Fluorescence-switching RNA for detection of bacterial ribosomes

2017 ◽  
Vol 53 (68) ◽  
pp. 9406-9409
Author(s):  
Lihao Guo ◽  
Akimitsu Okamoto
Keyword(s):  
Bacterial Population ◽  
Fluorescence Emission ◽  
Turn On ◽  
Fluorescence Switching

The fluorescence emission specific to bacterial ribosomes from a turn-on-type fluorescent RNA enabled quantification of bacterial population.

Detection and Inhibition of Refractory Steel Corrosion by Rhodamine-Based Compound

2013 ◽  
Vol 864-867 ◽  
pp. 672-676
Author(s):  
Li Zhang ◽  
Da Quan Zhang ◽  
Yu Meng ◽  
Li Xin Gao
Keyword(s):  
Corrosion Potential ◽  
Fluorescence Emission ◽  
Steel Corrosion ◽  
Nacl Solution ◽  
Fluorescent Compound ◽  
Inhibition Effect ◽  
Refractory Steel ◽  
Turn On ◽  
Corrosion Reaction ◽  
And Shifts

A rhodamine-based fluorescent compound, spiro[1H-isoindole-1,9′-[9H]xanthen] -3(2H)-one, ′,6′-bis(diethylamino)-2-[(1-methylethylidene)-amino] (RB1), is developed to detect and inhibit the refractory steel corrosion in 3% NaCl solution. The inhibition effect was evaluated by electrochemical measurements. RB1 suppresses the cathodic corrosion reaction and shifts the corrosion potential toward more negative values. RB1 exhibits a turn-on fluorescence emission in the presence of Fe 3+ ions. The selectivity of RB1 over other commonly coexistent Cu2+, Fe 2+ and Mn2+ was investigated. The variation of the fluorescence intensity is correlated to that of weight-loss. RB1 has a potential application as corrosion inhibitor and corrosion indicator in some industry process.

scholarly journals A Turn-On Detection of DNA Sequences by Means of Fluorescence of DNA-Templated Silver Nanoclusters via Unique Interactions of a Hydrated Ionic Liquid

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2889 ◽  
Author(s):  
Ye Teng ◽  
Hisae Tateishi-Karimata ◽  
Takaaki Tsuruoka ◽  
Naoki Sugimoto
Keyword(s):  
Ionic Liquid ◽  
Dna Sequences ◽  
Fluorescence Emission ◽  
Silver Nanoclusters ◽  
Dihydrogen Phosphate ◽  
Target Sequence ◽  
Aqueous Buffer ◽  
Turn On ◽  
Sensitivity And Selectivity ◽  
Ag Ncs

Nucleic acid stability and structure, which are crucial to the properties of fluorescent DNA-templated silver nanoclusters (DNA-Ag NCs), significantly change in ionic liquids. In this work, our purpose was to study DNA-Ag NCs in a buffer containing the hydrated ionic liquid of choline dihydrogen phosphate (choline dhp) to improve fluorescence for application in DNA detection. Due to the stabilisation of an i-motif structure by the choline cation, a unique fluorescence emission—that was not seen in an aqueous buffer—was observed in choline dhp and remained stable for more than 30 days. A DNA-Ag NCs probe was designed to have greater fluorescence intensity in choline dhp in the presence of a target DNA. A turn-on sensing platform in choline dhp was built for the detection of the BRCA1 gene, which is related to familial breast and ovarian cancers. This platform showed better sensitivity and selectivity in distinguishing a target sequence from a mutant sequence in choline dhp than in the aqueous buffer. Our study provides new evidence regarding the effects of structure on properties of fluorescent DNA-Ag NCs and expands the applications of fluorescent DNA-Ag NCs in an ionic liquid because of improved sensitivity and selectivity.

scholarly journals A rhodamine-based dual chemosensor for the naked-eye detection of Hg2+ and enhancement of the fluorescence emission for Fe3+

2020 ◽  
Vol 19 (12) ◽  
pp. 1690-1696
Author(s):  
Jian-Peng Hu ◽  
Hao-Hang Yang ◽  
Qi Lin ◽  
Hong Yao ◽  
You-Ming Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Fluorescence Emission ◽  
Eye Detection ◽  
Naked Eye ◽  
Rhodamine Derivative ◽  
Turn On ◽  
Trimesoyl Chloride ◽  
Naked Eye Detection

Herein, we synthesized a trimesoyl chloride–rhodamine derivative TR. TR exhibited metal ions complexation induced photophysical ‘turn-on’ signaling responses to Hg2+ and Fe3+.

