The solubility and solubility product of europium trifluoride were measured by radiometric, potentiometric and conductometric
methods. There are significant differences in the values of both solubility and solubility product obtained by the three different
techniques. Due to reasons discussed in the text, radiometric values seem to be more acceptable than the others. The thermodynamic
functions such as ΔH0, ΔG0 and ΔS0 for the dissolution process were also measured. The positive values of ΔH0 and ΔG0 and the negative value of ΔS0 are indicative of the slight solubility of EuF3. The dependence of solubility on pH and also on the fluoride concentration has also been studied. It was confirmed that europium
forms a monofoluoride complex in aqueous solution. The stability constant of this complex was estimated.
Authors:Salaam W. Saleh, Susan E. Moreno-Molek, Druthiman Reddy Mantheni, Manik Pavan Kumar Maheswaram, Tobili Sam-Yellowe, and Alan T. Riga
Cytokines are secreted mostly by cells of the immune system. They are small regulatory proteins that participate in anti-inflammatory and pro-inflammatory processes in the body. Cytokines and their soluble
Authors:Hotma Partogi Pasaribu, Herman Hariman, R. Haryono Roeshadi, and Stephen C.L. Koh
molecules [ 6 ]. Adhesion molecules play a central role in endothelial cells–leukocytes adherence and the subsequent migration of leukocytes into perivascular tissue. Soluble vascular cell adhesion molecule-1 (sVCAM-1) was the first adhesion molecule to be
Authors:H. López-González, M. Jiménez-Reyes, M. Solache-Ríos, and A. Rojas-Hernández
Solubility product (Lu(OH)3(s)⇆Lu3++3OH−) and first hydrolysis (Lu3++H2O⇆Lu(OH)2++H+) constants were determined for an initial lutetium concentration range from 3.72·10−5 mol·dm−3 to 2.09·10−3 mol·dm−3. Measurements were made in 2 mol·dm−3 NaClO4 ionic strength, under CO2-free conditions and temperature was controlled at 303 K. Solubility diagrams (pLuaq vs. pCH) were determined by means of a radiochemical method using 177Lu. The pCH for the beginning of precipitation and solubility product constant were determined from these diagrams and both the first
hydrolysis and solubility product constants were calculated by fitting the diagrams to the solubility equation. The pCH values of precipitation increases inversely to [Lu3+]initial and the values for the first hydrolysis and solubility product constants were log10β*Lu,H = −7.92±0.07 and log10K*sp,Lu(OH)3 = −23.37±0.14. Individual solubility values for pCH range between the beginning of precipitation and 8.5 were SLu3+ = 3.5·10−7 mol·dm−3, SLu(OH)2+ = 6.2·10−7 mol·dm−3, and then total solubility was 9.7·10−7 mol·dm−3.
Authors:Leonel Vinicius Constantino, Douglas Mariani Zeffa, Alessandra Koltun, Mariana Ragassi Urbano, Alisson Wilson Santos Sanzovo, and Suzana Lucy Nixdorf
post-harvest processes, which contribute to the characteristic flavor and aroma of the beverage [ 5 , 7 – 9 ].
Carbohydrates are the main components of green, roasted, and soluble coffee, and they account for 50% of its dry matter, on average
Authors:A. Ebringerová, M. Kačuráková, Z. Hromádková, and J. Pružinec
The structural and solubility changes of a water-insoluble arabinoxylan with a low degree of branching was studied after -irradiation by IR spectroscopy and chemical analysis of the polysaccharide and its polymeric fractions.
Authors:M. Ambrová, J. Jurišová, V. Danielik, and J. Gabčová
The solubilities of lanthanum oxide in LiF, NaF, KF and eutectic melt LiF-NaF-KF (46.5 mole% LiF; 11.5 mole% NaF and 42.0
mole% KF) were measured in order to find the suitable electrolyte for electrodeposition of lanthanum. Solidus-liquidus lines
were obtained by the method of thermal analysis. The solubility of lanthanum oxide in alkali fluorides is rather low and decreases
in the order LiF>NaF>KF.
It was found that lanthanum oxide reacts with the components of the melt. LaOF and alkali metal oxide are formed during dissolution
of La2O3 in the melt.
Authors:E. Lee, J. Lim, D. Chung, H. Yang, J. Yoo, and K. Kim
This study was carried out to investigate the characteristics of an oxidative-dissolution of fission products (FP) when uranium
(U) is dissolved in a Na2CO3–H2O2 carbonate solution. Simulated FP-oxides which contained 12 components were added to the solution to examine their dissolution
behaviors. It was found that H2O2 was an effective oxidant to minimize the dissolution of FP. For the 0.5 M Na2CO3–0.5 M H2O2 solution, such elements as Re, Te, Cs, and MoO2 were dissolved with yields of 98 ± 2%, 98 ± 2%, 93 ± 2%, and 26 ± 3%, respectively, for 2 h. Among these components, Re,
Te, and Cs were completely dissolved within 10–20 min without regard to the concentrations of Na2CO3, and H2O2 due to their high solubility in the carbonate solution with and without H2O2. However, MoO2 was very slowly dissolved and its yield was 29 ± 3% for 4 h. The pH of the dissolved solution revealed the greatest influence
on the dissolution yields of the FP, exhibiting the most effective pH condition in the range of 10–12 in order to create a
considerable suppression of the co-dissolution of FP during the oxidative-dissolution of U.
Ringens, P. J., Hoenders, H. J., Bloemendal, H. (1982) Effect of aging on the water-soluble and water-insoluble protein in normal human lens. Exp. Eye Res. 34 , 201-207.
Effect of aging on the water-soluble and water
Authors:Róbert Víg, Péter Tamás Nagy, Attila Dobos, and János Nagy
-, t - és Welch-próbák. In: Biometria agrártudományi alkalmazásokkal. 164–168. Budapesti Corvinus Egyetem–Aula Kiadó Kft. Budapest.
Hong-Ling, L. et al., 2008. Effects of soluble organic N on evaluating soil N