scholarly journals Correction: Wang, Y.T., et al. Selenite Reduction and the Biogenesis of Selenium Nanoparticles by Alcaligenes faecalis Se03 Isolated from the Gut of Monochamus alternatus (Coleoptera: Cerambycidae). Int. J. Mol. Sci. 2018, 19, 2799

2020 ◽  
Vol 21 (4) ◽  
pp. 1294
Author(s):  
Yuting Wang ◽  
Xian Shu ◽  
Qing Zhou ◽  
Tao Fan ◽  
Taichu Wang ◽  
...  
Keyword(s):  
Alcaligenes Faecalis ◽  
Selenium Nanoparticles ◽  
Monochamus Alternatus ◽  
Selenite Reduction

The authors wish to make the following corrections to this paper [...]

scholarly journals Selenite Reduction and the Biogenesis of Selenium Nanoparticles by Alcaligenes faecalis Se03 Isolated from the Gut of Monochamus alternatus (Coleoptera: Cerambycidae)

2018 ◽  
Vol 19 (9) ◽  
pp. 2799 ◽  
Author(s):  
Yuting Wang ◽  
Xian Shu ◽  
Qing Zhou ◽  
Tao Fan ◽  
Taichu Wang ◽  
...  
Keyword(s):  
Thioredoxin Reductase ◽  
Alcaligenes Faecalis ◽  
Selenium Nanoparticles ◽  
Synthesis Process ◽  
Hydrodynamic Diameter ◽  
Monochamus Alternatus ◽  
Selenite Reduction ◽  
Reduction Activity ◽  
Liquid Culture Medium

In this study, a bacterial strain exhibiting high selenite (Na2SeO3) tolerance and reduction capacity was isolated from the gut of Monochamus alternatus larvae and identified as Alcaligenes faecalis Se03. The isolate exhibited extreme tolerance to selenite (up to 120 mM) when grown aerobically. In the liquid culture medium, it was capable of reducing nearly 100% of 1.0 and 5.0 mM Na2SeO3 within 24 and 42 h, respectively, leading to the formation of selenium nanoparticles (SeNPs). Electron microscopy and energy dispersive X-ray analysis demonstrated that A. faecalis Se03 produced spherical electron-dense SeNPs with an average hydrodynamic diameter of 273.8 ± 16.9 nm, localized mainly in the extracellular space. In vitro selenite reduction activity and real-time PCR indicated that proteins such as sulfite reductase and thioredoxin reductase present in the cytoplasm were likely to be involved in selenite reduction and the SeNPs synthesis process in the presence of NADPH or NADH as electron donors. Finally, using Fourier transform infrared spectroscopy, protein and carbohydrate residues were detected on the surface of the biogenic SeNPs. Based on these observations, A. faecalis Se03 has the potential to be an eco-friendly candidate for the bioremediation of selenium-contaminated soil/water and a bacterial catalyst for the biogenesis of SeNPs.

scholarly journals Selenite reduction by the rhizobacterium Azospirillum brasilense, synthesis of extracellular selenium nanoparticles and their characterisation

2020 ◽  
Vol 58 ◽  
pp. 17-24 ◽  
Author(s):  
Anna V. Tugarova ◽  
Polina V. Mamchenkova ◽  
Vitaly A. Khanadeev ◽  
Alexander A. Kamnev
Keyword(s):  
Azospirillum Brasilense ◽  
Selenium Nanoparticles ◽  
Selenite Reduction

scholarly journals Delayed formation of zero-valent selenium nanoparticles by Bacillus mycoides SeITE01 as a consequence of selenite reduction under aerobic conditions

2014 ◽  
Vol 13 (1) ◽  
pp. 35 ◽  
Author(s):  
Silvia Lampis ◽  
Emanuele Zonaro ◽  
Cristina Bertolini ◽  
Paolo Bernardi ◽  
Clive S Butler ◽  
...  
Keyword(s):  
Selenium Nanoparticles ◽  
Bacillus Mycoides ◽  
Selenite Reduction ◽  
Aerobic Conditions

scholarly journals Development of Selenium Nanoparticle Based Agriculture Sensor for Heavy Metal Toxicity Detection

Agriculture ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 610
Author(s):  
Faheem Ahmed ◽  
Sourabh Dwivedi ◽  
Nagih M. Shaalan ◽  
Shalendra Kumar ◽  
Nishat Arshi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Toxicity ◽  
Environmental Concern ◽  
Heavy Metal Toxicity ◽  
Selenium Nanoparticles ◽  
Face Centered Cubic ◽  
Selenite Reduction ◽  
Vis Spectroscopy ◽  
Face Centered

