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Diagnosis, Appraisal, Repair and Management
Published in Ian Sims, Alan Poole, Alkali-Aggregate Reaction in Concrete: A World Review, 2017
Bruno Godart, Mario R de Rooij
Uranyl acetate (uranium) solution reacts with ASR gel and can be used as a screening test for ASR gel in laboratory or on-site. The reaction produces a fluorescing constituent visible in ultraviolet light. However, some gels may not be detected, while others producing a fluorescence are not always ASR gel. It has also to be remembered that ASR gel is water soluble and may have been washed away. Therefore AAR should not be diagnosed by this method alone. Uranyl acetate (UO2(C2H3O2)2.2H2O) is an internationally regulated substance, which is radioactive and hazardous to both human health and natural environment. Precautions should be taken for its storage, use and disposal. UV light will damage sight and protective glasses should be used. For further information on the method, see LCPC (1993).
Selective separation of V(IV) from its solutions using modified cellulose
Published in Journal of Dispersion Science and Technology, 2020
Ahmed Yousif, Adel El-Afandy, Galal Dabbour, Amal E. Mubark
Cellulose, glycidylmethacrylate (GMA) (C7H10O3), ceric ammonium nitrate (CAN) ((NH)4Ce(NO3)6), and leucine, arsenazo (III) were purchased from Aldrich while dodeca-tungestophosphoric acid was obtained from Fisher Scientific. All chemicals were used as received. Vanadium oxide (V2O5) was used as a source for vanadium. Uranyl acetate (UO2 (CH3COO)2 2H2O) was used as a source of uranium. A stock solution of 1000 mg/L of vanadium ions was prepared by dissolving 1.7851 g of V2O5 in 20 mL H2SO4 then diluted to 1 liter using double distilled water while, preparing stock solution of 1000 mg/L of uranium ions which was achieved by dissolving 1.782 g of uranyl acetate in 1 L of 0.05 M H2SO4. All other chemicals were Prolabo products. The concentrations of V(IV) and U(VI) ions were estimated spectrophotometrically using dodeca-tungestophosphoric acid and Arsenazo (III) reagents, respectively.[23]
Peptide-enabled receptor-binding-quantum dots for enhanced detection and migration inhibition of cancer cells
Published in Journal of Biomaterials Science, Polymer Edition, 2020
Ruijuan Zu, Xiaocui Fang, Yuchen Lin, Shilin Xu, Jie Meng, Haiyan Xu, Yanlian Yang, Chen Wang
10 µL of QDs (100 nM) and 10 µL of E5@QDs (QDs: 100 nM, E5: 1 μM) were dropped over 200-mesh carbon grids (Zhongjingkeyi Ltd., Beijing, China) at room temperature. After 30 min for adsorption at 25 °C, the excessive solution on carbon grids was removed carefully. Then samples were stained with 2% (w/v) uranyl acetate for 1 min at room temperature and followed by transmission electron microscopy (TEM) observation using Tecnai G2 20 S-TWIN (FEI, USA).