The Twice-Oxidized Graphene Oxide/Gold Nanoparticles Composite SERS Substrate for Sensitive Detection of Clenbuterol Residues in Animal-Origin Food Samples

2020 ◽  
Vol 13 (4) ◽  
pp. 902-910
Author(s):  
Jie Cheng ◽  
Mengdie Fan ◽  
Peilong Wang ◽  
Xiao-Ou Su
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Food Samples ◽  
Sensitive Detection ◽  
Animal Origin ◽  
Sers Substrate ◽  
Animal Origin Food

scholarly journals Occurrence and Antimicrobial Susceptibility Profile of Salmonella Isolates from Animal Origin Food Items in Selected Areas of Arsi Zone, Southeastern Ethiopia, 2018/19

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Minda Asfaw Geresu ◽  
Behailu Assefa Wayuo ◽  
Gezahegne Mamo Kassa
Keyword(s):  
Antimicrobial Susceptibility ◽  
Control Strategies ◽  
Raw Milk ◽  
Food Samples ◽  
Animal Origin ◽  
Salmonella Spp ◽  
Food Items ◽  
Antimicrobial Susceptibility Profile ◽  
Arsi Zone ◽  
Animal Origin Food

The status of Salmonella and its antimicrobial susceptibility profile in animal origin food items from different catering establishments in Ethiopia is scarce. Hence, this study aimed to investigate the occurrence and antimicrobial susceptibility profile of Salmonella isolates from animal origin food items in the selected areas of Arsi Zone. One hundred ninety-two animal origin food samples were collected and processed for Salmonella isolation. Isolates were tested for their susceptibility to 13 antimicrobials using Kirby–Bauer disk diffusion assay. An overall prevalence of 9.4% (18/192) Salmonella spp. isolates were recovered from animal origin food samples collected from different catering establishments. Seven (21.9%) of “Dulet,” 4 (12.5%) of “Kitfo,” 3 (9.4%) of “Kurt,” 2 (6.3%) of raw milk, 1 (3.1%) of egg sandwich and 1 (3.1%) of cream cake samples were positive for Salmonella. Catering establishments, protective clothing, source of contamination, manner of hand washing, and money handling were among the putative risk factors that were significantly associated ( p < 0.05 ) with Salmonella spp. occurrence. Ampicillin, nitrofurans, and sulphonamide resistance were significantly associated ( p < 0.05 ) with Salmonella spp. occurrence in the selected food items. Three (16.7%), 5 (27.8%), 5 (27.8%), and 4 (22.2%) of the isolates were resistant to 3, 4, 5, and 6 antibiotics, respectively, whereas only a sole isolate was resistant to two antibiotics (viz. ampicillin and kanamycin). In conclusion, the general sanitary condition of the catering establishments, utensils used, and personnel hygienic practices were not to the recommended standards in the current study. Besides, detection of multidrug-resistant strains of Salmonella in animal origin food items from different catering establishments suggests the need for detailed epidemiological and molecular characterization of the pathogen so as to establish the sources of acquisition of resistant Salmonella strains. Hence, implementation of Salmonella prevention and control strategies from farm production to consumption of animal origin food items are crucial.

Gold nanoparticles-functionalized microorganisms assisted construction of immunobiosensor for sensitive detection of ochratoxin A in food samples

2019 ◽  
Vol 299 ◽  
pp. 126969 ◽  
Author(s):  
Tong Bu ◽  
Meng Zhang ◽  
Xinyu Sun ◽  
Yongming Tian ◽  
Feier Bai ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ochratoxin A ◽  
Food Samples ◽  
Sensitive Detection

scholarly journals Detection of xanthine in food samples with an electrochemical biosensor based on PEDOT:PSS and functionalized gold nanoparticles

RSC Advances ◽  
2020 ◽  
Vol 10 (59) ◽  
pp. 36147-36154
Author(s):  
M. Z. H. Khan ◽  
M. S. Ahommed ◽  
M. Daizy
Keyword(s):  
Gold Nanoparticles ◽  
Glassy Carbon ◽  
Electrochemical Biosensor ◽  
Food Samples ◽  
Sensitive Detection ◽  
Carbon Electrodes ◽  
Polystyrene Sulfonate ◽  
Host Matrix ◽  
Glassy Carbon Electrodes ◽  
Functionalized Gold Nanoparticles

An innovative biosensor with glassy carbon electrodes modified with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate nanocomposites as a host matrix with functionalized gold nanoparticles for the selective and sensitive detection of xanthine.

