Density of Perchloric Acid Solutions

Markham, Aaron E.

doi:10.1021/ja01848a509

Cited by 9 publications

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“…As a check on the acid contents determined by titration, th e densities of the 45-, 50-, 55-, 60-, and 70-percent solutions were measured. The average difference between the acid contents determined by t itration and by density measurements, using the values of Markham [1] 2 and Smith and Goehler [2], was less than 0.03 p ercent acid except for one solution. The acid contents , .…”

Section: Density (A) Apparatusmentioning

confidence: 77%

“…From these plots the densities for every 5 percent of HCI04 were read and smoothed by plots of the differences. These density values are given in table 1. The values observed for the composition of the actual solutions are the points shown in figure 1.…”

Section: (B) Measurementsmentioning

confidence: 92%

“…These density values are given in table 1. The values observed for the composition of the actual solutions are the points shown in figure 1. …”

Section: (B) Measurementsmentioning

confidence: 92%

“…The volumes in the stems were respectively 0 .009Q5 and 0.00487 ml per division. Volumes r ead with a hand lens were 1 (1) R Esistivityofpcrchloric·acic1 solu tions from +50° to _60° C . driven horizontal stirrer and a hand-operated vertical stirrer were used .…”

Section: Density (A) Apparatusmentioning

confidence: 99%

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Properties of aqueous solutions of perchloric acid

Brickwedde¹

1949

J. RES. NATL. BUR. STAN.

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Several properties of the sys~e m HClOr H 20 for concentrations of H CIO, varying from 0 to 70 percent by weight have been m easured from -60 0 to -t-75°C . These properties include density, viscosity, electrical resistivity, and freezing temperat ures of 'the solutions. An empirical relat ion between electrical resistivity, kin ematic viscosity, and temperature has been found to be of the same fo rm a s the r elat ion which Vinal and Craig found for sulfuricacid solution s. The proper t ies of perchloric-acid solut ions of interest for battery work have been discllssed. Some m easurem en ts of electri cal resistivity of solutions containin g the lead sal t form ed as a perchloric-acid battery d ischarges have bee n m ea sured.

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Section: Density (A) Apparatusmentioning

confidence: 77%

Section: (B) Measurementsmentioning

confidence: 92%

“…These density values are given in table 1. The values observed for the composition of the actual solutions are the points shown in figure 1. …”

Section: (B) Measurementsmentioning

confidence: 92%

Section: Density (A) Apparatusmentioning

confidence: 99%

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Properties of aqueous solutions of perchloric acid

Brickwedde¹

1949

J. RES. NATL. BUR. STAN.

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“…H 2 O. These values, especially the value of 13.7% for the PCA stock, have been derived from the tables of perchloric acid density as a function of concentration [29] so as to yield a final PCA concentration of 3% upon five-fold dilution. The PCA stock solution is stored in an air-tight brown-glass bottle at room temperature.…”

Section: Methodsmentioning

confidence: 99%

A High-Sensitivity Method for Detection and Measurement of HMGB1 Protein Concentration by High-Affinity Binding to DNA Hemicatenanes

et al. 2008

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BackgroundProtein HMGB1, an abundant nuclear non-histone protein that interacts with DNA and has an architectural function in chromatin, was strikingly shown some years ago to also possess an extracellular function as an alarmin and a mediator of inflammation. This extracellular function has since been actively studied, both from a fundamental point of view and in relation to the involvement of HMGB1 in inflammatory diseases. A prerequisite for such studies is the ability to detect HMGB1 in blood or other biological fluids and to accurately measure its concentration.Methodology/Principal FindingsIn addition to classical techniques (western blot, ELISA) that make use of specific anti-HMGB1 antibodies, we present here a new, extremely sensitive technique that is based on the fact that hemicatenated DNA loops (hcDNA) bind HMGB1 with extremely high affinity, higher than the affinity of specific antibodies, similar in that respect to DNA aptamers. DNA-protein complexes formed between HMGB1 and radiolabeled hcDNA are analyzed by electrophoresis on nondenaturing polyacrylamide gels using the band-shift assay method. In addition, using a simple and fast protocol to purify HMGB1 on the basis of its solubility in perchloric acid allowed us to increase the sensitivity by suppressing any nonspecific background. The technique can reliably detect HMGB1 at a concentration of 1 pg per microliter in complex fluids such as serum, and at much lower concentrations in less complex samples. It compares favorably with ELISA in terms of sensitivity and background, and is less prone to interference from masking proteins in serum.ConclusionThe new technique, which illustrates the potential of DNA nanoobjects and aptamers to form high-affinity complexes with selected proteins, should provide a valuable tool to further investigate the extracellular functions of HMGB1 and its involvement in inflammatory pathologies.

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CaSO4 - CsClO4

Synowietz¹

Densities of Binary Aqueous Systems and Heat Capacities of Liquid Systems

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Density of Perchloric Acid Solutions

Cited by 9 publications

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Properties of aqueous solutions of perchloric acid

Properties of aqueous solutions of perchloric acid

A High-Sensitivity Method for Detection and Measurement of HMGB1 Protein Concentration by High-Affinity Binding to DNA Hemicatenanes

CaSO4 - CsClO4

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