| 1. |
- Block, Jan, 1973, et al.
(författare)
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Ultrathin Pd and Pt Films on W(211)
- 2003
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Ingår i: Thin Solid Films. ; 428, s. 47-
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Tidskriftsartikel (refereegranskat)abstract
- The transition metals Pd and Pt have, in bulk, approximately the samenearest neighbor distance as tungsten, so that ultrathin Pd or Pt filmscan be grown on W substrates without creating significant strain.In the present work we studyultrathin Pd and Pt films on the atomically rough W(211) surface byfirst-principles density-functional theory (DFT) methods.Previous experiments, summarized here, have shown that in filmsthicker than 1 physical monolayer (PML), tungsten atoms of the substratediffuse into the film to create alloys. Both toconfirm the alloy formation from theory and to help characterize the alloyswe present studies of Pd and Pt films with included W atoms. The DFT resultsallow us to indicate the energetically preferred alloy structures.
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| 3. |
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| 4. |
- Kieselbach, T, et al.
(författare)
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A peroxidase homologue and novel plastocyanin located by proteomics to the Arabidopsis chloroplast thylakoid lumen
- 2000
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Ingår i: FEBS Letters. - 0014-5793 .- 1873-3468. ; 480:2-3, s. 271-276
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Tidskriftsartikel (refereegranskat)abstract
- A study by two-dimensional electrophoresis showed that the soluble, lumenal fraction of Arabidopsis thaliana thylakoids can be resolved into 300 protein spots. After subtraction of low-intensity spots and accounting for low-level stromal contamination, the number of more abundant, lumenal proteins was estimated to be between 30 and 60. Two of these proteins have been identified: a novel plastocyanin that also was the predominant component of the total plastocyanin pool, and a putative ascorbate peroxidase. Import studies shamed that these proteins are routed to the thylakoid lumen by the Sec- and delta pH-dependent translocation pathways, respectively, In addition, novel isoforms of PsbO and PsbQ were identified.
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| 5. |
- Lundin, Magnus, et al.
(författare)
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Compton scattering from the deuteron and extracted neutron polarizabilities
- 2003
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Ingår i: Physical Review Letters. - 1079-7114. ; 90:19
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Tidskriftsartikel (refereegranskat)abstract
- Differential cross sections for Compton scattering from the deuteron were measured at MAX-Lab for incident photon energies of 55 and 66 MeV at nominal laboratory angles of 45degrees, 125degrees, and 135degrees. Tagged photons were scattered from liquid deuterium and detected in three NaI spectrometers. By comparing the data with theoretical calculations in the framework of a one-boson-exchange potential model, the sum and the difference of the isospin-averaged nucleon polarizabilities, alpha(N) + beta(N) = 17.4 +/- 3.7 and alpha(N) - beta(N) = 6.4 +/- 2.4 (in units of 10(-4) fm(3)), have been determined. By combining the latter with the global-averaged value for alpha(p) - beta(p) and using the predictions of the Baldin sum rule for the sum of the nucleon polarizabilities, we have obtained values for the neutron electric and magnetic polarizabilities of alpha(n) = 8.8 +/- 2.4(total) +/- 3.0(model) and beta(n) = 6.5 -/+ 2.4(total) -/+ 3.0(model), respectively.
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| 6. |
- Wahlberg [Schröder], Jessica, et al.
(författare)
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Structural Characterization of a Lipase-Catalyzed Copolymerization of epsilon-Caprolactone and D,L-Lactide
- 2003
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Ingår i: Biomacromolecules. - : American Chemical Society (ACS). - 1525-7797 .- 1526-4602. ; 4:4, s. 1068-1071
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Tidskriftsartikel (refereegranskat)abstract
- The copolymerization of epsilon-caprolactone (epsilon-CL) and D,L-lactide catalyzed by Candida antarctica lipase B was studied. Copolymerizations with different epsilon-CL-to-lactide ratios were carried out, and the product was monitored and characterized by MALDI-TOF MS, GPC, and H-1 NMR. The polymerization of epsilon-CL, which is normally promoted by C. antarctica lipase B, is initially slowed by the presence of lactide. During this stage, lactide is consumed more rapidly than epsilon-CL, and the incorporation occurs dimer-wise with regard to the lactic acid (LA) units. As the reaction proceeds, the relative amount of CL units in the copolymer increases. The nonrandom copolymer structure disappears with time, probably due to a lipase-catalyzed transesterification reaction. In the copolymerizations with a low content of lactide, macrocycles of poly(epsilon-caprolactone) and copolymers having up to two LA units in the ring were detected.
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