Jump to Main Content
PubAg
Main content area
Search
« Previous |
1 - 20 of 2,400
|
Next »
Search Results
- Author:
- Morais, Stephanie L.; Barros, Piedade; Santos, Marlene; Delerue-Matos, Cristina; Gomes, Andreia C.; Fátima Barroso, M.
- Source:
- Talanta 2021 v.222 pp. 121416
- ISSN:
- 0039-9140
- Subject:
- fluorescein, etc ; Alexandrium minutum; DNA; DNA probes; databases; electrochemistry; electrodes; genes; gold; nucleic acid hybridization; toxicity; Atlantic Ocean; Show all 12 Subjects
- Abstract:
- ... This work addresses the development of a disposable electrochemical genosensor for the detection of the toxic dinoflagellate, Alexandrium minutum. Analyzing public databases, a specific 70 bp DNA probe, targeting A. minutum, was selected and designed. The genosensor methodology implied the immobilization of a A. minutum-specific DNA-capture probe onto screen-printed gold electrodes (SPGE). To impr ...
- DOI:
- 10.1016/j.talanta.2020.121416
-
https://dx.doi.org/10.1016/j.talanta.2020.121416
- Author:
- Leal, Vanderli Garcia; Batista, Alex Domingues; Petruci, João Flávio da Silveira
- Source:
- Talanta 2021 v.222 pp. 121558
- ISSN:
- 0039-9140
- Subject:
- fluorescein, etc ; absorbance; acetates; chemical reactions; digital images; diodes; fluorescence; hydrogen sulfide; mercury; mobile telephones; monitoring; phosphoric acid; pumps; reflectance; river water; tap water; three-dimensional printing; toxicity; vapors; wastewater; Show all 20 Subjects
- Abstract:
- ... The determination of sulfide anion in a variety of waters (e.g. wastewaters and natural waters) even at low concentration (i.e. in the μM range) is essential due to its high toxicity, corrosivity and unpleasant smelling proprieties. Despite several methodologies are dedicated to aqueous sulfide determination, most of them need sampling/transport steps – which is no adequate to sulfide due to its r ...
- DOI:
- 10.1016/j.talanta.2020.121558
-
https://dx.doi.org/10.1016/j.talanta.2020.121558
- Author:
- Guo, Wenfei; Gao, Xiaonan; Zhan, Renhui; Zhao, Zengteng; Xu, Kehua; Tang, Bo
- Source:
- Talanta 2021 v.222 pp. 121525
- ISSN:
- 0039-9140
- Subject:
- fluorescein, etc ; biomarkers; chemical bonding; confocal laser scanning microscopy; energy transfer; fluorescence; gelatinase A; gelatinase B; gold; image analysis; inflammation; isothiocyanates; lipopolysaccharides; matrilysin; migratory behavior; nanogold; neoplasm cells; peptides; selenium; Show all 19 Subjects
- Abstract:
- ... The expression levels of matrix metalloproteinases (MMPs) are closely related to the degree of inflammation which facilitates tumor cells' invasion and migration. A tricolor fluorescence nanoprobe based on high-fidelity gold-selenium (Au–Se) nanoplatform was designed and constructed for simultaneously imaging matrix metalloproteinase-2 (MMP-2), matrix metalloproteinase-7 (MMP-7) and matrix metallo ...
- DOI:
- 10.1016/j.talanta.2020.121525
-
https://dx.doi.org/10.1016/j.talanta.2020.121525
- Author:
- Zhao, Qiang; Bai, Yunlong; Wang, Hailin
- Source:
- Talanta 2020 v.217 pp. 121018
- ISSN:
- 0039-9140
- Subject:
- fluorescein, etc ; anisotropy; dissociation; fluorescence; immunoglobulin E; oligonucleotides; Show all 6 Subjects
- Abstract:
- ... Mapping aptamer-protein interactions is important for characterization and applications of aptamers against proteins. We describe here probing affinity interactions between aptamer and immunoglobulin E (IgE) with a fluorescence anisotropy (FA) approach using a series of aptamer probes having single fluorescein (FAM) label at individual nucleotide (A, C, T). Studies of binding between IgE and aptam ...
