SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Larsson M. K.) srt2:(2000-2004)"

Sökning: WFRF:(Larsson M. K.) > (2000-2004)

  • Resultat 1-50 av 82
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Highlights from the first year of Odin observations
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L39-L46
  • Tidskriftsartikel (refereegranskat)abstract
    • Key Odin operational and instrumental features and highlights from our sub-millimetre and millimetre wave observations of H2O, H218O, NH3, 15NH3 and O2 are presented, with some insights into accompanying Odin Letters in this A&A issue. We focus on new results where Odin's high angular resolution, high frequency resolution, large spectrometer bandwidths, high sensitivity or/and frequency tuning capability are crucial: H2O mapping of the Orion KL, W3, DR21, S140 regions, and four comets; H2O observations of Galactic Centre sources, of shock enhanced H2O towards the SNR IC443, and of the candidate infall source IRAS 16293-2422; H218O detections in Orion KL and in comet Ikeya-Zhang; sub-mm detections of NH3 in Orion KL (outflow, ambient cloud and bar) and ρ Oph, and very recently, of 15NH3 in~Orion KL. Simultaneous sensitive searches for the 119 GHz line of O2 have resulted in very low abundance limits, which are difficult to accomodate in chemical models. We also demonstrate, by means of a quantitative comparison of Orion KL H2O results, that the Odin and SWAS observational data sets are very consistently calibrated. Odin is a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes), and the Centre National d'études Spatiales (CNES, France). The Swedish Space Corporation (SSC) has been the prime industrial contractor, and is also responsible for the satellite operation from its Odin Mission Control Centre at SSC in Solna and its Odin Control Centre at ESRANGE near Kiruna in northern Sweden. See also the SNSB Odin web page: http://www.snsb.se/eng_odin_intro.shtml
  •  
2.
  • Pagani, L., et al. (författare)
  • Low upper limits on the O2 abundance from the Odin satellite
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L77-L81
  • Tidskriftsartikel (refereegranskat)abstract
    • For the first time, a search has been conducted in our Galaxy for the 119 GHz transition connecting to the ground state of O2, using the Odin satellite. Equipped with a sensitive 3 mm receiver (Tsys(SSB) = 600 K), Odin has reached unprecedented upper limits on the abundance of O2, especially in cold dark clouds where the excited state levels involved in the 487 GHz transition are not expected to be significantly populated. Here we report upper limits for a dozen sources. In cold dark clouds we improve upon the published SWAS upper limits by more than an order of magnitude, reaching N(O2)/N(H2) <= 10-7 in half of the sources. While standard chemical models are definitively ruled out by these new limits, our results are compatible with several recent studies that derive lower O2 abundances. Goldsmith et al. (\cite{SWAS2002}) recently reported a SWAS tentative detection of the 487 GHz transition of O2 in an outflow wing towards rho Oph A in a combination of 7 beams covering approximately 10arcmin x 14arcmin . In a brief (1.3 hour integration time) and partial covering of the SWAS region (~65% if we exclude their central position), we did not detect the corresponding 119 GHz line. Our 3 sigma upper limit on the O2 column density is 7.3x 1015 cm-2. We presently cannot exclude the possibility that the SWAS signal lies mostly outside of the 9\arcmin Odin beam and has escaped our sensitive detector. Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes) and Centre National d'Études Spatiales (CNES). The Swedish Space Corporation was the industrial prime contractor and is operating Odin.
  •  
3.
  • Sandqvist, Aa., et al. (författare)
  • Odin observations of H2O in the Galactic Centre
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L63-L67
  • Tidskriftsartikel (refereegranskat)abstract
    • The Odin satellite has been used to detect emission and absorption in the 557-GHz H216O line in the Galactic Centre towards the Sgr Astar Circumnuclear Disk (CND), and the Sgr A +20 km s-1 and +50 km s-1 molecular clouds. Strong broad H2O emission lines have been detected in all three objects. Narrow H2O absorption lines are present at all three positions and originate along the lines of sight in the 3-kpc Spiral Arm, the -30 km s-1 Spiral Arm and the Local Sgr Spiral Arm. Broad H2O absorption lines near -130 km s-1 are also observed, originating in the Expanding Molecular Ring. A new molecular feature (the ``High Positive Velocity Gas'' - HPVG) has been identified in the positive velocity range of ~+120 to +220 km s-1, seen definitely in absorption against the stronger dust continuum emission from the +20 km s-1 and +50 km s-1 clouds and possibly in emission towards the position of Sgr Astar CND. The 548-GHz H218O isotope line towards the CND is not detected at the 0.02 K (rms) level. Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes) and Centre National d'Études Spatiales (CNES). The Swedish Space Corporation was the industrial prime contractor and is also responsible for the satellite operation.
