Browsing Waterloo Research by Author "Pawliszyn, Janusz"
Now showing items 1-20 of 55
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Accurate Determination of the Diffusion Coefficient of Proteins by Fourier Analysis with Whole Column Imaging Detection
Zarabadi, Atefeh; Pawliszyn, Janusz (American Chemical Society, 2015-01-21)Analysis in the frequency domain is considered a powerful tool to elicit precise information from spectroscopic signals. In this study, the Fourier transformation technique is employed to determine the diffusion coefficient ... -
Application of solid phase microextraction for quantification of polyunstarurated fatty acids in biological fluids
Pirjandi, Afsoon P.; Mirnaghi, Fatemeh Sadat; Bojko, Barbara; Wasowicz, Marcin; Pawliszyn, Janusz (ACS, 2014)Development of a straightforward strategy for simultaneous quantitative analysis of nonesterified fatty acids (NEFA) species in biofluids is a challenging task because of the extreme complexity of fatty acid distribution ... -
Application of Solid Phase Microextraction for Quantitation of Polyunsaturated Fatty Acids in Biological Fluids
Birjandi, Afsoon Pajand; Mirnaghi, Fatemeh Sadat; Bojko, Barbara; Wąsowicz, Marcin; Pawliszyn, Janusz (American Chemical Society, 2014-11-17)Development of a straightforward strategy for simultaneous quantitative analysis of nonesterified fatty acids (NEFA) species in biofluids is a challenging task because of the extreme complexity of fatty acid distribution ... -
The automatic use of capillary isoelectric focusing with whole column imaging detection for carbamazepine binding to human serum albumin
Maciaiek-Jurczyk, Malgorzata; Pawliszyn, Janusz (Elsevier, 2017-08-05)The binding of the anticonvulsant drug carbamazepine (CBZ) to human serum albumin, both without (dHSA) and in the presence of fatty acids (HSA) was studied in real time by capillary isoelectric focusing with whole column ... -
Biocompatible Solid-Phase Microextraction Nanoelectrospray Ionization: An Unexploited Tool in Bioanalysis
Gómez-Ríos, Germán Augusto; Reyes-Garcés, Nathaly; Bojko, Barbara; Pawliszyn, Janusz (American Chemical Society, 2015-12-09)In recent years, different geometrical configurations of solid-phase microextraction (SPME) have been directly coupled to mass spectrometry, resulting in benefits such as diminishing matrix effects, improvement of detection ... -
Calibrant Free Sampling and Enrichment with Solid-Phase Microextraction: Computational Simulation and Experimental Verification
Alam, Md. Nazmul; Ricardez-Sandoval, Luis; Pawliszyn, Janusz (American Chemical Society, 2017-04-05)Despite the benefits of diffusion-based calibrant-free sampling based on solid-phase microextraction (SPME), this quantification approach is often underestimated due to an inadequate understanding of how extraction parameters ... -
Capturing Plant Metabolome with Direct-Immersion in Vivo Solid Phase Microextraction of Plant Tissues
Risticevic, Sanja; Souza-Silva, Erica A.; DeEll, Jennifer R.; Cochran, Jack; Pawliszyn, Janusz (American Chemical Society, 2015-12-15)For the first time, an in vivo sampling mode of direct immersion–solid phase microextraction (DI-SPME) was employed to capture the metabolome of living plant specimens, using apple (Malus × domestica Borkh.) as a model ... -
Cinnamaldehyde Characterization as an Antibacterial Agent toward E. coli Metabolic Profile Using 96-Blade Solid-Phase Microextraction Coupled to Liquid Chromatography–Mass Spectrometry
Mousavi, Fatemeh; Bojko, Barbara; Bessonneau, Vincent; Pawliszyn, Janusz (American Chemical Society, 2016-01-26)Sampling and sample preparation plays an important role in untargeted analysis as it influences final composition of the analyzed extract and consequently reflection of the metabolome. In the current work, mechanism of ... -
Coupling solid phase microextraction to complementary separation platforms for metabotyping of E. coli metabolome in response to natural antibacterial agents
Mousavi, Fatemeh; Gionfriddo, Emanuela; Carasek, Eduardo; Souza-Silva, Erica A.; Pawliszyn, Janusz (Springer, 2016-11-02)Introduction Essential oils are known to possess antimicrobial activity; thus, their use has played an important role over the years in medicine and for food preservation purposes. Objective The effect of clove oil and its ... -
A critical review of solid phase microextraction for analysis of water samples
Piri-Moghadam, Hamed; Ahmadi, Fardin; Pawliszyn, Janusz (Elsevier, 2016-12-01)The review summarizes applications of solid phase microextraction (SPME) for water sample analysis. Official methods and standards of SPME in water research and inter-laboratory validation are discussed. A comparison of ... -
