Redox properties of polyelectrolyte multilayer modified electrodes: a significant effect of the interactions between the polyelectrolyte layers in the films

Strawski, Marcin; Granicka, Ludomira; Szklarczyk, Marek

doi:10.1016/j.electacta.2016.12.194

Cited by 7 publications

(3 citation statements)

References 54 publications

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“…EB and TS results of CG control lms were 37.24% and 33.01 MPa, while for CG-CCSE2, they were stated to be 70.03% and 63.23 MPa, respectively. The increased TS and EB in CG-CCSE lms were due to abundant hydroxyl groups in citric acid and polyphenols that could form hydrogen bonds with the hydroxyl groups in CMC/GA, resulting in stronger interfacial adhesion between CG and CCSE [50]. Similar ndings have previously been published [4,48].…”

Section: Mechanical Property Of Cg-ccse Lmsupporting

confidence: 82%

Identification and quantification of Cinnamomum camphora seeds extract and development of citric acid and polyphenols based carboxymethyl chitosan-gum Arabic hybrid film for intelligent packaging applications

Alnadari

Bassey

Abdin

et al. 2022

Preprint

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In this study, carboxymethyl chitosan with gum Arabic (CG) based novel functional films containing Cinnamomum camphora seeds extract (CCSE) at varying concentrations (0.5, 1.2 and 2% in w/w) were successfully fabricated. Moreover, sixteen phenolic compounds were identified by LC-ESI-QTOF-MS and the most abundant organic acid was citric acid (present at 1062.55 µg/g dry weight in CCSE). SEM showed that higher extract concentration indicated a homogeneous surface and more stability of films. CCSE inclusion into CG resulted in a marked increase (33.01 to 63.23 MPa) of tensile properties, with optimum thickness. The swelling degree, water solubility, and water vapor permeability were markedly (p < 0.05) reduced from 54.21 to 31.70%, 32.05 to 14.02%, and 3.46 to 1.12 × 10−11g−1s−1Pa−1, respectively. The open control and CG samples showed much higher peroxide values of sunflower oil (69.49 ± 0.68 and 20.15 ± 0.31 mEq/kg, respectively) while CG-CCSE2 exhibited a low value (9.79 ± 0.28 mEq/kg) after 28 days incubation. The good antioxidant and antimicrobial properties exhibited by the fabricated films demonstrated their potential use in the food packaging industry.

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Section: Mechanical Property Of Cg-ccse Lmsupporting

confidence: 82%

Identification and quantification of Cinnamomum camphora seeds extract and development of citric acid and polyphenols based carboxymethyl chitosan-gum Arabic hybrid film for intelligent packaging applications

Alnadari

Bassey

Abdin

et al. 2022

Preprint

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“…One of these endogenous analgesics is PAP, an enzyme that can hydrolyze AMP (adenosine monophosphate) to extracellular adenosine. There are reports that PAP, which was originally identified as a secretory protein enriched in the prostate gland and has been used as a marker of diagnosis and therapy of prostatic cancer , is an enzyme which is expressed in DRG and whose transmembrane isoform is a marker of nociceptive stimulus . When PAP is found in higher concentrations, it indicates that there is a decrease in AMP which is a sensitizer for nociceptive neurons, and therefore reduces nociceptive signaling producing an indirect analgesic activity .…”

Section: Discussionmentioning

confidence: 99%

Pain management using photobiomodulation: Mechanisms, location, and repeatability quantified by pain threshold and neural biomarkers in mice

Sousa

Kawakubo

Ferraresi

et al. 2018

Journal of Biophotonics

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Photobiomodulation (PBM) is a simple, efficient and cost-effective treatment for both acute and chronic pain. We previously showed that PBM applied to the mouse head inhibited nociception in the foot. Nevertheless, the optimum parameters, location for irradiation, duration of the effect and the mechanisms of action remain unclear. In the present study, the pain threshold in the right hind paw of mice was studied, after PBM (810 nm CW laser, spot size 1 or 6 cm , 1.2-36 J/cm ) applied to various anatomical locations. The pain threshold, measured with von Frey filaments, was increased more than 3-fold by PBM to the lower back (dorsal root ganglion, DRG), as well as to other neural structures along the pathway such as the head, neck and ipsilateral (right) paw. On the other hand, application of PBM to the contralateral (left) paw, abdomen and tail had no effect. The optimal effect occurred 2 to 3 hours post-PBM and disappeared by 24 hours. Seven daily irradiations showed no development of tolerance. Type 1 metabotropic glutamate receptors decreased, and prostatic acid phosphatase and tubulin-positive varicosities were increased as shown by immunofluorescence of DRG samples. These findings elucidate the mechanisms of PBM for pain and provide insights for clinical practice.

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“…Recent research has witnessed an increased interest in developments of micro- and nanostructures to be used in miniature devices [1]. Microstructures can be developed based on various materials, some of which are frequently used polyelectrolytes [2,3].…”

Section: Introductionmentioning

confidence: 99%

Bioelectrochemical Properties of Enzyme-Containing Multilayer Polyelectrolyte Microcapsules Modified with Multiwalled Carbon Nanotubes

et al. 2019

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This work investigated changes in the biochemical parameters of multilayer membrane structures, emerging at their modification with multiwalled carbon nanotubes (MWCNTs). The structures were represented by polyelectrolyte microcapsules (PMCs) containing glucose oxidase (GOx). PMCs were made using sodium polystyrene sulfonate (polyanion) and poly(allylamine hydrochloride) (polycation). Three compositions were considered: with MWCNTs incorporated between polyelectrolyte layers; with MWCNTs inserted into the hollow of the microcapsule; and with MWCNTs incorporated simultaneously into the hollow and between polyelectrolyte layers. The impedance spectra showed modifications using MWCNTs to cause a significant decrease in the PMC active resistance from 2560 to 25 kOhm. The cyclic current–voltage curves featured a current rise at modifications of multilayer MWCNT structures. A PMC-based composition was the basis of a receptor element of an amperometric biosensor. The sensitivity of glucose detection by the biosensor was 0.30 and 0.05 μA/mM for PMCs/MWCNTs/GOx and PMCs/GOx compositions, respectively. The biosensor was insensitive to the presence of ethanol or citric acid in the sample. Polyelectrolyte microcapsules based on a multilayer membrane incorporating the enzyme and MWCNTs can be efficient in developing biosensors and microbial fuel cells.

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Redox properties of polyelectrolyte multilayer modified electrodes: a significant effect of the interactions between the polyelectrolyte layers in the films

Cited by 7 publications

References 54 publications

Identification and quantification of Cinnamomum camphora seeds extract and development of citric acid and polyphenols based carboxymethyl chitosan-gum Arabic hybrid film for intelligent packaging applications

Identification and quantification of Cinnamomum camphora seeds extract and development of citric acid and polyphenols based carboxymethyl chitosan-gum Arabic hybrid film for intelligent packaging applications

Pain management using photobiomodulation: Mechanisms, location, and repeatability quantified by pain threshold and neural biomarkers in mice

Bioelectrochemical Properties of Enzyme-Containing Multilayer Polyelectrolyte Microcapsules Modified with Multiwalled Carbon Nanotubes

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