Results 141 to 150 of about 24,904 (238)

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

Tracing contamination in mining areas through sulfur and oxygen isotopes in groundwater sulfates: a case study from the Apuan Alps (Italy). [PDF]

Environ Geochem Health
Natali S, Franceschi L, Giannecchini R, D'Orazio M, Delgado-Huertas A, Zanchetta G, Doveri M.   +6 more
europepmc   +1 more source

Key Drivers of Activity and Selectivity in Cu‐Based Catalysts for Methanol Synthesis From CO2: Insights From Atomically Dispersed Promoters

Angewandte Chemie, EarlyView.
Mechanistic studies on model Cu─M/SiO2 catalysts (M = Zn, Ga, and In) reveal that promoters enable a formate spillover pathway from Cu to Mn+ (n = 2 or 3) sites. The promoter's electronic effect on formate bond strengths serves as a quantitative descriptor for activity and selectivity, balancing spillover dynamics with intermediate stabilization to ...
Nat Phongprueksathat, Gina Noh, Scott R. Docherty, Damian Vico van Berkel, Yannik Stiefel, Christophe Copéret, Atsushi Urakawa   +6 more
wiley   +2 more sources

Highly enriched carbon and oxygen isotopes in carbonate-derived CO₂ at Gale crater, Mars. [PDF]

Proc Natl Acad Sci U S A
Burtt DG, Stern JC, Webster CR, Hofmann AE, Franz HB, Sutter B, Thorpe MT, Kite ES, Eigenbrode JL, Pavlov AA, House CH, Tutolo BM, Des Marais DJ, Rampe EB, McAdam AC, Malespin CA.   +15 more
europepmc   +1 more source

Strontium and oxygen isotopes as indicators of Longobards mobility in Italy: an investigation at Povegliano Veronese. [PDF]

Sci Rep, 2020
Francisci G, Micarelli I, Iacumin P, Castorina F, Di Vincenzo F, Di Matteo M, Giostra C, Manzi G, Tafuri MA.   +8 more
europepmc   +1 more source

Modulating Local Coordination in Single‐Atom Catalysts: From Fundamental Concepts to Emerging Breakthroughs in Electrocatalysis

Angewandte Chemie, EarlyView.
This review summarizes atomic‐level design strategies for single‐atom catalysts, emphasizing modulation of the local coordination environment, active‐site geometry, and metal‐support interactions to optimize catalytic activity and stability in electrocatalytic energy conversion applications.
Ashwani Kumar, Harun Tüysüz
wiley   +2 more sources

Reconstructing the experienced temperature during the larval oceanic migration of anguillid eels from otolith stable oxygen isotopes. [PDF]

Sci Rep
Kuroki M, Hayasaka S, Nishida K, Ishimura T, Okamura A, Yamada Y, Han YS, Shirai K.   +7 more
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   +2 more sources

Generation of the Camptothecin Scaffold by a Flavin‐Catalyzed Photooxidative Skeletal Reorganization

Angewandte Chemie, EarlyView.
The biosynthetic pathway of the anticancer drug precursor camptothecin involves an enigmatic skeletal reorganization from a 6/5/6 tetrahydro‐β‐carboline to a 6/6/5 pyrroloquinoline ring system. Here, we show that this transformation can be achieved by photooxidation with flavin cofactors, such as flavin mononucleotide (FMN) as catalysts.
Shenyu Liu, Zeliang Zhang, Benedikt Seligmann, Van Hung Bui, Tuan‐Anh Minh Nguyen, Thu‐Thuy T. Dang, Jakob Franke   +6 more
wiley   +2 more sources

Oxygen isotopes in orangutan teeth reveal recent and ancient climate variation. [PDF]

Elife
Smith TM, Arora M, Austin C, Nunes Ávila J, Duval M, Lim TT, Piper PJ, Vaiglova P, de Vos J, Williams IS, Zhao JX, Green DR.   +11 more
europepmc   +1 more source