Results 31 to 40 of about 34,135 (304)
Feeding and growth variations affect δ13C and δ15N budgets during ontogeny in a lepidopteran larva
Peer Community Journal, 2023 Isotopes are widely used in ecology to study food webs and physiology. The fractionation observed between trophic levels in nitrogen and carbon isotopes, explained by isotopic biochemical selectivity, is subject to important within-trophic level ...
Charberet, Samuel M. +4 more
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Nitrogen Isotopic Composition and Density of the Archean Atmosphere [PDF]
Science, 2013 Same As It Ever Was Nitrogen constitutes approximately 78% by volume of Earth's atmosphere and is a key component in its chemical and physical characteristics. It is not clear whether N 2 has been so abundant throughout Earth's geological history. Marty et al.
Marty, Bernard +4 more
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Towards a global interpretation of dual nitrate isotopes in surface waters
Journal of Hydrology X, 2019 Modern anthropogenic activities have significantly increased nitrate (NO3−) concentrations in surface waters. Stable isotopes (δ15N and δ18O) in NO3− offer a tool to deconvolute some of the human-made changes in the nitrogen cycle.
J.J. Venkiteswaran +2 more
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Ecological Indicators, 2023 With a high species diversity of coral reefs, Wuzhizhou (WZZ) is a tropical marine ranch built by China. In the present study, we investigated the structure and function of coral reef food webs on WZZ in Sanya to understand how climate change and human ...
Hongyang Yin +9 more
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Use of stable nitrogen isotopes to track plant uptake of nitrogen in a nature-based treatment system
Water Research X, 2020 In nature-based treatment systems, such as constructed wetlands, plant uptake of nutrients can be a significant removal pathway. Current methods for quantifying plant uptake of nitrogen in constructed wetlands, which often involve harvesting biomass and ...
Aidan R. Cecchetti +4 more
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Nitrogen‐isotopic compositions of IIIE iron meteorites [PDF]
Meteoritics & Planetary Science, 2000 Abstract— The (compositionally) closely related iron meteorite groups IIIE and IIIAB were originally separated based on differences in kamacite bandwidth, the presence of carbides only in the IIIE group, and marginally resolvable differences on the Ga‐Ni and Ge‐Ni diagrams.
N. SUGIURA +3 more
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Meta‐analysis fails to show any correlation between protein abundance and ubiquitination changes
FEBS Open Bio, EarlyView.We analyzed over 50 published proteomics datasets to explore the relationship between protein levels and ubiquitination changes across multiple experimental conditions and biological systems. Although ubiquitination is often associated with protein degradation, our analysis shows that changes in ubiquitination do not globally correlate with changes in ...
Nerea Osinalde +3 more
wiley +1 more source
Journal of Threatened Taxa, 2020 The penaeid shrimp Xiphopenaeus kroyeri is the second most important species of crustacean in Brazilian fisheries. Stable isotopes of carbon and nitrogen are chemical proxies to provide quantitative information about the consumer isotopic niche, which is
Keltony de Aquino Ferreira +2 more
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Journal of Isotopes, 2023 In this study, nitrate in standard samples, seawater and lake water and tap water samples were converted to N2O using bacterial denitrification and chemical conversion, the nitrogen and oxygen isotope composition were determined by Isotope Ratio Mass ...
YIN Xijie;YANG Haili;CUI Kunlei;SUN Zhilei;LI Yunhai
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Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications
Advanced Functional Materials, EarlyView.Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai +8 more
wiley +1 more source