acid dissociation constants of phenols in aqueous solution
Chemical of alumina reactions in aqueous solution and its application in water treatment
... water interface 3.3.3.3 Dissolution of alumina Dissolution of alumina should also be taken into consideration when discussing the properties of alumina in aqueous solution Dissolution of alumina ... charge of alumina changes from positive to negative with increasing pH The surface charge density of alumina particles and the dissociation of acidic groups of humic acid are enhanced by increasing ... depends on the pH of aqueous solution, typically increases at both acidic pH, below the pH of zero point of charge of metal oxide and in the alkaline region The process of dissolution takes place...
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Báo cáo hóa học: " The Fabrication of Nano-Particles in Aqueous Solution From Oxyfluoride Glass Ceramics by Thermal Induction and Corrosion Treatment" pdf
... (DTA) Using DTA equipment (TA-Inst 2100), samples were held in a Pt crucible and analysed against a calcined Al2O3 reference at a heating rate of 20 °C min-1.The nano-particles in aqueous solution ... nano-particles in aqueous solution have the same luminescent properties as those existing in glass host From a practical point of view, it is possible for the nano-particles in aqueous solution from ... bio-distribution of the drug The nanoparticles in aqueous solution from the GC-host also apply in non-invasive imaging by detecting the luminescence of nano-particles inside biological systems, like cells,...
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Báo cáo vật lý: "Electrochemical Studies of Mild Steel Corrosion Inhibition in Aqueous Solution by Uncaria gambir Extract" doc
... concentrations Specimens in duplicate were immersed for a period of days in 100 ml, pH aqueous solutions containing various concentrations of the studied inhibitors The mass of the specimens before ... samples were obtained from Medan Province, Indonesia The gambir cubes were grinded into fine powder and sieved with a 50-µm mesh Initially, g of powdered gambir were dissolved in 80°C distilled ... growing trend in the use of natural products such as leaves or plant extracts as corrosion inhibitors for metals in acid cleaning processes This study was done to evaluate the inhibitive effect of...
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The development and study of titanium dioxide based buoyant composite photocatalyts for improved applications in photocatalytic degradation of organic pollutants in aqueous solutions
... most of the surfaces being still exposed, meaning that increasing the deposited Pt amount on TiO2 may not necessarily result in the increase of the photoactivity of TiO2 The deposition of silver ... AcOH Acetic acid BE Binding energy BET Barrett-Joyner-Halenda C Concentration of the reactant or the target contaminant c Speed of light in air, 299,792,458 m/s C0 Initial concentration of the reactant ... DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE 2012 Acknowledgement First of all, I would like to thank my supervisor Prof Bai...
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Study in the preparation of poly (4 vinylpyridine) based nanoparticles and their application as an effective adsorbent for the recovery of palladium from aqueous solutions
... been gaining increasing popularity in recent years, including in environmental applications However, in spite of their great potentials and versatilities, practical engineered applications of nanomaterials ... (≡FeOH2+1/2, ≡Fe3OH+1/2), depending on the solution pH and the intrinsic point -of- zero-charge (pHpzc) of these binding sites Heavy metal ions in contact with these binding sites will be adsorbed and ... direct leaching of palladium which is nonbiodegradable into the aqueous environment is also a concern, especially in view of the recent interest in deploying the possibility of using palladium-catalyzed...
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Growth and p doping of zinc oxide nanostructures and films in aqueous solution
... Logarithm of rod density (cm-2) plotted against the total concentration of zinc ions in the precursor solution The inset shows the corresponding initial degree of supersaturation of zinc in the ... the growth of ZnO nanorods and films in aqueous solution using zinc acetate and ammonium hydroxide in detail Regardless of the type of substrate used, the solubility of zinc (SZn), interface properties ... Firstly, the intrinsic doping concentrations in undoped ZnO single crystals is about five orders of magnitude less than those in polycrystalline ZnO This large difference of intrinsic doping concentrations...
