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POPSActive Thermitic Material Discovered in Dust from the 9/11 WTC Catastrophe We have discovered distinctive red/gray chips in all the samples we have studied of the dust produced by the destruction of the World Trade Center. The properties of these chips were analyzed using optical microscopy, scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (XEDS), and differential scanning calorimetry (DSC). The red material contains grains approximately 100 nm across which are largely iron oxide, while aluminum is contained in tiny plate-like structures. Numerous iron-rich spheres are clearly observed in the residue following the ignition of these peculiar red/gray chips. The red portion of these chips is found to be an unreacted thermitic material and highly energetic.
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POPSMolecules revealed in all their glory by microscope
Gross revealed to physicsworld.com that there was an element of luck in discovering that carbon monoxide makes for a highly effective AFM tip because they had picked up the CO molecule by accident during routine use of their conventional AFM. The researchers were quick, however, to realize that the observed improvement in resolution made scientific sense because CO has been used in scanning tunnelling microscopy (STM), for many years, to improve resolution for the same reason. Now, this is funny how we can discover things even if we're not trying to. Gross says that he and his team intend to develop their research with the short term goal of improving resolution and building up a catalogue of chemical signatures for a range of different atoms and molecules. Eventually the CO-tipped AFM could be used to determine the identity of unidentified familiar molecules for use in chemical analysis. In the longer term, new forms of AFM such as this could be applied to the study of chemical rea
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POPSVideo of the First 24 Hours of an Embryo's Cells The new technique, called Digital Scanned Laser Light-Sheet Fluorescence Microscopy, could be used on other animals such as mice, chicken and frogs, which would could help researchers better understand evolution at the cellular scale. Already, the research has shown that the initial stages of heart development do not happen as scientists thought.
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POPSSilver nanorod microscopy The proposed device is based on a phenomenon called plasmonic resonance, which refers to the collective excitation of free electrons that occurs when light falls on a metallic surface. As well as amplifying the light waves in the near field, these resonances can be propagated through the metal. However, in the materials developed to date, the energy transmitted decays rapidly as it moves away from the surface.
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POPSDon't Stress! Bacterial Cell's 'Crisis Command Center' Revealed If a bacteria cell finds itself in a dangerous situation - for example, if the temperature or saltiness of the bacteria's environment reach dangerous levels which threaten the survival of the bacteria -a warning signal from the cell's surface is transmitted into the cell. Using cutting edge electron microscopy imaging techniques the authors of the new research observed that the stressosomes receive this warning signal, and in response several proteins called RSBT break away from the large stressosome. This breakaway triggers a cascade of signals within the cell which results in over 150 proteins being produced - proteins which enable the cell to adapt, react and survive in its new environment.
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POPSMicroscope On A Chip Researchers at Caltech, recently developed the revolutionary new type of microscope without lenses. The devices could be mass-produced at a cost of $10 each and incorporated into large arrays, enabling high-throughput imaging in biology labs. The device is also compact enough to be put in a cell phone and it can use just sunlight for illumination. This makes it very appealing for Third-World applications,
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