Antibiotic-triggered reversible luminescence switching in amine-grafted mixed-linker MOF: exceptional turn-on and ultrafast nanomolar detection of sulfadiazine and adenosine monophosphate with molecular keypad lock functionality

2019 ◽  
Vol 7 (33) ◽  
pp. 19471-19484 ◽  
Author(s):  
Ranadip Goswami ◽  
Shyama Charan Mandal ◽  
Nilanjan Seal ◽  
Biswarup Pathak ◽  
Subhadip Neogi
Keyword(s):  
Adenosine Monophosphate ◽  
Turn On ◽  
Nanomolar Detection ◽  
Fluorescence Switching

Mixed-linker CSMCRI-2 demonstrates the turn-on and nanomolar detection of antibiotics and biophosphates with antibiotic-triggered reversible fluorescence switching and keypad lock function.

A Novel Fluorescent Nanoswitch Based on Carbon Dots for Sensitive Detection of Hg2+ and I−

NANO ◽  
2017 ◽  
Vol 12 (02) ◽  
pp. 1750024 ◽  
Author(s):  
Xiqing Liu ◽  
Xiao Wei ◽  
Yeqing Xu ◽  
Hongji Li ◽  
Kai Lu ◽  
...  
Keyword(s):  
Linear Relationship ◽  
Fluorescence Intensity ◽  
Carbon Dots ◽  
Limit Of Detection ◽  
Hydrothermal Process ◽  
Fluorescence Emission ◽  
Selective Determination ◽  
Fluorescence Switching ◽  
Interfering Ions

In this paper, a novel fluorescent nanoswitch based on carbon dots (CDs) was developed for the sensitive and selective determination of Hg[Formula: see text] and I[Formula: see text]. The CDs were obtained by simple hydrothermal process and had a strong fluorescence emission at 440[Formula: see text]nm. The fluorescence of the CDs can be selectively quenched by Hg[Formula: see text] ion, and then the I[Formula: see text] was added into the system, which can interact with Hg[Formula: see text] and recover fluorescence of the CDs. Under optimal conditions, the quenching fluorescence intensity on addition of Hg[Formula: see text] has obtained a satisfactory linear relationship covering the linear range of 0–50[Formula: see text][Formula: see text]M with the linear relationship ([Formula: see text]), and the limit of detection is 0.047[Formula: see text][Formula: see text]M. The additions of I[Formula: see text] could lead to the fluorescence intensity of the solution of CDs and Hg[Formula: see text] (50[Formula: see text][Formula: see text]M) recover rapidly, which is linearly related ([Formula: see text]) to the concentration of I[Formula: see text] in the range from 0 to 70[Formula: see text][Formula: see text]M, the detection limit for I[Formula: see text] was calculated to be 0.084[Formula: see text][Formula: see text]M. Moreover, the developed method to detect Hg[Formula: see text] and I[Formula: see text] was evaluated in real examples, and the fluorescence switching can sensitively and selectively detect Hg[Formula: see text] and I[Formula: see text] over some potentially interfering ions, the recoveries were up to 97.8–107.0% and 96.7–106.6%, respectively.

A naphthalimide-based novel “Turn-On” fluorescence approach for the determination of uric acid and monitoring of xanthine oxidase activity

2019 ◽  
Vol 11 (32) ◽  
pp. 4190-4196 ◽  
Author(s):  
Jagpreet Singh Sidhu ◽  
Shilpa Sharma ◽  
Ashutosh Singh ◽  
Neha Garg ◽  
Navneet Kaur ◽  
...  
Keyword(s):  
Uric Acid ◽  
Xanthine Oxidase ◽  
Oxidase Activity ◽  
Fluorescence Emission ◽  
Turn On ◽  
Xanthine Oxidase Activity

Fluorescence emission of the receptor enhanced upon its binding with uric acid due to the cancellation of the PET phenomenon.

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