dissociation constants
Calculation of acid dissociation constants
... A computational method has been developed for the determination of dissociation constants of acids (and bases). The method is applicable to mono or polybasic acids and, in certain cases, to mixtures of ...
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Potentiometric Study of Dissociation Constants of Dihydroxybenzoic Acids at Reduced Ionic Strengths and Temperatures
... decreasing dissociation constants with increasing ionic strength, at least at low to moderate ionic strengths [16], and it is not immediately clear why this trend is not more convincingly manifested in the ...
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Distinctive Routs:Electrochemical and Spectrophotometric Studies and Dissociation Constants Determination of Some Aminopyridine Azo-Dye Derivatives in Aqueous Media
... acid dissociation constants of the pyridine azo compounds (I-IV) were calculated from the titration curves of the mineral acid of hydrochloric acid with sodium hydroxide solution in absence as well as in ...
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Determination of the dissociation constants of some newly synthesized derivatives of 1,2,4-triazoline-3-thione in sodium hydroxide media
... In accordance with the Beer's law, the con- centrations of the neutral and the dissociated forms were calculated from the calculated values of the molar absorption coefficients and from the absorb- ances at the selected ...
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CALCULATION OF ACID DISSOCIATION CONSTANTS AND BIOLOGICAL ACTIVITIES IN SOME PYRIMIDINE DERIVATIVES AS KNOWN DRUG ACTIVE SUBSTANCE
... Acid dissociation constants (pKa) of some pyrimidine derivatives were determined experimentally with potentiometric titration method. All compounds were titrated potentiometrically with tetrabutylammonium ...
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Effect of Temperature and Solvent Composition on the Acid Dissociation Constants of 2 Pyrrol and 2 Thiophene Aldehyde Phenyl Sulphonyl Hydrazones
... Acid dissociation constants, pKa, of 2-pyrrolaldehyde phenylsulphonyl hydrazone, 1, and 2-thiophenealdehyde phenylsulphonyl hydrazone, 2, have been determined spec- trophotometrically in ethanol-water media ...
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Thermodynamics of the Second Dissociation Constants (pK2) of Piperazine N,N′ bis 2 hydroxypropanesulfonic Acid (POPSO Sesquisodium Salt) and Associated Thermodynamic Functions from (278 15 to 328 15) K
... acidic dissociation constants of protonated piperazine-N,N′-bis-2-hydroxypropane- sulfonic acid (POPSO sesquisodium salt) have been determined at 12 different temperatures from ...
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Dissociation Constants of Para Substituted Benzoic Acids in Alcoholic Solutions
... DISSOCIATION CONSTANTS OF PA T\A SUBSTITUTED BENZOIC AC IDS IN ALCOHOLIC SOLUTIONS by William Bradley Le\vis In partial fulfillment of the requirements for the degree of Doctor of Philosophy Californi[.] ...
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Thermodynamic parameters including acid dissociation constants for bromochlorophenols (BCPs)
... (2016) Thermodynamic parameters including acid dissociation constants for bromochlorophenols (BCPs).. http://researchrepository.murdoch.edu.au/29854/.[r] ...
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Dissociation constants of some naphthylamines and acenaphthenamines and their dimethyl derivatives
... is an acid weakening effect, beoauae the resulting mesomerism be extended through the aromatic nucleus and into the undiasociated carboxyl group... So far in the discussion of the amine [r] ...
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The thermodynamic dissociation constants of oxalic acid in water
... E represents th& •asu.red electromotive tore: o't tb.e cell... E0 the nomal electrode potential of the cell ll2.[r] ...
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The Thermodynamic Dissociation Constants of Azathioprine by the Nonlinear Regression and Factor Analysis of Multiwavelength Spectrophotometric pH Titration Data
... mixed dissociation constant of azathioprine—chemically 6-(3-methyl-5-nitroimidazol-4-yl)sulfanyl-7H- purine at various ionic strengths I of range ...thermodynamic dissociation con- stant p ...
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Spectrophotometric method of determination of dissociation constants of 2,5 dinitrophenol in ethanol water mixtures at 25±0 5ºC
... mixtures at 25±0.5 0 C temperature were determined spectrophotometrically. The pure indicator acid and potassium salt of indicator acid show maxima at 450 nm in the visible range. At first the spectrophotometric data ...
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The absorption spectra of lead halides in water methanol mixtures and the dissociation constants of intermediate ions
... nature of our lead oomplexes fronl conalueratlon of the absorption spectrum alone, otber than thot they are not.. Bjerrum lon-pairs, that is that they arc Illoleoular entities.[r] ...
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Acid Dissociation Constants and Related Thermodynamic Functions of Protonated 2,2 Bis(Hydroxymethyl) 2,2’,2” Nitrilotriethanol (BIS TRIS) from (278 15 to 328 15) K
... boratory. The cell voltage (emf) of the cell (A) for 16 solutions from (278.15 to 328.15) K corrected to 1 atm hydrogen partial pressure, is given in Table 1. At 298.15 K, agreement of the emf readings among the initial, ...
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Hantavirus N Protein Exhibits Genus-Specific Recognition of the Viral RNA Panhandle
... Specific recognition of the vRNA genome by viral nucleo- capsid protein is likely to be necessary for specific encapsida- tion of viral RNA and/or replication of viral genome. Recog- nition of vRNA by N requires the ...
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Potentiometric and Thermodynamic studies of p-nitro benzaldehyde and o-amino phenol and its metal complexes
... The dissociation constants of Schiff base (derived from p-nitro benzaldehyde and o-amino phenol) and metal-ligand stability constants of its complexes with some transition metal ions have been ...
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Download Download PDF
... For this purpose, we used three sets of flavonoid derivatives and their dissociation constants (pK d ), which describe flavonoid affinity toward P-glycoprotein (16-18). The best fitting models and the best ...
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The synthesis of novel pyrophosphate analogues and their antiviral activities
... Activity of methylenebisphosphonates and related compounds against influenza RNA polymerase.. Acid dissociation constants of inorganic pyrophosphoric acid and related compounds.[r] ...
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Spectrophotometric Determination of Acidity Constants of Thiamine in Water, Water-Triton X-100 Micellar Media Solutions
... The dissociation constants of the Thiamine were calculated with sectrophotometric titrations using a chemometric ...thermodynamics constants in comparison to the classical methods such as single ...
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