In response to teachers’ requests, the new Next Generation Science Standards that promote engineering design, and as part of Xraise’s growing mobile science program, the Xraise team developed and launched a prototype traveling Tinker Cart during the spring of 2016. The Cart holds supplies for one class of elementary school students to participate in the science and engineering activities.
Feifei Li1, Erik Farquhar2, and co-workers published, “Cobalt Kβ Valence-to-Core X-ray Emission Spectroscopy: A Study of Low-Spin Octahedral Cobalt(III) Complexes” in Dalton Transactions 45, 14191-14202 (2016).
Congressman Tonko represents New York’s 20th Congressional District, and as a member of the Science, Space and Technology Committee, Paul serves on the Subcommittee on Research and Technology, which has jurisdiction over non-defense federal scientific research and development. This alignment, and Tonko’s work toward STEM Education, and engineering education in schools makes him a perfect guest for the Cornell High Energy Synchrotron Source, a National Science Foundation funded laboratory.
However, typical thermal annealing is slow, and polymers may degrade at high annealing temperature. Recently a group at Cornell University devised a scheme for ultrafast heating of polymer films using laser spike annealing . Alan Jacobs from Mike Thompson’s group and Clemens Liedel from Chris Ober’s group, both at the Department of Materials Science and Engineering, brought samples to CHESS D1 station for a detailed analysis of laser annealed traces.
The materials would include donated recyclables already available at the reinvention station at the Sciencenter as well as materials provided by Xraise, including hobby motors, batteries, LED's, electrical tape and other miscellaneous items. Guests would be free to play and build whatever they would like, with the activity being open-ended and entirely creative. In order for such an initiative to be successful, staff at both organizations would need to rely on the oversight of a dedicated set of volunteers.
Engineering next-generation semiconductor devices with the help of grazing incidence reciprocal space mapping at G2
Because of the self-limiting reactions, atomic layer deposition (ALD) offers high conformality which is greatly desired as the critical features in these nanostructures are approaching atomic dimensions. The structural characterization of these nanoscale structures and thin films require use of synchrotron sources such as CHESS which could provide orders of magnitude higher brilliance leading to faster, high-quality diffraction experiments usually not available at a laboratory setup.
For the past year, Louisa has been working with X-ray fluorescence to scan manuscripts from the Johnson Museum, mining deposits from deep below earth, and other samples to train users on the benefits of using the high energy x-rays at CHESS to peer inside, or through their samples.
Turns out that shipping heavy equipment back and forth to schools (even all the way to California) throughout the academic year results in a lot of broken items. We often don’t have enough time between shipments to completely fix all of the equipment, so we use spares and place the broken items in a pile until there is a long enough period of time to fix them. Yes, you guessed it, we wait for the summer break.
Long-range electron transfer in the cytochrome c peroxidase and cytochrome c complex requires stringent conditions
Firstly, hydrogen peroxide reacts with Fe(III) heme of CcP to form an Fe(IV) iron oxo species [Fe(IV)=O], and oxidizes its nearby tryptophan 191 (W191) to a radical cation (W•⁺). Secondly, the presence of W•⁺ facilitates the transfer of electrons from Cc proteins when Cc Fe(II) is oxidized, causing the reduction of CcP W•⁺ to W191. The CcP Fe(IV)=O then re-oxidizes W191 back to its radical cation state, resulting in the eventual formation of Fe(III) and water.