Results 1 to 10 of about 10,309 (214)

Chemistry of Visual Processes [PDF]

open access: yesNature, 1948
IN a recent article under the above title in Nature, Ball, Collins, Morton and Stubbs1 discuss the relation between ‘action spectra' and ‘absorption spectra' of photosensitive pigments in the retina. They show that the ‘action spectra' must—purely on account of the physical laws of light absorption—be broader when the optical density of the layer of ...
S. BALL   +3 more
openaire   +4 more sources

Bayesian Optimization-Assisted Screening to Identify Improved Reaction Conditions for Spiro-Dithiolane Synthesis

open access: yesMolecules, 2023
Bayesian optimization (BO)-assisted screening was applied to identify improved reaction conditions toward a hundred-gram scale-up synthesis of 2,3,7,8-tetrathiaspiro[4.4]nonane (1), a key synthetic intermediate of 2,2-bis(mercaptomethyl)propane-1,3 ...
Masaru Kondo   +8 more
doaj   +1 more source

Recent Applications of Pd-Catalyzed Suzuki–Miyaura and Buchwald–Hartwig Couplings in Pharmaceutical Process Chemistry

open access: yesOrganics, 2022
Cross-coupling reactions have changed the way complex molecules are synthesized. In particular, Suzuki–Miyaura and Buchwald–Hartwig amination reactions have given opportunities to elegantly make pharmaceutical ingredients.
Balaram S. Takale   +2 more
doaj   +1 more source

Cefonicid Benzathine Salt: A Convenient, Lean, and High-Performance Protocol to Make an Old Cephalosporin Shine

open access: yesAntibiotics, 2022
Cefonicid is a second-generation cephalosporin sold under the brand name Sintocef™. It is an injectable drug obtained via a freeze-drying process and is also available for oral preparations.
Marziale Comito   +4 more
doaj   +1 more source

Organo-photocatalytic Synthesis of Functionalized Pyrroles from 2H-Azirines and α-Substituted Nitroalkenes

open access: yesSynOpen, 2022
An efficient organo-photocatalytic method for the synthesis of tetrasubstituted pyrroles bearing a ketone, ester, alcohol, or nitro group at the 3-position has been developed.
Lalita Devi   +3 more
doaj   +1 more source

A comprehensive review of flow chemistry techniques tailored to the flavours and fragrances industries

open access: yesBeilstein Journal of Organic Chemistry, 2021
Due to their intrinsic physical properties, which includes being able to perform as volatile liquids at room and biological temperatures, fragrance ingredients/intermediates make ideal candidates for continuous-flow manufacturing.
Guido Gambacorta   +2 more
doaj   +1 more source

Facile preparation of tetra‐polyethylene glycol hydrogel microspheres for drug delivery by cross‐flow membrane emulsification

open access: yesEngineering Reports, 2021
The purpose of this work was to develop technology for facile, large‐scale production of tetra‐polyethylene glycol (PEG) hydrogel amino‐microspheres to serve as intermediates for injectable microsphere‐drug conjugates produced under cGMP guidelines. Here
Jeff Henise   +3 more
doaj   +1 more source

The Influence of pH on the Combustion Properties of Bio-Coal Following Hydrothermal Treatment of Swine Manure

open access: yesEnergies, 2020
The application of excessive amounts of manure to soil prompted interest in using alternative approaches for treating slurry. One promising technology is hydrothermal carbonisation (HTC) which can recover nutrients such as phosphorus and nitrogen while ...
Aidan Mark Smith   +2 more
doaj   +1 more source

Screening methods for enzyme-mediated alcohol oxidation

open access: yesScientific Reports, 2022
Alcohol oxidation for the generation of carbonyl groups, is an essential reaction for the preparation of fine chemicals. Although a number of chemical procedures have been reported, biocatalysis is a promising alternative for more sustainable and ...
Martina L. Contente   +6 more
doaj   +1 more source

Corrosion of Heat Transfer Materials by Potassium-Contaminated Ilmenite Bed Particles in Chemical-Looping Combustion of Biomass

open access: yesEnergies, 2022
This study discusses the potential corrosion of boiler materials in chemical-looping combustion (CLC) of biomass. The CLC of biomass has the potential to negative CO2 emission in heat and power production.
Jan-Erik Eriksson   +4 more
doaj   +1 more source

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