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| 2. |
- Angelopoulos, Angelos, et al.
(author)
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Dispersion relation analysis of the neutral kaon regeneration amplitude in carbon
- 1999
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In: European Physical Journal C. - : Springer Berlin/Heidelberg. - 1434-6044 .- 1434-6052. ; 10:1, s. 19-25
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Journal article (peer-reviewed)abstract
- We apply a forward dispersion relation to the regeneration amplitude for kaon scattering on 12" style="position: relative;" tabindex="0" id="MathJax-Element-1-Frame" class="MathJax">12C using all available data. The CPLEAR data at low energies allow the determination of the net contribution from the subthreshold region which turns out to be much smaller than earlier evaluations, solving a long standing puzzle.
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| 3. |
- Angelopoulos, A., et al.
(author)
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K 0–KÌ„0 mass and decay-width differences : CPLEAR evaluation
- 1999
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In: Physics Letters B. - : Elsevier. - 0370-2693 .- 1873-2445. ; 471:2, s. 332-338
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Journal article (peer-reviewed)abstract
- The CPT-violation parameters Re(δ) and Im(δ) determined recently by CPLEAR are used to evaluate the K0– mass and decay-width differences, as given by the difference between the diagonal elements of the neutral-kaon mixing matrix (M−iΓ/2). The results – GeV and GeV – are consistent with CPT invariance. The CPT invariance is also shown to hold within a few times 10−3–10−4 for many of the amplitudes describing neutral-kaon decays to different final states.
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| 4. |
- Apostolakis, A, et al.
(author)
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A determination of the CP violation parameter η+- from the decay of strangeness-tagged neutral kaons
- 1999
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In: Physics Letters B. - : Elsevier. - 0370-2693 .- 1873-2445. ; 458:4, s. 545-552
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Journal article (peer-reviewed)abstract
- LEAR offered unique opportunities to study the symmetries which exist between matter and antimatter. At variance with other approaches at this facility, CPLEAR was an experiment devoted to the study of CP, T and CPT symmetries in the neutral-kaon system. A variety of measurements allowed us to determine with high precision the parameters which describe the time evolution of the neutral kaons and their antiparticles, including decay amplitudes, and the related symmetry properties. Limits concerning quantum-mechanical predictions (EPR, coherence of the wave function) or the equivalence principle of general relativity have been obtained. An account of the main features of the experiment and its performances is given here, together with the results achieved.
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| 5. |
- Arvidsson, Thomas, et al.
(author)
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Autism in 3-6-Year-Old Children in a Suburb of Goteborg, Sweden
- 1997
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In: Autism. - : SAGE Publications. - 1362-3613 .- 1461-7005. ; 1:2, s. 163-173
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Journal article (peer-reviewed)abstract
- 1941 ofthe 3-6-year-old children living in a community outside Gbteborg on the Swedish west coast were screened with a view to identifying all individuals with severe degrees of autistic behaviour. All children in the population were known to well baby clinic staff, and any child suspected of suffering from autism was referred to a specialized clinical research team. The nurses and doctors working in the well baby clinics were well informed about autism. Clinical and ADI-R diagnoses of autism were established after thorough clinical assessments of each suspected case. All children were seen at least twice, and all were over the age of 3 years at the time of diagnosis. The general population prevalence for autism was 3 I in I o,ooo children (9; percent confidence interval 7/ g;). Classic Kanner autism was found in I o in Io,ooo children (9; percent confidence interval-4/24). These rates appear to reflect higher rates than previously reported. Some reasons for the possibly higher prevalence are discussed.
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| 6. |
- Berndtson, E., et al.
