| 1. |
- Choularton, T. W., et al.
(författare)
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The Great Dun Fell Cloud Experiment 1993 : An overview
- 1997
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Ingår i: Atmospheric Environment. - 1352-2310. ; 31:16, s. 2393-2405
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Tidskriftsartikel (refereegranskat)abstract
- The 1993 Ground-based Cloud Experiment on Great Dun Fell used a wide range of measurements of trace gases, aerosol particles and cloud droplets at five sites to study their sources and sinks especially those in cloud. These measurements have been interpreted using a variety of models. The conclusions add to our knowledge of air pollution, acidification of the atmosphere and the ground, eutrophication and climate change. The experiment is designed to use the hill cap cloud as a flow-through reactor, and was conducted in varying levels of pollution typical of much of the rural temperate continental northern hemisphere in spring-time.
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| 2. |
- Öberg, Sven, et al.
(författare)
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First stage of oxygen aggregation in silicon : the oxygen dimer
- 1998
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 81:14, s. 2930-2933
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Tidskriftsartikel (refereegranskat)abstract
- The structure and dynamic properties of the interstitial oxygen dimer in silicon are found using a combination of infrared spectroscopy and ab initio modeling. We find that the stable dimer consists of a pair of inequivalent weakly coupled interstitial oxygen atoms separated by a Si-Si bond. Two high frequency modes are decoupled in one 16O-18O combination but are strongly mixed in the other combination. A third lower lying mode involves the compression of the Si-Si bond joining the oxygen atoms and gives distinct modes in the mixed 16O-18O case.
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| 3. |
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| 4. |
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| 5. |
- Andersson, P, et al.
(författare)
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Testing an oral assessment guide during chemotherapy treatment in a Swedish care setting: a pilot study
- 1999
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Ingår i: Journal of Clinical Nursing. - : Wiley. - 1365-2702 .- 0962-1067. ; 8:2, s. 150-158
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Tidskriftsartikel (refereegranskat)abstract
- Oral complications are common in patients with haematological malignancies who undergo chemotherapy treatment. A pilot study including 16 haematological patients was carried out to evaluate the oral status using an Oral Assessment Guide (OAG) and to test the reliability of the OAG. The oral assessments were made daily by registered nurses at a Department of Internal Medicine in Sweden. Once a week a dental hygienist made the oral assessments independent of the registered nurses in order to provide data for calculations of inter-rater reliability. All patients had varying degrees of alterations in the oral cavity, especially in the mucous membranes, teeth/dentures and gums. The inter-rater agreement between the nurses and the dental hygienist was good for saliva and swallow, and moderate for voice and gums. Assessments to detect alterations in the oral cavity afford the opportunity for early and individualized interventions and may decrease the risk of oral infections. It is necessary to train the nurses to ensure high levels of reliability in the oral assessments. The OAG seems to be a reliable and clinical useful tool for assessing the oral cavity status and determining changes.
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| 6. |
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| 7. |
- Larhed, M, et al.
(författare)
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Rapid fluorous Stille coupling reactions conducted under microwave irradiation
- 1997
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Ingår i: Journal of Organic Chemistry. - UNIV PITTSBURGH,DEPT CHEM,PITTSBURGH,PA 15260. UNIV UPPSALA,CTR BIOMED,DEPT ORGAN PHARMACEUT CHEM,S-75123 UPPSALA,SWEDEN. : American Chemical Society (ACS). - 0022-3263 .- 1520-6904. ; 62:16, s. 5583-5587
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Tidskriftsartikel (refereegranskat)abstract
- Palladium-catalyzed fluorous Stille cross-coupling reactions with organic halides or triflates require only 90-120 s for completion when conducted under microwave irradiation. Comparable thermal reactions require about 1 day. Fourteen different coupling products were synthesized and isolated in good yields after three-phase extraction (FC-84, dichloromethane, water) and chromatography. The examples extend the scope of the fluorous Stille coupling with respect to both the tin and halide/triflate components. Applications in parallel synthesis are suggested.
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| 8. |
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| 9. |
- Moberg, C, et al.
(författare)
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Selectivity and reactivity in asymmetric allylic alkylation
- 1999
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Ingår i: Pure and Applied Chemistry. - Royal Inst Technol, Dept Chem, SE-10044 Stockholm, Sweden. Royal Danish Sch Pharm, DK-2100 Copenhagen, Denmark. Uppsala Univ, Ctr Biomed, Dept Organ Pharmaceut Chem, SE-75123 Uppsala, Sweden. Stockholm Univ, Arrhenius Lab, Dept Struct Chem, SE-10691 Stockholm, Sweden. : Walter de Gruyter GmbH. - 0033-4545 .- 1365-3075. ; 71:8, s. 1477-1483
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Tidskriftsartikel (refereegranskat)abstract
- 2-(1-Hydroxyalkyl)-6-oxazolyl-and 2-(1-alkoxyalkyl)-6-oxazolylpyridines serve as versatile ligands in the palladium-catalyzed allylic substitution of rac-1,3-diphenyl-2-propenyl acetate with dimethyl malonate as nucleophile. The enantioselectivity of the reaction is dependent on the conformation of the ligands, as deduced by NMR, X-ray crystallography and DFT calculations of palladium(II) complexes of the ligands. The reactions are slow, requiring up to four days reaction time. However, with the use of microwave flash heating, reaction times are reduced to 2 min, with only minor loss in stereoselectivity.
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| 10. |
- Olofsson, K, et al.
(författare)
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High-speed, highly fluorous organic reactions
- 1999
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Ingår i: Journal of Organic Chemistry. - Uppsala Univ, BMC, Dept Organ Pharmaceut Chem, SE-75123 Uppsala, Sweden. Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA. : American Chemical Society (ACS). - 0022-3263 .- 1520-6904. ; 64, s. 4539-
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Tidskriftsartikel (refereegranskat)
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| 11. |
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