Synthesis and antioxidant properties of chitosan and carboxymethyl chitosan-stabilized selenium nanoparticles

Chen, Wanwen; Li, Yanfang; Yang, Shuo; Yue, Lin; Jiang, Qixing; Xia, Wenshui

doi:10.1016/j.carbpol.2015.06.064

Cited by 166 publications

(83 citation statements)

References 49 publications

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“…50 nm (i.e., Bio SeNP extract_LB, L-cys SeNPs_1:3, and L-cys SeNPs_1:3 + OM_LB), while those larger (i.e., Bio SeNP extract_NB, L-cys SeNPs_1:4, and L-cys SeNPs_1:4 + OM_NB) absorbed light in the 300-550 nm region (Figure 4). Since similar results were reported for both biogenic [34,[63][64][65] and chemogenic [18,48,[66][67][68][69] SeNPs, this absorbance behavior can be ascribed to the presence of Se 0 at the nanoscale, whose exciton resonance effects are responsible for most of the light absorption phenomenon [61][62].…”

Section: Optical Properties Of Biogenic Senp Extracts and Chemogenic supporting

confidence: 81%

“…Since it has been described how SeITE02 cells biotransform SeO 3 2− into Se 0 through Paintertype reactions involving -SH groups [57,83], the absence of S-H stretching vibration in the FTIR spectra of the corresponding SeNP extract [57], as well as for those recovered from other bacterial strains (i.e., Ochrobactrum sp. MPV1) [69], indicate that the same Se-S interaction may take place at the NP-OM interface, which could be partially responsible for PL properties of these SeNPs. It is worth noting that to better unravel the possible occurance of Se-S interactions at the NP surface, Raman spectroscopy for the detection of typical Se-S stretching vibrations is advisable [56,[84][85]; however, this aspect goes beyond the scope of the present study.…”

Section: Photoluminescence Properties and Lifetime Measurements Of Bimentioning

confidence: 97%

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Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis

et al. 2020

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AbstractVarious technological and biomedical applications rely on the ability of materials to emit light (photoluminescence [PL]), and, among them, metal nanoparticles (NPs) and semi-conductor Quantum Dots (QDs) represent ideal candidates as sensing probes and imaging tools, portraying better PL features than conventional organic dyes. However, the knowledge of PL behavior of semiconductor NPs – i.e., selenium; SeNPs – is still in its infancy, especially for those synthesized by microorganisms. Considering the essential role played by biogenic SeNPs as antimicrobial, anticancer, and antioxidant agents, or food supplements, their PL properties must be explored to take full advantage of them as eco-friendly and versatile tools. Here, PL features of SeNPs produced by the Se-tolerant Stenotrophomonas maltophilia SeITE02 strain, compared with chemogenic ones, are investigated, highlighting the PL dependency on the NP size. Indeed, PL emission shifted from indigo-blue (emission wavelength λem 400–450 nm) to green-yellow (λem 480–570 nm) and orange-red (λem 580–700 nm) for small (ca. 50 nm) and big (ca. 100 nm) SeNPs respectively, revealing the versatility of an environmental bacterial isolate to synthesize diverse PL probes. Besides, biogenic SeNPs show PL lifetime comparable to those of the most used fluorophores, supporting their potential application as markers for (bio)imaging.

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Section: Optical Properties Of Biogenic Senp Extracts and Chemogenic supporting

confidence: 81%

Section: Photoluminescence Properties and Lifetime Measurements Of Bimentioning

confidence: 97%

Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis

et al. 2020

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“…The use of elemental Se in the form of NPs for different biological applications gained a lot of attention lately, because of several proposed advantages compared with other forms of Se, including higher bioavailability [ 98 ], lower toxicity [ 41 , 99 , 100 , 101 ], potential for local delivery of high doses into cancer cells [ 102 ]; possibility to be modified, stabilized and functionalized by various polymers such as chitosan [ 103 , 104 , 105 , 106 ] or other polysaccharides [ 107 , 108 , 109 , 110 , 111 , 112 ], proteins [ 113 , 114 ], or even combinations between them [ 115 , 116 , 117 ], smaller molecules such as polyphenols [ 118 , 119 , 120 , 121 ], sialic acids [ 122 , 123 ], folic acid or folate (as folate–chitosan smart-shell nanocapsules) [ 124 , 125 , 126 ], and other organic acids [ 37 ]. Chemical, physical, or biological methods are used for producing SeNPs [ 37 ], each having its own advantages and disadvantages.…”

Section: Conventional and Next-generation Selenium Dietary Supplemmentioning

confidence: 99%

Selenium Analysis and Speciation in Dietary Supplements Based on Next-Generation Selenium Ingredients

Constantinescu-Aruxandei

Frîncu

Capră

et al. 2018

Nutrients

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Selenium is essential for humans and the deficit of Se requires supplementation. In addition to traditional forms such as Se salts, amino acids, or selenium-enriched yeast supplements, next-generation selenium supplements, with lower risk for excess supplementation, are emerging. These are based on selenium forms with lower toxicity, higher bioavailability, and controlled release, such as zerovalent selenium nanoparticles (SeNPs) and selenized polysaccharides (SPs). This article aims to focus on the existing analytical systems for the next-generation Se dietary supplement, providing, at the same time, an overview of the analytical methods available for the traditional forms. The next-generation dietary supplements are evaluated in comparison with the conventional/traditional ones, as well as the analysis and speciation methods that are suitable to reveal which Se forms and species are present in a dietary supplement. Knowledge gaps and further research potential in this field are highlighted. The review indicates that the methods of analysis of next-generation selenium supplements should include a step related to chemical species separation. Such a step would allow a proper characterization of the selenium forms/species, including molecular mass/dimension, and substantiates the marketing claims related to the main advantages of these new selenium ingredients.

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“…FTIR spectra were analysed according to the method described by Chen et al (2015). Sample (0.02 g) was prepared by mixing with 1.0 g potassium bromide and was pressed into pellet.…”

Section: Ftir Spectra Analysismentioning

confidence: 99%

Characterisation of dominant autochthonous strains for nitrite degradation of Chinese traditional fermented fish

Liao

Jiang

et al. 2018

Int J of Food Sci Tech

Self Cite

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Summary In this study, three previously isolated dominant autochthonous strains from Chinese traditional fermented fish products (CTFPs), namely Lactobacillus plantarum 120, Saccharomyces cerevisiae 2018 and Staphylococcus xylosus 135, were used to evaluate their nitrite degradation abilities. The highest nitrite degradation rate (NDR) was observed in L. plantarum 120 (90.70%), followed by S. cerevisiae 2018 (78.75%) and S. xylosus 135 (13.09%). The nitrite reductase activities of L. plantarum 120 and S. cerevisiae 2018 could be promoted by appropriate sodium chloride contents (4%–6%). Meanwhile, nitrite could be degraded in soluble grass carp proteins, and the NDR was positively associated with the protein concentration. Inoculation with L. plantarum 120, S. cerevisiae 2018 and S. xylosus 135 significantly (P < 0.05) decreased the nitrite and nitrate concentrations in CTFPs. Therefore, dominant autochthonous strains, especially L. plantarum 120 and S. cerevisiae 2018, could be used as promising starter cultures to inhibit nitrite accumulation in CTFPs.

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Synthesis and antioxidant properties of chitosan and carboxymethyl chitosan-stabilized selenium nanoparticles

Cited by 166 publications

References 49 publications

Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis

Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis

Selenium Analysis and Speciation in Dietary Supplements Based on Next-Generation Selenium Ingredients

Characterisation of dominant autochthonous strains for nitrite degradation of Chinese traditional fermented fish

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