Results 21 to 30 of about 2,914 (196)

Copper- and Silver-Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five- and Six-Membered Heterocycles. [PDF]

open access: yesChemistry
This review summarizes recent advances in copper‐ and silver‐catalyzed reactions of active methylene isocyanides for the synthesis of highly substituted five‐ and six‐membered heterocycles. Emphasis is placed on [3+n] cycloadditions, annulations, and asymmetric strategies, highlighting current limitations and future opportunities in heterocycle ...
George J, Oh K.
europepmc   +2 more sources

Effects of selenium biofortification on crop nutritional quality [PDF]

open access: yes, 2015
Selenium (Se) at very low doses has crucial functions in humans and animals. Since plants represent the main dietary source of this element, Se-containing crops may be used as a means to deliver Se to consumers (biofortification). Several strategies have
Dall'Acqua, Stefano   +3 more
core   +1 more source

Further studies on the iodine concentration of conventional, organic and UHT semi-skimmed milk at retail in the UK [PDF]

open access: yes, 2017
Milk is the largest source of iodine in UK diets and earlier studies showed organic summer and winter milk to be significantly lower in iodine than conventional milk. One study also showed UHT milk to have lower iodine concentration.
Andersson   +23 more
core   +2 more sources

Theory of Chiral Order in Random Copolymers

open access: yes, 1995
Recent experiments have found that polyisocyanates composed of a mixture of opposite enantiomers follow a chiral ``majority rule:'' the chiral order of the copolymer, measured by optical activity, is dominated by whichever enantiomer is in the majority ...
A. L. Kholodenko   +25 more
core   +2 more sources

Synthesis of N-Fmoc-ProtectedAmino Alkyl Thiocyanates/Selenocyanates and their Applicationin the Preparation of 5-Substituted S/Se-Linked Tetrazoles [PDF]

open access: yes, 2011
A novel class of N-Fmoc-protected amino alkyl thiocy- anates/selenocyanates has been prepared by thiocyanation/seleno-cyanation of the corresponding alkyl iodides. These thiocyanates/selenocyanates undergo a facile [2+3]-cycloaddition reaction
Basavalingappa, P. Vasantha   +2 more
core   +1 more source

Transcriptomic analyses of nitrogen assimilation processes in a Chinese strain of Aureococcus anophagefferens

open access: yesGenomics Data, 2015
Aureococcus anophagefferens is a harmful alga that dominates plankton communities during brown tides in North America, Africa, and Asia. In order to figure out the processes of nitrogen assimilation in a Chinese strain of A.
Li-Na Chen   +6 more
doaj   +1 more source

Characterising Particulate Organic Nitrogen at A Savannah-Grassland Region in South Africa

open access: yesAtmosphere, 2019
Although atmospheric organic N compounds are considered to be important, especially in new particle formation and their contribution to brown carbon, these species are not that well understood.
Wanda Booyens   +9 more
doaj   +1 more source

New‐Era Polymer Thermoelectrics: Material Innovations, Doping Frontiers, Decoupling Strategies, and Unconventional Applications

open access: yesAdvanced Materials, EarlyView.
The field of polymer thermoelectrics is entering a new era, featuring breakthroughs in addressing the conventional performance disparity between p‐type and n‐type polymers, pioneering doping frontiers, and sophisticated decoupling strategies. This review explores innovations in molecular design and superior stabilities, bridging the gap from ...
Suhao Wang
wiley   +1 more source

Synthesis of Cyanate Esters Based on Mono-O-Methylated Bisphenols with Sulfur-Containing Bridges

open access: yesMolecules, 2019
We described a synthetic approach to bisphenol-based monocyanate esters based on mono-O-methylation of parental bisphenols followed by cyanation of the residual phenolic hydroxyl. Structures of the synthesized compounds were determined by the application
Andrey Galukhin, Roman Nosov
doaj   +1 more source

Synthesis of a new class of highly fluorinated aliphatic diisocyanates [PDF]

open access: yes, 1971
Synthesis is basis for preparation of polyurethanes that are compatible with liquid oxygen.
Warner, D. A.
core   +1 more source

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