Results 11 to 20 of about 2,190,641 (322)

Recent Advances in the Synthesis of Cyclic Sulfoximines via C–H Bond Activation

open access: yesMolecules, 2023
Sulfoximines, a ubiquitous class of structural motifs, are widely present in bioactive molecules and functional materials that have received considerable attention from modern organic chemistry, pharmaceutical industries, and materials science ...
Bingren Wang, Xiayu Liang, Qingle Zeng
doaj   +1 more source

Recent Advances in Asymmetric Synthesis of Pyrrolidine-Based Organocatalysts and Their Application: A 15-Year Update

open access: yesMolecules, 2023
In 1971, chemists from Hoffmann-La Roche and Schering AG independently discovered a new asymmetric intramolecular aldol reaction catalyzed by the natural amino acid proline, a transformation now known as the Hajos–Parrish–Eder–Sauer–Wiechert reaction ...
Arianna Quintavalla   +2 more
doaj   +1 more source

An Overview of the Production of Magnetic Core-Shell Nanoparticles and Their Biomedical Applications

open access: yesMetals, 2022
Several developments have recently emerged for core-shell magnetic nanomaterials, indicating that they are suitable materials for biomedical applications.
Dimitris Tsamos   +3 more
doaj   +1 more source

Rational Synthesis and Regulation of Hollow Structural Materials for Electrocatalytic Nitrogen Reduction Reaction

open access: yesAdvanced Science, 2022
The electrocatalytic nitrogen reduction reaction (NRR) is known as a promising mean of nitrogen fixation to mitigate the energy crisis and facilitate fertilizer production under mild circumstances.
Cong Xue   +9 more
doaj   +1 more source

Bicyclic 1,3a,6a-Triazapentalene Chromophores: Synthesis, Spectroscopy and Their Use as Fluorescent Sensors and Probes

open access: yesChemosensors, 2021
The 1,3a,6a-triazapentalene (TAP) is an aromatic heterocyclic fluorescent dye with interesting features such as its small size, large Stokes shift, solvatochromism, and emission wavelengths that are spread across the visible spectrum.
Yingchun Wang, Tomas Opsomer, Wim Dehaen
doaj   +1 more source

Bayesian off-line detection of multiple change-points corrupted by multiplicative noise : application to SAR image edge detection [PDF]

open access: yes, 2003
This paper addresses the problem of Bayesian off-line change-point detection in synthetic aperture radar images. The minimum mean square error and maximum a posteriori estimators of the changepoint positions are studied.
Andre-Obrecht   +39 more
core   +3 more sources

A New Way to 2,3,4-Trisubstituted Benzo[h]quinolines: Synthesis, Consecutive Reactions and Cellular Activities

open access: yesMolecules, 2023
The reaction of mercaptoacetic acid esters with pentachloro-2-nitro-1,3-butadiene provides the appropriate precursors for the synthesis of 2,3,4-trisubstituted benzo[h]quinolines.
Viktor A. Zapol’skii   +5 more
doaj   +1 more source

A New Stereoselective Approach to the Substitution of Allyl Hydroxy Group in para-Mentha-1,2-diol in the Search for New Antiparkinsonian Agents

open access: yesMolecules, 2023
Two approaches to the synthesis of para-menthene epoxide ((1S,5S,6R)-4) are developed. The first approach includes a reaction between chlorohydrin 7 and NaH in THF. The second involves the formation of epoxide in the reaction of corresponding diacetate 6
Alexandra V. Podturkina   +3 more
doaj   +1 more source

Synthetic Gene Circuits: Design with Directed Evolution [PDF]

open access: yes, 2007
Synthetic circuits offer great promise for generating insights into nature's underlying design principles or forward engineering novel biotechnology applications. However, construction of these circuits is not straightforward.
Arnold, Frances H., Haseltine, Eric L.
core   +1 more source

Diamond Nanowires: A Novel Platform for Electrochemistry and Matrix-Free Mass Spectrometry

open access: yesSensors, 2015
Over the last decades, carbon-based nanostructures have generated a huge interest from both fundamental and technological viewpoints owing to their physicochemical characteristics, markedly different from their corresponding bulk states.
Sabine Szunerits   +2 more
doaj   +1 more source

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