scholarly journals Recent Advances in AIEgens for Metal Ion Biosensing and Bioimaging

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4593 ◽  
Author(s):  
Yongming Li ◽  
Huifei Zhong ◽  
Yanyan Huang ◽  
Rui Zhao
Keyword(s):  
Metal Ions ◽  
Biological System ◽  
Metal Ion ◽  
Fluorescence Probes ◽  
Aggregation Induced Emission ◽  
The Past ◽  
Recent Advances ◽  
System Approaches ◽  
Sensing Performance

Metal ions play important roles in biological system. Approaches capable of selective and sensitive detection of metal ions in living biosystems provide in situ information and have attracted remarkable research attentions. Among these, fluorescence probes with aggregation-induced emission (AIE) behavior offer unique properties. A variety of AIE fluorogens (AIEgens) have been developed in the past decades for tracing metal ions. This review highlights recent advances (since 2015) in AIE-based sensors for detecting metal ions in biological systems. Major concerns will be devoted to the design principles, sensing performance, and bioimaging applications.

scholarly journals Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

RSC Advances ◽  
2021 ◽  
Vol 11 (58) ◽  
pp. 36528-36553
Author(s):  
Ahmad K. Badawi ◽  
M. Abd Elkodous ◽  
Gomaa A. M. Ali
Keyword(s):  
Water Treatment ◽  
Metal Ions ◽  
Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Recent Advances ◽  
Metal Ions Removal

Various materials including waste precursors used as adsorbents for water treatment (dyes and metal ions removal).

An aggregation-induced emission star polymer with pH and metal ion responsive fluorescence

2016 ◽  
Vol 7 (42) ◽  
pp. 6513-6520 ◽  
Author(s):  
Yuming Zhao ◽  
Wen Zhu ◽  
Ying Wu ◽  
Lin Qu ◽  
Zhengping Liu ◽  
...  
Keyword(s):  
Metal Ions ◽  
Ring Opening ◽  
Metal Ion ◽  
Star Polymers ◽  
Star Polymer ◽  
One Pot ◽  
Active Star ◽  
Metathesis Polymerization ◽  
Aggregation Induced Emission ◽  
Emission Star

A one-pot strategy from ring-opening metathesis polymerization was employed to prepare AIE-active star polymers, which were designed to have multi-responsive fluorescence to varied stimuli including pH, CO2, and metal ions.

scholarly journals Nanocellulose/graphene oxide layered membranes: elucidating their behaviour during filtration of water and metal ions in real time

Nanoscale ◽  
2019 ◽  
Vol 11 (46) ◽  
pp. 22413-22422 ◽  
Author(s):  
Luis Valencia ◽  
Susanna Monti ◽  
Sugam Kumar ◽  
Chuantao Zhu ◽  
Peng Liu ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Real Time ◽  
Metal Ion ◽  
Computational Simulations ◽  
Reactive Molecular Dynamics

In situ SAXS and reactive molecular dynamics (ReaxFF) computational simulations of water and metal ion interaction with CNF–GO layered membranes.

Spatial Distribution of Metal Ions in Spruce Wood by Synchrotron Radiation Microbeam X-Ray Fluorescence Analysis

Holzforschung ◽  
1999 ◽  
Vol 53 (5) ◽  
pp. 474-480 ◽  
Author(s):  
Annica Berglund ◽  
Harald Brelid ◽  
Anders Rindby ◽  
Per Engström
Keyword(s):  
Synchrotron Radiation ◽  
Metal Ions ◽  
Metal Ion ◽  
Fluorescence Analysis ◽  
X Ray ◽  
Metal Ion Analysis ◽  
Before And After ◽  
Non Destructive

Summary The possibility of using synchrotron radiation microbeam X-ray fluorescence (μ -XRF) for the determination of the morphological distribution of inorganic elements in wood has been investigated. A number of samples were analyzed and some of the results are presented in this paper. The new application of the method showed good results and it was concluded that the technique is useful for specific in situ metal ion analysis of wood. One of its special advantages is that it is a non-destructive method, which may allow analysis of the same sample before and after a chemical treatment. This study shows the natural distribution of a selection of metal ions in wood. Some differences in the distribution and amount of certain metals could also be observed in a sample that had been subjected to treatment with an EDTA-solution.

