搜索结果: 1-15 共查到“化学 ions”相关记录27条 . 查询时间(0.093 秒)
A transferable ab-initio based force field for aqueous ions
transferable ab-initio force field aqueous ions Chemical Physics
2012/4/20
We present a new polarizable force field for aqueous ions (Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+ and Cl-) derived from condensed phase ab-initio calculations. We use Maximally Localized Wannier Fun...
SAC-CI Calculation of a Series of the Lowest 2-Pi-States of HCl+ and HBr+ Ions
diatomic molecule potential curves HCl+, HBr+ SAC-CI method
2012/2/29
The symmetry-adapted-cluster configuration interaction (SAC-CI) method is used for ab initio calculation of electronic structure of HCl+ and HBr+ molecular ions. Potential energy curves (PEC) are obta...
Determination of stability constants of 5-(2-hydroxybenzylidene)-2-thioxodihydropyrimidine-4,6(1H,5H)-dione with copper(II) and mercury(II) ions
Cu(II) and Hg(II) complexes 5-(2-hydroxybenzylidene)-2-thioxodihydropyrimidine-4,6(1H,5H)-dione spectrophotometry
2011/4/6
In this work, a hard model chemometric method was used to determine the stability constants of copper(II) and mercury(II) complexes with the newly synthesized ligand 5-(2-hydroxybenzylidene)- 2-thioxo...
A calorimetric study of the interaction of silver ions with jack bean urease
Urease silver ion isothermal titration calorimetry
2010/10/19
A thermodynamic study of silver ions by jack bean urease (JBU) was carried out at 2 temperatures, 27 and 37 °C, in Tris buffer (30 mM; pH 7.0) using isothermal titration calorimetry (ITC). There was a...
Chelating agent free solid phase extraction (CAF-SPE) method for separation and/or preconcentration of iron(III) ions
Iron determination solid phase extraction preconcentration
2010/10/15
This paper presents a chelating agent free solid phase extraction (CAF-SPE) method for the separation and/or preconcentration of trace iron(III) ions. This method is based on the sorption of Fe(III) i...
Spectrophotometric Determination of Trace Phosphate Ions by Amplitude-Modulated Flow Analysis Coupled with Malachite Green Method
Spectrophotometric Determination Trace Phosphate Ions
2010/9/14
An amplitude-modulated flow analysis coupled with lock-in detection is proposed for the determination of trace phosphate. The flow rate FS of sample solution is varied in response to a periodic signal...
MALDI Mass Spectrometry Using 2,4,6-Trihydroxyacetophenone and 2,4-Dihydroxyacetophenone with Cyclodextrins: Suppression of Matrix-related Ions in Low-molecular-weight Region
2,4,6-Trihydroxyacetophenone 2,4-Dihydroxyacetophenone Cyclodextrins
2010/9/14
Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry of a model peptide, Substance P (SubP), was carried out using 2,4,6-trihydroxyacetophenone (THAP) and 2,4-dihydroxyacetophenone (D...
Flame Atomic Absorption Spectrometry Determination of Trace Amounts of Nickel Ions in Water Samples after Ligandless Ultrasound-assisted Emulsification Microextraction
Flame Atomic Absorption Spectrometry Determination Trace Amounts Nickel Ions
2010/9/17
In the present work, a new ligandless-ultrasound-assisted emulsification microextraction (LL-USAEME) method was developed for preconcentration trace amounts of nickel as a prior step to its determinat...
Weak Binding of N-Alkylpyridinium Ions to Nonionic Surfactant Micelles as Studied by Capillary Zone Electrophoresis
N-Alkylpyridinium Ions Nonionic Surfactant Micelles Capillary Zone Electrophoresis
2010/9/20
The binding equilibrium of N-alkylpyridinium ions to nonionic surfactant micelles was investigated through the changes in the electrophoretic mobility of the alkylpyridinium ions in capillary zone e...
Flow Injection Determination of Iron Ions with Green Tea Extracts as a Natural Chromogenic Reagent
Iron Ions Green Tea Extracts Natural Chromogenic Reagent
2010/9/20
A green chemistry system that utilizes natural extract as an alternative reagent for determination of metal ions has been investigated. The extract of green tea, a common beverage, is used for quanti...
Flow-Injection On-line Electrochemical Separation/Determination of Ions Using a Two-Step Oil/Water-Type Flow Cell System
Flow-Injection On-line Electrochemical Separation/Determination a Two-Step Oil/Water-Type Flow Cell System
2010/9/19
A flow system for electrochemical separation and detection of ions was constructed by connecting two oil/water (O/W)-type flow cells, in which a long polarizable O/W interface was formed at the inner ...
Study of surface exfoliation on crystalline silicon induced by Co-implantation of He and H ions
crystalline Si He and H ion implantation surface blistering and exfoliation bubbles growth
2009/8/14
Crystalline n-type Si (100) wafers were implanted at room temperature with
160 keV He ions to a fluence of 5×1016cm－2 or 40 keV H ions to a fluence of 1×1016cm－2, singly or in combination, followed ...
Interaction of Mefenamic Acid with Cobalt(II) Ions in Aqueous Media: Evaluation via Classic and Response Surface Methods
Mefenamic acid cobalt Box-Behnken complexation classical method
2010/4/16
Mefenamic acid reacts with cobalt(II) ions in aqueous alkaline medium to form a highly stable deep brown complex at ambient temperature. The complexation process was optimized in terms of pH, temperat...
摘要 Experimental determination of density, ultrasonic velocity and viscosity of two pyrimidine bases thymine and cytosine along with their respective nucleosides, thymidine and cytidine has been carrie...
A Novel Degradable Adsorbent of the Hyperbranched Aliphatic Polyester Grafted Cellulose for Heavy Metal Ions
Hyperbranched aliphatic polyester graft cotton fiber adsorbent heavy metal ions
2010/4/16
A novel degradable adsorbent for the removal of heavy metal ions from waste water, a hyperbranched aliphatic polyester grafted cellulose (HAPE-Cell), was successfully prepared by the simple one-pot me...