Results 171 to 180 of about 3,681,214 (292)

Between Mosses and Microbes: Stable Isotopes (¹⁵N/¹⁴N, ¹³C/¹²C) Clarify the Trophic Niches of Oribatid Mites on a High-Arctic Permafrost Archipelago (Svalbard, Norway). [PDF]

Ecol Evol
Maraun M, Clausen Kaiser R, Coulson SJ, Pan X, Scheu S, Seniczak A.   +5 more
europepmc   +1 more source

Cysteine Thioaldehydes: Photolytic Generation, Reactivity, and Biological Implications

Angewandte Chemie, EarlyView.
Photolysis of cysteine phenacylsulfides bearing non‐conjugating electron‐withdrawing substituents leads to high conversions into cysteine thioaldehydes through a Norrish type‐II pathway. This methodology enabled the study of the aqueous reactivity of these important biosynthetic intermediates, which, depending on peptide sequence, pH and buffer ...
Ardra Karthika, Matthew Murray, Guillermo Palop, Lee‐Ann J. Keane, Patrick McArdle, Nicholas D. J. Yates, Christopher D. Spicer, Alison Parkin, Martin A. Fascione, Eddie L. Myers   +9 more
wiley   +2 more sources

From Wartime Nuclear Physics to Isotope Science: George Page and the Foundations of New Zealand Mass Spectrometry. [PDF]

J Mass Spectrom
Faure K, Phillips A.
europepmc   +1 more source

Methanol-specific methyltransferase isozymes have large carbon kinetic isotope effects that impact methane isotopic signatures. [PDF]

Appl Environ Microbiol
Gropp J, Bill M, Stolper DA, Nayak DD.
europepmc   +1 more source

A Multi-Isotope Approach (δ²H, δ¹⁸O, δ¹³C, δ¹⁵N) for Discriminating Raspberry Production Systems and Assessing Agroecosystem Functioning. [PDF]

Molecules
Ionete RE, Costinel D, Simionescu AM, Miricioiu MG, Pruteanu A, Istrate AI, Botoran OR.   +6 more
europepmc   +1 more source

Electron Bridge Enhanced Charge Polarization Enables Efficient and Ultra‐Long Stable Urea Electrosynthesis

Angewandte Chemie, EarlyView.
An electron bridge strategy is developed to regulate charge polarization in Pd1 and Ni1 dual single‐atom sites, promoting CO2 reduction, nitrate reduction, and C–N coupling simultaneously. The resulting catalyst achieves efficient urea electrosynthesis with high activity and record durability over 1700 h.
Fan Wu, Haixia Wang, Wei Wang, Junrong Zou, Ruijie Zhou, Fenglin Xie, Peng Gao, Weiliu Fan, Nana Wang, Zhongchao Bai, Guoxiu Wang, Wei Ye   +11 more
wiley   +1 more source

Bioconversion of β-carotene to vitamin A across life stages using stable isotope methodologies: a protocol for the systematic review. [PDF]

Syst Rev
Frane RD, Lat HT, Semilla JJL, Diaz JMS, Zumaraga MPP.   +4 more
europepmc   +1 more source

Heavy‐Atom Tunneling at Room Temperature Revealed by Instanton Theory

Angewandte Chemie, EarlyView.
Usually, tunneling does not play a significant role in chemical reactions except at low temperature, especially when heavy atoms are involved. However, using nonadiabatic instanton theory we find that heavy‐atom tunneling dominates the reaction mechanism for spin‐forbidden processes in the synthesis of strained organic molecules even at room ...
Debaarjun Mukherjee, Kamil D. Petryczkiewicz, Jeremy O. Richardson   +2 more
wiley   +1 more source

An Improved EA-IRMS Method Using V₂O₅-Assisted Combustion for Carbon Isotope Analysis of High-Temperature and High-Pressure Metamorphic Graphite. [PDF]

J Mass Spectrom
Hongwei L, Lianjun F, Junjie X, Lei Z.
europepmc   +1 more source

Direct Solar Power‐Driven Durable Ammonia Electrosynthesis From Nitrate Under Fluctuating Voltage Conditions

Angewandte Chemie, EarlyView.
Isolated Sn sites on Cu(111) induce a highly asymmetric charge distribution, which promotes water dissociation, accelerates key intermediate hydrogenation, and suppresses competing hydrogen evolution. As a result, SnCu111 delivers NH3 Faradaic efficiencies above 90% over an 800 mV potential window and enables stable direct solar power‐driven NH3 ...
Xiaokang Wang, Jiankun Li, Liyun Wu, Sirui Tang, Chuangwei Liu, Jianping Yang, Qilong Wu, Xiangdong Yao, Jun Chen   +8 more
wiley   +1 more source