(author)
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A 1-year epidemiological study of campylobacters in 18 Swedish chicken farms
- 1996
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In: Preventive Veterinary Medicine. - : Elsevier. - 0167-5877 .- 1873-1716. ; 26:3-4, s. 167-185
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Journal article (peer-reviewed)abstract
- Broiler chickens are often intestinal carriers of Campylobacter. During processing, Campylobacter may be spread over the carcass. Thus, undercooked chicken meat, or other foods contaminated by raw chicken can act as a source of infection to humans. This study was conducted to identify risk factors for chicken flocks being colonized with Campylobacter. Eighteen chicken farms with altogether 62 chicken compartments were studied for 1 year with visits during each growing period and sampling of chicken caecal contents at slaughter. Four to six subsequent flocks were raised in each compartment during the study. A detailed questionnaire was used to record farm parameters such as building materials, feed and water equipment, hygiene and management routines. Campylobacter prevalence varied between farms, between growing periods within the farms and also during the year, with lowest prevalence during the spring. Campylobacters were isolated from 27% out of 287 flocks. Only two farms were negative at all samplings. Often the flock following a positive flock in a compartment was negative, indicating that normal cleaning and disinfecting routines are sufficient for eliminating the bacteria from the house. Usually only one serotype was found in each positive flock. Campylobacter occurrence increased with the age of the chickens at slaughter, and also with flock size.Univariable chi-square tests were done of the association between possible risk factors and Campylobacter prevalence. Factors associated with higher Campylobacter prevalence in flocks were lack of or diffuse hygiene barriers, increasing flock size, increasing age at slaughter, short vs. long empty periods, wet litter beds, other poultry nearby or staff handling other poultry, flocks divided before slaughter, staff loading to slaughter at several farms and occurrence of mice. Under Swedish conditions, water does not seem to be a source of infection for chickens. Origin and handling of day-old chickens, feed additives, houses and litter were not associated with higher Campylobacter prevalence.
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| 7. |
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| 8. |
- Ericsson, H., et al.
(author)
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Division into five groups by REA of the most frequently isolated phagovar of Listeria monocytogenes in Sweden 1976–1985
- 1996
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In: Medical Microbiology Letters. - : Birkhäuser Verlag. - 1018-4627. ; 5:3, s. 145-155
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Journal article (peer-reviewed)abstract
- One hundred and seven strains of Listeria monocytogenes isolated from human cases of listeriosis in Sweden during 1976-1985 were investigated. Sero- and phagetyping showed that 74 strains (69%) belonged to serovar 4b and that 47 of these strains also shared phagovar 2389:2425:3274:2671:47:108:340. Strains sharing this phagovar were further analyzed by REA, and could accordingly be arranged into five REA groups. However, the majority of the 47 strains were distributed in two of the groups. This indicates that two clones of L. monocytogenes were responsible for a major part of the human cases of listeriosis in Sweden during the ten-year period studied.
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| 9. |
- Fadul, Jamal E. M., et al.
(author)
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Identification of the complement activators and elucidation of the fate of complement activation products during extracorporeal plasma purification therapy
- 1998
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In: Journal of clinical apheresis. - 0733-2459 .- 1098-1101. ; 13:4, s. 167-173
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Journal article (peer-reviewed)abstract
- It has been known for many years that the complement system is activated during extracorporeal plasma purification (ECCP) therapy. In a previous study, we showed that high concentrations of complement activation products (CAPs) are returned to the patient during immunoadsorption treatment. In the present study, we investigated the question of where complement activation takes place with different forms of ECPP equipments as well as the fate of the CAPs. Eleven patients (8 men and 3 women), mean age 52 +/- 18 years, were included in the study. They were treated either with plasmapheresis (PP), immunoadsorption, bilirubin adsorption, or low density lipoprotein (LDL) apheresis. It was found that during all ECPP treatments and after the plasma separation filter, the plasma concentrations of CAPs were increased, and that high concentrations of CAPs were returned to the patients, except with PP. The plasma levels of individual CAPs varied between different types of ECPP. These variations were due to several factors: (1) complement activation (CA) on the plasma separator and a secondary device, e.g., column or membrane; (2) adsorption of specific CAPs to separation columns; and (3) reduction of CAPs due to separation and waste. Since CAPs have inflammatory and immunological effects, it is possible that high serum concentration of CAPs in the treated patients may influence the clinical outcome of the treatment. In conclusion, complement activation is a fact that should not be ignored during performance of any form of an ECPP. It is the plasma separator that plays a key role in the process of complement activation. Different ECPP treatments may have different effects regarding the levels of individual CAPs.
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| 10. |
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