  •  
4.
  • Larsson, B., et al. (författare)
  • First NH3 detection of the Orion Bar
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L69-L72
  • Tidskriftsartikel (refereegranskat)abstract
    • Odin has successfully observed three regions in the Orion A cloud, i.e. Ori KL, Ori S and the Orion Bar, in the 572.5 GHz rotational ground state line of ammonia, ortho-NH3 (J,K) = (1,0) -> (0,0), and the result for the Orion Bar represents the first detection in an ammonia line. Several velocity components are present in the data. Specifically, the observed line profile from the Orion Bar can be decomposed into two components, which are in agreement with observations in high-J CO lines by Wilson et al. (\cite{wilson01}). Using the source model for the Orion Bar by these authors, our Odin observation implies a total ammonia abundance of NH3/H2 = 5x 10-9. Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes) and Centre National d'Études Spatiales (CNES). The Swedish Space Corporation has been the industrial prime contractor.
  •  
5.
  •  
6.
  • Wilson, C. D., et al. (författare)
  • Submillimeter emission from water in the W3 region
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L59-L62
  • Tidskriftsartikel (refereegranskat)abstract
    • Using the Odin satellite, we have mapped the submillimeter emission from the 110-101 transition of ortho-water in the W3 star-forming region. A 5arcminx 5arcmin map of the W3 IRS4 and W3 IRS5 region reveals strong water lines at half the positions in the map. The relative strength of the Odin lines compared to previous observations by SWAS suggests that we are seeing water emission from an extended region. Across much of the map the lines are double-peaked, with an absorption feature at -39 km s-1; however, some positions in the map show a single strong line at -43 km s-1. We interpret the double-peaked lines as arising from optically thick, self-absorbed water emission near the W3 IRS5, while the narrower blue-shifted lines originate in emission near W3 IRS4. In this model, the unusual appearance of the spectral lines across the map results from a coincidental agreement in velocity between the emission near W3 IRS4 and the blue peak of the more complex lines near W3 IRS5. The strength of the water lines near W3 IRS4 suggests we may be seeing water emission enhanced in a photon-dominated region. Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes), and Centre National d'Études Spatiales (CNES). The Swedish Space Corporation was the industrial prime contractor and is also responsible for the satellite operation.
  •  
7.
  • Liseau, R., et al. (författare)
  • First detection of NH3 (10 -> 00) from a low mass cloud core. On the low ammonia abundance of the rho Oph A core
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L73-L76
  • Tidskriftsartikel (refereegranskat)abstract
    • Odin has successfully observed the molecular core rho Oph A in the 572.5 GHz rotational ground state line of ammonia, NH3 (JK = 10 -> 00). The interpretation of this result makes use of complementary molecular line data obtained from the ground (C17O and CH3OH) as part of the Odin preparatory work. Comparison of these observations with theoretical model calculations of line excitation and transfer yields a quite ordinary abundance of methanol, X(CH3OH)= 3 x 10-9. Unless NH3 is not entirely segregated from C17O and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3) = 8 x 10-10. Based on observations with Odin, a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes) and Centre National d'Études Spatiales (CNES). The Swedish Space Corporation has been the industrial prime contractor. and based on observations collected with the Swedish ESO Submillimeter Telescope, SEST, in La Silla, Chile.
  •  
8.
