A5076585216- Advanced MRI Techniques and Applications
- Image and Signal Denoising Methods
- NMR spectroscopy and applications
- Microbial Metabolites in Food Biotechnology
- Medical Imaging Techniques and Applications
- Enzyme Production and Characterization
- Biofuel production and bioconversion
- Advanced Electrical Measurement Techniques
- Advanced Neuroimaging Techniques and Applications
- Software Testing and Debugging Techniques
- Software Engineering Research
- Software Engineering Techniques and Practices
- Digital Filter Design and Implementation
- MRI in cancer diagnosis
- Probiotics and Fermented Foods
- Microbial metabolism and enzyme function
- Ultrasound Imaging and Elastography
- Seismic Imaging and Inversion Techniques
- Neural Networks and Applications
- Software Reliability and Analysis Research
- Retinal and Macular Surgery
- Advanced Image Processing Techniques
- Laser Design and Applications
- Retinal Diseases and Treatments
- Electron Spin Resonance Studies
University of Calgary
2012-2023
Princeton University
2019-2023
George Washington University
2023
Cornell University
2021
Foothills Medical Centre
2021
Brigham and Women's Hospital
2019
Centre for Drug Research and Development
2015
Vancouver Biotech (Canada)
2015
nLIGHT (United States)
2013
Agricultural Research Service
2008
Abstract Partial Fourier reconstruction algorithms exploit the redundancy in magnetic resonance data sets so that half of is calculated during image rather than acquired. The conjugate synthesis, Margosian, homodyne detection, Cuppen and POCS are evaluated using spatial frequency domain analysis to show their characteristics where limitations may occur. phase correction used partial equivalent a convolution importance accurately implementing this demonstrated. New approaches, based on...
Methanosarcina strain 227 exhibited exponential growth on sodium acetate in the absence of added H 2 . Under these conditions, rates methanogenesis were limited by concentrations below 0.05 M. One mole methane was formed per consumed. Additional evidence from radioactive labeling studies indicated that sufficient energy for obtained decarboxylation acetate. Diauxic and sequential methanol followed occurred presence mixtures Detailed showed methanol-grown cells did not metabolize methanol,...
Improved molecular disassembly and depolymerization of grain starch to glucose are key reducing energy use in the bioconversion chemicals, ingredients, fuels. In fuel ethanol production, these biorefining steps 10−20% content ethanol. The need minimize raise net yield can be met by replacing high-temperature, liquid-phase, enzymatic digestion with low temperature, solid-phase, digestion. Also called cold hydrolysis, approach is a step toward "green" method for production There has been...
An acetate-fermenting strain of Methanosarcina was isolated from an acetate enrichment culture inoculated with anaerobic sludge a waste treatment digestor. In pure culture, this organism fermented in the absence added hydrogen at rates comparable magnitude to those found digestor systems. This rate significantly higher than previously obtained for cultures genus. Mineral components yeast extract were highly stimulatory growing on methanol. Comparable stimulation not observed acetate....
Estimating the true signal‐to‐noise ratio (SNR) of magnetic resonance (MR) images with low signal is confounded by magnitude presentation data. This paper suggests a simple solution to this problem. A common method measuring SNR compares mean standard deviation noise. measure was found be satisfactory for high but not image regions because noise bias. These inconsistencies are removed introducing unbiased definitions and levels in terms their root‐mean‐square values. The approaches compared...
Defects in metal–organic frameworks (MOFs) primarily manifest as missing linkers or metal nodes induced through synthesis, post-synthetic modification, and/or exposure to reaction conditions. By changing the nature of active site(s) and perturbing crystalline frameworks, defects confer physicochemical alterations MOF catalysts that may promote inhibit intrinsic reactivity, electron transfer excitation, mass transport. However, complexity dynamic character often obfuscate structure–function...
Sorghum bicolor is a close relative of maize and staple crop in Africa much the developing world because its superior tolerance arid growth conditions. We have generated sequence from hypomethylated portion sorghum genome by applying methylation filtration (MF) technology. The evidence suggests that 96% genes been tagged, with an average coverage 65% across their length. Remarkably, this level gene discovery was accomplished after generating raw less than 300 megabases 735-megabase genome....
ABSTRACT Lactobacillus reuteri LB 121 cells growing on sucrose synthesize large amounts of a glucan ( d -glucose) and fructan -fructose) with molecular masses 3,500 150 kDa, respectively. Methylation studies 13 C or 1 H nuclear magnetic resonance analysis showed that the has unique structure consisting terminal, 4-substituted, 6-substituted, 4,6-disubstituted α-glucose in molar ratio 1.1:2.7:1.5:1.0. The was identified as (2→6)-β- -fructofuranan levan, first example levan synthesis by...
