Silver nanoclusters stabilized with denatured fish sperm DNA and the application on trace mercury ions detection

Luminescence ◽  
2016 ◽  
Vol 32 (4) ◽  
pp. 674-679 ◽  
Author(s):  
Yangfang Kuang ◽  
Sheng Liang ◽  
Fangfang Ma ◽  
Shu Chen ◽  
Yunfei Long ◽  
...  
Keyword(s):  
Silver Nanoclusters ◽  
Mercury Ions ◽  
Fish Sperm ◽  
Sperm Dna

Stabilization and delivery of bioavailable nanosized iron by fish sperm DNA

2020 ◽  
Vol 11 (7) ◽  
pp. 6240-6250
Author(s):  
Shiyang Li ◽  
Jiayou Zhang ◽  
Yu Miao ◽  
Wei Guo ◽  
Guangxin Feng ◽  
...  
Keyword(s):  
Promising Candidate ◽  
Good Solubility ◽  
Fish Sperm ◽  
Sperm Dna ◽  
Nanosized Iron

Nanosized iron is a promising candidate as an iron fortificant due to its good solubility and bioavailability.

Application of Biomimetic Nanomaterials in Biological Detection and the Intelligent Recognition Method of Nanoparticle Images

2021 ◽  
Vol 16 (1) ◽  
pp. 23-30
Author(s):  
Ying He
Keyword(s):  
Image Segmentation ◽  
Fluorescent Probe ◽  
Gold Nanoclusters ◽  
Silver Ions ◽  
Silver Nanoclusters ◽  
Dual Function ◽  
Mercury Ions ◽  
Watershed Transformation ◽  
Gold Silver ◽  
Biomimetic Nanomaterials

New nanomaterials (metal nanoclusters, graphene, etc.) are favored by researchers due to their unique properties and are widely used in biomedical detection. The excellent fluorescence characteristics of gold nanoclusters are utilized to develop a fast and highly sensitive bionic nanomaterial with non-label and dual functions, which can detect silver ions and mercury ions and study the particularity of TEM nanoparticle images. The particle segmentation of TEM nanoparticle images is studied to compare the traditional watershed algorithm and watershed transformation algorithm. The experiment results show that silver ions can enhance the fluorescence of gold nanoclusters to form gold-silver nanoclusters with strong yellow fluorescence, and mercury ions can quickly weaken the fluorescence of gold-silver nanoclusters. Based on the biomimetic nanomaterials, a dual-function fluorescent probe is designed to detect silver ions and mercury ions in lake with detection accuracy of 8 nM and 33 nM respectively; the sensing excitation of the fluorescent probe is further analyzed. Because the metal-enhanced fluorescence (MEF) effect enables the silver element and Au nanoparticles to form fluorescence-enhancing effect, the high metalphilic interaction between mercury ions and silver ions quenches the fluorescence effect of gold nanocluster; the rapid watershed transformation/region fusion method can achieve better particle image segmentation combined with the image segmentation algorithms of different TEM nanoparticles, which can be better applied to the characterization analysis of the preparation of gold nanomaterials.

DNA - Directed Synthesis of ZnO Nanowires

2008 ◽  
Vol 1094 ◽  
Author(s):  
Micha Jost ◽  
Petia Atanasova ◽  
Peter Gerstel ◽  
Wilfried Sigle ◽  
Peter A. van Aken ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Nitrate Solution ◽  
Zinc Nitrate ◽  
Zno Nanowires ◽  
X Ray Diffraction ◽  
Structure Directing Agent ◽  
Simple Method ◽  
Transmission Electron ◽  
Fish Sperm ◽  
Sperm Dna

AbstractIn this paper, a new and simple method for the synthesis of ZnO nanowires under very mild conditions is presented. The nanowire preparation is based on mineralization from alkaline aqueous zinc nitrate solution in the presence of fish sperm DNA as a structure-directing agent. The morphological features of the obtained structures were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), while the structural characterization of ZnO was done by X-ray diffraction.

scholarly journals Spectroscopic and Electrochemical Studies on the Interaction of Epirubicin with Fish Sperm DNA

2012 ◽  
Vol 9 (3) ◽  
pp. 1587-1598 ◽  
Author(s):  
R. Hajian ◽  
E. Ekhlasi ◽  
R. Daneshvar
Keyword(s):  
Cyclic Voltammetry ◽  
Thermodynamic Parameters ◽  
Strong Interactions ◽  
Binding Force ◽  
Double Stranded Dna ◽  
Fish Sperm ◽  
Sperm Dna ◽  
Apparent Binding Constant ◽  
Different Temperatures ◽  
Voltammetric Behavior

The interactions between epirubicin (EPR) and double stranded DNA (ds-DNA) have been studied by UV-Vis spectrophotometry, cyclic voltammetry, fluorescence spectroscopy and viscometery. The apparent binding constant of epirubicin with DNA was found to be 3.8 × 105mol-1L and was studied at different temperatures. It indicated that the former method could be successfully applied to the determination of epirubicin. Also, the voltammetric behavior of EPR was investigated at glassy carbon electrode using cyclic voltammetry. Thermodynamic parameters including ∆H0, ∆G0and ∆S0were determined as -5.7×104, -3.13×104J mol-1and -87.96 J mol-1K-1 respectively. One indication of the strong interaction between DNA and EP was increasing of viscosity. The diffusion coefficients of EP in the absence (D0)fand presence of ds-DNA (D0)bwas calculated as 5.04×10-6and 1.13×10-6 Cm2s-1respectively. According to the thermodynamic parameters, the main binding force could be judged. The experimental results revealed that EPR and ds-DNA had strong interactions. The mechanism of quenching belonged to static quenching and the main sort of binding force was intercalation.

scholarly journals Pd/DNA as Highly Active and Recyclable Catalyst of Suzuki–Miyaura Coupling

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 552 ◽  
Author(s):  
M. Mart ◽  
W. Tylus ◽  
A. Trzeciak
Keyword(s):  
Phase Separation ◽  
High Activity ◽  
Preparation Method ◽  
Cross Coupling ◽  
Highly Active ◽  
Aryl Bromides ◽  
Fish Sperm ◽  
Sperm Dna ◽  
Simple Phase ◽  
Phenylboronic Acids

Pd/DNA catalysts were prepared in a mixed H2O/EtOH solvent using palladium precursors, Pd(OAc)2 and PdCl2, in different dosages and salmon fish sperm DNA. As prepared, the Pd/DNA contained Pd(II) and Pd(0) nanoparticles of various sizes and morphologies, depending on the preparation method. Pd/DNA efficiently catalyzed the Suzuki–Miyaura cross-coupling of various aryl bromides with phenylboronic acids. The catalyst was recovered by simple phase separation and then reused in seven consecutive cycles with a high activity.

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