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Measurement of OH Radicals in Aqueous Solution Produced by Atmosphericpressure LF Plasma Jet
... fluorescence intensity of HTA is independent of pH in the range of 6-11 Since TA (Aldrich) does not dissolve in acidic/neutral liquid, aqueous solution of TA was prepared by dissolving TA in the distilled ... density in the solution as a function of treatment time as shown in Fig.7 The concentration of OH radicals in the cuvette almost linearly increases with increasing the time Besides trapping of OH ... reactions as a function of the concentration of LAS aqueous solution Regardless of the initial concentration of LAS in the solution, the degradation rate is about 60 % According to [14], it is considered...
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The effects of chloride ions on the hydrogen gas generation and TCE degradation in aqueous solutions containing zero valent iron
... shown in figure The profiles for the generation of hydrogen gas in the solution containing TCE had the similar properties compared with the one in the solution having iron only In the solution ... Thesis for the Degree of Master of Science in Engineering The Effects of Chloride Ions on the Hydrogen Gas Generation and TCE Degradation in Aqueous Solutions Containing Zero Valent Iron By ... decrease of degradation rate constants The hydrogen gas generation of iron in the anaerobic aqueous solutions was also determined It depended on solution pH, the presence of electron receiving competitor...
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Removal of Cadmium from Aqueous Solutions by Charcoals Prepared from Giant Reed (Arundo donax)
... indicating that the pH value was rapidly increased with time in each case at the beginning, and the concentration of cadmium in the solution was decreased The alkaline metal oxides and alkaline-earth ... value of the solution for two cases with different dosage of adsorbent, whereas the initial concentration of cadmium and the volume of solution were the same The results are shown in Fig 2, indicating ... Journal of Water and Environment Technology, Vol 8, No.4, 2010 Removal of cadmium from aqueous solutions For estimating the removal rate, time courses of cadmium concentration in aqueous solution...
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Recovery of acetonitrile from aqueous solutions using zeolitic imidazolate framworks
... purify acetonitrile thus needs to be determined in order to meet the dual goals of attaining economical solvent consumption and increasing industrial ecofriendliness This project thus aims to discern ... producers of acetonitrile are largely segmented A few major players account for up to 60% of global capacity, including INEOS in the United States, Asahi Kasei in Japan and CNPC Jilin Chemical Group in ... from aqueous solutions to circumvent possible future supply disruption from interfering with essential industrial and laboratory work The separation of acetonitrile from aqueous solutions using...
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Nanoparticle tracking in aqueous solution
... TRACKING IN AQUEOUS SOLUTION NANDHINI ELAYAPERUMAL (M.Tech, ANNAMALAI UNIVERSITY, INDIA) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ENGINEERING ... however, was in agreement with the measurement obtained from dynamic light scattering This indicates that (i) particle-tracking is a promising tool in determining the behaviour of particles in solution, ... is done by inserting confocal imaging aperture (usually two) and limiting the illumination to a single point to capture a particular section of the sample The illumination of single point is illustrated...
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Removal of phenol from aqueous solutions by adsorption onto organomodified
... carried out by adding various concentrations (in the range of 0.01–0.20 M) of NaCl, Na2 SO4 and NaNO3 solutions individually, in 110 mg L−1 of phenol solutions containing 10 g L−1 of organobentonite ... than unity The values of Kf and 1/n are determined from the intercept and slope of linear plot of ln qe versus ln Ce , respectively In order to investigate the effect of initial phenol concentration ... adsorption kinetics (mg g−1 (7) min−1/2 ) where kid is the rate constant of intraparticle diffusion model The values of kid and c can be determined from the slope and intercept of the straight line of...