[This corrects the article on p. 995 in vol. 39.][This 996 39.].
Lactobacillus delbrueckii ssp. bulgaricus NCFB 2772 produced an extracellular polysaccharide when grown in a chemically defined medium with glucose or lactose as the substrate carbohydrate. The isolated had sugar composition of glucose, galactose and rhamnose ratio 1:6.8:0.7. production polysaccharides increased at higher temperatures, but bacterium rapidly lost its producing ability 47°C. Production was growth‐related: no found after growth ceased. An excess carbohydrate did not result production.
Quantitative cerebral blood flow (CBF) values can be obtained from dynamic susceptibility contrast (DSC) MR perfusion studies using the standard singular value decomposition (sSVD) deconvolution algorithm. Reports in literature simulation and vivo suggest that CBF estimates sSVD depend on arterial-tissue delay (ATD). By contrast, Fourier transform (FT) produces are independent of ATD. The diagnostic reliability quantitative measurements to define areas normal tissue at risk is brought into...
The modeling of data is an alternative to conventional use the fast Fourier transform (FFT) algorithm in reconstruction magnetic resonance (MR) images. application FFT leads artifacts and resolution loss image associated with effective window on experimentally-truncated phase encoded MR data. transient error method treats as a subset response infinite impulse filter (H(z) = B(z)IA(z)). Thus, are approximated by deterministic autoregressive moving average (ARMA) model. for calculating...
The discovery of AD epigenetic signatures lays a molecular basis for new methods to detect early using patient blood cells.
The aim of this work was to investigate the medium requirements for growth and production exopolysaccharides by Lactobacillus delbrueckii subsp. bulgaricus NCFB 2772. strain grown in batch cultures on a chemically defined medium, technique single omission components applied determine nutritional requirements. aspartic acid, glutamic or glycine affected only slightly, glutamine, asparagine, threonine resulted stronger reduction growth. All other amino acids were essential. Multiple omissions...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical, kinetic, and circular dichroic consequences of mutations at position 82 yeast iso-1-cytochrome cSteven P. Rafferty, Linda L. Pearce, Paul D. Barker, J. Guy Guillemette, Cyril M. Kay, Michael Smith, A. Grant MaukCite this: Biochemistry 1990, 29, 40, 9365–9369Publication Date (Print):October 1, 1990Publication History Published online1 May 2002Published inissue 1 October...
2-Bromoethanesulfonate (BES) inhibition of methanogenesis from methanol by resting-cell suspensions or cell extracts Methanosarcina was reversed coenzyme M. BES methylcoenzyme M methylreductase activity in cell-free but not Methanol/coenzyme methyltransferase inhibited 10 microM BES. Inhibition and 3-bromopropionate competitive with M, 2-bromoethanol exhibited mixed kinetics. The Ki values for the inhibitors were similar to concentrations which intact cells. BES-resistant mutants strain 227...
Abstract The extraction of zinc, cadmium and mercury from chloride sulphate media by solvating extractants, liquid anion cation exchangers has been reviewed both the literature experiment. results have discussed in terms practical process possibilities use slope analysis to identify extracted species. These show that cannot give positive unambiguous identification stoichiometry systems which metal species contains coordinating ligands aqueous phase. However, Zn Cd di(2‐ethylhexyl)phosphoric...
Mycobacterium strain DP was isolated from marine coastal sediment and tested for its ability to oxidize cholesterol in Tween 80-cholesterol (2.59 mM) medium. Strain degraded 4-cholesten-3-one (cholestenone), 4-androsten-3,17-dione (AD), 1,4-androstadien-3,17-dione (ADD), testosterone, 1-dehydrotestosterone (DHT). Cholesterol disappeared about 4 days. Cholestenone, AD, DHT accumulations were transient with peak concentrations of 300, 600, 30 40, 21 microM. ADD production peaked after 6 days a...
Test driven development (TDD) is a relatively new software process. On the strength of anecdotal evidence and number empirical evaluations, TDD starting to gain momentum as primary means developing in organizations worldwide. In traditional development, tests are for verification validation purposes built after target product feature exists. test-driven used specification addition validation. An experiment was devised investigate distinction between traditional, test-last from perspective...
It is shown that multicomponent exponential decays can be analysed using a technique which produces spectrum whose peaks correspond in amplitude and position to the various components present data. This analogous Fourier Transform provides of frequency (complex exponentials) signal. Three techniques—the Orthonormal Exponential Transform, Inverse Laplace Gardner are examined their relative effectiveness producing desired spectra from theoretically generated experimental data discussed....