  • Olofsson, Henrik, 1972, et al. (författare)
  • Odin water mapping in the Orion KL region
  • 2003
  • Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 402, s. L47-L54
  • Tidskriftsartikel (refereegranskat)abstract
    • New results from water mapping observations of the Orion KL region using the submm/mm wave satellite Odin (2.1\arcmin beam size at 557 GHz), are presented. The ortho-H2O \jkktrans{1}{1}{0}{1}{0}{1} ground state transition was observed in a 7arcminx 7arcmin rectangular grid with a spacing of 1\arcmin, while the same line of H218O was measured in two positions, Orion KL itself and 2\arcmin south of Orion KL. In the main water species, the KL molecular outflow is largely resolved from the ambient cloud and it is found to have an extension of 60\arcsec-110\arcsec. The H2O outflow profile exhibits a rather striking absorption-like asymmetry at the line centre. Self-absorption in the near (or ``blue'') part of the outflow (and possibly in foreground quiescent halo gas) is tentatively suggested to play a role here. We argue that the dominant part of the KL H218O outflow emission emanates from the compact (size ~ 15\arcsec) low-velocity flow and here estimate an H2O abundance of circa 10-5 compared to all H2 in the flow - an order of magnitude below earlier estimates of the H2O abundance in the shocked gas of the high-velocity flow. The narrow ambient cloud lines show weak velocity trends, both in the N-S and E-W directions. H218O is detected for the first time in the southern position at a level of ~ 0.15 K and we here estimate an H2O abundance of (1-8) x 10-8. Odin is a Swedish-led satellite project funded jointly by the Swedish National Space Board (SNSB), the Canadian Space Agency (CSA), the National Technology Agency of Finland (Tekes), and the Centre National d'Études Spatiales (CNES, France). The Swedish Space Corporation (SSC) was the industrial prime contractor and is also responsible for the satellite operation.
  •  
9.
  • Larsson, Matz L., et al. (författare)
  • Passive smoking and respiratory symptoms in the FinEsS Study
  • 2003
  • Ingår i: European Respiratory Journal. - : European Respiratory Society (ERS). - 0903-1936 .- 1399-3003. ; 21:4, s. 672-676
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of the present study was to examine the relationship between reported environmental tobacco smoke (ETS) exposure and respiratory symptoms. In 1996, a postal questionnaire was randomly distributed in three areas of Estonia to a population-based sample, of which 4,995 females and 1,822 males had never smoked. The main outcome measures were current respiratory symptoms and the amount of reported ETS exposure outside the home. ETS exposure at home was more common in females (31% versus 19%), while exposure outside of the home was more common in males (53% versus 7%). Females reported more symptoms from tobacco smoke than males (37.7% versus 21.6%). If ETS exposure outside of the home exceeded 5 h daily, the risk for wheeze (odds ratio (OR) 2.67, 95% confidence interval (CI) 1.98-3.61) and physician-diagnosed asthma (OR 1.79, 1.02-3.16) were increased. ETS exposure outside of the home was shown to be strongly related to almost all respiratory symptoms in a dose/response manner. ETS exposure at home did not show significantly elevated ORs for any respiratory symptoms. This study shows that females seem to be more troubled by environmental smoke exposure than males and provides further evidence of the serious health hazards associated with environmental smoke exposure. Indeed, the findings of this study support a ban on smoking in the workplace and public areas.
  •  
10.
  •  
11.
  •  
12.
  •  
13.
  • Brodin, B., et al. (författare)
  • Cloning and characterization of spliced fusion transcript variants of synovial sarcoma : SYT/SSX4, SYT/SSX4v, and SYT/SSX2v. Possible regulatory role of the fusion gene product in wild type SYT expression
  • 2001
  • Ingår i: Gene. - 0378-1119 .- 1879-0038. ; 268:02-jan, s. 173-182
  • Tidskriftsartikel (refereegranskat)abstract
    • The synovial sarcoma translocation t(X;18)(p11.2; q11.2) results in the fusion of the SYT gene on chromosome 18 to exon 5 of either SSX1 or SSX2 genes on chromosome X. We recently reported that the SSX4 gene is also involved in such a translocation. In the present investigation we cloned and sequenced the full-length cDNA of SYT/SSX1, SYT/SSX2 and SYT/SSX4 from synovial sarcoma tissues. We isolated a novel fusion transcript type Variant involving the fusion of SYT with exon 6 of the SSX4 gene (SYT/SSX4v). The SYT/SSX4 and SYT/SSX2 open reading frame also differed from previously reported SYT/SSX sequences by an in-frame addition of 93bp exon located in the junction between exon 7 and 8 of the SYT. This exon is identical to that reported for the murine SYT but has not been previously found in the human transcript. Two SYT transcripts, with and without the 93 bp exon, were co-expressed in mouse NIH3T3 cells, human malignant cells and human testis tissue, but not in human normal fibroblasts. Stable transfection of an SYT/SSX4 expression vector into human and murine cell lines correlated with a down-regulation of SYT transcripts. This was also observed in a synovial sarcoma tumor expressing SYT/SSX4. This suggests that the SYT/SSX fusion gene may regulate SYT expression from the normal allele and as such alter the normal function of SYT.
