COMPARATIVE STUDY ON ROSMARINIC ACID SEPARATION BY REACTIVE EXTRACTION WITH AMBERLITE LA-2 AND D2EHPA 2. KINETICS OF THE INTERFACIAL REACTIONS

2014 ◽  
Vol 13 (6) ◽  
pp. 1473-1482 ◽  
Author(s):  
Dan Cascaval ◽  
Madalina Postaru ◽  
Lenuta Kloetzer ◽  
Anca-Irina Galaction ◽  
Alexandra Cristina Blaga
Keyword(s):  
Comparative Study ◽  
Rosmarinic Acid ◽  
Interfacial Reactions ◽  
Reactive Extraction ◽  
Kinetics Of

Comparative Study on Rosmarinic Acid Separation by Reactive Extraction with Amberlite LA-2 and D2EHPA. 1. Interfacial Reaction Mechanism and Influencing Factors

2013 ◽  
Vol 52 (38) ◽  
pp. 13785-13794 ◽  
Author(s):  
Lenuţa Kloetzer ◽  
Mădălina Poştaru ◽  
Anca-Irina Galaction ◽  
Alexandra Cristina Blaga ◽  
Dan Caşcaval
Keyword(s):  
Reaction Mechanism ◽  
Comparative Study ◽  
Influencing Factors ◽  
Interfacial Reaction ◽  
Rosmarinic Acid ◽  
Reactive Extraction

Ion Beam Induced Interfacial Reactions in Molybdenum Thin Films on Silicon

1981 ◽  
Vol 39 ◽  
pp. 162-163
Author(s):  
L. J. Chen ◽  
L. S. Hung ◽  
J. W. Mayer
Keyword(s):  
Ion Beam ◽  
Chemical Vapor ◽  
Interfacial Reactions ◽  
Practical Applications ◽  
Microelectronic Devices ◽  
Recent Emergence ◽  
Chemical Vapor Deposited ◽  
Atomic Mixing ◽  
Silicon Interface ◽  
Kinetics Of

When an energetic ion penetrates through an interface between a thin film (of species A) and a substrate (of species B), ion induced atomic mixing may result in an intermixed region (which contains A and B) near the interface. Most ion beam mixing experiments have been directed toward metal-silicon systems, silicide phases are generally obtained, and they are the same as those formed by thermal treatment.Recent emergence of silicide compound as contact material in silicon microelectronic devices is mainly due to the superiority of the silicide-silicon interface in terms of uniformity and thermal stability. It is of great interest to understand the kinetics of the interfacial reactions to provide insights into the nature of ion beam-solid interactions as well as to explore its practical applications in device technology.About 500 Å thick molybdenum was chemical vapor deposited in hydrogen ambient on (001) n-type silicon wafer with substrate temperature maintained at 650-700°C. Samples were supplied by D. M. Brown of General Electric Research & Development Laboratory, Schenectady, NY.

Comparative study of rosmarinic acid content in Satureja species

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
H Hajimehdipoor ◽  
M Shekarchi ◽  
S Saeidnia ◽  
A Gohari ◽  
Z Abedi
Keyword(s):  
Comparative Study ◽  
Acid Content ◽  
Rosmarinic Acid

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.

Kinetics of Chemical Changes in Phenol Formaldehyde Based Polymeric Films Etched in N2O and O2Inductively Coupled Plasmas: A Comparative Study

2009 ◽  
Vol 48 (8) ◽  
pp. 08HA02 ◽  
Author(s):  
Kwang-Ho Kwon ◽  
Nam-Ki Min ◽  
Seung-Youl Kang ◽  
Kyu-Ha Baek ◽  
Kyung Soo Suh ◽  
...  
Keyword(s):  
Comparative Study ◽  
Phenol Formaldehyde ◽  
Polymeric Films ◽  
Chemical Changes ◽  
Coupled Plasmas ◽  
Kinetics Of
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