Results 161 to 170 of about 16,901 (243)

Detection of Testosterone Esters in Urine: Evidence of Trace‐Level Detectability in Doping Control Samples

open access: yesDrug Testing and Analysis, EarlyView.
An ultrasensitive LC‐MS/MS method for detecting testosterone esters (T‐esters) in urine at sub–pg/mL levels is presented. This approach, employing Girard P derivatization, provides the first evidence of T‐esters' trace‐level detectability in human urine.
Daniel Pecher   +3 more
wiley   +1 more source

Engineering Zn Powder Anodes for Advanced Aqueous Zn‐Based Batteries

open access: yesEcoEnergy, EarlyView.
Zn powder (ZnP) anodes have attracted growing interest in aqueous Zn‐based batteries (AZBs) because they enable high Zn utilization, relaxed mechanical constraints, and versatile electrode fabrication. This review systematically summarizes recent advances in ZnP anodes, focusing on crystallographic engineering, interfacial regulation, electrode ...
Xiaona Fu   +6 more
wiley   +1 more source

Improved Incorporation of Arylglycines Into Ramoplanin Sequences via Solid‐Phase Peptide Synthesis

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
The incorporation of arylglycines using solid‐phase peptide synthesis remains challenging due to the sensitivity of these residues for epimerization. Here, exploring multiple conditions for the incorporation of arylglycine residues into peptides using SPPS demonstrates how small changes to current synthesis protocols can lead to significant ...
Edward Marschall   +3 more
wiley   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Chiral HPLC Separation of Phosphonothrixin and Phosphonate Derivatives and Electronic Circular Dichroism Characterization of the Isolated Enantiomers

open access: yesELECTROPHORESIS, EarlyView.
Natural compound phosphonothrixin's herbicidal activity resides exclusively in its (S)‐enantiomer, yet existing enantioselective syntheses are cumbersome, and direct chiral LC separation is hampered by the compound's high polarity, lack of aromatic groups, and metal chelation–induced peak tailing.
Mirna Maalouf   +8 more
wiley   +1 more source

Prognostic model for osteoarthritis combining imaging and clinical biomarkers. [PDF]

open access: yesFront Med (Lausanne)
Yuan L   +5 more
europepmc   +1 more source

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