Results 251 to 260 of about 4,352,172 (301)

Hydrolysis of sulphonamides in aqueous solutions

Journal of Hazardous Materials, 2012
Hydrolysis is one of the most common reactions controlling abiotic degradation and is one of the main paths by which substances are degraded in the environment. Nevertheless, the available information on this process for many compounds, including sulphonamides (a group of antibiotic drugs widely used in veterinary medicine), is very limited.
Anna Białk-Bielińska, Stefan Stolte, Marianne Matzke, Aleksandra Fabiańska, Joanna Maszkowska, Marta Kołodziejska, Beata Liberek, Piotr Stepnowski, Jolanta Kumirska   +8 more
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Structure of Pyruvate in Aqueous Solution

Nature, 1958
IN a recent publication and its addendum by Dickens and Williamson and by Bellamy and Williams1, it was reported that the infra-red spectra of lithium pyruvate and hydroxypyruvate in the solid state show no ketonic carbonyl peak, and it was suggested that these compounds exist as the hydrate, RCH2C(OH)2COO−Li+, in the solid and in aqueous solution and ...
W P, JENCKS, J, CARRIUOLO
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An Aqueous Solution?

Archives of Dermatology, 1977
To the Editor.— I am not really enlightened by Bernard Ackerman's reply to Dr Samuelson's query in the JulyArchives(111:925, 1975). If the antigens were "suspended in an aqueous solution," one immediately wonders "a solution of what?" If it was a solution of nothing or if the antigens were not in fact suspended, but dissolved, then it would have been ...
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Determination of heparin in aqueous solutions

Journal of Clinical Pharmacy and Therapeutics, 1998
To develop a volumetric method for assaying heparin in aqueous media.Heparin is precipitated out with an aqueous solution of an organic amine by titration and the end-point is based on the measurement of the medium dielectric permittivity. We studied the titration of a 500 IU/ml heparin solution with a 0.08 M cetylpyridinium chloride solution at pH 6.8.
B, Demoré, E, Benoit, P, Maincent, M, Hoffman, J, Bessière   +4 more
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Degradation of busulfan in aqueous solution

Journal of Pharmaceutical and Biomedical Analysis, 1986
The influence of pH, phosphate buffer components and temperature on the degradation rate of busulfan was studied. The analysis was performed using gas chromatography with electron capture detection and reversed-phase liquid chromatography with radioactivity monitoring.
M, Hassan, H, Ehrsson
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Degradation of suramin in aqueous solutions

International Journal of Pharmaceutics, 1997
Abstract The stability of suramin, a symmetrical urea derivative with a broad pharmacological profile, was investigated in aqueous solution in the pH/H 0 range −1–13, with a validated stability-indicating high-performance liquid chromatographic assay.
Kettenes-van den Bosch, J.J., Hop, E., Overbeek, W., Underberg, W.J.M., Beijnen, J.H., Bult, A.   +5 more
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Degradation of Chlorambucil in Aqueous Solution

Journal of Pharmaceutical Sciences, 1980
The stability of chlorambucil and its degradation product 4-[p-(2-chloroethyl-2-hydroxyethylamino)phenyl]butyric acid (I) was studied using reversed-phase high-pressure liquid chromatography. The degradation rate of chlorambucil was unaffected by pH between pH 5 and 10 but decreased at lower pH. The degradation rates of chlorambucil and I differed only
H, Ehrsson, S, Eksborg, I, Wallin, S O, Nilsson   +3 more
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Degradation of dacarbazine in aqueous solution

Journal of Pharmaceutical and Biomedical Analysis, 1992
The effects of initial concentration (0.05-5.0 mg ml-1, 2.5 x 10(-4)-0.025 M) (pH 1-13), buffer concentration (0.01-0.075 M), light, antioxidants and co-solvents on the degradation of dacarbazine in aqueous solution were investigated at 37 degrees C. Liquid chromatography was used to monitor the degradation of dacarbazine as well as the appearance of ...
B V, Shetty, R L, Schowen, M, Slavik, C M, Riley   +3 more
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Effects of potentization in aqueous solutions

British Homoeopathic journal, 1999
Over the past two decades, research into structure formation and structure conservation in water has created a significant interest among the homeopathy research community. The formation of sustained static and dynamic structures in aqueous solutions is thought to be synonymous with the possible storage of information in associated liquids.
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Aqueous Solutions

Science, 1981
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