Results 11 to 20 of about 8,128 (210)
Molecules, 1997 The ultraviolet spectra of heterocyclic N-oxides of pyridine N-oxide series and the conjugated cationic acids (simple cations of protonated N-oxides) in acetonitrile as the representative of polar aprotic solvents, were determined.
Lech Chmurzynski
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The Antioxidant Capability of Higenamine: Insights from Theory
Antioxidants, 2020 Density functional theory was employed to highlight the antioxidant working mechanism of higenamine in aqueous and lipid-like environments. Different reaction mechanisms were considered for the reaction of higenamine with the •OOH radical.
Isabella Romeo +5 more
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Spectrophotometric determination of the acidity constants of calcon in water and mixed water–organic solvents [PDF]
Journal of the Serbian Chemical Society, 2009 The acid–base properties of calcon (1-(2-hydroxy-1-naphthylazo)-2-naphthol-4-sulfonic acid) in water and mixed water–organic solvents at 25 °C at an ionic strength of 0.10 M are studied by a multiwavelength spectrophotometric method. The organic solvents
MOHAMMAD MAZLOUM-ARDAKANI +4 more
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The Molecule of the Week: A Didactic Tool for Teaching General Chemistry
CHIMIA, 2020 The molecule of the week is regularly used by the author in his first-semester course General Chemistry I (Inorganic Chemistry) to illustrate, exemplify, and deepen fundamental aspects and concepts treated in the course.
Antonio Togni
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Acid-Base Chemistry of White Wine: Analytical Characterisation and Chemical Modelling
The Scientific World Journal, 2012 A chemical model of the acid-base properties is optimized for each white wine under study, together with the calculation of their ionic strength, taking into account the contributions of all significant ionic species (strong electrolytes and weak one ...
Enrico Prenesti +3 more
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Membranes, 2019 We synthesized anion exchange polymers by a reaction of chloromethylated poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) with strongly basic 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). TBD contains secondary and tertiary amine groups in the guanidine portion.
Riccardo Narducci +5 more
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Fluorescence and photostability studies of anthracene-9-carboxylic acid in different media
International Journal of Photoenergy, 2000 Electronic absorption and fluorescence spectra of anthracene-9-carboxylic acid (ANCA) were studied in different homogeneous solvents, binary protic/aprotic solvent mixtures and in heterogeneous solutions of the cationic cetyltrimethyl ammonium bromide ...
M. S. A. Abdel-Mottaleb +6 more
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Computer-controlled potentiometric acid-base titrations
CHIMIA, 1973 A system has been developed for computer-controlled potentiometric acid-base titrations consisting of a HP 2114 B computer, a DM 2022 S digital voltmeter and further peripheral devices.
Urs Keller +3 more
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Polyprotic Acids and Beyond—An Algebraic Approach
Chemistry, 2021 For an N-protic acid–base system, the set of nonlinear equations (i.e., mass action and balance laws) provides a simple analytical solution/formula for any integer N ≥ 1.
Harald Kalka
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Measurement and Modeling of Liquid-Liquid Equilibrium Data of the Ternary system (Water + Butyric Acid + MethylCyclohexanol) at 293.2 K [PDF]
شیمی کاربردی روز, 2021 In this research, phase equilibria of the ternary system (water + butyric acid + methylcyclohexanol) was investigated and experimental data of liquid-liquid equilibrium were obtained at 293.2 K and ambient pressure.
Sina Shekarsaraee, Bahareh Bussary
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