- DOI:
- 10.1016/j.talanta.2020.121018
-
https://dx.doi.org/10.1016/j.talanta.2020.121018
- Author:
- Feng, Shumin; Gong, Shengyi; Feng, Guoqiang
- Source:
- Chemical communications 2020 v.56 no.16 pp. 2511-2513
- ISSN:
- 1364-548X
- Subject:
- fluorescein, etc ; chemical compounds; chemical reactions; fluorescence; Show all 4 Subjects
- Abstract:
- ... We report herein for the first time that the aggregation-induced emission and strong solid fluorescence of fluorescein derivatives can be realized by slightly modifying their structure, which provides a new option for AIEgens and solid fluorescent materials. ...
- DOI:
- 10.1039/c9cc09784h
-
http://dx.doi.org/10.1039/c9cc09784h
- Author:
- Cabrera, Ricardo; Gabriel, Manuela; Estrada, Laura C.; Etchenique, Roberto
- Source:
- Analytical chemistry 2019 v.91 no.9 pp. 5968-5972
- ISSN:
- 1520-6882
- Subject:
- fluorescein, etc ; microscopy; photolysis; serotonin; Show all 4 Subjects
- Abstract:
- ... We present a simple and fast methodology for measuring the two-photon (2P) action cross section of phototriggers. The method uses a standard 2P microscopy setup for both uncaging and detection and a set of lithographically made microcuvettes in order to reduce the total excitation volume and, thus, the photolysis time. The procedure does not need a standard and can be used for any caged compounds ...
- DOI:
- 10.1021/acs.analchem.9b00392
-
http://dx.doi.org/10.1021/acs.analchem.9b00392
- Author:
- Gilbert, Eliza I.; Durst, Scott L.; Diver, Tracy A.; Mello, Hannah; Bertrand, Nick G.; Franssen, Nathan R.
- Source:
- Fisheries management and ecology 2020 v.27 no.3 pp. 258-269
- ISSN:
- 0969-997X
- Subject:
- fluorescein, etc ; Ptychocheilus lucius; animal growth; endangered species; fish; probability; Show all 6 Subjects
- Abstract:
- ... Distinguishing hatchery‐reared fishes from wild conspecifics can be required to quantify the success of augmentation programmes. This study estimated the probability of identifying calcein‐marked, hatchery‐reared Colorado pikeminnow Ptychocheilus lucius Girard from external and internal structures. Both control and marked fish held in the laboratory were correctly identified 80% of the time after ...
- DOI:
- 10.1111/fme.12408
-
http://dx.doi.org/10.1111/fme.12408
- Author:
- Ward, Cassandra L.; Linz, Thomas H.
- Source:
- Electrophoresis 2020 v.41 no.9 pp. 691-696
- ISSN:
- 0173-0835
- Subject:
- fluorescein, etc ; chemical species; detection limit; electrophoresis; gels; liquids; polymers; temperature; Show all 8 Subjects
- Abstract:
- ... Thermally reversible Pluronic gels have been employed as separation matrices in microfluidic devices in the analysis of biological macromolecules. The phase of these gels can be tuned between liquid and solid states using temperature to vary fluidic resistance and alter peak resolution. Although separations in thermal gels have been characterized, their effect on isotachophoresis has not. This stu ...
- DOI:
- 10.1002/elps.201900407
-
http://dx.doi.org/10.1002/elps.201900407
- Author:
- Petri, László; Szijj, Péter A.; Kelemen, Ádám; Imre, Tímea; Gömöry, Ágnes; Lee, Maximillian T. W.; Hegedűs, Krisztina; Ábrányi-Balogh, Péter; Chudasama, Vijay; Keserű, György Miklós
- Source:
- RSC advances 2020 v.10 no.25 pp. 14928-14936
- ISSN:
- 2046-2069
- Subject:
- fluorescein, etc ; antibodies; benzyl isothiocyanate; cysteine; diagnostic techniques; disulfide bonds; pH; Show all 7 Subjects
- Abstract:
- ... Protein labelling has a wide variety of applications in medicinal chemistry and chemical biology. In addition to covalent inhibition, specific labelling of biomolecules with fluorescent dyes is important in both target discovery, validation and diagnostics. Our research was conducted through the fragment-based development of a new benzyl-isothiocyanate-activated fluorescent dye based on the fluore ...
