نتایج جستجو برای: transition metal ions

تعداد نتایج: 546120  

2017
Guangjie He Chenxi Liu Xiaobo Liu Qingzhi Wang Aiying Fan Songjun Wang Xinlai Qian

Copper, as the third most abundant transition metal ions of human, plays an essential role in the redox reaction, signal transduction, hematopoiesis, and other physiological processes. Abnormal content of copper ions in the body will cause some diseases such as anemia, coronary heart disease, Menkes' syndrome. In this article, a new fluorescence probe L for Cu2+ was designed and synthetized by ...

2015
Yan Wang Jin Guo Tingfeng Wang Junfeng Shao Dong Wang Ying-Wei Yang

Recently, transition metal oxides, such as ruthenium oxide (RuO₂), manganese dioxide (MnO₂), nickel oxides (NiO) and cobalt oxide (Co₃O₄), have been widely investigated as electrode materials for pseudo-capacitors. In particular, these metal oxides with mesoporous structures have become very hot nanomaterials in the field of supercapacitors owing to their large specific surface areas and suitab...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2000
mohammad reza yaftian morteza vahedpoor michel burgard dominique matt

the solvent extraction of rare earth metal ions from nitrate solutions by 5.11.17.23-tetra-tert-butyl-25,27-bis(diethylcarbamoylmethoxy)-26,28-dihydroxycalix[4]arene (l) in 1,2-dichloroethane has been investigated. the alalysis of the extraction equilibrium obtained from a mixture of la3+, eu3+, er3+ and y3+ revealed that the extracted species have a 1:1 metal/ligand ratio. the intra-group sepa...

Journal: :journal of advanced materials and processing 0
hadi baseri damghan university, damghan, iran saeed tizro damghan university, damghan. iran

co-precipitation procedure was applied in order to obtain different kinds of magnetic nanoadsobents for the removal of pb(ii) and cu(ii) toxic metal ions from wastewater samples. prepared nanoadsorbents were characterized by fourier transform infrared spectroscopy (ft-ir), x-ray diffractometer (xrd), scanning electron microscopy (sem) and thermogravimetric analysis (tga). the average sizes of t...

2012
SANGEETA SAHU

Transition metal ion has been receiving a great attention in the recent years, as the high concentration of toxic metal ions. This paper deals with short review and to study the various types of transition metals present in waste water released from Pulp and Paper effluents. These are being constantly poured into the environment, which result in the long lasting bio-hazards in the aquatic eco-s...

Journal: :Journal of lipid research 1993
C P Sparrow J Olszewski

The oxidation of low density lipoprotein (LDL) may be important in atherosclerosis. LDL can be oxidized by cultured cells, including macrophages and endothelial cells. This cellular oxidation is dependent on transition metal ions in the medium. We now report that LDL oxidation by endothelial cells and macrophages is caused by cell-dependent appearance of thiol in the medium ("thiol production")...

2015
Jürgen Ulrich Linder Oleg Y. Dmitriev

YHS-domains are small protein modules which have been proposed to bind transition-metal ions like the related TRASH-domains. They are found in a variety of enzymes including copper-transporting ATPases and adenylyl cyclases. Here we investigate a class IIIc adenylyl cyclase from Mycobacterium phlei which contains a C-terminal YHS-domain linked to the catalytic domain by a peptide of 8 amino aci...

2014
Lei Zhang Ivan J. Dmochowski Gary A. Molander Christopher B. Murray Richard Perry Larry G. Sneddon

In this thesis, interaction of ferritin with transition metal ions and chelates is studied. First, a simple method for synthesizing gold nanoparticles stabilized by horse spleen apoferritin (HSAF) was reported using NaBH4 or 3-(N-morpholino)propanesulfonic acid (MOPS) as the reducing agent. The average particle diameters were 3.6 and 15.4 nm for NaBH4-reduced and MOPS-reduced Au-HSAF, respectiv...

Journal: :Chemical communications 2008
Daniela Natale Juan C Mareque-Rivas

This feature article presents an overview of the types of hydrogen bonding interactions involving metal complexes and their functional effects. It shows with recent examples why hydrogen bonds have become a crucial functional and structural element in modern inorganic chemistry. The relevance of this combination in tackling current chemistry challenges such as energy production and the developm...

Journal: :Angewandte Chemie 2012
Thomas N Hooper Jürgen Schnack Stergios Piligkos Marco Evangelisti Euan K Brechin

One of the most promising applications for molecules built from paramagnetic metal ions is low-temperature magnetic refrigeration. Indeed, recent studies have suggested that molecular coolers can outperform any conventionally employed solid-state refrigerant material by orders of magnitude. In order to do so, molecules must possess a combination of a large spin ground state (S), with negligible...

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