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Exibindo 1-30 of 41 resultados para "451088" no prazo de Papéis
Justin D Besant et al.
Nature communications, 6, 6978-6978 (2015-04-23)
Diagnosis of disease outside of sophisticated laboratories urgently requires low-cost, user-friendly devices. Disposable, instrument-free testing devices are used for home and physician office testing, but are limited in applicability to a small class of highly abundant analytes. Direct, unambiguous visual
Natalia Grytsyk et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 230, 118081-118081 (2020-01-31)
The combination of surface-enhanced resonance Raman spectroscopy (SERRS) and electrochemistry is an ideal tool to study the redox process of the heme proteins and is often performed on silver electrodes. In this manuscript, we present an approach using a microstructured
Dan Zhu et al.
Nanoscale, 7(44), 18671-18676 (2015-10-27)
Enzyme complexes are assembled at the two-dimensional lipid membrane or prearranged on three-dimensional scaffolding proteins to regulate their catalytic activity in cells. Inspired by nature, we have developed gold nanoparticle-based spherical DNAzymes (SNAzymes) with programmably engineered activities by exploiting poly-adenine
Ding Jiang et al.
The Analyst, 140(18), 6404-6411 (2015-08-08)
Silver nanoparticles (NPs) decorated nitrogen doped graphene (NG) nanocomposites were prepared through a one-step thermal-treatment route using arginine as the nitrogen source. By integrating the excellent electrical properties and large surface area of Ag NPs and NG, the obtained Ag/NG
Anita J Zaitouna et al.
Analytical chemistry, 87(13), 6966-6973 (2015-06-10)
We report the synthesis and application of three new antifouling diluents for the fabrication of an E-PB HIV sensor. Among the three thiolated antifouling diluents used in this study, the methoxy-terminated diluent (C6-MEG) is the most effective in alleviating both
Surface-enhanced Raman spectroscopic study of DNA and 6-mercapto-1-hexanol interactions using large area mapping.
Frohling KB, et al.
Vibrational Spectroscopy, 86, 331-336 (2016)
Shufeng Liu et al.
Chemistry, an Asian journal, 10(9), 1903-1908 (2015-07-16)
DNA three-way junctions (DNA 3WJ) have been widely used as important building blocks for the construction of DNA architectures and dynamic assemblies. Herein, we describe for the first time a catalytic hairpin assembly-programmed DNA three-way junction (CHA-3WJ) strategy for the
Baoting Dou et al.
The Analyst, 140(17), 5981-5986 (2015-07-17)
By coupling target DNA-induced reconfiguration of the dsDNA probes with enzyme-assisted target recycling amplification, we describe the development of a signal-on electrochemical sensing approach for sensitive detection of hereditary tyrosinemia type I gene. The dsDNA probes are self-assembled on the
Dhésmon Lima et al.
Bioelectrochemistry (Amsterdam, Netherlands), 133, 107447-107447 (2020-02-02)
Apolipoprotein E4 (ApoE4) has a key role on the onset and progression of Alzheimer's disease (AD), since it favours the deposition of toxic amyloid-beta (Aβ) aggregates in the brain. These effects might result from the interaction between ApoE4 and specific
Zhanxi Fan et al.
Nature communications, 6, 6571-6571 (2015-03-15)
Conventionally, the phase transformation of inorganic nanocrystals is realized under extreme conditions (for example, high temperature or high pressure). Here we report the complete phase transformation of Au square sheets (AuSSs) from hexagonal close-packed (hcp) to face-centered cubic (fcc) structures
Qing Zhou et al.
Lab on a chip, 15(23), 4467-4478 (2015-10-20)
Tissue injury triggers complex communication between cells via secreted signaling molecules such as cytokines and growth factors. Discerning when and where these signals begin and how they propagate over time is very challenging with existing cell culture and analysis tools.
Aptamer-based microcantilever array biosensor for detection of fumonisin B-1.
Chen X, et al.
Royal Society of Chemistry Advances, 5(45), 35448-35452 (2015)
A Microelectrode Array with Reproducible Performance Shows Loss of Consistency Following Functionalization with a Self-Assembled 6-Mercapto-1-hexanol Layer.
Corrigan D, et al.
Sensors, 18(6), 1891-1891 (2018)
Hui Wang et al.
Analytical chemistry, 86(15), 7368-7376 (2014-07-09)
Surface-enhanced Raman scattering (SERS) is well-recognized as a powerful analytical tool for ultrahighly sensitive detection of analytes. In this article, we present a kind of silicon-based SERS sensing platform made of a hairpin DNA-modified silver nanoparticles decorated silicon wafer (AgNPs@Si).
Begoña Martín-Fernández et al.
Talanta, 146, 490-495 (2015-12-24)
Electrochemical genosensors have undergone an enormous development in the last decades, but only very few have achieved a quantification of target content in highly processed food samples. The detection of allergens, and particularly gluten, is challenging because legislation establishes a
Toshiki Matsui et al.
