Solid + Liquid Equilibria for the Systems CsBr + ErBr3+ H2O and CsBr + ErBr3+ HBr (∼12.3%) + H2O at 298.15 K and Atmospheric Pressure and Thermodynamic and Fluorescent Properties of the New Solid-Phase Compound

2015 ◽  
Vol 60 (6) ◽  
pp. 1900-1905 ◽  
Author(s):  
Zhao-Wan Li ◽  
Zhan-Ping Qiao ◽  
Yuan-Lin Dang ◽  
Xin Chen ◽  
Qi-Chao Yang
Keyword(s):  
Atmospheric Pressure ◽  
Solid Phase ◽  
Fluorescent Properties ◽  
Phase Compound ◽  
Solid Liquid

Unusual liquid-solid transition effects in a methoxypentamethylflavan

1958 ◽  
Vol 243 (1235) ◽  
pp. 518-533 ◽  
Keyword(s):  
Solid Phase ◽  
Polarized Light ◽  
Melting Process ◽  
X Rays ◽  
Melting Range ◽  
Crystalline Materials ◽  
External Conditions ◽  
Transition Effects ◽  
Solid Liquid ◽  
Crystal Boundaries

The solid phase of the compound 2'-methoxy-2 : 4 : 4 : 7 : 4'- pentamethylflavan differs in many respects from normally crystalline materials, yet is not amorphous. It tends to form spherical masses which exhibit no regular crystal boundaries, even when seen under the microscope. The solid melts over a range of up to 3° C and the actual temperatures at which melting begins and ends vary according to the thermal treatment previously received by the specimen. The temperature at which the melt starts to solidify on cooling is always several degrees below the melting range; this is not due to normal supercooling. Solidification from the melt presents several other interesting features, including some rhythmic effects. Variations in the external conditions during solidification can give rise to three superficially different forms of the solid phase. The solid-liquid and liquid-solid transitions have been followed by measurements of density, rigidity and dielectric constant, all of which give further indications of the diffuse nature of the melting process and the existence of hysteresis between melting and solidifica­tion. These effects recall the behaviour of some crystalline high polymers and examination of solid methoxypentamethylflavan by polarized light, X-rays and electron microscopy has revealed further analogies with such materials. It is tentatively concluded that the solid is composed of submicroscopic crystalline regions which are organized into larger spherulitic aggregates, but no definite explanations of the failure of the compound to form macroscopic crystals or of the similarities between it and polymers seem possible at present.

scholarly journals Kinetics of solanidine hydrolytic extraction from potato (Solanum tuberosum L) haulm solid-liquid systems

2003 ◽  
Vol 68 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Nada Nikolic ◽  
Mihajlo Stankovic
Keyword(s):  
Solanum Tuberosum ◽  
Hydrochloric Acid ◽  
Solid Phase ◽  
Solanum Tuberosum L ◽  
Volume Ratio ◽  
Single Step ◽  
Ethanolic Solution ◽  
Liquid Systems ◽  
Solid Liquid ◽  
Kinetics Of

Dried and milled haulm of potato (Solanum tuberosum L) was used as the solid phase. An ethanolic solution of hydrochloric acid mixed with chloroform in different volume ratios was the liquid phase. The aim of paper was to unite in a single step the processes of glycoalkaloids extraction from haulm, their hydrolysis to solanidine and the extraction of solanidine. This could make the procedure of obtaining solanidine faster and simpler. The best degree of solanidine hydrolytic extraction of 84.5% was achieved using 10% w/v hydrochloric acid in 96% vol. ethanol mixed with chloroform in a volume ratio of 2:3, after 120 min of hydrolytic extraction.

scholarly journals Identification of Phytochemicals from the Water Extract of Eurycoma longifolia Roots using Solid-Liquid and Liquid-Liquid Extraction Based Fractionation Techniques

2021 ◽  
Vol 68 (4) ◽  
pp. 765-772
Author(s):  
Lee Suan Chua ◽  
Abirame Segaran ◽  
Hoi Jin Wong
Keyword(s):  
Ethyl Acetate ◽  
Solid Phase ◽  
Water Extract ◽  
Reversed Phase ◽  
Liquid Extraction ◽  
Acetone Precipitation ◽  
Eurycoma Longifolia ◽  
Liquid Liquid Extraction ◽  
Saponin Content ◽  
Solid Liquid

Phytochemicals in the water extract of Eurycoma longofolia roots were identified using both solid-liquid and liquid-liquid extraction based fractionation techniques. A reversed phase C18 solid phase extraction (SPE) was used as solid-liquid extraction, whereas solvent partition was applied as liquid-liquid extraction. Total saponin was increased after fractionation. A few known quassinoids; eurycomanone, 13α(21)-epoxyeurycomanone, pasakbumin D, 13β,18-dihydroeurycomanol and 13β,21-dihydroxyeurycomanol were identified from the 40% and 60% methanol fractions of SPE. Solvent partition extract using ethyl acetate was found to have the highest saponin content compared to butanol and chloroform fractions. Subsequent acetone precipitation of the organic fractions recovered a formylated hexose trimer and other saccharide-containing compounds. Ethyl acetate effectively recovered saponins from E. longofolia water extract using liquid-liquid extraction followed by acetone precipitation.

Mathematical Modeling of a Solid–Liquid Mixture with Mass Exchange Between Constituents

2006 ◽  
Vol 11 (6) ◽  
pp. 575-595 ◽  
Author(s):  
L. Fusi ◽  
A. Farina ◽  
D. Ambrosi
Keyword(s):  
Mathematical Modeling ◽  
Liquid Mixture ◽  
Solid Phase ◽  
Deformation Gradient ◽  
Elastic Solid ◽  
Solid Deformation ◽  
Solid Stress ◽  
Phase Deformation ◽  
Mass Conversion ◽  
Solid Liquid

The mechanical behavior of a mixture composed by an elastic solid and a fluid that exchange mass is investigated. Both the liquid flow and the solid deformation depend on how the solid phase has increased (diminished) its mass, i.e. on the mass conversion between constituents. The model is developed introducing a decomposition of the solid phase deformation gradient. In particular, exploiting the criterion of maximization of the rate of entropy production, we determine an explicit evolution equation for the so-called growth tensor which involves directly the solid stress tensor. An example of a possible choice of the constitutive functions is also presented.

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