نتایج جستجو برای: chemical salts

تعداد نتایج: 402708  

2011
Haitao Zhu Dongxiao Han Zhaoguo Meng Daxiong Wu Canying Zhang

In this article, a wet chemical method was developed to prepare stable CuO nanofluids. The influences of synthesis parameters, such as kinds and amounts of copper salts, reaction time, were studied. The thermal conductivities of CuO nanofluids were also investigated. The results showed that different copper salts resulted in different particle morphology. The concentration of copper acetate and...

Journal: :Dalton transactions 2010
Annemarie Schäfer André Schäfer Thomas Müller

2-Silaimidazolium ions and 2-silaimidazolidinium ions were synthesized by Lewis acid-base adduct formation between N-heterocyclic silylenes and silyl arenium ions. They were isolated in high yields as their [B(C(6)F(5))(4)](-) salts. These salts are stable at room temperature and were characterized by NMR spectroscopy supported by the results of density functional computations of molecular stru...

2013
Ahmed A. El-Henawy Manal M. Khowdiary Abdelfattah B. Badawi Hussein M. Soliman

Anti-leukemia screening of previously prepared isothiouronium and quaternary salts was performed, and some salts exhibited promising activity as anticancer agents. Quantum chemical calculations were utilized to explore the electronic structure and stability of these compounds. Computational studies have been carried out at the PM3 semiempirical molecular orbitals level, to establish the HOMO-LU...

2017
Yansheng Li Zhigang Liu Ying Wang Yunze Hui

The aim of the chapter is to introduce a new technology using the flow-divided electrodes for sewage reclamation based on redox and concentrating ions. This creative system can be used directly for sewage treatment without the need for costly ion-exchange membranes and other chemical reagents. Under experimental condi‐ tions, the removal percentage of TDS (total dissolved salts) is 83 %and the ...

2012
Janna Hastings Paula de Matos Adriano Dekker Marcus Ennis Venkatesh Muthukrishnan Steve Turner Gareth Owen Christoph Steinbeck

ChEBI is an ontology of chemical entities of biological interest. It includes a structure-based and a role-based classification of chemical entities including molecules, ions and salts. This poster showcases recent developments and forthcoming enhancements to the ontology, focusing on modular extensions of the content. These extensions are being developed in support of error detection and consi...

2012
Joachim Axhausen Geraldine Rühl Andreas Kornath

Dithiocarbamic acid reacts in the superacidic media HF/MF5 (M = As, Sb) under formation of the corresponding salts H2NC(SH)2 MF6. The colorless compounds are stable in an inert gas atmosphere up to−20 ◦C. The salts have been characterized by NMR, IR and Raman spectroscopy. Reactions in DF/AsF5 were carried out to obtain D2NC(SD)2 AsF6 in order to confirm the assignments of the observed vibratio...

2006
N. R. Amundson A. Caboussat J.-W. He J. H. Seinfeld K.-Y. Yoo

A general equilibrium model for multiphase multicomponent inorganic atmospheric aerosols is proposed. The thermodynamic equilibrium is given by the minimum of the Gibbs free energy for a system involving an aqueous phase, a gas phase and solid salts. A primal-dual algorithm solving the Karush-Kuhn-Tucker conditions is detailed. An active set/Newton method permits to compute the minimum of energ...

Journal: :The Journal of antibiotics 1991
B Pirotte J Delarge J Coyette J M Frere

Newly synthesized 5-acylaminothiazolium salts and one 5-acylaminothiazolidine, considering their chemical structure and reactivity, have been proposed as potential inhibitors of bacterial serine DD-peptidases. A moderate antibiotic activity with (5-phenylacetylamino-3-thiazolio)acetate and (5-phenylacetylaminothiazolidin-3-yl)acetic acid was observed on Staphylococcus aureus ATCC 25923. The met...

Journal: :Environmental pollution 2006
Domenico Sanzo Stephen J Hecnar

Vast networks of roads cover the earth and have numerous environmental effects including pollution. A major component of road runoff in northern countries is salt (mostly NaCl) used as a winter de-icing agent, but few studies of effects of road salts on aquatic organisms exist. Amphibians require aquatic habitats and chemical pollution is implicated as a major factor in global population declin...

Journal: :Soft matter 2014
Meina Wang Yilin Wang

Coacervation is a phenomenon in which a colloidal dispersion separates into two immiscible liquid phases: a liquid rich in colloidal phase in equilibrium with another diluted liquid phase. Surfactant coacervation here refers to coacervation whose main components are surfactants with low molecular weights. Over the past two decades, surfactants have been greatly developed and studies on coacerva...

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