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Abstract  

The present investigation has been carried out to study the effect of -radiation on the absorption spectra of aerated solutions of alizarin complexone dye at different concentrations and pH values. The change in optical density for dosimeter concentrations ranging from 5·10–2 to 15·10–2 mM was observed to respond linearly to the increase of absorbed gamma dose. With the proper choice of concentration and pH value, the system is suitable for the accurate measurement of absorbed doses up to 5.3 kGy. This study includes also an investigation of the effect of environmental conditions on the stability of the dye solutions at different pH values during storage. Suggestions are made for possible low radiation dosimetry by means of spectrophotometric analysis of the absorption spectra.

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-01), adipogenesis (Gibco, A10070-01), and chondrogenesis differentiation medium (Gibco A10071-01), followed by incubation for 2 weeks with the induction medium replaced thrice a week. The staining procedure with Oil Red O, Alcian Blue and Alizarin Red S were done

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Abstract  

The chemical behaviour of the95Nb atoms formed by the beta decay of the95Zr-Alizarin S and95Zr-TTA (2-thenoyltrifluoracetone) complexes were investigated. The retention values of95Nb which not complexed with organic reagents at working pH were determined. The values observed were 100% and 80%, respectively. The results are discussed and interpreted to explain the different behaviour on the basis of internal energy values and solvent effects.

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analysis measurements. The activity of both the soluble and immobilized enzyme was tested in the oxidation of Alizarin Red S (ARS) with H 2 O 2 . ARS is an industrially important widely used anthraquinone polluting dye, whose inexpensive and environmental

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medium was replaced every 3 days. Then, the cells were fixed with formalin and stained with alizarin red dye which stains calcium-rich mineral deposits excreted by differentiated cells. After washing the wells thrice with PBS, 400 μl 0.5N HCl–5% sodium

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Abstract  

A rapid, selective and simple method has been developed for the determination of Sc in rock samples by thermal neutron activation analysis, employing substoichiometric solvent extraction of Sc(III) with alizarin into 1-octanol. Two samples and a standard can be processed and counted within three hours.

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Abstract  

Chromium has been determined in environmental samples. The method described here involves the irradiation of environmental samples and a g quantity of standard with thermal neutrons at the self-serve position in the CIRUS reactor, followed by dissolution of the sample and standard in the presence of a milligram amount of carrier. Both the sample and the standard are subjected to substoichiometric extraction under controlled experimental conditions with alizarin into cyclohexane. An aliquot of the organic phase was counted on a gamma-ray spectrometer. The concentration of Cr in water samples from Bombay and Karad City, and the accuracy, precision and sensitivity of the method are discussed.

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JPC - Journal of Planar Chromatography - Modern TLC
Authors: Jasenka Živko-Babić, Marica Medić-Šarić, Ana Mornar, Marko Jakovac, Ivona Jasprica and Srećko Turina

Titanium as the pure metal or as commercial titanium alloys has been widely used in dentistry. To determine the composition of incorporated reconstructions there is a need for non-destructive sampling and identification of unknown or suspect elements. This paper reports an analytical procedure for detection of titanium. The method involves anodic sampling, and separation and identification of titanium by thin-layer chromatography (TLC) on precoated cellulose layers. Two thin plates and one cast of elemental titanium and one dental alloy containing titanium were analyzed. Chromatograms of samples were developed with a mixture of iso -amyl alcohol, acetonitrile and hydrochloric acid as mobile phase. Excellent detection and identification of titanium as a pink spot was achieved after spraying with a saturated ethanolic solution of alizarin and exposure to NH 3 vapor.

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Abstract  

The molybdate β-Bi2Mo2O9 synthesised by solid state reaction showed photocatalytic activity for the degradation of rhodamine B (rhB), indigo carmine (IC) and alizarin red S (ARS) through a photosensitization process of the organic dye. The activity of β-Bi2Mo2O9 to the degradation of organic dyes was compared with the corresponding γ-Bi2MoO6 phase. It was found that activities exhibited by β-Bi2Mo2O9 were four times higher than that obtained by γ-Bi2MoO6. The extent of mineralization was determined by means of total organic carbon (TOC) measurements, which showed a satisfactory TOC reduction (40%, within 50 h) for rhB.

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. Dawson, A. B. (1926): A note on the staining of the skeleton of cleared specimens with alizarin red S. Stain Techn. 1, 123-124. A note on the staining of the skeleton of cleared specimens with alizarin red S

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