Results 221 to 230 of about 581,287 (268)
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Structure of Pyruvate in Aqueous Solution
Nature, 1958IN 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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Determination of heparin in aqueous solutions
Journal of Clinical Pharmacy and Therapeutics, 1998To 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 +4 more
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An osmometer for aqueous biopolymer solutions
Analytical Biochemistry, 1989A sensitive osmometer for the study of the osmotic pressure of aqueous protein solutions is presented. Equilibrium is reached within 1 to 2 h and is reproducible to about 1 N.m-2 (= 0.01 cm H2O). The method allows the determination of dissociation constants of proteins down to 1 x 10(-8) M.
H, Schönert, J J, Origer
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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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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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Degradation of busulfan in aqueous solution
Journal of Pharmaceutical and Biomedical Analysis, 1986The 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, 1997Abstract 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. +5 more
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Degradation of Chlorambucil in Aqueous Solution
Journal of Pharmaceutical Sciences, 1980The 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 +3 more
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Degradation of dacarbazine in aqueous solution
Journal of Pharmaceutical and Biomedical Analysis, 1992The 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 +3 more
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Solubility of Doxycycline in Aqueous Solution
Journal of Pharmaceutical Sciences, 1979The solubility of doxycyline monohydrate and doxycycline hydrochloride dihydrate was investigated in aqueous solution. The hydrochloride dihydrate salt was isolated and identified from solutions initially containing doxycycline hyclate in water.
J B, Bogardus, R K, Blackwood
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Radiolysis of Aqueous Solutions of Glycine
Radiation Research, 1958A detailed mechanism for the radiolysis of the glycine-water system is developed. The treatment is based on the various literature sources and on new experimental findings which are described. It is proposed that the indirect action of radiation on glycine in oxygenfree solution results in formation of the free-radical intermediates CH/sub 2/COOH and ...
B M, WEEKS, W M, GARRISON
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