Results 91 to 100 of about 129,759 (304)

Research Progress on Black Carbon Isotope Analytical Pre-treatments

Journal of Isotopes
As a product of incomplete combustion of biomass and fossil fuels，black carbon has an important impact on many fields such as climate change，health，environment and carbon cycle. For a long time，δ13C and Δ14C analysis have been widely used in black carbon
Zhou YI, Xijie YIN, Jiping WANG
doaj   +1 more source

Assessing connectivity between an overlying aquifer and a coal seam gas resource using methane isotopes, dissolved organic carbon and tritium [PDF]

, 2015
Coal seam gas (CSG) production can have an impact on groundwater quality and quantity in adjacent or overlying aquifers. To assess this impact we need to determine the background groundwater chemistry and to map geological pathways of hydraulic ...
A Green-Saxena, A Vengosh, BE Fontenot, BFJ Kelly, C Duvert, CD Keeling, CD Keeling, DDR Owen, DE Pataki, DL Valentine, DT Maher, E Dafny, ECP Kinnon, EG Nisbet, EJ Dlugokencky, G Antler, JA Hakala, JF Barker, JW Roy, K Knittel, MJ Whiticar, NG Phillips, P Quay, RB Jackson, RE Fisher, S Cuna, S Qin, SG Osborn, SK Hamilton, SK Hamilton, SL Papendick, TA Moore   +31 more
core   +1 more source

Enhanced Nitric Oxide Electroreduction to Ammonia via Modulating Spin‐Polarization of Fe Single‐Atom Catalysts

Advanced Functional Materials, EarlyView.
A strategic spin‐polarization suppression in Fe single‐atom catalysts is proposed to enhance electrocatalytic reduction of NO to NH3. Employing a top‐down electrospinning strategy, self‐supported FeSAC with Fe‐N3S1 coordination structure and spin‐state transition is engineered from high‐spin to low‐spin.
Jialing Song, Ziqi Wei, Lupeng Han, Zhenlin Wang, Chenghao Fan, Donglin Han, Chunwei Dong, Haiyan Duan, Xiyang Wang, Sam Fong Yau Li, Eslam Hamed, Ming Xie, Emiliano Cortés, Dengsong Zhang   +13 more
wiley   +1 more source

Seasonally varying contributions to urban CO2 in the Chicago, Illinois, USA region: Insights from a high-resolution CO2 concentration and δ13C record

Elementa: Science of the Anthropocene, 2015
Understanding urban carbon cycling is essential given that cities sustain 54% of the global population and contribute 70% of anthropogenic CO2 emissions. When combined with CO2 concentration measurements ([CO2]), stable carbon isotope analyses (δ13C) can
Joel Moore, Andrew D. Jacobson
doaj   +1 more source

Stable isotopes in diatom silica [PDF]

, 2010
Diatom silica is a form of biogenic opal (SiO2.nH2O, Figure 1) containing oxygen, silicon, carbon and nitrogen isotopes that can be used in lacustrine and marine paleoenvironmental studies.
Leng, Melanie J., Swann, George E.A.
core  

Sulphur-isotope compositions of pig tissues from a controlled feeding study [PDF]

, 2017
Sulphur-isotope determinations are becoming increasingly useful for palaeodietary reconstruction, but knowledge of isotopic discrimination between diet and various tissues remains inadequate. In this study, we explore the sensitivity of δ34Stissue values
Evershed, Richard P., Lewis, Jamie, Miller, Bevis, Newton, Jason, Stewart, Alan, Tarlton, John F., Webb, Emily C.   +6 more
core   +2 more sources

Trap‐Assisted Transport and Neuromorphic Plasticity in Lead‐Free 2D Perovskites PEA2SnI4

Advanced Functional Materials, EarlyView.
An artificial retina built from lead‐free layered perovskite (PEA)2SnI4 converts light input into a persistent photocurrent and sums successive flashes over time. Micro/nanocrystals integrated on electrodes act as synapse‐like pixels that perform temporal integration directly in hardware. This in‐sensor preprocessing merges detection and computation on
Ofelia Durante, Valeria Demontis, Jonas Riisnaes Karl, Lam Hoi Tung, Sebastiano De Stefano, Daniela Marongiu, Adolfo Mazzotti, Aditya Bhardwaj, Francesco Mattana, Elisa Pili, Selene Matta, Federico Paolucci, Michele Saba, Andrea Mura, Giovanni Bongiovanni, Monica F Craciun, Saverio Russo, Antonio Di Bartolomeo   +17 more
wiley   +1 more source

Using Stable Carbon and Nitrogen Isotopes to Evaluate Parrotfish Diet

Annals of Tropical Research, 2013
With limited inconclusive data provided by gut content analysis, stable isotope analysis has recently emerged to validate trophic position and dietary intake. In this study, a dual isotope approach was used to reveal parrotfish feeding.
Maria Elisa B. Gerona, Florence C. Evacitas   +1 more
doaj   +1 more source

Human pressures on two estuaries of the Iberian Peninsula are reflected in food web structure [PDF]

, 2019
As a result of the increased urban and agricultural development in coastal environments, estuaries are among the most modified and threatened aquatic ecosystems.
Donázar Aramendía, Iñigo Javier, García Asencio, Isabel, García Gómez, José Carlos, Megina Martínez, César, Miró Recio-Mensaque, Juan Miguel, Sánchez Moyano, Juan Emilio   +5 more
core   +1 more source

Gold Nanoclusters as Dual Agents for Engineering Tumor Vascular Leakiness and Performing Photothermal Therapy

Advanced Functional Materials, EarlyView.
Many cancer nanotherapeutics, while potent, suffer from the inability to escape from the tumor vasculature, especially in the absence of endothelial permeability. In this work, ultrasmall gold nanoclusters could engineer nanomaterials induced endothelial leakiness (NanoEL) and harness strong NIR induced photothermal characteristics to suppress tumor ...
Nengyi Ni, Kuoran Xing, Bihan Zhang, Baoteng Wang, Yinglu Chen, Jianping Xie, Xiao Sun, Jinping Wang, David Tai Leong   +8 more
wiley   +1 more source