The presence of heavy metals in increased concentrations in the environment has become a global environmental concern. This rapid increase in heavy metals in the environment is attributed to enhanced industrial and mining activities. Metal ions possess a lengthy half-life and property to bioaccumulate, are non-biodegradable and, thus, are a threat to the human health. A number of conventional spectroscopic and chromatographic techniques are being used for the detection of heavy metals, but these suffer from various limitations. Nano-based sensors have emerged as potential candidates for the sensitive and selective detection of heavy metals. Thus, the present study was focused on the synthesis of selenium nanoparticles (SeNPs) by using selenite-reducing bacteria in the development of a heavy metal toxicity biosensor. During the biosynthesis of selenium nanoparticles, supernatants of the overnight-grown culture were treated with Na2SeO32− and incubated for 24 h at 37 °C. The as-synthesized nanoparticles were characterized by UV–Vis spectroscopy, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and transmission electron microscopy (TEM) analyses. XRD and TEM results confirmed the formation of SeNPs in sizes ranging from 35 to 40 nm, with face-centered cubic (FCC) structures. The bioreduction process and validation of the formation of SeNPs was further confirmed by FTIR studies. The reduction in the biosynthesis of SeNPs using bacterial metabolite due to heavy metal cytotoxicity was analyzed by the colorimetric bioassay (SE Assay). The inhibition of selenite reduction and loss of red color in the presence of heavy metals may serve as a biosensor for heavy metal toxicity analysis. Thus, this biosensor development is aimed at improving the sensitivity and specificity of analytic detection.

scholarly journals Antibacterial Activity of Biosynthesized Selenium Nanoparticles Using Extracts of Calendula officinalis against Potentially Clinical Bacterial Strains

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5929
Author(s):  
José A Hernández-Díaz ◽  
Jorge JO Garza-García ◽  
Janet M León-Morales ◽  
Adalberto Zamudio-Ojeda ◽  
Jenny Arratia-Quijada ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Bacterial Resistance ◽  
Alcaligenes Faecalis ◽  
Selenium Nanoparticles ◽  
Bacterial Strains ◽  
Calendula Officinalis ◽  
Methanolic Extracts ◽  
Antimicrobial And Antioxidant Activity

The use of selenium nanoparticles (SeNPs) in the biomedical area has been increasing as an alternative to the growing bacterial resistance to antibiotics. In this research, SeNPs were synthesized by green synthesis using ascorbic acid (AsAc) as a reducing agent and methanolic extract of Calendula officinalis L. flowers as a stabilizer. Characterization of SeNPs was performed by UV-vis spectrophotometry, infrared spectrophotometry (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM) techniques. SeNPs of 40–60 nm and spherical morphologies were obtained. The antibacterial activity of marigold extracts and fractions was evaluated by disk diffusion methodology. The evaluation of SeNPs at different incubation times was performed through the colony-forming unit (CFU) count, in both cases against Serratia marcescens, Enterobacter cloacae, and Alcaligenes faecalis bacteria. Partial antibacterial activity was observed with methanolic extracts of marigold leaves and flowers and total inhibition with SeNPs from 2 h for S. marcescens, 1 h for E. cloacae, and 30 min for A. faecalis. In addition, SeNPs were found to exhibit antioxidant activity. The results indicate that SeNPs present a potentiated effect of both antimicrobial and antioxidant activity compared to the individual use of marigold extracts or sodium selenite (Na2SeO3). Their application emerges as an alternative for the control of clinical pathogens.

Insights into selenite reduction and biogenesis of elemental selenium nanoparticles by two environmental isolates of Burkholderia fungorum

2017 ◽  
Vol 34 ◽  
pp. 1-11 ◽  
Author(s):  
Nazanin Seyed Khoei ◽  
Silvia Lampis ◽  
Emanuele Zonaro ◽  
Kim Yrjälä ◽  
Paolo Bernardi ◽  
...  
Keyword(s):  
Selenium Nanoparticles ◽  
Elemental Selenium ◽  
Environmental Isolates ◽  
Selenite Reduction

Nomenclature Abstract for Alcaligenes faecalis faecalis Castellani and Chalmers 1919 (Approved Lists 1980).

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Nicole Danielle Osier ◽  
George M Garrity ◽  
Dorothea Taylor
Keyword(s):  
Alcaligenes Faecalis
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