORANA DEMONSTRATOR Neutrinoless Double-Beta Decay Experiment
Published 2014-01-01“…The Majorana Demonstrator will search for the neutrinoless double-beta (ββ0ν) decay of the isotope Ge with a mixed array of enriched and natural germanium detectors. …”
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434
Petrology of Oligocene Lalehzar igneous rocks in the southeast of Saveh-Naein-Jiroft magmatic belt
Published 2024-12-01“…In this study, zircon U-Pb dating, and whole-rock geochemistry and Sr-Nd isotopic analyzes were performed on granitoid rocks (granite and granodiorite) and associated volcanics. …”
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435
Large range sizes link fast life histories with high species richness across wet tropical tree floras
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436
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437
Natrium Alginate and Graphene Nanoplatelets-Based Efficient Material for Resveratrol Delivery
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438
<i>Lilium candidum</i> Extract Loaded in Alginate Hydrogel Beads for Chronic Wound Healing
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439
Feeding and growth variations affect δ13C and δ15N budgets during ontogeny in a lepidopteran larva
Published 2023-04-01“…Isotopes are widely used in ecology to study food webs and physiology. …”
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440