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Articles in 'Chemistry' (Page 65)
Method safely deposits novel metal oxide thin films on substrates
— 17 Sep 2007 15:23University at Buffalo chemists have developed a novel way to grow chemically pure, zinc oxide thin films characterised by dense, bristle-like nanostructures and a new method for depositing them on temperature-sensitive substrates, including polymers, plastics and tapes. The research, published online last month in the Journal of Physical Chemistry, may make possible the deposition of versatile zinc oxide films onto flexible surfaces, enabling the development of more efficient solar cells, liquid-crystal displays, chemical sensors and optoelectronic devices…
New mechanism discovered for DNA recombination and repair
— 12 Sep 2007 14:08A biochemistry research team led by Dr Andrew H.-J. Wang and Dr Ting-Fang Wang at the Institute of Biological Chemistry, Academia Sinica (IBCAS), has discovered that the RecA family recombinases function as a new type of rotary motor proteins to repair DNA damages…
MIT works toward safer gene therapy
— 7 Sep 2007 17:12In work that could lead to safe and effective techniques for gene therapy, MIT researchers have found a way to fine-tune the ability of biodegradable polymers to deliver genes. Gene therapy, which involves inserting new genes into patients' cells to fight diseases like cancer, holds great promise but has yet to realise its full potential, in part because of safety concerns over the conventional technique of using viruses to carry the genes…
Explosive crystal
— 24 Aug 2007 19:04300 years after its discovery, the crystal structure and molecular structure of mercury fulminate are determined. Known to the alchemists and long used as a detonator to set off dynamite - mercury fulminate has a checkered past. Now, more than 300 years after the discovery of this explosive compound, German researchers have been able to characterise its crystal structure and thus finally reveal the molecular structure of mercury fulminate…
Nanotube formation: researchers learn to control the dimensions of metal oxide nanotubes
— 24 Aug 2007 11:57Moving beyond carbon nanotubes, researchers are developing insights into a remarkable class of tubular nanomaterials that can be produced in water with a high degree of control over their diameter and length. Based on metal oxides in combination with silicon and germanium, such single-walled inorganic nanotubes could be useful in a range of nanotechnology applications that require precise control over nanotube dimensions…
Folate mystery finally solved
— 23 Aug 2007 11:35Some biochemical processes, especially those in bacteria, have been so well studied it's assumed that no discoveries are left to be made. Not so, it turns out, for Johns Hopkins researchers who have stumbled on the identity of an enzyme that had been a mystery for more than 30 years. 'It was really quite a surprise when we realised we had discovered the unknown player in how bacteria make the B vitamin folate, a player that we've known of since 1974,' says study author L. Mario Amzel, PhD, professor and director of biophysics and biophysical chemistry at Hopkins. 'Basic research can be so serendipitous at times.'…
Scientists shed light on molecules in living cells
— 21 Aug 2007 22:37Clemson University chemists have developed a method to dramatically improve the longevity of fluorescent nanoparticles that may someday help researchers track the motion of a single molecule as it travels through a living cell. The chemists are exploiting a process called 'resonance energy transfer,' which occurs when fluorescent dye molecules are added to the nanoparticles. Their findings will be reported at the 234th annual national American Chemical Society meeting 19-24 August in Boston…
Scientists retrace evolution with first atomic structure of an ancient protein
— 17 Aug 2007 07:44Scientists have determined for the first time the atomic structure of an ancient protein, revealing in unprecedented detail how genes evolved their functions. Never before have we seen so clearly, so far back in time, said project leader Joe Thornton, an evolutionary biologist at the University of Oregon. We were able to see the precise mechanisms by which evolution molded a tiny molecular machine at the atomic level, and to reconstruct the order of events by which history unfolded…
Findings a step toward making new optical materials
Scientists reproduce the rose's 'petal effect'