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- Ramstein, B, et al.
(författare)
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Inclusive H-2(He-3,t) Reaction at 2 GeV
- 1999
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Ingår i: European Physical Journal A. Hadrons and Nuclei. - 1434-6001. ; 6, s. 225-225
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Tidskriftsartikel (refereegranskat)
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- Vesecky, S.M., et al.
(författare)
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Catalytic reduction of nitrogen oxides by methane over Pd(110)
- 1996
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Ingår i: Journal of Physical Chemistry. - : American Chemical Society (ACS). - 0022-3654 .- 1541-5740. ; 100:37, s. 15242-15246
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Tidskriftsartikel (refereegranskat)abstract
- The catalytic reduction of NO with CH4 has been studied over Pd(110) in the temperature range 700-800 K at a total pressure of 10 Torr. The rate of NO reduction is at a maximum at a high CH4/NO stoichiometry (8/1) and at a minimum at a low (1/4) CH4/NO ratio. Correspondingly, the activation energy for NO reduction decreases with increasing CH4/NO ratio, and the reaction orders are -1.0 in NO and +1.5 in CH4. Unlike NO, the rate of N2O reduction is at a maximum at low CH4 pressures, and the reaction orders are positive in N2O and negative in CH4. In the presence of oxygen, NO is oxidized to NO2, which is in turn reduced back to NO by CH4. The NO/NO2 oxidation/reduction cycle has the effect of delaying NO reduction to N2 (or N2O) until all of the O2 is consumed.
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6. |
- Zhang, H, et al.
(författare)
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Antisense inhibition of the photosystem I antenna protein Lhca4 in Arabidopsis thaliana
- 1997
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Ingår i: Plant Physiology. - 0032-0889 .- 1532-2548. ; 115:4, s. 1525-1531
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Tidskriftsartikel (refereegranskat)abstract
- The function of Lhca4, a gene encoding the photosystem I type IV chlorophyll a/b-binding protein complex in Arabidopsis, was investigated using antisense technology. Lhca4 protein was reduced in a number of mutant lines and abolished in one. The inhibition of protein was not correlated with the inhibition of mRNA. No depletion of Lhca1 was observed, but the low-temperature fluorescence emission spectrum was drastically altered in the mutants. The emission maximum was blue-shifted by 6 nm, showing that chlorophyll molecules bound to Lhca4 are responsible for most of the long-wavelength fluorescence emission. Some mutants also showed an unexplainable delay in flowering time and an increase in seed weight.
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