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| Article 1 to 10 out of 73 concerning Angewandte Chemie
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New ways to use biomass
(25 Sep 2008)
Tungsten carbide as catalyst for cost-effective conversion of cellulose into industrially useful carbon compounds
Alternatives to fossil fuels and natural gas as carbon sources and fuel are in demand. Biomass could play a more significant part in the future. Researchers in the USA and China have now developed a new catalyst that directly converts cellulose, the ...
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Power from formic acid
(09 May 2008)
Room temperature is warm enough: hydrogen for fuel cells from formic acid
One of the central challenges of our time is the supply of enough environmentally friendly and resource-efficient energy to our society. In this context, hydrogen technology has taken on increased importance. Björn Loges, Albert Boddien, Henrik ...
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Nano Dandelions
(05 Sep 2007)
Bundles of cysteine-lead nanowires spread into highly oriented structures
Under an electron microscope they look like dandelions. In the journal Angewandte Chemie, Xiao-Fang Shen and Xiu-Ping Yan explain their nanoscopic bouquets: They consist of spread-out bundles of nanowires made of lead and the amino acid l-cysteine. ...
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Natural Insecticide Re-Created in the Lab
(24 Aug 2007)
Success after 22 years of research: synthesis of azadirachtin
Twenty-two years of dedicated research has finally resulted in success: In the journal Angewandte Chemie, a British team headed by Steven V. Ley at the University of Cambridge reports the first synthesis of azadirachtin, a natural compound that ...
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Nanoreactors for Reaction Cascades
(21 Aug 2007)
Nanoscopic bubbles with plastic membrane and built-in enzymes for multistep one-pot reactions
Living cells are highly complex synthetic machines: Numerous multistep reactions run simultaneously side by side and with unbelievable efficiency and specificity. For these mainly enzymatic reactions to work so well collectively, nature makes use of ...
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From Microscopy to Nanoscopy
(14 Aug 2007)
Photoswitchable rhodamine amides for high-resolution optical 3D far-field microscopy
Layer-by-layer light microscopic nanoscale images of cells and without having to prepare thin sections? A team led by Stefan Hell and Mariano Bossi at the Max Planck Intstitute for Biophysical Chemistry in Göttingen is now leading the way with a ...
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Molecule with a Split Personality
(02 Aug 2007)
Porphyrinoid switches back and forth between Hückel and Möbius topologies
If you take a strip of paper, twist one end by 180° and then stick the two ends together to form a ring, the result is called a Möbius strip, a geometric shape with only one surface and one edge. You can prove this by making a line along the strip ...
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Switchable Adhesive
(26 Jul 2007)
Gel- and polymer-coated surfaces stick together and separate in response to an environmental stimulus
Two surfaces stick together, separate, and stick together again - on command. This discovery by a team of researchers from the Universities of Sheffield (UK) and Bayreuth contradicts our day-to-day experience. In the animal kingdom, geckos can climb ...
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Coming Soon: Protein Synthesis Without Amino Acids?
(23 Jul 2007)
Polypeptide synthesis done differently: cobalt-catalyzed copolymerization of imines and CO
Usually, the synthesis of short protein chains (polypeptides) begins with the production of their components, the amino acids. But it can be done differently: In the journal Angewandte Chemie, Chinese researchers report a considerably more ...
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Nano Wagon Wheels
(11 Jul 2007)
Synthesize molecule shaped like a wagon wheel
It looks like a tiny wagon wheel: Scanning tunneling microscope images published in the journal "Angewandte Chemie" depict giant molecules with a diameter of 7 nm, whose "hub", "spokes", and "rim" are clearly recognizable. This unusual, highly ...
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