Results 231 to 240 of about 231,063 (267)

Degradation Kinetics of Gonadorelin in Aqueous Solution

Journal of Pharmaceutical Sciences, 1996
The degradation kinetics of gonadorelin were investigated systematically with reversed-phase high-performance liquid chromatography. The stability-indicating properties of this system were checked with photodiode array detection and by comparison with capillary zone electrophoretic analysis.
Hoitink, M.A., Beijnen, J.H., Bult, A., van der Houwen, O.A.G.J., Nijholt, J., Underberg, W.J.M.   +5 more
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Modeling the degradation kinetics of ascorbic acid

Critical Reviews in Food Science and Nutrition, 2017
Most published reports on ascorbic acid (AA) degradation during food storage and heat preservation suggest that it follows first-order kinetics. Deviations from this pattern include Weibullian decay, and exponential drop approaching finite nonzero retention.
Micha, Peleg, Mark D, Normand, William R, Dixon, Timothy R, Goulette   +3 more
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Kinetic study and mechanism of Niclosamide degradation

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014
A spectrophotometric kinetic study of Niclosamide alkaline degradation as a function of drug concentration, alkaline concentration and temperature has been established utilizing double divisor-ratio spectra spectrophotometric method. The developed method allowed determination of Niclosamide in presence of its alkaline degradation products; namely; 2 ...
Hala E, Zaazaa, Maha M, Abdelrahman, Nouruddin W, Ali, Maimana A, Magdy, M, Abdelkawy   +4 more
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Degradation Kinetics and Metabolites of Carbamazepine in Soil

Environmental Science & Technology, 2013
The antiepileptic drug carbamazepine (CBZ) is one of the most frequently detected human pharmaceuticals in wastewater effluents and biosolids. Soil is a primary environmental compartment receiving CBZ through wastewater irrigation and biosolid application. In this study, we explored the transformation of CBZ to biologically active intermediates in soil.
Juying, Li, Laurel, Dodgen, Qingfu, Ye, Jay, Gan   +3 more
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The kinetics of pesticide degradation

1988
chap.
Soulas, Guy, Fournier, J.C.
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Nefopam Hydrochloride Degradation Kinetics in Solution

Journal of Pharmaceutical Sciences, 1990
A stability-indicating reversed-phase high performance liquid chromatographic method was developed for the detection of nefopam hydrochloride and its degradation products under accelerated degradation conditions. The degradation kinetics of nefopam hydrochloride in aqueous solutions over a pH range of 1.18 to 9.94 at 90 +/- 0.2 degrees C was studied ...
Y H, Tu, D P, Wang, L V, Allen
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Degradation kinetics and rheology of biodegradable polymers

Journal of Thermal Analysis and Calorimetry, 2009
Aliphatic polyesters are readily degradable polymers, hydrolysis being the dominant mechanism of degradation. On one side, this makes them extremely interesting for industrial applications in which degradability is required. On the other side, they present considerable processing problems due to their sensitivity to process and stocking conditions.
PARTINI M, ARGENIO O, COCCORULLO I, PANTANI, Roberto   +3 more
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Kinetic Treatments of Degradation

1996
Most photodegradation experiments are usually carried out in isothermal conditions, whereas polymers and plastics work in the environmental conditions within non-isothermal parameters. The rates of many degradation processes in polymers generally increase as the temperature rises.
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Degradation kinetics of 6-aminopenicillanic acid

Journal of Pharmaceutical Sciences, 1967
The degradation of 6-aminopenicillanic acid (6APA), as measured by the loss of the β-lactam ring, followed pseudo first-order kinetics with initial concentrations of 0.05–0.92 M and in the pH and temperature range of 5.8–6.6 and 35–90°, respectively. Higher orders of degradation rates were approached with increasing pH while the maximum stability of ...
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Olanzapine degradation kinetics in aqueous solution.

Die Pharmazie, 2011
The degradation kinetics of olanzapine as a function of pH and temperature has been studied by a spectrophotometric method. The degradation reaction rates were observed to follow first-order kinetics with respect to olanzapine. The hydrolytic reaction was shown to be hydrogen and hydroxide ion-catalyzed and the Arrhenius plots showed the temperature ...
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