scholarly journals Some experimental data on the heats of combustion of benzoic acid and carbon (graphite)

1944 ◽  
Vol 33 (6) ◽  
pp. 439 ◽  
Author(s):  
E.J. Prosen ◽  
F.D. Rossini
Keyword(s):  
Experimental Data ◽  
Benzoic Acid ◽  
Heats Of Combustion

Absorption spectra of benzoic acid in water at different pH and in the presence of salts: insights from the integration of experimental data and theoretical cluster models

2020 ◽  
Vol 22 (9) ◽  
pp. 5046-5056 ◽  
Author(s):  
Natalia V. Karimova ◽  
Man Luo ◽  
Vicki H. Grassian ◽  
R. Benny Gerber
Keyword(s):  
Experimental Data ◽  
Electronic Structure ◽  
Benzoic Acid ◽  
Absorption Spectra ◽  
Aqueous Media ◽  
Small Cluster ◽  
Cluster Models ◽  
Microscopic Interpretation

The microscopic interpretation of the electronic structure and absorption spectra of BA in aqueous media through calculations restricted to small cluster models.

scholarly journals THERMODYNAMIC PROPERTIES OF ORGANIC ACIDS AND SOME THEIR DERIVATIVES

2019 ◽  
Vol 62 (11) ◽  
pp. 38-45
Author(s):  
Vitaly V. Ovchinnikov ◽  
Alexey A. Kulakov ◽  
Irina G. Grigor′eva ◽  
Svetlana A. Maltseva
Keyword(s):  
Experimental Data ◽  
Organic Acids ◽  
Gas Phase ◽  
Thermodynamic Functions ◽  
Bond Energies ◽  
Additional Material ◽  
Electron Pairs ◽  
Valence Electrons ◽  
Heats Of Combustion

The heats of vaporization, combustion, formation, entropy and the heat capacities in different phases of different carbonic acids and their derivatives: acetates, esters with fatty radicals, two-, three- and four-basic acids (52 compounds) were analysed in the framework of one-parametric mathematic equations. The experimental data of all chosen one-, two-, three- and four-basic acids were analyzed. It was determined, that all thermodynamic functions of these types of compounds depend on the number of valence electrons N, from which the sum of lone electron pairs g as represented in the equations Δvap,c,fH° = i ±  f (N-g) and S°(Cp) = i ±  f (N-g) is excluded. The coefficients f in the first equations is in the range of 104-113 kJ mol-1 electron-1, that corresponds to the same values f in the equations, which are mentioned in our earlier papers on the determination of the heats of combustion of organic acids. As concerned of coefficient i in the received equations, necessary to note that situation is not synonymous as with the coefficient f. The magnitudes of this coefficient are different in the equations of vaporization, combustion, formation also as in the equations of entropy and the heat of capacity. On the base of literary experimental data we calculated the 29 new equations, which can be used for the calculation of the same thermodynamic functions for other new organic acids and especially bioorganic substances with the useful properties. Necessary to add, that the received equations can serve as additional material for the calculation of the bond energies of fatty acids and their derivatives in gas phase.

Computing Method and Test on IC50 Value of Tyrosinase Inhibition

2014 ◽  
Vol 1033-1034 ◽  
pp. 12-17
Author(s):  
Sheng Zhao Gong ◽  
Qing Sheng Chen ◽  
Men Yi Xu
Keyword(s):  
Experimental Data ◽  
Benzoic Acid ◽  
Competitive Inhibitor ◽  
Inhibitor Concentration ◽  
Tyrosinase Inhibition ◽  
Calculating Method ◽  
Ic50 Value ◽  
Noncompetitive Inhibitor ◽  
Kinetics Of ◽  
Computing Method

Calculating methods of inhibitor concentration leading to yield 50% inhibition (IC50) of competitive inhibitor, noncompetitive inhibitor and mixed inhibitor were proposed on the basis of kinetics of enzyme inhibition, and were applied to calculate IC50 value of concerned compounds, such as cinnamic acid, cinnamaldehyde, benzoic acid and et al. The calculating results of competitive inhibitor, noncompetitive inhibitor and mixed inhibitor are similar to experimental data, and the average errors are only 3.7%, 2.4%, 4.6%, respectively. The calculating method is confirmed to be reliable by the results.

scholarly journals Mass transfer between a fluid and an immersed object in liquid-solid packed and fluidized beds

2005 ◽  
Vol 70 (11) ◽  
pp. 1373-1379 ◽  
Author(s):  
Nevenka Boskovic-Vragolovic ◽  
Danica Brzic ◽  
Zeljko Grbavcic
Keyword(s):  
Experimental Data ◽  
Mass Transfer ◽  
Benzoic Acid ◽  
Fluidized Beds ◽  
Liquid Velocity ◽  
Spherical Particles ◽  
Flowing Water ◽  
Transfer Rates ◽  
Transfer Data ◽  
Dissolution Method

The mass transfer coefficient between fluid and an immersed sphere in liquid packed and fluidized beds of inert spherical particles have been studied experimentally using a column 40 mm in diameter. The mass transfer data were obtained by studying the transfer of benzoic acid from the immersed sphere to flowing water using the dissolution method. In all runs, the mass transfer rates were determined in the presence of inert glass particles 0.50-2.98 mm in diameter. The influence of different parameters, such as: liquid velocity, particles size and bed void age, on the mass transfer in packed and fluidized beds is presented. The obtained experimental data for mass transfer in the packed and particulate fluidized bed were correlated by a single correlation, thus confirming the similarity between the two systems.

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