Sensitive detection of dopamine using a platinum microelectrode modified by reduced graphene oxide and gold nanoparticles

2019 ◽  
Vol 848 ◽  
pp. 113244 ◽  
Author(s):  
Xing Chen ◽  
Jing Chen ◽  
Hao Dong ◽  
Qiwen Yu ◽  
Shaomin Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Sensitive Detection ◽  
Reduced Graphene

Graphene oxide–gold nanoparticles hybrids-based surface plasmon resonance for sensitive detection of microRNA

2016 ◽  
Vol 77 ◽  
pp. 1001-1007 ◽  
Author(s):  
Qing Wang ◽  
Qing Li ◽  
Xiaohai Yang ◽  
Kemin Wang ◽  
Shasha Du ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Sensitive Detection

scholarly journals Hydrophobic Paper-Based SERS Sensor Using Gold Nanoparticles Arranged on Graphene Oxide Flakes

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5471 ◽  
Author(s):  
Dong-Jin Lee ◽  
Dae Yu Kim
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Limit Of Detection ◽  
Point Of Care ◽  
Hydrophobic Surface ◽  
Sers Substrate ◽  
High Porosity ◽  
Paper Substrate ◽  
Surface Enhanced Raman ◽  
Hydrophobic Paper

Paper-based surface-enhanced Raman scattering (SERS) sensors have garnered much attention in the past decade owing to their ubiquity, ease of fabrication, and environmentally friendly substrate. The main drawbacks of a paper substrate for a SERS sensor are its high porosity, inherent hygroscopic nature, and hydrophilic surface property, which reduce the sensitivity and reproducibility of the SERS sensor. Here, we propose a simple, quick, convenient, and economical method for hydrophilic to hydrophobic surface modification of paper, while enhancing its mechanical and moisture-resistant properties. The hydrophobic paper (h-paper) was obtained by spin-coating diluted polydimethylsiloxane (PDMS) solution onto the filter paper, resulting in h-paper with an increased contact angle of up to ≈130°. To complete the h-paper-based SERS substrate, gold nanoparticles arranged on graphene oxide (AuNPs@GO) were synthesized using UV photoreduction, followed by drop-casting of AuNPs@GO solution on the h-paper substrate. The enhancement of the SERS signal was then assessed by attaching a rhodamine 6G (R6G) molecule as a Raman probe material to the h-paper-based SERS substrate. The limit of detection was 10 nM with an R2 of 0.966. The presented SERS sensor was also tested to detect a thiram at the micromolar level. We expect that our proposed AuNPs@GO/h-paper-based SERS sensor could be applied to point-of-care diagnostics applications in daily life and in spacecraft.

Synergic effect of plasmonic gold nanoparticles and graphene oxide on the performance of glucose sensing

2019 ◽  
Vol 43 (47) ◽  
pp. 18925-18934 ◽  
Author(s):  
Sadia Tabassum ◽  
Saira Naz ◽  
Amjad Nisar ◽  
Hongyu Sun ◽  
Shafqat Karim ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Blood Serum ◽  
Human Blood ◽  
Food Samples ◽  
Glucose Sensing ◽  
Glucose Biosensor ◽  
Synergic Effect ◽  
Hybrid Nanostructure ◽  
Highly Sensitive

A highly sensitive Au–GO hybrid nanostructure based non-enzymatic glucose biosensor is fabricated and exhibits superior sensitivity of 84.53 μA mM−1 cm−2. The biosensor also has applications for the detection of glucose in human blood serum, food samples and drinks.

A SERS substrate of mesoporous g-C3N4 embedded with in situ grown gold nanoparticles for sensitive detection of 6-thioguanine

2018 ◽  
Vol 260 ◽  
pp. 400-407 ◽  
Author(s):  
Ya-Ning Wang ◽  
Ying Zhang ◽  
Wen-Shu Zhang ◽  
Zhang-Run Xu
Keyword(s):  
Gold Nanoparticles ◽  
Sensitive Detection ◽  
Sers Substrate

In situ synthesis of gold nanoparticles on pseudo-paper films as flexible SERS substrate for sensitive detection of surface organic residues

Talanta ◽  
2019 ◽  
Vol 197 ◽  
pp. 225-233 ◽  
Author(s):  
Wen Luo ◽  
Miao Chen ◽  
Naiying Hao ◽  
Xueqian Huang ◽  
Xinyi Zhao ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
In Situ Synthesis ◽  
Sensitive Detection ◽  
Sers Substrate ◽  
Organic Residues
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