  •  
14.
  •  
15.
  • Edgren, M, et al. (författare)
  • Angiogenic factors: vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (b-FGF) are not necessarily elevated in patients with advanced renal cell carcinoma.
  • 2001
  • Ingår i: Anticancer research. - 0250-7005. ; 21, s. 1423-
  • Tidskriftsartikel (refereegranskat)abstract
    • Serum analysis of Vascular Endothelial Growth Factor (VEGF) and basic Fibroblast Growth Factor (b-FGF) levels were studied in 53 patients with renal cell carcinoma (RCC). Approximately 2/3 of the patients had disseminated disease at diagnosis, the remainder had no evidence of metastases. The results confirmed that VEGF has a major role in the angiogenesis of RCC. No correlation was observed between VEGF and/or b-FGF and the presence or absence of metastases, nor was any correlation observed between VEGF and/or b-FGF and patient survival. Thus, to utilise VEGF and/or b-FGF as a tumour marker at the time of diagnosis to predict patients with a high risk of progression, where an adjuvant therapeutic approach would be of great value, seems to be limited. Not all patients with RCC exhibited elevated serum levels of VEGF and/or b-FGF. No correlation was observed between tumour stage and serum levels of these angiogenic peptides.
  •  
16.
  •  
17.
  • Gogova, Daniela, et al. (författare)
  • Optical and structural characteristics of virtually unstrained bulk-like GaN
  • 2004
  • Ingår i: Japanese Journal of Applied Physics. - 0021-4922 .- 1347-4065. ; 43:4A, s. 1264-1268
  • Tidskriftsartikel (refereegranskat)abstract
    • Bulk-like GaN with high structural and optical quality has been attained by hydride vapor-phase exitapy (HVPE). The as-grown 330 mum-thick GaN layer was separated from the sapphire substrate by a laser-induced lift-off process. The full width at half maximum values of the X-ray diffraction (XRD) omega-scans of the free-standing material are 96 and 129 arcsec for the (1 0 -1 4) and (0 0 0 2) reflection, respectively, which rank among the smallest values published so far for free-standing HVPE-GaN. The dislocation density determined by plan-view TEM images is 1-2 x 10(7) cm(-2). Positron annihilation spectroscopy studies show that the concentration of Ga vacancy related defects is about 1.5 x 10(16) cm(-3). The high-resolution XRD, photoluminescence, mu-Raman, and infrared spectroscopic ellipsometry measurements consistently prove that the free-standing material is of high crystalline quality and virtually strain-free. Therefore it is suitable to serve as a substrate for stress-free growth of high-quality III-nitrides based device heterostructures.
  •  
18.
  • Hines, C J, et al. (författare)
  • Characterization of endotoxin and 3-hydroxy fatty acid levels in air and settled dust from commercial aircraft cabins.
