Results 61 to 70 of about 2,400,643 (255)

The effectiveness of using carbonate isotope measurements of body tissues to infer diet in human evolution: Evidence from wild western chimpanzees (Pan troglodytes verus)* [PDF]

, 2015
Changes in diet throughout hominin evolution have been linked with important evolutionary changes. Stable carbon isotope analysis of inorganic apatite carbonate is the main isotopic method used to reconstruct fossil hominin diets; to test its ...
Boesch, Christophe, Richards, M. ; https://orcid.org/, Hublin, Jean-Jacques, Fahy, Geraldine, Fahy, G. ; https://orcid.org/, Richards, Michael P., Boesch, C. ; https://orcid.org/, Hublin, J. ; https://orcid.org/   +7 more
core   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Computational Mass Transfer Study of Special High-efficiency Packing Used in the Separation of Carbon-13

Journal of Isotopes, 2020
The separation of stable isotope carbon-13（13C） is very difficult because the separation coefficient is only 1.007. So it is necessary that nearly three thousand theoretical stages should be required to obtain a high abundance product of 99 atom% 13C. In
TIAN Yesheng;LI Hulin
doaj   +1 more source

Pulsed Oxidative–Reductive Electrolysis Over Dual Cu and Co Single‐Atom Sites for Urea Electrosynthesis

Advanced Materials, EarlyView.
Alternating oxidative–reductive pulses synchronize CO2‐derived *CO and NH3‐derived *NHx intermediates over dual Cu and Co single‐atom sites, enabling urea and ethyl urea formation with a total C─N Faradaic efficiency of 42 ± 4%. In situ spectroscopy and theoretical calculations elucidate complementary Cu and Co functions, while oxidative controls ...
Putri Ramadhany, Peiqi Qiu, Thành Trần‐Phú, Denny Gunawan, Bernt Johannessen, Rosalie K. Hocking, Yan Jiao, Rose Amal, Rahman Daiyan   +8 more
wiley   +1 more source

Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse

Nature Communications, 2019
The exact freshwater scenario that caused the 8.2 ka cold event is still debated. This study presents new evidence for a severe Labrador shelfwater freshening 8500 years ago that was caused by the Hudson Bay Ice Saddle collapse following a warming in ...
Annalena Antonia Lochte, Janne Repschläger, Markus Kienast, Dieter Garbe-Schönberg, Nils Andersen, Christian Hamann, Ralph Schneider   +6 more
doaj   +1 more source

Syntheses of Stable Isotope ［13C］/D Labelled p-Methoxybenzoic Acid

Journal of Isotopes, 2020
Stable isotope labelled p-methoxybenzoic acid is an important intermediate in the synthesis of stable isotope labelled preservative, anti-microbial, anti-fungal, spices, and other internal standard reagentsspices, drugs and other compounds.
WANG Wei;DU Xiaoning;XU Jianfei;LEI Wen
doaj   +1 more source

Synthesis of Stable Isotope Deuterium Labeled Levofloxacin-D3

Journal of Isotopes, 2023
In order to improve the stable isotope utilization rate, a simple and inexpensive synthesis method was developed. The synthesis of levofloxacin is based on piperazine as the starting material, and the reaction with carbobenzoxy chloride (CBZ-Cl) to get ...
XU Zhong jie;ZHANG Li;SUN Wen;ZHANG Pengshuai;LEI Wen
doaj   +1 more source

Determining trophic niche width: a novel approach using stable isotope analysis [PDF]

, 2004
1. Although conceptually robust, it has proven difficult to find practical measures of niche width that are simple to obtain, yet provide an adequate descriptor of the ecological position of the population examined. 2.
Bearhop, S., Bearhop, Stuart, Fuller, R.A., Waldron, S., Adams, C.E., Macleod, H., Fuller, Richard A., Adams, Colin E., Waldron, Susan   +8 more
core   +1 more source

Adaptive Supramolecular Interactions Govern Redox‐Active Molecules in Aqueous Redox Flow Batteries

Advanced Materials, EarlyView.
Adaptive supramolecular interactions overcome the solubility‐stability trade‐off in aqueous redox flow batteries. Hydrophobic anions disrupt intrinsic π–π stacking to enable high solubility, while redox‐state‐dependent spin pairing and cation coordination dynamically stabilize reactive intermediates during operation.
Vikram Singh, Seongyeon Kwon, Giu A. Silva Testa, Ariyeong Yun, Yohan Kim, Yunseop Choi, Dongwook Kim, Seongmo Ahn, Minyoung Shim, Jongcheol Seo, Evan Wenbo Zhao, Mu−Hyun Baik, Hye Ryung Byon   +12 more
wiley   +1 more source

In Situ Growth of Halophilic Bacteria in Saline Fracture Fluids from 2.4 km below Surface in the Deep Canadian Shield

Life, 2020
Energy derived from water-rock interactions such as serpentinization and radiolysis, among others, can sustain microbial ecosystems deep within the continental crust, expanding the habitable biosphere kilometers below the earth’s surface.
Regina L. Wilpiszeski, Barbara Sherwood Lollar, Oliver Warr, Christopher H. House   +3 more
doaj   +1 more source