منابع مشابه
Hendrikje van Andel, bristlecone pines, and why we die.
At the moment of writing this editorial (September 2004), the oldest living person in the world is Hendrikje van Andel. She celebrated her 114th birthday on June 29 of this year, and lives in an old people’s home in Hoogeveen, the Netherlands. When interviewed by the world press she cheerfully gave away her secret: a herring and a glass of orange juice a day. While survival beyond the age of 10...
متن کاملAlkyne metathesis.
This review discusses the emergence of alkyne metathesis as a valuable synthetic tool applicable in the synthesis of complex molecules and polymer science.
متن کاملCu-catalyzed azide-alkyne cycloaddition.
The Huisgen 1,3-dipolar cycloaddition reaction of organic azides and alkynes has gained considerable attention in recent years due to the introduction in 2001 of Cu(1) catalysis by Tornøe and Meldal, leading to a major improvement in both rate and regioselectivity of the reaction, as realized independently by the Meldal and the Sharpless laboratories. The great success of the Cu(1) catalyzed re...
متن کاملAlkyne-Protected Ruthenium Nanoparticles†
Stable ruthenium nanoparticles protected by 1-octynyl fragments were synthesized by a wet chemical method. Transmission electron microscopic measurements showed that the resulting particles exhibited an average core diameter of 2.55 ( 0.15 nm with well-defined Ru crystalline lattice fringes. Because of the formation of RusCt bonds, the CtC vibrational stretch was found in FTIR measurements to r...
متن کاملDesign of living ring-opening alkyne metathesis.
Despite the tremendous impact of alkene ring-opening metathesis polymerization (ROMP) on the design and the synthesis of polymers and functional materials, examples for the analogous alkyne ROMP remain scarce. This imbalance can be rationalized by the limited availability of commercially available catalysts and the lack of alkyne metathesis monomers. We present here the synthesis and a systemat...
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ژورنال
عنوان ژورنال: Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie
سال: 1991
ISSN: 2222-4173,0254-3486
DOI: 10.4102/satnt.v10i2.490