Julia Wallace

Learn More
Vitrification could provide a promising tool for the cryopreservation of fish embryos. However, in order to achieve a vitrifiable medium, a high concentration of permeable cryoprotectants must be employed, and the incorporation of high molecular weight compounds should also be considered. The toxicity of these permeable and non-permeable agents has to be(More)
Models have been developed for analyzing dynamic contrast-enhanced (DCE)-MRI data that do not require measurements of the arterial input function (AIF). In this study, experimental results obtained from a reference region (RR) analysis are compared with results of an AIF analysis in the same set of five animals (four imaged twice, yielding nine data sets),(More)
This review ooers the rst available overview of progress in the eld of quantum computer simulation. As research interest in quantum computation grows, together with the number of eld researchers, it seems certain that quantum computer simulators will play a major role in this research. The review discusses quantum computer simulators and their role in the(More)
Proton (1H) magnetic resonance (MR) spectra of ex vivo biopsy samples of ovarian cancers provided biochemical information that was used to discriminate cancer from normal ovarian tissue. Possible differences present in intrinsically resistant tumors or changes in biochemistry after the induction of resistance were identified. Using multivariate techniques,(More)
Cryopreservation produces several types of damage in spermatozoa, leading to fertility impairment. The reduction arises both from a lower viability post-thaw and from sublethal dysfunctions in some of the surviving cells. In the present study, we have analysed the effect of cryopreservation in 5 ml macrotubes on the quality of post-thawed gilthead sea bream(More)
The arterial input function (AIF) is important for quantitative MR imaging perfusion experiments employing Gd contrast agents. This study compared the accuracy of T(2)*-weighted magnitude and phase imaging for noninvasive measurement of the AIF in the rat aorta. Twenty-eight in vivo experiments were performed involving simultaneous arterial blood sampling(More)
The objective of this paper is to propose a telemedicine transaction model and a set of terms to facilitate communication between telemedicine researchers, program directors, and others. The model is described in terms of the sites, personnel, and events involved. Examples of real-time, store-and-forward, and physical referral transactions are depicted(More)
31P and 1H nuclear magnetic resonance spectroscopy has been used to follow noninvasively the time course of energetic metabolite levels in human heart atrial appendages preserved under various temperatures and buffer conditions. From sample harvest up to the normal 5-h time limit for heart preservation, ATP levels in human atrial appendages are much better(More)
We have developed an automated, low-volume air sampler, capable of collecting multiple samples for semivolatile organic compound analysis in a short time (several hours). The new sampler uses small polyurethane foam plugs as the sampling media and a sampling carousel that has a 20 plug capacity. A computer controls the sampling protocol, and after the(More)
Changes in broadline proton nuclear magnetic resonance parameters of cell walls during growth of etiolated hypocotyls of bean (Phaseolus vulgaris L.) indicate that cell wall structure becomes more rigid during development. Most of the changes are completed in the first 6 cm below cotyledon insertion and are correlated with increased restriction of proton(More)