Results 101 to 110 of about 25,392 (338)

Dynamic Control of Nucleic Acids Self‐Assembly and Expression Using Photoswitches

Chemistry – A European Journal, EarlyView.
We review here the recent progress made in the design of molecular photoswitches, and highlight their implementation for the dynamic control over nucleic acids self‐assembly and expression. ABSTRACT Synthetic nucleic acids have become readily available and now constitute versatile building blocks in materials science—where they can be used to engineer ...
Noemí Nogal, Hugo Laigle, Maxime Mansy, Sébastien Ulrich, Mathieu Surin   +4 more
wiley   +1 more source

Diastereoselective synthesis of some novel benzopyranopyridine derivatives

Beilstein Journal of Organic Chemistry, 2006
BackgroundThe formation of novel N-substituted-1,2,3,4-tetrahydro[1,3]-dioxolo-[6,7]-5H-[1]benzopyrano [3,4-c]pyridines were observed unexpectedly during the acid-mediated ketal removal of ethylenedioxy ketal protected 4-piperidones.
Pradeep K. Mohakhud, Sujeet M. R. Kumar, Vasanth M. R. Kumar, Ravi M. R. Kumar, Moses D. R. Babu, Vyas D. R. K, Om D. R. Reddy   +6 more
doaj   +1 more source

Strain Release of 1‐Azabicyclo[1.1.0]butanes as a Gateway to Highly Functionalized Azetidines: New Strategies and Structural Motifs

Chemistry – A European Journal, EarlyView.
Over the past decade, the interest in azetidines has continuously risen, by virtue of their highly appealing pharmaceutical properties. Monocyclic, spirocyclic, and bridged azetidines can be accessed by leveraging 1‐azabicyclo[1.1.0]butanes as precursors.
Yuri Gelato, Philipp Natho, Marco Colella, Renzo Luisi   +3 more
wiley   +1 more source

Preparation of indole alkaloids via 1,4-dihydropyridine stage or cyano-masked iminium intermediates [PDF]

, 2004
Methods to synthesise substituted pyridine derivatives utilising 1,4-dihydropyridines were studied. Addition of nucleophiles to N-alkyl pyridinium salts and application of the products to alkaloid synthesis were investigated.
Putkonen, Tiina
core  

Positive allosteric modulators of the a-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor [PDF]

, 2010
L-glutamate is the major excitatory neurotransmitter in the mammalian central nervous system (CNS) and plays a fundamental role in the control of motor function, cognition and mood.
Grove, Simon J .A., Jamieson, Craig, Maclean, John K. F., Morrow, John A., Rankovic, Zoran   +4 more
core   +1 more source

Chemical Straightening as a Source of Analytical Variability in Hair Testing: A Dual‐Analyte Case Report

Drug Testing and Analysis, EarlyView.
ABSTRACT Hair analysis is increasingly used in forensic toxicology; however, result interpretation may be influenced by cosmetic hair treatments. Although the effects of bleaching, dyeing, and thermal straightening have already been evaluated, data on permanent chemical hair straightening are scarce, particularly under in vivo conditions.
Miriam Blanco‐Ces, Ana de‐Castro‐Ríos, María Cobo‐Golpe, Ángela López‐Rabuñal, Angelines Cruz, Elena Lendoiro   +5 more
wiley   +1 more source

N-Butylpyrrolidinone as a dipolar aprotic solvent for organic synthesis [PDF]

, 2016
Dipolar aprotic solvents such as N-methylpyrrolidinone (or 1-methyl-2-pyrrolidone (NMP)) are under increasing pressure from environmental regulation. NMP is a known reproductive toxin and has been placed on the EU “Substances of Very High Concern” list ...
Farmer, Thomas James, Hunt, Andrew John, Moonen, Kristof, Parker, Helen Louise, Sherwood, James Richard   +4 more
core   +1 more source

Enhanced Photocatalytic Antibiotic Micropollutants Removal Resulting From a Synergism Between Cu Single Atoms and Carbon Vacancies on Graphitic Carbon Nitride

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Scheme of the synergistic degradation for antibiotic micropollutants in the Cu/ag‐C3N4 system. Photocatalytic processes driven by visible‐light irradiation offer a sustainable means of micropollutants removal from aquatic environments without the addition of reagents.
Xiaozhe Song, Cong Yan, Qinghua Yan, Congzhe Ren, Xin Liu, Ruiyan Zhang, Lei Chen, Chongqing Xu, Zhouyang Long, Wenyu Wang, Mingming Song, Xiaoguo Shi, Hui Wang   +12 more
wiley   +1 more source

The Synthesis and Biological Activity of 1-Alkyl-4-(3-azacyclobenzoyl)-5-hydroxypyrazole Herbicides

CHIMIA, 2003
The benzoylpyrazoles belong to a class of herbicides that inhibit the enzyme 4-hydroxy-phenylpyruvate dioxygenase (HPPD). This mode of action is characterized by bleaching due to the disruption of plastoquinone and ?-tocopherol biosynthesis ...
Zoltan Benko, Sharon Shinkle, John Van Heertum, Johnny Jackson, Jeffery McQuiston, Jeffery Webster, James Turner, Monte Weimer, Eileen Paterson   +8 more
doaj   +1 more source

A nongenomic mechanism for progesterone-mediated immunosuppression: Inhibition of K+ channels, Ca2+ signaling, and gene expression in T lymphocytes [PDF]

, 1998
The mechanism by which progesterone causes localized suppression of the immune response during pregnancy has remained elusive. Using human T lymphocytes and T cell lines, we show that progesterone, at concentrations found in the placenta, rapidly and ...
Beer, Bergeron, Bertrand, Bielefeldt, Blackmore, Breit, Cahalan, Cahalan, Chandy, Clemens, Crabtree, Dolmetsch, Fiering, Foresta, Gouy, Grissmer, Grynkiewicz, Gurka, Hamill, Hess, Horn, Hunt, Karttunen, Kerschbaum, Koo, Lewis, Lewis, Lin, Logsdon, Mason, Michne, Monterroso, Negulescu, Nguyen, Pavia, Pepe, Phipps, Premack, Price, Revelli, Roussev, Runnebaum, Runnebaum, Shastri, Siiteri, Siiteri, Stites, Thastrup, Timmerman, Valera, Van Voorhis, Verheugen, Waldegger, Wu, Zweifach   +54 more
core   +2 more sources