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Behaviour of CeO2 nanoparticles and bulk and their toxicity in freshwater and seawater microalgae
Free accessBASE | 2016| -
Development of Mo/Au transition edge sensors for cryogenic x-ray detectors
Free accessBASE | 2016| -
Synthesis and characterization 3D Modulated and smooth TiO2 nanotubes for energy applications
Free accessBASE | 2016| -
Agent Adaptation in an Urban Coastal Scenario: Applying the VIABLE Framework
Free accessBASE | 2021| -
Coastal Cities Affected by Sea Level Rise and Forrester’s ‘Urban Dynamics’
Free accessBASE | 2021| -
Growth dynamics of nanocrystalline diamond films grown by hot-filament CVD
Free accessBASE | 2013| -
Electrodeposition of Co-Sb Thick Films and their Thermoelectric Properties in DMSO
Free accessBASE | 2013| -
An examination of QTL architecture underlying pod shattering resistance in common bean
Free accessBASE | 2017| -
A simple sketch and a weight attached to a spring are used by George Jernakoff (left) and Walter Morgan of the General Engineering Laboratory to explain the basic principle employed in a new ""robot chemist."" Like the bobbing weight of the spring, tiny electrically-charged particles of gases or light liquids have a natural frequency. In the new device the tiny particles, called ions, are formed by bombardment of molecules with electrons emitted from a hot filament. Radio frequency voltage ""sorts"" the ions according to their ration of weight to electrical charge, and those having a natural frequency equal to the frequency of the voltage applied are accelerated in a d.c magnetic field to a collector. The electrical signals from the collector make it possible to obtain the ""signature of the sample gas on a chart recorder. Called the Ion Resonance Mass Spectrometer, it opens the door to automatic processing in the gas, petroleum, pharmaceutical and chemical industries. Used in combination with computers and other automatic machines, it makes possible continuous control of the mixture in a stream of multi-components gases or light liquids.
Free accessBASE| -
Simulating atmospheric conditions that prevail as high as the moon is a neat trick, but scientists can do it. Here, Dr. D.G. Flom, chemist at the General Electric Research Laboratory, demonstrates a device that can test the stamina of carbon brushes at altitudes up to the moon. Since many such brushes disintegrate quickly at high altitudes in electric motors used in aircraft, special types must be developed, then tested before flight. Dr. Flom produces rarified atmospheres by evacuating the air from a vacuum jar enclosing the test equipment. To rotate the equipment inside the jar without breaking the seal, the scientist built a magnetic clutch. A powerful GE Alnico magnet at the end of the motor drive shaft turns another magnet inside the vacuum jar. Attached to the inside magnet and part of the jar-enclosed equipment is a copper cylinder (above Flom's hand) that wears away the carbon brush seen touching the cylinder. The inner magnet and attached cylinder can be rotated at speeds up to 1,800 revolutions a minute through the magnetic coupling. The flat, stainless steel plate set in the bell jar between the magnets permits positioning the outer one to within three eights of an inch of the inner magnet. Stainless steel does not interfere with the magnetic coupling.
Free accessBASE| -
Filtration efficiency and breathability of fabric masks and their dependence on fabric characteristics
Free accessBASE | 2023|
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