G-quadruplex DNAzyme as peroxidase mimetic in a colorimetric biosensor for ultrasensitive and selective detection of trace tetracyclines in foods

Colorimetric determination of tetracyclines based on aptamer-mediated dual regulation of gold nanoparticle aggregation and in situ silver metallization

“…The LODs were as follows: 60 nmol L −1 for the enzyme probe, 37 200 nmol L −1 for the d -Trp–OMe@AuNCs probe, 3 and 3.1 nmol L −1 for the DNAzyme probe. 38 Obviously, the present scheme has more advantages in terms of sensitivity and simpler operation. In parallel, this analysis method is more time-saving and only needs 5 minutes (Table S2†).…”

A fluorescent and scattering dual-mode probe based on a carbon dot@cerium–guanosine monophosphate coordination polymer network for tetracycline detection

“…The response to chlortetracycline and oxytetracycline implied that the proposed sensor can be used to detect tetracycline antibiotics, which is similar with that of most reported TC sensors. 15,16 The results suggested that the CD@GMP-Ce probe can detect TC selectively (Fig. 5).…”

“…[8][9][10][11][12] However, these methods need expensive and bulky instruments, long detection time, and professional operators, though they possess the merits of high accuracy and reliability. In recent years, thanks to the advantages of an easy operation and rapid detection, many chemical and biological sensors of TC have been constructed based on various signal read-out techniques, such as electrochemistry, 13 surface plasmon resonance (SPR), 14 uorescence, 15 ultraviolet-visible (UV-vis) absorption, 16 and surface-enhanced Raman scattering (SERS) 17 . 18,19 These sensors provide alternative routes for the detection of TC.…”

The Inhibitory Activity of Natural Products to Xanthine Oxidase

“…Natural products are valuable biological resources with wide applications. [97][98][99][100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116] These natural products of extracted mixture or monomer showed good biological activity in the screening of anti-gout activity in vitro, which has the value for further research of gout treatment. In this review, studies on anti-gout activities were mainly summarized from the aspects of active components and monomers of natural products.…”