| 1. |
- Ablikim, M., et al.
(författare)
-
Measurements of (XcJ)-> K+K-K+K- decays
- 2006
-
Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 642:3, s. 197-202
-
Tidskriftsartikel (refereegranskat)abstract
- Using 14M psi(2S) events taken with the BESII detector, chi(cJ) -> 2(K+K-) decays are studied. For the four-kaon final state, the branching fractions are B(chi(c0,1,2) ->.2(K+K-)) = (3.48 +/- 0.23 +/- 0.47) x 10(-3), (0.70 +/- 0.13 +/- 0.10) x 10(-3), and (2.17 +/- 0.20 +/- 0.31) x 10(-3). For the phi K+K- final state, the branching fractions, which are measured for the first time, are B(chi(c0,1,2) -> phi K+K-) = (1.03 +/- 0.22 +/- 0.15) x 10(-3), (0.46 +/- 0.16 +/- 0.06) x 10(-3), and (1.67 +/- 0.26 +/- 0.24) x 10(-4). For the phi phi final state, B(chi(c0,2) -> phi phi) = (0.94 +/- 0.21 +/- 0.13) x 10(-3) and (1.70 +/- 0.30 +/- 0.25) x 10(-3).
|
|
| 2. |
- Yuan, Jinliang, et al.
(författare)
-
Analysis of parameter effects on chemical reaction coupled transport phenomena in SOFC anodes
- 2009
-
Ingår i: Heat and Mass Transfer. - : Springer Science and Business Media LLC. - 1432-1181 .- 0947-7411. ; 45:4, s. 471-484
-
Tidskriftsartikel (refereegranskat)abstract
- Mass, heat and momentum transport processes are strongly coupled by internal chemical reforming reactions in planar design solid oxide fuel cell (SOFC) anodes. In this paper, a three-dimensional computational fluid dynamics approach is applied to simulate and analyze reforming reactions of methane and various transport processes in a duct relevant for SOFC anodes. The results show that the anode duct design and operating parameters, grouped as three characteristic ratios, are significant for the chemical reactions and further for multi-species distribution, fuel gas transport and heat transfer in the sub-domains of the anode.
|
|
| 3. |
- Chen, Guohe, et al.
(författare)
-
In-field determination of nanomolar nitrite in seawater using a sequential injection technique combined with solid phase enrichment and colorimetric detection
- 2008
-
Ingår i: Analytica Chimica Acta. - : Elsevier BV. - 1873-4324 .- 0003-2670. ; 620:1-2, s. 82-88
-
Tidskriftsartikel (refereegranskat)abstract
- A novel sequential injection method for the determination of nitrite at nanomolar level in seawater samples has been developed. The pink azo compound was formed based on the Griess reaction and quantitatively adsorbed onto a Sep-Pak C18 cartridge. The enriched azo compound was rinsed with water and ethanol (28%, v/v) in turn, and then eluted with an eluent containing 26.6% (v/v) ethanol and 0.108mol L-1 H2SO4. Finally the azo compound was measured using a spectrophotometer at 543 nm. Under the optimized conditions, the linear calibration ranges were 0.71-42.9 nmol L-1 for a 150-mL sample and 35.7-429 nmol L-1 for a 15-mL sample. The relative standard deviation of 8 measurements was 1.44% for 14.3 nmol L-1 nitrite. For the 150 mL sample, the detection limit was estimated to be 0.1 nmol L-1. The throughput of the method was about 4 samples per hour. The proposed method has been successfully applied to the in-field determination of nanomolar concentrations of nitrite in seawater. (c) 2008 Elsevier B.V. All rights reserved.
|
|
