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Qy-excited resonance Raman spectra of the accessory bacteriochlorophylls (B), the bacteriopheophytins (H), and the primary electron donor (P) in the bacterial photosynthetic reaction center (RC) of Rhodobacter sphaeroides have been obtained at 95 and 278 K. Frequency and intensity differences are observed in the low-frequency region of the P vibrational(More)
The electronic absorption line shape and Stark spectrum of the lowest energy Q(y)() transition of the special pair in bacterial reaction centers contain a wealth of information on mixing with charge transfer states and electronic asymmetry. Both vary greatly in mutants that perturb the chemical composition of the special pair, such as the heterodimer(More)
[1] Climate-change-induced alterations to coral reef ecosystems, in combination with sea level rise, have the potential to significantly alter wave dissipation across reefs, leading to shifts in alongshore sediment transport gradients and alterations to tropical coastlines. We used Delft3D to model schematized profiles of two reef flat widths based on the(More)
The analysis of inorganic atomic species is greatly facilitated by the coupling of lasers with mass spectrometers. A tunable dye laser, alone or in combination with a pump laser, ionizes atoms by resonant excitation processes; the ions are then analyzed in the mass spectrometer. The laser-mass spectrometer system promises to overcome traditional limits of(More)
Absolute values have been obtained for the isotopic abundance ratios of a reference sample of strontium using solid sample thermal ionization mass spectrometry. Samples of independenly known isotopic composition prepared from chemically pure and nearly isotopically pure separated strontium isotopes were used to calibrate the .mas spectrometry.
The role of media in collective action repertoires has been extensively studied, but media as an agent of socialization in social movement identity is less understood. It could be that social movement media is normalizing a particular activist identity to the exclusion of other demographics. For instance, Harper has identified white-centrism in(More)
Humans are drawn to bees. Unlike most familiar, flying insects such as mosquitoes or houseflies — those pests we impulsively dodge or swat — bees are likely to give us pause. Their appearance, buzz, wax, honey, and the collective productivity of the colony itself, generates reverence and awe, even with the threat of a sting. It is not surprising that poets(More)
This essay looks to the omission of aging queer bodies from new medical technologies of sex. We extend the Foucauldian space of the clinic to the mediascape, a space not only of representations but where the imagination is conditioned and different worlds dreamed into being. We specifically examine the relationship between aging queers and the marketing of(More)