Acta biomaterialia, 13, 32-41 (2014-12-03)
Polylactic acid (PLA) is a candidate material to prepare scaffolds for 3-D tissue regeneration. However, cells do not adhere or proliferate well on the surface of PLA because it is hydrophobic. We report a simple and rapid method for inducing
Raquel García-González et al.
Talanta, 142, 11-19 (2015-05-25)
Amplification-free (referring to enzymatic amplification step) detection methodologies are increasing in biosensor development due to the need of faster and simpler protocols. However, for maintaining sensitivity without this step, highly detectable molecules or very sensitive detection techniques are required. The
An electronic nose based on coated piezoelectric quartz crystals to certify ewes' cheese and to discriminate between cheese varieties.
Paris VF, et al.
Sensors, 12(2), 1422-1436 (2012)
Andres Lombana et al.
Journal of peptide science : an official publication of the European Peptide Society, 20(7), 563-569 (2014-06-13)
Development of resistant bacteria onto biomaterials is a major problem leading to nosocomial infections. Antimicrobial peptides are good candidates for the generation of antimicrobial surfaces because of their broad-spectrum activity and their original mechanism of action (i.e. rapid lysis of
Yinfei Mao et al.
Talanta, 143, 381-387 (2015-06-17)
Owing to its diversified structures, high affinity, and specificity for binding a wide range of non-nucleic acid targets, aptamer is a useful molecular recognition tool for the design of various biosensors. Herein, we report a new signal-on electrochemical biosensing platform
DNA technology for small molecules sensing: a new approach for Acetamiprid detection.
AISEM Annual Conference, 2015 XVIII, 18(6), 1-4 (2015)
Shao-Hua Wu et al.
Biosensors & bioelectronics, 73, 41-46 (2015-06-05)
A new gold particles modified heated copper disk electrode (Au-HCuDE) with direct current was fabricated. The hemin/G-quadruplex horseradish peroxidase-mimicking DNAzyme (HRP-DNAzyme) was self-assembled on the heated electrode and resulted in a new biosensor denoted as HRP-DNAzyme/Au-HCuDE. By controlling the temperature
Anna Miodek et al.
Sensors (Basel, Switzerland), 15(10), 25015-25032 (2015-10-02)
An aptasensor with enhanced anti-fouling properties has been developed. As a case study, the aptasensor was designed with specificity for human thrombin. The sensing platform was developed on screen printed electrodes and is composed of a self-assembled monolayer made from
Lando L G Schwenen et al.
Scientific reports, 5, 12006-12006 (2015-07-15)
Even though a number of different in vitro fusion assays have been developed to analyze protein mediated fusion, they still only partially capture the essential features of the in vivo situation. Here we established an in vitro fusion assay that
Ali Benvidi et al.
Analytical biochemistry, 484, 24-30 (2015-05-20)
We have designed a simple and novel electrochemical biosensor based on glassy carbon electrode (GCE) for DNA detection. GCE was modified with reduced graphene oxide (RGO) and gold nanoparticles (AuNPs) by the electrochemical method, which is helpful for immobilization of
Ning Xia et al.
Analytica chimica acta, 878, 95-101 (2015-05-24)
MicroRNAs (MiRNAs) have been regarded as clinically important biomarkers and drug discovery targets. In this work, we reported a simple and ultrasensitive electrochemical method for miRNAs detection based on single enzyme amplification and electrochemical-chemical-chemical (ECC) redox cycling. Specifically, upon contact
Wei Wen et al.
Biosensors & bioelectronics, 71, 13-17 (2015-04-17)
In this work, a sensitive exonuclease-assisted amplification electrochemical aptasensor through insertion approach was developed for the detection of mucin 1 (MUC 1). In order to construct the aptasensor, 6-Mercapto-1-hexanol (MCH) was used to block partial sites of gold electrode (GE)
Ping Li et al.
Sensors (Basel, Switzerland), 15(8), 20543-20556 (2015-08-27)
A simple DNA-redox cation interaction enhancement strategy has been developed to improve the sensitivity of electrochemical immunosensors for protein detection. Instead of labeling with fluorophores or redox-active groups, the detection antibodies were tethered with DNA single strands. Based on the
Behnoosh Tajik-Ahmadabad et al.
Chembiochem : a European journal of chemical biology, 18(10), 921-930 (2017-02-25)
Biophysical studies were undertaken to investigate the binding and release of short interfering ribonucleic acid (siRNA) from lyotropic liquid crystalline lipid nanoparticles (LNPs) by using a quartz crystal microbalance (QCM). These carriers are based on phytantriol (Phy) and the cationic
Eunsu Chung et al.
Biosensors & bioelectronics, 64, 560-565 (2014-10-14)
Surface-enhanced Raman scattering (SERS)-based aptasensor platform, using double strand DNA-embedded Au/Ag core-shell nanoparticles, has been developed for the ultrasensitive detection of bisphenol A (BPA) in water. By combining optimally controlled Au/Ag core-shell nanoparticles with the selective BPA binding characteristics of
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