- DOI:
- 10.1039/d0ra02934c
-
http://dx.doi.org/10.1039/d0ra02934c
- Author:
- Chi, Weijie; Chen, Jie; Liu, Wenjuan; Wang, Chao; Qi, Qingkai; Qiao, Qinglong; Tan, Tee Meng; Xiong, Kangming; Liu, Xiao; Kang, Keegan; Chang, Young-Tae; Xu, Zhaochao; Liu, Xiaogang
- Source:
- Journal of the American Chemical Society 2020 v.142 no.14 pp. 6777-6785
- ISSN:
- 1520-5126
- Subject:
- fluorescein, etc ; bioimaging; biosensors; electron transfer; luminescence; prediction; rhodamines; Show all 7 Subjects
- Abstract:
- ... Photoinduced electron transfer (PET) is one of the most important mechanisms for developing fluorescent probes and biosensors. Quantitative prediction of the quantum yields of these probes and sensors is crucial to accelerate the rational development of novel PET-based functional materials. Herein, we developed a general descriptor (ΔE) for predicting the quantum yield of PET probes, with a thresh ...
- DOI:
- 10.1021/jacs.0c01473
-
http://dx.doi.org/10.1021/jacs.0c01473
- Author:
- Haishuang Jia,; Liu, Wenfang; Li, Na; Wang, Jun; Song, Youtao
- Source:
- Journal of analytical chemistry 2020 v.75 no.3 pp. 330-342
- ISSN:
- 1061-9348
- Subject:
- fluorescein diacetate, etc ; cell membranes; copper; detection limit; hydrazones; lipids; medicine; Show all 7 Subjects
- Abstract:
- ... Two novel methods for spectrophotometric determination of Cu²⁺ ion using synthesized and characterized furfuraldehyde fluorescein diacetate hydrazone (FFDH) and furfuraldehyde fluorescein hydrazone (FFH) have been proposed. Addition of Cu²⁺ to FFDH and FFH solutions results in a rapid color change from colorless to dark yellow. Experimental results show that FFH and FFDH both can provide a rapid, ...
- DOI:
- 10.1134/S1061934820030089
-
http://dx.doi.org/10.1134/S1061934820030089
- Author:
- Knoblauch, Rachael; Ben Hamo, Hilla; Marks, Robert; Geddes, Chris D.
- Source:
- Journal of physical chemistry 2020 v.124 no.8 pp. 4723-4737
- ISSN:
- 1932-7455
- Subject:
- fluorescein, etc ; fluorescence; fluorescence emission spectroscopy; nanosilver; physical chemistry; Show all 5 Subjects
- Abstract:
- ... Metal-enhanced fluorescence (MEF) has become an increasingly important technology in recent years, with thorough research addressing the fundamentals of MEF. In many studies, spectral distortion is observed in the enhanced spectra as compared to free-space fluorescence emission profiles. Despite this observation, very little experimentation has hitherto been undertaken to investigate the mechanist ...
- DOI:
- 10.1021/acs.jpcc.9b11055
-
http://dx.doi.org/10.1021/acs.jpcc.9b11055
- Author:
- Kumar, Anjani; Padhy, Soumya Ranjan; Das, Rasmita Rani; Shahid, Mohammad; Dash, Pradeep Kumar; Senapati, Ansuman; Panneerselvam, P.; Kumar, Upendra; Chatterjee, Dibyendu; Adak, Totan; Tripathi, Rahul; Nayak, P.K.; Nayak, A.K.
