ABSTRACTWe investigated the effect of different phosphate salts on the structural integrity of micellar casein (MC) at pH 7.0. With the increase of salt concentration, a reduction in turbidity was observed for the MC solutions, and it was modeled using an exponential decay function. The inflecti...
Prussian Blue (PB)-modified graphite screen-printed electrodes are increasingly being used in electrochemical biosensors. However, they do not allow the observation of the electrochromism of PB. This work presents the construction of PB-based, electrochromic screen-printed biosensors. Although e...
In this paper, a heterometallic polyoxometalate Cs4H2PMo11FeO40·6H2O with Keggin structure was prepared and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM) images. The as-prepared poly...
Injection of CO2 into saline storage aquifers is often accompanied by drying of the formation water and salt precipitation. Subsequent salt clogging of a well bore and the near wellbore rock matrix may lead to injectivity impairment. In this paper we present medium-scale experiments on salt prec...
All-electron MRD CI calculations are reported for various core-ionized and core-valence excited states of N2 using a diagonalization technique which is capable of extracting arbitrarily high roots of large secular equations. The computations are carried out in a delocalized framework so that ger...
Spatial database operations are typically performed in two steps. In the filtering step, indexes and the minimum bounding rectangles (MBRs) of the objects are used to quickly determine a set of candidate objects. In the refinement step, the actual geometries of the objects are retrieved and comp...
Analysis by high-performance liquid chromatography of the carbohydrate fraction of sirups obtained from the fast pyrolysis of Avicel cellulose (82% yield of organic liquid) indicated the presence of a considerable amount of an unknown oligosaccharide, presumably a disaccharide. If this was forme...
Rates of dissociation of tris-(2,2′-bipyridine) iron(II) sulphate have been determined in HCl, H2SO4, HClO4 and HNO3 in aqueous and heavy water media at acid concentrations varying from 10−3M to 3M and at different temperatures. The rates converge to the same lower limit at [H+] below 10−2M and...
Both monovalent cations and anions show a regular gradation, according to their sizes, in their effect on the rate and the activation parameters for the dissociation of tris(2,2′-bipyridine)-Fe(II) complex in acid. ΔS and ΔH of activation in M, 0.1 M and 0.01 M acid decrease in the order Cl− ...
The rates of dissociation of tris(2,2′bipyridine)Fe(II) tris-(1,10-phenanthroline)Fe(II) complexes are lower in D2O at 1.0 and 0.01 N HCl, by about 10-20% Gibb's free energy of activation in all the cases is higher in D2O. Differencies in enthalpy and entropy of activation are insignifican...
The electrode processes of tris(2,2′-bipyridine)iron(II) and tris(2,2′-bipyridine)iron(III) complexes at the rotated platinum electrode and the dropping mercury electrode (dme) in acetonitrile solutions have been investigated by the measurement of current/potential curves, dc and ac polarogram...
Two new Ru(II) complexes [RuH(HL)(PPh3)2(CO)] (1) and [RuH(HL)(AsPh3)2(CO)] (2) (HL = 2,2′-bipyridine-5,5′-dicarboxylic acid) were synthesized and characterized by analytical and spectral methods. X-ray diffraction was additionally used to characterize 1 in solid state which disclosed a distor...
The kinetics of alkaline hydrolysis of tris(2,2′-bipyridine)iron(II) complex have been studied in the presence of various alcohols of different chain lengths and number of OH groups in aqueous and SDS micellar medium. In aqueous medium, rate increases at all percentages of 1-alkanols in the fol...
2,2′-Bipyridines containing two β-maltoside, β-lactoside, or β-isomaltoside appendages were prepared and successively complexed with ferrous ion to afford hexavalent glycoclusters having tris-bipyridine ferrous complex cores. Each of these metalloglycoclusters showed unique UV–vis and CD sp...
Electronic systems with on-demand dissolution or destruction capabilities offer unusual opportunities in hardware-oriented security devices, advanced military spying and controlled biological treatment. Here, the dissolution chemistry of gold, generally known as inert metal, in potassium ferricy...
The main purpose of the present work is to improve the understanding of an industrial process that exploits the synergic action of cyanide ion and three-nitrobenzene-sulphonate for the selective removal of precious metals from various matrices. It has been observed that the cyanide dissolves fir...
Gold-bearing ores, especially the sulphidic ones, are often treated by flotation prior to cyanidation. Following flotation process, the flotation concentrate or tailings are redirected to the cyanidation circuit for gold extraction that may contain appreciable amounts of collector used in flotat...
Crown ethers (i.e. [2,4]-dibenzo-18-crown-6 (DBC), 18-crown-6, 15-crown-5 and 12-crown-4) show obvious co-catalytic effect for alkali halides catalyzing one-step synthesis of dimethyl carbonate (DMC) from CO2, propylene oxide and methanol. Especially, the DMC yield of KCl catalyst promoted by DB...
The protonated adrenaline (PAd+) forms supramolecular complexes with crown ethers by extensive hydrogen bond and ion–dipole interactions. Recent experiments and calculations have demonstrated the molecular recognition of PAd+ through the supramolecular complexes formed between 12-crown-4 (12C4)...
ICT based ratiometric sensing due to H-bonding interaction among three different crown ethers (C): Dibenzo-24-crown-8 (DB24C8 or C1), Benzo-15-crown-5 (B15C5 or C2) and 4′-Nitrobenzo-15-crown-5 (4′–NB15C5 or C3) along with the axle bis(benzimidazolium)propane borontetrafluoride (BBIM-propane)...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View