  • 2003
  • Ingår i: Indoor Air. - : Hindawi Limited. - 0905-6947. ; 13:2, s. 166-173
  • Tidskriftsartikel (refereegranskat)abstract
    • Endotoxin was measured in air and dust samples collected during four commercial aircraft flights. Samples were analyzed for endotoxin biological activity using the Limulus assay. 3-hydroxy fatty acids (3-OH FA) of carbon chain lengths C10:0-C18:0 were determined in dust by gas chromatography-ion trap tandem mass spectrometry. The geometric mean (geometric standard deviation) endotoxin air level was 1.5 EU/m3 (1.9, n = 28); however, significant differences were found by flight within aircraft type. Mean endotoxin levels were significantly higher in carpet dust than in seat dust (140 ± 81 vs. 51 ± 25 EU/mg dust, n = 32 each, P < 0.001). Airborne endotoxin levels were not significantly related to either carpet or seat dust endotoxin levels. Mean 3-OH FA levels were significantly higher in carpet dust than in seat dust for C10:2, C12:0, and C14:0 (P < 0.001 for each), while the mean level of C16:0 was significantly higher in seat dust than in carpet dust (P < 0.01). Carpet dust endotoxin was significantly, but moderately, correlated with 3-OH-C12:0 and 3-OH-C14:0 (Pearson r = 0.52 and 0.48, respectively), while correlation of seat dust endotoxin with individual 3-OH FAs depended on the test statistic used. Mean endotoxin potency was significantly higher for carpet dust than for seat dust (6.3 ± 3.0 vs. 3.0 ± 1.4 EU/pmol LPS, P < 0.0001). Mean endotoxin levels in the air and dust of commercial aircraft cabins were generally higher than mean levels reported in homes and office buildings. These results suggest that exposure route and dust source are important considerations when relating endotoxin exposure to specific health outcomes.
  •  
19.
  •  
20.
  • Larsson, Lars, et al. (författare)
  • The Enigmatic House
  • 2004
  • Ingår i: Continuity for centuries : a ceremonial building and its context at Uppåkra, southern Sweden. - 9122021078 ; , s. 3-48
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • Abstract is not available.
  •  
21.
  •  
22.
  • Larsson, M., et al. (författare)
  • The alveolar surface is lined by a coherent liquid-crystalline phase
  • 2002
  • Ingår i: Progress in Colloid & Polymer Science. - 0340-255X. ; 120, s. 28-34
  • Konferensbidrag (refereegranskat)abstract
    • The existence of a uniform phase at the alveolar surface is demonstrated by polarizing microscopy and cryogenic transmission electron microscopy (cryo-TEM). Rabbit lungs were opened and the alveolar surface film was directly deposited on optical microscope coverslips and on electron microscope grids. In the polarizing microscope, the alveolar surface material deposited exhibits a uniform birefringence, which shows that the alveolar surface is lined by a coherent liquid-crystalline phase; a surface phase. Cryo-TEM, with reduced risks of artifacts compared to conventional electron microscopy, shows the existence of a mechanically stable and continuous surface structure of regularly spaced bilayers oriented along the grid surface over large distances (microns). The periodicity observed by cryo-TEM indicates that the surface phase has the same inner organization as the ultrastructure known as tubular myelin (TM). Two alternative structures of TM are considered: the traditional crossed bilayer structure and a bilayer structure free from intersections according to the so-called crossed layers of parallels (CLP) minimal surface. Evidence presently available favors the CLP minimal surface structure alternative. The implication of the existence of a surface phase on the barrier function of the alveolar surface zone is finally considered
  •  
23.
  •  
24.
  •  
25.
  • Lindberger, M, et al. (författare)
  • Gabapentin versus vigabatrin as first add-on for patients with partial seizures that failed to respond to monotherapy: a randomized, double-blind, dose titration study. GREAT Study Investigators Group. Gabapentin in Refractory Epilepsy Add-on Treatment.
  • 2000
  • Ingår i: Epilepsia. - : Wiley. - 0013-9580 .- 1528-1167. ; 41:10, s. 1289-95
  • Tidskriftsartikel (refereegranskat)abstract
    • Our objective was to compare the efficacy and safety of gabapentin and vigabatrin as first-line add-on treatment in patients with partial epilepsy.This was a multicenter, double-blind, randomized dose titration study. After baseline assessment and randomization, the dose could be increased if seizures persisted and reduced if side effects occurred. Health-related quality of life was assessed at baseline and at the end of the study. By a protocol amendment post hoc, all randomized patients were offered a standardized perimetry examination at the end of the study. Improvement rate was the proportion of patients with a reduction of seizure frequency of at least 50% during an 8-week period without any adverse events causing withdrawal.One hundred two patients were randomized and analyzed on an intent-to-treat basis. The improvement rate was 48% in the gabapentin group and 56% in the vigabatrin group. The improvement rate, when per protocol criteria were fulfilled, was 57% in the gabapentin group and 59% in the vigabatrin group. The proportion of seizure-free patients was 31% in the gabapentin group and 39% in the vigabatrin group. There was no difference in quality-of-life scores between the groups. Perimetry after termination of the study on 64 patients showed abnormal results in 3 of 32 patients in the vigabatrin group.Approximately one third of the patients in both groups became seizure-free. Although no major differences were seen in terms of the improvement rate between the groups, equivalence between the two drugs was not found.
