The structural properties of ZnCl2-ethylene glycol binary system and the peculiarities at the eutectic composition

2021 ◽  
Author(s):  
Payam Kalhor ◽  
Khashayar Ghandi ◽  
Hamad Ashraf ◽  
Zhiwu Yu
Keyword(s):  
Binary System ◽  
Ethylene Glycol ◽  
Ftir Spectroscopy ◽  
Structural Properties ◽  
Eutectic Composition ◽  
Deep Eutectic Solvent ◽  
Molar Ratios ◽  
Wide Range

ATR-FTIR spectroscopy was performed on a series of ZnCl2-ethylene glycol (EG) mixtures with wide-range compositions (1:1.5-1:14 in molar ratios), involving the stable ZnCl2-4EG deep-eutectic solvent (DES) composition, to explore the...

Internal Cation Mobilities and Their Isotope Effects in the Molten System (Li, K)NO3

1987 ◽  
Vol 42 (7) ◽  
pp. 683-689 ◽  
Author(s):  
Arnold Lundén ◽  
Junko Habasaki ◽  
Isao Okada
Keyword(s):  
Binary System ◽  
Eutectic Composition ◽  
Isotope Effects ◽  
Wide Range ◽  
Internal Mobility ◽  
Space Effect ◽  
High Concentrations ◽  
Increasing Temperature ◽  
Crossing Point ◽  
Very High

With the Klemm method internal mobility ratios of the two cations have been measured for melts of the binary system (Li, K ) NO3 over a wide range of temperature and composition, and their isotope effects have been determined near the eutectic composition. The Chemla effect has been observed. With increasing temperature the Chemla crossing point shifts, as expected, toward higher concentrations of the smaller cation. At very high concentrations of LiNO3 the mobility of K+ tends to decrease, which is attributed to the free space effect. For both Li+ and K+ the isotope effect increases with temperature.

Mechanistic Study on Surface Tension of Binary and Ternary Mixtures Containing Choline Chloride, Ethylene Glycol and Water (Components of Aqueous Solutions of a Deep Eutectic Solvent, Ethaline)

2020 ◽  
Vol 234 (3) ◽  
pp. 399-413 ◽  
Author(s):  
Yelyzaveta Rublova ◽  
Anna Kityk ◽  
Felix Danilov ◽  
Vyacheslav Protsenko
Keyword(s):  
Surface Tension ◽  
Ethylene Glycol ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Eutectic Mixture ◽  
Liquid Solution ◽  
Ternary Mixtures ◽  
Mechanistic Study ◽  
Wide Range ◽  
Binary And Ternary Mixtures

AbstractThe paper reports the results of the measurement of surface tension in binary liquid mixtures containing choline chloride, ethylene glycol and water and ternary mixtures of ethaline (a eutectic mixture of ethylene glycol and choline chloride, the so-called deep eutectic solvent) with water. The surface tension is determined in a wide range of components’ concentration for the temperatures of 25, 30, 40, 50, 60 and 70 °C. The dependences of surface tension on the concentration of liquids are treated by means of Gibbs adsorption isotherm and linear form of Langmuir adsorption isotherms. The values of the equilibrium constant of adsorption at the interface liquid solution/air as well as the standard adsorption Gibbs energy, enthalpy and entropy are calculated for the binary and ternary mixtures under consideration. The obtained results are interpreted in the light of intermolecular interactions in fluids. Our findings show that ethylene glycol and choline cation interact with each other in the adsorbed surface layer formed at the interface between air and diluted solutions of ethaline.

scholarly journals Human Plasma and Recombinant Hemopexins: Heme Binding Revisited

2021 ◽  
Vol 22 (3) ◽  
pp. 1199
Author(s):  
Elena Karnaukhova ◽  
Catherine Owczarek ◽  
Peter Schmidt ◽  
Dominik J. Schaer ◽  
Paul W. Buehler
Keyword(s):  
Protein S ◽  
Soret Band ◽  
Cell System ◽  
Size Exclusion ◽  
Heme Binding ◽  
Systematic Analysis ◽  
Molar Ratios ◽  
Recombinant Production ◽  
Wide Range ◽  
Exclusion Chromatography

