Baleen-Mimicking Virtual Filters for Rapid Detection of Pathogenic Bacteria in Water Using Magnetic Nanoparticle Chains and a Halbach Ring

ACS Sensors ◽  
2020 ◽  
Vol 5 (11) ◽  
pp. 3432-3437
Author(s):  
Hyeonjeong Lee ◽  
Hyunsoo Han ◽  
Sangmin Jeon
Keyword(s):  
Rapid Detection ◽  
Magnetic Nanoparticle ◽  
Pathogenic Bacteria ◽  
Nanoparticle Chains

Recent progress on microfluidic biosensors for rapid detection of pathogenic bacteria

2021 ◽  
Author(s):  
Gaowa Xing ◽  
Weifei Zhang ◽  
Nan Li ◽  
Qiaosheng Pu ◽  
Jin-Ming Lin
Keyword(s):  
Rapid Detection ◽  
Pathogenic Bacteria ◽  
Recent Progress

Development of multiplex PCR assay for rapid detection Listeria monocytogenes in clinical samples

2021 ◽  
Vol 30 (4) ◽  
pp. 20-26
Author(s):  
Le Thanh Huong ◽  
Ha Thi Phuong Mai ◽  
Hoang Thi Thu Ha ◽  
Nguyen Dong Tu ◽  
Bui Tien Sy ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Multiplex Pcr ◽  
Rapid Detection ◽  
Pathogenic Bacteria ◽  
Vulnerable Groups ◽  
Clinical Samples ◽  
Specific Gene ◽  
Pcr Assay ◽  
Multiplex Pcr Assay ◽  
Specificity And Sensitivity

Listeria monocytogenes is widely present in the natural environment. This bacteria can cause infections in both humans and animals. In humans, the most vulnerable groups to be infected with L. monocytogenes are the elderly, people with an impaired immune system and chronically illness, pregnant women, and newborn babies. The aim of this study was to develop a multiplex PCR assay for the rapid detection of L. monocytogenes in mock clinical samples. A pair of primers were designed for detection of L. monocytogenes based on prs, a Listeria genus specific gene, and hly, a hemolysin gene. The specificity of the primers were tested by using different L. monocytogenes strains and other common pathogenic bacteria. The results showed that L. monocytogenes strains were positive in the detection and other tested strains were negative in mock (spiked) clinical samples. The sensitivity of multiplex PCR assay was 102 CFU/ml per reaction. The specificity and sensitivity of multiplex PCR technology for detecting L. monocytogenes in mock (spiked) clinical samples were high, and the assay could be completed within 1.5 hours. Therefore, this established multiplex PCR provides a rapid and reliable method and will be useful for the detection of L. monocytogenes in mock clinical samples.

BIREFRINGENCE AND MAGNETO-OPTICAL PROPERTIES IN OLEIC ACID COATED Fe3O4 NANOPARTICLES: APPLICATION FOR OPTICAL SWITCH

2011 ◽  
Vol 10 (03) ◽  
pp. 515-520 ◽  
Author(s):  
SI-HUA XIA ◽  
JUN WANG ◽  
ZHANG-XIAN LU ◽  
FEIYAN ZHANG
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Magnetic Nanoparticle ◽  
Optical Switch ◽  
Colloidal Suspension ◽  
Experimental Parameters ◽  
Nanoparticle Chains ◽  
The Magnetic Field

We report magneto-optical properties in a kerosene colloidal suspension of oleic acid coated Fe3O4 nanoparticles (~14 nm). The magnetic colloids (fluids) show birefringence under a magnetic field. Systematical studies of the on–off switch times upon application of the on–off magnetic field with varied experimental parameters indicate that the switch response time depends strongly on the strength of the magnetic field and the concentration of the magnetic nanoparticles in the fluid. The data can be explained in terms of the formation of magnetic nanoparticle chains under a magnetic field. The important magneto-optical properties of the magnetic fluids allow us to design a tunable optical switch.

scholarly journals Magnetic Nanoparticle Chains in Gelatin Ferrogels: Bioinspiration from Magnetotactic Bacteria

2019 ◽  
Vol 29 (45) ◽  
pp. 1905996 ◽  
Author(s):  
Sebastian Sturm ◽  
Maria Siglreitmeier ◽  
Daniel Wolf ◽  
Karin Vogel ◽  
Micha Gratz ◽  
...  
Keyword(s):  
Magnetic Nanoparticle ◽  
Magnetotactic Bacteria ◽  
Nanoparticle Chains

Colorimetric detection of pathogenic bacteria using platinum-coated magnetic nanoparticle clusters and magnetophoretic chromatography

2015 ◽  
Vol 883 ◽  
pp. 61-66 ◽  
Author(s):  
Donghoon Kwon ◽  
Sanghee Lee ◽  
Myung Mo Ahn ◽  
In Seok Kang ◽  
Ki-Hwan Park ◽  
...  
Keyword(s):  
Magnetic Nanoparticle ◽  
Pathogenic Bacteria ◽  
Colorimetric Detection ◽  
Nanoparticle Clusters

scholarly journals Using millimeter‐waves for rapid detection of pathogenic bacteria in food based on bacteriophage

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Kamel S. Sultan ◽  
Tamer A. Ali ◽  
Nada A. Fahmy ◽  
Ayman El‐Shibiny
Keyword(s):  
Millimeter Waves ◽  
Rapid Detection ◽  
Pathogenic Bacteria
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