101 Result(s)
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Article
Synthesis of Fluorinated Urchin-like Serried Hydroxyapatite with Improved Water Sorption-Solubility and Bioactivity for Dental Composites
Fluorine is present in the hydroxyapatite mineral in natural tooth enamel, which plays a key role in the prevention of dental caries. The aim of this study is to synthetize the fluorinated urchin-like serried h.....
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Open AccessDetermination of tyrosine by sodium fluorescein-enhanced ABEI–H2O2–horseradish peroxidase chemiluminescence
In this study, N-(4-aminobutyl)-N-ethylisoluminol (ABEI) was used as an energy donor, while sodium fluorescein was used as an enhancer and energy acceptor, which resulted in it producing resonance energy trans...
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Article
Single and Binary Dye Adsorption of Methylene Blue and Methyl Orange in Alcohol Aqueous Solution via Rice Husk Based Activated Carbon: Kinetics and Equilibrium Studies
The present work was mainly focused on the single and binary adsorption of methylene blue(MB) and methyl orange(MO) from alcohol aqueous solution over rice husk based activated carbon(RHAC). The study of singl...
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Article
Salmonella typhimurium detector based on the intrinsic peroxidase-like activity and photothermal effect of MoS2
A multimode dot-filtration immunoassay (MDFIA) was established for rapid and accurate detection of the target (Salmonella typhimurium), which was based on the intrinsic color, peroxidase-like activity and photot...
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Article
Ratiometric persistent luminescence aptasensors for carcinoembryonic antigen detection
NIR-emitted ZnGa2O4:Cr3+ persistent luminescence nanoparticles (ZGC NPs) coated with polydopamine (ZGC@PDA NPs) were designed featuring internal reference and quenching ability. Sr-doped Zn2GeO4 persistent lumine...
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Article
Open AccessGold determination in soil by ICP-MS: comparison of sample pretreatment methods
At present, the direct gold determination in geological samples by inductively coupled plasma mass spectrometry (ICP-MS) is still an arduous challenge due to both spectral and background interferences. It is v...
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Article
Colorimetric Sensor for Thiocyanate Based on Anti-aggregation of Gold Nanoparticles in the Presence of 2-Aminopyridine
Based on the anti-aggregation mechanism of citrate stabilized gold nanoparticle (AuNPs), a new specific and sensitive colorimetric sensor for thiocyanate (SCN−) was developed. In this scheme, the AuNPs were aggre...
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Article
Core-shell Au@Pt Nanoparticles Catalyzed Luminol Chemiluminescence for Sensitive Detection of Thiocyanate
In this study, core-shell Au@Pt nanoparticles (Au@Pt NPs) with peroxidase catalytic activity were synthesized by the seed-mediated method, and were used to catalyze the reaction of luminol-H2O2 to enhance the che...
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Article
Rapid Detection for Salmonella typhimurium by Conventional Resistive Temperature Sensor Based on Photothermal Effect of Carboxylated Graphene Oxide
Photothermal effect of nanomaterial has been applied to the establishment of rapid detection method such as test strip. Previously, the detector for the photothermal test strip method mainly was a bulky therma...
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Article
A sensitive method to determine dopamine in the presence of uric acid based on In2O3 nanosheet arrays grown on 3D graphene
A nonenzymatic voltammetric assay for dopamine (DA) was developed based on the combination of three-dimensional graphene (3D Gr) and indium oxide nanosheet arrays (In2O3 NSAs). 3D Gr was prepared by chemical vapo...
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Article
Simultaneous Determination of Free Phytosterols and Tocopherols in Vegetable Oils by an Improved SPE–GC–FID Method
In this work, a simple and rapid SPE–GC–FID method for simultaneous determination of free tocopherols and phytosterols in vegetable oils was developed. The use of this SPE approach for the extraction of natura...
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Article
Tea Polyphenols Reducing Lipopolysaccharide-induced Inflammatory Responses in RAW264.7 Macrophages via NF-κB Pathway
The anti-inflammatory activity of tea polyphenols(TPs) in RAW264.7 macrophages stimulated by lipopolysaccharide(LPS) was investigated in this paper. RAW264.7 macrophages were treated with different concentrati...
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Article
Water-soluble Hemin-mPEG-enhanced Luminol Chemiluminescence for Sensitive Detection of Hydrogen Peroxide and Glucose
In the present study, we synthesized a water-soluble substance (Hemin-mPEG) at room temperature by using hemin and poly(ethylene glycol) methyl ether (mPEG). It was found that the Hemin-mPEG maintained the exc...
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Article
Carboxylate-induced Various Structures of Ni(II) Complexes with Fluorescence Sensing and Bifunctional Electrochemical Properties
We synthesized three new Ni(II) coordination polymers [Ni(L)(HIP)(H2O)2]H2O(CP1), [Ni(L)(NIP)]·2H2O(CP2) and [Ni(L)(NDC)(H2O)2](CP3)[L=N,N'-bis(pyridine-3-yl)thiophene-2,5-dicarboxamide, H2HIP=5-hydroxyisophthali...
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Article
POMs as Active Center for Sensitively Electrochemical Detection of Bisphenol A and Acetaminophen
A new type of electrochemical sensor based on multi-walled carbon nanotubes(MWCNTs), K2H4SiW11CuO39·6H2O(SiW11Cu) and gold nanoparticles(AuNPs) was prepared for the simultaneous detection of bisphenol A and aceta...
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Article
Electrochemiluminescent determination of the activity of uracil-DNA glycosylase: Combining nicking enzyme assisted signal amplification and catalyzed hairpin assembly
An electrochemiluminescence (ECL) based method is described for the determination of the activity of the enzyme uracil-DNA glycosylase (UDG). It is based on the use of nicking enzyme-assisted signal amplificat...
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Article
Multiplexed determination of intracellular messenger RNA by using a graphene oxide nanoprobe modified with target-recognizing fluorescent oligonucleotides
A multiplexed graphene oxide (GO) fluorescent nanoprobe is described for quantification and imaging of messenger RNAs (mRNAs) in living cells. The recognizing oligonucleotides (with sequences complementary to ...
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Article
Identification of pathogenic bacteria in human blood using IgG-modified Fe3O4 magnetic beads as a sorbent and MALDI-TOF MS for profiling
A method is described for fast identification of bacteria by combining (a) the enrichment of bacterial cells by using magnetite (Fe3O4) magnetic beads modified with human IgG (IgG@Fe3O4) and (b) MALDI-TOF MS anal...
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Article
Tuning morphology and conductivity in two-step synthesis of zinc-cobalt oxide and sulfide hybrid nanoclusters as highly-performed electrodes for hybrid supercapacitors
We reported a facile two-step hydrothermal procedure to prepare zinc-cobalt oxide and sulfide hybrid nanoclusters (ZCOSH NCs), initialized by the synthesis of metal oxides and followed by the partial substitut...
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Article
An ultrasensitive and simple method for alkaline phosphatase assay and targeted natural compound screening in vitro
As an essential phosphate group hydrolase, alkaline phosphatase (ALP), whose level in serum is correlated with bone disease, liver dysfunction, and cancer, could be used as a biomarker for clinical diagnosis a...
