Natalie C. Johnson

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Canine parvovirus (CPV) and its relative feline panleukopenia virus (FPV) bind the transferrin receptor type 1 (TfR) to infect their host cells but show differences in the interactions with the feline and canine TfRs that determine viral host range and tissue tropism. We changed apical and protease-like domain residues by introducing point mutations and(More)
BACKGROUND The "sutureless" repair technique has improved outcomes for post-repair pulmonary vein (PV) stenosis. The purpose of this study is to determine the early outcomes of primary sutureless repair of pulmonary venoocclusive disease in infants with congenital PV stenosis-hypoplasia or PVs at high risk for progressive stenosis. METHODS This is a(More)
Low birth weight (LBW) is a risk factor for mortality in neonatal and infant heart surgery. The purpose of this study was to determine the contemporary outcomes and risk factors of cardiac surgery in low weight babies. The records of 75 consecutive infants weighing <2.5 kg having heart surgery were reviewed. The median weight was 2100 g (range 800-2500 g)(More)
The projected increase in the use of compact fluorescent lamps (CFLs) motivates the development of methods to manage consumer exposure to mercury and its environmental release at the end of lamp life. This work characterizes the time-resolved release of mercury vapor from broken CFLs and from underlying substrates after removal of glass fragments to(More)
Compact fluorescent lamps contain small quantities of mercury, release of which can lead to human exposures of potential concern in special cases involving multiple lamps, confined spaces, or young children. The exposure scenarios typically involve solid lamp debris that slowly releases elemental mercury vapor to indoor spaces. Here we propose and(More)
BACKGROUND The purpose of this study is to determine the outcome and performance of bovine pericardial valves in the pulmonary position. METHODS This is a retrospective review of all patients with congenital heart disease who had pulmonary valve replacement using a bovine pericardial valve from 2002 to 2009 at a single institution. RESULTS There were 73(More)
BACKGROUND A modification of the Fontan operation was recently applied, which includes anastomoses of the extracardiac conduit to the right pulmonary artery and inferior vena cava using simple clamping with no additional circulatory support, venous shunting, pulmonary artery preparation, or prior maintenance of azygos vein patency. The objective of this(More)
The XG blood group system is best known for its contributions to the fields of genetics and chromosome mapping. This system comprises two antigens, Xg(a) and CD99, that are not antithetical but that demonstrate a unique phenotypic relationship. XG is located on the tip of the short arm of the X chromosome with exons 1 to 3 present in the pseudoautosomal(More)
The tomographic inversion of the virtual-source data obtained by processing five days of passive seismic data recorded over the Valhall oil field in Norway demonstrates that reliable information can be obtained on subsurface velocity from passive data. Given the well-established effect of CO2 in decreasing seismic velocities, our results show that(More)