Electron beam induced water-soluble silk fibroin nanoparticles as a natural antioxidant and reducing agent for a green synthesis of gold nanocolloid

Wongkrongsak, Soraya; Tangthong, Theeranan; Pasanphan, Wanvimol

doi:10.1016/j.radphyschem.2015.03.020

Cited by 26 publications

(27 citation statements)

References 28 publications

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“…For 3 % sample the activity suddenly decreased significantly to (6.626 %). The results are supported by Wongkrongsak et al (2016) findings as they concluded that, by increasing water soluble silk fibroin (WSSF) nano particles concentration, the UV absorbance of DPPH* reduced. Fig.…”

Section: Fig 1 Particle Size Distribution Curve For Flaxseed Oil MIsupporting

confidence: 63%

Flaxseed Oil Micro Particles: It’s Effect on Mulberry Silkworm, Bombyx mori L. Productivity and Antioxidant Activity

Taha

Sadek

2018

Journal of Plant Protection and Pathology

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Increasing egg production is a necessary demand for silkworm rearing continuity in Egypt. Flaxseed plant has a compound that mimics estrogen hormone in vertebrates. Emulsions contain micro particles prepared from flaxseed oil were used in the present study as an exogenous source of phyto-estrogen. Micro particles size were measured by Zeta sizer and ranging from 1053 to 4087 nm with percentages 33.4 and 66.6 %, respectively. Fifth instar larvae were topically applied with flaxseed micro particles emulsion with three concentrations (0.25, 1 and 3 %) in addition to control every 48 hrs. The present study clarify that, 0.25% concentration have a tremendous effect on egg production and cocoon characters. As well as observations related to insect performance revealed maximum larval weight, effective rate of rearing (ERR), pupation percentage, pupal weight comparing with controls. On the other hand, deleterious effect was observed for concentrations (1 and 3%). Antioxidant activities were estimated by 2,2-diphenyl-1-picrylhryl free radical (DPPH *) scavenging activity reagent and the highest activity was recorded for 1 % treatment 36.947 %.

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Section: Fig 1 Particle Size Distribution Curve For Flaxseed Oil MIsupporting

confidence: 63%

Flaxseed Oil Micro Particles: It’s Effect on Mulberry Silkworm, Bombyx mori L. Productivity and Antioxidant Activity

Taha

Sadek

2018

Journal of Plant Protection and Pathology

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“…Peaks at 1447, 1408 and 1335 cm −1 correspond to the C-H bending motion in the main backbone and side chains. The amide III at 1232 cm −1 is assigned to C-N stretching and N-H bending [28,29,30]. The FTIR spectrum of PNIPAM shows significant peaks at 3289 and 3076 cm −1 , which are assigned to N-H stretching and N-H bending resonance overtone with amide II.…”

Section: Resultsmentioning

confidence: 99%

Grafting versus Crosslinking of Silk Fibroin-g-PNIPAM via Tyrosine-NIPAM Bridges

et al. 2019

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This paper reports the synthesis and complex characterization of novel polymeric networks based on the crosslinking of Bombyx mori silk fibroin via poly(N-isopropylacrylamide) bridges generated by an ammonium cerium nitrate redox system. The research study gives an understanding of the polymerization mechanism in terms of the generation of radical sites, radical growth and termination reaction, as well as the involvement of modifications on silk fibroin structure and properties. The physico-chemical characterization was carried out by FTIR-ATR, X-ray photoelectron spectroscopy and RAMAN spectroscopy with unravelling the chemical modification. The structural characterization and spatial arrangement by secondary structure were carried out by X-ray diffraction and circular dichroism. The thermal behavior and thermal stability were evaluated by differential scanning calorimetry and thermogravimetric analysis. The novel complex polymer network is intended to be used in the field of smart drug delivery systems.

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“…Interestingly, the presence of SF in H 2 O 2 solution increased the decomposition of H 2 O 2 to H 2 O by approximately 12~30% although this increase depended on both the concentrations of SF (1 or 2%) and the mixing time (for example.10 min herein) of the SF and H 2 O 2 solutions. The entrapment of H 2 O 2 by the hydroxyl group, amine, and carboxyl group in SF may play a role in its scavenging (Figure 4b) [47]. However, the H 2 O 2 -scavenging ability of GS films exceeded that of SF (Figure 4b).…”

Section: H 2 O 2 -Scavenging By Gdes Filmsmentioning

confidence: 97%

“…Therefore, the property of scavenging H 2 O 2 locally of the films could be carried out in outdoor at low temperature. The sensing local H 2 O 2 by the films might be improved at the working temperature near 37 • C because the activity of HRP is highest at approximately 35 • C [47,48]. solution increased from 22 °C to 52 °C whereas that of the GS-containing solution increased from 24 °C to 48 °C.…”

Section: Photothermal Responses Of Gdes Filmsmentioning

confidence: 99%

Developing a Silk Fibroin Composite Film to Scavenge and Probe H2O2 Associated with UV-Excitable Blue Fluorescence

Chung¹,

Chang²,

Liao

et al. 2020

Sensors

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A silk fibroin composite film that can simultaneously scavenge and probe H2O2 in situ was developed for possibly examining local concentrations of H2O2 for biomedical applications. A multi-functional composite film (GDES) that consists of graphene oxide (G), a photothermally responsive element that was blended with polydopamine (PDA, D)/horseradish peroxidase (HRP, E) (or DE complex), and then GDE microaggregates were coated with silk fibroin (SF, S), a tyrosine-containing protein. At 37 °C, the H2O2-scavenging ability of a GDES film in solution at approximately 7.5 × 10−3 μmol H2O2/mg film was the highest compared with those of S and GS films. The intensities of UV-excitable blue fluorescence of a GDES film linearly increased with increasing H2O2 concentrations from 4.0 μM to 80 μM at 37 °C. Interestingly, after a GDES film scavenged H2O2, the UV-excitable blue fluorescent film could be qualitatively monitored by eye, making the film an eye-probe H2O2 sensor. A GDES film enabled to heat H2O2-containing samples to 37 °C or higher by the absorption of near-IR irradiation at 808 nm. The good biocompatibility of a GDES film was examined according to the requirements of ISO-10993-5. Accordingly, a GDES film was developed herein to scavenge and eye-probe H2O2 in situ and so it has potential for biomedical applications.

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Electron beam induced water-soluble silk fibroin nanoparticles as a natural antioxidant and reducing agent for a green synthesis of gold nanocolloid

Cited by 26 publications

References 28 publications

Flaxseed Oil Micro Particles: It’s Effect on Mulberry Silkworm, Bombyx mori L. Productivity and Antioxidant Activity

Flaxseed Oil Micro Particles: It’s Effect on Mulberry Silkworm, Bombyx mori L. Productivity and Antioxidant Activity

Grafting versus Crosslinking of Silk Fibroin-g-PNIPAM via Tyrosine-NIPAM Bridges

Developing a Silk Fibroin Composite Film to Scavenge and Probe H2O2 Associated with UV-Excitable Blue Fluorescence

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