- Source:
- Agriculture, ecosystems & environment 2021 v.308 pp. 107268
- ISSN:
- 0167-8809
- Subject:
- fluorescein diacetate, etc ; agriculture; carbon dioxide; carbon dioxide enrichment; denitrifying microorganisms; dynamics; ecosystems; environment; field experimentation; least squares; microbial activity; mineralization; models; nitrogen; nitrous oxide; nitrous oxide production; path analysis; population; prediction; rice; rice soils; soil microorganisms; urease; vegetative growth; water stress; Show all 25 Subjects
- Abstract:
- ... Understanding the effect of elevated atmospheric CO₂ on nitrous oxide (N₂O) emission and plant-microbe interactions in rice soils is of great significance for predicting the long-term response of rice ecosystems to elevated CO₂ concentration. Elevated atmospheric CO₂ concentration has the potential to augment rice production and alter the soil nitrogen (N) dynamics. Because N₂O emission is control ...
- DOI:
- 10.1016/j.agee.2020.107268
-
https://dx.doi.org/10.1016/j.agee.2020.107268
- Author:
- Karakuş, Erman; Sayar, Melike; Dartar, Suay; Kaya, Beraat Umur; Emrullahoğlu, Mustafa
- Source:
- Chemical communications 2019 v.55 no.34 pp. 4937-4940
- ISSN:
- 1364-548X
- Subject:
- fluorescein, etc ; chemical reactions; cysteine; fluorescence; Show all 4 Subjects
- Abstract:
- ... A fluorescent probe decorated with an alkynyl ester unit (e.g. propiolate) displayed a selective turn-on type fluorescent response towards cysteine. Following a sequential addition–cyclisation pathway mediated by the addition of cysteine, the pre-fluorescent dye rapidly transformed into a new structure and induced a fluorescent response clearly observable with the naked eye. ...
- DOI:
- 10.1039/c9cc01774g
-
http://dx.doi.org/10.1039/c9cc01774g
- Author:
- Reid, Michael S.; Karlsson, Maria; Abitbol, Tiffany
- Source:
- Carbohydrate polymers 2020 v.250 pp. 116943
- ISSN:
- 0144-8617
- Subject:
- fluorescein, etc ; cellulose; cellulose nanofibers; cold; fluorescence; food contact surfaces; homogenization; leaching; paper; pulp; water; Show all 11 Subjects
- Abstract:
- ... Fluorescently labeled cellulose nanofibrils (CNFs) were used to evaluate CNF leaching from paper according to standard safety assays for food contact materials. Enzymatically pretreated pulp was first labeled with 5-([4,6-Dichlorotriazin-2-yl]amino)fluorescein hydrochloride (DTAF), followed by homogenization to produce fluorescent CNFs of varying degrees of fibrillation. Labeling at the μmolar DTA ...
- DOI:
- 10.1016/j.carbpol.2020.116943
-
https://dx.doi.org/10.1016/j.carbpol.2020.116943
- Author:
- Liu, Shi Gang; Zhang, Dong; He, Yu; Gao, Wenli; Shi, Xingbo
- Source:
- Biosensors & bioelectronics 2020 v.166 pp. 112461
- ISSN:
- 0956-5663
- Subject:
- fluorescein, etc ; RNA; aptasensors; detection limit; fluorescence; isothiocyanates; oligonucleotides; photobleaching; streptavidin; theophylline; Show all 10 Subjects
- Abstract:
- ... A new split aptamer sensing platform is developed for highly sensitive and selective detection of theophylline based on single molecule photobleaching (SMPB) technique. The sensing system contains two probes. One is formed by one streptavidin and four biotinylated RNA fragments labelled with fluorescein isothiocyanate (FITC). Each biotinylated RNA fragment contains two repeating aptamer fragments. ...