  •  
26.
  • Naylor, G. A, et al. (författare)
  • A sub-picosecond accumulating streak camera for x-rays
  • 2001
  • Ingår i: Measurement Science & Technology. - : IOP Publishing. - 0957-0233 .- 1361-6501. ; 12:11, s. 1858-1864
  • Tidskriftsartikel (refereegranskat)abstract
    • An x-ray streak camera system uses a laser triggered photo-conductive switch to synchronize the high voltage ramp applied to its sweep plates to the photo-excitation of a sample. This technique allows the jitter. between successive sweeps to be kept below 100 fs compared to over 1 ps:using classical methods. By accumulating a stable pulsed x-ray signal over many sweeps, a very high dynamic range can be achieved whilst maintaining a sub-picosecond time resolution. The ultimate time resolution is limited by the dispersion of electrons in the streak tube. Whilst triggering with a laser at 900 Hz we have achieved a time resolution (FWHM) of 640 fs at a detection wavelength of 267 nm for a 60 s accumulation period, corresponding to over 50 000 sweeps.
  •  
27.
  •  
28.
  •  
29.
  •  
30.
  • Räty, Lena K.A, et al. (författare)
  • The relationship between illness severity, sociodemographic factors, general self-concept, and illness-specific attitude in Swedish adolescents with epilepsy
  • 2004
  • Ingår i: Seizure. - : Elsevier BV. - 1059-1311 .- 1532-2688. ; 13:6, s. 375-382
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: The aim of this study was to describe the relationship between the epilepsy condition (illness severity), sociodemographic factors, general self-concept, and illness-specific attitude in adolescents with uncomplicated epilepsy.Methods: Adolescents, aged 13–22, fulfilling criteria registered in four Swedish hospitals, answered questionnaires (n=149). The instruments “I think I am” and “Sense of coherence” measured the patients’ general self-concept. The “Child Attitude Toward Illness Scale” measured illness-specific attitude. A summary score (index) calculated from seizure frequency, seizure type, and antiepileptic drug (AED) with side effects measured “Illness Severity”.Results: Illness severity was significantly related to the participants’ general self-concept, as well as to their attitude toward their condition; i.e. higher illness severity scores were correlated with lower sense of coherence (SOC), poorer self-esteem, and a more negative attitude towards the epilepsy condition. Females had more severe illness according to the Illness Severity Index, with almost 80% found in the moderate and high severity groups as compared to 63% of males in the moderate/high severity groups.Conclusions: It was concluded that the severity of the epilepsy condition was related to the adolescents’ general self-concept and illness-specific attitude, but further research is needed to understand the causality of the relationship. The brief assessment of illness severity, constructed and used in this study should be addressed and developed further.
  •  
31.
  •  
32.
  •  
33.
  • Ahlen, N., et al. (författare)
  • On the carbothermal vapour-liquid-solid (VLS) mechanism for TaC, TiC, and TaxTi1-xC whisker growth
  • 2000
  • Ingår i: Journal of the European Ceramic Society. - 0955-2219 .- 1873-619X. ; 20:14-15, s. 2607-2618
  • Tidskriftsartikel (refereegranskat)abstract
    • The growth of TaC, TiC and TaxTi1-xC whiskers has been studied in some detail. The whiskers were synthesised via a vapour-liquid-solid (VLS) growth mechanism in the temperature range 1220-1400 degreesC. The starting materials were Ta2O5, TiO2, C, NaCl, and a catalyst metal (Ni, Co, Fe, and Cu were tested). The main reaction during synthesis was a carbothermal reduction of Ta2O5 and TiO2, and NaCl was added to form the oxochlorides and chlorides of Ta and Ti that account for the transport to the catalyst metal. The syntheses were made in a protecting Ar atmosphere. From experiments interrupted after different times at the synthesis temperature it is clear that sodium tantalates form as intermediate products, whereas sodium titanates cannot be identified. Only metals that are able to dissolve the elements building up the whiskers work as catalysts. Whisker growth starts either from a catalyst droplet in contact with carbon or from an oxide particle in contact with both catalyst metal and carbon. For TaC and TaxTi1-xC the only growth direction observed is [100], while TiC may grow either along [100] or along [111].
