Results 151 to 160 of about 165,305 (402)
Česká Stomatologie a Praktické Zubní Lékařství, 2009 The objective was to compare efficacy of several types of halogen and LED polymerization lamps in curing restorative composite materials. Halogen lamps Heliolux DLX1 (Ivoclar Vivadent) and Megalux Fast Cure (MegaPhysik) and LED lamps DioPower (CMS Dental)
P. Bradna +3 more
doaj
Epoxidation of flavones by dimethyldioxirane
The Journal of Organic Chemistry, 1991 The synthesis of epoxides 2 by epoxydation of flavones 1 with isolated dimethyldioxirane (as acetone solution) at subambient temperatures is reported. These labile epoxides were isolated and completely characterized by UV, IR, 1 H and 13 C NMR, MS, and C, H analyses.
Adam, W. +3 more
openaire +3 more sources
Synthesis of a Molecular Tweezer Based on Norbornadiene Framework: Unexpected Stereoselectivity
Asian Journal of Organic Chemistry, EarlyView.A new type of Klarner's molecular tweezer was synthesized through annulation of an α‐amino ketone. Surprisingly, the reaction takes place stereoselectivity though the initial amino ketone is racemic. This tweezer comprises two near‐parallel flat aromatic rings as pincers, each bearing two methyl ester groups, and a pyrazine unit as the tether ...
Evren Cücü +3 more
wiley +1 more source
ChemBioChem, Volume 23, Issue 23, December 5, 2022., 2022 Housing sulfur: Certain fungi produce diketopiperazine compounds with a transannular sulfur bridge. These so‐called epipolythiodioxopiperzines are toxic by non‐specifically interacting with intracellular proteins and contribute to fungal pathogenicity. Producer strains serve as bio‐pesticides but also question safety of food fermentation.
Eva M. Huber
wiley +1 more source
Angewandte Chemie, EarlyView.Concise total syntheses of five leuconoxine alkaloids have been achieved using a pyrrole‐centered strategy, which features a newly developed palladium/norbornene‐catalyzed pyrrole double C─H functionalization method, a divergent late‐stage oxidative dearomatization tactic, and no use of protecting groups.
Xin Liu +5 more
wiley +2 more sources
Cross metathesis of unsaturated epoxides for the synthesis of polyfunctional building blocks
Beilstein Journal of Organic Chemistry, 2015 The cross metathesis of 1,2-epoxy-5-hexene (1) with methyl acrylate and acrylonitrile was investigated as an entry to the synthesis of polyfunctional compounds.
Meriem K. Abderrezak +6 more
doaj +1 more source
Ozone adsorption on graphene: ab initio study and experimental validation [PDF]
arXiv, 2009 We have investigated ozone adsorption on graphene using the ab initio density functional theory method. Ozone molecules adsorb on graphene basal plane with binding energy of 0.25 eV, and the physisorbed molecule can chemically react with graphene to form an epoxide group and an oxygen molecule.
arxiv
Advanced NanoBiomed Research, EarlyView.Chemically modified graphene oxide nanocarriers provide a targeted lung cancer gene therapy platform. In a 3D tumor microenvironment model, these nanocarriers deliver therapeutic genes, regulate immune markers, and induce apoptosis in cancer cells. Combined gene delivery enhances cancer cell elimination, demonstrating the potential of this approach for
Francesca Grilli +3 more
wiley +1 more source
Angewandte Chemie, EarlyView.The anti‐ and syn‐selective epoxidation of various α,β‐unsaturated aldehydes is promoted by an engineered variant of 2‐deoxy‐D‐ribose‐5‐phosphate aldolase (DERA), giving rise to various α,β‐epoxy‐aldehydes with excellent enantiopurity (enantiomeric ratio up to 99 : 1). Abstract The enzyme 2‐deoxy‐D‐ribose‐5‐phosphate aldolase (DERA) naturally catalyzes
Hangyu Zhou +5 more
wiley +2 more sources
Oilseeds and fats, crops and lipids, 2016 This review proposes a platform approach for the synthesis of various building blocks from cardanol oil in one or two-steps synthesis. Cardanol is a natural phenol issued from Cashew nutshell liquid (CNSL).
Jaillet Fanny +3 more
doaj +1 more source