The compound, kanglemycin A, is related to the antibiotic rifampicin, according to Katsuhiko Murakami, professor of biochemistry and molecular biology at Penn State and one of leaders of the project. “Rifampicin is already part of the cocktail of antibiotics used to treat tuberculosis, but many strains of the tuberculosis-causing bacteria have developed resistance to it,” Murakami said.
In early 2019, CHESS-U will have an increased energy of the electron beam, from 5.3 to 6.0 GeV, double the current from 100 to 200 mA, and reduction of the horizontal emittance of the x-ray beam from 100nm to 30nm.
What did the Scientists Discover?
It is a well known fact that crystals reflect X-rays when the incident X-ray beam makes a certain angle to a given set of atomic planes. In other words, this happens when the Bragg diffraction condition, which relates the incident angle, radiation wavelength and the interatomic spacing of the planes is satisfied. A not so trivial question to answer is what fraction of incident radiation is reflected for any given Bragg reflection and why.
Career and Technical Education (CTE) programs are on the forefront of education reform across the region and nation, offering certification in a broad scope of paths in skilled trades such as construction, manufacturing, machining, and engineering.
What did the Scientists Discover?
Although singlet fission promises to boost device efficiencies, it is a complex process involving multiple steps. A loss incurred during any step would be detrimental to promised efficiency gains. Currently, few highly efficient singlet fission materials exist—a grand challenge is to develop structural rules that help guide the design and synthesis of new materials.
Before this is all possible, additively manufactured parts must be created with microstructures and compositions comparable to their traditionally manufactured counterparts in order to ensure the same required performance and safety integrity. One of the most-pressing problems that arises in the additive manufacturing process is the development of residual stresses. These stresses that develop during rapid cooling essentially ‘spring-load’ a part before it is placed in service and can lead to premature failure.
Grace King, a rising Junior, majoring in Physics at Vassar College and studying Engineering at Dartmouth College, participated in the REU program at Cornell this summer, and her research project is quite timely, as CHESS and CESR are currently undergoing their biggest upgrade in decades.
However, the pervasive presence of granular materials masks how complicated it is to predict their mechanical response. Granular materials can behave as a solid foundation to a building, a flowing liquid down an incline, or as a gas when lifted into a storm. All these behaviors stem from how the contacts between grains evolve as load is applied.