  •  
34.
  •  
35.
  •  
36.
  •  
37.
  •  
38.
  •  
39.
  •  
40.
  •  
41.
  •  
42.
  • Dahlback, M, et al. (författare)
  • Enhanced insulin absorption in the rabbit airways and lung by sodium dioctyl sulfosuccinate
  • 2002
  • Ingår i: Journal of Aerosol Medicine. - : Mary Ann Liebert Inc. - 0894-2684 .- 1557-9026. ; 15:1, s. 27-36
  • Tidskriftsartikel (refereegranskat)abstract
    • The objective of this investigation was to study regional absorption of inhaled insulin together with an enhancer (sodium di-octyl-sulfosuccinate [DOSS]) in the rabbit airways and lung. Insulin was administered with or without DOSS by aerosol inhalation, intratracheal infusion, intranasally, sublingually, and without DOSS intravenously. Blood glucose and plasma levels of insulin were measured during 100 min from the start of administration. Inhalation of insulin (3 U) with 0.25% or 1% DOSS decreased average blood glucose levels significantly more than inhalation of insulin (3 U) without DOSS. Intratracheal administration of 1.5 U of insulin with 0.25% DOSS in 0.3 mL of vehicle decreased the average blood glucose level significantly compared with intratracheal administration of 1.5 U of insulin and no DOSS in 0.3 mL of vehicle and compared with 1.5 U of insulin with 0.25% DOSS in 0.15 mL of vehicle. Intravenous insulin (1.5 U) and inhaled (1.5 U) insulin in 0.25% DOSS decreased average blood glucose levels significantly compared with intratracheal (0.15 mL), intranasal, and sublingual administration of 1.5 U of insulin with 0.25% DOSS. The bioavailability of inhaled insulin (1.5 U) with 0.25% DOSS was estimated to be 16% in comparison with 7% for intratracheally (0.15 mL), 1% intranasally, and 0.8% sublingually administered insulin (1.5 U with 0.25% DOSS), respectively. Inhaled insulin together with the absorption enhancer DOSS decreased the blood glucose level more effectively than insulin given intratracheally, intranasally, or sublingually. The effect on blood glucose reflected the difference in plasma insulin concentration for the different routes of administration.
  •  
43.
  • Dahlqvist, Ralf, 1973, et al. (författare)
  • Association of calcium with colloidal particles and speciation of calcium in the Kalix and Amazon rivers
  • 2004
  • Ingår i: Geochimica Et Cosmochimica Acta. - : Elsevier BV. - 0016-7037 .- 1872-9533. ; 68:20, s. 4059-4075
  • Tidskriftsartikel (refereegranskat)abstract
    • A considerable amount of colloidally bound Ca has been detected in water samples from Amazonian rivers and the Kalix River, a sub-arctic boreal river. Fractionation experiments using several analytical techniques and processing tools were conducted in order to elucidate the matter. Results show that on average 84% of the total Ca concentration is present as free Ca. Particulate, colloidal and complexed Ca constitute the remaining 16%, of which the colloidal fraction is significant. Ultrafiltration experiments show that the colloidal fraction in the sampled Amazonian rivers and the Kalix River range between 1% and 25%. In both the Amazonian and the Kalix rivers the technique of cross-flow ultrafiltration was used to isolate particles and colloids. The difference in concentration measured with ICP-AES and a Ca ion-selective electrode in identical samples was used to define the free Ca concentration and thus indirectly the magnitude of the particulate, colloidal and complexed fractions. Results from the Kalix and Amazonian rivers are in excellent agreement. Furthermore, the results show that the colloidal concentrations of Ca can be greatly overestimated (up to 227%) when conventional analysis and calculation of ultrafiltration data is used due to retention of free Ca ions during the ultrafiltration process. Calculation methods for colloidal matter are presented in this work, using complementary data from ISE analysis. In the Kalix River temporal changes in the fractionation of Ca were studied before, during and after a spring-flood event. Changes in the size distribution of colloidally associated Ca was studied using FlFFF (Flow Field-Flow Fractionation) coupled on-line to a HR ICP-MS. The FlFFF-HR ICP-MS fractograms clearly show the colloidal component of Ca, supporting the ultrafiltration findings. During winter conditions the size distribution of colloidally associated Ca has a concentration maximum at similar to5 to 10 nm in diameter, shifting to smaller sizes (<5 mm) during and after the spring flood. This shift in size distribution follows a change in the river during this period from ironoxyhydroxy colloids being the most important colloidal carrier phase to humic substances during and after the spring flood. WHAM and NICA-Donnan models were used to calculate the amount of colloidally bound Ca. The results similar for both models, show that on average 16% of the Ca may be associated to a colloidal phase, which is in broad agreement with the measurements. Copyright (C) 2004 Elsevier Ltd.
