Results 251 to 260 of about 435,222 (363)

Unlocking efficiency in column chromatography with packed bed supporting inserts. [PDF]

Front Bioeng Biotechnol
Fancy RM, Abraham DH, Taylor MR, McMullin C, Brann NS, Bailey DM, Brown DI, Horne HB, Wolfe LS.   +8 more
europepmc   +1 more source

Microlasers Made Entirely from Edible Substances

Advanced Optical Materials, EarlyView.
Several types of microlasers made completely out of edible substances are developed. They can be embedded directly into edible products and enable the sensing of various parameters, including sugar concentration, pH, the presence of bacteria, and exposure to too‐high temperatures.
Abdur Rehman Anwar, Maruša Mur, Georgia Michailidou, Dimitrios N. Bikiaris, Matjaž Humar   +4 more
wiley   +1 more source

Dynamic Structural Colors in Cholesteric Cellulose Composites: Achieving Spatial and Temporal Control

Advanced Optical Materials, EarlyView.
By combining static and time‐resolved optical, structural, and rheological techniques, we demonstrate that the blue‐shift upon solidification of ethyl cellulose‐acrylic acid mesophases corresponds to the reorientation of cholesteric domains. Modulating the mesophase chain mobility and photopolymerization reaction kinetics enables solid chiral nematic ...
Simona G. Fine, Charmaine Guo, Cécile A. C. Chazot   +2 more
wiley   +1 more source

Visible Light‐Promoted Esterification of Carboxylic Acids via Photoacid Generation Catalysis

Advanced Synthesis &Catalysis, EarlyView.
A novel, environmentally friendly photochemical method for the esterification of carboxylic acids with alcohols using arylazo sulfones as photoacid generators was developed. This approach avoids traditional acidic catalysts, purification did not require chromatography and the method proved effective under continuous flow conditions for enhanced ...
Valentina Benazzi, Periklis X. Kolagkis, Lorenzo di Terlizzi, Eirini M. Galathri, Olga G. Mountanea, Maurizio Fagnoni, Stefano Protti, Christoforos G. Kokotos   +7 more
wiley   +1 more source

An update on latest regulatory guidelines and analytical methodologies for N-nitrosamine impurities in pharmaceutical products - 2024. [PDF]

Med Gas Res
Manchuri KM, Kuril AK, Shaik MA, Gopireddy VSR, Sultana N.   +4 more
europepmc   +1 more source

Synthesis of spirolactones from carbonyls via carboborylation of N‐sulfonylhydrazones with alkoxycarbonylalkylboronic acids

Advanced Synthesis &Catalysis, Accepted Article.
A straightforward synthesis of spirolactones from carbonyls via N‐tosylhydrazones is described. The process consist in the reaction between the N‐tosylhydrazone and ethoxycarbonylethylboronic acid or ethoxycarbonylpropylboronic acid, leading to spiro γ‐butyrolactones or δ‐valerolactones respectively. The transformation takes place by carboborylation of
Lucía López, Sara Filgueira, María-Paz Cabal, Alfonso Carlos Valdés-Gómez   +3 more
wiley   +1 more source

Development of Photo‐Biocatalytic Redox System for Asymmetric Synthesis of Optically Active Amines Using Blue Light and Transaminases. A Case Study Toward Mavacamten

Advanced Synthesis &Catalysis, EarlyView.
Abstract α‐Chiral amines are versatile building blocks for the asymmetric synthesis of optically pure high‐added‐value chemicals, including pharmaceuticals, agrochemicals, and natural products. Herein, we report a one‐pot, two‐step sequential deracemization of racemic sec‐alcohols to optically enriched primary amines throught a photo‐biocatalytic ...
Natalia Antos, Aleksandra Rudzka, Anna Hoser, Tamara Reiter, Wolfgang Kroutil, Paweł Borowiecki   +5 more
wiley   +1 more source

(7E)-7,8-Dehydroheliobuphthalmin from <i>Platycladus orientalis</i> L.: Isolation, Characterization, and Hair Growth Promotion. [PDF]

Int J Mol Sci
Lin Z, Sun Y, Li C, Zhou X, Guo Y, Wang Z, Li G.   +6 more
europepmc   +1 more source

Development of Hydrofluoroolefin (HFO)‐Based Direct O‐Fluoroalkenylation of Phenols Targeting Tyrosine Conjugation

Advanced Synthesis &Catalysis, EarlyView.
Abstract Methodology for direct fluoroalkenylation of phenolic OH function was developed using a fluorinated electrophilic reagent derived from HFO1234ze gas. Besides various functionalized phenols, tyrosine and tyrosine‐based peptides were successfully conjugated under the optimized reaction conditions.
Rihárd Sisa, Ferenc Béke, Zoltán Novák   +2 more
wiley   +1 more source