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| 3. |
- Norén, L, et al.
(författare)
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Crystallographoc and magnetic characterisation of the TlCo2Se2-TlCu2Se2 solid solution phase field
- 2000
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Ingår i: 13th International Conference on Solid Compounds of Transition Elements. ; , s. P-A09
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Konferensbidrag (populärvet., debatt m.m.)abstract
- The pseudo-binary system TlCo2Se2 - TlCu2Se2 has been studied in some detail, with the focus on the cobalt-rich end. [...]We have done susceptibility measurements as well as neutron diffraction to analyse the magnetic interactions. [...] TEM discloses that, at least near 50% copper, there are strong modulations to the ordered crystallographic 3-D description.
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| 4. |
- Norén, Torbjörn, et al.
(författare)
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Molecular epidemiology of hospital-associated and community-acquired Clostridium difficile infection in a Swedish county
- 2004
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Ingår i: Journal of Clinical Microbiology. - : American Society for Microbiology. - 0095-1137 .- 1098-660X. ; 42:8, s. 3635-3643
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Tidskriftsartikel (refereegranskat)abstract
- All episodes of Clostridium difficile associated diarrhea (CDAD) diagnosed in a defined population of 274,000 including one tertiary and two primary hospitals and their catchment areas were studied during 12 months. The annual CDAD incidence in the county was 97 primary episodes per 100,000, and 78% of all episodes were classified as hospital associated with a mean incidence of 5.3 (range, 1.4 to 6.5) primary episodes per 1,000 admissions. The incidence among hospitalized individuals was 1,300-fold higher than that in the community (33,700 versus 25 primary episodes per 100,000 persons per year), reflecting a 37-fold difference in antibiotic consumption (477 versus 13 defined daily doses [DDD]/1,000 persons/day) and other risk factors. Three tertiary hospital wards with the highest incidence (13 to 36 per 1,000) had CDAD patients of high age (median age of 80 years versus 70 years for other wards, P < 0.001), long hospital stay (up to 25 days versus 4 days), or a high antibiotic consumption rate (up to 2,427 versus 421 DDD/1,000 bed days). PCR ribotyping of C. difficile isolates available from 330 of 372 CDAD episodes indicated nosocomial acquisition of the strain in 17 to 27% of hospital-associated cases, depending on the time interval between index and secondary cases allowed (2 months or up to 12 months), and only 10% of recurrences were due to a new strain of C. difficile (apparent reinfection). In other words, most primary and recurring episodes were apparently caused by the patient's endogenous strain rather than by one of hospital origin. Typing also indicated that a majority of C. difficile strains belonged to international serotypes, and the distribution of types was similar within and outside hospitals and in primary and relapsing CDAD. However, type SE17 was an exception, comprising 22% of hospital isolates compared to 6% of community isolates (P = 0.008) and causing many minor clusters and a silent nosocomial outbreak including 36 to 44% of the CDAD episodes in the three high-incidence wards.
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| 6. |
- Klingberg, Gunilla, 1960, et al.
(författare)
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Oral manifestations in 22q11 deletion syndrome.
- 2002
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Ingår i: International journal of paediatric dentistry / the British Paedodontic Society [and] the International Association of Dentistry for Children. - 0960-7439. ; 12:1, s. 14-23
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The aims of this study were to investigate and describe oral manifestations in 22q11 deletion syndrome, and to relate the findings to medical conditions. DESIGN: Cross-sectional. SAMPLE AND METHODS: Fifty-three consecutive patients from Sweden referred to the Sahlgrenska University Hospital during a 3-year period were included, median age 8 yrs (range 2-43; mean age 11.09). All but six patients were children 3-19-years-old. The patients were examined concerning oral mucosa, dental anomalies, dental caries, occlusal development, and eruption of the teeth. The clinical findings were compared to medical data and case history. RESULTS: Dental anomalies were registered in high numbers. Enamel hypoplasia was found in 16 patients. In 13 cases this was documented in primary teeth, of which 10 patients had symmetrical and chronological defects. Enamel hypomineralization was found in 23 patients and was equally common in both primary and permanent teeth. The use of computerized inductive analyses revealed that enamel hypoplasia was associated with medical conditions like preterm birth and congenital heart malformation while hypomineralization was associated with more diffuse conditions like frequent infections. Hypodontia was registered in seven patients, while eight had aberrant tooth shape, and nine patients presented delayed tooth eruption. The patients had an average of 4.6 carious or filled teeth and the oral health was assessed as impaired in 15 patients who had severe dental caries (5-18 carious teeth or multiple active incipient caries lesions). CONCLUSIONS: In 22q11 deletion syndrome the oral cavity is affected by anomalies in dental enamel, tooth shape, numbers of teeth, and eruption. Dental health problems due to caries are common. This is of special importance as patients with 22q11 deletion syndrome frequently present with congenital heart malformations and immunological problems.
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| 8. |
- Noren, L, et al.
(författare)
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Incommensurate Cu/Co ordering in the TlCo2-xCuxSe2 (x approximately 1) system
- 2000
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Ingår i: JOURNAL OF SOLID STATE CHEMISTRY. - 0022-4596. ; 151:2, s. 260-266
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Tidskriftsartikel (refereegranskat)abstract
- Cu/Co ordering in TlCo2-xCuxSe2, (x similar to 1) has been investigated using electron and X-ray powder diffraction, The average structure of the x = 1 compound call be indexed on an F-centered orthorhombic cell, a = 5.5518(6) Angstrom, b = 5.4755(5) Angstrom
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| 9. |
- Noren, L, et al.
(författare)
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Size or polarisability effects? A comparative study of TlCu7S4 and TlCu7Se4
- 2001
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Ingår i: JOURNAL OF ALLOYS AND COMPOUNDS. - 0925-8388. ; 314:1-2, s. 114-123
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Tidskriftsartikel (refereegranskat)abstract
- The room temperature structures of the tetragonal compounds TlCu7S4 and TlCu7Se4 have been reinvestigated on various fronts, by experiment and theoretical calculations. Neutron powder diffraction data have been analysed by Rietveld profile refinement and Reverse Monte Carlo modelling. Both approaches show substantial disorder on the copper site that corresponds to 25% vacancies in the common crystallographic description, and more so inthe thiocuprate than in the selenocuprate.
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