Synthesis of selenium nanoparticles in the presence of polysaccharides

Zhang, Shengyi; Zhang, Juan; Wang, Hongyan; Chen, Hong‐Yuan

doi:10.1016/j.matlet.2004.03.031

Cited by 200 publications

(88 citation statements)

References 15 publications

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“…Some researchers have reported the synthesis of selenium nanoparticles and their biological effects toward mammalian cells in vitro. 15,16 Others reported inhibitory effects of selenium compounds (in the form of coatings) on the growth of some types of bacteria. 17 However, the influence of selenium nanoparticles on bacteria growth remains largely unexplored.…”

Section: Discussionmentioning

confidence: 99%

Selenium nanoparticles inhibit Staphylococcus aureus growth

Tran¹,

Webster²

2011

IJN

149

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Staphylococcus aureus is a key bacterium commonly found in numerous infections. S. aureus infections are difficult to treat due to their biofilm formation and documented antibiotic resistance. While selenium has been used for a wide range of applications including anticancer applications, the effects of selenium nanoparticles on microorganisms remain largely unknown to date. The objective of this in vitro study was thus to examine the growth of S. aureus in the presence of selenium nanoparticles. Results of this study provided the first evidence of strongly inhibited growth of S. aureus in the presence of selenium nanoparticles after 3, 4, and 5 hours at 7.8, 15.5, and 31 μg/mL. The percentage of live bacteria also decreased in the presence of selenium nanoparticles. Therefore, this study suggests that selenium nanoparticles may be used to effectively prevent and treat S. aureus infections and thus should be further studied for such applications.

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Section: Discussionmentioning

confidence: 99%

Selenium nanoparticles inhibit Staphylococcus aureus growth

Tran¹,

Webster²

2011

IJN

149

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“…32,33 Briefly, 10 mL of 2.5% weight/volume (w/v) GA powder was added to 88 mL of deionized water with continuous stirring for 5 minutes at room temperature (RT), then 1 mL of 0.8 M L-ascorbic acid and 1 mL of 0.2 M H 2 SeO 3 were added with stirring for another 10 minutes to allow the reaction to complete. The colloidal selenium particles were characterized by transmission electron microscopy (TEM).…”

Section: Preparation Of Colloidal Selenium Particlesmentioning

confidence: 99%

Lateral flow test strip based on colloidal selenium immunoassay for rapid detection of melamine in milk, milk powder, and animal feed

Wang¹,

Zhi²,

Zhao³

et al. 2014

IJN

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Although high melamine (MEL) intake has been proven to cause serious health problems, MEL is sometimes illegally added to milk products and animal feed, arousing serious food safety concerns. A satisfactory method of detecting MEL in onsite or in-home testing is in urgent need of development. This work aimed to explore a rapid, convenient, and cost-effective method of identifying MEL in milk products or other food by colloidal selenium-based lateral flow immunoassay. Colloidal selenium was synthesized by L-ascorbic acid to reduce seleninic acid at room temperature. After conjugation with a monoclonal antibody anti-MEL, a test strip was successfully prepared. The detection limit of the test strip reached 150 μg/kg, 1,000 μg/kg, and 800 μg/kg in liquid milk, milk powder, and animal feed, respectively. No cross-reactions with homologues cyanuric acid, cyanurodiamide, or ammelide were found. Moreover, the MEL test strip can remain stable after storage for 1 year at room temperature. Our results demonstrate that the colloidal selenium MEL test strip can detect MEL in adulterated milk products or animal feed conveniently, rapidly, and sensitively. In contrast with a colloidal gold MEL test strip, the colloidal selenium MEL test strip was easy to prepare and more cost-efficient.

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“…In recent years, there has been an increasing interest in synthesizing metal particles using chemical and biological methods (7,10,22). The use of "green" synthesis of metal nanoparticles is going to be of considerable importance; thus, appropriate methods should be developed and tested, especially for the recovery of these nanoparticles from natural resources such as bacterial cells.…”

mentioning

confidence: 99%

Biosynthesis of selenium nanoparticles using Klebsiella pneumoniae and their recovery by a simple sterilization process

Fesharaki¹,

Nazari²,

Shakibaie³

et al. 2010

Braz. J. Microbiol.

200

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The use of biologically derived metal nanoparticles for various proposes is going to be an issue of considerable importance; thus, appropriate methods should be developed and tested for the biological synthesis and recovery of these nanoparticles from bacterial cells. In this research study, a strain of Klebsiella pneumoniae was tested for its ability to synthesize elemental selenium nanoparticles from selenium chloride. A broth of Klebsiella pneumoniae culture containing selenium nanoparticles was subjected to sterilization at 121 o C and 17 psi for 20 minutes. Released selenium nanoparticles ranged in size from 100 to 550 nm, with an average size of 245 nm. Our study also showed that no chemical changes occurred in selenium nanoparticles during the wet heat sterilization process. Therefore, the wet heat sterilization process can be used successfully to recover elemental selenium from bacterial cells.

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Synthesis of selenium nanoparticles in the presence of polysaccharides

Cited by 200 publications

References 15 publications

Selenium nanoparticles inhibit Staphylococcus aureus growth

Selenium nanoparticles inhibit Staphylococcus aureus growth

Lateral flow test strip based on colloidal selenium immunoassay for rapid detection of melamine in milk, milk powder, and animal feed

Biosynthesis of selenium nanoparticles using Klebsiella pneumoniae and their recovery by a simple sterilization process

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