Results 71 to 80 of about 139,467 (313)

Groundwater recharge mechanisms inferred from isoscapes in a complex tropical mountainous region

Geophysical Research Letters, 2016
Stable isotope variations and groundwater recharge mechanisms remain poorly understood across the tropics, particularly in Central America. Here stable isotopes (δ18O and δ2H) in groundwater, surface water, and rainfall are used to produce high ...
Ricardo Sánchez‐Murillo, Christian Birkel   +1 more
doaj   +1 more source

Seasonality at the equator: isotope signatures and hormonal correlates of molt phenology in a non-migratory Amazonian songbird

Frontiers in Zoology, 2018
Background Birds, across their annual cycle, progress through sequences of life-history stages such as reproduction and molt. The mechanisms that control annual avian itineraries involve endocrine responses triggered by seasonal environmental factors ...
Rene Quispe, Elizabeth Yohannes, Manfred Gahr   +2 more
doaj   +1 more source

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

Differences in the isotopic composition of individual grains and aggregated seed samples affect interpretation of ancient plant cultivation practices

Frontiers in Environmental Archaeology
The stable carbon (δ13C) and nitrogen (δ15N) isotope analysis of charred archaeological grains provides a remarkably precise scale of information: the growing conditions under which a plant was cultivated in a single field and season. Here we investigate
Nathaniel James, Nathaniel James, Christine Winter-Schuh, Christine Winter-Schuh, J. Mark Kenoyer, Jade D'Alpoim Guedes, Cheryl A. Makarewicz, Cheryl A. Makarewicz, Cheryl A. Makarewicz   +8 more
doaj   +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

Stable isotope geochemistry

Eos, Transactions American Geophysical Union, 1971
A review of oxygen isotope geochemistry is presented by Garlick [1969] in the Handbook of Geochemistry. Oxygen isotope geochemistry was also the subject of a chapter by Epstein and Taylor [1967] in Researches in Geochemistry.In Geochemistry of Hydrothermal Ore Deposits, a review chapter on the application of oxygen isotopes was written by Taylor [1967],
openaire   +1 more source

Stable carbon isotope ratios of selected fatty acid markers during an Arctic sea ice algal bloom on landfast ice and in water near the settlement of Svea, in Van Mijenfjorden, Spitsbergen

, 2020
Eva Leu, Thomas A. Brown, Martin Graeve, Józef Wiktor, Clara J. M. Hoppe, Melissa Chierici, Agneta Fransson, Sander Verbiest, Ane C Kvernvik, Michael Greenacre   +9 more
openalex   +2 more sources

18O Stable Isotope Labeling in MS-based Proteomics [PDF]

, 2009
Xiaoying Ye, Brian T. Luke, Þorkell Andrésson, Josip Blonder   +3 more
openalex   +1 more source

Dual‐Site Ru Single‐Atoms and RuP Nanoclusters on N, P, and B Co‐Doped Porous Carbon for Efficient Alkaline HER and AEM Water Electrolysis

Advanced Functional Materials, EarlyView.
Ru single atoms and RuP nanoclusters are co‐anchored in N, P, and B co‐doped porous carbon nanospheres via in situ carbonization/phosphidation of a boronate polymer precursor. RuP activates water, while nearby Ru single atoms accelerate H2 formation through H* transfer. The catalyst delivers low overpotential and high durability in alkaline HER and AEM
Xiaohong Wang, Juguo Dai, Dongxu Li, Jianghua Wu, Hucheng Fu, Yiting Xu, Xueqiang Qi, Qian Xue, Yanbin Shen, Xiaoqing Pan, Conghui Yuan, Shuifen Xie, Andreu Cabot, Lizong Dai   +13 more
wiley   +1 more source

Engineered Protein‐Based Ionic Conductors for Sustainable Energy Storage Applications

Advanced Materials, EarlyView.
Rational incorporation of charged residues into an engineered, self‐assembling protein scaffold yields solid‐state protein films with outstanding ionic conductivity. Salt‐doping further enhances conductivity, an effect amplified in the engineered variants. These properties enable the material integration into an efficient supercapacitor.
Juan David Cortés‐Ossa, Paolo Blesio, Marcial Fernandez‐Castro, Lisa Almonte, Maxence Fernandez, Mantas Liutkus, Perumal Pandurangan, Carlos Sabater, Aitor Villaverde, Manuel Melle‐Franco, Nurit Ashkenasy, Felipe Jiménez‐Ángeles, M. Carmen Morant‐Miñana, M. Reyes Calvo, Aitziber L. Cortajarena   +14 more
wiley   +1 more source