A Simple Method for Producing Micrometer-Sized Monodisperse Polystyrene Particles in Aqueous Media

2000 ◽  
Vol 230 (1) ◽  
pp. 210-212 ◽  
Author(s):  
Shinya Orihara ◽  
Mikio Konno
Keyword(s):  
Aqueous Media ◽  
Simple Method ◽  
Monodisperse Polystyrene

scholarly journals Study on the synthesis of porphyrin-modified copper ferrite as photocatalyst for treatment of mb organic dye in aqueous media

2020 ◽  
Vol 9 (3) ◽  
pp. 107-111
Author(s):  
Chinh Tran Van ◽  
Anh Nguyen Tuan ◽  
Phuong Nguyen Thi Hoai ◽  
Thuan Mai Huu ◽  
Khanh Tran Van ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Ferrite Nanoparticles ◽  
Organic Dye ◽  
Copper Ferrite ◽  
Simple Method ◽  
External Magnet ◽  
Porphyrin Derivatives

This work aims to modify the copper ferrite with a porphyrin derivatives by a simple method of self-assembly. The resultant porphyrin-modified copper ferrite was utilized as a photocatalyst for the removal of methyl blue dyes (MB) from aqueous solution. The results showed that the porphyrin nanofibers were well-intergrated with the copper ferrite nanoparticles. The porphyrin-modified copper ferrite materials exhibited the high photocatalytic performance toward MB dye with the removal percentage of approximately 100% after 200 minutes of irradiation under simulated light. The catalyst could be facilely separate by using a external magnet and reused.

scholarly journals Development of Effective Lipase-Hybrid Nanoflowers Enriched with Carbon and Magnetic Nanomaterials for Biocatalytic Transformations

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 808 ◽  
Author(s):  
Renia Fotiadou ◽  
Michaela Patila ◽  
Mohamed Amen Hammami ◽  
Apostolos Enotiadis ◽  
Dimitrios Moschovas ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Immobilized Lipase ◽  
Aqueous Media ◽  
Deep Eutectic Solvents ◽  
Operational Stability ◽  
Magnetic Nanomaterials ◽  
Energy Dispersion Spectroscopy ◽  
Simple Method ◽  
Pseudozyma Antarctica ◽  
Carbon Based Nanomaterials

In the present study, hybrid nanoflowers (HNFs) based on copper (II) or manganese (II) ions were prepared by a simple method and used as nanosupports for the development of effective nanobiocatalysts through the immobilization of lipase B from Pseudozyma antarctica. The hybrid nanobiocatalysts were characterized by various techniques including scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). The effect of the addition of carbon-based nanomaterials, namely graphene oxide and carbon nanotubes, as well as magnetic nanoparticles such as maghemite, on the structure, catalytic activity, and operational stability of the hybrid nanobiocatalysts was also investigated. In all cases, the addition of nanomaterials during the preparation of HNFs increased the catalytic activity and the operational stability of the immobilized biocatalyst. Lipase-based magnetic nanoflowers were effectively applied for the synthesis of tyrosol esters in non-aqueous media, such as organic solvents, ionic liquids, and environmental friendly deep eutectic solvents. In such media, the immobilized lipase preserved almost 100% of its initial activity after eight successive catalytic cycles, indicating that these hybrid magnetic nanoflowers can be applied for the development of efficient nanobiocatalytic systems.

Green Synthesis of CoFe2O4 and Investigation of its Catalytic Efficiency for Degradation of Dyes in Aqueous Medium

2018 ◽  
Vol 232 (3) ◽  
pp. 359-371 ◽  
Author(s):  
Muhammad Saeed ◽  
Asim Mansha ◽  
Muhammad Hamayun ◽  
Aziz Ahmad ◽  
Atta Ulhaq ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Green Synthesis ◽  
Aqueous Medium ◽  
Heterogeneous Catalysts ◽  
Aqueous Media ◽  
Catalytic Efficiency ◽  
Catalytic Wet Oxidation ◽  
Simple Method ◽  
Langmuir Hinshelwood Mechanism ◽  
Bimetallic Oxides

AbstractThe catalytic wet oxidation is one the methods used for elimination of dyes from aqueous medium in which various metal based materials can be used as heterogeneous catalysts. Bimetallic oxides as heterogeneous catalysts have gained much attention as bimetallization improve the catalytic properties of the resulting particles. The biosynthetic green method is the most viable and simple method for synthesis of bimetallic oxides nanoparticles. Here, we report the green synthesis of CoFe2O4particles usingAzadirachata indicaleaves extract as reducing and stabilizing agent. The synthesized particles were characterized using X-ray diffraction, thermogravimetric analysis, Fourier-transform infrared spectroscopy and scanning electron microscopy. The synthesized CoFe2O4particles were tested as a catalyst for mineralization of rhodamine B and methylene blue dyes in the presence of hydrogen peroxide in aqueous media. More than 95% dyes degraded in 120 min. The reaction kinetics was described in terms of Langmuir–Hinshelwood mechanism which suggests that molecules of dye and hydrogen peroxide adsorbed surface of CoFe2O4and then react together.