- DOI:
- 10.1016/j.bios.2020.112461
-
https://dx.doi.org/10.1016/j.bios.2020.112461
- Author:
- Shi, Pan; Zhang, Yanan; Lv, Pei; Fang, Wei; Ling, Shenglong; Guo, Xiaoqi; Li, Dong; Liu, Sanling; Sun, Demeng; Zhang, Longhua; Liu, Dongsheng; Zheng, Ji-Shen; Tian, Changlin
- Source:
- Chemical communications 2020 v.56 no.51 pp. 6941-6944
- ISSN:
- 1364-548X
- Subject:
- fluorescein, etc ; G-protein coupled receptors; G-proteins; chemical compounds; chemical reactions; energy transfer; fluorescence; signal transduction; Show all 8 Subjects
- Abstract:
- ... The dynamics of GPCRs (G protein-coupled receptors) coupling for cognate G proteins play a critical role in signal transduction. Herein, we reported a site-specifically labelled small-sized fluorescent pair 7-HC/FlAsH ((7-hydroxycoumarin-4-yl)-ethylglycine/fluorescein arsenical hairpin) for fluorescence lifetime based FRET (fluorescence resonance energy transfer) to reveal conformational differenc ...
- DOI:
- 10.1039/d0cc02691c
-
http://dx.doi.org/10.1039/d0cc02691c
- Author:
- Wei, Zixuan; Yi, Danyang; Hu, Xuemei; Sun, Chaoqun; Long, Yijuan; Zheng, Huzhi
- Source:
- Colloids and surfaces 2020 v.595 pp. 124698
- ISSN:
- 0927-7757
- Subject:
- fluorescein, etc ; absorbance; aqueous solutions; catalytic activity; cationic surfactants; electrostatic interactions; enzymes; fluorescence; lighting; micelles; oxidation; Show all 11 Subjects
- Abstract:
- ... As the critical micelle concentration (CMC) is one of the essential parameters of surfactant, the determination of CMC value is of great significance. We explored a facile and novel strategy based on the visible-light-induced oxidase-like activity of fluorescein for determining the CMC value of cationic surfactants. Fluorescein as a visible-light-induced oxidase mimic can catalyze the change of 3, ...
- DOI:
- 10.1016/j.colsurfa.2020.124698
-
https://dx.doi.org/10.1016/j.colsurfa.2020.124698
- Author:
- Salinas, Carina; Amé, María Valeria; Bracamonte, A. Guillermo
- Source:
- RSC advances 2020 v.10 no.35 pp. 20620-20637
- ISSN:
- 2046-2069
- Subject:
- fluorescein, etc ; Cyanobacteria; emissions; energy transfer; fluorescence; fluorescence microscopy; nanoparticles; rhodamines; silica; transmission electron microscopy; Show all 10 Subjects
- Abstract:
- ... Fluorescent silica nanoparticles (NPs–(SiO₂–Fluo)) were synthesized based on the classical Störber method for cyanobacteria labelling. Modified mono-coloured SiO₂ NPs with fluorescein (Fl) and rhodamine B (RhB) were obtained (NPs–(SiO₂–Fl) and NPs–(SiO₂–RhB)). Moreover, multi-coloured SiO₂ NPs, via the incorporation of both emitters (NPs–(SiO₂–RhB–Fl)), were tuned for optimal emissions and the bio ...
- DOI:
- 10.1039/d0ra02939d
-
http://dx.doi.org/10.1039/d0ra02939d
- Author:
- Liu, Yansheng; Feng, Huayu; Luo, Feng
- Source:
- Carbon 2020 v.161 pp. 153-161
- ISSN:
- 0008-6223
- Subject:
- fluorescein, etc ; Raman spectroscopy; gold; graphene; nanocrystallites; nanogold; nanoparticles; quantitative analysis; vapors; Show all 9 Subjects
- Abstract:
- ... In this paper, a study of quantitative analysis of the defects in chemical vapor deposition (CVD) grown graphene through plasmon-enhanced Raman scattering has been performed. By designing and fabricating three-dimensional hybrid Au nano-particles/single-layer-graphene/Au nano-holes (Au NPs/SLG/Au NHs) structures, the defects induced Raman scattering signals of SLG have been extremely enhanced. The ...
- DOI:
- 10.1016/j.carbon.2020.01.063
-
https://dx.doi.org/10.1016/j.carbon.2020.01.063