Deborah J. Roberts

ORCID: 0000-0002-0668-2001
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Chemical Analysis and Environmental Impact
  • Water Treatment and Disinfection
  • Microbial Fuel Cells and Bioremediation
  • Microbial bioremediation and biosurfactants
  • Wastewater Treatment and Nitrogen Removal
  • Electrochemical sensors and biosensors
  • Toxic Organic Pollutants Impact
  • Agriculture Sustainability and Environmental Impact
  • Drilling and Well Engineering
  • Acoustic Wave Resonator Technologies
  • Odor and Emission Control Technologies
  • Biofuel production and bioconversion
  • Microwave and Dielectric Measurement Techniques
  • Indoor Air Quality and Microbial Exposure
  • Ruminant Nutrition and Digestive Physiology
  • Soil and Water Nutrient Dynamics
  • Anaerobic Digestion and Biogas Production
  • Extraction and Separation Processes
  • Hydraulic Fracturing and Reservoir Analysis
  • Microbial Metabolic Engineering and Bioproduction
  • Chemical Synthesis and Characterization
  • Soil and Unsaturated Flow
  • Efficiency Analysis Using DEA
  • Offshore Engineering and Technologies
  • Sustainable Agricultural Systems Analysis

University of Northern British Columbia
2021-2023

Okanagan University College
2007-2021

University of British Columbia
2009-2021

Scotland's Rural College
2008-2016

University of Manchester
2012

University of Houston
1997-2009

Queen's University Belfast
1990-2009

NHS Dumfries and Galloway
2007

University of Reading
2007

Colgate University
2004

We examined the bioremediation of soils contaminated with munition compounds 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine, and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetraazocine by a procedure that produced anaerobic conditions in promoted biodegradation nitroaromatic contaminants. This consisted flooding 50 mM phosphate buffer, adding starch as supplemental carbon substrate, incubating under static conditions. Aerobic heterotrophs, present naturally soil or added an...

10.1128/aem.59.7.2171-2177.1993 article EN Applied and Environmental Microbiology 1993-07-01

10.1016/s0964-8305(02)00049-5 article EN International Biodeterioration & Biodegradation 2002-06-01

Microwave resonator sensors are attractive for their contactless and label-free capability of monitoring bacterial growth in liquid media. This paper outlines a new microwave biosensor based on pair planar split ring resonators non-invasive solid agar The sensor is comprised two with slightly different resonant frequencies differential operation. transmission coefficient (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</sub> ) the...

10.1109/tbcas.2019.2952841 article EN IEEE Transactions on Biomedical Circuits and Systems 2019-11-11

10.1016/s0964-8305(98)00049-3 article EN International Biodeterioration & Biodegradation 1998-07-01

This work presents the development of a coplanar waveguide based split ring resonator, integrated with microfluidic channel suitable for liquid sensing applications. The sensor was fabricated via photolithography on 0.5 mm borosilicate glass substrate patterned gold. aligned area and bonded to ensure consistent volume (0.784 μL) over region. microwave 1.5 × 3 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> had resonant frequency...

10.1109/jsen.2020.2991349 article EN IEEE Sensors Journal 2020-04-29

The effect of peptide charge on the self-assembly, gelation behavior, and model drug release profiles has been explored here for three octa-peptides, VEVKVEVK (VEK2), VKVKVEVK (VEK3), VEVEVKVE (VEK1), that carry a net 0, +2, -2 at neutral pH, respectively. Transparent, self-supporting hydrogels were found to form above critical concentration when modulus was >1 this independent sign charge. TEM, SAXS, shear rheology revealed there no differences in hydrogel structure or mechanical properties...

10.1021/la303328p article EN Langmuir 2012-10-23

This letter presents a practical application of differential microstrip microwave sensor for label-free and realtime monitoring Escherichia coli (E. coli) growth under different nutritional conditions on solid agar media. Two planar ring resonators coupled with one-port power divider form the core sensing system. The resonator operates at 1.509 GHz an amplitude -10.21 dB reference 1.798 -11.75 dB. profile E. each glucose concentration in Luria-Bertani (LB) was derived by measuring resonant...

10.1109/lmwc.2020.2980756 article EN IEEE Microwave and Wireless Components Letters 2020-04-01

A novel soil treatment method for achieving the removal of dinoseb (2-sec-butyl-4,6-dinitrophenol) from contaminated soils was investigated. One contained as major contaminant, although several other hazardous compounds were also present. second highly with dinoseb. Dinoseb not degraded in these under aerobic conditions at each site. Pretreatment by addition a starchy potato-processing by-product and flooding phosphate buffer stimulated consumption oxygen nitrate soils, thereby lowering...

10.1128/aem.58.5.1683-1689.1992 article EN Applied and Environmental Microbiology 1992-05-01

The metabolism of m -cresol by methanogenic cultures enriched from domestic sewage sludge was investigated. In the initial studies, bromoethanesulfonic acid used to inhibit methane production. This led accumulation 4.0 � 0.8 mol acetate per metabolized. These results suggested that CO 2 incorporation occurred because each molecule contained seven carbon atoms, whereas four molecules product a total eight atoms. To verify this, [ 14 C]bicarbonate added acid-inhibited cultures, and those...

10.1128/aem.56.2.472-478.1990 article EN Applied and Environmental Microbiology 1990-02-01
Coming Soon ...