Plasma hemopexin (HPX) is the key antioxidant protein of the endogenous clearance pathway that limits the deleterious effects of heme released from hemoglobin and myoglobin (the term “heme” is used in this article to denote both the ferrous and ferric forms). During intra-vascular hemolysis, heme partitioning to protein and lipid increases as the plasma concentration of HPX declines. Therefore, the development of HPX as a replacement therapy during high heme stress could be a relevant intervention for hemolytic disorders. A logical approach to enhance HPX yield involves recombinant production strategies from human cell lines. The present study focuses on a biophysical assessment of heme binding to recombinant human HPX (rhHPX) produced in the Expi293FTM (HEK293) cell system. In this report, we examine rhHPX in comparison with plasma HPX using a systematic analysis of protein structural and functional characteristics related to heme binding. Analysis of rhHPX by UV/Vis absorption spectroscopy, circular dichroism (CD), size-exclusion chromatography (SEC)-HPLC, and catalase-like activity demonstrated a similarity to HPX fractionated from plasma. In particular, the titration of HPX apo-protein(s) with heme was performed for the first time using a wide range of heme concentrations to model HPX–heme interactions to approximate physiological conditions (from extremely low to more than two-fold heme molar excess over the protein). The CD titration data showed an induced bisignate CD Soret band pattern typical for plasma and rhHPX versions at low heme-to-protein molar ratios and demonstrated that further titration is dependent on the amount of protein-bound heme to the extent that the arising opposite CD couplet results in a complete inversion of the observed CD pattern. The data generated in this study suggest more than one binding site in both plasma and rhHPX. Furthermore, our study provides a useful analytical platform for the detailed characterization of HPX–heme interactions and potentially novel HPX fusion constructs.

scholarly journals Deep Eutectic Solvent Formed by Imidazolium Cyanopyrrolide and Ethylene Glycol for Reactive CO2 Separations

2021 ◽  
Vol 9 (3) ◽  
pp. 1090-1098
Author(s):  
Yun-Yang Lee ◽  
Drace Penley ◽  
Aidan Klemm ◽  
William Dean ◽  
Burcu Gurkan
Keyword(s):  
Ethylene Glycol ◽  
Deep Eutectic Solvent

scholarly journals Local Toxicity of Topically Administrated Thermoresponsive Systems: In Vitro Studies with In Vivo Correlation

2018 ◽  
Vol 47 (3) ◽  
pp. 426-432 ◽  
Author(s):  
Sivan Yogev ◽  
Ayelet Shabtay-Orbach ◽  
Abraham Nyska ◽  
Boaz Mizrahi
Keyword(s):  
Block Copolymer ◽  
Ethylene Glycol ◽  
Medical Devices ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Thermoresponsive Polymers ◽  
Wide Range ◽  
Poly Ethylene

Thermoresponsive materials have the ability to respond to a small change in temperature—a property that makes them useful in a wide range of applications and medical devices. Although very promising, there is only little conclusive data about the cytotoxicity and tissue toxicity of these materials. This work studied the biocompatibility of three Food and Drug Administration approved thermoresponsive polymers: poly( N-isopropyl acrylamide), poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) tri-block copolymer, and poly(lactic acid-co-glycolic acid) and poly(ethylene glycol) tri-block copolymer. Fibroblast NIH 3T3 and HaCaT keratinocyte cells were used for the cytotoxicity testing and a mouse model for the in vivo evaluation. In vivo results generally showed similar trends as the results seen in vitro, with all tested materials presenting a satisfactory biocompatibility in vivo. pNIPAM, however, showed the highest toxicity both in vitro and in vivo, which was explained by the release of harmful monomers and impurities. More data focusing on the biocompatibility of novel thermoresponsive biomaterials will facilitate the use of existing and future medical devices.