Facile synthesis of polyaniline/carbon dot nanocomposites and their application as a fluorescent probe to detect mercury

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41914-41919 ◽  
Author(s):  
Xiufang Wang ◽  
Jun Zhang ◽  
Wensheng Zou ◽  
Runxia Wang
Keyword(s):  
Fluorescent Probe ◽  
Aqueous Media ◽  
Selective Detection ◽  
Facile Synthesis ◽  
Simple Method ◽  
Carbon Dot

Novel polyaniline/carbon dot nanocomposites have been synthesized using a simple method, and a PANI/Cdot “off–on” fluorescent probe has been constructed for the simple, ultrasensitive and selective detection of Hg2+ in aqueous media.

A simple way for producing holographic filters suitable for image improvement

1978 ◽  
Vol 36 (1) ◽  
pp. 226-227
Author(s):  
K.-H. Herrmann ◽  
E. Reuber ◽  
P. Schiske
Keyword(s):  
Transfer Functions ◽  
Diffraction Order ◽  
Lateral Position ◽  
Simple Method ◽  
Spatial Frequencies ◽  
Resolution Electron ◽  
Wiener Filters ◽  
Image Improvement ◽  
Optical Reconstruction ◽  
Set Up

Aposteriori deblurring of high resolution electron micrographs of weak phase objects can be performed by holographic filters [1,2] which are arranged in the Fourier domain of a light-optical reconstruction set-up. According to the diffraction efficiency and the lateral position of the grating structure, the filters permit adjustment of the amplitudes and phases of the spatial frequencies in the image which is obtained in the first diffraction order.In the case of bright field imaging with axial illumination, the Contrast Transfer Functions (CTF) are oscillating, but real. For different imageforming conditions and several signal-to-noise ratios an extensive set of Wiener-filters should be available. A simple method of producing such filters by only photographic and mechanical means will be described here.A transparent master grating with 6.25 lines/mm and 160 mm diameter was produced by a high precision computer plotter. It is photographed through a rotating mask, plotted by a standard plotter.

Rotary Beveling for In Situ Thin-Section Microscopy of Cell Cultures

1981 ◽  
Vol 39 ◽  
pp. 550-551
Author(s):  
Dean A. Handley ◽  
Jack T. Alexander ◽  
Shu Chien
Keyword(s):  
Cell Growth ◽  
Cell Cultures ◽  
Molecular Interactions ◽  
Convenient Method ◽  
Petri Dish ◽  
Simple Method ◽  
Thin Section Microscopy ◽  
Thin Sectioning ◽  
Organic Fluids

In situ preparation of cell cultures for ultrastructural investigations is a convenient method by which fixation, dehydration and embedment are carried out in the culture petri dish. The in situ method offers the advantage of preserving the native orientation of cell-cell interactions, junctional regions and overlapping configurations. In order to section after embedment, the petri dish is usually separated from the polymerized resin by either differential cryo-contraction or solvation in organic fluids. The remaining resin block must be re-embedded before sectioning. Although removal of the petri dish may not disrupt the native cellular geometry, it does sacrifice what is now recognized as an important characteristic of cell growth: cell-substratum molecular interactions. To preserve the topographic cell-substratum relationship, we developed a simple method of tapered rotary beveling to reduce the petri dish thickness to a dimension suitable for direct thin sectioning.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

Development of a simple method for the determination of single nucleotide polymorphisms

2010 ◽  
Vol 34 (8) ◽  
pp. S75-S75
Author(s):  
Weifeng Zhu ◽  
Zhuoqi Liu ◽  
Daya Luo ◽  
Xinyao Wu ◽  
Fusheng Wan
Keyword(s):  
Single Nucleotide Polymorphisms ◽  
Nucleotide Polymorphisms ◽  
Simple Method ◽  
Single Nucleotide
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