10,000 publications from this institution
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Jay Keasling, Berkeley Lab's Associate Director for Bioscience and the CEO of DOE's Joint BioEnergy Institute (JBEI), explains how special strains of microbes can convert the biomass of non-food crops and agricultural waste into fuels for cars, trucks and jet planes. Keasling's research team at JBEI has developed E.coli that can digest switchgrass and convert the plant sugars into gasoline, diesel or jet fuel, not unlike the process by which beer is brewed.
We believe that synchronization and chaos are closely related. Common intuition suggests that when a circuit is off synchronization the observed output, although not periodic, will be a sum of periodic (intermodulation) components. In fact, at least for a large class of systems we have studied, the output does not have this relatively simple form but is actually chaotic. This paper studies a simple but realistic model for a large class of triggered oscillators. Theory and experiments both confirm that the output shows the properties of sensitivity to initial conditions, nonperiodicity, broad spectrum, and complicated recurrence, that characterize chaotic motion.
In this letter, we extend chaotic switching to general chaotic parameter modulation. By using adaptive controller, synchronization between transmitter and receiver is maintained and message signal is recovered. Computer simulation results are given.
An analysis is presented of the response of a reversible charge transfer reaction at a solid/electrolyte interface to a damped oscillatory controlled potential. This control function is of the type that results at short times upon imposition of a potential step using a typical potentiostat. We show that the current always overshoots the ideal response and that the period over which the observed current deviates significantly from the ideal behavior depends upon the size of the potential step, the interfacial capacitance, and the characteristics of the potentiostat. In any event, constant potential control is not established until four or five dimensionless times, , have elapsed after imposition of the potential step, where is the exponential decay constant for the oscillations in the imposed control function.
Abstract This review summarizes the contributions of a number of groups working in the rapidly growing area of monolithic columns for capillary electrochromatography (CEC), with a focus on those prepared from synthetic polymers. Monoliths have quickly become a well‐established stationary phase format in the field of CEC. The simplicity of their in situ preparation method as well as the good control over their porous properties and surface chemistries make the monolithic separation media an attractive alternative to capillary columns packed with particulate materials. A wide variety of approaches as well as materials used for the preparation of the monolithic stationary phases are detailed. Their excellent chromatographic performance is demonstrated by numerous separations of different analytes.
