scholarly journals Cover Feature: N , N ‐Dimethoxyimidazolium Derivatives as Ion Pair Constituents of Energetic Redox Couples: Model Studies by Thermal Analysis and Crystallography (Z. Anorg. Allg. Chem. 4/2021)

2021 ◽  
Vol 647 (4) ◽  
pp. 153-153
Author(s):  
Lukas Fliri ◽  
Thomas Gelbrich ◽  
Ulrich J. Griesser ◽  
Gabriel Partl ◽  
Felix R. S. Purtscher ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Ion Pair ◽  
Model Studies ◽  
Redox Couples

scholarly journals Potentiometric Membrane Sensors for Levamisole Determination

2016 ◽  
Vol 6 (2) ◽  
pp. 7-14 ◽  
Author(s):  
Natalia Zubenya ◽  
Natalia Zubenya ◽  
Zholt Kormosh ◽  
Diana Saribekova ◽  
Diana Saribekova ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Pharmaceutical Preparations ◽  
Ion Pair ◽  
Theoretical Interpretation ◽  
Pvc Membrane ◽  
Direct Potentiometry ◽  
Nernstian Slope ◽  
Three Stages ◽  
Selective Sensor

The ion pair (IP) of levamisole with BiI4 - (SbI4 - ) for the levamisole-selective sensor with a PVC membrane containing - ions were developed. Thermal behavior of obtained IP was investigated by differential thermal analysis that would show the thermal stability and the character of the decomposition of the complex. The thermolysis of Lev+BiI4 - IP undergoes three stages that fit a theoretical interpretation. The linearity ranges of levamisole sensors function are 7.9 ×10-6 – 1×10-1 (7.9 ×10-5 – 1×10-1 ) M. The Nernstian slope of 50.6 – 53.4 mV pC−1 and detection limit of 5.0 × 10−5 – 1.5 × 10−4) M. The working range of pH is 2.8 – 6.0. The efficiency of the use of electrodes for levamisole content control in pharmaceutical preparations was shown by direct potentiometry and potentiometric titration methods.

A Thermal Analysis of Hot Oiling

1991 ◽  
Vol 113 (3) ◽  
pp. 161-164 ◽  
Author(s):  
F. C. Arnold
Keyword(s):  
Thermal Analysis ◽  
Finite Difference ◽  
Field Studies ◽  
Formation Damage ◽  
Operating Parameters ◽  
Model Studies ◽  
Entire Depth ◽  
Using Data ◽  
Oil Injection ◽  
Effective Transmission

The injection of hot oil to clean the formation and tubing of accumulated paraffin has been used for many years in petroleum production. Although effective in freeing tubulars immobilized by paraffin deposits, formation damage has been attributed to hot oiling when the oil reaching the formation face is at a temperature below the paraffin cloud point. The differential equations describing hot oil injection through the casing-tubing annulus were solved using finite difference mathematics and the model was verified using data from field studies. Model studies indicated that rapid cooling of the injected fluid frequently results in fluid temperatures below geothermal in the lower reaches of wells of even moderate depth. Injection through centralized tubing provides a conduit for effective transmission of thermal energy along the entire depth of the tubing and to the formation face. Injection through tubing is modeled and verified by field experiment. A parametric study of operating parameters is included.

“In vitro” and in Animal Model Studies on a Double Virus- Inactivated Factor VIII Concentrate

1995 ◽  
Vol 74 (03) ◽  
pp. 868-873 ◽  
Author(s):  
Silvana Arrighi ◽  
Roberta Rossi ◽  
Maria Giuseppina Borri ◽  
Vladimir Lesnikov ◽  
Marina Lesnikov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Animal Model ◽  
Factor Viii ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Virus Inactivation ◽  
Enveloped Viruses ◽  
Model Studies ◽  
Heat Treated

SummaryTo improve the safety of plasma derived factor VIII (FVIII) concentrate, we introduced a final super heat treatment (100° C for 30 min) as additional virus inactivation step applied to a lyophilized, highly purified FVIII concentrate (100 IU/mg of proteins) already virus inactivated using the solvent/detergent (SID) method during the manufacturing process.The efficiency of the super heat treatment was demonstrated in inactivating two non-lipid enveloped viruses (Hepatitis A virus and Poliovirus 1). The loss of FVIII procoagulant activity during the super heat treatment was of about 15%, estimated both by clotting and chromogenic assays. No substantial changes were observed in physical, biochemical and immunological characteristics of the heat treated FVIII concentrate in comparison with those of the FVIII before heat treatment.

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