Determination of Polycyclic Aromatic Hydrocarbons in Sediment by Pressure-Balanced Cold Fiber Solid Phase Microextraction
Xu, Shengrui; Shuai, Qin; Pawliszyn, Janusz (American Chemical Society, 2017-09-20)An improved performance of the cold fiber solid phase micro extraction (CF-SPME) technique was accomplished with the use of the pressure balanced procedure. In order to obtain a pressure-balanced state during extraction ... -
Development and validation of a fully automated solid phase microextraction high throughput method for quantitative analysis of multiresidue veterinary drugs in chicken tissue
Khaled, Abir; Gionfriddo, Emanuela; Acquaro Jr, Vinicius; Singh, Varoon; Pawliszyn, Janusz (Elsevier, 2019-05-16)This paper presents the development and validation of a fully automated, high-throughput multiclass, multiresidue method for quantitative analysis of 77 veterinary drugs in chicken muscle via direct immersion solid phase ... -
Development and validation of eco-friendly strategies based on thin film microextraction for water analysis
Piri-Moghadam, Hamed; Gionfriddo, Emanuela; Grandy, Jonathan J.; Alam, Md. Nazmul; Pawliszyn, Janusz (Elsevier, 2018-12-07)The aim of the current study is the establishment of Green Analytical Chemistry strategies for water analysis by elimination/reduction of hazardous chemicals, energy consumption, and waste generation throughout the entire ... -
Development of a Carbon Mesh Supported Thin Film Microextraction Membrane As a Means to Lower the Detection Limits of Benchtop and Portable GC/MS Instrumentation
Grandy, Jonathan J.; Boyaci, Ezel; Pawliszyn, Janusz (American Chemical Society, 2015-12-18)In this work, a durable and easy to handle thin film microextraction (TFME) device is reported. The membrane is comprised of poly(divinylbenzene) (DVB) resin particles suspended in a high-density polydimethylsiloxane (PDMS) ... -
Development of a multichannel microfluidic system with Schlieren imaging microscopy for online chip-based moving boundary electrophoresis
Zarabadi, Atefeh S.; Pawliszyn, Janusz; Hajialamdari, Mojtaba (Elsevier, 2017-02-10)The concentration gradient detection method based on the Schlieren optics employed for electrophoresis analyses by extending the technology to a multi-channel system using a prototyped microfluidic chip (thinXXS Micro-technology, ... -
Development of Needle Trap Technology for On-Site Determinations: Active and Passive Sampling
Asl-Hariri, Saba; Gómez-Ríos, Germán Augusto; Gionfriddo, Emanuela; Dawes, Peter; Pawliszyn, Janusz (American Chemical Society, 2014-05-19)This study presents a thorough evaluation of new prototypes of extended tip needle trap devices (NT), as well as their application to in situ sampling of biological emissions and active/passive on-site sampling of indoor ... -
Development of Needle Trap Technology for On-Site Determinations: Active and Passive Sampling
Asl-Hariri, Saba; Gómez-Ríos, Germán Augusto; Gionfriddo, Emanuela; Dawes, Peter; Pawliszyn, Janusz (ACS, 2014)This study presents a thorough evaluation of new prototypes of extended tip needle trap devices (NT), as well as their application to in situ sampling of biological emissions and active/passive on-site sampling of indoor ... -
Direct coupling of solid phase microextraction with electrospray ionization mass spectrometry: A Case study for detection of ketamine in urine
Hu, Bin; Zheng, Bo; Rickert, Daniel; Gómez-Ríos, Germán Augusto; Bojko, Barbara; Pawliszyn, Janusz; Yao, Zhong-Ping (Elsevier, 2019-10-10)Electrospray ionization mass spectrometry (ESI-MS) is a commonly used technique for analysis of various samples. Solid phase microextraction (SPME) is a simple and efficient technique that combines both sampling and sample ... -
Direct immersion solid-phase microextraction analysis of multi-class contaminants in edible seaweeds by gas chromatography-mass spectrometry
Zhang, Li; Gionfriddo, Emanuela; Acquaro Jr, Vinicius; Pawliszyn, Janusz (Elsevier, 2018-11-15)The present work aimed at the development of a simple and accurate direct immersion-solidphase microextraction-gas-chromatography-mass spectrometry (DI-SPME-GC-MS) method for simultaneous determination of PAHs, PCBs, and ... -
Dose-dependent dissociation of pro-cognitive effects of donepezil on attention and cognitive flexibility in rhesus monkeys
Hassani, Seyed A.; Lendor, Sofia; Neumann, Adam; Roy, Kanchan Sinha; Boroujeni, Kianoush Banaie; Hoffman, Kari L.; Pawliszyn, Janusz; Womelsdorf, Thilo (Elsevier, 2021-11)BACKGROUND Donepezil exerts pro-cognitive effects by non-selectively enhancing acetylcholine (ACh) across multiple brain systems. Two brain systems that mediate pro-cognitive effects of attentional control and cognitive ...