Effect of co-existing copper and calcium on the removal of As(V) by reused aluminum oxides

2013 ◽  
Vol 67 (1) ◽  
pp. 187-192
Author(s):  
J. K. Yang ◽  
Y. J. Park ◽  
K. H. Kim ◽  
H. Y. Lee ◽  
K. C. Min ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Binary System ◽  
Aluminum Oxide ◽  
Aqueous Solutions ◽  
Copper Concentration ◽  
Calcium Concentration ◽  
Environmental Fate ◽  
Mine Drainage ◽  
Aluminum Oxides ◽  
Molar Ratios

Among the various heavy metals, arsenic is frequently found in abandoned mine drainage and the environmental fate of arsenic in real aqueous solutions can be highly dependent on the presence of co-existing ions. In this study, removal of arsenate through adsorption on the reused aluminum oxide or through precipitation was investigated in a single and in a binary system as a function of pH and concentration. Different removal behaviors of arsenate were observed in the presence of different cations as well as a variation of the molar ratios of arsenate to cations. Co-operative effects on arsenate removal by precipitation in solution occurred with an increase of copper concentration, while a decrease of arsenate removal resulted in increasing calcium concentration. It was observed that the arsenate removal in the presence of calcium would be highly dependent on the molar ratios of both elements.

A review of structural properties and synthesis methods of solid electrolyte materials in the Li2S − P2S5 binary system

2018 ◽  
Vol 407 ◽  
pp. 31-43 ◽  
Author(s):  
Ömer Ulaş Kudu ◽  
Theodosios Famprikis ◽  
Benoit Fleutot ◽  
Marc-David Braida ◽  
Thierry Le Mercier ◽  
...  
Keyword(s):  
Binary System ◽  
Solid Electrolyte ◽  
Structural Properties ◽  
Synthesis Methods

The Control of the Reactions of Strontium Hexaferrite Formation by the Molar Ratio of Precursors

2007 ◽  
Vol 280-283 ◽  
pp. 471-472
Author(s):  
S.A. Seyyed Ebrahimi
Keyword(s):  
Critical Parameters ◽  
Molar Ratio ◽  
Strontium Hexaferrite ◽  
Strontium Oxide ◽  
Molar Ratios ◽  
Temperature Method ◽  
Wide Range ◽  
Method Of Production ◽  
Thermal Analysis Techniques

Strontium hexaferrite is one of the very important categories of magnetic materials with a wide range applications. One of the very critical parameters in the high temperature method of production of this material is molar ratio of iron oxide to strontium oxide. Although there could be found some reports on the effect of this parameter on the physical properties of the material in the literature but there are very few investigations about the role of this factor on the reactions occurred in the process. In this work the effect of different molar ratios of precursors on the reactions carried out for processing of strontium hexaferrite have been investigated by using thermal analysis techniques such as DTA/TG. Furthermore, the microstructure and the powder and bulk magnetic properties of the products have been studied by SEM, VSM and permeameter.

scholarly journals Monitoring Radiotherapeutic Response in Prostate Cancer Patients Using High Throughput FTIR Spectroscopy of Liquid Biopsies

Cancers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 925 ◽  
Author(s):  
Dinesh K.R. Medipally ◽  
Thi Nguyet Que Nguyen ◽  
Jane Bryant ◽  
Valérie Untereiner ◽  
Ganesh D. Sockalingum ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Blood Plasma ◽  
Ftir Spectroscopy ◽  
Cancer Patients ◽  
Radiation Toxicity ◽  
Plasma Samples ◽  
Analysis Model ◽  
Liquid Biopsies ◽  
Time Points ◽  
Wide Range

Radiation therapy (RT) is used to treat approximately 50% of all cancer patients. However, RT causes a wide range of adverse late effects that can affect a patient’s quality of life. There are currently no predictive assays in clinical use to identify patients at risk of normal tissue radiation toxicity. This study aimed to investigate the potential of Fourier transform infrared (FTIR) spectroscopy for monitoring radiotherapeutic response. Blood plasma was acquired from 53 prostate cancer patients at five different time points: prior to treatment, after hormone treatment, at the end of radiotherapy, two months post radiotherapy and eight months post radiotherapy. FTIR spectra were recorded from plasma samples at all time points and the data was analysed using MATLAB software. Discrimination was observed between spectra recorded at baseline versus follow up time points, as well as between spectra from patients showing minimal and severe acute and late toxicity using principal component analysis. A partial least squares discriminant analysis model achieved sensitivity and specificity rates ranging from 80% to 99%. This technology may have potential to monitor radiotherapeutic response in prostate cancer patients using non-invasive blood plasma samples and could lead to individualised patient radiotherapy.

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