  •  
44.
  •  
45.
  •  
46.
  •  
47.
  • Fritioff, K, et al. (författare)
  • Single and double detachment from H-
  • 2004
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622 .- 2469-9926 .- 2469-9934. ; 69:4, s. 042707-
  • Tidskriftsartikel (refereegranskat)abstract
    • Absolute cross sections for single and double detachment from H- following electron impact have been measured over a range of collision energies from the thresholds to 170 eV. The measurements were made using a magnetic storage ring. The ions in the ring were merged with a monoenergetic electron beam and neutral and positively charged fragments were detected. We cover larger energy ranges than in many of the previous experiments, and this is the first time both single and double detachment have been measured simultaneously. This allows us to present accurate ratios between the single and double detachment cross sections. On the basis of these ratio measurements we discuss possible mechanisms leading to double detachment.
  •  
48.
  •  
49.
  •  
50.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-50 av 82
Typ av publikation
tidskriftsartikel (64)
konferensbidrag (14)
bokkapitel (2)
rapport (1)
recension (1)
Typ av innehåll
refereegranskat (64)
övrigt vetenskapligt/konstnärligt (18)
Författare/redaktör
Larsson, K (14)
Larsson, B (9)
Olofsson, G. (8)
Pagani, L (8)
Lecacheux, A. (8)
Frisk, U. (8)
visa fler...
Sandqvist, Aa. (8)
Bergman, P. (7)
Hasegawa, T. (7)
Falgarone, E. (7)
Ristorcelli, I. (7)
Larsson, C (7)
Larsson, A (7)
Kwok, S (7)
Buat, V. (7)
Gerin, M. (7)
Fich, M. (7)
Olberg, M. (7)
Harju, J. (7)
Mattila, K. (7)
Larsson, M (6)
Florén, H.-G. (6)
Serra, G (6)
Hjalmarson, Å (6)
Plume, R. (6)
Hedrén, M (5)
Renstrom, A (5)
Feldman, P. (5)
Black, J H (5)
Deppert, Knut (4)
Samuelson, L. (4)
Dick, K. A. (4)
Encrenaz, P. (4)
Seifert, W (4)
Bernath, P. (4)
Karlsson, AS (4)
Larsson, Gerry (3)
Larsson, Lars (3)
Larsson, O (3)
Carlsson, K (3)
Larsson, P (3)
Nygren, Peter (3)
Booth, R.S. (3)
Lindqvist, M (3)
Mårtensson, T (3)
Teh, BT (3)
Wallenberg, L R (3)
Encrenaz, P. J. (3)
Larsson, M W (3)
Johansson, L E B (3)
visa färre...
Lärosäte
Karolinska Institutet (38)
Uppsala universitet (22)
Lunds universitet (15)
Stockholms universitet (8)
Göteborgs universitet (4)
Kungliga Tekniska Högskolan (4)
visa fler...
Linköpings universitet (4)
Chalmers tekniska högskola (3)
Luleå tekniska universitet (2)
Försvarshögskolan (2)
Umeå universitet (1)
Örebro universitet (1)
Malmö universitet (1)
Södertörns högskola (1)
RISE (1)
Karlstads universitet (1)
visa färre...
Språk
Engelska (82)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (12)
Medicin och hälsovetenskap (11)
Humaniora (2)
Teknik (1)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy