Catherine Morgan

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The rotational diffusion behavior of phosphorus metabolites present in calf lens cortical and nuclear homogenates was investigated by the NMR technique of 31P off-resonance rotating frame spin-lattice relaxation as a means of assessing the occurrence and extent of phosphorus metabolite-lens protein interactions. 31P NMR spectra of calf lens homogenates were(More)
The 13C off-resonance rotating frame spin-lattice relaxation technique is applicable to the study of protein rotational diffusion behavior in a variety of experimental situations. The original formalism of James and co-workers (1978) (J. Amer. Chem. Soc. 100, 3590-3594) was constrained by the assumption of random isotropic reorientational motion. Here we(More)
Proton pulsed gradient spin echo (PGSE) nuclear magnetic resonance (NMR) spectroscopy was used to explore the free and restricted non-Brownian nature of lens water self-diffusion in calf lens tissue. At all temperatures investigated the water self-diffusion coefficient (Dw) of the cortical homogenate (25% protein) was 1.6-1.7 times greater than that for the(More)
The motional dynamics of lens cytoplasmic proteins present in calf lens homogenates were investigated by two 13C nuclear magnetic resonance (NMR) techniques sensitive to molecular motion to further define the organizational differences between the cortex and nucleus. For the study of intermediate (mobile) protein rotational reorientation motion time scales(More)
Nickel(0)-catalyzed cross-coupling of heteroaryl-containing diarylmethanes with both aryl bromides and chlorides has been achieved. The success of this reaction relies on the introduction of a unique nickel/NIXANTPHOS-based catalyst system, which provides a direct route to triarylmethanes from heteroaryl-containing diarylmethanes. Reactivity studies(More)
Enhancements of 1H nuclear magnetic transverse relaxation rates by Mn(II)- and Gd(III)-ethylenediaminetetraacetic acid (EDTA)-human serum albumin (HSA) complexes are compared with MnCl2 in human plasma and isotonic saline. HSA-EDTA-Mn and HSA-EDTA-Gd in saline, at physiological concentrations of HSA, afforded T2's comparable to 2 mM MnCl2 in 4% HSA saline.(More)
Social inhibition of return (S-IOR) refers to the finding that reaction times (RTs) are longer for movements to the same location as a partner's previous response. Wilson and Pratt (2007) found that when people acting alone freely chose their responses, they were less likely to choose a response that was spatially-compatible with a recently presented(More)
The 13C off-resonance rotating frame spin-lattice relaxation technique is applicable to the study of protein rotational diffusion behavior in both model in vitro and in vivo systems. The original formalism of James and co-workers [(1978) J. Am. Chem. Soc. 100, 3590-3594] was constrained by the assumption of random isotropic reorientational motion of a(More)
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