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Báo cáo Y học: Structure of human immunodeficiency virus type 1 Vpr(34–51) peptide in micelle containing aqueous solution pptx
... package NDEE (SpinUp Inc., Dortmund, Germany) Structure calculation was performed using XPLOR 3.851 and a modified ab initio simulated annealing protocol including floating assignment of prochiral ... incorporation [26] are lined up on one side of the helix (Fig 2C) Multiple sequence alignment of amino acids 34–51 of HIV-1 Vpr with sequences of all HIV-1, HIV-2 and SIV isolates deposited in ... localization [18] Mutation of Phe34 to Ile abolishes Vpr binding to importin-a and nucleoporins Vpr residues 25–40 were reported to contain essential interaction sites for HHR23A binding [32] A Vpr construct...
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Báo cáo khoa học: "Efficacy of nano-hydroxyapatite prepared by an aqueous solution combustion technique in healing bone defects of goat" docx
... Mapra India, India) and injectable meloxicam (0.5 ml once daily for days; Intas Pharmaceuticals, India) with daily dressing changes of the surgical wounds Local inflammatory reaction and healing of ... tissues Healing was uneventful in all animals and there was no evidence of rejection of the implant in any case The clinical features of the present study corroborated the findings of Holmes et ... matrix combination in rabbit Indian Veterinary Research Institute MV Sc Thesis, Izatnagar, India, 1998 36 Summers BN, Eisenstein SM Donor site pain from the ileum A complication of lumbar spine fusion...
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Phosphate removal from aqueous solutions using red mud wasted in bauxite Bayer's process
... c, Fig The influence of the initial concentration on the PO] Cmg/] ] removal(~-OPh, ~ -TPPh), initial PO] concentration in aqueous solutions up to 50 mg/1, contact time - min, a dose of red mud ... a binding agent in synthetic detergent production thus being a source for water pollution To a 50 ml water sample, with the preliminary concentration of PO43 determined, a fixed quantity of red ... phase remaining after acid suspension separation was used for investigations on the clarification of turbid waters [11,12] The model aqueous solutions with determined concentrations of potassium...
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Báo cáo y học: "Growth of Microorganisms in Total Parenteral Nutrition Solutions Without Lipid"
... (volume) Amino acids Glucose Fructose Xylitol Na+ K+ Mg2+ Ca2+ － Cl － SO42 － Acetate － Gluconate 3－ Citrate P Zn Vitamin B1 Vitamin B2 Vitamin B6 Vitamin B12 Vitamin C Folic acid Nicotinamide Biotin ... difference in the mean values of the strains All strains of B cereus did not increase in NP1 for 48 hours (Figure 1c), and there was a significant decrease (p
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Risk Assessment of Fenthion Oxide Derivatives in Aqueous Environment
... and Ventura F (2001) Monitoring of pesticides in drinking and related waters in NE Spain with a multiresidue SPE-GC-MS method including an estimation of the uncertainty of the analytical results, ... 30 40 50 60 Incubation time (min) Fig - Formation of MPP metabolites by CYP3A4 up to an incubation time of 60 The molarity of MPP (10 M) at the beginning of the reaction was defined as 100% ... participation of human hepatic P450 isomers, flavin-containing monooxygenases ans aldehyde oxidase in the biotransformation of the insecticide fenthion, Toxicol Appl Pharmacol., 233, 343-352 Quintana...
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A study of difficulties in learning english listening skill for beginners in the asemlink of intrernational languages center and some suggested solutions
... for beginners in learning English listening skills in the Asemlink of international languages center? Why beginnesr find it difficult to learn listening to English in the Asemlink of international ... MINISTRY OF EDUCATION AND TRAINING VINH UNIVERSITY - - PHAN HUONG GIANG A STUDY OF DIFFICULTIES IN LEARNING ENGLISH LISTENING SKILL FOR BEGINNERS IN THE ASEMLINK OF INTERNATIONAL ... listening, speaking, reading and writing As an English teacher, with her own knowledge and experience in teaching, the author finds interested in studying the difficulties in learning the listening...
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