Results 71 to 80 of about 154,472 (297)

Chlorine Isotope Effects from Isotope Ratio Mass Spectrometry Suggest Intramolecular C-Cl Bond Competition in Trichloroethene (TCE) Reductive Dehalogenation

Molecules, 2014
Chlorinated ethenes are prevalent groundwater contaminants. To better constrain (bio)chemical reaction mechanisms of reductive dechlorination, the position-specificity of reductive trichloroethene (TCE) dehalogenation was investigated.
Stefan Cretnik, Anat Bernstein, Orfan Shouakar-Stash, Frank Löffler, Martin Elsner   +4 more
doaj   +1 more source

Shaping Ti3C2 MXene Nanospheres for Precision Near‐Infrared Photothermal Therapy

Advanced Functional Materials, EarlyView.
In this study, we report producing spherical MXenes via fs laser fragmentation of Ti3C2 flakes in liquid medium. The nanoparticles demonstrated pronounced light absorption and high photothermal conversion efficiencies of 68% and 63% under heating with NIR‐I and NIR‐II lasers, respectively.
Julia S. Babkova, Ivan V. Zelepukin, Konstantin G. Shevchenko, Gleb V. Tikhonowski, Lyubov V. Gorelik, Anton A. Popov, Anna S. Sogomonyan, Alina Yu. Kapitannikova, Ivan S. Kazantsev, Dmitry V. Dyubo, Daria A. Panova, Daniil I. Tselikov, Anton A. Minnekhanov, Aziz B. Mirkasymov, Georgy A. Ermolaev, Alexander V. Syuy, Gleb I. Tselikov, Aleksey V. Arsenin, Andrei V. Kabashin, Kostya S. Novoselov, Sergey M. Deyev, Valentyn S. Volkov   +21 more
wiley   +1 more source

High-precision measurements of seawater Pb isotope compositions by double spike thermal ionization mass spectrometry [PDF]

, 2014
A new method for the determination of seawater Pb isotope compositions and concentrations was developed, which combines and optimizes previously published protocols for the separation and isotopic analysis of this element.
Bridgestock, L, Paul, M, Rehkämper, M, van DeFlierdt, T, Weiss, D   +4 more
core   +2 more sources

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

Geographical Origin Identification of Tequila Based on Multielement and Stable Isotopes

Journal of Food Quality, 2021
To explore the regional characteristics of multielement and stable isotopes in tequila and the viability of tracing the geographical origin, both inductively coupled plasma mass spectrometry (ICP-MS) and stable isotope ratio mass spectrometry (IRMS) were
Jian Zhang, Yiqian Ma, Feilong Shao, Yuanyu Lu, Libo Zhu, Xiansong Xu   +5 more
doaj   +1 more source

Human metabolism and elimination of the anthocyanin, cyanidin-3-glucoside: a 13C-tracer study [PDF]

, 2013
BACKGROUND: Evidence suggests that the consumption of anthocyanin-rich foods beneficially affects cardiovascular health; however, the absorption, distribution, metabolism, and elimination (ADME) of anthocyanin-rich foods are relatively unknown. OBJECTIVE:
Aedín Cassidy, Cassidy, Charles Czank, Colin D Kay, Das, Das, de Pascual-Teresa, Del Bò, Del Rio, Douglas J Morrison, Felgines, Felgines, Felgines, Garcia-Alonso, González-Barrio, Haycock, Hooper, Ichiyanagi, Kay, Kay, Kay, Manach, Mazza, McCullough, Milbury, Mink, Miyazawa, Morrison, Morrison, Morrison, Mullen, Neveu, Nigel P Botting, Nurmi, Paul A Kroon, Qingzhi Zhang, Shreeve, Slater, Tom Preston, Tsuda, Ueno, Vitaglione, Wallace, Walle, Williamson, Williamson, Woodward, Wu, Zhang, Zhang, Zhang   +50 more
core   +1 more source

The Terminal Domains of Collagen‐Like Silk Direct Molecular Interactions and Liquid–Liquid Phase Separation‐Mediated Material Assembly

Advanced Functional Materials, EarlyView.
Terminal domains of recombinant collagen‐like silk regulate hierarchical self‐assembly across molecular and material scales. We show that terminal domains of collagen‐like silk enhance triple‐helix stability and drive liquid–liquid phase separation, enabling reversible formation of fibers and self‐healing films.
Mengjie Shen, Daniil Astapov, Nur Alia Oktaviani, Mami Goto, Keiji Numata, A. Sesilja Aranko   +5 more
wiley   +1 more source

Laser Spectroscopic Measurement of Helium Isotope Ratios

, 2003
A sensitive laser spectroscopic method has been applied to the quantitative determination of the isotope ratio of helium at the level of 3He/4He = 10^-7 - 10^-5.
Bjoklund, Clarke, Craig, Hall, Kudryavtsev, Kurz, L.-B. Wang, Lupton, Ma, Mamyrin, Mamyrin, Marcantonio, Matsuda, Modugno, Morrison, Pepin, Petrov, Sano, Schlosser, Sturchio, Supplee, Torgerson, Wang, Wittenberg, Zhao   +24 more
core   +1 more source

Engineering Hydrogen‐Down Water Configurations for Ampere‐Level Electrochemical CO2 Reduction to Formate

Advanced Functional Materials, EarlyView.
Electrochemical CO2 reduction (ECR) to formate is a promising route for sustainable chemical production. Herein, we report the synthesis catalysed byBi‐HfO2@C. The AIMD simulations, DFT calculations, and in situ SEIRAS measurements show that the modification of HfO2 on the Bi surface steers the interfacial water to adopt a favorable hydrogen‐down (OH2↓)
Xiao‐Dong Guo, Shao‐Qing Liu, Jia‐Yi Wu, Qi‐Rui Wen, Xiaoxiao Wei, Shu‐Wen Wu, Xian‐Zhu Fu, Jing‐Li Luo   +7 more
wiley   +1 more source

Proposal for International Agreement on Ca Notation resulting from discussion at workshops on stable isotope measurement held in Davos (Goldschmidt 2002) and Nice (EGS-AGU-EUG 2003) [PDF]

, 2004
A proposal is made to standardise the reporting of Ca isotope data to the δ44Ca/40Ca notation (or δ44Ca/42Ca) and to adopt NIST SRM 915a as the reference ...
Bock, Barbara, Eisenhauer, Anton, Fietzke, Jan, Gussone, Nikolaus, Hippler, Dorothee, Kramers, Jan, Nägler, Thomas F., Schmitt, Anne-Désirée, Stille, Peter   +8 more
core   +1 more source