Association of the physical and chemical properties and the cytotoxicity of metal oxide nanoparticles: metal ion release, adsorption ability and specific surface area

Metallomics ◽  
2012 ◽  
Vol 4 (4) ◽  
pp. 350 ◽  
Author(s):  
Masanori Horie ◽  
Katsuhide Fujita ◽  
Haruhisa Kato ◽  
Shigehisa Endoh ◽  
Keiko Nishio ◽  
...  
Keyword(s):  
Metal Ion ◽  
Metal Oxide Nanoparticles ◽  
Chemical Properties ◽  
Oxide Nanoparticles ◽  
Physical And Chemical Properties ◽  
Ion Release ◽  
Adsorption Ability ◽  
Metal Ion Release ◽  
Physical And Chemical ◽  
And Chemical Properties

scholarly journals Effect of Li, Na and K Modification of Alumina on its Physical and Chemical Properties and Water Adsorption Ability

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4212 ◽  
Author(s):  
Sergey Reshetnikov ◽  
Irina Kurzina ◽  
Alesia Livanova ◽  
Eugene Meshcheryakov ◽  
Lyubov Isupova
Keyword(s):  
Low Temperature ◽  
Water Adsorption ◽  
Chemical Properties ◽  
Raw Material ◽  
Physical And Chemical Properties ◽  
High Adsorption ◽  
Initial Sample ◽  
Adsorption Ability ◽  
Physical And Chemical ◽  
And Chemical Properties

The effect of alkali metal (Li, Na, K) incorporation on the morphology and water vapor uptake properties of mesoporous Al2O3 has been studied. The modification of the raw material, pseudoboehmite, represented a mixture of low-temperature phases (γ + η + χ)-Al2O3, and has been done at low-temperature that does not change the phase ratio. A decrease in specific surface values and an average pores size increase were observed as a result of the introduction of metal cations by impregnation and subsequent thermal treatment. The influence of the content of the modifying metal on the adsorption ability of the obtained samples in relation to water vapours has been studied. It has been established that alkaline modification Al2O3 with the lithium cations did not result in adsorption ability improvement, whereas samples that were modified with sodium or potassium in the amount of 1.2 weight % and 2.6 weight %, respectively, possess a higher equilibrium capacity (by ~40%), as compared to that of the initial sample (Al2O3), and a sufficiently high adsorption rate.

Nanoparticulate Functional Materials: Green Synthesis and Application for the Degradation of Phenolic Compounds

2012 ◽  
Vol 476-478 ◽  
pp. 1608-1611
Author(s):  
Feng Zhang
Keyword(s):  
Phenolic Compounds ◽  
Zinc Oxide Nanoparticles ◽  
Chemical Properties ◽  
Functional Materials ◽  
Oxide Nanoparticles ◽  
Physical And Chemical Properties ◽  
Nano Zno ◽  
Physical And Chemical ◽  
Zinc Acetate Precursor ◽  
And Chemical Properties

Zinc oxide nanoparticles was synthesized by microwave decomposition of zinc acetate precursor. Horseradish peroxidase (HRP) was immobilized on nano-ZnO. The catalytic activity, physical, and chemical properties of immobilized HRP as well as the interaction between HRP and nano-ZnO was studied. The Nano-ZnO immobilized HRP showed a better property in the thermostability, active pH stability. The Nano-ZnO is more effective than free HRP in the removal of many phenolic compounds. The results show that nano-ZnO is strong functional materials for envrionment protection.

Nanoparticles of cerium oxide. The application and cerium oxide toxicity assessment

2021 ◽  
pp. 38-43
Author(s):  
Maria N. Kuznetsova ◽  
Vera Yu. Zhilkina
Keyword(s):  
Cerium Oxide ◽  
Modern Science ◽  
Chemical Properties ◽  
Toxicity Assessment ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Oxide Material ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Nanotechnology is the most perspective direction in the modern science and technic. The great interest in entire world has been observing to nanoparticles properties and their fields of use investigation. Cerium dioxide is a perspective oxide material which has wide use in different branches of industry due to its unique physical and chemical properties. Burst of interest to cerium oxide nanoparticles development and use in biology and medicine takes has been taking place recently. Scientists in many countries have been carrying out cerium oxide nanoparticles efficiency of use against various diseases.

A Systematic Study of the Catalytic Behavior at Enzyme–Metal-Oxide Nanointerfaces

Nano LIFE ◽  
2014 ◽  
Vol 04 (02) ◽  
pp. 1450005 ◽  
Author(s):  
Alan S. Campbell ◽  
Chenbo Dong ◽  
Andrew Maloney ◽  
Jeremy Hardinger ◽  
Xiao Hu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Mechanical Stability ◽  
Metal Oxide Nanoparticles ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Catalytic Behavior ◽  
Physical And Chemical ◽  
And Chemical Properties

Metal-oxide nanoparticles with high surface area, controllable functionality and thermal and mechanical stability provide high affinity for enzymes when the next generation of biosensor applications are being considered. We report on the synthesis of metal-oxide-based nanoparticles (with different physical and chemical properties) using hydrothermal processing, photo-deposition and silane functionalization. Physical and chemical properties of the user-synthesized nanoparticles were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and Raman scattering, respectively. Thus, characterized metal-oxide-based nanoparticles served as nanosupports for the immobilization of soybean peroxidase enzyme (a model enzyme) through physical binding. The enzyme–nanosupport interface was evaluated to assess the optimum nanosupport characteristics that preserve enzyme functionality and its catalytic behavior. Our results showed that both the nanosupport geometry and its charge influence the functionality and catalytic behavior of the bio-metal-oxide hybrid system.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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