Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P39060 (endostatin)
 2,284 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The electrochemical reduction of pipamperone has been carried out in aqueous solution in KNO(3) (0.1 mol l(-1)) by differential-pulse polarography (DPP). Pipamperone exhibits a well-defined irreversible reduction peak at -1.3 V/ref. The influence of pH on the reduction of pipamperone was studied in Britton-Robinson buffer (pH range 2-10). A method for the analysis of pipamperone in KNO(3) (0.1 mol l(-1)), which allows quantification over the range 1.6x10(-5)-2.0x10(-4) mol l(-1), was proposed and successfully applied to the determination of pipamperone in tablets with mean recovery and relative standard deviation (R.S.D.) of 100.35 and 0.49%, respectively.
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PMID:Differential-pulse polarography determination of pipamperone in pharmaceutical formulations. 1240 34

In the presence of selenium(IV) and molybdenum(VI) a new polarographic peak appears which corresponds to a hydrogen catalytic wave. By differential pulse polarography a single, sharp peak at about -1.1 V is obtained, allowing trace determination of selenium(IV) and molybdenum(VI) in the range 1x10(-6)-5.0x10(-9) M with a linear calibration and a detection limit of 1.5x10(-9) M. The optimum conditions are found to be 0.1 M KNO(3) and a pH of about 3.2 (Britton-Robinson buffer). There is no serious interference from some ions when present at 1.0-40 times that of molybdenum. At higher amounts of interfering ions the interference is eliminated by the addition of EDTA.
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PMID:Differential pulse polarographic determination of trace selenium(IV) and molybdenum(VI) using the catalytic hydrogen wave. 1896 51