The complete formation of nitrogenase is an essential part in understanding how the complex enzyme works and is essential for further manipulation and research of the structure. The exact formation process has yet to be determined, but it is hypothesized that models, containing gene deletions, derived using X-ray crystallographic analyses of nitrogenase structures, can provide snapshots of the formation process depending upon the deletion.
The research that will be presented in this paper concerns the synthesis and testing of a bimetallic homogenous catalytic system based on a tetraphosphine ligand system. The [Rh2H2(µ -CO)2(rac-et,ph-P4)]2+ homogeneous catalyst system discovered by G. G. Stanley's laboratory can be resolved into pure enantiomers and has been shown to be one of the best asymmetric hydroformylation catalysts for vinyl esters with 85% enantiomeric excess (ee) and 4:1 branched to linear regioselectivity for vinyl acetate (Stanley 2005).
Informal educational centers, such as museums and public aquaria, have looked towards interactivity as one way to make their exhibits more attractive and informative. In some institutions, such as aquaria, direct interaction with most of the specimens is impractical. However, touch-screen information systems may become an effective way to introduce interactive experiences to visitors.
By using principles of the creative design process, a series of low-level prototypes and user studies were created to inform the design of an information visualization technique that deals with the problem of visually representing information quality. Understanding and clearly representing information quality is an important step in overcoming the problems of "information overload", a term used to describe the problem of having stronger data collection than data processing techniques. The hypothesis was that illustrative rendering techniques would be an intuitive and effective means for the display of information quality in multidimensional datasets.
Dark energy, which is believed to be a cosmic energy density that is gravitationally repulsive and does not appear to cluster in galaxies, has been invoked to account for the recent measurement that the rate of the universe's expansion is accelerating. To better understand these phenomena, scientists utilize type Ia supernovae as calibrated candles. Lawrence Berkeley National Laboratory (LBNL) is developing the Supernova Acceleration Probe (SNAP), a space-based telescope that will be used to identify and measure supernovae.