Results 271 to 280 of about 6,973,238 (322)

Nucleic acid-based electrochemical biosensor: Recent advances in probe immobilization and signal amplification strategies.

Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology, 2021
With the increasing importance of accurate and early disease diagnosis and the development of personalized medicine, DNA-based electrochemical biosensor has attracted broad scientific and clinical interests in the past decades due to its unique ...
Krishna Thapa, Wenyan Liu, Ri-sheng Wang
semanticscholar   +1 more source

Imaging sensor array coupled with dual-signal amplification strategy for ultrasensitive chemiluminescence immunoassay of multiple mycotoxins.

Biosensors & bioelectronics, 2021
A novel chemiluminescence (CL) immunosensor array in combination with a dual-signal amplification strategy was developed for rapid and ultrasensitive detection of multiple mycotoxins in herbal medicine.
C. Zong, Fan Jiang, Xiaoyu Wang, Ping Li, Linru Xu, Hua Yang   +5 more
semanticscholar   +1 more source

Recent trends in nanomaterial-based signal amplification in electrochemical aptasensors

Critical Reviews in Biotechnology, 2021
Ultrasensitive biosensors have become a necessity in the world of scientific research, and several signal enhancement strategies have been employed to attain exceptionally low detection limits. Nanotechnology turns out to be a strong contender for signal
C. Kurup, N. F. Mohd-Naim, M. Ahmed
semanticscholar   +1 more source

Aptamer amplification: divide and signal

Expert Opinion on Medical Diagnostics, 2008
Aptamers are selected nucleic acids that bind their targets with affinities and specificities that are often comparable to those of monoclonal antibodies.Although aptamers have been adapted to a wide variety of assay formats, the fact that they are nucleic acids makes them uniquely useful for adaptation to amplification assays.
Supriya, Pai, Ana, Roberts, Andrew D, Ellington   +2 more
openaire   +2 more sources

Noiseless Independent Signal and Power Amplification

Technical Digest. 1998 EQEC. European Quantum Electronics Conference (Cat. No.98TH8326), 1998
We present a noiseless optical amplifier comprising a signal-amplifying feed-forward loop and a power-amplifying injection-locked laser. We demonstrate that the signal amplifier can attain a signal-transfer coefficient limited solely by the quantum efficiency of our in-loop photodetector and that we can independently amplify the optical power while ...
Huntington, EH, Lam, PK, Ralph, TC, McClelland, DE, Bachor, HA   +4 more
openaire   +3 more sources

Single-atom catalysts boost signal amplification for biosensing.

Chemical Society Reviews, 2020
Development of highly sensitive biosensors has received ever-increasing attention over the years. Due to the unique physicochemical properties, the functional nanomaterial-enabled signal amplification strategy has made some great breakthroughs in ...
Lei Jiao, Weiqing Xu, Yu Wu, Hongye Yan, Wenling Gu, Dan Du, Yuehe Lin, Chengzhou Zhu   +7 more
semanticscholar   +1 more source

Small signal SBS: amplification

SPIE Proceedings, 2007
The amplification of small signals was investigated both experimentally and theoretically. The theoretical analysis was provided in terms of unsaturated regime. It is shown, that it is necessary to take into account the temporal shapes of interacting waves. When pump pulse duration is of the order of hupersound phonons lifetime, the Stokes pulse has
I. M. Bel'dyugin, V. F. Efimkov, I. G. Zubarev, S. I. Mikhailov   +3 more
openaire   +1 more source

Signaling Amplification at the Immunological Synapse

2009
The immunological synapse is a dynamic structure, formed between a T cell and one or more antigen-presenting cells, characterized by lipid and protein segregation, signaling compartmentalization, and bidirectional information exchange through soluble and membrane-bound transmitters.
VIOLA, ANTONELLA, CONTENTO, RITA LUCIA, MOLON, BARBARA   +2 more
openaire   +2 more sources

Φ-OTDR signal amplification

SPIE Proceedings, 2015
Phase-sensitive optical time-domain reectometry (Φ-OTDR) seems to be the most appropriate solution for acoustic vibration along standard optical fiber detection. In general the sensing system measures phase changes of the received Rayleigh back-scattered signal in the fiber.
Petr Munster, Josef Vojtech, Petr Sysel, Radim Sifta, Vit Novotny, Tomas Horvath, Stanislav Sima, Miloslav Filka   +7 more
openaire   +1 more source

DNAzyme amplification of molecular beacon signal

Talanta, 2005
This paper reports an improved catalytic molecular beacon. Addition of the target oligonucleotide activates a DNA enzyme (DNAzyme), which, in turn, activates multiple copies of molecular beacons (MB) and gives rise to a strong fluorescence signal.
Ye, Tian, Chengde, Mao
openaire   +2 more sources