Kraft pulp bleaching using dimethyldioxirane: stability of the oxidants

1996 ◽  
Vol 74 (2) ◽  
pp. 232-237 ◽  
Author(s):  
J. Bouchard ◽  
C. Maine ◽  
R.M. Berry ◽  
D.S. Argyropoulos
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Kraft Pulp ◽  
Transition Metal Ions ◽  
Pulp Bleaching ◽  
Simultaneous Generation ◽  
Kraft Pulp Bleaching ◽  
Alkaline Conditions

Dimethyldioxirane (DMD) is a cyclic peroxide made by oxidizing acetone with peroxymonosulfate (PMS) in water buffered at pH 7.5 using sodium bicarbonate. It has been shown that DMD generation can be achieved in situ within a pulp suspension allowing very selective TCF bleaching of kraft pulp. This process involves simultaneous generation of DMD, reaction of PMS and DMD with residual lignin, and spontaneous decomposition of both oxidants. The first part of this work is a kinetics study of the decomposition of PMS and DMD as a function of pH under conditions similar to those for in situ bleaching. The effect of chelation as well as the effect of transition metal ions on decomposition rate was also investigated. DMD is very sensitive to pH and its half-life is very short under alkaline conditions. The presence of any transition metal ion that can be involved in a one-electron transfer is detrimental to DMD stability. However, fast reaction of DMD with pulp almost counteracts the effect of metal ions. Key words: bleaching, peroxymonosulphate, dimethyldioxirane, metal ions, kinetics, decomposition, kraft pulp.

Epitaxial growth of nanocrystalline lead sulfide particles at monolayers

1992 ◽  
Vol 50 (2) ◽  
pp. 1014-1015
Author(s):  
Jianping Yang ◽  
Xiao Kang Zhao ◽  
Janos H. Fendler
Keyword(s):  
Metal Ion ◽  
Brewster Angle Microscopy ◽  
Monolayer Formation ◽  
The Past ◽  
Optical Isolation ◽  
Langmuir Film Balance ◽  
Semiconductor Particles ◽  
The Subject ◽  
Film Balance

Generation of size-quantized semiconductor particulate films (SQSPFs) from their precursors has been the subject of intense investigations in our laboratory during the past several years. Most recently, we have utilized monolayers as templates for SQSPFs. Semiconductor particles were generated in situ at the monolayer headgroup-aqueous subphase interface. An appropriate aqueous metal ion solution (1.0 × 10-3 M Pb(NO3)2, or CdCl2, or ZnCl2, or CuSO4, for example) constituted the subphase. Either a commercial Lauda Model P Langmuir film balance or a simple circular trough was used for monolayer formation and the subsequent generation of semiconductor particles. The Lauda film balance was enclosed in a plexiglass hood and placed on a Micro-g optical isolation table. The water surface was cleaned several times by sweeping with a teflon barrier prior to monolayer formation. The monolayer-forming surfactants were compressed at a rate of (2-5) 10-3 Å2 per molecule per second. Subsequent to five to 15 min of incubation at the desired surface pressure (typically 25 mN/m), H2S was slowly injected into the nitrogen-filled plexiglass hood covering the film balance. Semiconductor particle formation at the monolayer surface was visually observed and monitored by reflectivity measurements and Brewster-angle microscopy.

Removal of Heavy Metal Ions with Hacac-Silica

2014 ◽  
Vol 901 ◽  
pp. 45-51
Author(s):  
Dan Feng Cui ◽  
Jian Zhuang Zhao ◽  
Yan Ying Zheng
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
High Specific Surface Area ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Ultrasonic Technology ◽  
Heavy Metal Ion Removal

This paper presents a new decoration view functionalization of mesoporous silica to extend their applications to heavy metal ion removal. The study showed that Hacac can be incorporated into the structure through in-situ strategy, and the calcined Hacac-silica possesses advantages of high specific surface area of about 1496 m2/g and pore size of 4nm, ordered spheric morphology of about 300nm in diameter. Auxiliary by ultrasonic technology, the heavy metal ions remove rates are more than 95% for Pb2+, Cu2+ and Cr3+. More choice of chelating agents can be used for further functionalization of silica based mesoporous material.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

In situ microprobe quantitation of inorganic particle burden in paraffin sections of lung tissue

1988 ◽  
Vol 46 ◽  
pp. 990-991
Author(s):  
Jerrold L. Abraham
Keyword(s):  
Lung Tissue ◽  
Quantitative Information ◽  
Particulate Material ◽  
Paraffin Sections ◽  
Tissue Samples ◽  
Qualitative And Quantitative ◽  
The Past ◽  
Quantitative Analyses ◽  
Data Result

Inorganic particulate material of diverse types is present in the ambient and occupational environment, and exposure to such materials is a well recognized cause of some lung disease. To investigate the interaction of inhaled inorganic particulates with the lung it is necessary to obtain quantitative information on the particulate burden of lung tissue in a wide variety of situations. The vast majority of diagnostic and experimental tissue samples (biopsies and autopsies) are fixed with formaldehyde solutions, dehydrated with organic solvents and embedded in paraffin wax. Over the past 16 years, I have attempted to obtain maximal analytical use of such tissue with minimal preparative steps. Unique diagnostic and research data result from both qualitative and quantitative analyses of sections. Most of the data has been related to inhaled inorganic particulates in lungs, but the basic methods are applicable to any tissues. The preparations are primarily designed for SEM use, but they are stable for storage and transport to other laboratories and several other instruments (e.g., for SIMS techniques).

Sign in / Sign up

Export Citation Format

Share Document