Temperature for the upper limit of complex formation for n-hexane, n-heptane, n-octane, and n-decane in binary mixtures

1967 ◽  
Vol 3 (1) ◽  
pp. 14-16
Author(s):  
V. A. Matishev
Keyword(s):  
Complex Formation ◽  
Binary Mixtures ◽  
Upper Limit

Upper limit of urea complex formation with n-heptane in the presence of n-1-heptene

1975 ◽  
Vol 11 (2) ◽  
pp. 97-98
Author(s):  
T. A. Volkova ◽  
I. D. Makhinya ◽  
A. I. Bogatova ◽  
V. A. Matishev
Keyword(s):  
Complex Formation ◽  
Urea Complex ◽  
Upper Limit

Examination of the inert solvent assumption in the ideal associated solution model. Enthalpy of chloroform–triethylamine complex dissociation

1989 ◽  
Vol 67 (7) ◽  
pp. 1153-1157 ◽  
Author(s):  
John F. Smith ◽  
Loren G. Hepler
Keyword(s):  
Complex Formation ◽  
Binary Mixtures ◽  
Excellent Agreement ◽  
Binary Systems ◽  
Solution Model ◽  
Ideal Associated Solution Model ◽  
Inert Solvent ◽  
Associated Solution Model ◽  
Associated Solution ◽  
The Ideal

We have made new measurements of the enthalpies of adding cyclohexane to mixtures of chloroform + triethylamine + cyclohexane at 25 °C. The results of these measurements have been analysed in terms of the ideal associated solution model to obtain ΔHθ for the dissociation of the chloroform-triethylamine complex. Our value of ΔHθ is in excellent agreement with a published value that was obtained from results of measurements on binary mixtures of chloroform + triethylamine. This agreement indicates that it is usefully accurate to treat mixtures of chloroform + triethylamine + cyclohexane as ideal mixtures of chloroform, triethylamine, cyclohexane, and chloroform-triethylamine complex. This result has important implications for studies of associated systems dissolved in "inert" solvents and helps to provide a connection between complex formation in dilute solutions and in binary systems (A + B, no solvent). Keywords: ideal associated solution model, chloroform, triethylamine, inert solvent, hydrogen bonded complex.

Electrical Conductivity of Molten LaBr3 and LaBr3–MBr Binary Mixtures

2005 ◽  
Vol 60 (1-2) ◽  
pp. 75-80 ◽  
Author(s):  
B. Ziolek ◽  
L. Rycerz ◽  
S. Gadzurica ◽  
E. Ingier-Stocka ◽  
M. Gaune-Escardb
Keyword(s):  
Electrical Conductivity ◽  
Complex Formation ◽  
Alkali Metal ◽  
Binary Mixtures ◽  
Composition Range ◽  
Arrhenius Equation

The electrical conductivity of liquid binary LaBr3-alkali metal bromide mixtures was measured as function of the temperature over the whole composition range. Prior to these measurements, LaBr3 was reinvestigated because of the discrepancies in the literature values. The classical Arrhenius equation did not stand for any individual mixture. These results were discussed in terms of complex formation in the melts.

scholarly journals Macro-B12 masking B12 deficiency

2022 ◽  
Vol 15 (1) ◽  
pp. e247660
Author(s):  
Bruce H R Wolffenbuttel ◽  
Anneke C Muller Kobold ◽  
Agata Sobczyńska‐Malefora ◽  
Dominic J Harrington
Keyword(s):  
Clinical Practice ◽  
Complex Formation ◽  
Young Woman ◽  
Liver Diseases ◽  
Binding Proteins ◽  
Elevated Serum ◽  
Neurologic Symptoms ◽  
Upper Limit ◽  
Oral Form ◽  
B12 Deficiency

In clinical practice, the finding of an elevated serum B12 concentration is often the consequence of supplementation with B12 in either oral form or injections. Also, elevated serum B12 may be associated with underlying disorders, like liver diseases or a (haematologic) malignancy. Only a few studies have shown that it may also be the consequence of complex formation of B12-vitamin binding proteins with immunoglobulins, the so-called macro-B12. We describe a young woman who previously was diagnosed with B12 deficiency, and in whom, after cessation of B12 injection treatment, neurologic symptoms re-appeared, and despite this, repeatedly elevated serum B12 concentrations above the upper limit of the assay were found. We demonstrated that this was caused by the presence of macro-B12, which not only resulted in erroneous and longstanding elevated serum B12, but also masked her underlying B12 deficiency.

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