Kinetics of Degradation and Size Distribution of Long Chain Polymers

1941 ◽  
Vol 12 (7) ◽  
pp. 569-578 ◽  
Author(s):  
Robert Simha
Keyword(s):  
Size Distribution ◽  
Kinetics Of Degradation ◽  
Kinetics Of ◽  
Long Chain

Progress in Characterization of Sludge Particles

1993 ◽  
Vol 28 (1) ◽  
pp. 145-148 ◽  
Author(s):  
E. Friedrich ◽  
H. Friedrich ◽  
W. Heinze ◽  
K. Jobst ◽  
H.-J. Richter ◽  
...  
Keyword(s):  
Surface Charge ◽  
Size Distribution ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Degradation Process ◽  
Laser Diffraction ◽  
Kinetics Of Degradation ◽  
Kinetics Of

The studies aimed at examining the influences of the particle size distribution and surface charge on the behaviour of sludge in dewatering. It was possible to show that defined size dispersions of sludge particles as well as surface charge are necessary to reach better dewatering results and that the found correlations were independent of the type of sludge and the sewage treatment plant (Friedrich et al., 1990 and 1991). Based on laser diffraction measurements to determine panicle size distribution it was found that it was necessary to set a specific proportion between fine and large sludge particles in order to produce the best possible dewatering results and to get the required shear resistant flocs. To characterize the surface charge of the sludge particles various measuring methods were used. Determining the zeta-potential is a suitable means to describe the kinetics of degradation process in the sludge.

scholarly journals Comparative Study of Chemical Stability of Two H1Antihistaminic Drugs, Terfenadine and ItsIn VivoMetabolite Fexofenadine, Using LC-UV Methods

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Anna Gumieniczek ◽  
Anna Berecka-Rycerz ◽  
Rafał Pietraś ◽  
Izabela Kozak ◽  
Karolina Lejwoda ◽  
...  
Keyword(s):  
Comparative Study ◽  
Chemical Stability ◽  
First Order ◽  
First Order Kinetics ◽  
Kinetics Of Degradation ◽  
Effects Of Temperature ◽  
High Doses ◽  
Antihistaminic Drugs ◽  
Kinetics Of

A comparative study of chemical stability of terfenadine (TER) and itsin vivometabolite fexofenadine (FEX) was performed. Both TER and FEX were subjected to high temperature at different pH and UV/VIS light at different pH and then quantitatively analyzed using new validated LC-UV methods. These methods were used to monitor the degradation processes and to determine the kinetics of degradation for both the compounds. As far as the effects of temperature and pH were concerned, FEX occurred more sensitive to degradation than TER. As far as the effects of UV/VIS light and pH were concerned, the both drugs were similarly sensitive to high doses of light. Using all stress conditions, the processes of degradation of TER and FEX followed the first-order kinetics. The results obtained for these two antihistaminic drugs could be helpful in developing their new derivatives with higher activity and stability at the same time.

The Kinetics of Degradation of Chloramphenicol in Solution

1954 ◽  
Vol 43 (3) ◽  
pp. 129-134 ◽  
Author(s):  
Takeru Higuchi ◽  
Charles D. Bias ◽  
Arnold D. Marcus
Keyword(s):  
Kinetics Of Degradation ◽  
Kinetics Of

Analyzing the kinetics of degradation of Acid Red B dye through Fenton oxidation with online monitoring system

2021 ◽  
Vol 216 ◽  
pp. 412-422
Author(s):  
Aiguo Li ◽  
Xiaofeng Fang ◽  
Jiangyuan Sun ◽  
Qianpeng Liu ◽  
Yingying Lian ◽  
...  
Keyword(s):  
Monitoring System ◽  
Online Monitoring ◽  
Fenton Oxidation ◽  
Kinetics Of Degradation ◽  
Online Monitoring System ◽  
Kinetics Of
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