Results 131 to 140 of about 34,436 (236)

Skylab atmospheric contamination control [PDF]

The Skylab contamination removal systems, preflight analysis and testing, and flight results are described. Results indicate that the combination of materials selection, the onboard removal devices, and the offgassing tests proved to be an effective ...
Ray, C. D.
core   +1 more source

The folic acid antagonists and their use is the treatment of acute leukemia [PDF]

, 1954
Thesis (M.D.)--Boston ...
Boyd, George K.
core  

Two‐Step Synthesis of a Chiral Fluorinated Alcohol With Silica‐Supported Enzyme RrADH in Batch and Continuous Flow Mode

Chemistry – A European Journal, Volume 32, Issue 16, 25 April 2026.
A two‐step process was transferred from batch to flow mode for the synthesis of (R)‐2‐fluoro‐1‐phenylethanol as a benchmark, consisting of a decarboxylative fluorination in aqueous media, followed by an enantioselective biocatalytic reduction of the prochiral intermediate with RrADH immobilized on silica supraparticles.
Egzon Cermjani, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Doris Hanselmann, Bettina Herbig, Susanne Wintzheimer, Thomas H. Rehm   +7 more
wiley   +1 more source

XXVIII.—Formation of ethylic dihydroxydinicotinate from ethylic cyanacetate [PDF]

J. Chem. Soc., Trans., 1898
Siegfried Ruhemann, K. C. Browning
openaire   +1 more source

Nickel Nanoparticles Prepared via Colloidal Synthesis as CO2 Hydrogenation Catalysts on Various Support Materials

Advanced Synthesis &Catalysis, Volume 368, Issue 8, 15 April 2026.
Small aromatic ligands are used to synthesize Ni particles between 1 and 4.4 nm. After deposition on various supports, an alkylating agent and subsequent reduction procedure are used to remove the ligands. On SiO2, the Ni particles remained small, but on Al2O3 they sintered severely.
Bram T. Kappé, Metin Sen, Esther Groeneveld, Savannah Turner, Ward van der Stam, Matteo Monai, Bert M. Weckhuysen   +6 more
wiley   +1 more source

Synthesis of Sulfur Heterocycles by Palladium‐Catalyzed Cyclization

European Journal of Organic Chemistry, Volume 29, Issue 14, 15 April 2026.
In spite of the well‐known palladium thiophilicity, sulfur‐containing acyclic substrates may efficiently undergo several different kinds of palladium‐catalyzed cyclization processes leading to highly important sulfur heterocycles in one synthetic step. Advances in this challenging and stimulating field of research are presented in this review.
Bartolo Gabriele
wiley   +1 more source

Transfer Hydrogenation of Organic Azides to Amines by Ammonia Borane Complex Under Mild Conditions Catalyzed by Reusable Au Nanoparticles

European Journal of Organic Chemistry, Volume 29, Issue 14, 15 April 2026.
Organic azides are readily reduced to amines under mild conditions by ammonia borane complex, catalyzed by a low loading level of reusable Au nanoparticles supported on TiO2. We present the first protocol for the chemoselective reduction of organic azides to amines by ammonia borane complex. In the presence of a low catalytic amount of Au nanoparticles
Elisavet‐Maria Zantioti‐Chatzouda, Dimitra Malliotaki, Ioannis Zachilas, Andreas‐Drakos Kokkinos, Orestis Agathocleous, Manolis Stratakis   +5 more
wiley   +1 more source

Synthesis of Polyhydroxylated Pyrrolidinyl Analogs of Sugar Nucleotides. Experimental and Computational Studies on Their Interactions With GalNAC‐T's

ChemBioChem, Volume 27, Issue 7, 14 April 2026.
A multidisciplinary approach based on organic synthesis supported by quantum mechanical calculations, efficient phosphorylation methods, affinity studies using conventional techniques and saturation transfer difference nuclear magnetic resonance, together with molecular dynamics simulations, has enabled the preparation of nucleotide analogs with ...
Pedro Merino, Veronica Juste, Alejandro Montesa, Sandra Pereira, Sara Orta, Manuel Pedrón, Ana I. Jiménez, Sonsoles Martín‐Santamaría, Ramón Hurtado‐Guerrero, Ignacio Delso, Tomás Tejero   +10 more
wiley   +1 more source

Physicochemical Properties and Antioxidant Capacity and Volatile Compound Changes during the Fermentation of Chinese Prune Jiaosu

Shipin gongye ke-ji
Using prunes as the raw material, Chinese prune Jiaosu was prepared by co-inoculating yeast and lactic acid bacteria for fermentation. This study investigated the dynamic changes in physicochemical properties and antioxidant capacity of Chinese prune ...
Yu ZHAO, Qingping DU, Rui YANG, Wei LI, Wei LI, Lusi ZHANG, Xuewen LI, Wei WANG   +7 more
doaj   +1 more source

2‐Phenylquinolines Exhibit Anti‐Severe Acute Respiratory Syndrome Coronavirus‐2 Activity Through the Nonstructural Protein 13 Helicase Inhibition

ChemMedChem, Volume 21, Issue 7, 14 April 2026.
A SAR study led to the identification of new 2‐phenylquinoline‐based derivatives that exhibit anti‐Severe Acute Respiratory Syndrome Coronavirus‐2 (SARS‐CoV‐2) activity by acting as ATP‐competitive inhibitors of nonstructural protein 13 (nsp13) helicase.
Giada Cernicchi, Maria Giulia Nizi, Roberta Emmolo, Leentje Persoons, Manon Laporte, Dirk Jochmans, Isabella Romeo, Giacomo Pepe, Ciro Milite, Pietro Campiglia, Jacopo Spezzini, Alma Martelli, Simone Brogi, Francesca Esposito, Tommaso Felicetti, Serena Massari, Giuseppe Manfroni, Stefano Sabatini, Gianluca Sbardella, Stefano Alcaro, Johan Neyts, Angela Corona, Enzo Tramontano, Steven De Jonghe, Oriana Tabarrini   +24 more
wiley   +1 more source