نتایج جستجو برای: zinc efficiency

تعداد نتایج: 458916  

2014
D. O. Shah J. Sharma M. Vashishtha

The synthesis of ZnO nanoparticles has attracted considerable interest because of their unique properties and potential applications in a variety of solid state devices, catalytic media etc. By using water-in-oil (w/o) microemulsions, nanodroplets of water were used as chemical reactor to synthesize nanoparticles of zinc oxide. Addition of reducing agent ((NH4)2CO3) and zinc salt (Zn(NO3)2) fol...

2012
Nina Jajčanin-Jozić Peter Macheroux Marija Abramić

Metallopeptidase family M49 is characterized by five conserved sequence regions and the unique motif HEXXGH with two histidines ligands of the active-site zinc ion. The crystal structure of the yeast ortholog represents a prototype for the whole family. To investigate the role of two invariant amino acid residues, a Glu of the zinc-binding motif, and a Tyr, 21Å from the catalytic zinc center, m...

Journal: :Physical chemistry chemical physics : PCCP 2014
Tomofumi Hamamura Joanne Ting Dy Koichi Tamaki Jotaro Nakazaki Satoshi Uchida Takaya Kubo Hiroshi Segawa

Toward the extension of the light-harvesting region of sensitizers in dye-sensitized solar cells (DSSCs), two ethynyl-linked porphyrin trimers were synthesized and investigated. The zinc–freebase–zinc trimer (Zn–FbA–Zn) showed an absorption maximum at a longer wavelength than the all-zinc trimer (Zn–ZnA–Zn), although the energy level of Zn–FbA–Zn was lower than that of Zn–ZnA–Zn. The DSSCs usin...

Journal: :Arhiv za higijenu rada i toksikologiju 2012
Višnja Oreščanin Ivanka Lovrenčić Mikelić Robert Kollar Nenad Mikulić Gordana Medunić

In this study we compared three methods for the treatment of electroplating sludge highly loaded with zinc and iron: (1) calcium oxide-based solidification/stabilisation; (2) conversion into inert material by adsorption of organic and inorganic pollutants onto activated carbon; and (3) conversion of mobile waste components into insoluble phosphates. All three methods proved highly efficient in ...

Journal: :Molecular cell 2008
Morgan L Maeder Stacey Thibodeau-Beganny Anna Osiak David A Wright Reshma M Anthony Magdalena Eichtinger Tao Jiang Jonathan E Foley Ronnie J Winfrey Jeffrey A Townsend Erica Unger-Wallace Jeffry D Sander Felix Müller-Lerch Fengli Fu Joseph Pearlberg Carl Göbel Justin P Dassie Shondra M Pruett-Miller Matthew H Porteus Dennis C Sgroi A John Iafrate Drena Dobbs Paul B McCray Toni Cathomen Daniel F Voytas J Keith Joung

Custom-made zinc-finger nucleases (ZFNs) can induce targeted genome modifications with high efficiency in cell types including Drosophila, C. elegans, plants, and humans. A bottleneck in the application of ZFN technology has been the generation of highly specific engineered zinc-finger arrays. Here we describe OPEN (Oligomerized Pool ENgineering), a rapid, publicly available strategy for constr...

2018
Agnieszka Baran Jerzy Wieczorek Ryszard Mazurek Krzysztof Urbański Agnieszka Klimkowicz-Pawlas

The aims of this study were to investigate zinc content in the studied soils; evaluate the efficiency of geostatistics in presenting spatial variability of zinc in the soils; assess bioavailable forms of zinc in the soils and to assess soil-zinc binding ability; and to estimate the potential ecological risk of zinc in soils. The study was conducted in southern Poland, in the Malopolska Province...

Dye sewage is dangerous problem in our environmental aquatics that cause generation of harmful effects for living organism. In this work, because of simplicity, easy operation, high efficiency and no creating secondary pollutants, ultra sound radiation applied for degradation of a synthetic dye, methyl orange using zinc sulfide nano particles decorated on carbon nanotubes as nanocatalyst. ZnS/C...

Journal: :Electrochimica Acta 2021

This work aims to identify a suitable electrolyte composition for the operation of zinc–nickel flow cell at ambient temperature. The effect varying containing KOH, ZnO, tetraethylammonium hydroxide (TEAH) or tetrabutylammonium bromide (TEAB) additives are investigated. A 15 mM concentration TEAH is found provide smooth and compact zinc depositions. Increasing concentrations KOH be detrimental v...

In this research work, solvent extraction and stripping of zinc ions from a Zn-Mn-Cd-bearing solution was investigated using D2EHPA as the extractant in a chloride medium. The efficiency of the extraction and stripping stages was evaluated separately, and different parameters such as the pH, extractant concentration, reaction temperature, and contact time were studied. Based on the results obta...

Journal: :international journal of environmental research 2010
j. nouri a.h. mahvi e. bazrafshan

in this study, the performance of electro-coagulation in combination with aluminum sacrificial anode, in removal of zinc and copper has been investigated. several parameters, such as pollutant concentration, ph, electrical potential, cod, turbidity and contact time were studied to achieve a higher removal capacity. variable concentrations (5-50-500 ppm) of zinc and copper solutions were prepare...

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