Results 111 to 120 of about 7,353 (249)

Mechanistic Dichotomy in Enantioselective Pd‐Catalyzed Alkylation of Pyrroles With Diazoesters

European Journal of Organic Chemistry, EarlyView.
Ligand‐controlled mechanistic divergence controls the Pd‐catalyzed asymmetric alkylation of pyrroles with diazoesters. While bipyridine ligands promote a conventional metal‐carbene pathway, bipyridine‐N,N′‐dioxide ligands redirect catalysis through electrophilic CH metalation before carbene transfer.
Vladimir Yu. Vaganov, Yasuaki Fukazawa, Svyatoslav M. Pechenkin, Vladimir S. Hein, Aleksandr E. Rubtsov, Andrei V. Malkov   +5 more
wiley   +1 more source

Sedimentary sulfur isotopes and Neoarchean ocean oxygenation. [PDF]

Sci Adv, 2018
Fakhraee M, Crowe SA, Katsev S.
europepmc   +1 more source

π‐Extended Silyl Enolates as Emerging Platforms in Radical Chemistry

European Journal of Organic Chemistry, EarlyView.
This review covers the emerging role of π‐extended silyl polyenol ethers in radical chemistry. It highlights their versatile roles as electron‐rich SOMOphiles, silyl radical cation precursors, and nucleophilic partners in radical–polar crossover manifolds, while considering recent advances in photoredox catalysis, electrochemistry, and transition metal‐
Debora Guazzetti, Kelly Bugatti, Claudio Curti, Franca Zanardi   +3 more
wiley   +1 more source

Sulfur isotopes ratio of atmospheric carbonyl sulfide constrains its sources. [PDF]

Sci Rep, 2019
Angert A, Said-Ahmad W, Davidson C, Amrani A.   +3 more
europepmc   +1 more source

Stage‐Dependent Metabolic Reprogramming Drives a Self‐Organizing Microbial Network During Shanxi Aged Vinegar

Food Bioengineering, EarlyView.
Metabolic shifts from growth to stress adaptation in Shanxi aged vinegar fermentation link flavor maturation and microbial cooperation, and Lactobacillus and Acetobacter form a self‐organizing metabolic network through division of labor. ABSTRACT Acetic acid fermentation (AAF) is a vital stage in the production of Shanxi aged vinegar (SAV), during ...
Yanfang Wu, Jing Liu, Dantong Liu, Menglei Xia, Jia Song, Yu Zheng, Min Wang   +6 more
wiley   +1 more source

Strategies for Identification and Mitigation of Sanguinarine in Mustard Oil Adulterated by Argemone—A Comprehensive Review

Food Chemistry International, EarlyView.
Sanguinarine, a toxic alkaloid present in argemone, can lead to epidemic dropsy or chronic diseases through DNA intercalation and immune system suppression. Regulatory efforts face challenges due to economic motivations for adulteration as well as technical, social, and infrastructure barriers.
Gururaj Pejavara Narayana, Subhangi Panigrahi, Suresh Kumar Kalakandan, Hema Vincent, Ashish Rawson   +4 more
wiley   +1 more source

Electrochemical fractionation of stable sulfur isotopes in a rechargeable lithium-sulfur battery: a revisit from the law of mass conservation. [PDF]

Chem Sci
Zhu YH, Xin S.
europepmc   +1 more source

Monitoring and Mitigation Strategies for Hazardous Compounds in Chinese Rice Wine (Huangjiu): A Comprehensive Review

Food Safety and Health, EarlyView.
This review elucidates the formation pathways and detection technologies for ethyl carbamate, biogenic amines, and higher alcohols in Huangjiu. It concludes that integrated control frameworks are essential to decouple safety risks from the metabolic processes responsible for flavor development.
Lulu Liu, Zhiqiang Kong, Lin Li, Yifan Zhang, Bei Fan, Minmin Li   +5 more
wiley   +1 more source

Sulfur Isotopes Reveal Spatial Variation in Waterbird Trace Element Contamination from Tropical Estuaries to the Open Ocean. [PDF]

Environ Sci Technol
Linhares BA, Bustamante P, Nunes GT, Costa PG, Bugoni L, Zebral YD, Orselli IBM, Martins CMG, Bianchini A.   +8 more
europepmc   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

Geological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia, Ryohei Takahashi, Andrea Agangi, Pearlyn Manalo, Hinako Sato   +4 more
wiley   +1 more source