Results 51 to 60 of about 104,171 (282)

Laser ablation molecular isotopic spectrometry of carbon isotopes [PDF]

Spectrochimica Acta Part B: Atomic Spectroscopy, 2015
Abstract Quantitative determination of carbon isotopes using Laser Ablation Molecular Isotopic Spectrometry (LAMIS) is described. Optical emission of diatomic molecules CN and C2 is used in these measurements. Two quantification approaches are presented: empirical calibration of spectra using a set of reference standards and numerical fitting of a ...
Jinesh C. Jain, Xianglei Mao, Dustin L. McIntyre, Richard E. Russo, Alexander A. Bol′shakov   +4 more
openaire   +2 more sources

Achieving Stable Paired Electrolysis of Captured CO2 and 5‐Hydroxymethylfurfural (HMF) via Tuning Anolyte Composition and Anode Surface

Advanced Functional Materials, EarlyView.
Highly stable paired electrolysis of CO2 and biomass‐derived alcohol (HMF) is achieved by replacing conventional alkaline electrolytes with a tailored triethylamine‐carbonate buffer and anion‐conducting ionomer coatings. This configuration effectively mitigates electrolyte degradation and pH instability typically encountered in alkaline CO2 ...
Mi‐Young Lee, Da Hye Won, Ung Lee, Dong Ki Lee   +3 more
wiley   +1 more source

A basin‐wide carbon‐related proxy dataset in arid China

Geoscience Data Journal
Closed basin accounts for about one‐fifth of the global land area and is an important part of the global terrestrial carbon cycle. Due to its relatively close geographical environment and independent carbon cycling system, it is an ideal place to study ...
Yu Li, Yaxin Xue, Mingjun Gao, Zhansen Zhang, Simin Peng, Junjie Duan   +5 more
doaj   +1 more source

Impacts of Thermal Maturity on the Carbon Isotopes of Hopane Compounds in Lacustrine Shale During Compaction Pyrolysis Experiments

Applied Sciences
The carbon isotopic behavior of hopane compounds during thermal maturation remains ambiguous due to limitations in current detection techniques. In this study, a low-maturity lacustrine shale sample was pyrolyzed in a hydrous semi-open pyrolysis system ...
Lu Li, Yan Liu, Xing Wang, Yaohui Xu, Zhigang Wen, Haowei Chen, Gang Yan, Zhongdeng Lu, Zulin Chen, Zeyang Guo   +9 more
doaj   +1 more source

Tracing water sources of terrestrial animal populations with stable isotopes: laboratory tests with crickets and spiders. [PDF]

PLoS ONE, 2010
Fluxes of carbon, nitrogen, and water between ecosystem components and organisms have great impacts across levels of biological organization. Although much progress has been made in tracing carbon and nitrogen, difficulty remains in tracing water sources
Kevin E McCluney, John L Sabo
doaj   +1 more source

Insensitivity of alkenone carbon isotopes to atmospheric CO2 at low to moderate CO2 levels

Climate of the Past, 2018
. Atmospheric pCO2 is a critical component of the global carbon system and is considered to be the major control of Earth's past, present, and future climate. Accurate and precise reconstructions of its concentration through geological time are therefore
M. Badger, T. Chalk, G. Foster, P. Bown, S. Gibbs, P. Sexton, D. Schmidt, H. Pälike, A. Mackensen, R. Pancost   +9 more
semanticscholar   +1 more source

Metal Nanoclusters for Cancer Imaging and Treatment

Advanced Functional Materials, EarlyView.
This review aims to provide a comprehensive summary and discussion of the core–shell design capabilities of metal nanoclusters (NCs) at the atomic level for cancer imaging and treatment. It offers essential insights into the design principles of metal NCs while also encouraging the exploration of other nanomaterials and their potential theranostic ...
Haiguang Zhu, Ziping Wang, Qiaofeng Yao, Ping Zhang, Jianping Xie, Xun Yuan   +5 more
wiley   +1 more source

Recent developments in heterocycle labeling with carbon isotopes.

Journal of labelled compounds & radiopharmaceuticals, 2018
Heterocycles play an essential role in modern pharmaceutical and agrochemical developments, representing a very common structural unit in marketed drugs. Over the 46 new drugs approved in 2017 by the FDA, 25 contain in their structure a heterocyclic core.
Antonio Del Vecchio, Gianluca Destro, F. Taran, D. Audisio   +3 more
semanticscholar   +1 more source

Atomically Dispersed Copper Electrocatalysts with Proton‐feeding Centers for Efficient Ammonia Synthesis by Nitrate Electroreduction

Advanced Functional Materials, EarlyView.
Rationally‐designed advanced carbon‐based single‐atom catalysts with isolated CuN2O2 active sites anchored in N,O‐doped porous carbon facilitate water dissociation and nitrate reduction, accelerating proton supply for efficient electrosynthesis of ammonia.
Yan Li, Jingyang Guo, Yuwei Yang, Bingliang Wang, Haotian Wen, Thanh Son Bui, Shery L. Y. Chang, Nicholas M. Bedford, Emma Lovell, Rahman Daiyan, Rose Amal, Yang Hou, Richard Tilley, Zhenhai Xia, Liming Dai   +14 more
wiley   +1 more source

Carbon Isotopes in Magmatic Systems: Measurements, Interpretations, and the Carbon Isotopic Signature of the Earth’s Mantle

Geosciences
Carbon isotopes in magmatic systems serve as powerful tracers for understanding magma evolution, mantle processes, the deep carbon cycle, and the origin of Earth’s carbon.
Yves Moussallam
doaj   +1 more source