منابع مشابه
Electron correlation effects on the femtosecond dephasing dynamics of E22 excitons in (6,5) carbon nanotubes.
Highly nonlinear pump fluence dependence was observed in the ultrafast one-color pump-probe responses excited by 38 fs pulses resonant with the E(22) transition in a room-temperature solution of (6,5) carbon nanotubes. The differential probe transmission (ΔT/T) at the peak of the pump-probe response (τ = 20 fs) was measured for pump fluences from ∼10(13) to 10(17) photons/pulse cm(2). The onset...
متن کاملControl of bacterial virulence by the RalR regulator of the rabbit-specific enteropathogenic Escherichia coli strain E22.
Atypical enteropathogenic Escherichia coli (aEPEC) causes endemic diarrhea, diarrheal outbreaks, and persistent diarrhea in humans, but the mechanism by which aEPEC causes disease is incompletely understood. Virulence regulators and their associated regulons, which often include adhesins, play key roles in the expression of virulence factors in enteric pathogenic bacteria. In this study we iden...
متن کاملExciton-exciton annihilation and relaxation pathways in semiconducting carbon nanotubes.
We present a thorough analysis of one- and two-color transient absorption measurements performed on single- and double-walled semiconducting carbon nanotubes. By combining the currently existing models describing exciton-exciton annihilation-the coherent and the diffusion-limited ones-we are able to simultaneously reproduce excitation kinetics following both E11 and E22 pump conditions. Our sim...
متن کاملAbnormal Anti-stokes Raman Spectra of Single Walled Carbon Nanotubes Raised from Coherent Anti-stokes Raman Scattering and Optical Cooling Processes
For the single-walled carbon nanotubes, the higher values of anti-Stokes/Stokes Raman intensity ratio (Ias/Is) then the predictions of the Maxwell-Bolzmann formula indicates a CARS emission resulting from a wave mixing process between the incident laser light (ωl) and Stokes Raman light (ωs) generated by a SERS mechanism . The weaker value of (Ias/Is) observed at resonant excitation of semicond...
متن کاملTiming of appearance of late oligodendrocyte progenitors coincides with enhanced susceptibility of preterm rabbit cerebral white matter to hypoxia-ischemia.
Emerging evidence supports that premature infants are susceptible to both cerebral white and gray matter injury. In a fetal rabbit model of placental insufficiency, preterm rabbits at embryonic day 22 (E22) exhibited histologic evidence of gray matter injury but minimal white matter injury after global hypoxia-ischemia (H-I). We hypothesized that the dissociation between susceptibility to gray ...
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ژورنال
عنوان ژورنال: Arthropod Management Tests
سال: 2012
ISSN: 2155-9856
DOI: 10.4182/amt.2012.e22