Absorptiometric determination of sulphide ion

Rahim, S.A.; West, T.S.

doi:10.1016/0039-9140(70)80179-5

Cited by 10 publications

(9 citation statements)

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“…To evaluate the CsHSO 4 stability in hydrogen, the latter was passed at a flow rate of 0.5 ml/s through a layer of powdered CsHSO 4 mixed with Pt at a 100 : 1 weight ratio for 1 h at 175°ë . The H 2 S amount was determined using the procedure [11] and the amount of decomposed electrolyte was then estimated with reaction (1). We found that less than 2 wt % CsHSO 4 entered the reaction, which is the threshold for this method.…”

Section: Resultsmentioning

confidence: 99%

On the Possibility of Using Protonic Solid Electrolyte CsHSO4 in Hydrogen Fuel Cells

et al. 2005

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Electrochemical parameters of an H 2 |air fuel cell with a membrane of solid electrolyte CsHSO 4 or composites (1x ) CsHSO 4 / x SiO 2 ( x = 0.1-0.3) and different electrodes are measured at 175° C. The maximal power (3.5 mW/cm 2 at a voltage of 0.6 V) is obtained for a cell with platinum-black electrodes and an intermediate layer of a mixture of platinum black and the electrolyte material. In the absence of a platinum catalyst, CsHSO 4 and composites CsHSO 4 /SiO 2 are chemically stable in hydrogen at the operating temperature of the fuel cell.

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Section: Resultsmentioning

confidence: 99%

On the Possibility of Using Protonic Solid Electrolyte CsHSO4 in Hydrogen Fuel Cells

et al. 2005

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“…The complete table, however, is available on the online version of the journal on Synergy (see Supplementary Material section). Numbers in the Rahim's (1970) numbering system are given in parenthesis in the first column of Table 1 only for those stars which were observed photoelectrically in the Washington system (see Section 2). Fig.…”

Section: Ccd Ct 1 Photometric Datamentioning

confidence: 99%

“…The sizes of the plotting symbols are proportional to the T 1 brightness of the stars. The positions of 12 out of the 13 red giant candidates that we observed photoelectrically in the Washington system using Rahim's (1970) numbering system are identified in the figure. Star 158 falls outside the CCD field of view.…”

Section: Ccd Ct 1 Photometric Datamentioning

confidence: 99%

“…Magnitude and colour errors are the standard deviations of the mean, or the observed photometric errors for stars with only one measurement. Only for those stars photoelectrically observed, numbers in the Rahim's (1970) numbering system are given in parentheses in the first column. 12 of the 13 red giant candidates observed photoelectrically are identified using star numbers from Rahim (1970).…”

Section: Ccd Ct 1 Photometric Datamentioning

confidence: 99%

“…More recent evidence, however, places this cluster between 2.8 and 3.7 kpc from the Sun. The first study of NGC 2236 was performed by Rahim (1970), who obtained photographic photometry of 280 stars using the RGU system and concluded that this group of stars is a cluster with a diameter of about 9 arcmin located at d = 3430 pc from the Sun. He also derived E(G − R) = 0.51 and E(G − U) = 0.36.…”

Section: Introductionmentioning

confidence: 99%

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NGC 2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm

Clariá

Piatti

Parisi

et al. 2007

Monthly Notices of the Royal Astronomical Society

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New CCD photometry in the Washington system C and T1 passbands down to T1∼ 18.5 mag in the field of the northern open cluster NGC 2236 is presented. T1 magnitudes and C−T1 colours for a total of 1162 stars within an area of 13.6 × 13.6 arcmin2 were measured. These CCD data were supplemented with photoelectric CMT1T2 photometry of 13 red giant candidates. The comparison of the cluster (T1, C−T1) colour–magnitude diagram with theoretical isochrones computed for the Washington system yields E(C−T1) = 1.10 ± 0.10 and for log t= 8.80 (t= 600+100−40 Myr) and Z= 0.008. The derived E(C−T1) value implies E(B−V) = 0.55 ± 0.05. NGC 2236 is then located at 2.5 ± 0.5 kpc from the Sun beyond the Perseus spiral arm and at ∼10.8 kpc from the Galactic centre. A cluster angular diameter of 9.4 arcmin, equivalent to 6.8 pc, was estimated from star counts both within and outside the cluster field. We also derived from the stellar density profile a cluster core radius of rc= 1.7 arcmin (1.2 pc) and an annular corona of Δrc= 1.8rc (2.2 pc). Five independent Washington abundance indices yield a mean cluster metallicity of [Fe/H]=−0.3 ± 0.2, which is not only in reasonably good agreement with the one obtained from the isochrone fit, but also compatible with the existence of a radial abundance gradient in the Galactic disc. We examined the properties of a sample of 20 known open clusters aligned along the line‐of‐sight to NGC 2236. Berkeley 27 appears as the farthest and oldest cluster of the studied sample.

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Macdonald¹,

Lingard²

1993

Dictionary of Analytical Reagents

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Absorptiometric determination of sulphide ion

Cited by 10 publications

References 1 publication

On the Possibility of Using Protonic Solid Electrolyte CsHSO4 in Hydrogen Fuel Cells

On the Possibility of Using Protonic Solid Electrolyte CsHSO4 in Hydrogen Fuel Cells

NGC 2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm

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