نتایج جستجو برای: were 0025 m h2so4
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Sulphuric acid and organic vapours have been identified as the key components in the ubiquitous secondary new particle formation in the atmosphere. In order to assess their relative contribution and spatial variability, we analysed altogether 36 new particle formation events observed at four European measurement sites during EUCAARI campaigns in 2007–2009. We tested models of several different ...
fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...
Department of Infectious Diseases, Osaka Prefectural Institute of Public Health, Osaka 537-0025; Osaka Prefectural Dog Management Office, Osaka 537-0025; Food Safety Promotion Division, Department of Public Health and Welfare, Osaka Prefectural Government, Osaka 540-8570; and Department of Bacterial Pathogenesis and Infection Control, National Institute of Infectious Diseases, Tokyo 208-0011, J...
We report the discovery of J0121+0025, an extremely luminous and young star-forming galaxy (M_UV = -24.11, log[L_Lya / erg s^-1] 43.8) at z 3.244 showing copious Lyman continuum (LyC) leakage (f_esc,abs ~ 40%). High signal-to-noise ratio rest-frame UV spectroscopy with Gran Telescopio Canarias reveals a high significance (7.9 sigma) emission below limit (< 912A), flux density level f_900A 0.78 ...
0019-1035/$ see front matter Published by Elsevier doi:10.1016/j.icarus.2011.06.008 ⇑ Corresponding author. Fax: +1 301 286 0440. E-mail address: [email protected] (M.J. Loeffl We report laboratory studies on the 0.8 MeV proton irradiation of ices composed of sulfuric acid (H2SO4), sulfuric acid monohydrate (H2SO4 H2O), and sulfuric acid tetrahydrate (H2SO4 4H2O) between 10 and 180 K. Usin...
A highly efficient reduction process of Cr (VI) with biochar was conducted in this paper. The results showed that nearly 100% reduced at selected reaction conditions: Dosage m (C)/m(Cr) = 3.0, temperature 90 °C, time of60 min, and concentration H2SO4 20 g/L. kinetics analysis demonstrated the fitted well pseudo-first-order model apparent activation energy calculated to be 40.24 kJ/mol. Response...
The extraction of technetium species at oxidation state lower than +7 has been examined in sulfuric and sulfuric/nitric acid solutions using UV-Vis spectroscopy and optically transparent thin layer cell (RVC-OTTLE). Soluble Tc(III), TcO2+ and [Tc2O2]3+ species with absorption bands at 420-450, 400, and 502 nm, respectively, were detected as products of pertechnetates electroreduction. The distr...
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