Kinetic studies on saponification of ethyl acetate using an innovative conductivity-monitoring instrument with a pulsating sensor

2011 ◽  
Vol 43 (11) ◽  
pp. 648-656 ◽  
Author(s):  
Kuheli Das ◽  
P. Sahoo ◽  
M. Sai Baba ◽  
N. Murali ◽  
P. Swaminathan
Keyword(s):  
Ethyl Acetate ◽  
Kinetic Studies ◽  
Monitoring Instrument ◽  
Pulsating Sensor

scholarly journals Data acquisition system for chemical kinetic studies

1989 ◽  
Vol 11 (3) ◽  
pp. 113-118
Author(s):  
Yu-zhen Zhu ◽  
Xin Zhou ◽  
Xiang-sheng Zang
Keyword(s):  
Experimental Data ◽  
Ethyl Acetate ◽  
Specific Problem ◽  
Reference Value ◽  
Kinetic Studies ◽  
Data Acquisition System ◽  
Chemical Kinetic ◽  
Interval Method ◽  
Starting Time

The computer-interfaced system for second-order chemical kinetic studies was applied to the determination of the rate constant of the saponification of ethyl acetate at 35°C. For this specific problem, an averaging treatment was used which can be called an interval method. The use of this method avoids the diffcully of measuring the starting time of the reaction. Two groups of experimental data and results were used to evaluate the systems performance. All of the results obtained are in agreement with the reference value.

scholarly journals TLC-spectrodensitometric method for simultaneous determination of dapagliflozin and rosuvastatin in rabbit plasma: stability indicating assay and kinetic studies

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 40795-40805
Author(s):  
Noha S. Abbas ◽  
Sayed M. Derayea ◽  
Mahmoud A. Omar ◽  
Gamal A. Saleh
Keyword(s):  
Ethyl Acetate ◽  
Simultaneous Determination ◽  
Mobile Phase ◽  
Kinetic Studies ◽  
Urine Samples ◽  
Plasma Stability ◽  
Rabbit Plasma ◽  
Stability Indicating ◽  
Plasma And Urine Samples

Mixtures of DAPA and ROSV were separated using ethyl acetate : methanol (5 : 0.1 v/v) as mobile phase and applied in plasma and urine samples in addition to stability indicating and kinetic studies.

High performance conductivity monitoring instrument with pulsating sensor

2010 ◽  
Vol 81 (6) ◽  
pp. 065109 ◽  
Author(s):  
P. Sahoo ◽  
N. Malathi ◽  
K. Praveen ◽  
R. Ananthanarayanan ◽  
A. D. Arun ◽  
...  
Keyword(s):  
High Performance ◽  
Monitoring Instrument ◽  
Pulsating Sensor

Flavin radicals, conformational sampling and robust design principles in interprotein electron transfer: the trimethylamine dehydrogenase-electron-transferring flavoprotein complex

2004 ◽  
Vol 71 ◽  
pp. 1-14
Author(s):  
David Leys ◽  
Jaswir Basran ◽  
François Talfournier ◽  
Kamaldeep K. Chohan ◽  
Andrew W. Munro ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Kinetic Studies ◽  
Molecular Assembly ◽  
Conformational Sampling ◽  
Trimethylamine Dehydrogenase ◽  
Key Residues ◽  
Electron Transferring Flavoprotein ◽  
Electron Transfer Complex

TMADH (trimethylamine dehydrogenase) is a complex iron-sulphur flavoprotein that forms a soluble electron-transfer complex with ETF (electron-transferring flavoprotein). The mechanism of electron transfer between TMADH and ETF has been studied using stopped-flow kinetic and mutagenesis methods, and more recently by X-ray crystallography. Potentiometric methods have also been used to identify key residues involved in the stabilization of the flavin radical semiquinone species in ETF. These studies have demonstrated a key role for 'conformational sampling' in the electron-transfer complex, facilitated by two-site contact of ETF with TMADH. Exploration of three-dimensional space in the complex allows the FAD of ETF to find conformations compatible with enhanced electronic coupling with the 4Fe-4S centre of TMADH. This mechanism of electron transfer provides for a more robust and accessible design principle for interprotein electron transfer compared with simpler models that invoke the collision of redox partners followed by electron transfer. The structure of the TMADH-ETF complex confirms the role of key residues in electron transfer and molecular assembly, originally suggested from detailed kinetic studies in wild-type and mutant complexes, and from molecular modelling.

Antioxidant and anticancer activities of methanolic, ethyl acetate and chloroform extracts of Arum Palaestinum

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
M Diab-Assaf ◽  
RI Taleb ◽  
W Shebaby ◽  
A Mansour ◽  
CJ Moussa ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Anticancer Activities

Tc-99m Labeled Complexes of Aldehydes and Glutamate as Cholescintigraphic Agents

1975 ◽  
Vol 14 (04) ◽  
pp. 330-338
Author(s):  
L. G. Colombetti ◽  
J. S. Arnold ◽  
W. E. Barnes
Keyword(s):  
Nuclear Medicine ◽  
Gall Bladder ◽  
Rose Bengal ◽  
Valence State ◽  
Monosodium Glutamate ◽  
Kinetic Studies ◽  
Scintillation Camera ◽  
Blood Clearance ◽  
Lower Valence ◽  
Wire Basket

SummaryTc-99m pyridoxylidene glutamate has proven to be an excellent biliary scanning agent, far superior in many respect to the commonly used 1-131 rose bengal. The preparation of the compound as previously reported by Baker et al is too time consuming and requires the use of an autoclave which is not available in most nuclear medicine departments. In our facility, we have been preparing similar compounds using several aldehydes and monosodium glutamate to make labeled complexes having the same pharmacological characteristics. The mixture of monosodium glutamate, aldehyde, and Tc-99m pertechnetate is made slightly alkaline, purged with helium, and placed in a sealed vial. The vial, which is protected by a wire basket, is then heated in a laboratory oven at 130° C for a period of 15 to 20 minutes. During this time, the technetium is reduced to a lower valence state and bound to the complex formed. Chromatographic data show that these compounds are chemically similar to that previously reported. The compounds prepared concentrate in the gall bladder of the rabbit in less than 10 minutes. Kinetic studies have been performed on dogs with a scintillation camera and small digital computer to measure rates of blood clearance, liver and gall bladder uptake, and excretion into the intestine. The aldehyde — glutamate complex promises to be a useful scanning agent for the diagnosis of biliary and hepatocellular diseases.

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