scholarly journals DNA/RNA Detection Using DNA-Templated Few-Atom Silver Nanoclusters

Biosensors ◽  
2013 ◽  
Vol 3 (2) ◽  
pp. 185-200 ◽  
Author(s):  
Judy Obliosca ◽  
Cong Liu ◽  
Robert Batson ◽  
Mark Babin ◽  
James Werner ◽  
...  
Keyword(s):  
Silver Nanoclusters ◽  
Rna Detection

A label-free kissing complex-induced fluorescence sensor for DNA and RNA detection by using DNA-templated silver nanoclusters as a signal transducer

RSC Advances ◽  
2016 ◽  
Vol 6 (101) ◽  
pp. 99269-99273 ◽  
Author(s):  
Kai Zhang ◽  
Ke Wang ◽  
Xue Zhu ◽  
Minhao Xie ◽  
Fei Xu
Keyword(s):  
Fluorescence Sensor ◽  
Silver Nanoclusters ◽  
Signal Transducer ◽  
Label Free ◽  
Rna Detection ◽  
Dna And Rna ◽  
New Strategy ◽  
Kissing Complex

A new strategy integrate silver nanoclusters (AgNCs) and riboswitches for the expanding of the application of a kissing complexes-induced sensor (KCIS) for the assay of DNA and RNA was reported.

Sequential Injection Analysis of Fe(II) in Supplement Samples Using Silver Nanoclusters as Optical Sensor

2016 ◽  
Vol 12 (6) ◽  
pp. 612-619
Author(s):  
Dittapong Pairoh ◽  
Kanokwan Chaiendoo ◽  
Wittaya Ngeontae ◽  
Rodjana Burakham
Keyword(s):  
Optical Sensor ◽  
Silver Nanoclusters ◽  
Sequential Injection Analysis ◽  
Sequential Injection

scholarly journals Innentitelbild: Core Modulation of 70‐Nuclei Core‐Shell Silver Nanoclusters (Angew. Chem. 19/2019)

2019 ◽  
Vol 131 (19) ◽  
pp. 6168-6168
Author(s):  
Jia‐Wei Liu ◽  
Zhi Wang ◽  
Yu‐Ming Chai ◽  
Mohamedally Kurmoo ◽  
Quan‐Qin Zhao ◽  
...  
Keyword(s):  
Silver Nanoclusters ◽  
Core Shell

Emergence of intense near-infrared photoluminescence by photoactivation of silver nanoclusters

2021 ◽  
Author(s):  
Wataru Ishii ◽  
Shohei Katao ◽  
Yoshiko Nishikawa ◽  
Yasuo Okajima ◽  
Atsuya Hatori ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Near Infrared ◽  
Silver Nanoclusters ◽  
Pyridine Solution

Photoirradiation to a pyridine solution of Ag29 nanoclusters (NCs) with red photoluminescence (PL) at 680 nm activated intense PL in the near infrared (NIR) region, giving a PL quantum yield...

scholarly journals Seroprevalence of Anti-SARS-CoV-2 IgG and IgM among Adults over 65 Years Old in the South of Italy

Diagnostics ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 483
Author(s):  
Immacolata Polvere ◽  
Alfredina Parrella ◽  
Giovanna Casamassa ◽  
Silvia D’Andrea ◽  
Annamaria Tizzano ◽  
...  
Keyword(s):  
Antibody Response ◽  
Immunoglobulin M ◽  
Molecular Testing ◽  
Elisa Assay ◽  
The South ◽  
Serum Samples ◽  
Serological Screening ◽  
Rna Detection ◽  
In Vitro Diagnostic

SARS-CoV-2 is a zoonotic betacoronavirus associated with worldwide transmission of COVID-19 disease. By the beginning of March, WHO reported about 113,820,000 confirmed cases including more than 2,527,000 deaths all over the world. However, the true extent of virus circulation or its real infection/fatality ratio is not well-estimated due to the huge portion of asymptomatic infections. In this observational study, we have estimated the prevalence of specific immunoglobulin M and G directed towards SARS-CoV-2 antigen in a cohort of 1383 adult volunteers aged over 65 years old, living in the district of Benevento, in the South of Italy. Serological screening was carried out on capillary blood in September 2020, seven months after pandemic outbreak in Italy, to evaluate virus circulation and antibody response among elderly adults, in which severe symptoms due to viral infection are more common. The overall seroprevalence of anti-SARS-CoV-2 antibodies was 4.70% (CI 3.70%–5.95%) with no statistically significant differences between sexes. Among these, 69.69% (CI 55.61%–77.80%) tested positive to IgM, 23.08% (CI 14.51%–34.64%) to IgG and 9.23% (CI 4.30%–18.71%) was positive for both. All patients that were positive to IgM underwent molecular testing through RT-qPCR on oral-rhino pharyngeal swabs and only one specimen was positive for SARS-CoV-2 RNA detection. Instead, the presence of IgG from screened volunteers was confirmed by re-testing serum samples using both an ELISA assay validated for in vitro diagnostic use (IVD) and a recently published synthetic peptide-based ELISA assay. In conclusion, our report suggests that (1) early restrictions were successful in limiting COVID-19 diffusion in the district of Benevento; (2) rapid serological analysis is an ideal testing for both determining real seroprevalence and massive screening, whereas detection of viral RNA remains a gold standard for identification of infected patients; (3) even among people without COVID-19 related symptoms, the antibody response against SARS-CoV-2 antigens has individual features.

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