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400-year-old mystery of why early explosive produces purple smoke solved by academics

400-year-old mystery of why early explosive produces purple smoke solved by academics
phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.

Antoine Lavoisier , Robert Hooke , Sebald Schwaertzer , Jan Maurycy Uszko , Simon Hall , Committee On Powder Diffraction Standards , University Of Bristol , Selected Area Electron Diffraction , Joint Committee , Powder Diffraction Standards , Professor Simon Hall , Jan Maurycy , Professor Hall , Explosive Chrysopoeia ,

Making Antibacterial Nanoparticles from Fruit Waste

In a new study, researchers have synthesized silver nanoparticles via a sustainable and environmentally safe method by utilizing fruit waste. ....

Punica Granatum , Development Of Silver Nanoparticles , Materials Today , Antibacterial Nanoparticles , Silver Nanoparticles , Fruit Waste , Transmission Electron Microscopy , Dynamic Light Scattering , Selected Area Electron Diffraction ,

"A script-based method for achieving distortion-free selected area elec" by David R.G. Mitchell

Electron diffraction patterns obtained on a TEM contain elliptical distortion resulting from column defects. This distortion can be corrected by applying offsets to the objective lens stigmators to cancel distortions occurring further down the column. In this work, a DigitalMicrographTM script-based method has been developed to identify the optimum objective stigmator settings which produce a distortion minimum in diffraction. Initially, a manual (by eye) correction is used to determine the stigmator values necessary to bring the pattern distortion below the threshold at which it is no longer visible to the naked eye (<1%). Thereafter, an automated acquisition script is used to acquire matrices of diffraction patterns while varying the stigmator values about the values which were identified as producing a distortion minimum in the preceding step. This analysis can be applied iteratively to refine the location of the distortion minimum, using progressively finer step changes in objec ....

Digitalmicrograph Script , Lliptical Distortion , Selected Area Electron Diffraction ,